【Heng】評論
凍傷(Frostbite)機制包括二者(1)血管傷害造成組織缺氧(2)直接冷凍造成細胞傷害The pathogenesis involves two basic mechanisms:(1) vascular damage leading to tissue anoxia and(2) actual tissue freezing leading to cellular injury. 出處是Pathologic basis of veterinary disease, 6th, page 1067.e1-底下詳述-(1)主要為微血管的損害為主(damage to the microvasculature)，但未提到血管損害的機制是否與組織傷害的機制相同 另外殘存的血管(surviving vessels)中內皮的損傷亦可造成血管通透性增加，而致血容及灌流量下降，血液黏性增加及凝血等，進一步阻礙血流。(2)組織直接冷凍(actual freezing of the tissue)是先在細...