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Portable respiratory diagnostic device

  • US 20040249300A1
  • Filed: 06/03/2003
  • Published: 12/09/2004
  • Est. Priority Date: 06/03/2003
  • Status: Active Grant
First Claim
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1. A self-contained device for measuring a respiratory parameter of a subject having lungs with a capacity comprising:

  • a portable housing including a tube defining a chamber;

    at least one of a mouthpiece and a mask releasably secured to said housing and in fluid communication with said chamber;

    at least one of an airflow sensor and a pressure sensor disposed in said housing in fluid communication with said chamber and adapted to measure at least one of airflow and pressure within the chamber; and

    a pump disposed substantially entirely in said housing, said flow source operated in an active mode and passive mode, said flow source in said active mode enabling the subject to perform tidal breathing, said pump in said passive phase generating a gas flow of respiratory gas that travels through said chamber to the at least one of a mouthpiece and a face mask so that the respiratory gas inflates the lungs of the subject to a pre-selected portion of the capacity.

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