Patent ID: 9636104
Date: 2017-05-02
CPC Classifications: A61B,A61M

Claim:
1. A cannula for use in laparoscopic surgery performed through a wall of a body cavity, the cannula comprising: an elongated tubular section having a tubular section proximal end, a tubular section distal end, and a wall, the wall having an interior surface defining an interior of the tubular section and an exterior surface, the tubular section open at both the proximal and distal ends and having a central axis; a first passage through the wall of the tubular section, inclined with respect to the central axis, the first passage comprising a first opening through the wall of the tubular section at a position adjacent the proximal end of the tubular section, and a second opening through the wall of the tubular section adjacent to the distal end of the tubular section at a position on the tubular wall diametrically opposed to the position of the first opening, the first and second openings being aligned so that a first straight suture needle may be passed through both the first and second openings with a section of the needle intermediate the first and second openings transversing an interior of the tubular section at an angle of inclination to said central axis, and with a distal end of the needle projecting out of the second opening and through the wall of the body cavity; and a blocking member having a blocking member proximal end and a blocking member distal end, the blocking member slidably supported on the elongated tubular section for motion along said exterior surface of the wall of the tubular section between a first position in which the blocking member blocks flow of gases through said second opening and a second position clear of said second opening allowing passage of said first straight suture needle through said second opening, wherein the blocking member distal end is spaced apart from the distal end of the tubular section and is located proximal to the second opening when the blocking member is in said second position.