Table 3 Incidence of gastric insufflation during 2250 attempts at ventilation (A) and incidence of hands-off times exceeding 9 s during 750 consecutive CPR cycles (B)

Gastric insufflation

Mouth-to-mouth

n = 36 (17.6%)^a

n = 47 (19.2%)^a

n = 17 (9.9%)^a

n = 100 (16.1%)^a

Pocket mask

n = 10 (3.7%)^a

n = 1 (0.4%)^a

n = 6 (2.5%)^a

n = 17 (2.2%)^a

Both techniques

n = 46 (9.6%)^a

n = 48 (9.5%)^a

n = 23 (5.5%)^a

n = 117 (8.4%)^a

Hands-off time > 9 s

Mouth-to-mouth

n = 46 (45.54%)

n = 45 (43.7%)

n = 45 (42.5%)

n = 136 (43.9%)

Pocket mask

n = 29 (28.16%)

n = 29 (28.2%)

n = 34 (33.3%)

n = 92 (29.9%)

All positions

n = 75 (36.8%)

n = 74 (35.9%)

n = 79 (38.0%)

n = 228 (36.9%)