Novel Zero-Heat-Flux Deep Body Temperature Measurement in Lower Extremity Vascular and Cardiac Surgery

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• 作者：Marja-Tellervo Mä ; kinen ; MD ; PhD^* ; ^{makinentelle@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Anne Pesonen ; MD ; PhD^* ; Irma Jousela ; MD ; PhD^* ; Janne Pä ; ivä ; rinta ; RN^* ; Satu Poikajä ; rvi ; RN ; MNSc^* ; Anders Albä ; ck ; MD ; PhD^&dagger ; ; Ulla-Stina Salminen ; MD ; PhD^&Dagger ; ; Eero Pesonen ; MD^*
• 关键词：body temperature ; noninvasive ; monitoring ; thermometer ; zero-heat-flux ; core temperature
• 刊名：Journal of Cardiothoracic and Vascular Anesthesia
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：30
• 期：4
• 页码：973-978
• 全文大小：675 K

文摘

The aim of this study was to compare deep body temperature obtained using a novel noninvasive continuous zero-heat-flux temperature measurement system with core temperatures obtained using conventional methods.

Design

A prospective, observational study.

Setting

Operating room of a university hospital.

Participants

The study comprised 15 patients undergoing vascular surgery of the lower extremities and 15 patients undergoing cardiac surgery with cardiopulmonary bypass.

Interventions

Zero-heat-flux thermometry on the forehead and standard core temperature measurements.

Measurements and Main Results

Body temperature was measured using a new thermometry system (SpotOn; 3M, St. Paul, MN) on the forehead and with conventional methods in the esophagus during vascular surgery (n = 15), and in the nasopharynx and pulmonary artery during cardiac surgery (n = 15). The agreement between SpotOn and the conventional methods was assessed using the Bland-Altman random-effects approach for repeated measures. The mean difference between SpotOn and the esophageal temperature during vascular surgery was+0.08°C (95% limit of agreement –0.25 to+0.40°C). During cardiac surgery, during off CPB, the mean difference between SpotOn and the pulmonary arterial temperature was –0.05°C (95% limits of agreement –0.56 to+0.47°C). Throughout cardiac surgery (on and off CPB), the mean difference between SpotOn and the nasopharyngeal temperature was –0.12°C (95% limits of agreement –0.94 to+0.71°C). Poor agreement between the SpotOn and nasopharyngeal temperatures was detected in hypothermia below approximately 32°C.

Conclusions

According to this preliminary study, the deep body temperature measured using the zero-heat-flux system was in good agreement with standard core temperatures during lower extremity vascular and cardiac surgery. However, agreement was questionable during hypothermia below 32°C.