Comparison of Wireless Continuous Axillary and Core Temperature Measurement after Major Surgery

Anders Blom Nathansen*, Jesper Mølgaard, Christian Sylvest Meyhoff, Eske Kvanner Aasvang

*Corresponding author af dette arbejde

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Abstract

Background: Temperature is considered one of the primary vital signs for detection of complications such as infections. Continuous wireless real-time axillary temperature monitoring is technologically feasible at the general ward, but no clinical validation studies exist. Methods: This study compared axillary temperature with a urinary bladder thermometer in 40 major abdominal postoperative patients. The primary outcome was changes in axillary temperature registrations. Secondary outcomes were mean bias between the urinary bladder and the axillary temperatures. Intermittent frontal and tympanic temperature recordings were also collected. Results: Forty patients were monitored for 50 min with an average core temperature of 36.8 °C. The mean bias was −1.0 °C (LoA −1.9 to −0) after 5 min, and −0.8 °C (LoA −1.6 to −0.1) after 10 min when comparing the axillary temperature with the urinary bladder temperature. After 20 min, the mean bias was −0.6 °C (LoA −1.3–0.1). During upper arm abduction, the axilla temperature was reduced to −1.6 °C (LoA −2.9 to −0.3) within 1 min. Temporal skin temperature measurement had a resulted in a mean bias of −0.1 °C (LOA −1.1 to −1.0) compared with central temperature. Compared with the mean tympanic temperature, it was −0.1 °C (LoA −0.9 to −1.0) lower than the urinay bladder temperature. Conclusions: Axillary temperature increased with time, reaching a mean bias of 1 °C between axillary and core temperature within 5 min. Opening the axillary resulted in rapidly lower temperature recordings. These findings may aid in use and designing corrections for continuous axillary temperature monitoring.

OriginalsprogEngelsk
Artikelnummer4469
TidsskriftSensors
Vol/bind24
Udgave nummer14
Antal sider11
ISSN1424-3210
DOI
StatusUdgivet - 2024

Bibliografisk note

Funding Information:
The WARD-project has received grants from the Innovation Fund Denmark, the Novo Nordic Foundation, the Danish Cancer Society, Steno Diabetes Center Denmark, as well as internal institutional funding. Christian S. Meyhoff and Eske K. Aasvang have founded a start-up company, WARD247 ApS, to pursue the WARD-projects regulatory and commercial activities. WARD247 ApS has finalized terms for license agreement for any WARD-project software and patents, of which one has been filed. None of the entities above influences the study design, conduct, analysis or reporting.

Publisher Copyright:
© 2024 by the authors.

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