Background: The quality of cardiopulmonary resuscitation (CPR) is closely related to the survival rate of a patient, and it is crucial to maintain the quality of CPR during the ambulance journey to the receiving hospital. The purpose of this study was to investigate the effects of different stretcher bed heights on operator CPR quality./nMethods: In this randomized crossover trial, 16 male emergency medical technicians-paramedics (EMT-Ps) performed continuous chest compressions on a hemimorphic mannequin for 5 minutes, alternating between the current height of the stretcher bed on the ambulance (38 ± 1 cm) (S-38) and the height of the participant's midpoint of the patella (S-knee), where the stretcher bed surface is./nResults: According to the analysis of the quality of CPR exercises with two different stretcher bed heights at 5 minutes of continuous chest compression, the mean chest compression depth (CCD) of the S-38 position (53.81 ± 1.91 cm) was significantly lower than that of the S-knee (55.12 ± 2.03 cm; p < 0.001). The mean chest compression rate (CCR) of the S-38 position (111.44 ± 3.44 beats/min) was significantly higher than that of the S-knee (109.63 ± 4.46 beats/min; p = 0.027). The mean of total chest compressions (TCC) of the S-38 position (557.44 ± 16.81 times) was significantly higher than that of the S-knee (548.24 ± 19.40 times; p = 0.029). The rating of perceived exertion (RPE) of the S-38 position was significantly higher than that of the S-knee (12.75 ± 1.91 %; p = 0.015). Only the chest compression rebound rate (CCRR) (S-38: 97.56 ± 4.63 % vs. S-knee: 98.31 ± 1.89 %, p = 0.401) and the chest compression fraction (CCF) (S-38: 98.44 ± 0.81 % vs. S-knee: 98.44 ± 0.96 %, p = 1.000) did not reach a significant difference./nConclusion: When a resuscitator is performing chest compressions in a standing position in an ambulance, the excessive downward leaning of the resuscitator's upper body affects CPR quality and increases fatigue. This study has verified that setting the stretcher bed of the ambulance at the knee height of the EMTs provides better CPR quality and lower fatigue.

中文翻译：

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实验室环境中救护车担架床高度调节对心肺复苏质量和救援人员疲劳的影响

背景：心肺复苏（CPR）的质量与患者的存活率密切相关，在救护车前往接收医院的过程中保持心肺复苏的质量至关重要。本研究的目的是调查不同担架床高度对操作员 CPR 质量的影响。/n方法：在这项随机交叉试验中，16 名男性急救医疗技术人员 - 护理人员 (EMT-P) 对半变形人体模型进行连续胸外按压5 分钟，在救护车上担架床的当前高度 (38 ± 1 厘米) (S-38) 和参与者髌骨 (S 膝) 中点的高度之间交替，担架床表面所在的位置。 /n结果：根据对两种不同担架床高度连续胸外按压5分钟的CPR练习质量的分析，S-38位的平均胸外按压深度（CCD）（53.81±1.91 cm）显着低于S 膝（55.12 ± 2.03 厘米；p < 0.001）。S-38 位置的平均胸外按压率 (CCR)（111.44 ± 3.44 次/分钟）显着高于 S 膝（109.63 ± 4.46 次/分钟；p = 0.027）。S-38 位置的总胸外按压 (TCC) 平均值（557.44 ± 16.81 次）显着高于 S 膝（548.24 ± 19.40 次；p= 0.029）。S-38 位置的感知用力 (RPE) 等级显着高于 S 膝 (12.75 ± 1.91 %; p = 0.015)。只有胸外按压回弹率 (CCRR)（S-38：97.56 ± 4.63 % 与 S 膝：98.31 ± 1.89 %，p = 0.401）和胸外按压分数 (CCF) (S-38: 98.44 ± 0.81 %与 S 膝：98.44 ± 0.96 %，p = 1.000) 没有达到显着差异。/n 结论：当复苏器在救护车上以站立姿势进行胸外按压时，复苏器上身过度向下倾斜会影响 CPR 质量并增加疲劳度。这项研究已经证实，将救护车的担架床设置在 EMT 的膝盖高度可以提供更好的 CPR 质量和更低的疲劳。