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Anesthesiology:去甲肾上腺素输注可预防剖宫产术中腰麻后低血压:剂量研究

2019-11-29 anesthGH “罂粟花”微信号

去甲肾上腺素常用于预防剖宫产时腰麻后低血压;但尚无关于其最佳剂量的研究。本研究旨在比较输注三种不同浓度去甲肾上腺素对剖宫产术后低血压发生率的影响。

背景与目的

去甲肾上腺素常用于预防剖宫产时腰麻后低血压;但尚无关于其最佳剂量的研究。本研究旨在比较输注三种不同浓度去甲肾上腺素对剖宫产术后低血压发生率的影响。

方 法

本研究为双盲、随机、对照试验,纳入对象为计划剖宫产的足月孕妇。腰麻后开始输注去甲肾上腺素。患者被随机分为三组,去甲肾上腺素注入浓度分别为 0.025 μg · kg-1 · min-1, 0.050 μg · kg-1 · min-1以及0.075 μg · kg-1 · min-1·。术中出现高血压时停止输液。主要指标是腰麻后低血压的发生频率(定义为收缩压下降低于基线读数的80%)。比较三组的收缩压、心率、术中高血压发生率、心动过缓发生率、新生儿结局。

结 果

本研究共纳入了244位产妇。腰麻后低血压发生率较低的为0.050-μg · kg-1 · min-1剂量组(23/93[24.7%],优势比:0.45(95%置信区间CI: 0.24 - 0.82), P = 0.014)和0.075-μg · kg-1 · min-1剂量组(25/96[26.0%],优势比:0.48(95%置信区间CI: 0.26 - 0.89), P = 0.022)与 0.025-μg · kg-1 · min-1剂量组(40/95 [42.1%])。与 0.025-μg · kg-1 · min-1剂量组相比,两个高剂量组(0.050-μg · kg-1 · min-1组和 0.075-μg · kg-1 · min-1组)的收缩压较高,心率较低。三组在术中高血压发生率、心动过缓发生率、新生儿结局等方面具有可比性。

结 论

与 0.025-μg · kg-1 · min-1剂量组相比,0.050-μg · kg-1 · min-1和0.075-μg · kg-1 · min-1的去甲肾上腺素浓度可有效减少剖宫产手术腰麻后低血压发生。

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    2019-12-01 skhzy

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