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带你全方位的去了解一下急性肾衰竭的分型及病因

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  急性肾衰竭是指在数小时至数日中发生的肾功能破坏,出现氮质废物滞留血中和尿量减少。对于慢性肾衰竭而言,急性肾衰竭的后果更为严重,因为急性肾衰竭时病人没有机会动员适应机制,来不及代偿。
  急性肾衰竭有广义和狭义之分,广义的急性肾衰竭可分为肾前性、肾性、肾后性三类。狭义的急性肾衰竭是指急性肾小管坏死。下面看一下各类型急性肾衰竭的病因:
  一、肾前性急性肾衰竭病因
  血容量不足:呕吐和腹泻;烧伤和大量出汗;应用利尿剂和渗透性利尿(糖尿病)
  心排血量降低:心力衰竭和低心排血量综合征;全身血管扩张(应用血管扩张剂)
  二、肾后性急性肾衰竭病因
  尿路梗阻所致:尿路结石、双侧肾盂积液、前列腺肥大和肿瘤、尿道狭窄。
  三、肾实质性急性肾衰竭病因
  1.急性肾小管坏死:缺血、中毒、异常HB
  2.急性肾间质病变:过敏、感染、代谢异常和肿瘤。
  3.肾小球和肾小管:急性和急进性肾炎、多发性小血管炎、肾皮质坏死。
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