Table 4.
Median difference in the percentage of total possible expired tidal volume between sexes and experience levels within the strata of 3 bag-valve-mask hand-sealing techniques.
| 1-Handed BVM* | 2-Handed BVM | Modified 2-Handed BVM | ||||
|---|---|---|---|---|---|---|
| Comparisons | Median Difference, % | 95% CI | Median Difference, % | 95% CI | Median Difference, % | 95% CI |
| Female-male (all 5 min) | −35 | (−53 to −17) | −10 | (−21 to −3) | −5 | (−12 to 1) |
| Female-male (first 4 min) | −37 | (−55 to −20) | −10 | (−21 to −2) | −5 | (−12 to 1) |
| Female-male (first 3 min) | −41 | (−57 to −19) | −10 | (−20 to −2) | −4 | (−11 to 1) |
| Female-male (first 2 min) | −42 | (−60 to −18) | −9 | (−18 to −2) | −4 | (−9 to 0) |
| Female-male (first 1 min) | −40 | (−60 to −17) | −10 | (−18 to −3) | −4 | (−8 to 2) |
| Inexperienced-experienced (all 5 min)† | −0 | (−16 to 16) | −4 | (−14 to 5) | −6 | (−14 to 1) |
| Inexperienced-experienced (first 4 min) | 0 | (−14 to 18) | −4 | (−13 to 4) | −6 | (−14 to 0) |
| Inexperienced-experienced (first 3 min) | 0 | (−15 to 16) | −3 | (−12 to 4) | −6 | (−14 to 0) |
| Inexperienced-experienced (first 2 min) | −3 | (−17 to 15) | −2 | (−10 to 4) | −5 | (−12 to 0) |
| Inexperienced-experienced (first 1 min) | −1 | (−17 to 17) | 1 | (−6 to 8) | −4 | (−9 to 2) |
CI, confidence interval.
*
One subject was missing data on 1-handed BVM because of a failure in the recording instrument transmitting data during the session; thus, only 51 subjects were analyzed.
†
Experienced subjects defined as having performed BVM ventilation in 5 or more patients in emergency situations.