Evaluation of Temple Touch Pro^TM under Hypothermic Cardiopulmonary Bypass

Abstract

The purpose of this study was to compare the temperature estimated by TTP (TTTP) and nasopharyngeal temperature (TNASO) under hypothermic cardiopulmonary bypass. We examined the correlation and agreement between TNASO and TTTP. We identified 9 adult patients in whom TTTP and TNASO had been measured simultaneously during anesthesia for elective cardiovascular surgery. We compared TNASO with TTTP before CPB, during CPB with cooling TNASO, during CPB with stable low TNASO, during CPB with re-warming TNASO, and after CPB. Correlations between absolute values of TNASO and TTTP were determined by linear regression. Bland-Altman analysis was used to examine the agreement between TNASO and TTTP. TTTP was highly correlated with TNASO in all 5 periods (p＜0.01) .Bland-Altman plots showed the 95％ LOA was not within ±0.5℃ in all 5 periods. Good agreement between the two methods of measurement was not seen. TTTP and TNASO have a good correlation but have poor agreement under hypothermic cardiopulmonary bypass.