Table 1.
Group I | Group II | Group III | Group IV | |
---|---|---|---|---|
Age ± SD (Days) | 54.2 ± 2.3 | 55.1 ± 4.2 | 56.3 ± 2.2 | 55.8 ± 3.2 |
Gender (M/F) | 3/0 | 3/0 | 3/0 | 3/0 |
Weight ± SD (Kg) | 28.3 ± 1.6 | 28.9 ± 1.5 | 28.7 ± 1.3 | 28.5 ± 1.7 |
Experimental time (Min) | 180 ± 0** | 180 ± 0 | 83 ± 9.8 | 11.3 ± 2.1 |
Blood pressure (mmHg) | ||||
systolic pressure | 93.3 ± 8.5 | 96 ± 6.2 | 97.7 ± 9.9 | 95 ± 9.2 |
diastolic pressure | 52.7 ± 6.1 | 49 ± 3.6 | 48.3 ± 7.6 | 53.3 ± 8.9 |
Heart rate (n/min) | 69.7 ± 5.1 | 68.3 ± 9.3 | 62.7 ± 6.5 | 66.3 ± 6.7 |
Oxygen saturation (n/%) | 97.7 ± 1.5 | 96.7 ± 3.1 | 96 ± 1 | 97.1 ± 2.1 |
CVP (cm H2O) | 7.2 ± 0.7 | 6.7 ± 0.6 | 6.8 ± 0.4 | 7.1 ± 0.3 |
Cavity temperature (°C) | 22.3 ± 0.6 | 23 ± 1 | 23.3 ± 0.6 | 22.7 ± 0.6 |
ABG | ||||
pCO2 (mmHg) | 22.4 ± 0.8 | 23.9 ± 1.1 | 24.2 ± 1.9 | 24.8 ± 1.7 |
pO2 (mmHg) | 98.7 ± 1.2 | 99 ± 1 | 99.3 ± 0.6 | 99.7 ± 0.6 |
pH | 7.52 ± 0.07 | 7.44 ± 0.07 | 7.46 ± 0.06 | 7.44 ± 0.14 |
RLN | ||||
Amplitude(uv) | 1046 ± 331.9 | 1253 ± 384.5 | 1067 ± 210.6 | 1015 ± 268.8 |
Latency(ms) | 2.09 ± 0.35 | 1.98 ± 0.34 | 2.07 ± 0.19 | 2.12 ± 0.32 |
VN | ||||
Amplitude(uv) | 815.3 ± 217.5 | 859.3 ± 172.3 | 772.3 ± 70.2 | 785 ± 134.4 |
Latency(ms) | 10.09 ± 0.19 | 9.79 ± 0.44 | 9.71 ± 0.19 | 9.75 ± 0.43 |
Group I: intraoperative pressure was kept at 1 times CVP; Group II: intraoperative pressure x2 CVP
Group III: intraoperative pressure x3 times CVP.; Group IV: intraoperative pressure x5 times CVP.
CVP: central venous pressure; ABG: arterial blood gas; RLN: recurrent laryngeal nerve; VN: vagus nerve.
*P < 0.05, **P < 0.01; analysis of the total four groups with Cochran’s and Mantel-Haenszel Chi-square (χCMH2) test, while the variable of side was controlled.