在中国,通过PaCO和pH目标来确定脑死亡的呼吸暂停测试的战略分析:一项多中心回顾性研究

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Updated: Sep 19, 2025

A Model to Simulate Clinically Relevant Hypoxia in Humans

A Model to Simulate Clinically Relevant Hypoxia in Humans

Published on: December 22, 2016

Xintong Zhang¹, Chen Chen¹, Chao Sun²

¹Department of Neurology, Neurocritical Care Unit, The First Affiliated Hospital of Anhui Medical University, Hefei, China; Brain Injury Evaluation Quality Control Center of National Health Commission of China, China.

Journal of critical care

|June 8, 2025

概括

呼吸暂停测试 (AT) 用于脑死亡诊断是有效的,持续时间为7-9分钟. 优化测试前的PaCO2,pH和氧化指数 (OI) 可以提高AT的安全性和诊断准确性.

科学领域:

神经学神经学
关键护理医学关键护理医学
身体生理学身体生理学

背景情况:

大脑死亡 (BD) 表示整个大脑功能不可逆转的损失.
呼吸暂停测试 (AT) 对于诊断BD至关重要.
更新的AT标准整合了PaCO2和pH,超出了个别的PaCO2目标.

研究的目的:

根据新的双重诊断标准,探索影响AT的因素.
为了尽量减少非诊断性AT结果和相关并发症.
为了优化AT的实施,以确定大脑死亡.

主要方法:

在中国五家医院 (2018-2023) 对620名BD患者的回顾性分析.
按AT持续时间,温度,测试前的PaCO2和氧化指数 (OI) 分组样本.
多变量线性回归确定了与AT结果相关的临床指标.

主要成果:

双AT目标诊断率为92.4%,比传统标准下降3.4%.
超过9分钟的AT持续时间并没有改善诊断率,但增加了严重的头过度和酸性.
较高的基线PaCO2 (≥40 mmHg) 和OI (≥200) 与更短的AT持续时间和更高的诊断率相关.
患者的体重,心率,测试前的pH,测试前的PaCO2和AT持续时间影响了最终的PaCO2和pH水平.

结论:

7-9分钟的AT持续时间通常足以实现双重诊断目标.
调节基线PaCO2 (≥40 mmHg),pH和OI (≥200) 可以提高AT安全性并减少非诊断性结果.
临床指标,如测试前的PaCO2,pH和OI对于优化AT至关重要.

关键词:

测试呼吸暂停的测试.大脑死亡大脑死亡在PaCO(2) 中.它们的pH值为pH.

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