Patent ID: 7708713

Claim:
An insufflating surgical instrument adapted for movement across an abdominal wall to insufflate an abdominal region of a patient, comprising: an insufflating cannula having a wall forming a first lumen extending along an axis between a proximal end and a distal end, and a first insufflation channel formed in the wall extending along the axis between the proximal end and the distal end and being adapted for connection to a source of fluid under pressure at the proximal end; an insufflating trocar insertable into and removable from the insufflating cannula, the insufflating trocar having a shaft with a second lumen extending along the axis between a proximal end and a distal end, a second insufflation channel formed at the distal end and being adapted for alignment with the first insufflation channel of the cannula to expel the fluid under pressure to insufflate the abdominal region, and a tip at the distal end of the shaft; and at least one vent hole formed at the tip of the trocar being in connection with the second insufflation channel of the trocar; wherein the shaft and the tip of the insufflating trocar have diameters sized to enable insertion of a laparoscope; a seal housing attached to the proximal end of the insufflating cannula, the seal housing containing a duckbill valve; a proximal cannula seal positioned outside the first and second lumens between the seal housing and the insufflating cannula; a distal cannula seal positioned at the distal end of the insufflating cannula within the first lumen between the insufflating cannula and the insufflating trocar; and an elastomeric lock placed within the second lumen on an inner periphery of the shaft of the insufflating trocar.