TABLE 3.
Arterial blood gas data in post-anaesthesia induction and 1st hour postoperative times
| Factor | PVI group (n = 33) | Conventional group (n = 33) | Mean difference (95% CI) | P-value | |
|---|---|---|---|---|---|
| PH | |||||
| T1 | 7.4 ± 0.04 | 7.4 ± 0.04 | 0.0003 (–0.02:0.02) | 0.976 | |
| T2 | 7.3 ± 0.04 | 7.1 ± 1.22 | 0.22 (–0.21:0.65) | 0.307 | |
| Change | –0.05 ± 0.03** | –0.27 ± 1.22 | 0.22 (–0.22:0.65) | 0.314 | |
| PaO2 (mmHg) | |||||
| T1 | 266.8 ± 83.05 | 290.7 ± 56.68 | –23.90 (–58.07:10.25) | 0.177 | |
| T2 | 81.4 ± 13.87 | 83.4 ± 8.78 | –2 (–6.91:2.91) | 0.486 | |
| Change | –185.36 ± 74.53** | –207.27 ± 56.14** | 21.91 (-10.67: 54.49) | 0.180 | |
| PaCO2 (mmHg) | |||||
| T1 | 38.05 ± 5.14 | 37.04 ± 3.68 | 1.012 (–1.09:3.11) | 0.333 | |
| T2 | 41.84 ± 5.96 | 41.89 ± 3.88 | –0.048 (–2.16:3.11) | 0.963 | |
| Change | –3.79 ± 4.84** | 4.88 ± 4.22** | –1.06 (–3.24:1.12) | 0329 | |
| HCO3 (mmol • L–1) | |||||
| T1 | 24.9 ± 2.24 | 24.6 ± 2.55 | 0.31 (–1.03:1.66) | 0.598 | |
| T2 | 22.8 ± 1.8 | 22.5 ± 1.96 | 0.32 (–0.69:1.33) | 0.491 | |
| Change | –2.15 ± 2.04 | –2.17 ± 2.00** | 0.009 (–1.04:1.06) | 0.986 | |
| Haemoglobin g • dL–1 | |||||
| T1 | 12.1 ± 1.4 | 12 ± 0.84 | 0.060 (–0.48:0.61) | 0.832 | |
| T2 | 11.4 ± 1.31 | 11.3 ± 0.77 | 0.079 (–0.43:0.58) | 0.767 | |
| Change | –0.70 ± 0.47** | –0.72 ± 0.39** | 0.018 (–0.19:0.22) | 0.858 | |
| Blood lactate level (mmol • L–1) | |||||
| T1 | 1.63 ± 0.59 | 1.38 ± 0.40 | 0.25 (–0.005:0.50) | 0.055 | |
| T2 | 2.47 ± 1.07 | 2.21 ± 0.98 | 0.26 (–0.22:00.74) | 0.270 | |
| Change | 0.84 ± 0.73** | 0.82 ± 0.74** | 0.015 (–0.32:0.35) | 0.926 | |
Data are presented as mean ± standard deviation and mean difference (95% CI).
**
Represents significant P-value compared to T1.
P-value ≤ 0.05 is statistically significant.
T1 – post-anaesthesia induction, T2 – postoperative, PVI – plethysmographic variability index, PaO2 – partial pressure of oxygen, PaCO2 – partial pressure of carbon dioxide