Renal denervation catheter with RF electrode and integral contrast dye injection arrangement

摘要

A catheter includes a flexible braided shaft having a length sufficient to access a target vessel of the body, such as a renal artery. An electrode at the catheter's distal tip is configured to ablate extravascular target tissue, such as perivascular renal nerve tissue. An electrical conductor coupled to the electrode extends along a first lumen of the shaft. A second lumen of the shaft terminates at a port arrangement on an outer surface of the shaft near the electrode. The second lumen transports a contrast media from the catheter's proximal end and through the port arrangement. The catheter may include a steering arrangement and a lubricious coating on an outer surface of the shaft, allowing a clinician to navigate the catheter through vasculature and into the target vessel without use of a separate delivery sheath or guiding catheter.

主权项

1. An apparatus, comprising:
a catheter comprising a flexible braided shaft having a proximal end, a distal end, a length, and a lumen arrangement including first and second lumens extending between the proximal and distal ends, the length of the braided shaft sufficient to access a renal artery of a patient relative to a percutaneous access location; an electrode provided at a distal tip of the catheter and configured to deliver electrical energy sufficient to ablate perivascular renal nerve tissue from within the renal artery; wherein the electrode includes a central void in fluid communication with the second lumen; and an electrical conductor coupled to the electrode and extending along the first lumen; the second lumen terminating at one or more ports at an outer surface of the braided shaft proximate the electrode, the second lumen configured to transport a contrast media from the proximal end of the catheter and through the one or more ports.