内水滴积累发生在大约八小时的聚氨罩内管:一个体外模拟研究
Naoto Funami1, Masafumi Idei1, Yohei Sakai1
1Department of Critical Care Medicine, Yokohama City University Hospital, Yokohama, JPN.
Cureus
|October 27, 2025
概括
带有聚氨袖口的气管在使用8小时内会产生内部水滴. 这种凝结会影响袖口压力准确度,对重症监护室患者构成风险.
科学领域:
- 临界护理医学 临界护理医学
- 生物材料科学 生物材料科学
- 呼吸系统疗法 呼吸系统疗法
背景情况:
- 呼吸机相关性肺炎 (VAP) 是一种严重的ICU并发症,与气管袖口密封不充分的微吸有关.
- 聚氨 (PU) 袖口气管与聚乙烯 (PVC) 相比,提供更好的密封性,但具有较高的水透性.
- 在PU袖口中积聚的袖口内水可能会损害精确的袖口压力监测.
研究的目的:
- 在模拟的机械通风条件下,研究PU带气管内水滴形成的时间.
- 为了比较PU袖口与传统PVC袖口的水积累.
主要方法:
- 在体外模拟中,六个气管 (两个带PU的MicrocuffTM,两个带PU的Parker Flex-TipTM,两个带PVC的TaperGuardTM) 暴露在加热,加湿的空气流中24小时.
- 袖口压力保持在25cmH2O. 在25cmH2O.
- 每小时进行一次检查,以检测可见的手内水滴.
主要成果:
- 从大约8小时 (平均发病时间为8.25小时) 开始,所有PU管中都出现了可见的水滴.
- 在PU管中观察到流体迁移到膨胀线和试验气球中.
- 在整个24小时期间,在PVC管中没有检测到水的积累.
结论:
- 在PU-cuffed气管中,内水滴的形成发生相对较早,约有八个小时的加湿通风.
- 这种早期的凝结可能会导致袖口压力读数不准确,在重症监护机构中引发安全问题.
- 管理PU管患者的临床医生应该意识到这一现象及其对气道设备管理的影响.
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