Patent ID: 7993325
Filing Date: 2011-08-09
Classification: A61M

Abstract:
1. A method for positioning a delivery catheter in the renal arteries, the method comprising: positioning an introducer sheath in an iliac artery; advancing a renal delivery catheter having a distal bifurcation through the introducer sheath; constraining the distal bifurcation in a low-profile configuration with a constraint assembly while advancing the distal bifurcation and the constraint assembly through the introducer sheath; advancing the constrained distal bifurcation and the constraint assembly from the introducer sheath toward the renal arteries while the bifurcation remains constrained by the constraint assembly, such that the distal bifurcation and the constraint assembly move relative to the introducer sheath; releasing the distal bifurcation from the constrained low-profile configuration to allow entry of a first distal extension of the distal bifurcation into one of the renal arteries and a second distal extension of the distal bifurcation into the other renal artery, wherein the first distal extension comprises a first lumen and a first distal aperture, and the second distal extension comprises a second lumen and a second distal aperture; and delivering a fluid agent through the first and second distal extension lumens and the first and second distal apertures, respectively, such that the fluid agent flows into blood flowing within the renal arteries and feeds downstream into the kidneys via the renal arteries.