通过激光光纤辅助线路的气流可防止内镜激光手术期间气道内起火。
Airflow through the auxiliary line of the laser fiber prevents ignition of intra-airway fire during endoscopic laser surgery.
作者信息
Takanashi Shingo, Hasegawa Yukihiro, Ito Akihiko, Sato Masami, Kaji Kunihide, Okumura Ken
机构信息
The Second Department of Internal Medicine, School of Medicine, Hirosaki University, Hirosaki 036-8562, Japan.
出版信息
Lasers Surg Med. 2002;31(3):211-5. doi: 10.1002/lsm.10097.
BACKGROUND AND OBJECTIVES
Ignition accidents during bronchoscopic laser irradiation have occasionally been reported, but the mechanisms responsible for the ignition accidents are not fully understood. We examined causative factors including ignition site, oxygen concentration, and role of airflow through the laser fiber.
STUDY DESIGN/MATERIALS AND METHODS: Porcine muscle tissue was placed in a bottle and irradiated by laser under various conditions. Also, a piece of porcine muscle was wedged in a main bronchus of the isolated porcine lungs and irradiated by laser in the same way.
RESULTS
Flashing occurred on the tissue exposed to the laser, and this flashing reached the ignition when the oxygen concentration was above 30%. Increasing airflow through the laser fiber prevented the ignition even at an oxygen concentration at 100%.
CONCLUSIONS
In laser irradiation, the tissue exposed to the laser can be the ignition site of fire. Increasing airflow through the laser fiber was an effective technique to prevent airway fire.
背景与目的
支气管镜激光照射期间的着火事故偶尔有报道，但着火事故的发生机制尚未完全明确。我们研究了包括着火部位、氧气浓度以及激光光纤内气流作用等诱发因素。
研究设计/材料与方法：将猪肌肉组织置于瓶中，在不同条件下进行激光照射。此外，将一块猪肌肉楔入离体猪肺的主支气管中，以同样方式进行激光照射。
结果
暴露于激光的组织上出现了闪光，当氧气浓度高于30%时，这种闪光达到着火状态。即使在氧气浓度为100%时，增加通过激光光纤的气流也可防止着火。
结论
在激光照射中，暴露于激光的组织可能成为着火点。增加通过激光光纤的气流是预防气道着火的有效技术。
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