Wijesekera C G
General Hospital (Teaching) Kandy.
Ceylon Med J. 1990 Jun;35(2):57-61.
The clinical presentation of 26 knees in 25 children with habitual dislocation of the patella caused by contracture of the quadriceps muscle was studied. They had all received intramuscular injections to the thigh during infancy. The predominant symptom was sudden giving way of the knee during activity. The patella dislocated everytime the knee flexed and when allowed to do so, full flexion was possible; when it was prevented from dislocating, knee flexion was limited in all cases. At operation, it was noted that the contractures were confined to the iliotibial band, vastus lateralis and the lateral fibres of the rectus femoris muscle. Division of the contracted bands corrected the dislocation. In four cases, medial plication was required as an additional procedure. A post-operative extensor lag of the knee was present in all cases, which recovered within one year.
对25名儿童因股四头肌挛缩导致习惯性髌骨脱位的26个膝关节的临床表现进行了研究。他们在婴儿期均接受过大腿肌肉注射。主要症状是活动时膝关节突然发软。每次膝关节屈曲时髌骨都会脱位，若允许其脱位，则可实现完全屈曲；若防止其脱位，则在所有病例中膝关节屈曲均受限。手术时发现挛缩局限于髂胫束、股外侧肌和股直肌的外侧纤维。切断挛缩带可纠正脱位。4例需要额外进行内侧折叠术。所有病例术后均存在膝关节伸肌滞后，1年内恢复。
