简述间羟胺升压作用的机制及特点

简述间羟胺升压作用的机制及特点
2025-03-16 08:07:45
推荐回答(1个)
回答1:

【盐酸多巴胺】是去甲肾上腺素生物合成的前体,为中枢性递质之一,具有兴奋β-受体、α-受体和多巴胺受体的作用,兴奋心脏β-受体可增加心肌收缩力,增加心输出量。兴奋多巴胺受体和α-受体使肾、肠系膜、冠脉及脑血管扩张、血流量增加。对周围血管有轻度收缩作用,升高动脉血压,本药的突出作用为使肾血流量增加,肾小球滤过率增加,从而促使尿量增加,尿钠排泄也增加。临床用于各种类型的休克,尤其适用于休克伴有心收缩力减弱,肾功能不全者。【重酒石酸间羟胺】主要作用于α受体,对β1受体作用较弱。部分作用是通过促进交感神经末梢释放去甲肾上腺素。适用于休克早期的治疗,防治椎管内阻滞麻醉时发生的急性低血压。用于因出血、药物过敏、手术并发症及脑外伤或脑肿瘤合并休克而发生的低血压的辅助性对症治疗,也可用于治疗心原性休克或败血症所致的低血压。【区别】这是两种不同的药,虽然都可用于治疗休克。但是药物作用原理完全不同,副作用也大不一样。使用时一定要按医嘱。

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