TY - JOUR
T1 - Evaluation of a Novel Basic Life Support Method in Simulated Microgravity
AU - Rehnberg, Lucas
AU - Russomano, Thais
AU - Falcao, Felipe
AU - Campos, Fabio
AU - Evetts, Simon N.
PY - 2011/2
Y1 - 2011/2
N2 - REHNBERG L, RUSSOMANO T, FALCAO F, CAMPOS F, EVETTS SN. Evaluation of a novel basic life support method in simulated microgravity. Aviat Space Environ Med 2011; 82:104-10. Background: It a cardiac arrest occurs in microgravity, current emergency protocols aim to treat patients via a medical restraint system within 2-4 min. It is vital that crewmembers have the ability to perform single-person cardiopulmonary resuscitation (CPR) during this period, allowing time for advanced life support to be deployed. The efficacy of the Evetts-Russomano (ER) method has been tested in 22 s of microgravity in a parabolic flight and has shown that external chest compressions (ECC) and mouth-to-mouth ventilation are possible. Methods: There were 21 male subjects who performed both the ER method in simulated microgravity via full body suspension and at +1 G(z). The CPR mannequin was modified to provide accurate readings for ECC depth and a metronome to set the rate at 100 bpm. Heart rate, rate of perceived exertion, and angle of arm flexion were measured with an ECG, elbow electrogoniometers, and Borg scale, respectively. Results: The mean (+/- SD) depth of FCC in simulated microgravity was lower in each of the 3 min compared to +1 G(z). The ECC depth (45.7 +/- 2.7 mm, 42.3 +/- 5.5 mm, and 41.4 +/- 5.9 mm) and rate (104.5 +/- 5.2, 105.2 +/- 4.5, and 102.4 +/- 6.6 compressions/min), however, remained within CPR guidelines during simulated microgravity over the 3-min period. Heart rate, perceived exertion, and elbow flexion of both arms increased using the ER method. Conclusion: The ER method can provide adequate depth and rate of ECC in simulated microgravity for 3 min to allow time to deploy a medical restraint system. There is, however, a physiological cost associated with it and a need to use the flexion of the arms to compensate for the lack of weight.
AB - REHNBERG L, RUSSOMANO T, FALCAO F, CAMPOS F, EVETTS SN. Evaluation of a novel basic life support method in simulated microgravity. Aviat Space Environ Med 2011; 82:104-10. Background: It a cardiac arrest occurs in microgravity, current emergency protocols aim to treat patients via a medical restraint system within 2-4 min. It is vital that crewmembers have the ability to perform single-person cardiopulmonary resuscitation (CPR) during this period, allowing time for advanced life support to be deployed. The efficacy of the Evetts-Russomano (ER) method has been tested in 22 s of microgravity in a parabolic flight and has shown that external chest compressions (ECC) and mouth-to-mouth ventilation are possible. Methods: There were 21 male subjects who performed both the ER method in simulated microgravity via full body suspension and at +1 G(z). The CPR mannequin was modified to provide accurate readings for ECC depth and a metronome to set the rate at 100 bpm. Heart rate, rate of perceived exertion, and angle of arm flexion were measured with an ECG, elbow electrogoniometers, and Borg scale, respectively. Results: The mean (+/- SD) depth of FCC in simulated microgravity was lower in each of the 3 min compared to +1 G(z). The ECC depth (45.7 +/- 2.7 mm, 42.3 +/- 5.5 mm, and 41.4 +/- 5.9 mm) and rate (104.5 +/- 5.2, 105.2 +/- 4.5, and 102.4 +/- 6.6 compressions/min), however, remained within CPR guidelines during simulated microgravity over the 3-min period. Heart rate, perceived exertion, and elbow flexion of both arms increased using the ER method. Conclusion: The ER method can provide adequate depth and rate of ECC in simulated microgravity for 3 min to allow time to deploy a medical restraint system. There is, however, a physiological cost associated with it and a need to use the flexion of the arms to compensate for the lack of weight.
U2 - 10.3357/ASEM.2856.2011
DO - 10.3357/ASEM.2856.2011
M3 - Article
VL - 82
SP - 104
EP - 110
JO - Aviation Space and Environmental Medicine
JF - Aviation Space and Environmental Medicine
IS - 2
ER -