Intravascular miniature stent pump
AssigneeCalifornia Institute of Technology
InventorsMorteza Gharib, Anna Iwaniec, Richmond A. Wolf
Life of this patent
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Abstract
An intravascular miniature stent pump comprising an intravascular stent for implantation at an implant site within a blood vessel and a miniature pump mounted on the stent, wherein the pump allows an adequate blood flow to prevent clotting within a lumen of the stent, and wherein the blood flow is equal to or greater than a blood flow at the implant site before implantation.
Claims43
An intravascular stent pump, comprising:
- an intravascular stent for implantation at an implant site within a blood vessel wherein the intravascular stent comprises a one-way valve;
- a pump mounted on said stent, wherein said pump assists with flow of blood within said blood vessel, said pump having a rotating part that contacts said blood within said blood vessel, and said rotating part being bladeless and having no grooves thereon, said rotating part being a cylinder with a cylindrical outer surface, and where the cylinder extends axially along a straight central axis and where said cylinder rotates around said axis during pumping, and wherein said cylinder has no grooves thereon and has no blades thereon and where the cylindrical surface contacts said blood to pump the blood;
- and
- a balloon wrap, coupled to said stent and expandable by injection of fluid into a cavity thereof to fill said blood vessel.
A method for pumping fluid in a vessel of a human body, comprising:
- a) positioning an endoluminal stent pump at a desired site of the vessel, wherein said stent pump comprises a stent and a pump mounted on said stent;
- and
- b) pumping fluid using a cylinder that extends along a straight line central axis, having a cylindrical outer surface which has no blades thereon and has no grooves thereon, said pumping comprising rotating said cylindrical outer surface around said straight line central axis, and where the cylindrical surface with no blades thereon and no grooves thereon contacts the fluid to pump the fluid.
An intravascular miniature stent pump system for a blood vessel which carries blood, comprising:
- an intravascular stent;
- a bladeless pump mounted on said stent, the bladeless pump comprising an inner cylindrical element, which is rotatably mounted to rotate around a rotation axis, and where said inner cylindrical element has a substantially smooth outer surface which is substantially constant and where said cylindrical element extends along a straight line, and where said substantially smooth outer surface has a constant outer diameter cylindrical surface over an area of pumping and has no blades thereon and no grooves thereon in said area of pumping, and where said rotation axis is a central axis of said inner cylindrical element and where the substantially smooth outer surface of said inner cylindrical element contacts said blood and pumps said blood by contacting said blood;
- and
- a chamber surface, wherein said chamber surface surrounds said inner element and has an inlet of fluid, at a first location along said rotation axis and an outlet for transmitting pumped fluid, at a different location along said rotation axis.
An intravascular miniature stent pump system for a blood vessel with blood therein, said pump, comprising:
- an intravascular stent;
- and
- a bladeless pump mounted on said stent, said bladeless pump comprising a rotating constant diameter cylinder that extends along a straight line, which has no blades thereon and has no grooves thereon and wherein said constant diameter cylinder rotates around a central axis of the cylinder to produce a fluid flow in a direction substantially perpendicular to a direction of rotation using only non bladed and non-grooved smooth outer surfaces for pumping, where an outer surface of the constant diameter cylinder is a smooth cylindrical surface and where said outer surface of said smooth cylindrical surface contacts the blood to be pumped to pump said blood by contacting said blood.
Dependencies are inferred from the claim text.