End Effector Assembly for Electrosurgical Devices and System for Using the Same

• US 20090248021A1
• Filed: 03/10/2009
• Published: 10/01/2009
• Est. Priority Date: 03/31/2008
• Status: Abandoned Application

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: McKenna, Nicole
• Application Number:
  US12/400,901
• Publication Number:
  US 20090248021A1
• Time in Patent Office: Days
• US Class Current: 606/51
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2017/00119 alarm; indicating an abnormal situation
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/00666 using a threshold value
• CPC Class Codes: A61B 2018/00678 upper
• CPC Class Codes: A61B 2018/00827 Current
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2018/00892 Voltage
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: A61B 2018/1467 using more than two electrodes on a single probe

Abstract

A bipolar forceps is provided and includes a housing having one or more shafts that extend therefrom that operatively support an end effector assembly at a distal end thereof. The end effector assembly includes first and second jaw members. A tissue sealing plate disposed on each of the jaw members is provided. The tissue sealing plates is configured to support a plurality of electrodes thereon and arranged in vertically opposing pairs along the length of the jaw members. The plurality of electrodes is adapted to independently connect to an electrosurgical energy source such that each vertically opposing electrode pairs form an independently controllable electrical circuit when tissue is held between the jaw members. A control system having one or more algorithms for independently controlling and/or monitoring the delivery of electrosurgical energy from the electrosurgical energy source to the plurality of electrodes is also provided.

Claims

1. A bipolar forceps, comprising:

a housing having at least one shaft that extends therefrom that operatively supports an end effector assembly at a distal end thereof, the end effector assembly including first and second jaw members pivotably connected to each other and moveable relative to one another from an open spaced apart position to a closed position to grasp tissue;

a tissue sealing plate disposed on each of the jaw members, each tissue sealing plate being configured to support a plurality of electrodes thereon arranged in vertically opposing pairs along the length of the jaw members, each of the plurality of electrodes adapted to independently connect to an electrosurgical energy source such that each vertically opposing electrode pair forms an independently controllable electrical circuit when tissue is grasped between the first and second jaw members; and

a control system having at least one algorithm for at least one of independently controlling and monitoring the delivery of electrosurgical energy from the electrosurgical energy source to the plurality of electrodes.

2. A bipolar forceps according to claim 1, wherein the at least one algorithm is configured to determine a threshold condition when an electrical parameter is reached, the electrical parameter selected from the group consisting of impedance, voltage, and current.

3. A bipolar forceps according to claim 1, wherein the plurality of electrodes are insulated from each other by a non-conductive material.

4. A bipolar forceps according to claim 1, wherein the at least one algorithm is configured to re-route the electrosurgical energy to only those electrode pairs that require additional electrosurgical energy to reach an end seal condition when the threshold condition is reached.

5. A bipolar forceps according to claim 1, wherein an abnormal electrode pair “

end seal”

condition causes the at least one algorithm to execute an override command if certain other electrical or physical conditions do not correlate to a safe end seal condition.

6. A bipolar forceps according to claim 1, wherein an abnormal electrode pair “

end seal”

condition causes the at least one algorithm to execute a re-grasp alarm if certain other electrical or physical conditions do not correlate to a safe end seal condition.

7. A bipolar forceps according to claim 1, wherein the control system is configured to query the electrode pairs individually upon a condition being met prior to adjusting electrical delivery.

8. A bipolar forceps according to claim 1, wherein the control system is configured to query the electrode pairs together upon a condition being met prior to adjusting electrical delivery.

9. A method for performing an electrosurgical procedure, the method comprising the steps of:

providing a bipolar forceps including first and second jaw members pivotably connected to each other, a tissue sealing plate disposed on each of the jaw members, each tissue sealing plate configured to support a plurality of electrodes thereon arranged in vertically opposing pairs along the length of the jaw members, each of the plurality of electrodes adapted to independently connect to an electrosurgical energy source such that each vertically opposing electrode pair forms an independently controllable electrical circuit when tissue is held between the first and second jaw members;

delivering electrosurgical energy from the electrosurgical energy source to the plurality of electrodes on each of the seal plates;

measuring the impedance levels across tissue at each of the plurality of electrodes;

comparing the measured values of impedance levels at each of the plurality of electrodes with known threshold values of impedance; and

adjusting the amount of electrosurgical energy being delivered to each of the plurality of electrodes as needed.