초록

A patient breathing apparatus is disclosed which includes a liquid drain connected to receive liquid condensation. The drain includes a barrier which is water permeable and gas impermeable when wet. The barrier may be provided with a water soluble layer that is gas impermeable when dry.

대표청구항 ▼

A liquid drain for a patient breathing system in which gas is supplied to a patient comprising housing means including an upper hollow portion adapted for connection in fluid communication with said breathing systems and for receiving liquid precipitation from the system, a lower hollow portion adap

A liquid drain for a patient breathing system in which gas is supplied to a patient comprising housing means including an upper hollow portion adapted for connection in fluid communication with said breathing systems and for receiving liquid precipitation from the system, a lower hollow portion adapted to receive liquid precipitation from said upper portion, and liquid permeable, gas impermeable barrier means including a first layer of hydrophilic material which is gas permeable when dry and liquid permeable and gas impermeable when wetted by a liquid, and a water soluble second layer on a side of said first layer which is substantially gas impermeable to prevent gas to flow through said barrier when said second layer is dry but is dissolvable when precipitated liquid contacts it, said barrier means being disposed between said upper and lower portions so that liquid precipitation is flowable through said barrier means to said lower portion from said upper portion but said barrier means prevents gas flow to said lower portion.