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High BMI does not contraindicate unicompartmental knee replacement
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Researchers found a high body mass index in patients does not decrease the benefit of an Oxford mobile bearing unicompartmental knee replacement, result in a lower survival rate or contraindicate the use of the implant, according to this study.
The researchers found no significant difference in survival rate between groups or Objective American Knee Society Score at 5 years. The Oxford Knee Score and American Knee Society Scores decreased as body mass index (BMI) increased, according to the abstract. Patients with higher BMI were significantly younger at the time of surgery.
“Increasing BMI was not associated with an increasing failure rate. It was also not associated with a decreasing benefit from the operation,” the researchers stated in the abstract. “Therefore, a high BMI should not be considered a contraindication to mobile bearing unicompartmental knee replacement.”
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The investigators conducted a prospective study of 2,438 medial Oxford unicompartmental knee replacements and divided them into groups according to body mass index (BMI) less than 25, BMI 25 to less than 30, BMI 30 to less than 35, BMI 35 to less than 40, BMI 40 to less than 45 and BMI greater than or equal to 45. Mean follow-up was 5 years.
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