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06.03.2019 | Knee Arthroplasty | Ausgabe 5/2019

Archives of Orthopaedic and Trauma Surgery 5/2019

Simultaneous vs staged bilateral total knee arthroplasty: a propensity-matched case–control study from nine fast-track centres

Zeitschrift:
Archives of Orthopaedic and Trauma Surgery > Ausgabe 5/2019
Autoren:
M. Lindberg-Larsen, F. T. Pitter, H. Husted, H. Kehlet, C. C. Jørgensen, The Lundbeck Foundation Centre for Fast-Track Hip and Knee Replacement Collaborative Group
Wichtige Hinweise
The members of the Lundbeck Foundation Centre for Fast-Track Hip and Knee Replacement Collaborative Group are given in the acknowledgement section.

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Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Introduction

Limited data exist on patient safety after simultaneous vs staged bilateral total knee arthroplasty (TKA) in matched groups. Hence, the aim of this study was to compare length of stay (LOS), in-hospital complications, 30-day readmissions and mortality after simultaneous and staged bilateral TKA in matched patients.

Patients and methods

A retrospective case–control study of prospectively collected data in nine centres from February 2010 to November 2015. Propensity scores (PS) were used to match simultaneous and staged (1–6 months between stages) bilateral TKA patients with prospectively collected patient characteristics from the Lundbeck Foundation Centre for Fast-track THA and TKA Database. 30-day follow-up was acquired from the Danish Patient Registry and patient records.

Results

A total of 344 (47.1%) simultaneous and 386 (52.9%) staged bilateral TKA procedures were performed. PS matching was possible in 232 simultaneous and 232 staged bilateral TKA patients. LOS was median 4 days (IQR 3–5) after simultaneous and cumulated 4 days (IQR 4–6) after staged procedures. The in-hospital complication rate was 15.5% after simultaneous vs 7.3% (p = 0.004) after staged procedures. Two cases (0.9%) of venous thromboembolic events were found in each group. Eight patients (3.4%) were re-operated after simultaneous vs one patient (0.4%) after staged bilateral TKA (p = 0.037). The 30-day readmission rate was 8.6% after simultaneous vs 5.6% after staged procedures (p = 0.281). No patients died in either group.

Conclusions

We found no significant differences in 30-day readmission rates and mortality between simultaneous and staged bilateral TKA, but the in-hospital complication rate and re-operation rate was higher after the simultaneous procedure calling for further matched investigations in larger cohorts.

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