Quality of CPR Indicator N = 15 | No feedback | Auditory Feedback | Visual Feedback |
---|---|---|---|
Percent Correct Compressions [correct depth, rate, and release] | 44.5 ± 8.1a (27.1-61.8) | 65.4 ± 7.6 (40.1-72.7) | 78.1 ± 8.2 (60.4-95.7) |
N who achieved 90% or better | 2 (13%) | 1 (6%) | 9 (60%) |
Average Rate of Compressions [number per minute] | 96.5 ± 0.7 (95.2-97.8) | 87.9 ± 0.5 b (86.9-88.9) | 94.9 ± 0.7 (93.5-96.4) |
N with rate between 90 and 120 c | 8 (53%) | 8 (53%) | 8 (53%) |
Percent compressions with 38 or more mm depth | 55.5 ± 8.9 d (36.4-74.7) | 80.5 ± 6.0 (67.6-93.4) | 95.4 ± 1.9 (91.3-99.5) |
N who achieved 90% or better | 3 (20%) | 4 (27%) | 13 (86%) |
Average depth of compressions (mm) | 39.2 ± 0.5 e (35.3-43.1) | 41.4 ± 0.3 38.4-44.3) | 42.2 ± 0.3 (38.8-45.5) |
N who achieved 38-50 mm | 9 (60%) | 13 (86%) | 13 (86%) |
Percent compressions without full release of pressure | 0.7 ± 0.3 (0.02-1.3) | 23.4 ± 6.2f (10.1-36.8) | 0.8 ± 0.5 (0.44-2.0) |
N with 5% or more of compressions without full release | 0 | 11 (73%) | 0 |
Average duty-cycle | 46.1 ± 2.1 (41.5-50.7) | 39.4 ± 1.6g (35.9-42.9) | 42.5 ± 1.1 (40.2-44.8) |
N with range .30-.50 | 14 (93%) | 13 (86%) | 15(100%) |