Apparatus for thermal treatment of tissue

• US 6,526,320 B2
• Filed: 05/16/2001
• Issued: 02/25/2003
• Est. Priority Date: 11/16/1998
• Status: Expired due to Fees

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Mitchell, James
• Primary Examiner(s): Gibson, Roy D.
• Application Number:
  US09/859,140
• Publication Number:
  US 20020002393A1
• Time in Patent Office: 650 Days
• Field of Search: 606/41, 606/45, 606/46, 606/47, 606/48, 606/49, 606/50, 607/96, 607/98, 607/99, 607/101, 607/102
• US Class Current: 607/101
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 2017/00274 Prostate operation, e.g. prostatectomy, turp, bhp treatment
• CPC Class Codes: A61B 2018/00547 Prostate
• CPC Class Codes: A61B 2218/002 Irrigation

Abstract

An apparatus for thermal treatment of tissue, includes an outer member having a frame dimensioned for engagement with the hand of a surgeon and an elongated portion connected to the frame and extending distally therefrom. The elongated portion defines a longitudinal axis and has an axial opening. An electromagnetic probe assembly is releasably mounted to the outer member. The electromagnetic probe assembly includes a handle and an electromagnetic probe connected to the handle. The electromagnetic probe is at least partially positionable within the axial opening of the elongated portion and is adapted for reciprocal longitudinal movement therewithin between a non-deployed position and a deployed positions. A manually operable release member releasably mounts the electromagnetic probe assembly to the outer member. The release member is dimensioned and positioned for manual manipulation to move between a first position engaging the electromagnetic probe assembly and preventing release thereof from the outer member, and a second position releasing the electromagnetic probe assembly to thereby facilitate assembly and disassembly of the electromagnetic probe assembly with respect to the outer member.

Claims

1. An apparatus for thermal treatment of tissue, which comprises:

an outer member including a frame dimensioned for engagement with the hand of a surgeon and an elongated portion connected to the frame and extending distally therefrom, the elongated portion defining a longitudinal axis and having an axial opening;

an electromagnetic probe assembly releasably mounted to the outer member, the electromagnetic probe assembly including a handle and an electromagnetic probe connected to the handle, the electromagnetic probe at least partially positionable within the axial opening of the elongated portion and adapted for reciprocal longitudinal movement therewithin between a non-deployed position and a deployed position; and

a manually operable release member for releasably mounting the electromagnetic probe assembly to the outer member, the release member dimensioned and positioned for manual manipulation to move between a first position engaging the electromagnetic probe assembly and preventing release thereof from the outer member, and a second position releasing the electromagnetic probe assembly to thereby facilitate assembly and disassembly of the electromagnetic probe assembly with respect to the outer member.

2. The apparatus according to claim 1 wherein the release member is mounted to the frame of the outer member.

3. The apparatus according to claim 2 wherein the release member is rotatable about the longitudinal axis to move between the first and second positions thereof.

4. The apparatus according to claim 3 wherein the release member defines a central opening for reception of a portion of the handle of the electromagnetic probe assembly, the portion of the handle dimensioned for reciprocal longitudinal movement through the opening.

5. The apparatus according to claim 4 wherein the handle of the electromagnetic probe assembly includes a handle extension, the handle extension received within the central opening of the release member.

6. The apparatus according to claim 5 wherein the release member is normally biased to the first position thereof.

7. The apparatus according to claim 6 wherein the release member defines an inner cam surface adjacent the opening and wherein the handle extension of the handle defines a corresponding outer cam surface, the outer cam surface cooperating with the inner cam surface upon advancement of the handle extension within the release member to move the release member to the second position thereof.

8. The apparatus according to claim 7 wherein the handle extension defines an outer rail, the outer rail having the outer cam surface at a distal end thereof and defining an abutment surface at a proximal end thereof, the abutment surface dimensioned and configured to engage the release member to prevent removal of the electromagnetic probe assembly from the outer member when the release member is in the first position thereof and the electromagnetic probe is assembled with respect to the outer member.

9. The apparatus according to claim 8 wherein the handle extension includes first and second diametrically opposed outer rails and wherein the release member includes first and second inner cam surfaces.

10. The apparatus according to claim 8 wherein the frame of the outer member includes at least one longitudinal recess dimensioned for reception of the one outer rail to prevent rotational movement of the electromagnetic probe assembly relative to the outer member.

11. The apparatus according to claim 1 including a ratchet and associated pawl mechanism for permitting controlled incremental movement of the electromagnetic probe assembly toward the deployed position while preventing movement of the electromagnetic probe assembly toward its non-deployed position.

12. The apparatus according to claim 11 including a manually engageable release trigger depending from the frame, the release trigger movable to disengage the ratchet and associated pawl mechanism thereby permitting movement of the electromagnetic probe toward the non-deployed position.

13. The apparatus according to claim 12 wherein the electromagnetic probe is normally biased to the non-deployed position.

14. The apparatus according to claim 1 wherein the electromagnetic probe includes a radio frequency electrode.

15. The apparatus according to claim 14 wherein the electromagnetic probe defines an axial channel for passage of fluids, and at least one opening extending through an outer wall of the probe in fluid communication with the axial channel to permit exit of the fluids therefrom.

16. The apparatus according to claim 15 including a source of fluid communication with the axial channel of the electromagnetic probe.

17. The apparatus according to claim 16 wherein the source of fluid includes one of an irrigant fluid or a conductive fluid.

18. The apparatus according to claim 14 including a second electromagnetic probe assembly, the second electromagnetic probe assembly including a radio frequency electrode having different thermal energy transmitting characteristics relative to the first-mentioned radio-frequency electrode of the first-mentioned electromagnetic probe assembly.