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Updated: May 10, 2026

Esophageal Heat Transfer for Patient Temperature Control and Targeted Temperature Management
Published on: November 21, 2017
Hypothermia and hyperthermia in the ambulatory surgical patient
Michael Hernandez1, Thomas W Cutter, Jeffrey L Apfelbaum
1Department of Anesthesia and Critical Care, The University of Chicago Medicine, 5841 S. Maryland Avenue, Chicago, IL 60637, USA.
Abstract:
Homeotherms, including humans, are able to maintain a relatively constant temperature despite variations in their thermal environment. We normally maintain a narrow thermoregulatory threshold range of approximately 0.2°C, and little change in core temperature is required to trigger compensatory mechanisms to either cool or warm our core temperature back to normothermia. This article focuses on the mechanisms and consequences of hypothermia and hyperthermia in the surgical patient and reviews techniques to prevent and treat these conditions.
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Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...

