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

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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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.

OriginalsprogEngelsk
TidsskriftArchives of Orthopaedic and Trauma Surgery
Vol/bind139
Udgave nummer5
Sider (fra-til)709-716
Antal sider8
ISSN0003-9330
DOI
StatusUdgivet - 2019

ID: 56762579