ELECTRODE CATHETER FOR INTERVENTION PURPOSES

• US 20080119917A1
• Filed: 09/28/2007
• Published: 05/22/2008
• 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
• Granted Patent: US 8,239,040 B2
• Time in Patent Office: Days
• 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 for intervention purposes, such as a cardiac pacemaker, neurostimulator, ICD electrode, or EP catheter that includes

• • an elongate electrode catheter body (21) having a distal end (24) and a proximal end (26),
  • at least one electrode pole (23) in the area of the distal end (24) of the electrode body (20), and
  • at least one supply line (22), which runs insulated in the electrode body (21) in the main direction (H) from the proximal end to the distal end, to the at least one electrode pole (23), to desensitize the electrode catheter to the radiation of an electromagnetic field of an interfering frequency having a specific wavelength (λ), the supply line (22) changing its run direction at least twice in such a way that it runs at least once opposite to the main direction (H), and 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, such as a cardiac pacemaker, neurostimulator, ICD electrode, or EP catheter, 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); and

,

wherein to desensitize said electrode catheter to radiation of an electromagnetic field of an interfering frequency having a specific wavelength (λ

), said at least one supply line (22) changes its run direction 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 a distance (L1, L2) between two direction changes (R) is shorter than half of a wavelength (λ

/2) of said interfering frequency.

2. The electrode catheter according to claim 1, wherein said distance (L1, L2) between said two direction changes (R) corresponds at most to a fourth (λ

/4) of a wavelength (λ

) of said interfering frequency.

3. The electrode catheter according to claim 1, wherein said distance (L1, L2) between two sequential direction changes (R) of said at least one supply line (22) is greater than a sixteenth (λ

/16) of a wavelength (λ

) 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 4, wherein said at least one supply line (22) is divided by multiple direction changes (R) into alternating short and long legs (L1, L2), wherein a length of said long legs (L1) corresponds to approximately a fourth (λ

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

/8), of said wavelength (λ

) 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.

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 1, 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, wherein said insulation (27) of said at least one supply line (22) comprises a minimally-insulating material or a material insulating as a function of frequency.