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Patients with prior lumbar fusion had increased dislocation, revision risks after THA
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Recently published results showed increased risks of hip component dislocation and revision total hip arthroplasty among patients with prior lumbar fusion for degenerative lumbar spine disease.
Researchers compared 934 patients who underwent primary elective lumbar fusion for degenerative disc disease and subsequent total hip arthroplasty (THA) with 934 patients who underwent THA only. Patients were matched according to age, gender, race, Deyo comorbidity score, year of surgery and surgeon volume. Researchers assessed revision and dislocation rates at 3 months, 6 months and 12 months postoperatively.
Results showed a statistically significant increase in dislocation rates at 6 months and 12 months among patients with a prior fusion vs. controls. Researchers also noted patients with a prior fusion had a statistically significant increase in THA revision rates at 6 months and 12 months.
Regression models showed a 7.83-times and 7.19-times increased risk of readmission for dislocation within 6 months and 12 months, respectively, among patients with prior fusion compared with matched controls. Patients with a prior fusion had a 4.24-times and 4.64-times increased risk of revision within 6 months and 12 months, respectively.
Researchers noted prosthetic dislocation as an indication for THA revision increased from 33.3% within 3 months to 47.2% within 12 months among patients who underwent fusion with subsequent primary THA. Compared with matched controls, results showed patients with prior lumbar fusion had a 139.3% shorted time to revision. – by Casey Tingle
Disclosures: Perfetti reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.
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