Johnstone R D, Willis B A, Vaughan R S
Anaesthesia. 1977 Sep;32(8):790-3. doi: 10.1111/j.1365-2044.1977.tb10083.x.
This paper describes the construction and evaluation of a simple anti-pollution device for use with the McKesson nasal mask for dental anaesthesia. The device is attached to the expiratory valve of the mask and spilled halothane vapour is adsorbed onto activated charcoal. In theatre use, comparing similar dental anaesthesia sessions, it resulted in a reduction of approximately 78% in the mean halothane concentration (vol./vol.) at a point equidistant from the expiratory valve as the faces of surgeon and anaesthetist. This percentage reduction was consistent with the weight gained by the activated charcoal container (Cardiff 'Aldasorber') compared with the weight of halothane vapourised.
本文描述了一种与用于牙科麻醉的麦基森鼻罩配套使用的简易防污染装置的构建与评估。该装置连接到面罩的呼气阀上，溢出的氟烷蒸汽被吸附到活性炭上。在手术室使用中，对比相似的牙科麻醉过程，在与呼气阀距离相等且与外科医生和麻醉师面部处于同一位置的一点，其平均氟烷浓度（体积/体积）降低了约78%。该降低百分比与活性炭容器（加的夫“Aldasorber”）增加的重量相对于蒸发的氟烷重量是一致的。
