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JAMA:减少血管紧张素暴露对老年重症患者血管扩张性低血压90天死亡率的影响

2020-02-28 patrick 大医编

通常向重症监护病房(ICU)患者施用升压药以升高血压。平衡血管加压药的风险和益处是一项挑战,特别是在老年患者中。

通常向重症监护病房(ICU)患者施用升压药以升高血压。平衡血管加压药的风险和益处是一项挑战,特别是在老年患者中。

为确定是否通过允许的低血压(平均动脉压[MAP]目标为60-65 mm Hg)减少对血管加压药的接触以降低死亡率,近日有学者探究了减少血管紧张素暴露对老年重症患者血管扩张性低血压90天死亡率的影响。

这是一项在英国的65个ICU中进行了一项多中心,务实的随机临床试验,纳入2600名年龄在65岁或以上且患有血管舒张性低血压的随机患者。该研究于2017年7月至2019年3月进行,后续研究于2019年8月完成。干预措施根据MAP指标(60-65 mm Hg,允许性低血压)(n = 1291)或根据常规护理(n = 1307),将患者按1:1的比例随机分配至血管加压药。主要临床结果是90天全因死亡率。

在2600名随机分组的患者中,除去拒绝或撤消同意的患者后,主要结果分析中包括2463名(95%)(平均[SD]年龄75岁[7岁];男性1387 [57%])。该研究发现与常规护理组相比,随机分配至允许性低血压组的患者接受升压药的风险较低(中位持续时间33小时vs 38小时;中位数差异为–5.0;95%CI为–7.8至–2.2小时;去甲肾上腺素当量中位数,分别为17.7 mg和26.4 mg;中位数差异为–8.7 mg;95%CI为–12.8至-4.6 mg)。在90天时,允许的低血压中有500例死亡(1221)(41.0%),而常规护理组中有544例(1242)(43.8%)死亡(绝对风险差异为-2.85%; 95%CI为-6.75至1.05;P = .15)(未经调整的相对风险,0.93; 95%CI,0.85-1.03)。

如果对预先设定的基准变量进行调整,则90天死亡率的优势比为0.82(95%CI,0.68至0.98)。许可治疗组报告了79例患者的严重不良事件(6.2%),常规治疗组报告了75例患者(5.8%)的严重不良事件。最常见的严重不良事件是急性肾功能衰竭(41 [3.2%] vs 33 [2.5%])和室上性心律失常(12 [0.9%] vs 13 [1.0%])。

该研究认为在接受血管舒张降压治疗的65岁或65岁以上患者中,与常规治疗相比,放宽性低血压并未导致90天死亡率有统计学上的显着降低。但是,在解释研究的临床重要性时,应考虑主要结果的点估计周围的置信区间。

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    2020-09-28 lsj637
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    2020-02-28 旺医

    顶刊就是顶刊,谢谢梅斯带来这么高水平的研究报道,我们科里同事经常看梅斯,分享梅斯上的信息

    0

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