Patent ID: 8740898

Claim:
A method of sealing and dividing tissue, comprising the steps of: providing a forceps including an end effector assembly disposed at a distal end thereof, the end effector assembly including first and second jaw members disposed in opposed relation relative to one another, at least one of the jaw members moveable with respect to the other between a spaced-apart position and at least one approximated position for grasping tissue therebetween, at least one of the jaw members adapted to connect to a source of electrosurgical energy, a chamber defined within and extending longitudinally along at least one of the jaw members, the chamber configured to retain a fluid therein; positioning the jaw members such that tissue to be sealed and divided is disposed between the jaw members; moving the jaw members to the approximated position to grasp tissue disposed therebetween and such that at least a portion of tissue is disposed within the chamber; and supplying electrosurgical energy to at least one of the jaw members such that the electrosurgical energy is conducted between the jaw members and through tissue grasped therebetween to seal tissue grasped therebetween, the application of electrosurgical energy to at least one of the jaw members heating the fluid within the chamber to thermally expand the fluid and divide the sealed tissue grasped between the jaw members.