DESIGN OF TROCAR ASSEMBLY WITH OBTURATOR

摘要

PROBLEM TO BE SOLVED: To provide an improved obturator as regards a trocar assembly for use in minimally invasive surgical procedures, such as endoscopic or laparoscopic type procedures.;SOLUTION: The obturator 100 for use in penetrating tissue includes an elongate member 102 defining a longitudinal axis, and having a proximal end and a distal end, and a penetrating member 104 adjacent to the distal end of the elongate member 102. The penetrating member 104 has a distal penetrating tip 124 dimensioned to pass through the tissue. The penetrating member 104 defines an external wall 134 leading toward the penetrating tip 124. The external wall 134 includes a plurality of raised elements extending at least radially outwardly relative to the longitudinal axis and being in general longitudinal alignment. Adjacent raised elements are spaced along the longitudinal axis to thereby accommodate tissue displaced during passage of the penetrating member 104 through the tissue. The raised elements are dimensioned to be generally atraumatic to the tissue. The raised elements may define an arcuate profile.;COPYRIGHT: (C)2013,JPO&INPIT