Catheter and electrode systems for electrical neuromodulation
Embodiments of the present disclosure provide for catheters for use in electrical neuromodulation. The catheter of the present disclosure includes an elongate body having a first end and a second end. The elongate body includes a longitudinal center axis that extends between the first end and the second end. The elongate body further includes three or more surfaces that define a convex polygonal cross-sectional shape taken perpendicularly to the longitudinal center axis. The catheter further includes one or more electrodes on one surface of the three or more surfaces of the elongate body, where conductive elements extend through the elongate body. The conductive elements can conduct electrical current to combinations of the one or more electrodes.
1. A catheter for use in electrical neuromodulation, the catheter comprising:
an elongate body having a proximal end and a distal end;
a first opening in the elongate body;
a second opening in the elongate body, the second opening between the proximal end of the elongate body and the distal end of the elongate body and on a first side of the elongate body;
a deflection lumen extending between the first opening and the second opening;
an elongate deflection member having a first end and a second end,
the deflection lumen having a size configured to allow the deflection member to pass through the deflection lumen,
the elongate deflection member configured to extend out of the second opening with the first end of the elongate deflection member proximal to the proximal end of the elongate body upon application of pressure to the first end of the elongate deflection member towards the first opening,
the elongate deflection member comprising a support wire comprising an austenitic metal alloy,
the support wire configured to provide column strength and a predefined shape to the elongate deflection member upon laterally extending out of the second opening; and
a plurality of electrodes on a second side of the elongate body, the second side opposite the first side, wherein extension of the elongate deflection member out of the second opening is laterally away from the plurality of electrodes and is configured to bring the plurality of electrodes into contact with a luminal surface of a pulmonary artery.
2. The catheter of claim 1 , wherein the support wire comprises a coil shape extending longitudinally along a length of the elongate body, the coil shape configured to transfer longitudinal force applied to the first end of the elongate deflection member through the elongate body so as to laterally extend the second end of the elongate deflection member out of the second opening.
3. The catheter of claim 1 , wherein the elongate deflection member comprises a flexible polymeric material, and wherein the support wire is encased in the flexible polymeric material.
4. The catheter of claim 3 , wherein the flexible polymeric material comprises medical grade polyurethane, polyester-based polyurethane, polyether-based polyurethane, polycarbonate-based polyurethane, polyamide, polyamide block copolymer, polyolefin, polyethylene, high density polyethylene, or polyamide.
5. The catheter of claim 1 , wherein the elongate body comprises a guidewire lumen, wherein the support wire comprises austenitic 316 stainless steel or nickel titanium alloy, and wherein the support wire is encased in a flexible polymeric material.
6. A catheter for use in electrical neuromodulation, the catheter comprising:
an elongate body having a proximal end and a distal end;
a first opening in the elongate body;
a second opening in the elongate body, the second opening between the proximal end of the elongate body and the distal end of the elongate body and on a first side of the elongate body;
a deflection lumen extending between the first opening and the second opening;
an elongate deflection member having a first end and a second end, the elongate deflection member configured to extend out of the second opening upon application of pressure to the first end of the elongate deflection member; and
a plurality of electrodes on a second side of the elongate body, the second side opposite the first side, wherein extension of the elongate deflection member out of the second opening is laterally away from the plurality of electrodes and is configured to bring the plurality of electrodes into contact with a luminal surface.
7. The catheter of claim 6 , wherein the elongate deflection member comprises a support wire configured to provide column strength to the elongate deflection member.
8. The catheter of claim 6 , wherein the elongate deflection member comprises a support wire comprising austenitic 316 stainless steel or nickel titanium alloy.
9. The catheter of claim 6 , wherein the elongate deflection member comprises a support wire configured to provide a predefined shape to the elongate deflection member upon laterally extending out of the second opening.
10. The catheter of claim 6 , wherein the elongate deflection member comprises a support wire comprising a coil shape extending longitudinally along a length of the elongate body, and wherein the coil shape is configured to transfer longitudinal force applied to the first end of the elongate deflection member through the elongate body so as to laterally extend the second end of the elongate deflection member out of the second opening.
11. The catheter of claim 6 , wherein the elongate deflection member comprises a flexible polymeric material.
12. The catheter of claim 11 , wherein the elongate body comprises a guidewire lumen, wherein the elongate deflection member comprises a support wire and a flexible polymeric material, wherein the support wire comprises austenitic 316 stainless steel or nickel titanium alloy, and wherein the support wire is encased in the flexible polymeric material.
13. A catheter for use in electrical neuromodulation, the catheter comprising:
an elongate body having a proximal end and a distal end;
a first opening in the elongate body;
a second opening in the elongate body, the second opening between the proximal end of the elongate body and the distal end of the elongate body;
a deflection lumen extending between the first opening and the second opening;
an elongate deflection member having a first end and a second end, the elongate deflection member configured to extend out of the second opening; and
a plurality of electrodes, wherein extension of the elongate deflection member out of the second opening is laterally away from the plurality of electrodes and is configured to bring the plurality of electrodes into contact with a luminal surface.
14. The catheter of claim 13 , wherein the elongate deflection member comprises a support wire configured to provide column strength to the elongate deflection member.
15. The catheter of claim 13 , wherein the elongate deflection member comprises a support wire comprising austenitic 316 stainless steel or nickel titanium alloy.
16. The catheter of claim 13 , wherein the elongate deflection member comprises a support wire configured to provide a predefined shape to the elongate deflection member upon laterally extending out of the second opening.
17. The catheter of claim 13 , wherein the elongate deflection member comprises a support wire comprising a shape configured to transfer longitudinal force applied to the first end of the elongate deflection member through the elongate body so as to laterally extend the second end of the elongate deflection member out of the second opening.
18. The catheter of claim 17 , wherein the shape comprises a coil shape.
19. The catheter of claim 13 , wherein the elongate deflection member comprises a flexible polymeric material.
20. The catheter of claim 13 , wherein the elongate body comprises a guidewire lumen, wherein the elongate deflection member comprises a support wire and a flexible polymeric material, wherein the support wire comprises austenitic 316 stainless steel or nickel titanium alloy, and wherein the support wire is encased in the flexible polymeric material.