Patent ID: 6210397
Filing Date: 2001-04-03
Classification: A61B,A61M

Abstract:
A sealing cannula for inserting through body tissue and forming a passageway through the body tissue for inserting medical instruments, the sealing cannula comprising:a hollow cylindrical member having an exterior surface;a flange extending from said exterior surface and having an upper surface and a lower surface; anda thread on the exterior surface of said cylindrical member which terminates at a thread end spaced a distance from the lower surface of the flange sufficient to accommodate a layer of body tissue, the thread end having a planar surface substantially parallel to the lower surface of said flange such that the planar surface of the thread end and the lower surface of the flange cooperate to compress upon the layer of body tissue when the hollow cylindrical member is threaded into an aperture formed in the layer of body tissue to thereby automatically seal the aperture against leakage along the exterior surface of the cylindrical member.