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Korean J Anesthesiol > Volume 37(5); 1999 > Article
Korean Journal of Anesthesiology 1999;37(5):745-749.
DOI: https://doi.org/10.4097/kjae.1999.37.5.745   
Effects of Different Concentrations of Isoflurane on Core and Peripheral Temperature during General Anesthesia.
Won Ho Lee, Hyun Jeong Kim, Kwang Won Yum
Department of Anesthesiology, Seoul National University College of Dentistry, Seoul, Korea.
Abstract
BACKGROUND
Precise temperature monitoring is essential during general anesthesia. Isoflurane induces vasodilation, which is correlated with changes in body temperature. The purpose of this study is to estimate the relationship between core temperature and peripheral body temperature which is usually used during anesthesia to determine changes in isoflurane concentration.
METHODS
Temperature measurements were performed in 46 patients of ASA physical status 1 or 2 undergoing oral & maxillofacial surgeries. During general anesthesia using isoflurane, body temperatures were measured every hour at the distal esophagus, the skin above the axillary artery and the rectum.
RESULTS
There was a weak linear relation between the changes of delta Teso-axilla and isoflurane concentration, whereas there was no significant relation between the changes of deltaTeso-rectal and the isoflurane concentration.
CONCLUSIONS
Axillary temperature was influenced by changes in isoflurane concentration, whereas the rectal temperature represented the core esophageal temperature during general anesthesia irrespective of changes in isoflurane concentration.
Key Words: Anesthetics, volatile, soflurane; Temperature, axilla, esophageal, rectal
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