| ObjectivesTo analyze common comorbidities and complications and the functional evaluation of the knee in obese patients with total knee arthroplasty.MethodFrom March 2007 to March 2009,54 patients (102 knee)with an average age of 64.58(rang from 50 to 78)were treated by total knee arthroplasty(TKA) at Orthopedic Joint Ward in First Affiliated Hospital of China Medical University. Among them, patients with body mass index>27.1 kg/m2 were regarded as obese group(n=27),and body mass index<25.0 kg/m2 were regarded as non-obese group(n=27).The knee society clinical rating system (KSCRS) was recorded preoperatively and postoperatively at 6 months follow-up. We analyzed the collected data of patients and had a statistic comparison. The operations were completed by the same surgeon and used the same prosthesis. Particular attention was given to patients with sufficient information on surgery, treatment of complications and postoperative rehabilitation programs.ResultsAll of the 54 patients were safely discharged. The incidence of preoperative (hypertension, diabetes) and postoperative (wound problems, joint stiffness, deep vein thrombosis) complications in obese group is greater than that of non-obese group. The function scores of KSCRS in obese group are lower than that of non-obese group (P=0.019, P<0.05), however, there is no significant difference in joint score (P=0.928, P>0.05).As to preoperative KSCRS scores, both obese group and non-obese group show significant improvement at six month(respective P<0.05), with no significant improvement between the two groups(obese group P=0.144, non-obese group P=0.713, P>0.05).ConclusionTotal knee arthroplasty can alleviate knee pain and improve functions. Obesity does not affect the short-term outcomes of TKA. However, the incidence of comorbidities and postoperative complications is relatively high. Therefore, physicians should pay more attention to the obese patients in perioperative management.
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