Apparatus and method for sealing and cutting tissue

• US 7,270,660 B2
• Filed: 06/29/2005
• Issued: 09/18/2007
• Est. Priority Date: 09/09/1997
• Status: Expired due to Fees

• Current Assignee: Sherwood Services AG
• Original Assignee: Sherwood Services AG
• Inventors: Ryan, Thomas Patrick
• Primary Examiner(s): Dawson; Glenn K.
• Application Number:
  US11/170,616
• Publication Number:
  US 20060020265A1
• Time in Patent Office: 811 Days
• Field of Search: None
• US Class Current: 606/38
• CPC Class Codes: A61B 18/1442 Probes having pivoting end effectors, e.g. forceps
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2018/145 wherein the effectors remain parallel during closing and opening

Abstract

An axial elongate bipolar tissue sealer/cutter and method of use by a surgeon for electrosurgery on tissue. A chassis on a handle extends axially for axial movement. An effector on a distal end of the chassis first contacts tissue with axial movement. The effector provides bipolar electrosurgery. A member extending from the distal end is opposite the patient end of a tube. A part on the member is transverse to the axis to conduct electrosurgery. First and second bipolar electrodes on the effector and part are electrically isolated. A generator for bipolar electrosurgery supplies the electrodes. An activator is movably supported on the handle connects to the tube and/or chassis to axially move the patient end and its effector relative to the part. Tissue and bodily fluid therebetween are sealed or cut through application of compression and bipolar electrosurgery between the first and second electrodes. The effector and the part have complimentary sealing or cutting surfaces for partial mating engagement upon axial movement toward one another.

Claims

1. A bipolar electrosurgical system for sealing and cutting tissue, comprising:

an electrosurgical generator;

a tissue sealing instrument including a chassis having a longitudinal axis defined therethrough and first and second end effectors attached thereto, one of said first and second end effectors being movable along said longitudinal axis relative to the other of said first and second end effectors from a first position for positioning tissue therebetween to a second position for grasping tissue between said first and second end effectors, wherein said first and second end effectors include complimenting vessel sealing electrodes which partially matingly engage one another, said electrodes adapted to be connected to the electrosurgical generator such that the electrodes are capable of sealing and cutting tissue disposed therebetween upon activation of said electrodes;

an activator for moving said end effectors from the first to second positions;

a sensor disposed within the electrosurgical generator which measures the impedance across the tissue held between said end effectors;

means for selectively applying electrosurgical energy from the electrosurgical generator to said end effectors in response to the impedance measurement across the tissue from said sensor; and

wherein the chassis is operatively connected to at least one tube.

2. A bipolar instrument according to claim 1 wherein the activator includes a handle, the handle including at least one handle grip.

3. A bipolar instrument according to claim 1 wherein the chassis includes an inner tube and an outer tube.

4. A bipolar instrument according to claim 1 wherein the first and second end effectors include complimentary vessel contacting surfaces which partially matingly engage upon movement of the end effectors from the first to second positions.

5. A bipolar instrument according to claim 4 wherein the complimentary vessel contacting surfaces are curvilinear.

6. A bipolar instrument according to claim 4 wherein the complimentary vessel contacting surfaces are substantially flat.

7. A bipolar instrument according to claim 4 wherein the complimentary vessel contacting surfaces are triangular.

8. A bipolar instrument according to claim 4 wherein the complimentary vessel contacting surfaces further include nibs.