Total Joint Arthroplasty in Patients with Inflammatory Rheumatic Diseases
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Since its introduction, total joint arthroplasty (TJA) has improved the quality of life of patients with degenerative joint disorders. In the last decades, a number of conventional and biological disease-modifying antirheumatic drugs have become available for the treatment of patients with inflammatory rheumatic diseases (IRD), leading to a reduction in the need to undergo TJA. However, TJA is still frequently performed in IRD patients. Both rheumatologists and orthopedics should be aware that patients with IRD have a peculiar perioperative risk profile due to disease-related, patient-related, and surgery-related risk factors. On the basis of current evidence, TJA is a safe procedure for IRD patients as long as an accurate risk stratification and a multidisciplinary approach are applied. We here describe the current strategies for an appropriate surgical management of osteoarthritis in IRD patients and the fascinating opening perspectives that surgeons and clinicians may expect in the future.
KeywordsInflammatory rheumatic diseases Psoriatic arthritis Rheumatoid arthritis Rheumatology Systemic lupus erythematosus Total joint arthroplasty
Aspects Related to the Underlying Disease
Infections are a dreaded complication of TJA, resulting in long pharmacological therapies and worse clinical outcomes. A higher disease activity has been associated with a higher probability of developing infections. Despite the elevated risk of infection, there is currently no evidence supporting the use of perioperative protocols different from the general population, but specific attention is recommended in postoperative follow-up and wound healing [4, 5, 6]. An interesting aspect is the fear of infection related to previous corticosteroid injections. Recent comforting data from systematic reviews confirm that this fear is not actually supported by evidence .
Patients with IRD also have a higher risk of experiencing cardiovascular events compared to the general population [8, 9]. The preoperative assessment of patient-related medical risk factors should include obesity, malnutrition, hyperglycemia, uncontrolled diabetes mellitus, chronic renal failure, smoking, and alcohol abuse . These factors have proved to contribute to the risk of postoperative infections following TJA in IRD patients . Conventional risk factors are more common in RA but do not fully explain the increased cardiovascular risk, which seems specifically related to chronic inflammation that may lead, among other mechanisms, to the reduction of high density lipoprotein levels and oxidation of low density lipoproteins with pro-inflammatory effects . Considering the low risk of life-threatening bleeding with aspirin, if no major contraindications are present, the maintenance of aspirin is feasible and recommended in all IRD patients who are already in treatment .
Recently, a multi-biomarker disease activity (MBDA) algorithm has been developed combining 12 biomarkers of disease activity among which are pro-inflammatory cytokines and other protein biomarkers implicated in the pathophysiology of joint disease in RA . Higher MBDA scores are associated with a higher risk of infections, myocardial infarction, and coronary heart disease ; therefore, the use of MBDA score to stratify patients in a perioperative setting in the future could replace the assessment of CRP levels and erythrocyte sedimentation rate. Similarly, in SLE, a combined soluble mediator score incorporating 52 analytes was studied in order to improve prediction of SLE flares .
A higher risk of venous thromboembolism (VTE) has also been reported as a consequence of chronic inflammation and endothelial activation, which increase tissue factor expression and inhibit endogenous anticoagulants and fibrinolysis . Major orthopedic procedures, especially in the lower limb, represent a well-known risk factor for VTE in the weeks following surgery, and a delicate balance between thrombotic and bleeding events has to be found in IRD patients [18, 19]. In preoperative cardiovascular risk stratification of IRD patients, the presence of antiphospholipid antibodies (aPL) should also be determined . However, it is known that a subset of patients with persistent aPL positivity do not ever develop VTE events in their lifetime. Antibodies directed against domain I of β2-glycoprotein I (GPI) highly correlate with thrombosis, supporting the hypothesis that these antibodies are a clinically relevant subset of anti-β2GPI antibodies associated with antiphospholipid syndrome (APS) [21, 22, 23]. In the future, these antibodies may be used as routine biomarkers in perioperative risk stratification. Practical management strategies to prevent potential perioperative complications in patients already treated with anticoagulants should include ensuring correct hydration of the patient, reducing to a minimum the periods without anticoagulant drugs, and encouraging postoperative mobilization as early and as much as tolerated, together with the use of antithrombotic stockings, if not contraindicated [6, 24].
Although the role of periodontal disease as a risk factor for periprosthetic joint infection is still controversial , there is an established association between periodontal disease and IRD and future studies should address the importance of an odontostomatologic evaluation prior to TJA . IRD patients have a higher risk of depression and other psychological diseases due to high tension and low self-esteem followed by the perceived impact of RA, fatigue, passive coping, pain, and physical disability . Considering the relationship between personality psychology and expected clinical outcomes, counselling with a psychological team before surgery is recommended . Future studies should also evaluate non-pharmacological management of these patients.
Finally, models for risk stratification will become more and more accurate and personalized thanks to the most recent technologies aimed at analyzing large volumes of data sets regarding patient characteristics and surgical procedures, with the possibility to share data among different healthcare institutions .
Aspects Related to Therapies
The higher risk of infection in the perioperative period in IRD patients could be associated with the underlying treatment . Evidence from RA studies demonstrates that patients on bDMARDs (both TNF inhibitors and non-TNF biologics) have an increased risk of serious infections compared with patients on csDMARDs, with no differences across bDMARDs . However, the risk of flares in the postsurgical period should be carefully evaluated in IRD patients because a disease flare may require a rise in corticosteroid dosage, thus increasing the risk of infection. Traditionally, a suspension of bDMARDs of at least two half-lives has been recommended so far. However, half-life may not correspond to the duration of the immunosuppressant effect as much as the dosing cycle. Therefore, current guidelines recommend to withhold biologics on the basis of the dose interval and tofacitinib, a tsDMARD targeting Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling, 7 days before surgery, respectively . A very recent case series of Japanese patients with RA treated with tofacitinib undergoing orthopedic surgery has been published . No serious perioperative infections were reported in any patient during a follow-up of at least 6 months, thus confirming the safety of the drug.
As a result of the low risk of infection, current evidence supports the view that continuing csDMARDs such as methotrexate, sulfasalazine, hydroxychloroquine, and azathioprine is a safe option in RA patients without relevant comorbidities . The use of corticosteroids with a dosage above 15 mg daily is associated with a higher risk of infection. On the basis of current evidence, it is advisable to carefully taper the dose of corticosteroids to below 20 mg prednisone daily and to abandon the practice of giving “stress dose steroids” because there is no evidence of a reduced risk of adrenal insufficiency against a possible increased risk of infection . The use of NSAIDs should be evaluated in IRD patients in the perioperative period, because it is related to an increased cardiovascular risk and may affect wound and bone healing in association with corticosteroids and DMARDs . An effective alternative in the days after surgery could be the association of paracetamol with opioids .
Inherited differences in drug metabolism dramatically affect drug response and adverse effects in each subject. It is tempting to hypothesize that decreasing costs of genome sequencing and growing awareness of the association between specific gene polymorphisms and drug responses will lead in the near future to evidence-based generated data that can be applied in perioperative care, in particular for pain and anesthetic drug management, but also for antirheumatic drugs [35, 36, 37].
Aspects Related to Surgery
TJA in IRD is a challenge for surgeons, whose responsibility is to choose the most effective and less invasive technique for these patients . Many new opportunities are currently available, such as computer-assisted surgery, robotic surgery, patient-specific instrumentations, and fast-track rehabilitation protocols. Computer-assisted surgery was introduced in clinical practice at the end of 1990s, and its clinical application can potentially have a specific advantage in IRD patients. TJA performed with this technique does not require intramedullary guides, reducing blood loss and local trauma . These advantages have been also described in patient-specific instrumentations . Robotic surgery represents for many aspects the future of TJA. It theoretically combines the advantages of computer navigation with the robotic control of all the surgical steps regarding the bone cuts. This technique has been introduced only few years ago and the preliminary studies report good results, but actually insufficient literature has been published regarding clinical and biomechanical outcomes . Fast-track rehabilitation protocols represent the state of the art of postoperative care in patients undergoing total joint replacement, and combined with perioperative enhanced recovery after surgery (ERAS) protocols can give to patients an early recovery and better clinical outcomes, especially in the first postoperative months as reported by many studies .
The management of DMARDs and other drugs in IRD patients undergoing TJA is debated among orthopedic surgeons and rheumatologists, thus leading to uncertainty in decision-making. TJA has a pivotal role in the management of IRD patients and quality of life improvement. Overall, evidence supports the view that TJA can be performed safely in IRD patients, as long as a careful risk evaluation is performed on a multidisciplinary basis.
No funding or sponsorship was received for this study or publication of this article.
All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.
Riccardo CompagnonI, Roberta GualtierottI and Pietro Randelli have nothing to disclose.
Compliance with Ethics Guidelines
This article is based on previously conducted studies and does not contain any studies with human participants or animals performed by any of the authors.
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