The peak velocity of the same side arm artery decreased significantly when excessive abduction of the shoulderjoint resulted in SCA second part compressed.
SCA第二段受压，患侧上肢动脉在肩关节过度外展时峰值流速明显减慢。
2
Conclusions Abduction dysfunction of shoulderjoint in obstetric palsy is of multiple causes. Correct classification is important to ensure proper treatment.