techer： Oxygen therapy has been used in patient care in the 18th century and today it is used in almost all forms of acute respiratory failure.
Student： How many linds of equipment are used to deliver oxygen to patient？
T： There are three functional groups which are designed to deliver oxygen to the spontaneously breathing patient：
①Face masks.
②Nasal cannulae.
③Tents and boxes.
S： Is humidification very important？
T： Yes， the most well known example is the woulfe bottle. It works simply by bubbling the dry gas through water at room temperature.
老师：吸氧治疗在18世纪就开始应用了。今天差不多用于所有形式的急性呼吸衰竭。
学生：有多少种设备可用来为病人输氧？
老师：为自动呼吸的病人输送氧气的设备有三组：
①氧罩。
②鼻管。
③氧气帐及氧气盒。
学生：湿化很重要吗？
老师：是的，最常用的是湿化瓶，它只是在室温下把干燥的氧气在水瓶中滤过。
