Table 2.
Comparison of demographic data, intraoperative haemodynamic characteristics, estimated blood loss, and needs for blood transfusion between patients using mean arterial pressure (MAP) targets
| Total bimax | MAP <60 mmHg | MAP >60 mmHg | P |
|---|---|---|---|
| (269) | (48) | (221) | |
| Sex | <0.001 | ||
| Male | 15 (31.3%) | 135 (61.1%) | |
| Female | 33 (68.8%) | 86 (38.9%) | |
| Age (yr) | 22.5±5.0 | 23.9±5.0 | 0.084 |
| Weight (kg) | 55.1±8.7 | 63.6±11.7 | <0.001 |
| BMI | 20.6±2.5 | 22.2±3.4 | <0.001 |
| ASA | 0.081 | ||
| I | 41 (85.4%) | 154 (69.7%) | |
| II | 7 (14.6%) | 65 (29.4%) | |
| III | 0 (0%) | 2 (0.9%) | |
| Surgery duration (min) | 349.7±70.4 | 378.7±101.2 | 0.020 |
| Anesthesia methods | 0.946 | ||
| TIVA | 6 (12.5%) | 24 (10.9%) | |
| VA w. remifentanil | 41 (85.4%) | 192 (86.9%) | |
| VA only | 1 (2.1%) | 5 (2.3%) | |
| Use of intraarterial line | 23 (47.9%) | 96 (43.4%) | 0.571 |
| Hypotensive technique | |||
| GTN | 2 (4.2%) | 8 (3.6%) | 0.858 |
| Beta-blocker | 15 (31.3%) | 80 (36.4%) | 0.502 |
| Hydralazine | 2 (4.2%) | 13 (5.9%) | 0.639 |
| Pulse rate (per min) | 75.9±9.0 | 76.9±9.2 | 0.505 |
| Mean MAP (mmHg) | 58.1±1.6 | 65.8±4.1 | <0.001 |
| Mean SBP (mmHg) | 88.4±6.1 | 95.6±7.0 | <0.001 |
| Mean DBP (mmHg) | 46.9±4.8 | 52.6±5.6 | <0.001 |
| Preop Hb (g/dL) | 13.2±1.5 | 14.1±1.4 | 0.001 |
| Postop Hb (g/dL) | 11.1±1.3 | 11.7±1.5 | 0.004 |
| IV. Fluids (mL) | 2539.6±701.5 | 2668.8±910.5 | 0.278 |
| EBL (mL) | 874.4±385.3 | 999.6±508.0 | 0.058 |
| No. who required transfusion | 39 (81.3%) | 130 (58.8%) | 0.004 |
| Autologous blood products | 31 (64.6%) | 102 (46.2%) | 0.021 |
| Volume of transfusion (mL) | 335.7±209.1 | 310.1±313.4 | 0.488 |
| Length of hospital stay (h) | 62.4±14.5 | 62.0±15.6 | 0.884 |
* TIVA - total intravenous anesthesia, VA - inhalational anesthesia, BMI - body mass index, ASA - American Society of Anesthesiologists (ASA) physical status classification system, GTN - glyceryltrinitrate, SBP - systolic blood pressure, DBP - diastolic blood pressure, Hb - haemoglobin, EBL - estimated blood loss, Bimax - bimaxillary surgery, preop-preoperative, postoppostoperative. Data presented as mean±standard deviation (SD) or number (proportion). P<0.05 means statistically significant