Table 1. Pre- and postoperative levels of ETCO2, PCO2, PO2, Ph, TOS, TAS and OSI in dogs undergoing open or laparoscopic ovariectomy.
| Parameters | Group | Preoperative | Postoperative | P |
|---|---|---|---|---|
| ETCO2 (mm Hg) | Open | 46 (2.54) | 48 (3.04) | NS |
| Laparoscopy | 44 (2.05) | 47.5 (3.47) | NS | |
| PCO2 (mm Hg) | Open | 35.9 (2.22) | 38.6 (3.31) | NS |
| Laparoscopy | 38.1 (2.16) | 40.5 (2.48) | NS | |
| PO2 (mm Hg) | Open | 504.6 (15.96) | 510.3 (21.34) | NS |
| Laparoscopy | 546.3 (36.58) | 593.3 (27.26) | NS | |
| pH | Open | 7.36 (0.05) | 7.34 (0.08) | NS |
| Laparoscopy | 7.38 (0.06) | 7.36 (0.05) | NS | |
| TOS (μmol H2O2/l) | Open | 11.5 (2.62) | 34.52 (8.60) | 0.002* |
| Laparoscopy | 10.9 (2.24) | 22.34 (3.69) | 0.002*, 0.009** | |
| TAS (mmol Trolox equiv/l) | Open | 4.3 (1.17) | 3.38 (1.15) | NS |
| Laparoscopy | 4.27 (1.30) | 3.12 (1.36) | NS | |
| OSI (arbitrary unit) | Open | 2.7 (0.48) | 10.3 (1.74) | 0.002* |
| Laparoscopy | 2.9 (1.47) | 9.21 (5.93) | 0.009* | |
Median (inter-quartile range), Open, open ovariectomy group; Laparoscopy, laparoscopic ovariectomy group. ETCO2, end-tidal CO2; TOS, total oxidant status; TAS, total antioxidant status; OSI, oxidative stress index; NS, not significant. *Statistically difference compared to “preoperative” (n=6). **Statistically difference compared to open surgery group (n=6).