Variables | Participants n=70 |
Demographics | |
Age, years | 65 (33; 85) |
Sex, female | 41 (59%) |
BMI, kg/m2 | 28.8 (24.4; 32.9) |
ASA | |
I | 1 (1%) |
II | 37 (53%) |
III | 31 (44%) |
IV | 1 (1%) |
Smoking | |
Never | 37 (53%) |
Current | 3 (4%) |
Former | 30 (43%) |
Medical history | |
Stroke | 5 (7%) |
TCI | 3 (4%) |
Hypertension | 36 (51%) |
Diabetes mellitus | 8 (11%) |
Chronic lung disease* | 15 (21%) |
Sleep apnoea | 16 (23%) |
Arrhythmia | 11 (16%) |
Valvular disease | 6 (9%) |
Coronary artery disease | 8 (11%) |
Creatinine elevation | 2 (3%) |
RCRI class | |
I | 49 (70%) |
II | 15 (21%) |
III | 6 (9%) |
IV | 0 |
Surgical information | |
Length of surgery, minutes | 264 (201; 405) |
Osteotomy performed | 35 (50%) |
Estimated blood loss, mL | 753 (400; 1400) |
Mean arterial pressure, mmHg | 83±9 |
Heart rate, bpm | 69±11 |
Tissue oximetry | |
SmO2 median, % | 75 (70; 79) |
SmO2 minimum, % | 66 (61; 70) |
SmO2 maximum, % | 84 (78; 88) |
TW AUC for SmO2, %×min/hour | 98 (9; 298) |
ScO2 median, % | 66 (62; 71) |
ScO2 minimum, % | 60 (56; 65) |
ScO2 maximum, % | 77 (72;82) |
TW AUC for ScO2, %*min*h-1 | 33 (0.06;131) |
Data are mean±SD for normally distributed variables and median (IQR) for variables with skewed distributions.
*Includes asthma and chronic obstructive pulmonary disease.
ASA, American society of Anesthesiologists; BMI, body mass index; RCRI, Revised Cardiac Risk Index; ScO2, cerebral tissue oxygenation; SmO2, skeletal muscle tissue oxygenation; TCI, transient cerebral ischaemia; TW AUC, time-weighted area under the curve.