Japanese journal of medical electronics and biological engineering
Online ISSN : 2185-5498
Print ISSN : 0021-3292
ISSN-L : 0021-3292
Postoperative Human Body Temperature Rhythm
Jun NARUMIKozo SUMAHidemi KANEKO
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1985 Volume 23 Issue 1 Pages 42-45

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Abstract
Postoperative deep body temperature rhythms in fifteen patients undergoing aorto-coronary bypass surgery (group I), and in seven patients undergoing non-cardiac major surgery (group II) have been studied. Analysis was made by Halberg's least squares method. Temperature rhythms of both groups were found to be greatly deviated from those under normal conditions. In group I, 2 patients showed ultradian rhythm, 3 patients, circadian rhythm, and 8 patients, infradian rhythm. In 2 patients, the rhythm could not be classified. In group II, 4 patients showed ultradian rhythm, 2 patients, circadian and 1 patient, infradian rhythm. The period of the rhythm cycle of group I (33.0±15.4 hours) was longer (P<0.05) than that of group II (19.5±8.0 hours). The variance of the mesor of group I (8.4°C) was larger (P<0.01) than that of group II (0.5°C). The variance of the amplitude of body temperature in group I (18.5°C) was also larger (P<0.05) than that of group II (2.6°C). As for acrophase, no significant difference was found between the two groups (14°30'±5°45' in group I, 9°54'±4°48' in group II). It took 6.0±1.3 days after surgery for temperature rhythm to return to 24-hour cycle in group I. On the other hand it took 3.8±1.6 days in group II, indicating speedier recovery of the 24-hour rhythm than group I (P<0.01). It was concluded that the cardiac surgery group showed greater temperature rhythm disturbance compared with the non-cardiac surgery group.
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© Japanese Society for Medical and Biological Engineering
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