Deflectable interstitial ablation device

• US 6,482,203 B2
• Filed: 12/04/2001
• Issued: 11/19/2002
• Est. Priority Date: 09/30/1997
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Lennox, Charles D., Mayberry, James E., Paddock, Kimberly A.
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): Ruddy, David M.
• Application Number:
  US10/004,759
• Publication Number:
  US 20020040221A1
• Time in Patent Office: 350 Days
• Field of Search: 607/101-112, 607/99, 606/41-52, 606/32, 606/34, 604/35, 600/146
• US Class Current: 606/41
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00547 Prostate
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/0091 Handpieces of the surgical instrument or device
• CPC Class Codes: A61B 2018/00916 with means for switching or controlling the main function of the instrument or device
• CPC Class Codes: A61B 2018/00982 combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes
• CPC Class Codes: A61B 2018/1425 Needle
• CPC Class Codes: A61N 1/403 for thermotherapy, e.g. hyperthermia

Abstract

A deflectable interstitial ablation device includes an elongated housing, an electrode mounted within the elongated housing, a driver coupled to the electrode, an imaging device integrally mounted within the elongated housing and a deflection system disposed within the elongated housing. The elongated housing has a proximal end, a distal end, and a deflectable segment. The electrode is deployable from a first position within the elongated housing to a second position a predetermined distance beyond the distal end of the elongated housing. The electrode further has a flexible portion capable of deflecting with the deflectable segment of the elongated housing, and can be deployed by the driver with a sufficient force such that penetration of the urethral wall occurs in a single motion. The imaging device further has a flexible portion capable of deflecting with the deflectable segment of the elongated housing. The deflection system has a proximal end in communication with a steering mechanism, for controllably deflecting the deflectable segment of the elongated housing by any angle. The deflection of the deflectable segment allows deflection of the electrode and the imaging device, thus facilitating proper placement of the electrode.

Claims

1. A deflectable interstitial ablation device, comprising:

an elongated housing having a proximal end, a distal end, and a deflectable segment;

an electrode mounted within the elongated housing and deployable from a first position within the elongated housing to a second position a predetermined distance beyond the distal end of the elongated housing, the electrode having a flexible portion capable of deflecting with the deflectable segment of the elongated housing;

an imaging device integrally mounted within the elongated housing, the imaging device having a flexible portion capable of deflecting with the deflectable segment of the elongated housing and providing a viewing angle beyond the distal end of the elongated housing, wherein the electrode in the second position remains within the viewing angle and is substantially parallel to a central axis of the viewing angle at any angle of deflection of the electrode;

a deflection system disposed within the elongated housing for controllably deflecting the deflectable segment of the elongated housing by any angle, the deflection system having a proximal end in communication with a steer mechanism; and

a foot pedal for remotely activating deployment of the electrode.

2. The deflectable interstitial ablation device of claim 1, wherein the steering mechanism is handle-operable.

3. The deflectable interstitial ablation device of claim 1, wherein the foot pedal is further adapted for activating a temperature sensor disposed near a distal end of the electrode.

4. The deflectable interstitial ablation device of claim 1, wherein the deflectable segment is disposed at the distal end of the elongated housing.

5. A deflectable interstitial ablation device, comprising:

an elongated housing comprising a proximal end, a distal end, and a deflectable segment;

an electrode mounted within the elongated housing, the electrode deployable from a first position within the elongated housing to a second position a predetermined distance beyond the distal end of the elongated housing and in communication with a radio frequency generator;

a temperature sensing system in communication with a distal end of the electrode for measuring a temperature;

a feedback system using data generated from the temperature sensing system for controlling the delivery of radio frequency energy to the electrode;

an imaging device integrally mounted within the elongated housing, the imaging device comprising a flexible portion capable of deflecting with the deflectable segment of the elongated housing and providing a viewing angle beyond the distal end of the elongated housing, wherein the electrode in the second position remains within the viewing angle and is substantially parallel to a central axis of the viewing angle at any angle of deflection of the electrode; and

a deflection system disposed within the elongated housing for controllably deflecting the deflectable segment of the elongated housing by any angle, the deflection system comprising a proximal end in communication with a steering mechanism.

6. The deflectable interstitial ablation device of claim 5, wherein the steering mechanism is handle-operable.

7. The deflectable interstitial ablation device of claim 5, further comprising a impedance monitoring system in communication with a proximal end of the electrode for measuring an impedance.

8. The deflectable interstitial ablation device of claim 7, further comprising a feedback system that uses data generated from the impedance monitoring system for controlling the delivery of radio frequency energy to the electrode.

9. The deflectable interstitial ablation device of claim 7, further comprising a safety feature which cuts off delivery of radio frequency energy to the electrode when temperature or impedance exceed a threshold value.

10. The deflectable ablation device of claim 5, further comprising a safety feature which cuts off delivery of radio frequency energy to the electrode when the temperature exceeds a threshold value.

11. A deflectable interstitial ablation device, comprising:

an elongated housing comprising a proximal end, a distal end, and a deflectable segment;

an electrode mounted within the elongated housing, the electrode deployable from a first position within the elongated housing to a second position a predetermined distance beyond the distal end of the elongated housing and in communication with a radio frequency generator;

an impedance monitoring system in communication with the electrode for measuring an impedance;

a feedback system using data generated from the impedance monitoring system for controlling the delivery of radio frequency energy to the electrode;

an imaging device integrally mounted within the elongated housing, the imaging device comprising a flexible portion capable of deflecting with the deflectable segment of the elongated housing and providing a viewing angle beyond the distal end of the elongated housing, wherein the electrode in the second position remains within the viewing angle and is substantially parallel to a central axis of the viewing angle at any angle of deflection of the electrode; and

a deflection system disposed within the elongated housing for controllably deflecting the deflectable segment of the elongated housing by any angle, the deflection system comprising a proximal end in communication with a steering mechanism.

12. The deflectable interstitial ablation device of claim 11, wherein the steering mechanism is handle-operable.

13. The deflectable interstitial ablation device of claim 11, further comprising a temperature sensing system for measuring a temperature.

14. The deflectable interstitial ablation device of claim 13, further comprising a feedback system that uses data generated from the temperature sensing system for controlling the delivery of radio frequency energy to the electrode.

15. The deflectable interstitial ablation device of claim 11, further comprising a safety feature which cuts off delivery of radio frequency energy to the electrode when impedance exceeds a threshold value.

16. The deflectable interstitial ablation device of claims 13, further comprising a safety feature which cuts off delivery of radio frequency energy to the electrode when temperature or impedance exceed a threshold value.

17. A deflectable interstitial ablation device, comprising:

an elongated housing comprising a proximal end, a distal end, and a deflectable segment,

a basket disposed along a length of the elongated housing, the basket adapted for maintaining the placement of the device in a body umen;

an electrode mounted within the elongated housing and deployable from a first position within the elongated housing to a second position a predetermined distance beyond the distal end of the elongated housing, the electrode comprising a flexible portion capable of deflecting with the deflectable segment of the elongated housing;

an imaging device integrally mounted within the elongated housing, the imaging device comprising a flexible portion capable of deflecting with the deflectable segment of the elongated housing;

a deflection system, disposed within the elongated housing for controllably deflecting the deflectable segment of the elongated housing by any angle, the deflection system comprising a proximal end in communication with a steering mechanism; and

a driver for deploying the electrode from the first position to the second position.

18. The deflectable interstitial ablation device of claim 17, wherein the basket comprises a wire mesh attached to an outer surface of the housing.