Electrode catheter for intervention purposes

• US 8,239,040 B2
• Filed: 09/28/2007
• Issued: 08/07/2012
• Est. Priority Date: 11/17/2006
• Status: Active Grant

• Current Assignee: Vascomed GMBH (Micro Systems Technologies Management AG)
• Original Assignee: Biotronik VI Patent AG (Biotronik SE & Company KG)
• Inventors: Geistert, Wolfgang
• Primary Examiner(s): Layno, Carl H
• Assistant Examiner(s): PORTER, JR, GARY A
• Application Number:
  US11/863,319
• Publication Number:
  US 20080119917A1
• Time in Patent Office: 1,775 Days
• Field of Search: 607/115, 607/116, 600372-374, 606 13- 17
• US Class Current: 607/116
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/086 Magnetic resonance imaging [MRI] compatible leads
• CPC Class Codes: A61N 1/3718 Monitoring of or protection against external electromagnetic fields or currents

Abstract

An electrode catheter that includes an elongate electrode catheter body having a distal end and a proximal end, at least one electrode pole in the area of the distal end of the electrode body, and at least one supply line, which runs insulated in the electrode body in the main direction (H) from the proximal end to the distal end, to the at least one electrode pole, wherein the at least one supply line is configured to desensitize the electrode catheter to the radiation of an electromagnetic field of an interfering frequency having a specific wavelength(λ), with the supply line changing its run direction at least twice in such a way that it runs at least once opposite to the main direction (H), the distance (L1,L2) between two direction changes (R) is shorter than half of the wavelength (λ/2) of the interfering frequency.

Claims

1. An electrode catheter for intervention purposes, configured to coupled with a cardiac pacemaker, neurostimulator, ICD electrode, or EP catheter, comprising:

an electrode body (20) comprising an elongate electrode catheter body (21) having a distal end (24) and a proximal end (26);

at least one electrode pole (23) in an area of said distal end (24) of said electrode body (20);

at least one supply line (22), which runs insulated in said electrode body (21) in a main direction (H) from said proximal end to said distal end, to said at least one electrode pole (23);

wherein to desensitize said electrode catheter to radiation of an electromagnetic field radiated by a magnetic resonance diagnostic device of an interfering frequency having a specific wavelength (λ

), said at least one supply line (22) changes run direction at least twice so that three portions of said at least one supply line are situated in a longitudinal portion of said electrode body where said run direction changes at least twice in such a way that said at least one supply line (22) runs at least once opposite to said main direction (H) and twice along said main direction (H), and a distance (L2) between two direction changes (R) is shorter than approximately half of a wavelength (λ

/2) of said interfering frequency; and

,

wherein said at least one supply line comprises no discrete components including inductors or capacitors within said electrode body (21).

2. The electrode catheter according to claim 1, wherein said distance(L2) between said two direction changes (R) corresponds at most to a fourth of said wavelength (λ

/4) of said interfering frequency.

3. The electrode catheter according to claim 1, wherein said distance (L2) between two sequential direction changes (R) of said at least one supply line (22) is greater than a sixteenth of said wavelength (λ

/16) of said interfering frequency.

4. The electrode catheter according to claim 1, wherein said at least one supply line (22) has multiple direction changes (R) along its course.

5. The electrode catheter according to claim 1 wherein said at least one supply line (22) comprises direction changes (R) of alternating long and short legs (L1, L2), wherein a length of said long legs (L1) corresponds to approximately a fourth of said wavelength (λ

/4) of said interfering frequency and wherein a length of said short legs (L2) corresponds to approximately an eighth of said wavelength (λ

/8) of said interfering frequency.

6. The electrode catheter according to claim 1, wherein said at least one supply line (22) is laid meandering or looped in its course because of direction changes (R).

7. The electrode catheter according to claim 6, wherein said at least one supply line (22) is additionally twisted or coiled in its course to form coils.

8. The electrode catheter according to claim 1, wherein said at least one supply line (22) is implemented as a wire, lead, coil, or printed circuit.

9. The electrode catheter according to claim 7, wherein said coils of said at least one supply line (22) do not contact, are contacted, overlap, or intertwine in an area of two neighboring direction changes (R).

10. The electrode catheter according to claim 1, further comprising insulation (27) associated with said at least one supply line (22) that comprises a minimally-insulating material or a material that insulates as a function of frequency.

11. An electrode catheter for intervention purposes, configured to coupled with a cardiac pacemaker, neurostimulator, ICD electrode, or EP catheter, comprising:

an electrode body (20) comprising an elongate electrode catheter body (21) having a distal end (24) and a proximal end (26);

at least one electrode pole (23) in an area of said distal end (24) of said electrode body (20);

at least one supply line (22), which runs insulated in said electrode body (21) in a main direction (H) from said proximal end to said distal end, to said at least one electrode pole (23) wherein said at least one supply line (22) is divided by multiple direction changes (R) into alternating long and short legs (L1, L2), wherein a length of said long legs (L1)corresponds to approximately a fourth of said wavelength (λ

/4) of said interfering frequency and wherein a length of said short legs (L2) corresponds to approximately an eighth of said wavelength (λ

/8) of said interfering frequency;

wherein to desensitize said electrode catheter to radiation of an electromagnetic field radiated by a magnetic resonance diagnostic device of an interfering frequency having a specific wavelength (λ

), said at least one supply line (22) changes run direction at least twice so that three portions of said at least one supply line are situated in a portion of said electrode body where said run direction changes at least twice in such a way that said at least one supply line (22) runs at least once opposite to said main direction (H) and twice along said main direction (H), and a distance (L2) between two direction changes (R) is shorter than approximately half of a wavelength (λ

/2) of said interfering frequency; and

,

wherein said at least one supply line (22) comprises no discrete components including inductors or capacitors within said electrode body (21).

12. The electrode catheter according to claim 11, wherein said distance (L2) between said two direction changes (R) corresponds at most to a fourth of said wavelength (λ

/4) of said interfering frequency.

13. The electrode catheter according to claim 11, wherein said distance (L2) between two sequential direction changes (R) of said at least one supply line (22) is greater than a sixteenth of said wavelength (λ

16) of said interfering frequency and wherein energy absorbed by said at least one supply line occurs along lengths of greater than said sixteenth (λ

/16) of said wavelength of said interfering frequency.

14. The electrode catheter according to claim 11, wherein said at least one supply line (22) is laid meandering or looped in its course because of direction changes (R).

15. The electrode catheter according to claim 14, wherein said at least one supply line (22) is additionally twisted or coiled in its course to form coils.

16. The electrode catheter according to claim 15, wherein said coils of said at least one supply line (22) do not contact, are contacted, overlap, or intertwine in an area of two neighboring direction changes (R).

17. The electrode catheter according to claim 11, wherein said at least one supply line (22) is implemented as a wire, lead, coil, or printed circuit.