Mucosal fluid evaporation is not the method of heat dissipation from fourth-degree laryngopharyngeal burns.

This study was designed to explore whether mucosal fluid evaporation represents a method of heat dissipation from thermal air inhalation injury and to assess laryngopharyngeal tissue damage according to heat quantity changes of dry air and vapour. Fifteen adult male beagles were divided into five groups to inhale heated air or vapour for 10 min as follows: control group (ordinary air), group I (91-110 °C heated air), group II (148-175 °C heated air), group III (209-227 °C heated air), and group IV (96 °C saturated vapour). The heat quantity changes of the dry air and vapour were calculated via thermodynamic formulas.

Laryngeal morphologic changes and epidemiology in patients with inhalation injury: a retrospective study.

Background And Objectives: Laryngeal morphologic changes are important in risk assessment of upper airway obstruction (UAO) after inhalation injury. This retrospective study evaluates the clinical application of laryngeal burn classification system.

Materials And Methods: Clinical data from January 1999 to June 2013 were analyzed retrospectively.

Circulational heat dissipation of upper airway: Canine model of inhalational thermal injury.

Background: The upper airway has powerful heat-absorbing ability, in which the blood circulation may play an important role.

Objective: This study aimed to explore the circulational heat-dissipating ability, and to investigate the contribution of blood circulation to the heat-absorbing ability of upper airway.

Methods: 18 adult, male Beagle dogs were divided into three groups to inhale thermal dry air of 70-80°C, 150-160°C or 310-320°C for 20min.

[Analysis of 59 cases of frostbite in plain region].

Objective: To retrospectively survey frostbite in patients living in plain regions, and to analyze the features of frostbite and the results after hospitalization.

Methods: Fifty-nine patients with frostbite, aged from 15 to 85 years admitted in Beijing Jishuitan Hospital from 1992 to 2007, were enrolled in this study. Occupation, cause of the injury, initial visit time, position and degree of depth (assessed according to the standard of burn injury) of frostbite, and amputation rate of patients were recorded and analyzed.