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Airflow perturbation device and method for measuring respiratory resistance

  • US 6,066,101 A
  • Filed: 04/20/1998
  • Issued: 05/23/2000
  • Est. Priority Date: 04/20/1998
  • Status: Expired due to Term
First Claim
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1. An airflow perturbation device, comprising:

  • a housing;

    an airflow/differential pressure conversion device on an input side of said housing, said airflow/differential pressure conversion device having an input and an output and first and second pressure taps thereupon;

    an alternating perturbation mechanism movably attached to said housing and disposed at the output of said airflow/differential pressure conversion device, said alternating perturbation mechanism alternatingly blocking and unblocking the output of the airflow/differential pressure conversion device;

    a moving device attached to said housing for moving said alternating perturbation mechanism;

    a first pressure transducer connected to said first differential pressure tap for determining a first differential pressure;

    a second pressure transducer attached to said second differential pressure tap for determining a second differential pressure; and

    a perturbation adjustment mechanism on the input side of the housing, said perturbation adjustment mechanism for adjusting a perturbation level, said perturbation level determined based upon output from the first and second pressure transducers,said first and second pressure transducers providing an output signal which is provided to a signal processing means for determining parameters associated with a respiratory system of a patient inhaling and exhaling through the airflow/differential pressure conversion device.

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