■人类对高海拔和/或低温区域的暴露正在增加,在这些情况下,心脏骤停在所有治疗的心脏骤停中所占的比例正在增加。然而,在这些情况下,人们对自动体外除颤器(AED)的性能知之甚少。这项研究的目的是评估6种市售AED在极端环境中的功能和电气特征。
■可电击节律检测的准确性,自检所需的时间,节律分析,和电容器充电,连同总能量,峰值电压,峰值电流,以及将AED放置在模拟高空后测量的除颤波形的相位持续时间,模拟低温,和自然复合高海拔和低温环境30分钟,与在标准环境中测量的值进行比较。
■所有可电击节律均被正确检测到,所有除颤电击均由AED成功实施。然而,自检所需的时间,节律检测,电容器充电时间缩短了1.2%(3个AED,最大12.4%)在模拟高海拔环境中,延长了3.6%(4个AED,最大40.8%)在模拟低温环境中,并延长了4.1%(5个AED,最大52.1%)在自然环境中。此外,总输送能量减少了2.5%(2个AED,最高6.8%)在自然环境中。
■所有研究的AED在模拟和自然环境中正常运行,但是观察到功能和电气特征变化的很大变化。在极端环境下进行心肺复苏时,环境因素的影响可能需要考虑。
UNASSIGNED: Human exposure to high-altitude and/or low-temperature areas is increasing and cardiac arrest in these circumstances represents an increasing proportion of all treated cardiac arrests. However, little is known about the performance of automated external defibrillators (AED) in these circumstances. The objective of this study is to assess the functional and electrical features of 6 commercially available AEDs in extreme environments.
UNASSIGNED: Accuracy of shockable rhythm detection, the time required for self-test, rhythm analysis, and capacitor charging, together with total energy, peak voltage, peak current, and phasic duration of defibrillation waveform measured after placing the AEDs in simulated high-altitude, simulated low-temperature, and natural composite high-altitude and low-temperature environment for 30 min, were compared to those measured in the standard environment.
UNASSIGNED: All of the shockable rhythms were correctly detected and all of the defibrillation shocks were successfully delivered by the AEDs. However, the time required for self-test, rhythm detection, and capacitor charging was shortened by 1.2% (3 AEDs, maximum 12.4%) in the simulated high-altitude environment, was prolonged by 3.6% (4 AEDs, maximum 40.8%) in the simulated low-temperature environment, and was prolonged by 4.1% (5 AEDs, maximum 52.1%) in the natural environment. Additionally, the total delivered energy was decreased by 2.5% (2 AEDs, maximum 6.8%) in the natural environment.
UNASSIGNED: All of the investigated AEDs functioned properly in simulated and natural environments, but a large variation in the functional and electrical feature change was observed. When performing cardiopulmonary resuscitation in extreme environments, the impact of environmental factors may need consideration.