Table 1

Mask leak and delivered ventilation comparing single- and two-person mask ventilation with Laerdal SIB

Single personTwo persons
Mean95% CIMean95% CIDifference95% CI
Mask leak (%)11.56.7 to 16.65.41.9 to 9.86.1**1.5 to 10.7
PIP cm H2O20.118.0 to 22.118.815.9 to 21.81.2−0.8 to 3.3
PEEP cm H2O
TV expired (ml)36.833.2 to 40.435.130.7 to 39.71.6−2.2 to 5.3
Respiratory rate60.855.1 to 66.459.754.9 to 64.41.1−2.2 to 4.3
Inspiratory time (s)0.40.3 to 0.40.40.3 to 0.40.0−0.1 to 0.1
MAP cm H2O6.45.7 to 7.05.94.9 to 6.90.4−0.4 to 1.2
  • ** p<0.01.

  • MAP, mean arterial blood pressure; PEEP, positive end-expiratory pressure; PIP, peak inspiratory pressure; SIB, self-inflating bag; TV, tidal volume.