Electrodes and electrode positioning systems for transvascular neuromodulation
Electrode systems for transvascular stimulation of target nerves include electrode arrays, elements promoting blood flow between electrode surfaces and surrounding vascular walls, electrodes shaped to promote more even current density than electrodes having angular edges, features for retaining the electrode systems with blood vessels, and features for using electrode-carrying elements to asymmetrically distend blood vessel walls towards target nerve structures.
1. An electrode system for transvascular stimulation of nerve targets, comprising:
an electrode support including a plurality of longitudinally extending struts, said electrode support expandable within a blood vessel to position said struts in contact with an interior wall of the blood vessel;
electrodes carried on at least one of the struts;
wherein the electrode support has a deployed position within a blood vessel wherein at least one of the struts extends further from a longitudinal axis of the electrode support, in a radial direction, than the other struts in the plurality of struts so as to asymmetrically deform the blood vessel wall so that the portion of the blood vessel wall contacting said at least one strut distends towards the nerve target, wherein said at least one strut possesses greater strength in a radial direction relative to a longitudinal axis of the electrode support than the other struts in the plurality of struts.
2. An electrode system for transvascular stimulation of nerve targets, comprising:
an electrode support including a plurality of longitudinally extending struts, said electrode support expandable within a blood vessel to position said struts in contact with an interior wall of the blood vessel;
electrodes carried on at least one of the struts;
wherein the electrode support has a deployed position within a blood vessel wherein at least one of the struts extends further from a longitudinal axis of the electrode support, in a radial direction, than the other struts in the plurality of struts so as to asymmetrically deform the blood vessel wall so that the portion of the blood vessel wall contacting said at least one strut distends towards the nerve target, wherein said at least one strut is actively moveable in a radially outward direction independently of the other struts so as to distend said portion of the blood vessel towards the nerve target.
3. The electrode system of claim 2 , wherein said at least one strut includes a control wire or rod having a first end extending to the proximal end of the catheter, said control wire or rod manually moveable to move said at least one strut in the radially outward direction.