Makino A, Morimoto Y, Matsumoto S, Oka H, Shimizu K, Miyauchi Y
Department of Anesthesiology and Critical Care, Tokuyama Central Hospital.
Masui. 1998 May;47(5):615-7.
A patient with bronchial asthma was scheduled for an operation under nitrous oxide-isoflurane anesthesia. We monitored isoflurane concentrations continuously using an anesthetic gas analyzer (BK 1304). Upon puffing procaterol hydrochloride aerosol for 4 times, the analyzer showed a rapid increase in end-tidal isoflurane concentration. The BK 1304 uses infrared photoacoustic spectrophotometry and it is susceptible to interferences caused by Freon propellants in bronchodilator aerosols. We should take care in monitoring inhalational anesthetics when using aerosols containing Freon propellants.
一名支气管哮喘患者计划在氧化亚氮-异氟烷麻醉下进行手术。我们使用麻醉气体分析仪（BK 1304）持续监测异氟烷浓度。在喷入4次盐酸丙卡特罗气雾剂后，分析仪显示呼气末异氟烷浓度迅速升高。BK 1304采用红外光声分光光度法，易受支气管扩张剂气雾剂中氟利昂推进剂引起的干扰。使用含有氟利昂推进剂的气雾剂时，我们在监测吸入麻醉剂时应小心。
