Table 1. ABG measurements obtained at 1.5 hours and 3 hours post-occlusion during RA or NBO and at baseline and at end of MRI (final) studies during RA.
| Baseline (24±8 minutes) |
1.5 Hours ABG (98±7 minutes) N=8 |
3 Hours ABG (177±23 minutes) N=6 |
Final ABG (251±34 minutes) N=7 | |||
|---|---|---|---|---|---|---|
| RA | RA | NBO | RA | NBO | RA | |
| pH | 7.37±0.03 | 7.33±0.03a,f | 7.32±0.03e,j | 7.34±0.02g | 7.34±0.02 | 7.37±0.02 |
| pCO2 (mm Hg) | 34.9±5.6 | 37.4±5.5 | 41.3±6.5 | 38.2±6.1 | 39.6±4.8 | 44.1±6.5 |
| pO2 (mm Hg) | 93.6±16.1 | 88.2±7.7 | 312±98d,h,k | 84.1±8.0 | 355±44d,h,k | 84.9±16.3 |
| MABP (mm Hg) | 99.0±14.2n | 75.8±11.7b | 101±12.1i,l | 79.7±5.8c | 96.7±11.1m | 81.8±15.5 |
ABG, arterial blood gas; MABP, mean arterial blood pressure; MCAO, middle cerebral artery occlusion; MRI, magnetic resonance image; NBO, normobaric oxygen; RA, room air.
Values are shown as mean±standard deviation. Values in parentheses are the time the ABG was acquired post-MCAO. aP=0.002, bP=0.003, cP=0.05 RA vs. baseline; dP<0.0001, eP=0.04 NBO vs. baseline; fP=0.001, gP=0.04 RA vs. final; hP<0.0001, iP=0.008, jP=0.02 NBO vs. final; kP<0.0001, lP=0.001, mP=0.04 NBO vs. RA, nP=0.01 baseline vs. final.