Hines A S, Askew M J, Kovacik M W, Noe D A, Gradisar I A
Walter A. Hoyt, Jr. Musculoskeletal Research Laboratory, Department of Orthopaedic Surgery, Summa Health System, Akron, Ohio, USA.
Biomed Sci Instrum. 1997;33:471-6.
Electromyographic signals (EMG) from surface electrodes over the vastus medialis, rectus femoris and vastus lateralis were monitored during isometric knee extension for 10 TKA patients and 6 control subjects. No significant side-to-side differences in normalized EMG signals from any of the monitored muscles were found when the left and right legs of the control group were compared or when the operative and the non-operative legs of the patient group were compared. However, both the operative and the non-operative legs in the patient group differed significantly (p < 0.01) in normalized EMG from the control group. This study has shown that a muscle imbalance, possibly leading to patellar tracking problems, does not routinely exist following TKA through a medial parapatellar incision.
在10名全膝关节置换术（TKA）患者和6名对照受试者进行等长膝关节伸展时，监测了股内侧肌、股直肌和股外侧肌表面电极的肌电信号（EMG）。当比较对照组的左右腿时，或者当比较患者组的手术腿和非手术腿时，未发现任何监测肌肉的标准化EMG信号存在显著的左右差异。然而，患者组的手术腿和非手术腿在标准化EMG方面与对照组均存在显著差异（p < 0.01）。本研究表明，通过内侧髌旁切口进行全膝关节置换术后，通常不会出现可能导致髌股轨迹问题的肌肉失衡。
