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US 10,478,217 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
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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 rotational atherectomy device for removing stenotic lesion material from a blood vessel of a patient the 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 two 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;
- and
- a metallic stability element having a cylindrical shape and a center of mass aligned with the longitudinal axis;
- and
- wherein the drive shaft, the abrasive elements, and the metallic stability element rotate together about the longitudinal axis,
- wherein the metallic stability element being distally spaced apart from a distal-most abrasive element of the spherical eccentric abrasive elements by a distal separation distance,
- wherein each abrasive element is spaced apart from an adjacent abrasive element by an element spacing distance, and wherein the center of mass for each eccentric spherical abrasive element 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 the element spacing distance.
6 more elements
A rotational atherectomy device for removing stenotic lesion material from a blood vessel of a patient the 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;
- and
- a metallic stability element having a cylindrical shape and a center of mass aligned with the longitudinal axis;
- and
- wherein the drive shaft, the 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, 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 element 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.
5 more elements
A rotational atherectomy device for removing stenotic lesion material from a blood vessel of a patient the 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 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;
- and
- a metallic stability element having a cylindrical shape and a center of mass aligned with the longitudinal axis;
- and
- 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 eccentric abrasive elements and at least one inner spherical eccentric abrasive element, wherein an outer diameter of each of the outer spherical eccentric abrasive elements is smaller than an outer diameter of the at least one inner spherical eccentric abrasive element.
5 more elements
Dependencies are inferred from the claim text.