The Usefulness of an Earphone-Type Infrared Tympanic Thermometer for Intraoperative Core Temperature Monitoring

Kiya, Tomohiro; Yamakage, Michiaki; Hayase, Tomo; Satoh, Jun‐ichi; Namiki, Akiyoshi

doi:10.1213/01.ane.0000289639.87836.79

Cited by 22 publications

(21 citation statements)

References 21 publications

(12 reference statements)

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“…Core temperature was measured by an earphone-type infrared tympanic membrane thermometer (CE Thermo; Nipro, Tokyo, Japan; resolution 0.01˚C, accuracy ±0.1˚C) [6]. The ear canal was clean in all subjects, with no visible hair or cerumen.…”

Section: Measurementsmentioning

confidence: 99%

High Preoperative Anxiety Level and the Risk of Intraoperative Hypothermia

Tanaka

Ohno²,

Hori³

et al. 2012

IJCM

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Aim: The relationship between preoperative anxiety level and intraoperative hypothermia (<36℃) was investigated. Background: Core temperature often decreases during surgery, with an initial rapid decrease followed by a slower decrease for about 2 hours. Preoperative anxiety may influence perioperative physiological responses. The relationship between preoperative anxiety level and perioperative decrease in core temperature has not been studied closely. Design: A prospective observational study. Methods: This study enrolled 120 adult patients who underwent elective major abdominal surgery under combined epidural and general anesthesia. Tympanic membrane temperature was used to measure core temperature preoperatively and during the operation. The relationship between anxiety level according to the State-Trait Anxiety Inventory (STAI) and core temperature was examined using descriptive and multivariate risk analysis. Results: High anxiety level was found in 61 patients (51%), of which 26 (43%) developed hypothermia during the first hour and 40 (66%) developed hypothermia during the first 2 hours of anesthesia. After adjustment for covariates, patients with a high anxiety level were found to have a 2.17-fold higher risk of hypothermia during the first hour and a 1.77-fold higher risk of hypothermia during the first 2 hours than patients with a low/moderate anxiety level. Conclusions: The risk of hypothermia in the early phase of general anesthesia can be predicted by measurement of the preoperative anxiety level using the STAI. Relevance to Clinical Practice: Patients with a high anxiety level had a significantly higher risk of intraoperative hypothermia. Preoperative preventive nursing care programs should include anxiety management and thermal care

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Section: Measurementsmentioning

confidence: 99%

High Preoperative Anxiety Level and the Risk of Intraoperative Hypothermia

Tanaka

Ohno²,

Hori³

et al. 2012

IJCM

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“…We previously reported the accuracy and usefulness of an infrared tympanic thermometer (IRT) [4]. Recently, Kiya et al [5] demonstrated that tympanic membrane temperature (T Tym ) using a novel earphone-type IRT is suitable for continuous core temperature monitoring during CPB because of its clinically acceptable limits, compared to esophageal temperature, and its noninvasive and hygienic manner. In this study, we evaluated the properties of this earphone-type IRT for core temperature monitoring during CPB in cardiac surgery compared to rectal (T Rec ) and nasopharyngeal temperature (T Naso ).…”

mentioning

confidence: 99%

“…78°C) In this study, we showed that temperature measurements using the earphone-type IRT are reliable for core temperature monitoring during CPB in cardiac surgery, and T Tym and T Naso had a higher correlation than T Tym and T Rec . It is widely known that measurement of T Tym is a useful method for core temperature monitoring during noncardiac surgery [4,5], CPB [5], intensive care [7], and therapeutic hypothermia [7]. Because of the direct blood supply from the carotid artery to the tympanic membrane, T Tym has a high correlation to core temperature and can accurately follow body temperature [8].…”

mentioning

confidence: 99%

The usefulness of an earphone-type infrared tympanic thermometer during cardiac surgery with cardiopulmonary bypass: clinical report

et al. 2011

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We evaluated the usefulness of a novel earphone-type infrared tympanic thermometer (IRT) during cardiac surgery with cardiopulmonary bypass. Tympanic membrane temperature (T(Tym)) was monitored using the IRT inserted into the right ear canal of 12 adult patients (ASA III) who had been scheduled for elective cardiac surgery with cardiopulmonary bypass under general anesthesia. Rectum (T(Rec)) and nasopharyngeal temperatures (T(Naso)) were also monitored, and all temperatures were recorded at 5-min intervals during cardiopulmonary bypass. Operating room temperature was kept at 20°-27°C; a conductive warming/cooling system was used to control the patient's body temperature. Of 265 measurements obtained, body temperature range was 31.6°-37.6°C. No complications were related to site of insertion of the monitoring probe. Significant correlations were seen between T(Tym) and T(Naso) (r = 0.971, P < 0.001), and T(Tym) and T(Rec) (r = 0.759, P < 0.001). A Bland-Altman plot showed that average temperature of T (Tym) was 0.06°C above T(Naso) (±0.66°C, 2 SD) and 0.12°C below T(Rec) (±1.78°C, 2 SD). We conclude that an earphone-type IRT is noninvasive and hygienic and could continuously evaluate selective cerebral temperature during cardiopulmonary bypass in adults.

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“…Often, core body temperature is measured in the pulmonary artery, but it also can be monitored in the distal esophagus, nasopharynx, and tympanic membrane 8 . The oral, axillary, bladder, rectal, and forehead skin temperature monitoring techniques can be used to estimate core temperature 2 .…”

Section: How Is Normothermia Maintained?mentioning

confidence: 99%

“…The oral, axillary, bladder, rectal, and forehead skin temperature monitoring techniques can be used to estimate core temperature 2 . During general anesthesia, core body temperatures are usually monitored in the esophagus, rectum, or bladder; however, these techniques are invasive and are considered unhygienic 8 . Bladder temperature readings are similar to rectal temperature readings; however, decreased urine flow can pose interpretation difficulties.…”

Section: How Is Normothermia Maintained?mentioning

confidence: 99%

Reducing the Risk of Unplanned Perioperative Hypothermia

Lynch

Dixon²,

Leary³

2010

AORN Journal

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Maintaining normothermia is important for patient safety, positive surgical outcomes, and increased patient satisfaction. Causes of unplanned hypothermia in the OR include cold room temperatures, the effects of anesthesia, cold IV and irrigation fluids, skin and wound exposure, and patient risk factors. Nurses at Riddle Memorial Hospital in Media, Pennsylvania, performed a quality improvement project to evaluate the effectiveness of using warm blankets, warm irrigation fluids, or forced-air warming on perioperative patients to maintain their core temperature during the perioperative experience. Results of the project showed that 75% of patients who received forced-air warming perioperatively had temperatures that reached or were maintained at 36° C (96.8° F) or higher within 15 minutes after leaving the OR.

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The Usefulness of an Earphone-Type Infrared Tympanic Thermometer for Intraoperative Core Temperature Monitoring

Abstract: The earphone-type IRT might be used in a clinical setting for reliable and continuous core temperature monitoring during an operation.

Cited by 22 publications

References 21 publications

High Preoperative Anxiety Level and the Risk of Intraoperative Hypothermia

High Preoperative Anxiety Level and the Risk of Intraoperative Hypothermia

The usefulness of an earphone-type infrared tympanic thermometer during cardiac surgery with cardiopulmonary bypass: clinical report

Reducing the Risk of Unplanned Perioperative Hypothermia

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