Purpose: A step stool is an ordinary device to improve the quality of chest compression (CC) during in-hospital cardiopulmonary resuscitation (CPR). We investigated the effect of an inclined step stool on the quality of CC during CPR on a hospital bed.
Methods: We conducted a randomized crossover study of simulation using a manikin. Two different methods of CC were performed and compared: CC using a flat stool and CC using an inclined (20°) stool. Each session of CC was performed for 2 minutes using a metronome at a rate of 110 beats per minute. The primary outcome was the depth of CC. The adequate CC rate, duty cycle, rate of incomplete recoil, and the angle between the arm of the participants and the bed were also measured.
Results: The median value of the mean depth of CC was 50.5 mm (45.0-57.0 mm) in the flat stool group and 54.5 mm (47.0-58.3 mm) in the inclined stool group (P = .014). The adequate CC rate was significantly higher in the inclined stool group (84.2% [37.6%-99.1%] vs 57.0% [15.2%-95.0%]; P = .016). The duty cycle and the rate of incomplete recoil were comparable between the 2 groups. The angles between the arm of the participants and the bed were more vertical in the inclined stool group (84.0° ± 5.2° vs 81.0° ± 4.8°; P = .014).
Conclusion: Using an inclined stool resulted in an improvement in the depth of CC and the adequate CC rate without increasing the rate of incomplete chest recoil.
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