Differences in Hands-off Time According to the Position of a Second Rescuer When Switching Compression in Pre-hospital Cardiopulmonary Resuscitation Provided by Two Bystanders: A Randomized, Controlled, Parallel Study.
10.3346/jkms.2015.30.9.1347
- Author:
Yong Hwan KIM
1
;
Jun Ho LEE
;
Dong Woo LEE
;
Kwang Won CHO
;
Mun Ju KANG
;
Yang Weon KIM
;
Kyoung Yul LEE
;
Young Hwan LEE
;
Jin Joo KIM
;
Seong Youn HWANG
Author Information
1. Department of Emergency Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea. 3syellow@naver.com
- Publication Type:Original Article ; Randomized Controlled Trial
- Keywords:
Cardiopulmonary Resuscitation;
Manikins
- MeSH:
Cardiopulmonary Resuscitation/methods/*statistics & numerical data;
Clinical Competence/*statistics & numerical data;
Emergency Medical Services/*statistics & numerical data;
Female;
Heart Arrest/epidemiology/*prevention & control;
Heart Massage/methods/*statistics & numerical data;
Humans;
Male;
Republic of Korea/epidemiology;
Treatment Outcome;
Workload/*statistics & numerical data;
Young Adult
- From:Journal of Korean Medical Science
2015;30(9):1347-1353
- CountryRepublic of Korea
- Language:English
-
Abstract:
The change of compressing personnel will inevitably accompany hands off time when cardiopulmonary resuscitation (CPR) is performed by two or more rescuers. The present study assessed whether changing compression by a second rescuer located on the opposite side (OS) of the first rescuer can reduce hands-off time compared to CPR on the same side (SS) when CPR is performed by two rescuers. The scenario of this randomized, controlled, parallel simulation study was compression-only CPR by two laypersons in a pre-hospital situation. Considering sex ratio, 64 participants were matched up in 32 teams equally divided into two gender groups, i.e. , homogenous or heterogeneous. Each team was finally allocated to one of two study groups according to the position of changing compression (SS or OS). Every team performed chest compression for 8 min and 10 sec, with chest compression changed every 2 min. The primary endpoint was cumulative hands-off time. Cumulative hands-off time of the SS group was about 2 sec longer than the OS group, and was significant (6.6 +/- 2.6 sec vs. 4.5 +/- 1.5 sec, P = 0.005). The range of hands off time of the SS group was wider than for the OS group. The mean hands-off times of each rescuer turn significantly shortened with increasing number of turns (P = 0.005). A subgroup analysis in which cumulative hands-off time was divided into three subgroups in 5-sec intervals revealed that about 70% of the SS group was included in subgroups with delayed hands-off time > or = 5 sec, with only 25% of the OS group included in these subgroups (P = 0.033). Changing compression at the OS of each rescuer reduced hands-off time compared to the SS in prehospital hands-only CPR provided by two bystanders.
