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Outcome of Primary Total Knee Arthroplasty in Morbid Obese Patients.
Keywords:
American Knee Society Score, Body Mass Index, Morbid Obesity, Total Knee Arthroplasty.Abstract
Objective: To determine the clinical and functional outcome of primary total knee arthroplasty in morbid obese patients.
Methodology: This descriptive study was conducted in Liaquat National Hospital Karachi from 25th June 2015 to 25th June 2022.All morbid obese patients (BMI ?40kg/m2) who underwent primary TKA were enrolled in this study. Post operative American Knee Society Score (AKSS) was calculated at two year follow up and compared with preoperative score for statistical significance (p<0.05 was considered significant)
Results: A total of 186 patients were operated. Bilateral TKA was performed in 182(97.84%) patients and unilateral in 4(2.15%) patients. The mean age of these patients were 62.1±8.2 years. Female patients were 170(92%) and male were 16(8%). Majority (59.6%, n=111) of our patients had BMI in between 40 to 49.9kg/m2 while 75(40.3%) patients had BMI >50 kg/m2. At two years follow up the Clinical American Knee society Score (pain, stability, range of motion) improved significantly in all patients (p<0.05) while the functional American Knee Society Score (walking distance, climbing and descending stairs) did not improved significantly(p>0.05).
Conclusion: Primary total knee arthroplasty in morbid obese patients yielded significantly better clinical outcome in terms of pain, stability and range of motion than functional outcome.(walking distance, climbing and descending stairs)
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