Faculty of Medicine, Bone and Cartilage Unit, University of Kuopio, Kuopio, Finland.
Scand J Surg. 2010;99(1):45-9. doi: 10.1177/145749691009900110.
Obesity has been linked to the development of osteoarthritis of the knee and increases the probability to fall into total knee arthroplasty. In this study we compared short-term outcome of total knee arthroplasty (TKA) in non-obese and obese patients.
A total of 100 patients underwent TKA between October 2006 and March 2007. They were divided into two groups based on the body mass index: 52 of the patients were obese (BMI = 30 kg/m2) and 48 non-obese (BMI < 30 kg/m2). The short-term out-come was studied using clinical, functional and radiological analysis. The mean of the follow-up period was 3 months.
There were five complications (2 wound infections, phlebitis, nerve injury and massive edema) in obese patients group compared with no complications in non-obese (p = 0.028). The obese patients had also worse postoperative range of motion (110 degrees vs.118 degrees , p = 0.001) than non-obese and the number of technical errors was 17 in obese and 5 in non-obese group, respectively (p = 0.007).
We suggest that obesity may impair the early outcome of total knee arthroplasty and obese patients should be informed about the increased risk of complications related to TKA. Key words: Total knee arthroplasty; body mass index; obesity; complications; range of motion; mechanical axis.
肥胖与膝关节骨关节炎的发生发展有关，并增加了全膝关节置换术的可能性。本研究比较了非肥胖和肥胖患者的全膝关节置换术（TKA）的短期结果。
2006 年 10 月至 2007 年 3 月期间共 100 例患者接受了 TKA。他们根据体重指数分为两组：52 例肥胖患者（BMI=30kg/m2）和 48 例非肥胖患者（BMI<30kg/m2）。使用临床、功能和放射学分析评估短期结果。平均随访时间为 3 个月。
肥胖患者组有 5 例并发症（2 例伤口感染、静脉炎、神经损伤和大量水肿），而非肥胖患者组无并发症（p=0.028）。肥胖患者术后的运动范围也较差（110 度与 118 度相比，p=0.001），肥胖患者的技术错误数为 17 例，而非肥胖患者的技术错误数为 5 例（p=0.007）。
我们建议肥胖可能会影响全膝关节置换术的早期结果，肥胖患者应被告知与 TKA 相关的并发症风险增加。关键词：全膝关节置换术；体重指数；肥胖；并发症；运动范围；机械轴。
