Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Prospective Comparative Analysis of Zero-Heat-Flux Thermometer (SpotOn®) Compared with Tympanic Thermometer and Bladder Thermometer in Extremely Aged Patients Undergoing Lower Extremity Orthopedic Surgery

Version 1 : Received: 19 May 2023 / Approved: 23 May 2023 / Online: 23 May 2023 (05:32:17 CEST)

A peer-reviewed article of this Preprint also exists.

Park, C.; Kim, T.; Oh, S.; Bang, Y.-S. Prospective Comparative Analysis of Zero-Heat-Flux Thermometer (SpotOn®) Compared with Tympanic Thermometer and Bladder Thermometer in Extremely Aged Patients Undergoing Lower Extremity Orthopedic Surgery. Medicine 2023, 102, e35593, doi:10.1097/md.0000000000035593. Park, C.; Kim, T.; Oh, S.; Bang, Y.-S. Prospective Comparative Analysis of Zero-Heat-Flux Thermometer (SpotOn®) Compared with Tympanic Thermometer and Bladder Thermometer in Extremely Aged Patients Undergoing Lower Extremity Orthopedic Surgery. Medicine 2023, 102, e35593, doi:10.1097/md.0000000000035593.

Abstract

Thermoregulation is important for maintaining homeostasis of our body. It can be easily broken under anesthesia. An appropriate method to measure the core body temperature is needed, especially for elderly patients because the efficiency of thermoregulation gradually decreases with age. The aim of this study was to examine the accuracy and feasibility of using of SpotOn® sensor in lower extremity orthopedic surgery in elderly patients aged over 80 years by comparing a SpotOn® sensor with two other reliable minimal-invasive methods: a tympanic membrane thermometer and a bladder thermometer. This study enrolled 45 patients aged over 80 years who were scheduled to undergo a lower extremity surgery. Body temperature was measured using a SpotOn® sensor, tympanic membrane thermometer and bladder thermometer. Agreements between the SpotOn® sensor and the other two methods were assessed using Bland and Altman plots for repeated measures adjusted for unequal numbers of measurements per patient. Compared with TempBladder, bias and limits of agreement for TempZHF were 0.07℃ ± 0.58℃. Compared with TempTympanic, bias and limits of agreement for TempZHF were -0.28℃ ± 0.61℃. 3M SpotOn® sensor using ZHF method for patients aged over 80 years undergoing lower extremity surgery shows feasible measurement value and sensitivity.

Keywords

Body temperature; Elderly patient; Orthopedic surgery; Zero-Heat-Flux thermometer

Subject

Medicine and Pharmacology, Anesthesiology and Pain Medicine

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