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US 7,087,054 B2Granted
Electrosurgical instrument and method of use
AssigneeSurgRx, Inc.
InventorsCsaba Truckai, John H. Shadduck
Life of this patent
Estimating the term…
Abstract
An electrosurgical medical device and method for creating thermal welds in engaged tissue. In one embodiment, at least one jaw of the instrument defines a tissue engagement plane that carries a recessed central portion. In another embodiment, the controller coupled to the Rf source is adapted to switch from a power control operational mode to a voltage controlled operational mode at a selected transition impedance level.
Claims15
An electrosurgical jaw structure for delivering energy to engaged tissue, the structure comprising:
- first and second openable-closeable jaw members, at least one jaw member defining a first peripheral portion and a second central portion wherein the second portion is recessed relative to the first portion;
- at least one jaw carrying a conductive material comprising a positive temperature coefficient material, the a positive temperature coefficient material capable of conducting current to engaged tissue;
- and an Rf source operatively coupled to the conductive material.
An electrosurgical jaw structure for delivering energy to engaged tissue, the structure comprising:
- first and second paired jaw members each defining a respective surface engagement plane for contacting tissue, the paired jaw members moveable between an open and closed position;
- the paired jaw members defining a peripheral portion and a central portion;
- wherein the paired jaw members in the closed position define an engagement gap between respective engagement planes that has a first dimension in the peripheral portion and a second dimension in the central portion, and wherein said second dimension is greater than said first dimension, wherein a portion of at least of one the jaw members comprises a positive temperature coefficient material, the a positive temperature coefficient material capable of conducting current to engaged tissue.
Dependencies are inferred from the claim text.