Infusion array ablation apparatus

• US 20050203503A1
• Filed: 01/12/2005
• Published: 09/15/2005
• Est. Priority Date: 11/08/1993
• Status: Abandoned Application

• Current Assignee: AngioDynamics, Inc.
• Original Assignee: Rita Medical Systems Incorporated (AngioDynamics, Inc.)
• Inventors: Baker, James, Edwards, Stuart D., Lax, Ronald G., Sharkey, Hugh
• Application Number:
  US11/034,503
• Publication Number:
  US 20050203503A1
• Time in Patent Office: Days
• US Class Current: 606/33
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 2017/00026 Conductivity or impedance, e.g. of tissue
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 2017/00101 using an array of thermosensors
• CPC Class Codes: A61B 2018/00011 with fluids
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/00273 Anchoring means for temporary attachment of a device to tissue
• CPC Class Codes: A61B 2018/00452 Skin
• CPC Class Codes: A61B 2018/00476 Hair follicles
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/00666 : using a threshold value
• CPC Class Codes: A61B 2018/00678 : upper
• CPC Class Codes: A61B 2018/00702 : Power or energy
• CPC Class Codes: A61B 2018/00708 : switching the power on or off
• CPC Class Codes: A61B 2018/00726 : Duty cycle
• CPC Class Codes: A61B 2018/00744 : Fluid flow
• CPC Class Codes: A61B 2018/00761 : Duration
• CPC Class Codes: A61B 2018/00779 : Power or energy
• CPC Class Codes: A61B 2018/00791 : Temperature
• CPC Class Codes: A61B 2018/00797 : measured by multiple temperature sensors
• CPC Class Codes: A61B 2018/00821 : measured by a thermocouple
• 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 2018/124 : switching the output to different electrodes, e.g. sequentially
• CPC Class Codes: A61B 2018/1253 : monopolar
• CPC Class Codes: A61B 2018/126 : bipolar
• CPC Class Codes: A61B 2018/1425 : Needle
• CPC Class Codes: A61B 2018/143 : multiple needles
• CPC Class Codes: A61B 2018/1432 : curved
• CPC Class Codes: A61B 2018/1435 : Spiral
• CPC Class Codes: A61B 2018/1472 : for use with liquid electrolyte, e.g. virtual electrodes
• CPC Class Codes: A61B 2018/162 : located on the probe body
• CPC Class Codes: A61B 2018/1861 : with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61B 2218/002 : Irrigation
• CPC Class Codes: A61M 25/007 : Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61N 1/06 : for high-frequency therapy
• CPC Class Codes: A61N 1/403 : for thermotherapy, e.g. hyperthermia
• CPC Class Codes: A61N 5/02 : using microwaves
• CPC Class Codes: A61N 5/04 : Radiators for near-field treatment
• CPC Class Codes: A61N 5/045 : specially adapted for treatment inside the body
• CPC Class Codes: B22F 2999/00 : Aspects linked to processes or compositions used in powder metallurgy
• CPC Class Codes: B22F 3/1216 : Container composition
• CPC Class Codes: C22C 1/047 : comprising intermetallic compounds C22C1/0441 takes precedence
• CPC Class Codes: C22C 14/00 : Alloys based on titanium
• CPC Class Codes: C22C 33/0285 : with Cr, Co, or Ni having a minimum content higher than 5%
• CPC Class Codes: C22F 1/183 : of titanium or alloys based thereon

Abstract

An infusion array ablation apparatus includes an elongated delivery device having a lumen and an infusion array positionable in the lumen. The infusion array includes an RF electrode and at least a first and a second infusion member. Each infusion member has a tissue piercing distal portion and an infusion lumen. At least one of the first or second infusion members is positionable in the elongated delivery device in a compacted state and deployable from the elongated delivery device with curvature in a deployed state. Also, at least one of the first or second infusion members exhibits a changing direction of travel when advanced from the elongated delivery device to a selected tissue site. At least one infusion port is coupled to one of the elongated delivery device, the infusion array, the first infusion member or the second infusion member.

Claims

1. A tissue ablation apparatus comprising:

a delivery catheter having a distal end and a proximal end;

an electrode deployment device positioned at least partially in the elongate member and including at least one retractable electrode that is adapted to be inserted into tissue, is adapted to penetrate tissue, and is adapted to extend to a selected tissue site, said at least one retractable electrode having a non-deployed state when positioned in the elongate member, and being preformed to assume a curved shape when deployed, and being operatively connected to a microwave power source; and

wherein the at least one electrode is advanceable in and out of the distal most end of the elongate member.

2. The apparatus of claim 1, wherein the delivery catheter is operatively coupled to an RF or a microwave power source.

3. The apparatus of claim 1, wherein the at least one electrode is operatively coupled to an RF and a microwave power source or a power source switchable between RF and microwave.

4. The apparatus of claim 3, wherein one of the delivery catheter or the at least one electrode is operatively coupled to the RF power source and the other is operatively coupled to the microwave power source.

5. The apparatus of claim 1, further comprising:

at least one thermal sensor coupled to at least one of the at least one electrodes.

6. The apparatus of claim 5, further comprising:

a display for displaying temperature values measured at the at least one sensor.

7. The apparatus of claim 5, further comprising:

a feedback control system operatively coupled to the at least one sensor and the RF or microwave power source.

8. The apparatus of claim 7, wherein the feedback control adjusts at least one of (i) a power level, (ii) a duty cycle, and (iii) an energy delivery in response to the temperature measured at the at least one sensor.

9. The apparatus of claim 7, further comprising:

a controller coupled to the energy source and at least one of(i) the at least one thermal sensor and (ii) the feedback control to adjust the energy supplied to the at least one electrode in response to the temperature measured at the at least one sensor.

10. The apparatus of claim 1, wherein said at least one electrode comprises at least two electrodes, each being operatively coupled to the microwave power source, each of the at least two electrodes having an energy delivery surface to create an ablation volume between the energy delivery surfaces.

11. The apparatus of claim 1, wherein each of the at least one electrodes include at least one thermal sensor.

12. The apparatus of claim 1, further comprising:

an insulation sleeve positioned in a surrounding relationship around at least a portion of the at least one electrode.

13. The apparatus of claim 12, wherein the insulation sleeve is adjustably moveable along an exterior of the at least one electrode.

14. The apparatus of claim 1, wherein the at least one electrode is hollow and coupled to an infusion medium source to receive an infusion medium.

15. A method for creating an ablation volume in a selected tissue mass, comprising:

providing an ablation device with a delivery catheter, at least one electrode being operatively coupled to a microwave energy source, and at least one thermal sensor coupled to at least one of the at least one electrodes;

inserting the delivery catheter into the selected tissue mass with the at least one electrode distal end positioned in the delivery catheter lumen;

advancing the at least one electrode distal end out of the delivery catheter lumen and into the selected tissue mass;

delivering electromagnetic energy from the microwave energy source to the at least one electrode; and

creating an ablation volume in the selected tissue mass.

16. The method of claim 15, wherein said at least one electrode comprises at least two electrodes, each having an energy delivery surface, are advanced from the delivery catheter, and an ablation volume is created between the two electrodes energy delivery surfaces.

17. The method of claim 16, wherein the at least two electrodes are advanced out of a distal end of the delivery catheter.

18. The method of claim 16, wherein the at least two electrodes are advanced out of separate ports formed in the delivery catheter.

19. The method of claim 16, further comprising:

delivering energy from an energy source to the delivery catheter, wherein the delivery catheter is operatively coupled to an energy source and has an energy delivery surface.