Biomaterial Database

Core temperature measured in the auricular canal: comparison between four different tympanic thermometers. 1992

J Jakobsson, and A Nilsson, and L Carlsson

Department of Anaesthesia and Intensive Care, Karolinska Institute, Danderyd Hospital, Stockholm, Sweden.

Four different tympanic thermometers, absorbing infra-red radiation, (FirstTemp, Diatek, Ivac and Genius) were studied. Variations from repeated measurements and reliability of tympanic temperature compared to oesophageal, rectal and pulmonary artery temperature were studied. Core temperature measured by the "FirstTemp" and the "Genius" thermometers showed slightly higher values than core temperature measured by oesophageal, rectal and pulmonary artery thermistors. Compared to oesophageal temperature "FirstTemp" showed 0.56 degrees C and "Genius" 0.28 degrees C higher values, while the "Diatek" and the "Ivac" gave slightly lower values (-0.5 degrees C and -0.28 degrees C). All four thermometers were found accurate for repeated measurement both in terms of standard deviation and coefficient of variance. All four tympanic thermometers showed good accuracy for changes in core temperatures compared to the reference thermistors (r2 values 0.96 for "FirstTemp", 0.88 for "Diatek", 0.96 for "IVAC" and 0.95 for "Genius"). The tympanic thermometer was found to be a valuable alternative for measuring core temperature in most clinical settings.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D011651	Pulmonary Artery	The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.	Arteries, Pulmonary,Artery, Pulmonary,Pulmonary Arteries
D012007	Rectum	The distal segment of the LARGE INTESTINE, between the SIGMOID COLON and the ANAL CANAL.	Rectums
D001831	Body Temperature	The measure of the level of heat of a human or animal.	Organ Temperature,Body Temperatures,Organ Temperatures,Temperature, Body,Temperature, Organ,Temperatures, Body,Temperatures, Organ
D003080	Cold Temperature	An absence of warmth or heat or a temperature notably below an accustomed norm.	Cold,Cold Temperatures,Temperature, Cold,Temperatures, Cold
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D004947	Esophagus	The muscular membranous segment between the PHARYNX and the STOMACH in the UPPER GASTROINTESTINAL TRACT.
D005082	Physical Exertion	Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.	Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man