Edwards John Z, Greene Kenneth A, Davis Robert S, Kovacik Mark W, Noe Donald A, Askew Michael J
Walter A. Hoyt, Jr. Musculoskeletal Research Laboratory, Department of Orthopaedic Surgery, Summa Health System, Akron, Ohio, USA.
J Arthroplasty. 2004 Apr;19(3):369-72. doi: 10.1016/j.arth.2003.12.001.
Flexion following total knee arthroplasty can be visually estimated, measured with a goniometer placed against the patient's leg, or measured from a lateral radiograph of the flexed knee. Three examiners, in a blinded fashion, estimated the degree of maximal knee flexion and measured the flexion with a goniometer for 27 knees in 16 patients. A lateral knee radiograph then was taken and the flexion angle was measured from the radiograph by 2 different methods. Although interobserver and intraobserver correlation coefficients were high (0.79 and 0.92), 45% of the visual estimates and 22% of the goniometer measurements differed by 5 degrees or greater from the radiographic measurements. These differences increased as the flexion angle increased. Body mass index did not affect the accuracy of the estimates or goniometer measurements.
全膝关节置换术后的屈曲度可以通过视觉估计、使用靠在患者腿部的角度计测量，或者从屈膝的侧位X线片测量。三名检查者以盲法对16例患者的27个膝关节估计最大屈膝度并使用角度计测量屈膝度。然后拍摄膝关节侧位X线片，通过两种不同方法从X线片测量屈曲角度。尽管观察者间和观察者内相关系数较高（分别为0.79和0.92），但45%的视觉估计值和22%的角度计测量值与X线测量值相差5度或更大。这些差异随着屈曲角度的增加而增大。体重指数不影响估计值或角度计测量的准确性。
