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Do Conversion Total Hip Arthroplasty Yield Comparable Results to Primary Total Hip Arthroplasty?
Ran Schwarzkopf1, Garwin Chin2, Kelvin Kim1
1Division of Adult Reconstruction, Orthopaedic Surgery Department, NYU Langone Medical Center Hospital for Joint Diseases, New York, New York.
The Journal of Arthroplasty
|October 1, 2016
Summary
Conversion total hip arthroplasty (THA) requires more resources and longer hospital stays than primary THA. These findings suggest conversion THA procedures should be reclassified due to their increased complexity and resource demands.
Area of Science:
- Orthopedic Surgery
- Arthroplasty
- Hip Reconstruction
Background:
- Rising incidence of hip fractures in the elderly population.
- Conversion total hip arthroplasty (THA) is used to salvage failed hip fracture fixation and treat other hip conditions.
- Limited research distinguishes perioperative characteristics of conversion THA from primary THA.
Purpose of the Study:
- To compare the perioperative characteristics of conversion THA with primary THA.
- To identify resource utilization differences between conversion and primary THA.
Main Methods:
- Retrospective data collection from 119 conversion THAs and 251 primary THAs at two centers.
- Multivariable regression analysis for continuous and dichotomous variables.
- Chi-square test for categorical variables.
Main Results:
- Conversion THAs had significantly longer hospital stays (3.8 vs 2.8 days) and operative times (168 vs 129 minutes) compared to primary THAs.
- Conversion THAs showed a greater likelihood of requiring metaphysis/diaphysis fixation.
- Conversion THAs were more likely to necessitate revision-type implant components.
Conclusions:
- Conversion THAs demand more resources and specialized implants than primary THAs.
- The increased complexity of conversion THA warrants reclassification to reflect the higher burden on treatment centers.
