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Medical lavage apparatus and methods

  • US 5,254,086 A
  • Filed: 07/31/1992
  • Issued: 10/19/1993
  • Est. Priority Date: 07/31/1992
  • Status: Expired due to Term
First Claim
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1. A liquid and physiological debris aspirating apparatus comprising:

  • an aspirating syringe comprising an aspirating cylinder and an aspirating plunger, the cylinder being associated with a liquid and debris influent port and a liquid and debris effluent port;

    at least one of said ports comprising a one-way physiological debris-passing slit valve comprising a dome-shaped diaphragm having a convex surface and a concave surface, the diaphragm comprising at least one curvilinear slit disposed between the convex and concave surfaces and comprising normally closed contiguously abutting slit edge surfaces which remain contiguous responsive to pressure applied to the convex surface of the diaphragm and which slit edge surfaces separate from each other responsive to pressure applied top the concave side of diaphragm due to manual manipulation of the aspirating plunger in respect to the aspirating cylinder to open the diaphragm to accommodate flow of liquid and physiological debris between the separated slit edge surfaces.

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