How BMI affects total knee arthroplasty outcomes: 5 study insights

Practice Management

A study published in The Journal of Bone and Joint Surgery examined the complication rate of patients with high body mass indexes after undergoing a total knee arthroscopy.

Researchers examined the common complication and implant survival rates in patients with high BMIs after undergoing total knee arthroscopy.

 

Researchers examined 22,829 consecutive knees in 16,136 patients treated between 1985 to 2012. The average BMI was 31.3 kg/m. Researchers used the Kaplan-Meier survival method to estimate the various rates and the Cox regression model to measure outcomes.

 

Here are the findings.

 

1. Both reoperation and implant revision or removal rates increased in patients with high BMIs. Rates increased proportionally with higher BMIs.

 

2. Researchers associated increasing BMIs with higher wound infection and deep infection rates.

 

3. Patients with BMIs of 35 to 40 kg/m had higher implant revision rates because of aseptic loosening and polyethylene wear than patients with BMIs of 18 to 24.99 kg/m.

 

4. There was no correlation between BMI and venous thromboembolism, tibiofemoral instability, or knee manipulation.

 

5. Researchers concluded reoperation rates, implant revision or removal rates and many common complications were associated with high BMIs.

 

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