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Published in: Journal of Orthopaedic Surgery and Research 1/2019

Open Access 01-12-2019 | Periprosthetic Fracture | Research article

Risk analysis and clinical outcomes of intraoperative periprosthetic fractures: a retrospective study of 481 bipolar hemiarthroplasties

Authors: Petri Bellova, Hinnerk Baecker, Sebastian Lotzien, Marvin Brandt, Thomas A. Schildhauer, Jan Gessmann

Published in: Journal of Orthopaedic Surgery and Research | Issue 1/2019

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Abstract

Background

Intraoperative periprosthetic fractures (IPF) are a well-described complication following hip hemiarthroplasty. Our aims were to identify risk factors that characterize IPF and to investigate postoperative mobility.

Methods

We retrospectively reviewed 481 bipolar hemiarthroplasties for displaced femoral neck fractures; of which, 421 (87.5%) were performed without cement, from January 2013 to March 2018. Data on the patients’ demographics, comorbidities, femoral canal geometry (Dorr canal type, Canal Flare Index), surgeon’s experience (junior vs. senior surgeon), and timing of surgery (daytime vs. on-call duty) were obtained. In patients with intraoperative fractures, further information was obtained. Patient mobility was assessed using matched-pair analysis. Mobility was classified according to the NHFD mobility score. The chi-square test, Fisher’s exact test, and Fisher-Freeman-Halton exact test were used for comparison between categorical variables, while the Mann-Whitney U test was used for continuous variables. The data analysis was performed using SPSS.

Results

Of 481 procedures, 34 (7.1%) IPFs were encountered. The Dorr canal type C was identified as a significant risk factor (p = .004). Other risk factors included female sex (OR 2.30, 95% CI .872–6.079), stovepipe femur (OR 1.749, 95% CI .823–3.713), junior surgeon (OR 1.204, 95% CI .596–2.432), and on-call-duty surgery (OR 1.471, 95% CI .711–3.046), although none showed a significant difference. Of 34 IPFs, 25 (73.5%) were classified as Vancouver type A. The treatment of choice was cerclage wiring. Within the 12 matched pairs identified, the postoperative mobility was slightly worse for the IPF group (delta = .41).

Conclusions

IPF is a serious complication with bipolar hemiarthroplasty. The identification of risk factors preoperatively, in particular femur shape, is crucial and should be incorporated into the decision-making process.
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Metadata
Title
Risk analysis and clinical outcomes of intraoperative periprosthetic fractures: a retrospective study of 481 bipolar hemiarthroplasties
Authors
Petri Bellova
Hinnerk Baecker
Sebastian Lotzien
Marvin Brandt
Thomas A. Schildhauer
Jan Gessmann
Publication date
01-12-2019
Publisher
BioMed Central
Published in
Journal of Orthopaedic Surgery and Research / Issue 1/2019
Electronic ISSN: 1749-799X
DOI
https://doi.org/10.1186/s13018-019-1494-1

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