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COPD as a risk factor of the complications in lower limb arthroplasty: a patient-matched study

Authors Klasan A, Dworschak P, Heyse TJ, Ruchholtz S, Alter P, Vogelmeier C, Schwarz Patrick

Received 4 January 2018

Accepted for publication 26 April 2018

Published 21 August 2018 Volume 2018:13 Pages 2495—2499


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Richard Russell

Antonio Klasan,1 Philipp Dworschak,1 Thomas Jan Heyse,1 Steffen Ruchholtz,1 Peter Alter,2 Claus Franz Vogelmeier,2 Patrick Schwarz2

1Department of Orthopedics and Traumatology, University Hospital Marburg, Marburg, Germany; 2Department of Pulmonary and Critical Care Medicine, University Hospital Marburg, Marburg, Germany

Purpose: A relevant proportion of patients undergoing joint replacement surgery for the treatment of osteoarthritis exhibit COPD. This coincidence may result from an increased prevalence of both the diseases in elderly patients. In this study, COPD, which is known to be associated with a variety of comorbidities, and its potential interactions, eg, mediated via systemic inflammation, are discussed. The purpose of the present study was to identify the role of COPD as an independent risk factor for complications after total knee and hip arthroplasty.
Patients and methods: In a monocentric patient cohort of 2,760 arthoplasties, propensity score matching was done using the following factors: sex, age, replaced joint, American Society of Anesthesiologists’ score, body mass index, hypertension, chronic heart disease, anticoagulation, diabetes mellitus, chronic renal deficiency, and actual smoking status to create 224 pairs. Both the pre-matched differences and the results after propensity score matching were statistically analyzed with p≤0.05 being defined as statistically significant.
Results: All confounders were eliminated after matching. Preoperatively measured C-reactive protein and leukocytes were higher in the COPD group (p<0.001; p=0.01, respectively). Intensive care unit admission was higher for COPD patients (p=0.023). Pneumonia occurred in patients with COPD only (p=0.024). There was a trend (not significant) toward a higher rate of wound infections, increased transfusion of red blood cells, and a prolonged hospital stay in patients with COPD.
Conclusion: COPD was associated with an increased length of hospital stay, a higher risk of pneumonia and wound infection, higher general complications, and an increased need for red blood cell transfusion. It is thus recommended to enhance the implementation of pneumonia prevention programs on surgical wards.

Keywords: COPD, pneumonia, arthroplasty, complication, transfusion, comorbidity

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