Medical devices with layered conductive elements and methods for manufacturing the same

1. A medical device for performing a diagnostic or therapeutic procedure within a subject, comprising:

an elongate body comprising an outer elongate member comprising a polymeric material and having an outer surface, a proximal end, a distal end, and a lumen surrounded by a circumferential wall, the elongate body further comprising an inner elongate member extending within the lumen of the outer elongate member and having a proximal end, a distal end, and lumen surrounded by a circumferential wall, wherein the elongate body comprises a distal end configured to be inserted into a lumen or duct of the subject;

first and second electrically-conductive tracings carried on the outer surface of the outer elongate member, the first electrically-conductive tracing electrically isolated from the second electrically-conductive tracing;

first, second, and third elongate lumens extending longitudinally within the circumferential wall of the outer elongate member, the first, second, and third elongate lumens generally form a circumferential array;

a first conductive wire extending substantially longitudinally within the first elongate lumen and configured to carry a first signal;

a second conductive wire extending substantially longitudinally within the second elongate lumen and configured to carry a second signal;

a third conductive wire extending substantially longitudinally within the third elongate lumen and configured to carry a third signal;

wherein the first, second, and third conductive wires are located in a first sector of the circumferential wall of the outer elongate member, and wherein a second sector of the circumferential wall of the outer elongate member does not have any elongate conductive wires, such that the circumferential array of the first, second, and third elongate conductive wires is unevenly distributed around outer elongate member.

2. The medical device of claim 1 , wherein the uneven distribution causes a circumferential space at the second sector that is about 5° to about 180° of the elongate body.

3. The medical device of claim 1 , wherein the uneven distribution causes a circumferential space at the second sector that is about 15° to about 120° of the elongate body.

4. The medical device of claim 1 , wherein the uneven distribution causes a circumferential space at the second sector that is about 30° to about 90° of the elongate body.

5. The medical device of claim 1 , wherein at least a one of the first and second electrically-conductive tracings comprises an electrode.

6. The medical device of claim 1 , wherein at least one of the first and second electrically conductive tracings comprises an elongate tracing extending substantially longitudinally along the outer surface of the outer elongate member.

7. The medical device of claim 6 , wherein at least one of the first and second electrically-conductive tracings comprises an electrode.

8. The medical device of claim 7 , wherein the electrode is electrically coupled to the at least one of the first and second electrically-conductive tracings.

9. The medical device of claim 7 , wherein the electrode is electrically coupled to at least one of the first, second, and third conductive wires.

10. The medical device of claim 1 , further comprising an orifice passing through the circumferential wall of the outer elongate member at the second sector.

11. The medical device of claim 10 , wherein the orifice passes through the circumferential wall of the inner elongate member at the second sector.

12. The medical device of claim 1 , wherein the first, second, and third elongate lumens are located in the first sector of the circumferential wall of the outer elongate member, and wherein the second sector of the circumferential wall of the outer elongate member does not have any elongate lumens.

13. The medical device of claim 12 , wherein the second sector of the circumferential wall of the outer elongate member does not have any conductive wires.

14. The medical device of claim 1 , wherein the first electrically conductive tracing comprises a first electrode and the second electrically conductive tracing comprises a second electrode, and wherein first and second electrodes are configured to measure a bio-impedance within the lumen or duct of the subject.

15. The medical device of claim 1 , wherein the first and second electrically-conductive tracings each comprise an ink selected from the list consisting of: silver ink, carbon ink, silver-silver chloride ink, and silver-carbon silver chloride ink.

16. The medical device of claim 1 , wherein the first and second electrically-conductive tracings each comprise radiopaque ink.

17. The medical device of claim 1 , wherein the first, second, and third conductive wires each have a diameter of between about 0.004 inch and about 0.012 inch.

18. The medical device of claim 1 , wherein each one of the first and second electrically conductive tracings comprises an elongate tracing extending substantially longitudinally along the outer surface of the outer elongate member from the proximal end of the outer elongate member to the distal end of the outer elongate member.

19. The medical device of claim 1 , further comprising:

an elongate lumen extending longitudinally within the circumferential wall of the inner elongate member; and

a conductive wire extending substantially longitudinally within the elongate lumen of the inner elongate member and configured to carry a first signal.

20. The medical device of claim 1 , wherein the elongate body has a circular outer cross-section.