Total elbow arthroplasty in obese patients

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Public Health

Background:

• Rising obesity rates in the US necessitate understanding its impact on surgical outcomes.
• Primary total elbow arthroplasty (TEA) is a common procedure for various elbow conditions.
• The influence of obesity on TEA performance requires thorough investigation.

Purpose of the Study:

• To evaluate the effect of obesity on the outcomes of primary total elbow arthroplasty.
• To compare revision rates and survival rates between obese and non-obese patients undergoing TEA.
• To identify specific risks associated with obesity in TEA patients.

Main Methods:

• Retrospective analysis of 723 primary semiconstrained TEAs performed between 1987 and 2006.
• Patients categorized as non-obese (BMI <30 kg/m2) or obese (BMI ≥30 kg/m2).
• Kaplan-Meier survival analysis and Cox regression models used to assess revision risk, adjusting for covariates.

Main Results:

• Obese patients had significantly lower 10-year survival rates for TEA revision (70% vs. 86% for non-obese).
• Higher rates of revision for mechanical failure were observed in obese patients (72% vs. 88% for non-obese).
• Severely obese patients (BMI 35-<40 kg/m2) faced a threefold increased risk of revision for any reason and mechanical failure.

Conclusions:

• Obesity is an independent risk factor adversely affecting total elbow arthroplasty performance.
• Obese individuals undergoing TEA have a demonstrably higher risk of revision surgery.
• Preoperative counseling regarding the risks of obesity is crucial for patients considering elbow replacement.