Heart Centre Hasselt/Jessa Hospital, Hasselt, Belgium.
Eur J Emerg Med. 2012 Feb;19(1):28-34. doi: 10.1097/MEJ.0b013e328347a2aa.
Sustained external chest compressions during cardiocerebral resuscitation (CCR) are physically demanding. It might be hypothesized that a high cardiopulmonary exercise capacity and/or muscle strength delays the development of physical fatigue and, consequently, preserves CCR quality. We intended to assess the impact of cardiopulmonary exercise capacity and muscle strength on CCR quality.
Fifteen healthcare professionals (10 men and five women, mean age 34±9 years) performed a 15-min hands-on CCR session on an adult training manikin. CCR compression depth (from which CCR quality was calculated) and frequency were monitored. During CCR we assessed serial blood lactate concentrations, and provided continuous heart rate monitoring. Relationships were examined between participant characteristics, peak cardiopulmonary exercise capacity, ventilatory threshold, maximal muscle strength, muscle strength endurance and CCR quality.
Significant univariate correlations were found between 15-min CCR quality and body height (r=0.53), ventilatory threshold (r=0.67), peak oxygen uptake capacity (r=0.54), peak cycling power output (r=0.54), and maximal isometric elbow extension strength (r=0.55) (P<0.05). CCR quality was significantly lower in females, when compared with males (P<0.05). Within different timeframes, CCR quality was mainly related to the ventilatory threshold up to the first 5 min (P<0.05), whereas CCR quality was mainly related to maximal isometric elbow extension strength after 5 min (P<0.05).
In healthcare professionals, the ventilatory threshold is significantly related to CCR quality during the first few min. Healthcare professionals who are regularly involved in CCR should therefore aim to achieve/sustain a high aerobic exercise capacity.
Study registration number: ISRCTN70447230, www.controlled-trials.com/ISRCTN70447230.
心肺复苏（CCR）过程中需要持续进行胸外按压，这对体力要求较高。因此可以假设，较高的心肺运动能力和/或肌肉力量可能会延迟体力疲劳的发生，从而保持 CCR 的质量。本研究旨在评估心肺运动能力和肌肉力量对 CCR 质量的影响。
15 名医疗保健专业人员（10 名男性，5 名女性，平均年龄 34±9 岁）在成人训练模型上进行了 15 分钟的 CCR 手部操作。监测 CCR 压缩深度（由此计算 CCR 质量）和频率。在 CCR 过程中，我们监测了连续的血乳酸浓度，并提供了连续的心率监测。检查了参与者的特征、最大心肺运动能力、通气阈值、最大肌肉力量、肌肉力量耐力与 CCR 质量之间的关系。
15 分钟 CCR 质量与身高（r=0.53）、通气阈值（r=0.67）、最大摄氧量（r=0.54）、峰值自行车功率输出（r=0.54）和最大等长肘伸力量（r=0.55）（P<0.05）存在显著的单变量相关性。与男性相比，女性的 CCR 质量显著较低（P<0.05）。在不同的时间范围内，CCR 质量主要与通气阈值相关，直到前 5 分钟（P<0.05），而 CCR 质量主要与 5 分钟后最大等长肘伸力量相关（P<0.05）。
在医疗保健专业人员中，通气阈值与最初几分钟内的 CCR 质量显著相关。因此，经常参与 CCR 的医疗保健专业人员应努力实现/维持较高的有氧运动能力。
ISRCTN70447230，www.controlled-trials.com/ISRCTN70447230。
