新型抗激光气管导管的燃烧特性

Incendiary characteristics of a new laser-resistant endotracheal tube.

作者信息

Hayes D M, Gaba D M, Goode R L

出版信息

Otolaryngol Head Neck Surg. 1986 Jul;95(1):37-40. doi: 10.1177/019459988609500109.

DOI:10.1177/019459988609500109

Abstract

Endotracheal tube fires are the most frequent complication of laser surgery of the larynx. We investigated the incendiary characteristics of a new laser-resistant endotracheal tube, compared to polyvinyl chloride (PVC) and red rubber (RR) tubes, with different gas mixtures. A CO2 laser was focused on each tube and the probability of fire was assessed with oxygen fractions (FiO2) of 30%, 40%, 50%, 70%, and 100%, the balance being N2 or N2O. The laser-resistant tube could not be penetrated by a single laser pulse, regardless of laser energy or gas composition. PVC and RR tubes were readily ignited, the probability of ignition being related to oxygen concentration and laser energy. Nitrous oxide readily supported combustion. We suggest that laser surgery of the larynx can be most safely performed with a laser-resistant endotracheal tube and with gas mixtures containing the minimal safe O2 concentration (without nitrous oxide).

摘要

气管内导管起火是喉部激光手术最常见的并发症。我们研究了一种新型抗激光气管内导管与聚氯乙烯（PVC）管和红橡胶（RR）管相比，在不同气体混合物中的燃烧特性。将二氧化碳激光聚焦在每根导管上，并在氧分数（FiO2）分别为30%、40%、50%、70%和100%（其余为氮气或氧化亚氮）的情况下评估起火概率。无论激光能量或气体成分如何，单个激光脉冲都无法穿透抗激光导管。PVC管和RR管很容易被点燃，着火概率与氧气浓度和激光能量有关。氧化亚氮很容易助燃。我们建议，使用抗激光气管内导管并使用含最低安全氧气浓度（不含氧化亚氮）的气体混合物，可最安全地进行喉部激光手术。