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

  • US 5,795,787 A
  • Filed: 04/09/1996
  • Issued: 08/18/1998
  • Est. Priority Date: 04/09/1996
  • Status: Expired due to Term
First Claim
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1. An apparatus for measuring nitric oxide exhaled from the lungs of a person comprising:

  • (a) conduit means for receiving the air exhaled by the person;

    (b) means for introducing resistance in said conduit means for increasing the pressure in the mouth of the person during exhalation to substantially close the vellum and exclude nitric oxide emerging from the nasal cavity 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.

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