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Medico-surgical tube including improved means for administering liquid or gas treatment

  • US 5,207,655 A
  • Filed: 05/15/1991
  • Issued: 05/04/1993
  • Est. Priority Date: 05/15/1991
  • Status: Expired due to Term
First Claim
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1. A medical-surgical tube comprising:

  • a tube having a major lumen defined by an inner periphery of a wall of the tube;

    an injection lumen within the wall of the tube; and

    at least one one-way valve means in the wall for allowing fluid to flow from the injection lumen in one direction through the wall of the tube, the valve means preventing the passage of fluid in an opposite direction through the wall and back into the injection lumen, the valve means comprising a piercing in the wall of the tube, the piercing being inclined at an angle other than 90°

    with respect to a direction of flow of fluid passing through the injection lumen.

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