Table 3.
Changes of ETCO2 and arterial blood gas analysis.
| Variables | Group | Tind | Tpp40 |
|---|---|---|---|
| ETCO2 (mmHg) | Normocapnia | 34 ± 4 | 30 ± 4 * |
| Hypercapnia | 36 ± 5 | 44 ± 3 * | |
| pH | Normocapnia | 7.44 ± 0.03 | 7.42 ± 0.05 |
| Hypercapnia | 7.42 ± 0.05 | 7.33 ± 0.05 *,† | |
| PaO2 (mmHg) | Normocapnia | 257 ± 61 | 202 ± 54 * |
| Hypercapnia | 263 ± 88 | 206 ± 48 * | |
| PaCO2 (mmHg) | Normocapnia | 37 ± 4 | 38 ± 5 |
| Hypercapnia | 40 ± 6 | 50 ± 6 *,† | |
| Vd/Vt (%) | Normocapnia | 12 ± 9 | 23 ± 8 * |
| Hypercapnia | 13 ± 9 | 16 ± 6 *,† |
Values are presented as mean ± SD. Tind, 10 min after anesthesia induction; Tpp40, 40 min after the induction of pneumoperitoneum; ETCO2, end-tidal carbon dioxide tension; Vd/Vt alveolar dead space ratio. * p < 0.05, vs. Tind within the group. † p < 0.05, vs. normocapnia group.