Table 1.
Demographic and perioperative characteristics of patients.
| Variable | Combined (n = 90) | Hypotensive group (n = 31) | Normotensive group (n = 59) | P -Value |
|---|---|---|---|---|
| Age, years | 52.0 ± 11.0 | 54.4 ± 9.9 | 50.7 ± 11.0 | 0.107 |
| BMI, kg/m2 | 23.2 ± 2.6 | 23.6 ± 2.1 | 23.1 ± 2.8 | 0.515 |
| Female sex, n (%) | 42 (46.7%) | 15 (48.3%) | 27 (45.8%) | 0.813 |
| Bupivacaine, mg | 13.1 ± 1.6 | 13.0± 1.5 | 13.2 ± 1.6 | 0.494 |
| ASA (I/II) | 56/34 | 19/12 | 37/22 | 0.878 |
| Baseline MBP, mmHg | 96.8 ± 6.2 | 99.7 ± 5.1 | 95.3 ± 6.2 | 0.001 |
| Baseline HR, beats/min | 77.8 ± 14.2 | 79.4 ± 12.6 | 76.9 ± 14.9 | 0.434 |
| History of hypertension, n (%) | 20 (22.2%) | 6 (19.4%) | 14 (23.7%) | 0.635 |
| Use of b-blockers, n (%) | 7 (7.8%) | 2 (6.5%) | 5 (8.5%) | 0.733 |
| Use of ACE-inhibitors, n (%) | 11 (12.2%) | 3 (9.7%) | 8 (13.6%) | 0.593 |
| Surgery duration, min | 87.5 ± 18.4 | 85.4 ± 18.9 | 88.5 ± 18.2 | 0.449 |
| dIVCmax, mm | 12.9 ± 2.5 | 11.9 ± 2.0 | 13.4 ± 2.5 | 0.009 |
| IVCCI, % | 40.7 ± 6.9 | 46.1 ± 5.1 | 37.0 ± 6.0 | <0.0001 |
| Type of surgery | ||||
| Lower limb surgery, n (%) | 26 (28.9%) | 8 (25.8%) | 18 (30.5%) | 0.640 |
| Lower abdominal surgery, n (%) | 24 (26.7%) | 8 (25.8%) | 16 (27.1%) | 0.894 |
| Gynecological surgery, n (%) | 11 (12.2%) | 4 (12.9%) | 7 (11.9%) | 0.886 |
| Urology, n (%) | 29 (32.2%) | 11 (35.5%) | 18 (30.5%) | 0.631 |
Data are expressed as means ± SDs, medians [interquartile ranges], or numbers (%). BMI, body mass index; ASA, American Society of Anesthesiologists; dIVCmax, the maximum diameter of IVC; dIVCmin, the minimum diameter of IVC; HR, heart rate; MBP, mean blood pressure; IVCCI, collapsibility index of inferior vena cava.