Trocar assembly with obturator design

An obturator for use in penetrating tissue, which comprises:

• an elongate member defining a longitudinal axis, and having a proximal end and a distal end;
• and
• a penetrating member adjacent the distal end of the elongate member and having a distal penetrating tip dimensioned to pass through tissue, the penetrating member defining an external wall leading to the penetrating tip, the external wall including first and second series of raised elements arranged in diametrical opposed relation, the raised elements of each series being arranged in spaced relation along the longitudinal axis whereby spaced regions are defined between adjacent raised elements to accommodate tissue displaced during passage of the penetrating member through tissue.

An obturator for use in penetrating tissue, which comprises:

• an elongate member defining a longitudinal axis, and having a proximal end and a distal end;
• and
• a penetrating member adjacent the distal end of the elongate member and having a distal penetrating tip dimensioned to pass through tissue, the penetrating member defining an external wall leading toward the penetrating tip, the external wall including first and second continuous raised elements arranged in diametrical opposed relation, each raised elements having a length relative to the longitudinal axis substantially greater than a width relative to a transverse axis transverse to the longitudinal axis.