Method and apparatus for the measurement of exhaled nitric oxide in humans

摘要

An apparatus for measuring nitric oxide exhaled from the lungs of a person comprises (a) a conduit for receiving the air exhaled by the person; (b) a resistor for increasing the pressure in the mouth of the person during exhalation to close the nasopharynx and to maintain a constant flow rate of said air exhaled by the person; and, (c) measuring means for measuring the nitric oxide concentration in said exhaled air.