Medical leads with segmented electrodes and methods of fabrication thereof

Patent metadata

Field	Value
Publication number	US-2016263370-A1
Application number	US-201615163012-A
Country	US
Kind code	A1
Filing date	May 24, 2016
Priority date	Dec 5, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

In one embodiment, a method for fabricating a neurostimulation stimulation lead comprises: providing a plurality of ring components and hypotubes in a mold; placing an annular frame with multiple lumens over distal ends of the plurality of hypotubes to position a portion of each hypotube within a respective lumen of the annular frame; molding the plurality of ring components and the hypotubes to form a stimulation tip component for the stimulation lead, wherein the molding fills interstitial spaces between the plurality of ring components and hypotubes with insulative material; and forming segmented electrodes from the ring components after performing the molding.

First claim

1 . A neurostimulation lead for implant within a body of a patient for stimulation of neural tissue of the patient, the neurostimulation lead comprising:
a lead body comprising a plurality of conductor wires; and a molded stimulation tip end comprising a plurality of segmented electrodes, hypotubes, and an annular frame structure; wherein (i) the hypotubes are connected to respective electrodes, the annular frame structure comprises a plurality of lumens with respective hypotubes disposed within corresponding lumens, and the hypotubes are connected to respective ones of the plurality of conductor wires of the lead body.

2 . The neurostimulation lead of claim 1 wherein the plurality of conductor wires are disposed in a helical configuration within the lead body.

3 . The neurostimulation lead of claim 1 wherein the plurality of hypotubes extend from the stimulation tip end in respective staggered lengths.

4 . The neurostimulation lead of claim 1 wherein the plurality of hypotubes and an inner diameter of each electrode are coated with one or more respective polyxylylene polymers.

5 . A neurostimulation system, comprising:
an implantable pulse generator for generating electrical pulses to application to tissue of a patient; a neurostimulation lead for implant within a body of a patient for stimulation of neural tissue of the patient, the neurostimulation lead comprising: a lead body comprising a plurality of conductor wires; and a molded stimulation tip end comprising a plurality of segmented electrodes, hypotubes, and an annular frame structure: wherein the hypotubes are connected to respective electrodes, the annular frame structure comprises a plurality of lumens with respective hypotubes disposed within corresponding lumens, and the hypotubes are connected to respective ones of the plurality of conductor wires of the lead body.

6 . The neurostimulation system of claim 5 wherein the plurality of conductor wires are disposed in a helical configuration within the lead body.

7 . The neurostimulation system of claim 5 wherein the plurality of hypotubes extend from the stimulation tip end in respective staggered lengths.

8 . The neurostimulation system of claim 5 wherein the neurostimulation lead comprises a non-symmetric hour-glass radial marker.

Assignees

• Advanced Neuromodulation Systems Inc

Inventors

• Sefkow Ryan
• Crawford Christopher A
• Mitchell Jeffrey
• Wilson Kevin
• Bray Raymond P
• Gonzalez John R

Classifications

• B29K2075/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material · CPC title

• A61N1/0534 Primary

  Electrodes for deep brain stimulation · CPC title

• B29C45/14467

  Joining articles or parts of a single article (B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence) · CPC title

• B29C2045/14524

  making hollow articles · CPC title

• B29C45/14311

  using means for bonding the coating to the articles (B29C45/14795 takes precedence) · CPC title