System for sampling gas or odor from exhaled air, has an external dead zone volume for the gas to be extracted into, and a gas sensor for study and analysis

摘要

When sampling gas or odor from exhaled breath, internal part-volumes of the exhaled breath are formed into an external dead zone volume (E), which can be defined for their origin, and passed to a gas sensor (I) for investigation. (E) is a vessel, with a capacity equal to the exhaled breath volume. The exhaled breath is taken through a mouthpiece and valve. The extraction channel leads (I).