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US 10,499,946 B2Granted
Atherectomy devices and methods
AssigneeCardio Flow, Inc.
InventorsPaul Joseph Robinson, Cassandra Ann Piippo Svendsen, Charles Anthony Plowe, Albert Selden Benjamin
Life of this patent
Estimating the term…
Abstract
This document describes rotational atherectomy devices and systems for removing or reducing stenotic lesions in blood vessels by rotating an abrasive element within the vessel to partially or completely remove the stenotic lesion material.
Claims31
A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
- an elongate tube defining a lumen;
- and
- a rotational atherectomy device comprising:
- an elongate flexible drive shaft comprising helically wound metallic filars that form a coil having an outer diameter, the drive shaft defining a longitudinal axis;
- an array of at least three spherical eccentric abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis, each abrasive element being spaced apart from an adjacent abrasive element by an element spacing distance;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed along the inner diameter to the helically wound metallic filars of the drive shaft, the metallic stability element having a center of mass aligned with the longitudinal axis;
- wherein the drive shaft, the spherical eccentric abrasive elements, and the metallic stability element rotate together about the longitudinal axis,
- wherein the stability element being distally spaced apart from a distal-most abrasive element of the spherical eccentric abrasive elements by a distal separation distance, and
- wherein the distal separation distance being greater than the element spacing distance.
7 more elements
A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
- an elongate tube defining a lumen;
- and
- a rotational atherectomy device comprising:
- an elongate flexible drive shaft comprising helically wound metallic filars that form a coil having an outer diameter, the drive shaft defining a longitudinal axis;
- an array of at least three spherical eccentric abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis, each abrasive elements being spaced apart from an adjacent abrasive element by an element spacing distance;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed along the inner diameter to the helically wound metallic filars of the drive shaft, the metallic stability element having a center of mass aligned with the longitudinal axis;
- wherein the drive shaft, the spherical eccentric abrasive elements, and the metallic stability element rotate together about the longitudinal axis,
- the system further comprising a second stability element fixed to the drive shaft.
6 more elements
A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
- an elongate tube defining a lumen;
- and
- a rotational atherectomy device comprising:
- an elongate flexible drive shaft comprising helically wound metallic filars that form a coil having an outer diameter, the drive shaft defining a longitudinal axis;
- an array of five spherical eccentric abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis,
- each abrasive element being spaced apart from an adjacent abrasive element by an element spacing distance;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed along the inner diameter to the helically wound metallic filars of the drive shaft, the metallic stability element having a center of mass aligned with the longitudinal axis;
- wherein the drive shaft, the spherical eccentric abrasive elements, and the metallic stability element rotate together about the longitudinal axis, and
- wherein the array comprises outer spherical eccentric abrasive elements and at least one inner spherical eccentric abrasive element, wherein an outer diameter of each of the outer spherical eccentric abrasive element is smaller than an outer diameter of the at least one inner spherical eccentric abrasive element.
7 more elements
A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
- an elongate tube defining a lumen;
- and
- a rotational atherectomy device comprising:
- an elongate flexible drive shaft comprising helically wound metallic filars that form a coil having an outer diameter, the drive shaft defining a longitudinal axis;
- an array of at least three spherical eccentric abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis, each abrasive elements being spaced apart from an adjacent abrasive element by an element spacing distance;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed along the inner diameter to the helically wound metallic filars of the drive shaft, the metallic stability element having a center of mass aligned with the longitudinal axis;
- wherein the drive shaft, the spherical eccentric abrasive elements, and the metallic stability element rotate together about the longitudinal axis, and
- wherein each spherical eccentric abrasive element of the at least three spherical eccentric abrasive elements has an abrasive outer surface, and wherein a middle spherical eccentric abrasive element of the at least three spherical eccentric abrasive elements has a larger outer diameter than a proximal spherical eccentric abrasive element of the at least three spherical eccentric abrasive elements and a larger outer diameter than a distal spherical eccentric abrasive element of the at least three spherical abrasive elements.
6 more elements
Dependencies are inferred from the claim text.