초록 ▼

An implantable lead is provided with at least one extendable member to position therapy delivery elements, which may be electrodes or drug delivery ports, after the lead has been inserted into the body. The lead may be formed as a resilient element which is contained in a retainer tube that may be r

An implantable lead is provided with at least one extendable member to position therapy delivery elements, which may be electrodes or drug delivery ports, after the lead has been inserted into the body. The lead may be formed as a resilient element which is contained in a retainer tube that may be removed to permit the lead to deploy. Alternatively, a non-resilient lead may be provided with a slotted retainer tube. A series of mechanical linkages for expanding and retracting the lead within the human body may be actuated with various mechanisms. A control system may be provided for closed-loop feedback control of the position of the extendable members. The invention also includes a method for expanding an implantable lead in situ.

대표청구항 ▼

[ What is claimed is:] [1.] An implantable lead system for providing therapy to a body comprising:an elongate central portion;at least one extendable member having an end, the extendable member depending from the central portion and being adapted to assume a compact position, wherein the end is disp

[ What is claimed is:] [1.] An implantable lead system for providing therapy to a body comprising:an elongate central portion;at least one extendable member having an end, the extendable member depending from the central portion and being adapted to assume a compact position, wherein the end is disposed in close proximity to the central portion and an extended position, wherein the end is disposed at a location distal from the central portion;at least one therapy delivery element disposed on the extendable member for delivering stimulation to the body;an actuating assembly for permitting adjustment of the position of the extendable member in situ;a sensor for sensing an effect of stimulation provided by the therapy delivery element; anda closed-loop feedback controller for operating the actuating assembly to restore the effect of stimulation provided by the therapy delivery element to a predetermined value.