Gastrointestinal thermal homogeneity and effect of cold water ingestion

• Published in: Journal of thermal biology 2018-12, Vol.78 (5), p.204-208
• Main Authors: Roxane, Beaufils, Ouma Chandrou, Koumar, Pierre Alexandre, Chapon, Christophe, Chesneau, Bruno, Sesboüé, Stéphane, Besnard, Hervé, Normand, Sébastien, Moussay, Nicolas, Bessot
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Body Temperature; Cold Temperature; Core temperature; Digestive system; Drinking; Drinking Water; Female; Fluid ingestion; Food intake; Gastrointestinal tract; Gastrointestinal Tract - physiology; Humans; Ingestible sensors; Intestine; Life Sciences; Male; Middle Aged; Rectum; Telemetric pill; Temperature effects; Water
• ISSN: 0306-4565; 1879-0992
• DOI: 10.1016/j.jtherbio.2018.10.002

Gastrointestinal temperature (GIT) is a common alternative for body core temperature (CT) monitoring via an ingestible pill connected to an external monitor. However, its reliability could depend on thermal homogeneity, regardless of the gastrointestinal tract location. The purpose of this study was to evaluate GIT variation during the transit of telemetric pills and the impact of cold drink ingestion compared to the time point of pill intake. Twenty-three healthy participants ingested six e-Celsius electronic pills, one every five hours, and they ingested 150 milliliters of cold water (5 +/− 1 °C) 1, 2, 3, 4, 8, and 12 h following the first pill ingestion. The recorded temperature remained similar between pills consecutively ingested by each subject, regardless of the internal location within the gastrointestinal tract, supporting the homogeneity of GIT. GIT monitoring was significantly affected by ingestion of a cold drink two hours (−0.8 ± 0.2 °C; p = 0.001) and three hours following pill ingestion (−0.9 ± 0.2 °C; p