Electrical tissue stimulation apparatus and method
First Claim
1. An implantable lead for stimulation of nerve tissue, muscle or organs, the lead comprising:
- an elongate lead body having an axis and a tip; and
at least one extendable member having a distal portion adapted to curl upon itself when not-constrained and a proximal portion, the extendable member received at least in part within the lead body for axial movement between;
a retracted position in which the distal and proximal portions are constrained within the lead body; and
an extended position in which the proximal portion is retained within the lead body and the distal portion is deployed out the tip of the lead body such that the distal portion curls upon itself.
1 Assignment
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Accused Products
Abstract
An implantable lead for electrical stimulation of tissue has wire-like extendable members whose tips curl back upon themselves in open tissue spaces to form 2- or 3-dimensional electrodes. The electrodes may be positioned axially or in other directions from the lead body. Traction on the lead body or extendable members allows easy withdrawal as the member tip electrodes uncurl, allowing removal without major surgery. This apparatus and method is useful for minimally invasive insertion of electrodes or electrode arrays, especially through a narrow body lumen or Tuohy needle, providing therapeutic stimulation of nervous tissue, muscle or organs.
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Citations
47 Claims
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1. An implantable lead for stimulation of nerve tissue, muscle or organs, the lead comprising:
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an elongate lead body having an axis and a tip; and
at least one extendable member having a distal portion adapted to curl upon itself when not-constrained and a proximal portion, the extendable member received at least in part within the lead body for axial movement between;
a retracted position in which the distal and proximal portions are constrained within the lead body; and
an extended position in which the proximal portion is retained within the lead body and the distal portion is deployed out the tip of the lead body such that the distal portion curls upon itself. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of implanting an implantable lead into a patient comprising:
providing an implantable lead having;
an elongate lead body having an axis and a tip; and
at least one extendable member having a distal portion adapted to curl upon itself when not-constrained and a proximal portion, the extendable member received at least in part within the lead body for axial movement between;
a retracted position in which the distal and proximal portions are constrained within the lead body and an extended position in which proximal portion is retained within the lead body and the distal portion is deployed out the tip of the lead body such that the distal portion curls upon itself;
inserting the implantable lead into a desired location within a patient'"'"'s body; and
extending the distal tip portion of the extendable member out the tip of the lead body to allow the distal tip portion to curl upon itself to form an electrode. - View Dependent Claims (30, 31, 32, 33)
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34. A method of implanting an implantable lead for spinal cord or sacral nerve stimulation, the method comprising:
providing an implantable lead having;
an elongate lead body having an axis and a tip; and
at least one extendable member having a distal portion adapted to curl upon itself when not-constrained and a proximal portion, the extendable member received at least in part within the lead body for axial movement between;
a retracted position in which the distal and proximal portions are constrained within the lead body and an extended position in which proximal portion is retained within the lead body and the distal portion is deployed out the tip of the lead body such that the distal portion curls upon itself;
inserting the implantable lead adjacent a foramen or bony canal; and
extending the distal portion of the extendable member out the tip of the lead body to advance the distal portion through the foramen and to allow the distal portion to curl upon itself to form an electrode on other side of the foramen from the lead body. - View Dependent Claims (35, 36, 37)
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38. A method of implanting an implantable lead, the method comprising:
providing an implantable lead having;
an elongate lead body having an axis and a tip; and
at least one extendable member having a distal portion adapted to curl upon itself when not-constrained and a proximal portion, the extendable member received at least in part within the lead body for axial movement between;
a retracted position in which the distal and proximal portions are constrained within the lead body and an extended position in which proximal portion is retained within the lead body and the distal portion is deployed out the tip of the lead body such that the distal portion curls upon itself;
inserting the implantable lead adjacent a narrow lumen with a space on the distal end of the lumen having a greater cross sectional area than the lumen; and
extending the distal portion of the extendable member out the tip of the lead body to advance the distal portion through the lumen and to allow the distal portion to curl upon itself to form an electrode within the space. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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45. An implantable lead for electrical communication with an implantable medical device, the lead comprising:
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an elongate lead body having an axis and a tip; and
at least one extendable member having a distal portion adapted to curl upon itself when not constrained to form an electrode, a proximal portion adapted to be in electrical communication with the implantable medical device, and an intermediate portion between the distal and proximal portions providing electrical communication between the distal and proximal portions, the extendable member received at least in part within the lead body for axial movement between;
a retracted position in which the distal, intermediate and proximal portions are constrained within the lead body; and
an extended position in which the proximal portion is retained within the lead body and the intermediate and distal portions are deployed out the tip of the lead body such that the distal portion curls upon itself. - View Dependent Claims (46)
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47. An implantable lead comprising:
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an elongate lead body having a tip; and
at least one extendable member having an electrically conductive distal portion and being movably retained on the lead body to retract or deploy the distal portion beyond the tip of the lead body, the distal portion being adapted to curl upon itself when extended beyond the tip of the lead body.
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Specification