Sennhauser F H, Sly P D
Department of Thoracic Medicine, Royal Children's Hospital, Melbourne, Australia.
Arch Dis Child. 1989 Sep;64(9):1305-7. doi: 10.1136/adc.64.9.1305.
The valve system in the mouth piece of two spacer devices was analysed. Pressures required to open and close the non-rebreathing valve were very low (less than 0.1 kPa). Inspiratory flow requirements were within physiological limits for infants' normal tidal breathing. Expiratory flow requirements varied significantly, and the flow required to prevent rebreathing from the chamber may exceed the physiological flow limits for normal tidal breathing.
对两种储雾罐装置咬嘴中的阀门系统进行了分析。打开和关闭非重复呼吸阀所需的压力非常低(小于0.1千帕)。吸气流量要求在婴儿正常潮式呼吸的生理限度内。呼气流量要求差异很大,防止从储气室重复呼吸所需的流量可能超过正常潮式呼吸的生理流量限度。