Intra-aortic renal delivery catheter
First Claim
1. A method for providing localized medical care to a renal system in a patient, comprising:
- positioning a distal end portion of a catheter at a location within the patient'"'"'s aorta that is adjacent to an ostium of at least one renal artery extending from the aorta;
using the distal end portion of the catheter from within the aorta at the location, directing a volume of fluid within the aorta to be locally delivered primarily into the at least one renal artery via its ostium;
while locally delivering the volume of fluid into the at least one renal artery, allowing a substantial volume of aortic blood to flow downstream past the location and into the patient'"'"'s downstream circulation downstream from the renal artery ostium;
substantially isolating the volume of fluid being directed into the at least one renal artery from mixing with the substantial volume of aortic blood flowing downstream from the location; and
conducting an interventional medical procedure at least in part with a guide or diagnostic catheter at an upstream location upstream from the location while locally directing the volume of fluid into the at least one renal artery, and while allowing the substantial volume of aortic blood to flow downstream from the ostium, and also while substantially isolating the volume of fluid from mixing with the substantial volume of aortic blood flowing downstream.
8 Assignments
0 Petitions
Accused Products
Abstract
A renal flow system and method direct fluid into renal arteries from a location within the aorta. A renal flow assembly has a tapered tube that is adjustable between a radially collapsed condition for delivery to the location through a delivery sheath and a radially expanded condition that divides aortic flow into exterior and interior paths. The tube'"'"'s wall is made from a sheet of flexible material, such as PTFE or ePTFE. Two, nickel-titanium rings radially support the tube'"'"'s ends and are connected by a longitudinal spine support. A fluid delivery assembly injects drug to flow along the exterior flow path and the tubular wall directs the agent into the renal artery ostium. The tube'"'"'s taper has localized shape for circumferential agent mixing to infuse both kidneys'"'"' renals. The flow assembly allows an interventional device, e.g. delivery catheter, to advance across the location while directing blood into the renals and perfusing downstream circulation. The renal flow assembly and distal device are used within a common guide sheath through a single puncture wound. Vasodilators, antioxidants, or diuretics are delivered to the kidneys to treat/prevent RCN, CHF, or ARF.
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Citations
32 Claims
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1. A method for providing localized medical care to a renal system in a patient, comprising:
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positioning a distal end portion of a catheter at a location within the patient'"'"'s aorta that is adjacent to an ostium of at least one renal artery extending from the aorta; using the distal end portion of the catheter from within the aorta at the location, directing a volume of fluid within the aorta to be locally delivered primarily into the at least one renal artery via its ostium; while locally delivering the volume of fluid into the at least one renal artery, allowing a substantial volume of aortic blood to flow downstream past the location and into the patient'"'"'s downstream circulation downstream from the renal artery ostium; substantially isolating the volume of fluid being directed into the at least one renal artery from mixing with the substantial volume of aortic blood flowing downstream from the location; and conducting an interventional medical procedure at least in part with a guide or diagnostic catheter at an upstream location upstream from the location while locally directing the volume of fluid into the at least one renal artery, and while allowing the substantial volume of aortic blood to flow downstream from the ostium, and also while substantially isolating the volume of fluid from mixing with the substantial volume of aortic blood flowing downstream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for directing fluid to a renal system in a patient, comprising:
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positioning a renal device at a location within the patient'"'"'s aorta that is adjacent to an ostium of at least one renal artery extending from the aorta; dividing a first portion of aortic flow and a second portion of aortic flow from an aortic blood flow within the aorta with the renal device; directing the first portion of aortic blood flow into the at least one renal artery, while allowing the second portion to flow across the location and downstream of the ostium; locally delivering a volume of fluid comprising a diagnostic, prophylactic or therapeutic agent the to at least one renal artery in the patient with the renal device; and while locally delivering the volume of fluid to the at least one renal artery with the renal device, positioning a medical device within an aorta of the patient upstream from an ostium of the at least one renal artery along the aorta of the patient. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification