Patent ID: 8128590

Claim:
An insufflating surgical instrument adapted for movement across an abdominal wall to insufflate an abdominal region of a patient, comprising: a cannula comprising a wall forming a lumen extending along an axis between the proximal end and a distal end and adapted for connection to a source of fluid under pressure at the proximal end; and a trocar insertable into and removable from the lumen of the cannula; the trocar comprising: a shaft having a wall forming a lumen extending between a proximal end and a distal end; and an insufflation channel configured such that fluid from the cannula flows into the trocar; a tip at the distal end of the shaft enclosing the distal end of the shaft; and at least one vent hole formed at the tip or along the shaft, the vent hole being in connection with the insufflation channel and being adapted to expel the fluid under pressure to insufflate the abdominal region.