Internal and Emergency Medicine

, Volume 13, Issue 3, pp 359–365 | Cite as

Noninvasive auto-titrating ventilation (AVAPS-AE) versus average volume-assured pressure support (AVAPS) ventilation in hypercapnic respiratory failure patients

  • Gul Gursel
  • Avsar Zerman
  • Burcu Basarik
  • Kamil Gonderen
  • Muge Aydogdu
  • Serriyye Memmedova
IM - ORIGINAL
  • 79 Downloads

Abstract

Auto-titrating noninvasive ventilation (NIV) has been developed as a new mode applying variable expiratory-positive airway pressure (EPAP) in addition to variable inspiratory pressures (IPAP), both to deliver targeted tidal volume (VT) and to eliminate upper airway resistance. The purpose of this study is to evaluate whether NIV with auto-titrating mode will decrease more PaCO2 within a shorter time compared to volume-assured mode in hypercapnic intensive care unit (ICU) patients. The hypercapnic respiratory failure patients treated with average volume assured pressure support- automated EPAP mode (group1) were compared with those treated with average volume-assured pressure support mode (group2). Two groups were matched with each other according to baseline diagnoses, demographic characteristics, arterial blood gas values, target VT settings and daily NIV usage times. Built-in software was used to gather the ventilatory parameters. Twenty-eight patients were included in group 1, and 22 in group 2. The decrease in PaCO2 had been achieved within a shorter time period in group 1 (p < 0.05). This response was more pronounced within the first 6 h (mean reduction in PaCO2 was 7 ± 7 mmHg in group 1 and 2 ± 5 mmHg in group 2, p = 0.025), and significantly greater reductions in PaCO2 (18 ± 11 mmHg in group 1 and 9 ± 8 mmHg in group 2, p = 0.008) and plasma HCO3 levels (from 32 to 30 mEq and from 35 to 35 mEq, p = 0.007) took place within first 4 days. While mean IPAP was similar in both groups, maximum EPAP, mean VT and leak were significantly higher in group 1 than in group 2 (p < 0.05). Results of this preliminary study suggest that, this new auto-titrating NIV mode may provide additional benefit on volume-assured mode in decreasing PaCO2 more efficiently and rapidly in hypercapnic ICU patients.

Keywords

AVAPS-AE Hypercapnic respiratory failure Noninvasive ventilation ICU Emergency medicine 

Notes

Author contribution

Prof. Dr. Gul Gursel was the guarantor of the study, responsible from the planning and organization of data, controlling of data collection, analyzing the results of data, interpreting the results and writing of the manuscript. Dr. Avsar Zerman, Dr. Burcu Basarik, Dr. Kamil Gonderen, Dr. Muge Aydogdu and Dr. Seriyye Memmedova are responsible for the application of noninvasive mechanical ventilation in ICU and recording of the necessary data, analysis of the software results, entering data to SPSS programme for statistical analysis and also writing of the manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest. All authors disclose any financial support or relationships that may pose conflict of interest. This includes any financial arrangements authors have with a company whose product figures prominently in the submitted manuscript or with a company making a competing product. All authors state explicitly that they have no any potential conflicts.

Statement of human and animal rights

Human rights are followed in this study.

Informed consent

The Local Ethics Committee approved this study (No: 894-2015) and exempted it from the informed consent requirement because researchers accessed an anonymized database retrospectively for this analysis.

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Copyright information

© SIMI 2018

Authors and Affiliations

  1. 1.Department of Pulmonary Critical Care MedicineGazi University School of MedicineBesevlerTurkey

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