The Study Of The Short-term Function Influenced By Body Mass Index After Total Knee Arthroplasty

ObjectivesRestrospective study was conducted to analyze the function influenced by body mass index (BMI) after total knee arthroplasty(TKA). Thus offering the treatment suggestion to a osteoarthritis patient, guiding and evading the surgery risk clinically, and judging the effective prognosis to the clinical patient.Methods:80 patients knees treated by TKA from Orc,2008 to Orc,2010 were reviewed. They were assessed the HSS scale, knee function and ROMs (range of knee motion) before and after surgery. All cases are all the first times received TKA, reduce individual difference as far as possible, review and statistic the related materials. Evaluate Mainly from knee pain, joint mobility etc and the corresponding period single score of the TKA postoperative outcomes.Result:The HSS scale, knee function pain,and ROMs in each group improveed obviously than before surgery.There were not significant diferences in overweight group, obese group and non-obese group in each scale both before and after surgery. (P>0.05)Preoperative comparison revealed that morbidly obese group had similar scale with other groups(P>0.05). Although morbidly obese group had lower score in HSS and ROMs than other groups after surgery, they weren't significantly different form other groups(P>0.05). And in postoperative function scores, pain score, morbidly obese group significantly lower than other groups(P>0 01), and the postoperative improvement also significantly lower than other groups.Conclusion: TKA curative effect is appreciated. BMI does not affect the short-term outcomes of TKA when it't lower than 30. 0kg/m2, but may cause negative influences in pain, function and motion when BMI higher than 30. 0kg/m2, that may help us prognostic.