Analysis Of Perioperative Problems And Functional Evaluation Of Knee In Obese Patients With Total Knee Arthroplasty

ObiectivesTo analysis the relationship among body mass index (BMI),comorbidities, complications, operative time, duration of hospitalization,and functional evaluation of knee in obese patients with total kneearthroplasty.MethodFrom December2010to December2012,we expolred64patients withan average age of61who undergoing a primary total knee arthroplasty onone side at department of bone joints in first Hospital of Jilinuniversity.We devided them into three groups: obese group whose bodymass index≥28kg/m2;overwight group whose body mass index regionwas24kg/m2-27.9kg/m2；normal group whose body mass index＜24kg/m2,according to the standard of body mass indexintroduced by WHO for people of the Asian-Pacific region.We analyzedthe collected data of patients,including operative time, duration ofhospitalization, comorbidities, and complications.The evaluations of knee(HSS scores)were made preoperatively and postoperatively at3monthsfollow-up.The operations were completed by the same surgeon.We madea statistic comparison of the data which we had collected during thetreatment. ResultThe average age of this64patients is61.14(SD±6.69),average BMI is27.03kg/m2(SD±6.03),average operative time is139.7minutes(SD±28.16),average days of hospitalization is9.26(SD±3.18). Patients inobese group need longer operative time than patients of normal group(p＜0.05).The incidence of comorbidities and complications in obese groupis greater than that of nomal group(p＜0.05).As to preoperative HSSscores,all the patients in three groups show significant improvement atthree month(p＜0.05),with no significant improvement among the threegroup(p＞0.05).ConclusionObesity does not affect the short-term outcomes of total kneearthroplasty. However,obese patients need longer operative time.Theincidence of comorbidity and complication rates are relativelyhigh.Therefore precautions need to be taken when dealing with obesepatients, we recommend educating the patient on the higher risk ofcomplication due to their obesity, with the suggestion that they attempt tolose weight prior to surgery.