Ablating arrangement

• US 6,350,263 B1
• Filed: 04/15/1999
• Issued: 02/26/2002
• Est. Priority Date: 04/15/1998
• Status: Expired due to Term

• Current Assignee: Biotronik Mess-Und Therapiegeraete GmbH & Company Ingenieurbuero Berlin (Biotronik SE & Company KG)
• Original Assignee: Biotronik Mess-Und Therapiegeraete GmbH & Company Ingenieurbuero Berlin (Biotronik SE & Company KG)
• Inventors: Graf, Markus, Wetzig, Thomas, Sachse, Steffen, Pohl, Olaf
• Primary Examiner(s): COHEN, LEE S
• Application Number:
  US09/291,331
• Time in Patent Office: 1,048 Days
• Field of Search: 600/374, 600/393, 606/41, 606/34, 606/10-12, 607/99, 607/113
• US Class Current: 606/41
• 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 2018/00351 Heart
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00654 with individual control of each of a plurality of energy emitting elements
• CPC Class Codes: A61B 2018/00666 using a threshold value
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00761 Duration
• 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 2018/00839 Bioelectrical parameters, e.g. ECG, EEG
• 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 2018/1467 using more than two electrodes on a single probe

Abstract

An ablation arrangement (1) for the targeted production of local lesions in living tissue inside the body, particularly inside the heart, comprising at least one energy source (15), a plurality of energy uncoupling elements (11b to 11g) that are attached to a holding element (11a), a plurality of energy transmission lines (19.1) that connect the energy source or the energy sources to the energy uncoupling elements and switching elements (9.3) that are assigned to the energy transmission lines for setting up or interrupting a connection between the energy source and respectively one energy uncoupling element, with program control means (9.1) for a time-sequential actuation of at least some of the switching elements according to an ablation program.

Claims

1. An ablation arrangement for the targeted production of local lesions in living tissue inside a body, comprising:

at least one energy source;

a holding element;

a plurality of energy uncoupling elements mounted on the holding element;

a plurality of energy transmission lines, each energy transmission line connecting the at least one energy source to a respective one of the energy uncoupling elements;

switching elements associated with the energy transmission lines for one of making and interrupting a connection between the at least one energy source and each respective energy uncoupling element; and

program control means, including a program memory storing a control program, for providing a time dependent actuation of at least some of the switching elements according to the control program wherein the control program is influenced by at least one variable thereby changing the time dependent actuation of the remaining switching elements to obtain a timed sequence of ablation pulses via the energy uncoupling elements.

2. An ablation arrangement according to claim 1, wherein the program memory is a read/write memory for recording different programs.

3. An ablation arrangement according to claim 1, further including means for changing a stored basic ablation program in dependence on at least one variable that is input prior to or during the treatment and/or measured during the treatment.

4. An ablation arrangement according to claim 1, wherein the energy source comprises an HF power source (15), the holding element as comprises a catheter body, the energy uncoupling elements comprise electrodes, the energy transmission lines comprise electrical lines (19.1) and the switching elements comprise electromechanical or electronic switches.

5. An ablation arrangement according to claim 1, wherein the energy source comprises a high-powered radiation source, the holding element comprises a catheter body, the energy transmission lines and the energy uncoupling elements comprise a waveguide arrangement and the switching elements comprise electro-optical switching elements.

6. An ablation arrangement according to claim 5, wherein the energy uncoupling elements further comprise electrodes, and further comprising a stimulation pulse generator connectable to one of the electrodes at least for certain periods of time via at least one of the switching elements and at least one of the transmission lines in dependence on an output signal from the program control means.

7. An ablation arrangement according to claim 5, wherein the energy uncoupling elements further comprise electrodes arranged for recording intracardiac electrogram signals (IEGM) or monophase action potentials and further comprising a first measuring signal processing unit for evaluating said signals.

8. An ablation arrangement according to claim 5, wherein the high-powered radiation source is a laser.

9. An ablation arrangement according to claim 1, wherein the energy uncoupling elements simultaneously function as first sensors and further comprising a first measuring signal processing unit for evaluating recorded measured signals connectable to the energy transmission lines, wherein the individual energy uncoupling elements are connectable at least during some time intervals to the input of the first measuring signal processing unit under control of the program control means.

10. An ablation arrangement according to claim 9, wherein the energy uncoupling elements comprise electrodes arranged for recording intracardiac electrogram signals (IEGM) or monophase action potentials and the first measuring signal processing unit is for evaluating said signals.

11. An ablation arrangement according to claim 9, and further comprising means for influencing the control program including a plurality of second sensors assigned to the energy uncoupling elements, a second measuring signal processing unit and switching means connected to an output of the second measuring signal processing unit for changing the control program in dependence on the signals detected with the second sensors.

12. An ablation arrangement according to claim 11, further comprising a multiplexer assigned to the second sensors and controlled by the program control means (9.1;

100) in dependence on the control program, for picking up the sensor signals via measuring signal transmission lines or connections (9.1e;

9.1f), the number of which is lower as compared to the number of sensors.

13. An ablation arrangement according to claim 11, wherein the plurality of second sensors are temperature sensors.

14. An ablation arrangement according to claim 9, wherein the energy uncoupling elements further comprise electrodes, and further comprising a stimulation pulse generator connectable to one of the electrodes at least for certain periods of time via at least one of the switching elements and at least one of the transmission lines in dependence on an output signal from the program control means.

15. An ablation arrangement according to claim 1, wherein the at least one energy source comprises a single energy source.

16. An ablation arrangement according to claim 1, wherein the program control means includes at least one shutdown timer which functions as a safety shutoff for all energy transmission lines in dependence of predetermined shutdown conditions.

17. An ablation arrangement according to claim 1, wherein the program control means and the switching elements are housed in one of a separate switching device and a switching device that is integrated into a basic device, which is connected on an input side via two serial data lines, one current supply line and one energy transmission line section to an ablation device.

18. An ablation arrangement according to claim 1, wherein the body is a heart.