Is Weight a Pivotal Factor for the Performance of External Chest Compressions on Earth and in Space

TY - JOUR

T1 - Is Weight a Pivotal Factor for the Performance of External Chest Compressions on Earth and in Space

AU - Baers, Justin

AU - Velho, Rochelle

AU - Ashcroft, Alexandra

AU - Rehnberg, Lucas

AU - Baptista, Rafael R

AU - Russomano, Thais

PY - 2016/4

Y1 - 2016/4

N2 - The purpose of this study was to evaluate the role of body weight in the effectiveness of performing 4 sets of 30 external chest compressions (ECCs) over 1.5 min in accordance with the 2010 Cardiopulmonary Resuscitation (CPR) Guidelines, considering gender differences on Earth and a simulation of the hypogravity of Mars. Thirty males and 30 females performed 4 sets of 30 ECCs with a 6-sec interval between sets to allow for ventilation on a CPR mannequin. The heart rate (HR), pneumotachograph readings (VE, VO2 peak), and the rate of perceived exertion (RPE) were measured pre- and post-CPR. The same 30 male volunteers also performed in an additional condition of 0.38 Gz, using the 2010 CPR Guidelines. According to the 2005 CPR Guidelines, set ECC rate and depth were achieved for both genders, and female weight was a strong predictor of true depth, which was below the 2010 CPR Guidelines for the last two ECC sets. VO2 peak showed no interguideline difference, but was greater in the females (18.0 ± 6.5 mL·kg-1·min-1) than in the males (15.6 ± 4.8 mL·kg-1·min-1). Expired ventilation (VE) was greater for 2010 CPR Guidelines (27.4 ± 7.5 L·min-1) compared to 2005 CPR Guidelines (23.1 ± 6.2 L·min-1) with no gender differences.

AB - The purpose of this study was to evaluate the role of body weight in the effectiveness of performing 4 sets of 30 external chest compressions (ECCs) over 1.5 min in accordance with the 2010 Cardiopulmonary Resuscitation (CPR) Guidelines, considering gender differences on Earth and a simulation of the hypogravity of Mars. Thirty males and 30 females performed 4 sets of 30 ECCs with a 6-sec interval between sets to allow for ventilation on a CPR mannequin. The heart rate (HR), pneumotachograph readings (VE, VO2 peak), and the rate of perceived exertion (RPE) were measured pre- and post-CPR. The same 30 male volunteers also performed in an additional condition of 0.38 Gz, using the 2010 CPR Guidelines. According to the 2005 CPR Guidelines, set ECC rate and depth were achieved for both genders, and female weight was a strong predictor of true depth, which was below the 2010 CPR Guidelines for the last two ECC sets. VO2 peak showed no interguideline difference, but was greater in the females (18.0 ± 6.5 mL·kg-1·min-1) than in the males (15.6 ± 4.8 mL·kg-1·min-1). Expired ventilation (VE) was greater for 2010 CPR Guidelines (27.4 ± 7.5 L·min-1) compared to 2005 CPR Guidelines (23.1 ± 6.2 L·min-1) with no gender differences.

KW - Basic Life Support

KW - Cardiopulmonary Resuscitation

KW - External Chest Compression

M3 - Article

SN - 1097-9751

VL - 19

SP - 1

EP - 16

JO - Journal of Exercise Physiology Online

JF - Journal of Exercise Physiology Online

IS - 2

ER -