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US 10,478,215 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.
Claims28
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 eccentric spherical abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed to the helically wound metallic filars of the drive shaft the metallic stability element having a center of mass aligned with the longitudinal axis;
- and
- a distal-most extension portion that extends distally of the metallic stability element to a distal free end;
- wherein the drive shaft, the abrasive elements, and the metallic stability element rotate together about the longitudinal axis,
- wherein the distal-most extension portion extends distally of the metallic stability element for a distal extension distance,
- wherein the distal-most extension portion is distally spaced apart from a distal-most abrasive element of the eccentric spherical abrasive elements by a distal separation distance, and
- wherein the center of mass for each eccentric spherical abrasive elements in said array is offset from the longitudinal axis while contemporaneously the center of mass of the metallic stability element is aligned with the longitudinal axis, and
- wherein the distal separation distance being greater than an element spacing distance, wherein each abrasive element is spaced apart from an adjacent abrasive element by the element spacing distance.
11 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 eccentric spherical abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed to the helically wound metallic filars of the drive shaft, the metallic stability element having a center of mass aligned with the longitudinal axis;
- and
- a distal-most extension portion that extends distally of the metallic stability element to a distal free end;
- wherein the drive shaft, the abrasive elements, and the metallic stability element rotate together about the longitudinal axis,
- wherein the distal-most extension portion is configured to provide a stable rotary motion during rotation of the system.
8 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 five spherical abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed to the helically wound metallic filars of the drive shaft the metallic stability element having a center of mass aligned with the longitudinal axis;
- and
- a distal-most extension portion that extends distally of the metallic stability element to a distal free end;
- wherein the drive shaft, the abrasive elements, and the metallic stability element rotate together about the longitudinal axis,
- and
- wherein the array comprises outer spherical abrasive elements and at least one inner spherical abrasive element, wherein an outer diameter of the outer spherical abrasive element is smaller than an outer diameter of the at least one inner spherical abrasive element.
9 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 eccentric spherical abrasive elements being fixed to the drive shaft such that a center of mass of each abrasive element is offset from the longitudinal axis;
- and
- a metallic stability element having a cylindrical shape defining an inner diameter, the metallic stability element being fixed to the helically wound metallic filars of the drive shaft, the metallic stability element having a center of mass aligned with the longitudinal axis;
- and
- a distal-most extension portion that extends distally of the metallic stability element to a distal free end;
- wherein the drive shaft, the abrasive elements, and the metallic stability element rotate together about the longitudinal axis, and
- wherein each spherical abrasive element of the at least three spherical abrasive elements has an abrasive outer surface, wherein a middle spherical abrasive element of the at least three spherical abrasive elements has a larger outer diameter than a proximal-most spherical abrasive element of the at least three spherical abrasive elements and a larger outer diameter than a distal-most spherical abrasive element of the at least three spherical abrasive elements, and wherein the center of mass for each eccentric spherical abrasive elements in said array is offset from the longitudinal axis while contemporaneously the center of mass of the metallic stability element is aligned with the longitudinal axis.
8 more elements
Dependencies are inferred from the claim text.