Abstract
PurposeTemperature monitoring in the perioperative periods is important in order to avoid both hyperthermia and hypothermia. In our pilot study, we evaluated the usefulness of Bair Hugger™ temperature monitoring system (BHTMS), a forehead deep temperature monitoring system, in the neck and chest under general anesthesia.MethodsAfter approval from the Sapporo Medical University Research Ethics Board, 30 female patients scheduled for laparoscopic surgery were enrolled in this study. Patients were divided into three groups, depending on the attachment regions of BHTMS sensor. Temperatures obtained from the three regions and each esophageal temperature (TEso) were monitored and analyzed.ResultsA Bland-Altman plot showed that the mean bias between temperature obtained from the neck and TEso was + 0.05 °C above TEso (2SD ± 0.35 °C), and that between temperature obtained from the chest and TEso was − 0.55 °C above TEso (2SD ± 0.55 °C).ConclusionBy using the BHTMS sensor in the neck region, it is possible to monitor core body temperature seamlessly and with high reliability. These results may suggest that the use of BHTMS has high versatility in measuring perioperative core body temperature.Trial registrationThis study was approved by the Sapporo Medical University Research Ethics Board (2015: No. 262-149) and registered with UMIN Clinical Trial Registry (UMIN000016802 Registered 15 March 2015).
Highlights
Temperature monitoring in the perioperative periods is important in order to avoid both hyperthermia and hypothermia
The aim of this study is to evaluate the performance of Bair HuggerTM temperature monitoring system (BHTMS) in the neck and chest in Japanese patients who were scheduled non-cardiac surgery
There were no significant differences in age, height, weight, body mass index (BMI), length of operation, length of anesthesia, blood loss, and estimated water balance in each group (Table 1)
Summary
Temperature monitoring in the perioperative periods is important in order to avoid both hyperthermia and hypothermia. Temperatures obtained from these body regions sometimes poorly reflect the real values and drastic changes in core body temperature [10,11,12]. As another way of monitoring core temperature, we may select zero-heat-flux thermometer which can measure deep temperature approximately 1–2 cm below the skin surface [13]. In Japan, we can use the Bair HuggerTM temperature monitoring system (BHTMS; 3M, St. Paul, MN, USA), which involves attachment of a thermal sensor on the forehead throughout the perioperative period. In craniotomy and neck or face surgeries, we cannot attach the forehead sensor on patients’ frontal head region. The forehead sensor is difficult to apply when the frontal head region is covered by the other probes such as depth of anesthesia or tissue oxygen saturation monitors
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