Patent ID: 9033872
Filing Date: 2015-05-19
Classification: A61B,A61M

Abstract:
1. A cannula for use in laparoscopic surgery performed through a wall of a body cavity, the cannula comprising: an elongated tubular section having interior walls open at both its proximal and distal ends and having a central axis; a first passage through the walls of the tubular section, inclined with respect to the central axis, the first passage having a first opening through the wall of the tubular section 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 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 the interior of the tubular section and with a distal end of the needle projecting out of the second opening and through the wall of the body cavity; a first manually controllable valve disposed adjacent a proximal end of the first passage which may be placed in an open position to allow clearance for the needle or a closed position, when the needle is not in the first passage, to block the flow of gases through the first passage; a conduit extending through the wall of the tubular section to connect to an insufflation gas source at an exterior of the wall at one end and the first passage at its other end; a second valve disposed in said conduit; and a gas valve extending across the interior of the tubular section on a proximal side of a connection between the conduit and the interior of the tubular section; whereby the cannula can be used as a guide for a trocar to form an incision through the wall of the body cavity so that the cannula may be inserted through the incision, allowing the body cavity to be insufflated through said conduit in the body cavity, as a laparoscopic entry port, and as a device to allow suturing the cavity closed using the needle.