[Effects of general anesthesia on deep body temperature: with special reference to operation hours].

Abstract

Deep body temperature in central part (thorax) and peripheries (dorsum of foot and hand) were determined, in order to observe the changes in body temperature occurring due to long or short duration of surgical operation in dental or oral surgery. The results obtained are as follows. Subjects selected were 49 cases including 32 males and 17 females, aged 17-43 years, of less surgical risk and without any disorders in respiratory and circulatory systems. They were classified into five groups on the basis of operation time: 10 cases for two hours or less group, 10 for two to three hours or less, 11 for three to four hours or less, 9 for four to five hours or less and 9 for five hours or more. The measured value in each measured site obtained when anesthesia started and at 30, 60, 120, 180, 240, 300 and 360 min. after when anesthesia started. The difference between central (thorax) deep body temperature and peripheral (dorsums pedis and manus) one was determined as delta T. 1. Changes of deep body temperature in each measured site Central (thorax) deep body temperature decreased temporarily at 30 and 60 min. and increased after 180 min. Peripheral (dorsums of foot and hand) deep body temperature increased till 60 min. and decreased after 120 min. 2. Changes in difference between central (thorax) and peripheral (dorsums of pedis and manus) deep body temperature (delta T). Both differences in deep body temperature, i.e., thorax VS dorsum pedis (delta T1) and thorax VS dorsum of manus (delta T2) became smaller with time from when anesthesia started to 120 minute.(ABSTRACT TRUNCATED AT 250 WORDS)