Patent ID: 9126016
Filing Date: 2015-09-08
Classification: A61M

Abstract:
1. A catheter apparatus comprising: a catheter body having a proximal portion, a distal portion with a distal tip, and an inner sheath substantially fitting within an outer sheath, said distal portion further having an expansile anchor mechanism directly connected with the inner sheath and outer sheath, said anchor mechanism deployable by axial movement of said inner sheath within said outer sheath when said catheter apparatus is inserted within a blood vessel, said anchor mechanism comprising a tubular mesh braid having permeable and impermeable portions arranged axially in series so as to allow the level of blood flow or reflux within the blood vessel to be regulated or throttled by advancing the outer sheath relative to the inner sheath, wherein the impermeable portion comprises an impermeable membrane placed on or within the impermeable portion while leaving the permeable portion uncovered and open to blood flow therethrough, and wherein the impermeable portion of the deployed anchor mechanism allows antegrade blood flow beyond the distal tip while limiting the blood flow to cause pressure in the blood vessel distal to the distal tip to be less than pressure in the blood vessel proximal to the distal tip.