Table 2.
Baseline characteristics
| Variable | CFT group (N = 38) | USP group (N = 38) | p-value |
|---|---|---|---|
| Age, year, median | 66 (58 to 71) | 64 (52 to 73) | 0.5503 |
| Male, N (%) | 17 (44.7%) | 24 (63.2%) | 0.1072 |
| BMI, kg/m2 | 26.50 ± 5.02 | 27.91 ± 5.4 | 0.2424 |
| ASA 3, N (%) | 17 (44.7%) | 14 (36.8%) | 0.4838 |
| Hypertension, N (%) | 27 (71.1%) | 24 (63.2%) | 0.4639 |
| Congestive heart failure, N (%) | 7 (18.4%) | 7 (18.4%) | 1.0000 |
| COPD, N (%) | 3 (7.9%) | 2 (5.3%) | 1.0000 |
| Cerebrovascular disease (past TIA/stroke), N (%) | 2 (5.3%) | 3 (7.9%) | 1.0000 |
| Creatinine, median, μmol/l | 79 (66 to 101) | 80 (64 to 94) | 0.4619 |
| HEART score, median (IQR) | 3 (3 to 4) | 3 (2 to 4) | 0.0908 |
| Preinduction systolic blood pressure, mmHg | 140.9 ± 17.7 | 134.7 ± 23.8 | 0.2002 |
| Preinduction MAP, mmHg | 103.3 ± 11.6 | 99.9 ± 16.9 | 0.3119 |
| Epidural in place, N (%) | 13 (34.2%) | 8 (21.1%) | 0.1996 |
| Propofol, mg | 134 ± 26 | 136 ± 30 | 0.7466 |
| Arterial cannula in place prior to induction, N (%) | 8 (21.6%) | 6 (15.8%) | 0.5169 |
| Surgical procedures | |||
| Upper GI tract, N (%) | 8 (21.1%) | 10 (26.3%) | 0.5895 |
| Hepato-pancreato-biliary, N (%) | 12 (31.7%) | 6 (15.8%) | 0.1055 |
| Colorectal, N (%) | 16 (42.1%) | 21 (55.3%) | 0.2512 |
| Other, N (%) | 2 (5.3%) | 1 (2.6%) | 1.0000 |
| Laparoscopy, N (%) | 17 (44.7%) | 16 (42.1%) | 0.8170 |
| Duration of surgery, min, median | 155 (118 to 240) | 164.5 (120 to 220) | 0.9526 |
ASA American Society of Anesthesiology, BMI body mass index, CFT conventional fluid therapy, COPD chronic obstructive pulmonary disease, GI gastrointestinal, MAP mean arterial pressure, USP ultrasound-based protocol