Table 2. Intraoperative measures and procedures.
| Variables | Minor surgery group | Major surgery group | P |
|---|---|---|---|
| Respiratory rate mean (min−1)† | 17.43±4.50 | 13.31±3.74 | <0.001 |
| Respiratory rate highest (min−1)† | 25.82±6.86 | 20.28±6.04 | <0.001 |
| Respiratory rate lowest (min−1)† | 10.61±4.71 | 6.10±3.58 | <0.001 |
| SpO2 mean (%) | 95.72±2.46 | 96.11±2.20 | 0.442 |
| etCO2 mean (mmHg)‡ | 37.56±7.31 | 48.42±10.09 | <0.001 |
| Laryngeal mask (yes/no) | 11/37 (22.9%/77.1%) | 25/15 (62.5%/37.5%) | <0.001 |
| TEA (yes/no) | 9/39 (18.8%/81.3%) | 28/12 (70%/30%) | <0.001 |
| PVB (yes/no) | 15/33 (31.3%/68.8%) | 19/21 (47.5%/52.5%) | 0.119 |
| ESPB (yes/no) | 10/38 (20.8%/79.2%) | 1/39 (2.5%/97.5%) | 0.010 |
| VB (yes/no) | 16/32 (33.3%/66.7%) | 38/2 (95%/5%) | <0.001 |
| Sufentanil (μg) | 11.20±8.14 | 20.10±19.76 | 0.010 |
| Tranexamic acid (yes/no) | 3/45 (6.3%/93.8%) | 7/33 (17.5%/82.5%) | 0.175 |
| Transfusion (yes/no) | 0/48 (0%/100%) | 0/40 (0%/100%) | 1.000 |
| Fluid administration (mL) | 528.13±249.45 | 963.75±578.46 | <0.001 |
| Catecholamins (yes/no) | 3/45 (6.3%/93.7%) | 18/22 (45%/55%) | <0.001 |
| Conversion (yes/no) | 1/47 (2.1%/97.9%) | 5/35 (12.5%/87.5%) | 0.088 |
| Operative time (min) | 35.96±17.02 | 124.05±74.49 | <0.001 |
Continuous data are presented as mean ± standard deviation (SD) and categoric variables as number (frequency and/or%). P<0.05 is considered significant. A few respiratory rate values were missing due to failed documentation. In these cases, oxygen masks sampling etCO2 were not connected to patient data management system or revealed no reliable data. †, minor n=44, major n=39; ‡, minor n=27, major n=31. SpO2, peripheral oxygen saturation; etCO2, end-tidal carbon dioxide partial pressure; TEA, thoracic epidural analgesia; PVB, paravertebral block; ESPB, erector spinae plane block; VB, vagal nerve block.