Temperature distribution in the upper airway after inhalation injury

Abstract Objective The aim of the study was to establish an animal model of laryngeal burn and to investigate the temperature distribution of heated air in the upper airway. Methods The animal model was established by inhalation of dry heated air at 80, 160 and 320 °C in 18 healthy, male, adult hybr...

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Bibliographic Details
Published in:Burns 2011-11, Vol.37 (7), p.1187-1191
Main Authors: Rong, Yan-hua, Liu, Wei, Wang, Cheng, Ning, Fang-gang, Zhang, Guo-an
Format: Article
Language:English
Subjects:
Animal model
Animals
Biological and medical sciences
Body Temperature - physiology
Burns
Critical Care
Disease Models, Animal
Dogs
Hot Temperature - adverse effects
Laryngeal burn
Larynx - injuries
Larynx - physiology
Male
Medical sciences
Smoke Inhalation Injury - physiopathology
Temperature distribution
Trachea - physiology
Traumas. Diseases due to physical agents
Upper airway
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Summary:Abstract Objective The aim of the study was to establish an animal model of laryngeal burn and to investigate the temperature distribution of heated air in the upper airway. Methods The animal model was established by inhalation of dry heated air at 80, 160 and 320 °C in 18 healthy, male, adult hybrid dogs. Time for inducing injury was set at 20 min. The distribution of temperatures after heated-air inhalation was examined at different locations including the epiglottis, laryngeal vestibule, vocal folds and trachea. Results The temperatures of the heated air decreased to 47.1, 118.4 and 193.8 °C at the laryngeal vestibule and to 39.3, 56.6 and 137.9 °C at the lower margin of vocal folds in the 80, 160 and 320 °C groups, respectively. Conclusion Due to its special anatomy and functions, the larynx has different responses to dry heated air at different temperatures. The air temperature decreases markedly when the air arrives at the larynx. By contrast, the larynx has a low capacity for blocking high-temperature air and retaining heat. As a result, high-temperature air often causes more severe injury to the larynx and the lower airway.
ISSN:0305-4179
1879-1409
DOI:10.1016/j.burns.2011.06.004