Lunn J N, Mapleson W W, Hillard E K
Br Med J. 1971 Dec 11;4(5788):653-6. doi: 10.1136/bmj.4.5788.653.
Air was "breathed" in the laboratory through a heated-water humidifier and a breathing tube. Several different humidifiers and tubes were used. The temperature rise of the air on passing through the humidifier and the temperature drop on passing through the tube were measured. Both were dependent on ventilation. Insulating the tube and humidifier together with the insertion of baffles in the latter reduced the rise and fall and their dependence on ventilation. With suitable design the dependence on ventilation and the need to use high water temperatures could be greatly reduced. In addition, a thermostat with a reduced dead zone is needed.
在实验室中，空气通过热水加湿器和呼吸管“吸入”。使用了几种不同的加湿器和管子。测量了空气通过加湿器时的温度升高以及通过管子时的温度下降。两者都取决于通风情况。将管子和加湿器一起进行绝缘处理，并在加湿器中插入挡板，可减少温度的升高和降低以及它们对通风的依赖性。通过适当的设计，对通风的依赖性以及使用高水温的必要性可大大降低。此外，还需要一个死区减小的恒温器。
