Catheter having window and partial balloon covering for dissecting tissue planes and injecting treatment agent to coronary blood vessel

摘要

A method is provided including introducing a delivery device through a vessel wall to a treatment site within one of a peri-adventitial space or a pericardium adjacent a coronary blood vessel and delivering a treatment agent through the delivery device. The treatment agent is delivered through the delivery device according to conditions that hydraulically dissect tissue planes within the peri-adventitial space. A kit is provided including a delivery device having a needle to be advanced through one of an epicardium of a heart and a wall of a coronary blood vessel into a peri-adventitial space and a treatment agent comprising particles having an average diameter on the order of 15 microns or more to be delivered through the delivery device into the peri-adventitial space.

主权项

1. A method comprising:
advancing a catheter assembly within a lumen of a coronary blood vessel, the catheter assembly having a primary cannula attached at a distal end to a cylindrical housing, the cylindrical housing having a window formed through one side and a balloon formed around another side of the cylindrical housing, wherein the balloon extends around less than an entire circumference of the cylindrical housing and wherein the balloon is positioned between an outer surface of the cylindrical housing and a vessel wall of the coronary blood vessel such that when the balloon is inflated the balloon contacts a portion of the vessel wall adjacent the balloon and moves the one side of the cylindrical housing toward a portion of the vessel wall adjacent the window to press the window against the vessel wall; introducing a needle through the window to the vessel wall and into a treatment site within one of a peri-adventitial space or a pericardium adjacent the coronary blood vessel by advancing the needle through the window; delivering a first substance through the needle and out an end of the needle directly to the treatment site at a pressure sufficient to hydraulically dissect tissue planes within the peri-adventitial space or the pericardium adjacent the coronary blood vessel, wherein the first substance is delivered in an amount of at least 1.0 cc and the pressure sufficient to hydraulically dissect tissue planes is from about 30 mm Hg to about 150 mm Hg; withdrawing the first substance through the needle once the tissue planes are dissected; and delivering a second substance comprising a treatment agent through the needle and into the dissected tissue planes, and wherein an amount of the second substance is less than the amount of the first substance.