Table 2.
Date, Time | pH | pCO2 (kPa) | pO2 (kPa) | St. HCO3− (mmol/L) | NIV therapy | Clinical status |
---|---|---|---|---|---|---|
27-5-14, 13.18 | 7.31 | 10.10 | 7.65 | 30.2 | IPAP 30, EPAP 6 S/T mode, RR 14 FiO2 0.21 Nasal mask NIV chinstrap nocte, and 2×2 h daytime |
Sample off NIV. Trial of mouthpiece ventilation after this: mode MPV PC, IPAP 34, EPAP 0, RR 0, FiO2 0.21 |
24-6-14, 11.38 | 7.32 | 8.35 | 9.09 | 26.9 | Nocte as above. Daytime MPV: Mode MPV PC IPAP 34, EPAP 0 RR 0, FiO2 0.21. |
Arterial blood taken off NIV and on room air |
24-6-14, 13.11 | 7.43 | 6.13 | 5.13 | 28.2 | 30 min MPV use as above (FiO2 0.21) |
Note: Venous blood taken for other clinical reasons. Patient reports reduced work of breathing on MPV |
EPAP, expiratory positive airway pressure; measured in cm H2O; IPAP, inspiratory positive airway pressure; MPV, mouthpiece ventilation; NIV, non-invasive ventilation; S/T, spontaneous-timed mode; RR, respiratory rate (breaths per minute).