High resolution brain stimulation lead and method of use

Details High resolution brain stimulation lead and method of use High resolution brain stimulation lead and method of use

A - Human Necessities

61

N

A61N 1/05 (2006.01)

Patent

CA 2216021

A brain stimulation lead for precise delivery of electrical stimuli to a small dense brain target, and method of positioning such lead optimally in the patient's brain, is provided. The lead has a distal end portion which is substantially tubular or cylindrical along a longitudinal axis, and has a plurality of electrodes characterized by a diagonal geometry, permitting a greater number of electrodes to be provided within a very small lineal distance, e.g. 10 mm or even 5 mm. In a preferred embodiment, three ring electrodes are positioned on the distal end portion, each at a common angle of about 45 degrees and each extending only about 180 degrees around the lead body. The ring segment electrodes are about 0.5 mm in axial length, and have a separation of about 0.5 mm. The lead also has a tip electrode with a substantially spherical distal edge, and a proximal diagonal edge having the same angle as the ring segment electrodes. The diagonal ring geometry permits fine adjustment of the electrode assembly with respect to the target by simply rotating the lead about its axis, thereby facilitating an optimal electrode placement for precise stimulation of the target.

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