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Infrastructure and Organization of Adult Intensive Care Units in Resource-Limited Settings

  • Alfred Papali
  • Neill K. J. Adhikari
  • Janet V. Diaz
  • Arjen M. Dondorp
  • Martin W. DünserEmail author
  • Shevin T. Jacob
  • Jason Phua
  • Marc Romain
  • Marcus J. Schultz
Open Access
Chapter

Abstract

In this chapter, we provide guidance on some basic structural requirements, focusing on organization, staffing, and infrastructure. We suggest a closed-format intensive care unit (ICU) with dedicated physicians and nurses, specifically trained in intensive care medicine whenever feasible. Regarding infrastructural components, a reliable electricity supply is essential, with adequate backup systems. Facilities for oxygen therapy are crucial, and the choice between oxygen concentrators, cylinders, and a centralized system depends on the setting. For use in mechanical ventilators, a centralized piped system is preferred. Facilities for proper hand hygiene are essential. Alcohol-based solutions are preferred, except in the context of Ebola virus disease (chloride-based solutions) and Clostridium difficile infection (soap and water). Availability of disposable gloves is important for self-protection; for invasive procedures masks, caps, sterile gowns, sterile drapes, and sterile gloves are recommended. Caring for patients with highly contagious infectious diseases requires access to personal protective equipment. Basic ICU equipment should include vital signs monitors and mechanical ventilators, which should also deliver noninvasive ventilator modes. We suggest that ICUs providing invasive ventilatory support have the ability to measure end-tidal carbon dioxide and if possible can perform blood gas analysis. We recommend availability of glucometers and capabilities for measuring blood lactate. We suggest implementation of bedside ultrasound as diagnostic tool. Finally, we recommend proper administration of patient data; suggest development of locally applicable bundles, protocols, and checklists for the management of sepsis; and implement systematic collection of quality and performance indicators to guide improvements in ICU performance.

3.1 Introduction

Published guidelines regarding optimal infrastructure and organization of intensive care units (ICUs) are based on evidence primarily from resource-rich settings [1]. These guidelines may be less applicable to resource-limited settings [2]. ICUs around the world differ in available resources, and our working group [2] and others [1] have different definitions what an ICU entails. In this chapter, we aim to answer seven questions basic prerequisites for quality intensive care in resource-limited settings: (1) Which healthcare professionals should provide care in ICUs in resource-limited settings? (2) How should these healthcare professionals be trained? (3) How should electricity be supplied to ICUs in resource-limited settings? (4) How should oxygen be supplied to ICUs in resource-limited settings? (5) Which hygienic facilities are fundamental in ICUs in resource-limited settings? (6) Which technical equipment should be available in ICUs in resource-limited settings? (7) Which quality measures to improve care should be implemented in ICUs in resource-limited settings? We provide a series of simple, pragmatic recommendations for optimizing ICU infrastructure and organization in resource-limited settings, with a focus on adult ICUs (Table 3.1). Understanding the great variability of technical, material, and human resources within and between these environments, each institution must determine the utility of implementing these recommendations based on local capabilities.
Table 3.1

Recommendations for ICU infrastructure and organization in resource-limited settings (with grading)

1

Staffing

We suggest that, if possible, ICUs use a closed-format model where physicians specifically trained or experienced in intensive care medicine direct patient care (2B). We further suggest that ICUs be staffed with nurses who are trained in intensive care nursing (2C). Wherever available, allied healthcare professionals (e.g., pharmacists) should be part of an ICU team (UG). Currently, no recommendation on ICU telemedicine in resource-limited settings can be made

2

Training

We suggest that all healthcare professionals working in ICUs be specifically trained in the care of the critically ill patient (2C). Unless national or regional specialty training programs in intensive care medicine are available, we suggest that training of ICU physicians, nurses, and allied healthcare professionals occurs through longitudinal, multimodal programs coordinated by partnerships between Ministries of Health, national and international professional societies, nongovernmental organizations, as well as institutions with well-established programs in ICU training (2D). We recommend that such ICU training programs adhere to validated, international standards of intensive care medicine, but that they be adapted to local needs and resources (1C)

3

Electricity

A stable electricity supply is an essential infrastructural component of an ICU (UG). We recommend that ICUs use voltage stabilizers in case voltage fluctuations endanger the function of electrical medical equipment (1D). We recommend that adequate backup electrical sources be available to bridge power cuts (1C). We suggest that these backup electrical sources take over electricity supply automatically allowing for (near) continuous functioning of life-sustaining medical equipment (2D). We recommend that ICUs with no adequate backup electrical source have protocols in place guiding ICU staff how to bridge life-sustaining therapies during power cuts (1D)

4

Oxygen

Oxygen therapy is an essential provision for critically ill patients, and an adequate oxygen supply is a crucial infrastructural component of an ICU (UG). We recommend that ICUs choose the type of oxygen supply (concentrators, cylinders, centralized system) based on site-specific conditions and requirements (1B). We suggest that, if feasible, oxygen be supplied by centralized, piped systems to ICUs when mechanical ventilators are used (2D)

5

Hygiene

We recommend that ICUs have available an adequate number of and easily accessible facilities for handwashing/hand hygiene (1A). We recommend hand hygiene after each patient contact with an alcohol-based solution (1A). Exception are hand hygiene in the context of Ebola virus disease requiring chlorine-based solutions (1C) and Clostridium difficile requiring water and soap. In case alcohol-based solutions are unavailable, we recommend using soap and water for handwashing (1A). Alcohol hand rub solutions may be produced locally and carried in small bottles by each healthcare worker (UG). We recommend that non-sterile, clean examination gloves for self-protection of medical staff be available (1C). Importantly, gloved hands can equally transmit infectious pathogens; use of gloves does not replace the need for subsequent hand hygiene (UG). We recommend the availability of masks, caps, sterile gowns, sterile drapes, and sterile gloves for invasive procedures, such as insertion of central venous catheters (1A). We recommend that ICUs and hospitals in areas where highly contagious infectious diseases (e.g., tuberculosis, Ebola virus disease) are endemic have rapid access to adequate quantities of personal protective equipment as recommended by the World Health Organization and the Centers for Disease Control and Prevention (1C). We suggest that hospitals develop individual policies and procedures for reuse of disposable personal protective and other medical equipment (2C). When ICUs are renovated or newly built, we suggest compliance with national and international best-practice recommendations on ICU architectural design (2D)

6

Equipment

Acquisition of technical equipment should be guided by local availability and feasibility of routine maintenance (UG). We recommend basic vital signs monitors (including electrocardiogram, respiratory rate, oscillometric blood pressure, and pulse oximetry) available for each ICU bed (1C). We recommend that ICUs have one or more mechanical ventilators available (1C). These mechanical ventilators should also deliver noninvasive ventilatory modes, measure tidal volume and airway pressures, and support oxygen delivery (1B). We suggest that ICUs providing invasive ventilatory support have the ability to measure end-tidal carbon dioxide (2C) and to perform blood gas analysis (2C). We recommend that ICUs have point-of-care capabilities for measuring blood glucose (e.g., glucometers) (1B). We recommend that ICUs have capabilities for measuring blood lactate levels (1B). We suggest that ICUs have available point-of-care ultrasound devices (2C) and that key clinical staff undergo formal ultrasound training (2C)

7

Quality

We recommend maintaining patient records and ICU documentation in accordance with national regulations and requirements (1D). We suggest that ICUs develop locally applicable bundles, protocols, and checklists to improve quality of care (2C). We suggest that ICUs systematically collect quality and performance indicators and participate in national/international benchmarking projects (2C)

Abbreviations: ICU intensive care unit, UG ungraded

3.2 Staffing

In resource rich settings, intensive care medicine has evolved into a multidisciplinary and team-based approach. Involvement of ICU physicians and other healthcare professionals results in better outcomes and reduces costs of care [3, 4]. Postgraduate training in the specialty of intensive care medicine is becoming more commonplace for ICU physicians, ICU nurses, and even allied healthcare professionals in most high-income countries [5, 6]; training in intensive care medicine is commonly available for physicians from different medical specialties. Most training programs last at least 1 year and end with a national or international examination [6]. Accreditation and certification in different sub-specialties (e.g., neuro-intensive care) or examination techniques (e.g., echocardiography, lung ultrasound) can be achieved in some countries [6].

Studies in resource-rich settings show that the physician–staffing model in use affects outcomes of critically ill patients [7, 8, 9]. In comparison to a so-called open ICU model, in which physicians from outside the ICU remain directly responsible for the care of their patients, a so-called closed ICU model, in which one or more physicians, usually trained in intensive care medicine, and exclusively based within the ICU, become responsible for the critically ill patients, results in lower mortality rates, shorter length of stay, and reduced costs of care [7].

Studies in resource-rich settings also show that the nurse–staffing model affects outcomes of critically ill patients [10]. More nurses available per ICU bed improves survival rates, particularly for patients at a high risk of dying [11], reduces postoperative [12] and infectious complications like ventilator-associated pneumonia [13], and prevents medication errors [14]. A higher nurse-to-patient ratio is also independently associated with a better compliance with, for example, sepsis care bundles [15]. Notably, a higher nurse-to-patient ratio prevents burnout of nurses [16]. Studies in resource-rich settings also suggest that the presence of allied healthcare professionals like pharmacists [17], respiratory or physical therapists [18], and dieticians [19] within a multidisciplinary ICU team improves patient outcomes [3]. Furthermore, proactive communications with infectious disease specialists or microbiologists favorably affect antibiotic use and costs [20].

Finally, so-called telemedicine in ICUs in resource-rich settings, mainly to solve the problem of physician shortages during nighttime hours and in some ICUs with low-intensity staffing [21], has been shown to improve early identification of patients who deteriorate [22] and increases the number of interventions [23], but the effect on ICU outcomes remains controversial [24] and costs of required technological infrastructure are high [25].

There is minimal evidence from resource-limited settings that ICU outcomes improve after changing from an “open ICU model” to a “closed ICU model.” One before–after study from Thailand showed a 4% absolute mortality reduction (from 27.4 to 23.4%, p = 0.03) and shortening of length of stay of 0.8 days (−1.3 to −0.25, p < 0.01) in a surgical ICU [26]. The reduction in mortality was greatest in patients with a length of stay >48 h (22.7 vs. 13.9%, p < 0.01). A prospective before–after study in a large university hospital in Turkey demonstrated a 4.5-fold reduction of in-hospital mortality after introduction of the “closed ICU model” [27]. The survival effects were most prominent in patients requiring mechanical ventilation. Postgraduate training programs in intensive care medicine for physicians have been established in selected resource-limited settings such as India [28], Ethiopia [29], Brazil [30], China [31], and South Africa [32], but the literature fails to report on outcome changes after its establishment.

No studies have been published from resource-limited settings evaluating patient outcomes related to nurse-to-patient ratios. Evidence from resource-limited settings confirms the benefits of including pharmacists into the multidisciplinary ICU team on patient outcomes [17]. Studies from China, Thailand, Jordan, Egypt, and Vietnam demonstrated consistent reductions in medication costs [33, 34, 35] and adverse events [36] after involvement of a pharmacist in daily ICU practice. No studies on the effects of including physicians from other backgrounds (e.g., infectious disease specialists) or allied healthcare professionals (e.g., psychologists, case managers, social workers, respiratory therapists, dieticians, or physical therapists) into ICU teams in resource-limited settings were identified by our search.

Data on implementation of telemedicine in resource-limited ICUs is minimal despite reports of successful implementation in areas with a scarcity of specialists [37]. Only one study, performed in India in patients with acute myocardial infarction, showed a reduction in mortality following implementation of telemedicine [38].

Despite the trends indicating that a “closed ICU model” improves patient outcomes in resource-limited ICUs, human resources are inconsistently available in most of these settings. The number of physicians per 1000 inhabitants is substantially lower in low- and middle- than high-income countries [39]. This leaves many hospitals in resource-limited areas with a critical shortage of physicians, particularly during off-hours, weekends, and holidays. From the authors’ experience, in some hospitals, a physician is completely absent during nighttime. Patient care is then, for example, overseen by mid-level providers, such as clinical officers.

No systematic data on the availability of physicians specialized in intensive care medicine have been published for resource-limited settings. There also are no studies detailing the relevance of ICU training methods typically found in resource-rich settings amid the different cultural and disease pattern contexts of resource-limited settings. Despite the availability of specialty training programs in selected countries, regional data and the experience of the authors suggest that intensive care specialists are unavailable in many ICUs in resource-limited settings [40]. Some ICUs in sub-Saharan Africa are, for example, run and staffed by “anesthetic officers” (non-physicians with specific training in certain elements of anesthesia) in close cooperation with surgeons, internal medicine specialists, and pediatricians [41, 42, 43, 44].

The number of nurses per 1000 inhabitants is substantially lower in low- and middle- than in high-income countries [45]. Consequently, the number of nursing staff is limited in many ICUs in resource-limited settings [46]. Limited availability of nursing staff in resource-limited ICUs naturally leads to low nurse-to-patient ratios of often 1:4 or higher, particularly during off-hours and weekends. It can be assumed that similar associations between nurse-to-patient ratios and outcomes exist in resource-limited and resource-rich settings. However, given the general shortage of nursing staff, especially those trained in intensive care nursing, it is highly questionable whether cutoff values for nurse-to-patient ratios established in resource-rich setting specific guidelines (e.g., 1:2) can be extrapolated to ICUs in resource-limited settings. Allied healthcare professionals, such as physiotherapists and dieticians, are usually unavailable in many, if not most, resource-limited ICUs [40]. If these healthcare professionals are available in the hospital or even the ICU, they are, in the experience of the authors, often not trained or experienced in caring for the critically ill patient. Accordingly, dedicated critical care pharmacists are uncommon in many resource-limited ICUs [47], and even if available, their presence during ICU rounds, where benefits are strongest [48], is limited [49]. In addition, high staff-related costs may strain or exceed tight budgets of hospitals and be another reason why a multidisciplinary ICU model appears less feasible in resource-limited than in resource-rich settings. In the absence of dedicated ICU staff, family members often assume an important role in caring for the patient.

Increasing global Internet connectivity and the ubiquity of mobile phones could facilitate low-cost ICU telemedicine and translate to rapid and accessible ICU consultative services in some resource-limited settings [50]. However, related implementation and maintenance costs, unavailability of stable Internet coverage in many rural or remote areas, and questions of credentialing and accountability for out-of-country-based telemedicine providers remain ongoing challenges. Author experience suggests that telemedicine links between “sister hospitals,” one in a resource-limited setting and one in a resource-rich setting, may provide meaningful collaboration and educational opportunities on both sides. Finally, we could not identify any safety considerations to the implementation of a multidisciplinary team approach in ICUs in resource-limited settings.

We suggest that, if possible, ICUs use a closed-format model where physicians specifically trained or experienced in intensive care medicine direct patient care (2B). We further suggest that ICUs be staffed with nurses who are trained in intensive care nursing (2C). Wherever available, allied healthcare professionals (e.g., pharmacists) should be part of an ICU team (ungraded). Currently, no recommendation on ICU telemedicine in resource-limited settings can be made.

3.3 Training

The care of the critically ill patient substantially differs from noncritically ill patients and thus requires specific training of all healthcare professionals involved due to the complex care requirements. High-performing ICUs are typically staffed with ICU physicians and nurses and allied health professionals who, in addition to general training, have pursued further training in intensive care. Regulatory bodies in these settings frequently consider specialty certification as a prerequisite to permanently work in an ICU. However, formal intensive care specialty training programs are rare or nonexistent in resource-limited settings. This lack of specialty education is likely to translate into limited knowledge about the pathophysiology and diagnostic and therapeutic management of critically ill patients [51]. It remains unclear how healthcare professionals working in ICUs in resource-limited settings, where no established regional or national specialty education programs in intensive care medicine exist, should be trained.

The majority of studies from resource-limited settings describe small-scale, focused training courses in individual institutions and pre- and post-course tests of knowledge. Four investigations, one in Ghana [52] and three in Sri Lanka [53, 54, 55], were about regional or national training programs for physicians, ICU nurses, and physical therapists. Dedicated courses in trauma and intensive care- and emergency medicine-related procedures improve knowledge in “best clinical practice” of healthcare professionals working in ICUs in resource-limited settings [56, 57]. Focused training programs that use well-established training models, such as the “Fundamental Critical Care Support” course, facilitated immediate knowledge gain, especially in junior clinicians or those with limited practical experience taking care of critically ill patients [57]. However, data on influences on patient care and long-term knowledge retention are limited. Intensive care-specific courses also demonstrated benefit in allied health professionals in resource-limited settings [55].

A national train-the-trainers program for critical care nursing in Sri Lanka was structured as seven educational blocks over a period of 18 months [53]. Using didactics, simulation, and small group learning, by 2014, this program trained 584 nurses and 29 faculty and allowed local trainers eventually to take command of course directorship. In Ghana, a countrywide continuing medical education course in acute trauma management was developed, and targeting general practitioners in rural hospitals showed significant knowledge retention and critical procedural skills improvement even 1 year after course completion [52].

In locations where institutional, regional, or national courses are unavailable, the use of mobile health technology to facilitate intensive care education and training is of great interest. A pilot study in Haiti showed that non-physician ultrasound learners, linked to ultrasound instructors in the United States via mobile phone video chat technology, can learn how to obtain clinically useful ultrasound images [58]. Validated e-learning methodologies are also in use to enhance critical care education and capacity in Cambodia, although specific outcomes have yet to be declared [59].

Among nearly all available studies from resource-limited settings, a universal theme is partnerships between an institution based in a resource-limited and one in a resource-rich setting. These partnerships, when successful, can evolve from simple facility-to-facility ventures [60] to more longitudinal, systems-based programs [61]. Whether approached vertically (institution-based) or horizontally (systems-based), partnerships also permit local personnel in resource-limited settings to advance knowledge or develop specific skill sets while remaining in their setting. In many cases, the goal is for the resource-limited settings partner to administer the program independently. One successful example of such a horizontally integrated program is the East African Training Initiative, a pulmonary/critical care fellowship training program in Addis Ababa, Ethiopia [29]. In partnership with the Ethiopian Ministry of Health, international professional societies, nongovernmental organizations, and a consortium of universities in Europe and North America, a growing cadre of domestically trained intensive care physicians is now assuming leadership roles in ICU education and clinical care in the country, where only a few years ago no such opportunities existed. A similar project has been established successfully to train nurses in emergency and critical care medicine in Ethiopia [62].

Dedicated and sustainable partnerships at national and international levels incorporating both vertical and horizontal planning, such as the East Africa Training Initiative, require funding, enormous coordination, and sustained buy-in from numerous parties with diverse interests. Consequently, such partnerships are likely less feasible and more expensive to establish; however, they are more likely to have lasting success. Partnerships between individual institutions in resource-limited settings and professional societies in high-income countries are also possible but may lack sustainability. A serious risk to such partnerships is “brain drain,” the emigration of well-trained and specialized healthcare workers from resource-limited to resource-rich settings or from low- and middle-income to high-income countries [40]. Solutions to the “brain drain” are complex and must involve systematic national programs to facilitate return of well-educated emigrated healthcare professionals to their home countries.

Small-scale initiatives, such as intermittent, institution-level ICU training courses like the “Fundamental Critical Care Support” course and others, are least likely to provide long-term benefit given their temporary nature. The teaching content may be difficult to implement in some resource-limited settings. Furthermore, start-up costs for formal courses, especially the ones developed in high-income countries, may exceed local budgets [52]. Focused critical care teaching courses, such as BASIC for Developing Health Systems, which is free and nonproprietary, have been developed and adjusted to resource-limited healthcare systems [63, 64]. Remote education via telemedicine may play a role in the future to reduce costs and improve availability of training options. We could not identify any published safety concerns to the implementation of educational interventions in ICUs in resource-limited settings.

We suggest that all healthcare professionals working in ICUs be specifically trained in the care of the critically ill patient (2C). Unless national or regional specialty training programs in intensive care medicine are available, we suggest that training of ICU physicians, nurses, and allied healthcare professionals occurs through longitudinal, multimodal programs coordinated by partnerships between Ministries of Health, national and international professional societies, nongovernmental organizations, as well as institutions with well-established programs in ICU training (2D). We recommend that such ICU training programs adhere to validated, international standards of intensive care medicine, but that they be adapted to local needs and resources (1C).

3.4 Electricity

Modern ICUs provide around-the-clock, life-sustaining therapies often by the use of electricity-driven machines such as mechanical ventilators, syringe pumps, or extracorporeal therapies. Unexpected power cuts interrupt these therapies and may result in significant harm to or death of critically ill patients. Consistent and reliable electrical power supply is therefore a key logistical requirement of every ICU. However, electricity supply in resource-limited settings is often inconsistent. Major challenges include wide voltage fluctuations, which are deleterious to electricity-driven medical equipment. In many resource-limited settings, electrical power cuts occur on a regular basis and backup electrical sources are frequently absent. In a survey of 231 health centers in 12 African countries, only 35.1% of facilities were reported to have a reliable electricity supply and 56.7% had a backup power source such as a generator. The same survey showed that 16.5% of healthcare facilities did not have any electricity supply [65]. From personal experiences of one of the authors (AP) in 2011, the national public hospital in South Sudan sometimes had to function without electricity for days, limiting hospital services to dispensing medications and making already hot inpatient wards unbearable since fans were not working. Basic clinical services during these periods were performed by flashlight in the evening and not at all at night. Ensuring continuous electric supply is therefore imperative for ICUs to function effectively.

Voltage surges can be attenuated by installing voltage stabilizers into the main electrical supply line(s) of the ICU. Power cuts can be bridged by backup electrical sources, including batteries. Although multiple technical options exist (including solar power sources), fuel- or diesel-driven generators are the most commonly available technical solution in resource-limited settings. It is important to install an electrical backup source that provides adequate electrical power to supply essential medical apparatus in the ICU (e.g., mechanical ventilators, oxygen concentrators, syringe pumps delivering catecholamine agents) and other important machines (e.g., air compressor supporting the pressurized air system). Even when such backup power supplies are available, the time delay between mains power cut and startup of the backup supplies can be a limiting factor. Since even brief power cuts cause electrical equipment to shut down, backup sources that start automatically and immediately are crucial. Using battery-equipped equipment with short (30–60 min) automatic emergency electrical supply can help to mitigate patient harm. If backup sources must be started manually, protocols must be in place to guide ICU workers how to act in response to abrupt interruptions of life-sustaining therapies. Such protocols should ideally focus on three steps in a descending priority: (a) compensation of stopped mechanical ventilators (e.g., by manual bagging), (b) compensation of stopped catecholamine infusions (e.g., by injecting adrenaline into gravity infusions with titration of drops per minute), and (c) compensation of interrupted oxygen supply if oxygen concentrators are used for oxygen supply (e.g., by activating backup oxygen cylinders). It is important that these protocols can be implemented during daylight and nighttime (e.g., availability of functioning flashlights is essential) and that the ICU staff, particularly the nurses and nurse assistants, is adequately trained to implement them. Periodic mock “drills” may help to ensure smooth implementation in the event of an actual event.

Solar power has great potential for ICUs in resource-limited settings, especially given that many of these settings are located in tropical, sunny environments. Solar panel installation was associated with a significant reduction in mean inpatient pediatric mortality in a single-center, retrospective, before-and-after observational study in Sierra Leone [66]. An observational, proof-of-concept study in Uganda also demonstrated improvements in physiologic variables related to respiratory failure after solar panels were installed to power oxygen concentrators in a pediatric ICU [67]. These improvements were consistent even on cloudy days.

The greatest barrier to ensure adequate electrical supply to an ICU in a resource-limited setting is financial. While voltage stabilizers are not costly and are readily available even in resource-limited settings, generators and other backup power sources are expensive, especially with automatic bridging functions. Diesel generators large enough to function through sustained power cuts require steady supply of fuel, which itself can be cost-prohibitive or in short supply. Another commonly faced challenge is maintenance of these systems, which requires technical expertise. Particularly during nighttime when technicians are not readily available, the ICU/hospital staff needs to be familiar with activation of the available backup power source if activation does not occur automatically, a situation that poses logistical and safety challenges when the primary concern is stabilization of critically ill patients. When exposed to extreme weather conditions, generator malfunctions can occur and require skilled local technicians for repair.

A stable electricity supply is an essential infrastructural component of an ICU (ungraded). We recommend that ICUs use voltage stabilizers in case voltage fluctuations endanger the function of electrical medical equipment (1D). We recommend that adequate backup electrical sources be available to bridge power cuts (1C). We suggest that these backup electrical sources take over electricity supply automatically allowing for (near) continuous functioning of life-sustaining medical equipment (2D). We recommend that ICUs with no adequate backup electrical source have protocols in place guiding ICU staff how to bridge life-sustaining therapies during power cuts (1D).

3.5 Oxygen

The World Health Organization considers oxygen fundamentally important and lists it on page one of the Essential Medication List [67]. In 2015, the Lancet Commission on Global Surgery revealed that approximately one quarter of hospitals surveyed in resource-limited countries lack sufficient oxygen supply [68]. This analysis reinforced previous data reporting similar deficiencies in multiple resource-limited settings across the world [65, 69, 70]. Since severity of hypoxemia correlates with mortality [71] and often goes undiagnosed in resource-limited settings [72], ensuring adequate oxygen supply to ICUs in resource-limited settings is of critical importance.

There are three commonly used methods to supply ICUs in resource-limited settings with oxygen: oxygen cylinders, oxygen concentrators, and centralized, piped oxygen systems [73]. Oxygen cylinders provide pressurized oxygen at variably high flow rates but—depending on their size—only do so for a limited period. They do not require electrical power supply but do require pressure regulators and flowmeters to deliver oxygen safely to the patient. Oxygen cylinders are purchased or rented from supply companies and refilled at central distribution points, often making long transportation times to (remote) healthcare facilities necessary. They are generally easy to use, but problems include oxygen leakage from the adaptors (varying from 10 to 70% of the entire cylinder oxygen content), difficulty moving due to size and weight, and sometimes confusion with the local color coding system [74]. Oxygen concentrators are devices which purify oxygen (>90%) from ambient air by absorbing nitrogen onto zeolite membranes. Most concentrators deliver oxygen flow rates of up to 6 L/min. While this is typically enough to deliver oxygen noninvasively to (one to three) moderately unwell neonates or small children, it may not be enough in critically ill older children or adult patients. In contrast to oxygen cylinders, oxygen concentrators depend on a continuous electrical power supply. They also require technical maintenance including regular filter changes. Not all models of oxygen concentrators are technically suitable for sustained use in a tropical environment [75]. Centralized, piped oxygen systems typically deliver pressurized oxygen through wall outlets to bed spaces in the ICU. These systems are supplied by either a liquid oxygen tank, an oxygen concentrator, or several large oxygen cylinders. Proper functioning of centralized oxygen systems depends on adequate engineering expertise and technical maintenance. Specifically, pipeline conditions (presence and severity of gas leak) and diameter (to ensure adequate gas flow), compatible wall outlets, and the presence of shutoff valves must be considered. All three modes of oxygen supply to an ICU require the presence of a backup oxygen source in case of premature emptying (e.g., oxygen cylinders, centralized oxygen system supported by oxygen cylinders), electrical power cuts (e.g., oxygen concentrators), or technical defects (e.g., oxygen concentrators, centralized oxygen system). In many resource-limited settings, oxygen cylinders are used as backup oxygen systems.

Most modern mechanical ventilators depend on pressurized air and oxygen supply. Although oxygen cylinders may be used, doing so may require frequent exchange, particularly at high minute volumes or inspiratory oxygen concentrations. Therefore, centralized, pressurized oxygen and air systems appear most practical to run these types of ventilators. Selected types of mechanical ventilators and the majority of noninvasive (home) ventilators generate their driving pressure by internal air compressors and do not depend on a pressurized gas supply. When using these ventilators, oxygen can be delivered to the Y-piece or the inspiration tubing using either an oxygen cylinder or an oxygen concentrator. Oxygen concentrators are unable to serve as a pressurized oxygen source to run mechanical ventilators but can be used to enrich the oxygen concentration of inspiratory breaths delivered by compressor-driven ventilators. Although the latter practice results in unclear inspiratory oxygen concentrations, the oxygen flow of the oxygen concentrator can be titrated to achieve a desired blood oxygen saturation.

Taking the aforementioned conditions into account, the choice of the most appropriate method to supply an ICU with oxygen depends on site-specific requirements and conditions. A non-ICU study from The Gambia found that cylinders were better than concentrators due to local factors at 10 out of 12 hospitals studied. The authors suggested that concentrators are most advantageous when electrical power is reliable; cylinders may be preferable when power supply is erratic but only when weighed against substantial transportation and delivery costs [76]. Additionally, oxygen concentrators cannot be used to run mechanical ventilators that depend on a pressurized oxygen source as they generate insufficient oxygen flows and pressures.

Installation and maintenance of oxygen systems in an ICU in a resource-limited setting face multiple challenges. While oxygen cylinders are commonly available, also in remote areas, oxygen concentrators are often not locally available and can only be purchased in metropolitan areas or from overseas. Although some materials to set up centralized oxygen systems are ubiquitously available (e.g., copper pipes), key parts, such as wall outlets or liquid oxygen tanks, are not. Copper pipes are also prone to theft [77]. Maintenance of all oxygen supply systems is frequently impeded by financial constraints and a shortage of workers with sufficient training, equipment, and technical experience [76].

A before–after study evaluated the feasibility and outcome effects of improved oxygen delivery on case fatality rates of children with pneumonia admitted to five hospitals in Papua New Guinea. After introduction of pulse oximeters to detect hypoxemia and installation of oxygen concentrators, the risk of death for a child with pneumonia was reduced by 35% [risk ratio 0.65 (CI 95%, 0.52–0.78) compared to the time period before oximeters and oxygen concentrators were made available]. The implementation costs were estimated to be USD $51 per patient treated, USD $1673 per life saved, and USD $50 per disability-adjusted life year averted [78]. Multiple studies from resource-limited settings demonstrated greater cost reductions with oxygen concentrator systems compared to cylinders and generators. In Papua New Guinea, the overall 2-year cost estimate for cylinders, capable of producing 35,000 L/day, was approximately USD $205,000 when compared to three oxygen concentrators (USD $82,400) and an oxygen generator system (USD $390,000), both capable of producing 60,000 L/day, [73]. In The Gambia, annual costs for cylinders at one hospital were USD $152,747 vs. USD $18,742 for concentrators with 24 h availability of grid power [76]. A different 8-year, single-center analysis from The Gambia estimated that installation of oxygen concentrators with a reliable backup power supply saved 51% on oxygen supply costs compared to cylinders (assuming 2 L/min flow rate). When accounting for air leaks and the estimated costs of backup power supply maintenance, the authors estimated total savings of USD $45,000 over 8 years [74]. Given regional variations in supply chains, local engineering and maintenance capabilities, electrical power supply, and other factors, these cost analyses cannot be applied uniformly to other resource-limited settings. A decision support algorithm to determine the best mode of oxygen supply to an individual ICU in a resource-limited setting has been suggested by some authors [76].

Oxygen is an essential medication for critically ill patients, and an adequate oxygen supply is a crucial infrastructural component of an ICU (ungraded). We recommend that ICUs in resource-limited settings choose the type of oxygen supply (concentrators, cylinders, centralized system) based on site-specific conditions and requirements (1B). We suggest that, when feasible, oxygen be supplied by centralized, piped systems to ICUs when mechanical ventilators are used (2D).

3.6 Hygiene

While healthcare-acquired infections are prevalent throughout the world, the burden is highest in resource-limited settings. The World Health Organization estimates that healthcare-associated infection rates are roughly 20 times higher in low- and middle-income countries compared to high-income countries [79]. In ICUs specifically, a meta-analysis reported an overall incidence of ICU-associated infections of 47.9 per 1000 patient days in developing countries. This was three times greater than the prevalence reported from the United States. Surgical site infections were most common, but device-associated infections were highly prevalent as well [80]. Healthcare-associated infections can be transmitted via myriad mechanisms. Many, if not most, can be prevented easily with simple measures. However, lack of hygienic facilities, insufficient training of staff, and lack of administrative oversight (e.g., by hospital-level and national-level infection control measures) are likely to contribute to the deleteriously high rates of nosocomial infection rates in ICUs in resource-limited settings [81].

In line with findings from resource-rich settings, several studies originating in resource-limited settings suggest that hand hygiene is the most effective method of reducing healthcare-acquired infections. Healthcare workers can contaminate hands and medical devices with even a single contact with the patient or his/her immediate surroundings. Contaminant transfer to other patients and healthcare workers is common if hand hygiene is inadequate or not performed [82]. Innumerable challenges to improving hand hygiene in resource-limited settings have been identified, but reasons vary from location to location [83]. Convincing evidence indicates that implementation of multimodal hand hygiene programs can not only improve hand hygiene compliance but also reduce ICU-acquired infection rates. A prospective observational study involving 99 ICUs in 19 resource-limited countries demonstrated a significant 23.1% overall increase in hand hygiene compliance after implementation of a multidimensional hand hygiene program involving administrative support, supply availability, education and training, workplace reminders, process surveillance, and performance feedback [84]. These findings have been replicated in geographically diverse locations including India [85], China [86], and Mexico [87]. A prospective study in six Colombian ICUs demonstrated a significant reduction (12.7% annually during the 4-year study period) in central line-associated bloodstream infections after introduction of a targeted hand hygiene program that included installation of alcohol-based hand rub dispensers adjacent to each ICU bed and regular feedback to healthcare workers [88]. In a Vietnamese tertiary ICU, the combination of hand hygiene and antimicrobial mixing reduced MRSA infections significantly, but not the incidence of the four hospital-acquired gram-negative infections studied.

Several large studies from resource-limited and resource-rich countries reported superior efficacy of hand rubbing with alcohol-based solutions over handwashing with antiseptic soap to reduce hand contamination. A study including three Egyptian ICUs and a renal dialysis unit found that hand rubbing with alcohol-based liquids or gels resulted in a higher reduction of bacterial counts on the hands of ICU staff compared to handwashing with soap and water (77–99% vs. 30%, p < 0.001) [89]. These results are in line with the findings of a randomized controlled trial conducted in French ICUs that observed a 26% reduction in bacterial hand contamination when using alcohol-based hand rub compared to soap and water [90].

During the West African Ebola virus disease outbreak, chlorine-based hand hygiene was commonly used following patient encounters in Ebola treatment centers and in affected communities. This practice is supported by an observational study conducted in Ebola treatment centers in Sierra Leone demonstrating elimination of Ebola virus RNA from contaminated personal protective equipment following treatment with locally produced chlorine solutions [91]. Although this study did not determine whether detection of Ebola RNA on personal protective equipment translated to an increased risk of infection, it can be inferred that reducing contamination is likely to decrease the risk of iatrogenic infection. Although frequent hand hygiene with chlorine-based solution may increase skin irritation, the severity of irritation is little different than with use of soap and water and alcohol-based solutions based on a randomized trial comparing different handwash regimens [92].

Non-sterile, clean examination gloves function as a protective barrier for medical staff who potentially encounter blood, body fluids, or other possibly infectious material. The bacterial bioburden of non-sterile examination gloves is very low [93] and does not differ between newly opened and nearly empty boxes [94]. A randomized controlled trial performed in US ICUs reported that the total bacterial colony counts of gloved hands were not different if hand hygiene was performed before non-sterile examination gloves were donned or not, suggesting that hand hygiene before donning non-sterile gloves is unnecessary [95]. Several studies, however, indicate that contaminated examination gloves can spread bacterial pathogens from healthcare workers to patients [96]. Furthermore, examination gloves do not avoid bacterial contamination of healthcare workers’ hands due to microlesions [97]. Based on these results, the WHO emphasizes that wearing gloves does not replace the need for subsequent hand hygiene [83]. Reuse of medical examination or surgical gloves is commonplace in many resource-limited settings [ref], but the limited studies available suggest that reprocessing and reuse of disposable gloves may be harmful to patients and healthcare professionals. A laboratory-based study from Kenya comparing sterility and physical integrity of reprocessed plastic surgical gloves compared to new, sterilized surgical gloves demonstrated alarmingly reduced physical integrity and sterility of the reprocessed gloves [98].

A before–after study from Pakistan found that the use of (plastic) shoe covers by medical staff and visitors was not helpful in preventing infections with common ICU pathogens or improving the outcome of critically ill patients [99]. Further infection control measures such as fogging and spraying of disinfectants, the use of disinfection or sticky mats, and routine use of face masks or caps by ICU staff or visitors have not been shown to influence infection rates in ICUs [100]. No trials from resource-limited settings on the routine use of gloves, gowns, and aprons to prevent nosocomial or cross infection in critically ill patients were identified. Three large randomized trials from the United States concluded that the universal use of gloves and gowns for all patient contact compared with usual care (adequate hand hygiene and use of gloves in case of contact with blood, body fluids, or other contaminants) did not reduce adverse events or the transmission rate of multiresistant bacteria [101, 102, 103]. Similarly, a Cochrane meta-analysis primarily consisting of studies from resource-rich settings could not identify evidence that overgowns used by staff or visitors are effective in limiting death, infection, or bacterial colonization in infants admitted to neonatal wards or intensive care units [104].

Critically ill patients with known or suspected airborne, droplet, or contact infections require specific hygienic precautions. Although no randomized controlled trials were identified by our literature search, (cohort) isolation of patients with airborne (e.g., Mycobacterium tuberculosis) or droplet infections (e.g., influenza virus, measles, varicella zoster virus, Neisseria meningitidis, coronavirus) in separate rooms is recommended by international and national guidelines both in resource-rich and resource-limited settings [105, 106]. In addition to standard hygienic measures, adequate hand hygiene in particular, the use of masks has been recommended to protect healthcare workers caring for (critically ill) patients with acute respiratory infections. Despite surrogate exposure studies indicating that N95 respirators are associated with less filter penetration and inward leakage than surgical masks, large clinical trials and meta-analyses failed to show that N95 respirators are superior to surgical masks in protecting healthcare workers against influenza during routine care [107, 108, 109]. The Centers for Disease Control and Prevention recommends use of N95 disposable, powered air-purifying, or self-contained breathing apparatus respirators for healthcare workers caring for patients with tuberculosis [110]. In addition to isolation, patients with highly contagious infectious diseases, such as viral hemorrhagic fever or smallpox infection, require specific hygienic precautions. In its latest guidelines on personal protective equipment for use in a filovirus disease outbreak, the World Health Organization recommends the use of face shields or goggles, a fluid-resistant head cover and surgical mask, double gloves, and protective body wear, as well as waterproof aprons and boots, in addition to regular on-duty clothing [111].

A large before–after study in North America showed that the use of full-barrier precautions during insertion of central venous catheters, in addition to adequate hand hygiene when handling catheters, significantly reduced the risk of central venous catheter-related bloodstream infections by up to 66% over the 18-month study period [112]. Full sterile barrier precautions include the use of a cap, mask, sterile drapes, a sterile gown, and sterile gloves following adequate skin preparation and hand hygiene; these components have not been studied separately. Other observational studies confirmed these findings and suggest that the rate of central venous catheter-related bloodstream or other device-related infections can be minimized with the use of appropriate hygienic precautions [113, 114, 115, 116, 117].

No randomized controlled trials from resource-limited or resource-rich settings on the architectural design of ICUs to prevent transmission of microbial pathogens were identified by our search and a previous review of the literature [118]. A prospective study from the United Kingdom reported that isolation of patients colonized or infected with methicillin-resistant Staphylococcus aureus in single rooms or cohorted bays did not reduce cross infection as long as adequate hand hygiene measures were maintained [119]. In contrast, studies suggest that isolation of critically ill patients in rooms that are poorly visualized by staff is likely related to a higher risk of death [120].

National and international guidelines recommend isolation of patients with highly contagious infectious diseases (e.g., tuberculosis, influenza, measles, rubeola infection, varicella zoster infection, hemorrhagic virus disease) or severe immune suppression (e.g., neutropenia, burns, transplant) [106, 110]. Atmospheric pressure in isolation rooms should be controllable to target negative pressure when isolating patients with airborne infections and positive pressure when caring for patients who require protective isolation [106, 110]. A survey-based study of 83 ICUs in resource-limited Asian countries (Bangladesh, India, Nepal, Pakistan, and the Philippines) found that 34 did not have single rooms and 64 did not have negative pressure rooms [121]. A study from Peru reported that upper-room ultraviolet lights and negative air ionization prevented most airborne tuberculosis transmission detectable by guinea pig air sampling [122]. These observations have recently been confirmed by a study from South Africa suggesting that upper-room ultraviolet light is an effective, low-cost intervention for use in tuberculosis infection control in high-risk clinical settings [123]. Regarding the architectural design of new or newly renovated ICUs, consensus-based guidelines published by the Indian Society of Critical Care Medicine recommend the installation of filter-containing central air-conditioning systems with a minimum of six total air changes per room per hour (filter efficiency 99% down to 5 μm); clearly demarcated routes of traffic flow through the ICU; adequate space around and between beds; an adequate number of washbasins; a separate medication preparation area; separate areas for clean, soiled, and waste storage/disposal; and adequate toilet facilities [124]. Alcohol hand rub dispensers are recommended to be placed at the ICU entry and exits and at every bed space and workstation [124].

Despite the clear evidence that the use of alcohol-based hand rub solutions reduces the risk of infection transmission [83], commercial alcohol-based hand rubs are often unavailable in resource-limited settings [82]. A study from Egypt suggests that locally prepared alcohol-based hand rubs are similarly effective to commercial products [89], so local preparation of these products may be feasible and potentially more affordable than purchase of foreign-made products, with recipes readily available [125]. Locally produced chlorine-based handwashing solutions are also effective for decontamination in Ebola virus disease [92], but careful attention must be paid to varying shelf lives among solutions of differing chemical composition, especially in hot environments [126]. Hand hygiene dispensers are commonly used to supply ICU workers in resource-rich countries with alcohol-based hand rub solutions. These dispensers are, however, often unavailable or restricted to the operating theaters in hospitals in resource-limited settings. In addition, they depend on regular refilling by dedicated staff, which may be problematic in understaffed ICUs. In the absence of adequate hand hygiene dispensers, small pocket bottles containing alcohol-based hand rub solutions can be carried, used, and refilled by each ICU worker (Fig. 3.1). A multifaceted hand hygiene program (including upgrading hand hygiene facilities, provision of alcohol-based hand rub at point of care, hand hygiene campaigns, continuous hand hygiene education) not only reduced the incidence of hospital-acquired infections in 17 Vietnamese ICUs but also proved to be cost-effective [127]. Although a cluster-randomized, crossover trial in rural Kenya failed to show differences in surgical site infections between handwashing with alcohol or soap and water (8.3 vs. 8%) in 3133 patients undergoing clean or clean-contaminated surgery, the use of alcohol-based hand rubbing solutions was as feasible and affordable (€4.6 vs. €3.3 per week) as handwashing with soap and water [128]. Religious beliefs do not influence the use of alcohol-based hand rub solutions for hand hygiene but may impact implementation effectiveness [129].
Fig. 3.1

Pocket bottles filled with alcohol-based hand rub for hand hygiene in ICUs in resource-limited settings (Courtesy of Martin W. Dünser, MD)

Respirator masks are often unavailable and underused in resource-limited settings where acute respiratory infections are highly prevalent. Given cost concerns and the unclear scientific benefit of using N95 respirators compared with surgical masks [107], it appears advisable that if N95 respirators are in short supply they should be reserved to protect healthcare workers caring for patients with tuberculosis or other airborne infectious diseases or when caring for patients with droplet-spread infections during aerosol-generating procedures or when caring for patients in very hot and humid environments for long periods when surgical masks may become wet and ineffective (e.g., during the Ebola epidemic). Importantly, cloth masks are prone to moisture retention and poor filtration when reused [130]. As suggested by a randomized controlled trial, they should not replace surgical masks in high-risk situations [131]. One striking challenge during the most recent Ebola virus disease epidemic was the shortage of personal protective equipment faced by healthcare workers caring for diseased patients in West Africa, as global fears of a disease spread rose and resource-rich countries filled their stocks with protective body suits. Since single-use, disposable sterile gowns and drapes, commonly used for invasive procedures in ICUs in resource-rich settings, are expensive and mostly unavailable in resource-limited countries, autoclavable gowns and cloths may be used instead for the majority of common ICU illnesses. For Ebola virus disease, the WHO emphasizes use of disposable personal protective equipment [132].

We recommend that ICUs have available an adequate number of and easily accessible facilities for handwashing/hand hygiene (1A). We recommend hand hygiene after each patient contact with an alcohol-based solution (1A) or, for Ebola virus disease specifically, with chlorine-based solution (1C). In case alcohol-based solutions are unavailable, we recommend using soap and water for handwashing (1A). Alcohol hand rub solutions may be produced locally and carried in small bottles by each healthcare worker (ungraded). We recommend that non-sterile, clean examination gloves for self-protection of medical staff be available (1C). Importantly, gloved hands can equally transmit infectious pathogens and that the use of gloves does not replace the need for subsequent hand hygiene (ungraded). We recommend the availability of masks, caps, sterile gowns, sterile drapes, and sterile gloves for invasive procedures such as insertion of central venous catheters (1A). We recommend that ICUs and hospitals in areas where highly contagious infectious diseases (e.g., tuberculosis, Ebola virus disease) are endemic have rapid access to adequate quantities of personal protective equipment as recommended by the World Health Organization and the Centers for Disease Control and Prevention (1C). We suggest that hospitals develop individual policies and procedures for reuse of disposable personal protective and other medical equipment (2C). When ICUs are renovated or newly built, we suggest compliance with national and international best-practice recommendations on ICU architectural design (2D).

3.7 Equipment

The very nature of an ICU warrants a higher reliance on technical equipment, devices, and other technologies compared to the general medical ward. Irrespective of the geographic location or level of resource limitation, technical equipment constitutes an essential component of ICU-level patient care. What specific types of technical equipment are essential, however, remains undetermined. In resource-limited settings, multiple challenges in terms of equipment procurement and maintenance exist [133]. For example, can the technical equipment run with frequent electric current interruptions? How reliable are the supply chains to obtain or replace the equipment and are local technicians available for repairs? Is donated equipment relevant in the local context and are clinicians educated on how to use it [134]? Given these considerations, resource-limited hospitals and health systems must find and fund equipment purchase or donation sustainably and in the most targeted manner possible.

No large clinical trial has so far shown a reproducible survival benefit related to the use of a single monitoring device in critically ill patients. Monitors improve the care of the critically ill only if healthcare staff make timely and appropriate changes in the therapeutic management based on data from monitors. In view of the fact that pathologic deviations of vital signs such as heart rate, respiratory rate, arterial blood pressure, and arterial oxygen saturation are associated with an increased risk of organ dysfunction and death [135, 136, 137, 138], especially in settings where artificial life support is inconsistently available [139, 140, 141, 142, 143, 144, 145], it appears sensible to measure these parameters continuously or at regular intervals. A prospective, before-and-after interventional study including 447 ICU patients in a Tanzanian university hospital reported that a vital signs-directed therapy improved the acute management of patients with abnormal vital signs. While overall in-hospital mortality was unchanged before and after the intervention, critically ill patients with arterial hypotension experienced a lower post-implementation mortality (69.2 vs. 92.3%, p = 0.02; number needed to treat 4.3) [146].

No conclusive evidence—either from resource-limited or resource-rich settings—was identified to answer the question whether noninvasive or invasive blood pressure measurement is superior in critically ill patients. While a study performed in critically ill patients in an emergency department in a resource-rich country reported inaccuracy of oscillometric blood pressure measurements at hypotensive blood pressure ranges [147], a prospective multicenter study from France found a good discriminative power of noninvasive blood pressure measurements to identify arterial hypotension (mean arterial blood pressure < 65 mmHg) and track arterial blood pressure in 111 patients with shock [148]. A survey among US intensivists observed that 73% and 47% of respondents reported using noninvasive blood pressure measurements in hypotensive patients and patients on vasopressor support, respectively [149].

A recent Cochrane meta-analysis could not identify convincing evidence that the use of pulse oximetry conveys a significant survival benefit in perioperative patients [150]. However, a large, multicenter, before-and-after intervention study from Papua New Guinea observed a survival benefit associated with the systematic use of pulse oximetry to monitor and treat children with pneumonia, when coupled with a reliable oxygen supply [78]. In settings where blood gas analyzers are unavailable, the plethysmographic oxygen saturation relative to the inspiratory oxygen concentration (SpO2/FiO2 ratio) can be used for decision-making and continuous monitoring [151, 152].

A systematic review of the literature evaluated the benefit associated with the use of portable ultrasound devices in low- and middle-income countries [153]. Although several reports were identified describing the successful diagnosis, triage, and management of patients with complex, life-threatening conditions with the use of point-of-care ultrasound, no randomized controlled trial has so far evaluated the impact of ultrasound-guided diagnosis and treatment in resource-limited settings. A Haitian–US study demonstrated that tele-mentoring of non-physicians performing ultrasound in a resource-limited setting was feasible and adequate to make clinical decisions in the majority (89%) of cases [58].

Our literature search did not identify any randomized controlled trials evaluating the effects of mechanical ventilators on mortality in critically ill patients both in resource-limited and resource-rich settings. However, mortality of patients with hypoxemia who do not receive mechanical ventilatory support is extremely high, suggesting that mechanical ventilation associates with a survival benefit [152]. Observational evidence from ICUs in Vietnam suggest that general intensive care measures, including mechanical ventilation, can improve clinical outcomes [154, 155]. A structured ICU training program that included modules on mechanical ventilation improved overall ICU mortality in two of three ICUs in India, Nepal, and Bangladesh [156].

Reports from India and Africa confirm the feasibility of noninvasive ventilation in resource-limited settings [157, 158]. A randomized controlled trial including four rural hospitals in Ghana found that continuous positive airway pressure application by local nurses significantly reduced respiratory rate and was not associated with complications in 70 children with respiratory distress [159]. A randomized controlled trial that was stopped early including 225 Bangladeshi children with severe pneumonia and hypoxemia found that the use of bubble continuous positive airway pressure reduced the risk of treatment failure and death compared with standard low-flow oxygen therapy [160]. These results were confirmed by studies from India and Malawi [161, 162]. No randomized controlled trials on the use of end-tidal carbon dioxide monitoring in resource-limited settings were identified. Studies from both resource-limited and resource-rich settings prove that end-tidal carbon dioxide measurement is a reliable technique to verify endotracheal tube placement and an adequate tool to monitor mechanical ventilation [163, 164, 165]. Although differences between arterial and end-tidal carbon dioxide values are common and vary individually [166, 167], the trends over time appear helpful to guide mechanical ventilation, particularly when arterial blood gas analyzers are unavailable [168, 169, 170].

Renal replacement therapy improves short- and long-term survival of patients with severe acute renal injury [171, 172]. Recommendations regarding renal replacement therapy for critically ill patients in resource-limited settings are discussed in another chapter in this book [173].

Abnormal blood glucose levels and increased blood lactate levels have both been associated with increased mortality in the critically ill in resource-limited and resource-rich settings [174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184]. A Ugandan multicenter study recorded an incidence of hypoglycemia of 16.3% among 532 sepsis patients. In this study, hypoglycemia was an independent risk factor for in-hospital mortality and could not be adequately predicted by clinical examination [185]. Hypoglycemia is a well-known complication of malaria, particularly in children [186] and those treated with quinine [187]. Although our literature search did not reveal a randomized controlled trial showing that measurement of blood glucose is associated with improved outcome, it is sensible to assume that detection of dysglycemic episodes is associated with improved care. While studies from resource-limited settings suggest that results of point-of-care methods to measure blood glucose levels are closely correlated with those of laboratory measurements [188, 189], some studies from resource-rich settings have highlighted inaccuracies of point-of-care devices in lower blood glucose ranges [190]. A recent international multicenter study, however, demonstrated that bedside blood glucose monitoring systems were acceptable for use in critically ill patient settings when compared to a central laboratory reference method [191]. Similarly, lactate levels as measured by a point-of-care blood lactate analyzer reliably predicted mortality in Ugandan sepsis patients [179], as well as febrile children in Tanzania [180]. No randomized controlled trials from resource-limited settings were identified evaluating the outcome effects of lactate measurements or lactate-guided interventions in critically ill patients. Although limited by insufficient information size, a meta-analysis with sequential analysis of randomized controlled trials originating in resource-rich countries suggested that the use of lactate clearance as a goal to guide resuscitation was associated with a reduction in the risk of death in adult patients with sepsis [192].

Similar to glucose and lactate measurement, our literature search failed to find studies demonstrating improved outcomes for arterial or venous blood gas measurement. A Swiss prospective observational study demonstrated that lower pH was an independent predictor of 12-month mortality in emergency department patients presenting with dyspnea, but arterial blood gas analysis itself had very limited diagnostic value [193]. According to international consensus definitions developed in high-income countries, measurement of the partial pressure of oxygen is required to diagnose the acute respiratory distress syndrome (ARDS) [194]. Similar recommendations have been made for sepsis-induced ARDS diagnosis in resource-limited settings [152], supported by observational evidence to show that patients with increasing severity of ARDS as determined by the arterial partial pressure of oxygen to fraction of inspired oxygen ratio have higher mortality and higher noninvasive ventilation failure rates [195].

The availability of vital signs monitors, mechanical ventilators, renal replacement devices, and point-of-care tools in ICUs varies substantially between resource-limited regions [196, 197, 198, 199, 200, 201, 202, 203, 204]. Several studies suggest that hospitals in middle-income countries and metropolitan areas of low-income countries have more technical equipment available than healthcare facilities in low-income countries and rural areas [200, 201, 202, 203, 204]. Except for remote areas [202, 205], the availability of vital signs monitors and glucometers appears consistently high; point-of-care laboratory facilities and renal replacement equipment are strikingly unavailable in certain areas [202, 203, 204]. Common challenges of installing and maintaining technical equipment in ICUs in resource-limited settings are high investment costs depending on the regional availability of medical retailers, the need for reliable electrical power supply, disposable materials (e.g., ECG electrodes, printer paper), as well as technical maintenance and repair in case of device malfunction or breakdown [206]. A mathematical model based on cost-effectiveness threshold and the results of previous studies concluded that the perioperative use of pulse oximeters is cost-effective in resource-limited settings [207].

In addition to challenges faced with installation and maintenance of vital signs monitors and as previously described, mechanical ventilators additionally require a reliable oxygen and/or (pressurized) gas supply as well as structured training of healthcare staff. In contrast to invasive mechanical ventilation, noninvasive mechanical ventilation appears to be feasible and safe in resource-limited settings after short, structured education of ICU staff [159, 208]. A study from India even reported that the use of noninvasive mechanical ventilation to treat patients with acute exacerbations of chronic obstructive pulmonary disease in non-ICU wards was both feasible and cost-effective [209]. Although continuous positive airway pressure and/or high-flow oxygen devices may be implemented in clinical practice with relatively low implementation costs and a concise staff training, its maintenance may consume high amounts of oxygen, particularly when used at high inspiratory oxygen concentrations in adults. Oxygen requirements in children are substantially lower due to lower minute ventilation.

Whereas both the implementation and maintenance costs to run point-of-care glucometers in the ICU are low, other point-of-care laboratory facilities (e.g., blood gas analyzers, including lactate measurements) critically depend on the local availability of (costly) supply materials (e.g., reactive agents), reliable electrical supply, as well as regular maintenance by skilled laboratory or medical technicians. Although cassette-based blood gas analyzers show a comparable accuracy to traditional blood gas analyzers [210] and require less technical maintenance, they are associated with much higher costs, particularly when large amounts of blood samples are analyzed. Separate point-of-care devices measuring blood lactate levels have been suggested as cheaper alternatives to blood gas analyzers in resource-limited settings [189, 211]. Moreover, availability of blood gas analyzers is severely limited [212], and contemporary evidence from resource-rich and resource-limited settings suggest that arterial blood gas measurement may not be necessary to diagnose and to improve outcomes for ARDS [137, 213].

Acquisition of technical equipment should be guided by local availability and feasibility of routine maintenance (ungraded). We recommend that ICUs have basic vital signs monitors (including electrocardiogram, respiratory rate, oscillometric blood pressure, and pulse oximetry) available for each ICU bed (1C). We recommend that ICUs have one or more mechanical ventilators available (1C). These mechanical ventilators should also deliver noninvasive ventilatory modes, measure tidal volume and airway pressures, and support oxygen delivery (1B). We suggest that ICUs that provide invasive ventilatory support have facilities available to measure end-tidal carbon dioxide (2C) and to perform blood gas analysis (2C). We recommend that ICUs have point-of-care capabilities for measuring blood glucose (e.g., glucometers) (1B). We recommend that ICUs have capabilities for measuring blood lactate levels (1B). We suggest that ICUs have available point-of-care ultrasound devices (2C) and that key clinical staff undergo formal ultrasound training (2C).

3.8 Quality

The sepsis and intensive care literature is replete with examples of poor quality care [51]. The great challenge is how best to improve quality of care for critically ill patients in resource-limited settings when faced with countless financial, resource, and administrative constraints. A significant limitation is that sparse epidemiologic data detailing sepsis presentation and management in resource-limited settings have been published [214]. Without these data, it is difficult, if not impossible, to identify effective interventions that work at the population level. Various authors have developed general roadmaps for the future [215], but specific interventions demonstrating convincing improvements in intensive care in resource-limited settings are still lacking.

Regular documentation of the patient’s history of care is a medicolegal requirement in almost all healthcare systems. Medical records are the integral repository of the patient’s disease course, healthcare planning, and documentation of communications with other healthcare providers, the patient, and his/her family. Furthermore, medical records are used to assess compliance of care with institutional, national, or international guidelines and regulations. Although electronic data documentation has become commonplace in many ICUs in resource-rich settings and resulted in improved accuracy and legibility of documents, a meta-analysis failed to show that implementation of electronic medical records has a substantial effect on relevant ICU outcomes such as mortality, length of stay, or costs of care [216]. Although introduction of a daily goal form can improve communication between ICU healthcare professionals and possibly reduce ICU length of stay [217, 218, 219, 220, 221], a large, randomized, controlled, multicenter trial from a resource-limited setting failed to reproduce beneficial effects of a multifaceted quality improvement intervention with daily checklists, goal setting, and clinician prompting on in-hospital mortality of critically ill patients [222].

A multitude of quality improvement methods to implement and translate scientific evidence into clinical care have been published. Education, audit and feedback, protocols, bundles of care, and checklists are common tools studied to improve the quality of ICU and sepsis care. Most reports originate in resource-rich settings. A large nationwide educational effort to implement international sepsis guidelines using two care bundles was associated with improved guideline compliance and lower hospital mortality in Spain [223]. These results were confirmed by several other reports [224, 225], indicating that a higher compliance with international sepsis guidelines was directly and significantly associated with improved survival [226, 227, 228]. A large prospective interventional study in Uganda found that a bundled protocol to implement early monitored sepsis management improved survival of patients with severe sepsis in two hospitals [229]. A small observational cohort study in Haiti demonstrated improved process measures in septic care after implementation of a simplified sepsis protocol developed by the World Health Organization, although there was no mortality effect [230]. Similarly, two hospital-wide, protocol-based quality improvement programs significantly reduced the rate of catheter-associated urinary tract and catheter-associated bloodstream infections in Thailand [231, 232]. Checklists have been implemented successfully to optimize sepsis care [233] and high-risk procedures [234] in critically ill patients in resource-rich settings. A large international quality improvement project based on checklists to minimize preventable deaths, disability, and complications in critically ill patients is underway and includes several ICUs based in resource-limited settings [235].

Benchmarking is another accepted quality improvement concept in healthcare to identify performance gaps and to improve the quality of care based on anonymous comparison of quality indicators with other institutions and services. Although multiple benchmarking projects and ICU registries exist in resource-rich countries, no evidence currently supports that they translate into improved patient outcomes. A reduction in the standardized mortality ratio in Dutch ICUs occurring concurrently with the Dutch national benchmarking activities suggests that benchmarking of ICU performance indicators is a promising tool to improve quality of ICU care [236]. Quality and performance indicators of ICUs have been published by national and international societies in both resource-rich and resource-limited settings [237, 238, 239]. While several national and international ICU registries and benchmarking projects exist in resource-rich countries [240], only a few national ICU registries exist in resource-limited settings, such as Sri Lanka [241] and Malaysia [242]. Similarly, internal and external clinical audits have been suggested as promising methods to improve quality of ICU care in resource-rich countries [243, 244], but consistent data from resource-limited settings are lacking.

Although implementation of protocols, bundles, and checklists into clinical practice requires a variable amount of funding, preliminary results of studies from resource-limited settings suggest that these interventions may prevent adverse events and complications [231, 232]. A delicate and important challenge of implementing protocols, care bundles, and checklists into clinical practice in ICUs in resource-limited settings is the lack of safety data. Different disease pathologies, as well as absent treatment options (e.g., airway protection and mechanical ventilation), could well explain why certain interventions that were shown to improve patient outcome in resource-rich settings increased morbidity and mortality in resource-limited settings [215, 245, 246, 247]. This underlines the urgent need to test the efficacy and safety of adjusted care bundles and protocols to improve care of critically ill and sepsis patients in settings where resources are constrained [215, 248]. Another consideration is that quality control measure implementation may divert financial resources from clinical care. Although long-term reduction savings may occur due to avoidance of adverse events, the up-front expenditure may prove burdensome.

We recommend maintaining patient records and ICU documentation in accordance with national regulations and requirements (1D). We suggest that ICUs develop locally applicable bundles, protocols, and checklists to improve quality of care (2C). We suggest that ICUs systematically collect quality and performance indicators and participate in national/international benchmarking projects (2C).

3.9 Conclusions

We provide a series of simple, pragmatic recommendations for optimizing ICU infrastructure and organization in resource-limited settings. Understanding the great variability of technical, material, and human resources within and between these environments, each institution must determine the utility of implementing these recommendations based on local capabilities. Given the paucity of evidence, there remains a clear need for additional studies from resource-limited settings.

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© The Author(s) 2019

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Authors and Affiliations

  • Alfred Papali
    • 1
    • 2
  • Neill K. J. Adhikari
    • 3
  • Janet V. Diaz
    • 4
    • 5
  • Arjen M. Dondorp
    • 6
    • 7
    • 8
  • Martin W. Dünser
    • 9
    Email author
  • Shevin T. Jacob
    • 5
    • 10
    • 11
  • Jason Phua
    • 12
  • Marc Romain
    • 13
  • Marcus J. Schultz
    • 6
    • 14
    • 15
  1. 1.Division of Pulmonary and Critical Care MedicineAtrium HealthCharlotteUSA
  2. 2.Division of Pulmonary and Critical Care, Institute of Global HealthUniversity of Maryland School of MedicineBaltimoreUSA
  3. 3.Sunnybrook Health Sciences CentreUniversity of TorontoTorontoCanada
  4. 4.Pacific Medical CenterSan FranciscoUSA
  5. 5.World Health OrganizationGenevaSwitzerland
  6. 6.Faculty of Tropical MedicineMahidol UniversityBangkokThailand
  7. 7.Academic Medical CenterUniversity of AmsterdamAmsterdamThe Netherlands
  8. 8.Nuffield Department of Clinical Medicine, Oxford Centre for Tropical Medicine and Global HealthUniversity of OxfordOxfordUK
  9. 9.Department of Anesthesia and Intensive Care Medicine, Kepler University HospitalJohannes Kepler University LinzLinzAustria
  10. 10.University of Washington School of MedicineSeattleUSA
  11. 11.Liverpool School of Tropical MedicineLiverpoolUK
  12. 12.National University HospitalSingaporeSingapore
  13. 13.Hadassah–Hebrew University Medical CenterJerusalemIsrael
  14. 14.Department of Intensive CareAcademic Medical CenterAmsterdamThe Netherlands
  15. 15.Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A)Academic Medical CenterAmsterdamThe Netherlands

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