PubMed · 6551783
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M J Kim. Temperature analysis.. https://doi.org/10.1097/00006199-198305000-00013
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Tympanic temperature measurements in the able bodied have been well studied and validated in previous investigations. This validation has not been studied in individuals with high spinal cord injuries where autonomic control is different above and below the level of the lesion, which makes the accuracy of this measurement for core body temperature questionable. In this correlational study we look at the reliability and validity of tympanic temperature measurement in individuals with high spinal cord injuries in comparison to oral and rectal temperature measures. The rectal measurement proved to be the most reliable with an r value of 0.975 overall. The oral was minimally better than the tympanic with r values of 0.88 and 0.86, respectively. The validity of the oral measure in predicting changes in the rectal temperature (gold standard) was slightly better than the tympanic with r values of 0.88 and 0.77, respectively. Both the oral and tympanic measures accurately reflected changes in the rectal (core) temperature.
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STUDY OBJECTIVE: To determine if temperature during cardiopulmonary bypass (CPB) has an effect on perioperative and postoperative thyroid function. DESIGN: Prospective study comparing thyroid function during and after hypothermic and normothermic CPB. SETTING: Cardiac surgical unit at a university-affiliated hospital. PATIENTS: Twelve patients scheduled to undergo cardiac operations with normothermic (n = 6) or hypothermic (n = 6) CPB. INTERVENTIONS: Blood was analyzed for serum concentration of total thyroxine (TT4), total triiodothyronine (TT3), free T3 (fT3), reverse T3 (rT3), and thyroid stimulating hormone (TSH) preoperatively, 60 min after CPB was initiated, 30 min after discontinuing CPB, and on postoperative days (POD) 1, 3, and 5. MEASUREMENTS AND RESULTS: Patients who underwent either cold (26 degrees +/- 5 degrees C) or warm (35 degrees +/- 1 degree C) CPB were comparable with regard to age, body weight, duration of CPB, cross-clamp time, use of inotropes, total heparin dose, and length of hospital stay. Incidence of postoperative myocardial infarction, congestive heart failure, and death were similar. In both groups, TT4 and TT3 were reduced below baseline values beginning with CPB and persisting for up to 5 days after CPB (p < 0.05), free T3 was reduced for up to 3 days after CPB (p < 0.05), mean serum rT3 was elevated on POD 1 and POD 3 (p < 0.05), and TSH remained unchanged. CONCLUSION: The results of this study suggest that normothermic CPB does not prevent the development of the "euthyroid sick syndrome" during and after CPB. Despite these changes in thyroid function, most patients in both groups had a normal postoperative recovery.