IAS spasm makes the resting anal pressure rise and compresses the blood vessel, while the local ischemia makes anal fissure occur and become chronic.
IAS痉挛使肛管静息压增高,压迫血管导致局部缺血,致使肛裂形成和慢性化。
参考来源 - 活血柔肝法对肛门内括约肌影响及对肛裂治疗作用的研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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