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Cannula sealing mechanism

  • US 5,167,636 A
  • Filed: 10/24/1991
  • Issued: 12/01/1992
  • Est. Priority Date: 10/24/1991
  • Status: Expired due to Fees
First Claim
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1. A sealing assembly for sealing a cannula used in medical procedures, the cannula being configured to allow passage therethrough of medical devices to a point of use in a patient, the sealing assembly comprising:

  • a conduit piece formed to define at least one channel,a compressible annular seal positioned in the at least one channel,means for compressing the compressible annular seal to provide an airtight seal across the at least one channel,a flap valve positioned in the at least one channel spaced apart and downstream from the compressible annular seal in the direction of the patient,the flap valve comprising first and a second flaps biased to sealingly engage each other,the first and second flaps being configured to move apart to permit passage therethrough of a medical device inserted through the channel of the conduit piece, andwherein because of the spacing between the compressible annular seal and flap valve, a medical device can pass through the compressible annular seal prior to the time it is compressed to provide a seal across the channel and prior to the time it passes through the flap valve to the patient so that initially the flap valve maintains the seal of the cannula and after the compressible seal provides its airtight seal the flap valve can be opened with the compressible seal maintaining the seal of the cannula.

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