Abstract 101: Use of Audible and Visual Feedback During 1 Minute of Continuous Chest Compressions
Background: In order to obtain an adequate coronary perfusion pressure in cardiopulmonary resuscitation (CPR) is extremely important to perform quality chest compressions. The use of mechanisms of feedback throughout the CPR’s maneuvers has contributed to the improvement of such.
Hypothesis: We hypothesized that the quality of chest compressions performed using feedback of deepness, frequency and hand position are superior to those without feedback.
Methods: The volunteers were first year medical student and were given a Family & Friends® CPR course and after were randomly divided in two groups. Each group accomplished one minute of continuous chest compressions in Resusciane with PC Skillreporter System’s manikin. Group A performed compressions without any feedback and Group B used feedback of frequency (metronome at 110 bpm), deepness (compressions’ graphic) and correct hand position’s (visual indicator).
Results: Group A and Group B had respectively 57 vs. 54 volunteers, 37% vs. 45% of those were male (p=0,267), age average of 19,8 ±2 vs. 21,2 ±3 years (p=0,072) and body mass index of 23,1 ±3 vs. 23,4 ±3 kg/m2 (p=0,384). Comparing the performance during one minute of chest compressions of Group A and B the following results were obtained: average of total compressions (126 ±18 vs. 120 ±15 compressions, p=0,10), average rate (124 ±18 vs. 111 ±4 compressions/minute, p=0,001), average depth (44 ±10 vs. 52 ±6 mm, p<0,001), percentage average of compressions with adequate depth (41,4% ±43 vs. 70,0% ±37, p= 0,009), average of compressions with correct hand position (92% ±27 vs. 98% ±8, p=0,117) and percentage average of chest compressions without error (37,1% ±41 vs. 64,5% ±36, p=0,008).
Conclusion: Significant differences between the two groups were obtained in parameters such as average depth, compressions with adequate depth and chest compressions with no error when compared. These parameters are very important for perform efficient chest compressions and adequate CPR demonstrating that mechanisms of feedback can contribute to improve coronary perfusion pressure during CPR and consequently to a better survival rate.
- © 2012 by American Heart Association, Inc.