Rotating electrical connector for RF energy enabled tissue debridement device

• US 10,376,302 B2
• Filed: 02/18/2016
• Issued: 08/13/2019
• Est. Priority Date: 02/18/2015
• Status: Active Grant

• Current Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Xomed Incorporated (Medtronic Plc)
• Inventors: Prisco, John R., Detmers, Eric P., Li, Wenjeng, Little, David J., Richart, Patrick, Valdez, Jose
• Primary Examiner(s): Fowler, Daniel W
• Assistant Examiner(s): Maziarski, Katherine E
• Application Number:
  US15/046,853
• Publication Number:
  US 20160235468A1
• Time in Patent Office: 1,272 Days
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/00208 actively driven, e.g. by a motor
• CPC Class Codes: A61B 2018/00321 Head or parts thereof
• CPC Class Codes: A61B 2018/00565 Bone
• CPC Class Codes: A61B 2018/00589 Coagulation
• CPC Class Codes: A61B 2018/00595 Cauterization
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/0063 Sealing
• CPC Class Codes: A61B 2018/00916 with means for switching or controlling the main function of the instrument or device
• CPC Class Codes: A61B 2018/126 bipolar
• CPC Class Codes: A61B 2018/142 at least partly surrounding the target, e.g. concave, curved or in the form of a cave
• CPC Class Codes: A61B 2018/1452 including means for cutting A61B2018/146 takes precedence
• CPC Class Codes: A61B 2218/002 Irrigation
• CPC Class Codes: A61B 2218/007 Aspiration

Abstract

A bipolar electrosurgical device is disclosed that operates in a mechanical cutting mode and a hemostasis mode. The device includes a housing and a blade assembly extending from the housing. The blade assembly forms a cutting tip and cutting window at a distal end region to provide mechanical cutting of tissue and first and second electrode assemblies to provide electrical energy to tissue. The first and second electrode assemblies can each include a rotary connection assembly to allow spatial orientation of the cutting window relative to the housing and/or cutting tip.

Claims

1. An irrigated, bipolar electrosurgical device having a rotary electrical connection assembly, comprising:

an outer connector defining an engagement surface;

an inner connector rotatably disposed within the outer connector about a rotational axis, comprising;

a first surface in contact with the engagement surface of the outer connector; and

a second surface opposite the first surface; and

an extension member extending from the second surface in a direction away from the first surface, the member defining a natural position and a deflected position; and

an electrode defining an outer arcuate connecting surface positioned in contact with the extension member such that the extension member is in the deflected position;

wherein the connecting surface is positioned at a proximal end of the electrode and wherein the electrode includes a distal end opposite the proximal end, the distal end defining an electrode surface configured to deliver electrical energy;

and further wherein electrical energy provided to the outer connector is delivered to the electrode via the inner connector.

2. The connection assembly of claim 1, wherein the extension member includes a pair of opposed tabs, each tab includes a first end connected with the second surface and a second end opposite the first end, the second end rotating about the first end when the extension member transitions between the natural position and the deflected position.

3. The connection assembly of claim 2, wherein each second end deflects relative to the respective first end when in contact with the electrode.

4. The connection assembly of claim 1, wherein the extension member includes first and second ends connected to the second surface and an intermediate portion positioned between the first and second ends, wherein the intermediate portion deflects relative to the first and second ends when in contact with the electrode.

5. The connection assembly of claim 1, wherein the engagement surface is formed of opposed arcuate segments forming a partial ring-like structure.

6. The connection assembly of claim 1, wherein the first surface of the inner connector forms a partial ring-like structure.

7. The connection assembly of claim 1, wherein the engagement surface extends about the rotational axis at least 180 degrees.

8. The connection assembly of claim 1, wherein the first surface extends about the rotational axis at least 180 degrees.

9. The connection assembly of claim 1, wherein the distal end defines a cutting window.

10. The connection assembly of claim 1, wherein for a 360 degree rotation of the inner connector about the rotational axis, the second surface maintains contact with the engagement surface.

11. A bipolar electrical device having a proximal region and a distal region, the device comprising:

a housing positioned at the proximal region;

a first electrode assembly disposed within the housing, the first electrode assembly including a first stationary portion, a first rotating portion rotatably disposed within the first stationary portion and a first electrode coupled with the first rotating portion through a first extension member engaging a first outer arcuate connecting surface of the first electrode, wherein the first electrode defines a first electrode surface positioned at the distal region;

a second electrode assembly disposed within the housing and electrically isolated from the first electrode assembly, the second electrode assembly including a second stationary portion, a second rotating portion rotatably disposed within the second stationary portion and a second electrode coupled with the second rotating portion through a second extension member engaging a second outer arcuate connecting surface, wherein the second electrode defines a second electrode surface positioned at the distal region;

a hub rotatably disposed within the housing and connected with the first electrode assembly and the second electrode assembly, wherein upon rotation of the hub relative to the housing, the first rotating portion, the first electrode, the second rotating portion and the second electrode rotate with respect to the first stationary portion and the second stationary portion; and

an irrigation path fluidly coupled with the hub and configured to deliver fluid from the proximal region to the distal region.

12. The bipolar electrical device of claim 11, wherein the first electrode is connected in fixed relation with the hub such that rotation of the hub about the rotation axis relative to the housing causes rotation of the first electrode relative to the housing.

13. The bipolar electrical device of claim 11, wherein the irrigation path is connected in fixed relation with the hub such that rotation of the hub about the rotation axis relative to the housing causes rotation of the irrigation path relative to the housing.

14. The bipolar electrical device of claim 11, wherein the device establishes an electrical current flow path along the first electrode assembly from the first stationary portion to the first rotating portion, then from the first extension member of the first rotating portion to the first outer arcuate connecting surface of the first electrode, and then from the first outer arcuate connecting surface to the first electrode surface.

15. A bipolar electrical device, comprising:

a proximal region maintaining a housing having a first electrical connection and a second electrical connection electrically isolated from the first electrical connection, the first and second electrical connections disposed within the housing and selectively electrically connected to wiring disposed within the housing;

a distal region opposite the housing;

an outer shaft rotatably disposed within the housing, the outer shaft defining a lumen, an outer circumference, a proximal end and a distal end opposite the proximal end, wherein the proximal end defines a first connection surface electrically connected with the first electrical connection and the distal end defines an outer shaft cutter defining a window in the outer shaft and a first electrode surface;

an inner shaft rotatably disposed within the lumen of the outer shaft, the inner shaft defining a distal portion opposite the proximal region, the distal portion further including an inner shaft cutter defining a cutting window in the inner shaft;

an electrode body rotatably disposed within the housing, extending along the outer circumference of the outer shaft to the distal region and electrically isolated from the outer shaft, the electrode body defining a second connection surface electrically connected with the second electrical connection and a second electrode surface spaced apart from the first electrode surface;

a hub rotatably disposed within the housing to support the outer shaft and the electrode body for rotation about a rotation axis, wherein upon rotation of the hub 360 degrees about the rotational axis, the outer shaft and the electrode body rotate relative to the housing and relative to the wiring, the first connecting surface maintains electrical connection with the first electrical connection and the second connecting surface maintains electrical connection with the second electrical connection; and

an irrigation path fluidly coupled with the hub and configured to deliver fluid from the proximal region to the distal region.

16. The bipolar electrical device of claim 15, wherein the electrode body is connected in fixed relation with the hub such that rotation of the hub about the rotation axis relative to the housing causes rotation of the electrode body relative to the housing.

17. The bipolar electrical device of claim 15, wherein the irrigation path is connected in fixed relation with the hub such that rotation of the hub about the rotation axis relative to the housing causes rotation of the irrigation path relative to the housing.

18. The bipolar electrical device of claim 15, wherein the first electrical connection includes a rotating portion rotatably disposed within a stationary portion, and further wherein the rotating portion includes an extension member in electrical contact with and extending away from the first connection surface of the outer shaft, and even further wherein an electrical current flow path is established from the stationary portion to the rotating portion, from the extension member of the rotating portion to the first connection surface, and from the first connection surface to the first electrode surface, and even further wherein the stationary portion is uncoupled from the hub such that with rotation of the hub, the rotating portion rotates and the stationary portion remains stationary.

19. The bipolar electrical device of claim 18, wherein the irrigation path is defined by a tube coupled to the hub, the tube being separate from the outer shaft and the inner shaft, and further wherein tube rotates with rotation of the hub.

20. A surgical system comprising:

a blade assembly, comprising;

a proximal region maintaining a housing having a first electrical connection and a second electrical connection electrically isolated from the first electrical connection, the first and second electrical connections disposed within the housing and selectively electrically connected to wiring disposed within the housing;

a distal region opposite the housing;

an outer shaft rotatably disposed within the housing, the outer shaft defining a lumen, an outer circumference, a proximal end and a distal end opposite the proximal end, wherein the proximal end defines a first connection surface electrically connected with the first electrical connection and the distal end defines an outer shaft cutter defining a window in the outer shaft and a first electrode surface;

an inner shaft rotatably disposed within the lumen of the outer shaft, the inner shaft defining a distal portion opposite the proximal region, the distal portion further including an inner shaft cutter defining a cutting window in the inner shaft;

an electrode body rotatably disposed within the housing, extending along the outer circumference of the outer shaft to the distal region and electrically isolated from the outer shaft, the electrode body defining a second connection surface electrically connected with the second electrical connection and a second electrode surface spaced apart from the first electrode surface;

a hub rotatably disposed within the housing to support the outer shaft and the electrode body for rotation about a rotation axis;

an irrigation path fluidly coupled with the hub and configured to deliver fluid from the proximal region to the distal region;

a handpiece coupled with the blade assembly, comprising;

an actuator assembly coupling the hub to the handpiece, the actuator assembly including an actuator rotatably mounted to the handpiece such that a portion of the actuator is exteriorly exposed for manual interface by a user;

wherein the actuator causes rotation of the window and the hub relative to the housing such that, upon rotation of the hub 360 degrees about the rotational axis, the outer shaft and the electrode body rotate relative to the housing and relative to the wiring, the first connecting surface maintains electrical connection with the first electrical connection and the second connecting surface maintains electrical connection with the second electrical connection.

21. The system of claim 20, wherein the blade assembly further includes a button activation assembly coupled to the housing for providing electrical communication between a source of energy through each of the first and second electrical contacts to the first and second electrode surfaces, the button activation assembly including a button exteriorly exposed for manual interface by a user, further wherein the actuator is rotatable relative to an actuator axis perpendicular to the rotational axis, and further wherein connection between the hub and the electrode body includes first and second orientations of the button relative to the handpiece, each orientation separated by 180 degrees relative to the rotational axis and extending perpendicular to the actuator axis.

22. The system of claim 20, wherein the electrode body is connected in fixed relation with the hub such that rotation of the hub about the rotation axis relative to the housing causes rotation of the electrode body relative to the housing.

23. The system of claim 20, wherein the irrigation path is connected in fixed relation with the hub such that rotation of the hub about the rotation axis relative to the housing causes rotation of the irrigation path relative to the housing.