Table 2. Outcomes of PEG placement using CO2 vs. ambient air for insufflation.
| CO2 | Ambient Air | P value | |
| Pneumoperitoneum (N,%) | 0.05 | ||
| Free Air | 2 (14.3 %) | 8 (53.3 %) | |
| No Free Air | 12 (85.7 %) | 7 (46.7 %) | |
| Pneumoperitoneum grade (N) | 0.65 | ||
| Small | 1 | 4 | |
| Moderate | 1 | 2 | |
| Large | 0 | 2 | |
| Abdominal girth | |||
| Change in circumference (cm) Mean ± SD | 3.1 ± 3.1 cm | 3.3 ± 2.5 cm | 0.85 |
| Pain VAS (mean ± SD) | 4.3 ± 3.0 | 2.2 ± 2.4 | 0.12 |
| Bloating VAS (mean ± SD) | 2.8 ± 3.0 | 1.9 ± 2.0 | 0.46 |
| Procedure duration and sedation | |||
| Mean procedure time (mins) | 13.0 ± 10.5 | 12.5 ± 8.2 | 0.88 |
| Fentanyl (mcg) mean ± SD | 43 ± 32 | 47 ± 19 | 0.66 |
| Propofol (mg) mean ± SD | 175 ±119 | 163 ± 54 | 0.69 |
PEG, percutaneous endoscopic gastrostomy; VAS, visual analog scale