Table 2
Values (median with 20th and 80th percentiles) of blood gases and ventilator settings before and after initiation of nHFV
| Before | After | ||||||
|---|---|---|---|---|---|---|---|
| n=19 | n=21 | n=21 | n=14 | n=15 | n=15 | ||
| Time (h) | −4.15’ (−6.25’– −3.28’) | −0.57’ (−1.57’– −0.34’) | 1.30’ (0.50’–2.00’) | 4.24’ (3.20’–5.20’) | 7.38’ (6.52’–8.00’) | 11’ (10.00’–13.00’) | |
| pH | 7.24 (7.20–7.28) | 7.24 (7.19–7.29) | 7.26 (7.24–7.32) | 7.28 (7.24–7.32) | 7.31 (7.24–7.42) | 7.31 (7.27–7.36) | |
| pCO2 (kPa) | 8.0 (7.3–8.9) | 8.3 (7.4–9.1) | 7.2 (6.6–8.3)2-150 | 7.1 (6.5–7.9)2-150 | 6.5 (5.7–7.9)¶ | 6.7 (5.9–7.4)¶ | |
| Pāw (cm H2O) | 5 (5–6) | 6 (5–7) | 7 (6–8.6)§ | 7 (6–8)§ | 7 (6–8)§ | 7 (6–8)§ | |
| Amplitude (cm H2O) | 37 (29–46) | 35 (28–47) | 35 (29–47) | 35 (28–48) | |||
| FIO2 | 0.35 (0.21–0.5) | 0.42 (0.21–0.60) | 0.40 (0.21–0.60) | 0.40 (0.21–0.50) | 0.37 (0.21–0.51) | 0.32 (0.21–0.51) | |
-
↵2-150 pCO2 was significantly different (Wilcoxon p<0.005) from pCO2 in the two blood gases registered before nHFV was initiated. ¶pCO2 was significantly different (Wilcoxon p<0.01) from pCO2 in the two blood gases registered before nHFV. §Pāw settings after the start of nHFV were significantly different (Wilcoxon p<0.01) from each of the two Pāw pressure values registered before nHFV was initiated.
