Patent ID: 8574238

Claim:
A surgical cannula kit comprising a cannula and an obturator: wherein the cannula includes a proximal end, a distal end and a central longitudinal axis, the cannula comprising an annular flange at the proximal end, the flange having a central opening, a top surface and a bottom surface, a body extending from the annular flange to the distal end of the cannula, the body including a proximal portion adjacent to the annular flange and an interior surface defining a central axial channel extending from the central opening of the annular flange to the distal end, the body being open at the distal end, the body further including an exterior surface and having raised threads extending outwardly from the exterior surface of the body between the annular flange and the distal end; wherein the cannula further comprises a pair of spaced surfaces defining a through slot extending radially across the entire flange and through the entire thickness of the flange, the through slot further extending distally through the proximal portion of the body from the exterior surface to the interior surface, the through slot terminating at a location distal to the bottom surface of the annular flange and proximal to the distal end of the cannula; wherein the cannula further comprises a pair of spaced surfaces defining a longitudinal slot extending through the flange, threads and body of the cannula from the proximal end to the distal end, the longitudinal slot providing a passageway between the longitudinal channel of the cannula and the exterior of the cannula along the entire length of the cannula; wherein the obturator includes a proximal portion, a distal portion terminating in a distal end, an intermediate portion and a flange between the intermediate portion and the proximal portion, the obturator being sized and shaped so that the intermediate portion is receivable and slidable in the central axial channel of the cannula; and wherein the obturator further comprises a pair of spaced surfaces defining a longitudinal slot in the distal portion, intermediate portion, flange and proximal portion.