Ablation catheter system

• US 5,500,012 A
• Filed: 07/08/1994
• Issued: 03/19/1996
• Est. Priority Date: 07/15/1992
• Status: Expired due to Term

• Current Assignee: Lightwave Ablation Systems, Inc.
• Original Assignee: Angeion Corporation (Niterra Co., Ltd.)
• Inventors: Brucker, Gregory G., Savage, Steven D.
• Primary Examiner(s): Pellegrino, Stephen C.
• Assistant Examiner(s): PEFFLEY, MICHAEL F
• Application Number:
  US08/272,268
• Time in Patent Office: 620 Days
• Field of Search: 606/7, 606/13-16, 128/642, 607/89, 607/115, 607/116, 607/122, 604/22
• US Class Current: 607/122
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• 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 18/24 with a catheter A61B18/26, A61B18/28 take precedence
• CPC Class Codes: A61B 2017/00022 Sensing or detecting at the treatment site
• CPC Class Codes: A61B 2017/00039 Electric or electromagnetic phenomena other than conductivity, e.g. capacity, inductivity, Hall effect
• CPC Class Codes: A61B 2017/00092 using thermocouples
• CPC Class Codes: A61B 2017/00101 using an array of thermosensors
• CPC Class Codes: A61B 2017/00292 mounted on or guided by flexible, e.g. catheter-like, means
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/00279 deployable
• CPC Class Codes: A61B 2018/00797 measured by multiple temperature sensors
• CPC Class Codes: A61B 2018/00815 measured by a thermistor
• CPC Class Codes: A61B 2018/00821 measured by a thermocouple
• CPC Class Codes: A61B 2018/00839 Bioelectrical parameters, e.g. ECG, EEG
• CPC Class Codes: A61B 2018/1467 using more than two electrodes on a single probe
• CPC Class Codes: A61B 2218/002 Irrigation
• CPC Class Codes: A61B 2562/043 : in a linear array
• CPC Class Codes: A61B 5/287 : Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
• CPC Class Codes: A61B 5/6855 : with a distal curved tip
• CPC Class Codes: A61M 2230/04 : Heartbeat characteristics, e.g. ECG, blood pressure modulation

Abstract

An ablation catheter system, including a guiding/mapping catheter assembly and a laser catheter. The guiding/mapping catheter includes ring electrodes, tip electrodes, a moveable fixation wire, and a central catheter lumen for an ablation catheter. A laser catheter includes an optical fiber for passing laser energy, tip electrodes, an optical fiber port, and thermocouples on the end of hypodermic tubing.

Claims

1. A guiding/mapping catheter for use with heart tissue, comprising:

(a) a catheter body comprising a central lumen and a non-collapsible tip structure comprising a distal end;

(b) a plurality of electrodes positioned within the catheter body to communicate with tissue at the distal end of the tip structure, for finding arrythmogenic tissue in planar and non-planar tissue surfaces at an identified location via local activation mapping;

(c) monitor means, operatively coupled to the plurality of electrodes, for identifying the arrythmogenic tissue; and

(d) maneuvering means, within the tip structure, for movement of the catheter along the tissue surface.

2. The guiding/mapping catheter of claim 1 further comprising means for affixing to the wall of the tissue to hold the identified location.

3. The guiding/mapping catheter of claim 1 further comprising means for receiving an ablative catheter down the central lumen.

4. The guiding/mapping catheter of claim 3 further comprising flushing means for providing a fluid which baths a contact point of the ablative catheter with the tissue to keep biological material out of a field of influence of the ablative catheter.

18. The guiding/mapping catheter of claim 1 further comprising maneuvering means external to the catheter body.

5. A catheter system for use with heart tissue, comprising:

(a) a guiding/mapping catheter, comprising;

(i) a catheter body comprising a central lumen and a non-collapsible tip structure comprising a distal end;

(ii) a plurality of electrodes positioned within the catheter body to communicate with tissue at the distal end of the tip structure for finding arrythmogenic tissue in planar and non-planar heart tissue surfaces at an identified location via local activation mapping;

(iii) monitor means, operatively coupled to the plurality of electrodes, for identifying the arrythmogenic tissue; and

(iv) maneuvering means, within the tip structure, for movement of the catheter along the tissue surface; and

(b) an ablation catheter operatively configured for positioning within the central lumen of the guiding/mapping catheter, the ablation catheter comprising;

(i) a catheter body having a proximal end and a distal end;

(ii) a tip structure attached at the distal end of the catheter body;

(iii) ablative means in said catheter body for providing ablative energy to the arrythmogenic tissue; and

(iv) tissue sensing means for measuring directly the effect of the ablative energy on the arrythmogenic tissue.

6. The catheter system of claim 5 wherein the guiding/mapping catheter further includes fixation means for fixating the guiding/mapping catheter to the heart tissue to hold the guiding/mapping catheter at the identified location.

7. The catheter system of claim 5 including means for flushing to keep biological material out of a field of influence of the ablation catheter.

8. The catheter system of claim 5 wherein the guiding/mapping catheter further includes means for receiving the ablative catheter down the central lumen of the guiding/mapping catheter.

9. The catheter system of claim 5 wherein the guiding/mapping catheter further includes means for articulating the distal end of the guiding/mapping catheter inside the heart to move perpendicularly along the wall of the heart.

10. The catheter system of claim 5 further comprising flushing means for providing a flushing fluid which baths a contact point of the ablation catheter with the heart tissue to prevent coagulation of blood and other biological material proximate the contact point.

11. The catheter system of claim 5 wherein the ablation catheter further includes means for measuring the local activation such that an electrophysiological potential of the heart tissue can be monitored.

12. The catheter system of claim 5 wherein the ablation catheter tissue sensing means comprises an integral fixed mechanism for attaching the catheter system to a wall of the tissue.

13. The catheter system of claim 5 wherein the ablation catheter is operatively configured for easy insertion and removal from the guiding/mapping catheter without losing the identified location for ablation.

14. The catheter system of claim 5 wherein said ablative energy is selected from the group consisting of laser energy, radio frequency energy, microwave energy, and chemical energy.

15. The catheter system of claim 5 wherein said ablative energy is RF energy.

16. The catheter system of claim 5 wherein said ablative energy is microwave energy.

17. The catheter system of claim 5 wherein said ablative energy is chemical energy.

19. The catheter system of claim 5 wherein the ablation catheter tissue sensing means comprises an integral movable mechanism for attaching the catheter system to a wall of the tissue.

20. The catheter system of claim 5 wherein the ablation catheter tissue sensing means comprises at least one temperature sensor.

21. A catheter system comprising:

(a) a guiding/mapping catheter comprising;

(i) a central lumen extending through the guiding/mapping catheter;

(ii) a tip at an end of the guiding/mapping catheter; and

(iii) at least one electrode positioned to communicate with tissue at the tip to find arrythmogenic tissue in tissue surfaces at an identified location via local activation mapping; and

(b) an ablation catheter removably inserted within the central lumen of the guiding/mapping catheter, the ablation catheter comprising;

(i) a catheter body having a distal end;

(ii) a tip at the distal end to provide ablative energy to the arrythmogenic tissue; and

(iii) a tissue sensing device to measure the effect of the ablative energy on the arrythmogenic tissue.

22. The catheter system of claim 21, wherein the ablation catheter comprises at least one pin electrode and at least one sensing element disposed at the tip of the ablation catheter.

23. The catheter system of claim 21, wherein the guiding/mapping catheter comprises a fixation element to fix the guiding/mapping catheter to the tissue and to hold the guiding/mapping catheter at the identified location.

24. The catheter system of claim 21, wherein the guiding/mapping catheter comprises a plurality of electrodes positioned within the catheter body.