Table 1.
Morphometric and Demographic Characteristics, and Study Details.
| Bypass at 17°C | Bypass at 32°C | Fever | Endovascular Heat Exchanger | |
|---|---|---|---|---|
| Age (yr) | 59 ± 11 | 62 ± 12 | 28 ± 3 | 22 ± 3 |
| Weight (kg) | 84 ± 17 | 78 ± 10 | 78 ± 9 | 67 ± 9 |
| Sex (M / F) | 5/3 | 16/4 | 7/0 | 6/3 |
| Height (cm) | 172 ± 7 | 171 ± 7 | 174 ± 5 | 175 ± 8 |
| Subjects | Cardiac Patients | Cardiac Patients | Healthy Volunteers | Healthy Volunteers |
| Core Temperature Measurement Site (°C) | Nasopharynx | Nasopharynx | Tympanic Membrane | Distal Esophagus |
| Maximum Core Temperature (°C) | 36.5 ± 0.3 | 36.8 ± 0.4 | 37.6 ± 0.9 | 37.6 ± 0.9 |
| Minimum Core Temperature (°C) | 16.8 ± 1.1 | 31.7 ± 0.5 | 36.5 ± 0.3 | 36.5 ± 0.3 |
| Paired Measurements (number) | 95 | 288 | 292 | 238 |
We evaluated estimated and measured mean-body temperature in subjects who participated in four studies. Two studies evaluated core and peripheral temperatures in patients undergoing cardiac surgery during extracorporeal circulation9,10; one evaluated heat balance during anesthesia and induced fever 11; and the fourth tested the efficacy of an endovascular heat-exchanging catheter in healthy human volunteers.12