不可逆性损伤，又称为坏死necrosis，是以酶溶性变化为特点活体内局部组织细胞的死亡。其基本表现为，细胞肿胀，细胞器崩解和蛋白质变性。
结论用甲醛湿敷法损伤窦房结组织不仅导致窦房结细胞不可逆性损伤，而且可诱发窦房结细胞凋亡。
Conclusion Formaldehyde wet dressing method can not only lead to irreversible damage of the SAN cells but evoke the apoptosis of SAN cells as well.
这项技术可以保护，从发生不可逆性脑损伤，撤除生命支持，以生心源性死亡的病人取出的器官，例如，肾脏，肝，胰腺等。
The technology might preserve organs such as the kidneys, liver, and pancreas after withdrawal of life support and cardiac death in people with unrecoverable neurologic impairment.
在一定的放射剂量范围内，部分腮腺小叶边缘腺泡细胞可避免不可逆性放射性损伤。
The part of acinar cells in margin of parotid gland could be avoid irreversible radiation damage in the critical radiation does.
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