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Single use medical aspirating device and method

  • US 5,215,522 A
  • Filed: 04/05/1991
  • Issued: 06/01/1993
  • Est. Priority Date: 07/23/1984
  • Status: Expired due to Term
First Claim
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1. An aspirating assembly comprising:

  • an aspirating catheter tube comprising distal and proximal ends;

    normally-closed valve structure by which aspirating vacuum pressure is selectively communicated to the interior of the catheter tube for evacuation of secretions from the lungs of a patient, the valve structure comprising a valve and a valve body in which a part of the valve may be manually displaced, the valve body comprising normally-closed bore means for connection at opposite ends of the bore means respectively, to the proximal end of said catheter tube and to a source of the vacuum pressure, the valve comprising a one-piece element comprising (a) means simultaneously self-biasing the valve toward a closed position, but accommodating on-going manual displacement of part of the element counter to the self-bias into an open position for opening said bore means across the valve structure to accommodate communication of the vacuum pressure to the interior of the catheter tube, (b) means sealing a portion of the valve to the valve body for preventing entry of atmospheric air, (c) means sealing the valve to the valve body adjacent the bore means against fluid flow beyond the bore means within the valve structure caused by vacuum pressure, and (d) means accommodating fluid flow along the bore means across the valve structure responsive to vacuum pressure when the said part of element is displaced counter to the self-biasing to the open position.

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