Table 2.
Descriptive statistics of perioperative temperature and patient warming (N = 227).
| Variable | Value |
|---|---|
| Baseline core temperature prior to anesthesia (°C) | 36.56 ± 0.44 |
|
| |
| Type of thermometry at baseline | |
| Axillary thermometer | 210 (92.5%) |
| Othera | 17 (7.5%) |
| Perioperative lowest temperature (°C) | 35.99 ± 0.52 |
| Intraoperative passive warmingb | 227 (100.0%) |
| Intraoperative active warmingc (N = 217) | 10 (4.6%) |
| Volume of intraoperative intravenous fluid (mL) | 1500 (1100–2200) |
|
| |
| Intravenous fluid warming (N = 219) | |
| Unwarmed | 144 (65.8%) |
| Prewarmed | 18 (8.2%) |
| Continuously warmed | 57 (26.0%) |
| Volume of irrigation fluid (mL, N = 205) | 500 (50–1000) |
|
| |
| Irrigation fluid warming (N = 151) | |
| Unwarmed | 109 (72.2%) |
| Prewarmed | 42 (27.8%) |
| Blood transfusion (mL); median (range) | 0 (0–1200) |
|
| |
| Warming of blood transfusion (N = 13) | |
| Prewarmed | 5 (38.5%) |
| Continuous warming | 8 (61.5%) |
|
| |
| Ambient temperature (°C) | |
| Preoperative holding area (N = 200) | 25.5 ± 2.7 |
| Operating room (N = 217) | 22.2 ± 0.9 |
| Postanesthesia care unit (N = 196) | 24.1 ± 1.9 |
Data are shown as n/N (% of nonmissing data), mean ± SD, or median (IQR), unless otherwise specified. IQR, interquartile range; SD, standard deviation. a Others include an infrared tympanic thermometer and nasopharyngeal probe. b Passive warming includes cotton blankets, surgical drapes, and others. c Intraoperative active warming includes forced-air warming, electric blankets, and others.