Respiratory mechanics and outcome data for infants in two arms of a randomised trial of resuscitation: standard anaesthetic rebreathing circuit and Dräger Babylog
| Variable | Standard anaesthetic rebreathing circuit (n = 13 unless noted) | Dräger Babylog (n = 11 unless noted) | p Value |
|---|---|---|---|
| “Time recorded” is the entire length of data recording. Mean time for infants on the standard anaesthetic rebreathing circuit (SC) = 20 minutes, and the mean time for those on the Dräger Babylog (DB) = 19 minutes. Summary of respiratory mechanics measurements for 15 infants (8 SC and 7 DB). | |||
| *Values are mean (range). | |||
| †Values are median (range). | |||
| ‡Values are number (%). | |||
| ††Maximum observed intubation time was seven minutes. | |||
| ‡‡Maximum observed intubation time was three minutes. | |||
| ¶Two sample t test. | |||
| §Wilcoxon rank sum test. | |||
| **Fisher’s exact test. | |||
| PEEP, Positive end expiratory pressure; PIP, peak inspiratory pressure; PIE, pulmonary interstitial emphysema; eVt, expiratory tidal volume. | |||
| PEEP (mean for time recorded; cm H2O)* | 5.2 (2.9–7.2) | 7.9 (7.1–8.5) | 0.001¶ |
| PEEP (CV for time recorded)† | 0.62 (0.40–0.98) | 0.12 (0.08–0.40) | 0.002§ |
| PIP (mean for time recorded; cm H2O)* | 24.5 (14.6–36.8) | 24.0 (16.8–31.7) | 0.88¶ |
| PIP (CV for time recorded)† | 0.22 (0.12–0.38) | 0.26 (0.09–0.42) | 0.30§ |
| eVt (mean for time recorded; ml/kg birth weight/breath)* | 9.7 (4.9–15.7) | 9.4 (6.6–14.6) | 0.85¶ |
| eVt (CV for time recorded)† | 0.47 (0.32–0.63) | 0.38 (0.32–0.61) | 0.64§ |
| Age at intubation (minutes)† | 3 (2–94††) | 2 (1–140‡‡) | |
| Pco2 on admission (kPa)† | 6.3 (4.4–15.8) | 5.8 (3.4–9.6) | 0.56§ |
| Fio2 on admission (%)† | 32 (21–100) | 40 (21–100) | 0.84§ |
| Lung area (mm2/kg)* | 1221 (847–1895) n = 12 | 1152 (725–1859) n = 9 | 0.62¶ |
| Mortality‡ | 4 (31%) | 1 (9%) | 0.33** |
| Oxygen at 36 weeks and/or death‡ | 8 (73%) n = 11 | 7 (70%) n = 10 | 1.00** |
| Airleak, PIE, or pneumothorax‡ | 5 (38%) | 1 (9%) | 0.17** |