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High frequency ventilation

  • US 4,805,612 A
  • Filed: 10/26/1987
  • Issued: 02/21/1989
  • Est. Priority Date: 09/13/1985
  • Status: Expired due to Term
First Claim
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1. A method of ventilating a patient comprising:

  • simultaneously delivering a flow of gas to both the first and the second sides of a piston which is diaphragmatically sealed in an oscillator;

    directing the flow of gas delivered to said first side of said piston through a means for moving said piston back and forth within said oscillator, thereby cooling said oscillator;

    moving said piston a selected distance back and forth within said oscillator, thereby creating a polar pressure wave in said flow of gas delivered to said second side of said piston;

    directing the flow of gas delivered to said second side of said piston into the lungs of a patient; and

    venting the flow of atmosphere directed into the lungs of the patient to the atmosphere.

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