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Multiple electrode catheter

  • US 5,562,722 A
  • Filed: 03/14/1994
  • Issued: 10/08/1996
  • Est. Priority Date: 03/14/1994
  • Status: Expired due to Term
First Claim
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1. A catheter system, comprising:

  • a helically wound multiple electrode stimulation catheter comprising,a helically wound inner member having distal and proximal ends, wherein at least the distal end is an electrically conductive material and wherein said inner member defines an inner lumen of said catheter,a first insulating layer covering less than all of said inner member, wherein the distal end of said inner member is exposed to define a first, flexible helically wound electrode, wherein said first electrode comprises a first proximal portion having closely wound helices, a second central portion having spread apart helices to define a passage for fluid communication with said lumen, and a third distal portion having closely wound helices,a second flexible electrode disposed around said first insulating layer and spaced proximally a predetermined distance from said first electrode, anda second insulating layer around said catheter beginning at the second electrode and extending to the proximal end of the inner member; and

    at least one stiffening element having a predetermined length and adapted to be inserted into the inner lumen of said catheter.

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