全膝关节置换术中膝关节容积率与术后早期膝关节活动度的相关性研究

Correlation between knee joint volume ratio and post-operative range of motion of knee after total knee arthroplasty

目的探讨初次人工全膝关节置换术中膝关节容积率与术后早期膝关节活动度的相关性。方法纳入自2016-03-2017-05行初次全膝关节置换术治疗的32例女性单侧膝关节骨性关节炎,术中测量膝关节容积及膝关节周径,计算膝关节容积率(膝关节容积/膝关节周径)。采用直线相关与回归分析膝关节容积率与膝关节活动度的相关性。结果膝关节活动度为99°~135°(117±9.2)°,膝关节容积率为1.44~2.27(1.84±0.24)。以膝关节活动度为因变量(Y)、膝关节容积率为自变量(X)进行直线相关分析,得出结果相关系数r=0.88,标准误差为3.60。综合以上结果得出回归方程,即Y=44.62+25.87X。回归系数经方差分析检验(F=106.900,P<0.001),提示膝关节容积率与术后膝关节活动度呈直线正相关。结论初次人工全膝关节置换术中膝关节容积率较大的患者更容易获得较为理想的术后早期膝关节活动度。

Objective To investigate the correlation between volume ratio(VR)and early range of motion(ROM)of the knee after total knee arthroplasty(TKA).Methods Thirty-two female patients with knee osteoarthritis treated with TKA of unilateral knee were included from March 2016 to May 2017.The volume and perimeter of the knee were measured and the volume ratio(knee volume/perimeter)was calculated,linear regression and correlation method were used to determine whether correlation occurred between VR and ROM.Results Knee ROMs were 99°-135°(117±9.2)°,knee VRs were 1.44-2.27(1.84±0.24).Knee ROM was defined as the dependent variable(Y)and VR independent variable(X),linear correlation analysis indicated correlation coefficients(r=0.88)and standard error 3.60.The regression equation was deduced from the result:Y=44.62+25.87 X.By using the analysis of variance(F=106.900,P<0.001),regression coefficient indicated knee VR was linearly positive to the ROM after TKA.Conclusion It is easier for the knee with bigger VR to have better ROM after TKA.