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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)

From: CPR with restricted patient access using alternative rescuer positions: a randomised cross-over manikin study simulating the CPR scenario after avalanche burial

Position Standard Over-head Straddle All positions p values
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 p = 0.031
Pocket mask n = 10 (3.7%)a n = 1 (0.4%)a n = 6 (2.5%)a n = 17 (2.2%)a p = 0.034
Both techniques n = 46 (9.6%)a n = 48 (9.5%)a n = 23 (5.5%)a n = 117 (8.4%)a p = 0.045
Hands-off time > 9 s
Mouth-to-mouth n = 46 (45.54%) n = 45 (43.7%) n = 45 (42.5%) n = 136 (43.9%) p = 0.904
Pocket mask n = 29 (28.16%) n = 29 (28.2%) n = 34 (33.3%) n = 92 (29.9%) p = 0.646
All positions n = 75 (36.8%) n = 74 (35.9%) n = 79 (38.0%) n = 228 (36.9%) p = 0.909
  1. 1400 ventilations were analysed (478 in standard position, 503 in OTH position and 419 in STR position). The number of ventilations available for analysis failed to reach the number of ventilations required by guidelines (2250), because some ventilations were too small to be detected
  2. a% Percentage of gastric insufflation detected in the specific group