Table 1.
NIPPV requirements and respiratory rates
| Time | NIPPV used | Set NIPPV rate | Mechanically assisted RR | Spontaneous RR | Total RR |
|---|---|---|---|---|---|
| n (%) | (inflations/min) a | (breaths/min) | (breaths/min) | (breaths/min) | |
| Initial | 10 (100) | 30 ± 0 | 25 ± 9.2 | 24 ± 24 | 50 ± 20 |
| Pre-CPAP | 10 (100) | 30 ± 0 | 26 ± 8.9 | 21 ± 31 | 47 ± 25 |
| 15 min post-CPAP | 5 (50) | 15 ± 14 | 3.9 ± 5.9b | 39 ± 30 | 43 ± 30 |
| 30 min post-CPAP | 6 (60) | 23 ± 11 | 14 ± 14 | 34 ± 30 | 48 ± 25 |
| 45 min post-CPAP | 6 (60) | 26 ± 10 | 14 ± 14 | 39 ± 32 | 52 ± 22 |
| 60 min post-CPAP | 4 (40) | 22 ± 20 | 8.8 ± 16b | 41 ± 30 | 50 ± 22 |
| 90 min post-CPAP | 3 (30) | 33 ± 6.0 | 8.9 ± 14 | 49 ± 30 | 58 ± 25 |
| 120 min post-CPAP | 1 (10) | 46 ± 0 | 4.6 ± 15b | 55 ± 21b | 60 ± 20 |
| 150 min post-CPAP | 2 (20) | 31 ± 1.4 | 4.7 ± 10b | 56 ± 24b | 61 ± 15 |
Values for NIPPV requirements and respiratory rates at each time point; mean ± SD unless stated. Respiratory rate (RR) counted in a 2-min window; reported values are for all lambs, whether or not receiving NIPPV. See text for definition of mechanically assisted breath. aReported value for set NIPPV rate includes only lambs receiving NIPPV. bDiffers from pre-CPAP value, P < 0.05, ANOVA with Dunnett’s post hoc test.