CARDIAC OR CEREBRAL VESSEL MICROLEAD WITH ELECTRODE RING

• US 20130310898A1
• Filed: 05/16/2013
• Published: 11/21/2013
• Est. Priority Date: 05/16/2012
• Status: Active Grant

• Current Assignee: Sorin CRM SAS (MicroPort Scientific Corp.)
• Original Assignee: SORN CRM SAS
• Inventors: Shan, Nicolas, D'Hiver, Philippe, Ollivier, Jean-Franois
• Granted Patent: US 9,265,929 B2
• Time in Patent Office: Days
• US Class Current: 607/62
• CPC Class Codes: A61B 2562/125 characterised by the manufacture of electrodes
• CPC Class Codes: A61N 1/05 for implantation or insertion into the body, e.g. heart electrode A61N1/06 takes precedence
• CPC Class Codes: A61N 1/0534 Electrodes for deep brain stimulation
• CPC Class Codes: A61N 1/056 Transvascular endocardial electrode systems
• CPC Class Codes: A61N 1/372 Arrangements in connection with the implantation of stimulators
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

A method of manufacturing a detection/stimulation lead for implantation into a venous, arterial, or lymphatic network is shown and described. The method includes providing a microcable comprising a sheath of insulating material covering an electrically conductive core. The method further includes surrounding a portion of the microcable with an electrically conductive metal ring. The method also includes crimping the ring such that the thickness of the sheath is penetrated by a portion of the metal ring and such that an electrical connection is formed between the metal ring and the electrically conductive core.

Claims

1. A method of manufacturing a detection/stimulation lead for implantation into a venous, arterial, or lymphatic network, comprising:

providing a microcable comprising a sheath of insulating material covering an electrically conductive core;

surrounding a portion of the microcable with an electrically conductive metal ring; and

crimping the ring such that the thickness of the sheath is penetrated by a portion of the metal ring and such that an electrical connection is formed between the metal ring and the electrically conductive core.

2. The method of claim 1, further comprising:

pushing insulating material beneath the metal ring to areas adjacent the edges of the metal ring.

3. The method of claim 1, further comprising:

continuing the crimping until the sheath penetration creates a puncture area in the sheath which is a continuous circumferential region and located in a plane perpendicular to the axis of the microcable and sheath.

4. The method of claim 1, further comprising:

discontinuing the crimping before the sheath penetration results in a continuous circumferential region.

5. The method of claim 4, further comprising:

forming a plurality of puncture areas of the sheath via the crimping, leaving areas of continuity of insulation between sheath parts located on either side of the ring.

6. The method of claim 5, further comprising:

forming the ring to include at least one interior relief adapted to define a puncture area of the corresponding sheath.

7. The method of claim 6, wherein said relief comprises a longitudinal profile positioned to share an elongated axis with the microcable.

8. The method of claim 7, wherein said relief comprises a thickened portion formed on an interior or exterior surface of the ring.

9. The method of claim 8, wherein, in a longitudinal direction, said relief does not extend up to an edge of the ring.

10. The method of claim 1, further comprising:

forming the ring to include a plurality of grooves on the ring'"'"'s inner face.

11. The method of claim 10, wherein the plurality of grooves comprise helical grooves.

12. The method of claim 1, wherein the wall thickness of the ring is between 20 and 100 μ

m, wherein the length of the ring is between 0.5 and 1.5 mm, wherein the wall thickness of the sheath is between 5 and 50 μ

m, and wherein the material of the ring comprises an alloy of platinum-iridium or palladium.

13. The method of claim 1, wherein the surface material of the microcable comprises an alloy of the group:

MP35N or MP35NLT.

14. The method of claim 1, wherein the sheath comprises an electrically insulating polymer material selected from the following group:

polyurethanes (PU), polyester (PET), polyamides (PA), polycarbonates (PC), polyimides, fluoropolymers, polyether-ether-ketone (PEEK), poly-p-xylylene (parylene), polymethyl methacrylate (PMM), PTFE (polytetrafluoroethylene), FEP (perfluorinated propylene), PFA (perfluoroalkoxy copolymer resin), THV (tetrafluoroethylene, hexafluoropropylene, fluoride vinylidene), PVDF (polyvinylidene fluoride), EFEP (ethylene fluorinated ethylene propylene) and ETFE (ethylene tetrafluoroethylene).

15. A detection/stimulation lead for implanting in a venous, arterial or lymphatic network, the lead comprising:

a conductor adapted to be connected to the generator of an active implantable medical device;

a sheath of electrically insulating polymer material covering the conductor on its periphery and along its length; and

at least one detection/stimulation electrode formed by a metal ring electrically connected to the conductor via a crimped location which punctures the sheath and thereby contacts the conductor.

16. The lead of claim 15, wherein the external diameter of the lead is equal to or less than 2 French (0.66 mm) and the lead does not include an internal lumen for a guidewire.

17. The lead of claim 15, wherein the ring comprises two end portions extending in a longitudinal direction perpendicular to the elongated axis of the lead, wherein the two end portions are on either side of a central portion, wherein the end portions do not directly contact the conductor and are in direct contact with the sheath.

18. The lead of claim 15, wherein the ring is crimped on the microcable in a location not previously stripped of the sheath and not punctured prior to the crimping.

19. A metal ring for installation as an electrode on a microcable, comprising:

an elongated ring having an internal lumen; and

two end portions surrounded by a middle portion, wherein the middle portion is at least partially collapsed into the internal lumen prior to crimping the middle portion around the microcable, wherein the middle portion is sized and shaped to puncture a sheath of the microcable when the middle portion is crimped around the microcable.

20. The metal ring of claim 19, wherein at least the middle portion of the interior surface of the ring comprises helically oriented ribs.