心肺复苏时佩戴N95口罩对胸外按压质量的影响

目的 评估医务人员佩戴N95 口罩进行心肺复苏(cardiopulmonary resuscitation,CPR)对胸外按压质量及疲劳情况的影响.方法 纳入武汉大学中南医院近两年内获得美国心脏协会基础生命支持认证的医护人员80名,复习按压要点并熟悉模型后,通过随机数字法分为两组:佩戴外科口罩组(SM组),佩戴N95 ...

The effects of wearing N95 masks on the quality of chest compressions and fatigue: a randomized manikin study

Objective To evaluate the effects of wearing N95 mask on the quality of chest compression and fatigue.Methods A total of 80 participants from Zhongnan Hospital with basic life support(BLS)certification conferred by American Heart Association(AHA)within two years were enrolled.After reviewing the key points of cardiopulmonary resuscitation(CPR)and grasping the operation on the manikin,they were randomized(random number)into two groups:wearing surgical masks(SM group,n=40)and wearing N95 masks(N95 group,n=40)during CPR.Each participant performed a 2-minute chest compression-only CPR on the manikin.Participants'height,body weight,Borg scores and physiological parameters before and after CPR were recorded.The quality of chest compression(including compression depth,compression rate,adequate depth proportions,adequate rate proportions,hand position and complete chest recoil)were recorded by Laerdal QCPR?software.Student's t test and Mann-Whitney test were used to compare the differences of chest compression quality indexes between the two groups.Results Compared with the SM group,participants in the N95 group had significantly increased median of Borg scores after CPR(16 vs 14,P=0.027),and decreased quality of chest compression,including the decline in compression depth(mean 47 mm vs 52 mm,P=0.020),compression rate(107 times/min vs 118 times/min,P=0.004),complete chest recoil rate(89.8%vs 98.1%,P=0.046),adequate depth proportions(67.4%vs 89.6%,P<0.01)and adequate rate proportions(60.6%vs 74.8%,P<0.01).Conclusions Wearing N95 masks during CPR decreases the quality of chest compression and aggravates rescuers’fatigue.Therefore,it is necessary to exchange rescuers more frequently to ensure the quality of chest compression when wearing N95 masks.