Comparison of distal oesophageal temperature with 'deep' and tracheal temperatures
| Autor: | Kazuyuki Hanagata, Teruo Kumazawa, Makoto Ozaki, Hironobu Iwashita, Takashi Matsukawa, Daniel I. Sessler |
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| Rok vydání: | 1997 |
| Předmět: |
Sternum
Thermometers medicine.medical_treatment Anesthesia General Body Temperature Esophagus Monitoring Intraoperative Intubation Intratracheal Humans Medicine Intubation Thiamylal Forehead integumentary system Genitalia.female business.industry Stethoscopes Skin temperature Equipment Design Genitalia Female General Medicine Anatomy Middle Aged respiratory system musculoskeletal system Respiration Artificial Trachea body regions surgical procedures operative Anesthesiology and Pain Medicine Anesthesia Anesthesia Intravenous Regression Analysis Female Skin Temperature business Anesthetics Intravenous |
| Zdroj: | Canadian Journal of Anaesthesia. 44:433-438 |
| ISSN: | 1496-8975 0832-610X |
| DOI: | 10.1007/bf03014466 |
| Popis: | To compare distal oesophageal (reference) temperature with "deep-sternal," "deep-forehead," and tracheal temperatures, establishing the accuracy and precision of each.We studied 20 patients undergoing general anaesthesia for gynaecological surgery. Their lungs were mechanically ventilated with a circle system, at a fresh-gas flow rate of 6 L.min-1 Respiratory gases were not warmed or humidified. Tracheal temperatures were recorded from a Trachelon tube inserted approximately 21 cm. Deep-body temperatures were measured at the sternum and forehead using a Coretemp thermometer. The principle of the method is to null thermal flux through a cutaneous disk, thus obliterating thermal gradients between the sides of the disk, skin surface, and subcutaneous tissues. Distal oesophageal temperatures were measured from thermocouples incorporated into oesophageal stethoscopes. Tracheal and deep-tissue temperatures were compared with oesophageal temperature using regression and Bland and Altman analyses.Tracheal, sternal, and forehead temperatures correlated similarly with distal oesophageal temperature, correlation coefficients (r2) being 0.7 in each case. The offset (oesophageal temperature minus study site) was considerably larger for tracheal temperature (0.7 degree C) than for the other sites (0.2 degree C). However, the precision was only 0.3 degree C at each site.Our data suggest that tracheal temperatures may not be an adequate substitute for conventional core-temperature monitoring sites. In contrast, the accuracy and precision of deep-tissue temperature monitoring at the sternum and forehead was sufficient for clinical use. |
| Databáze: | OpenAIRE |
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