Table 1 Characteristics of patients included in analysis (n = 69)
Characteristics | |
|---|---|
Age, yr | 57 (14) |
Sex, Female, n (%) | 35 (51) |
ASA physical status (%) | |
1 | 1 (2) |
2 | 21 (30) |
3 | 47 (68) |
BMI, kg.m −2 | 26 (5) |
Body weight, kg | 72 (16) |
Ideal body weight, kg | 62 (7) |
Comorbidities | |
Chronic hypertension | 11 (16) |
Diabetes | 1 (1) |
Tabacco | 21 (30) |
Alcohol consumption | 5 (7) |
Stable cardiovascular disease | 3 (4) |
Stable pulmonary disease | 13 (19) |
Treatment, n (%) | |
Antihypertensive | 11 (16) |
Including CEI/ARBs | 10 (15) |
Position, n (%) | |
Supine position | 46 (67) |
Partial lateral decubitus | 23 (33) |
Surgery, n (%) | |
Brain tumor | 58 (84) |
Aneurysm | 6 (9) |
Others | 5 (7) |
Length of surgery, h | 3 (1) |
Tidal volume of ideal body weight (ml.kg −1 ) | 7.2 (0.7) |
Ventilatory frequency (cycles.min −1 ) | 14 [12 – 1] |
PEEP (cmH 2 0) | 6 [5, 6] |
Number of patients receiving | |
1 fluid challenge, n | 41 |
2 fluid challenges, n | 19 |
3 fluid challenges, n | 6 |
4 fluid challenges, n | 3 |