Esophageal temperature probe
Citation, DOI & article data
Esophageal temperature probes are used to monitor core body temperatures in patients receiving anesthesia. The probe is advanced either through the nasal passage or oral cavity, before following a similar path to a nasogastric tube.
Clinically significant changes in core body temperature that may be:
- anticipated 1
- suspected 1
- intended 1
- known esophageal strictures 2
- esophageal cancer 2
- esophageal perforation 2
- end-stage liver diseases and varices 2
A correctly placed esophageal temperature probe should:
- descend the midline, following the esophageal path and avoiding the contours of the bronchi
- clearly bisect the carina or bronchi
- have its tip
- in the lower third of the esophageal tract 3
- at the mid-level of the heart
Malpositioning may include tip position:
- traversing either bronchus or more distally into the lung
- coiling in the upper airway
Given that the linear radiopaque marker on a temperature probe may at times be of similar thickness to a nasogastric tube, care must be taken to ensure the devices are not mistaken for each other.
- 1. Standard 2.4.2 - ASA Standards for Basic Anesthetic Monitoring. Asahq.org, 2020. [Link].
- 2. AACN. AACN Procedure Manual for Critical Care - E-Book. (2013) ISBN: 9781455776900 - Google Books
- 3. Ron Walls, Robert Hockberger, Marianne Gausche-Hill. Rosen's Emergency Medicine - Concepts and Clinical Practice E-Book. (2017-03-09) ISBN: 9780323390163