Systems and methods of implanting a lead for brain stimulation
First Claim
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1. A method of introducing a brain stimulating lead into a patient'"'"'s brain composing:
- holding a first cannula in a substantially fixed position completely external to the brain;
slidably supporting a second cannula with the first cannula;
positioning the second cannula with a proximal end extending beyond the proximal end of the first cannula and a distal end extending beyond the distal end of the first cannula and so that the second cannula extends at least partially into the patient'"'"'s brain;
inserting the brain stimulating lead through the second cannula;
using the second cannula as a macroelectrode, wherein the macroelectrode is attached to the second cannula;
using a stereotactic frame to hold the first cannula in a substantially fixed position; and
pulling the second cannula away from the patient'"'"'s brain, wherein the second cannula includes at least two splittable sections having a perforated interface.
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Abstract
Leads and introduction tools are proposed for deep brain stimulation and other applications. Some embodiments of the present invention provide lead designs with which may be placed with a stylet, while others do not require a stylet. Some lead embodiments use standard wire conductors, while others use cable conductors. Several embodiments incorporate microelectrodes and/or microelectrode assemblies. Certain embodiments of the present invention provide introduction tools, such as cannula and/or cannula systems, which ensure proper placement of, e.g., leads.
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Citations
10 Claims
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1. A method of introducing a brain stimulating lead into a patient'"'"'s brain composing:
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holding a first cannula in a substantially fixed position completely external to the brain; slidably supporting a second cannula with the first cannula; positioning the second cannula with a proximal end extending beyond the proximal end of the first cannula and a distal end extending beyond the distal end of the first cannula and so that the second cannula extends at least partially into the patient'"'"'s brain; inserting the brain stimulating lead through the second cannula; using the second cannula as a macroelectrode, wherein the macroelectrode is attached to the second cannula; using a stereotactic frame to hold the first cannula in a substantially fixed position; and pulling the second cannula away from the patient'"'"'s brain, wherein the second cannula includes at least two splittable sections having a perforated interface. - View Dependent Claims (2)
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3. A lead introduction system for introducing a stimulation lead into a patient'"'"'s brain, the system comprising:
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a stereotactic frame; a first cannula dimensioned to be larger than a predetermined hole size in the patient'"'"'s skull to prevent entry into the brain and which first cannula is held in a substantially fixed position by the stereotactic frame; and a second cannula slidable within the first cannula and having a proximal end extending beyond the proximal end of the first cannula and a distal end extending beyond the distal end of the first cannula and into the patient'"'"'s brain, wherein the second cannula is dimensioned to permit insertion through the predetermined hole size in the patient'"'"'s skull; wherein the second cannula is supported by the first cannula; wherein the stimulation lead is insertable through the second cannula; wherein the second cannula includes a perforated interface from the proximal end toward the distal end; and wherein the second cannula includes a macroelectrode attached to the second cannula. - View Dependent Claims (4, 5)
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6. A lead introduction system for introducing a stimulation lead into a patient'"'"'s brain, the system comprising:
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a stereotactic frame; a first cannula dimensioned to be larger than a predetermined hole size in the patient'"'"'s skull to prevent entry into the brain and which first cannula is held in a substantially fixed position by the stereotactic frame; and a second cannula slidable within the first cannula and having a proximal end extending beyond the proximal end of the first cannula and a distal end extending beyond the distal end of the first cannula and into the patient'"'"'s brain, wherein the second cannula is dimensioned to permit insertion through the predetermined hole size in the patient'"'"'s skull; wherein the second cannula is supported by the first cannula; wherein the stimulation lead is insertable through the second cannula; and wherein the second cannula includes at least two sections with a splittable mating wall configuration. - View Dependent Claims (7, 8, 9, 10)
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Specification