Abstract: A self-extinguishing conduit for conveying a gas capable of supporting combustion of the conduit interior from an upstream to a downstream location includes a combustible tubing and a flow occluder operatively associated with the combustible tubing. The flow occluder is actuated by the heat of combustion within the combustible tubing to substantially halt the flow of gas through the combustible tubing. A combustion resistant material defines a select length of the conduit interior and is provided in series with the combustible tubing. The flow occluder is located downstream and proximate the combustion resistant material. A method for extinguishing combustion within a combustible conduit carrying a combustion supporting gas includes halting migration of combustion within the conduit at a select location and occluding the conduit at the select location.

Abstract: A hose assembly for a breathing system has a corrugated flexible breathing hose with a first adaptor at one (machine) end of the hose for connection to an anesthesia machine remote from the subject patient using the hose for breathing. The adaptor has a cylindrical wall with a sampling port projecting laterally from the wall. A second adaptor is at the opposite (patient) end of the hose for connection to a breathing mask or endotracheal tube. A gas sample tube inside the hose has a sample entrance end projecting from the patient end adaptor a specified amount, extends through the entire length of the hose to the sampling port where it can communicate with a luer-lock connector and external sampling line to a gas sample monitor or, in another embodiment, the tube itself extends to the monitor.