US 9,750,525 B2Granted

Devices, systems and methods for an oscillating crown drive for rotational atherectomy

AssigneeCardiovascular Systems, Inc.

InventorJoseph Peter Higgins

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Abstract

The present invention is directed in various methods, devices and systems relating to rotational atherectomy. More specifically, an oscillating driver is connected to a drive shaft, or torque transfer tube, with abrasive element mounted thereon. The result provides a rotational working diameter for the rotating abrasive element that is larger than its resting diameter. Generally, the preferred abrasive element is concentric in profile and/or with center of mass collinear with the drive shaft's rotational axis. However, eccentric abrasive elements, both in terms of offsetting center of mass and/or geometric eccentricity may also be employed.

Claims10

Dependent claims

A rotational atherectomy system adapted for high-speed rotation and having an abrasive head adapted to move from a resting diameter when there is no system rotation to a working diameter greater than the resting diameter during high-speed rotation of the system, comprising:

an elongated flexible non-oscillating drive shaft having a lumen therethrough, a rotational axis and a distal end;
and
an oscillating section attached proximate the distal end of the elongated non-oscillating drive shaft and comprising:
a radially offsetting drive shaft attachment attached to the non-oscillating drive shaft and having a centered lumen therethrough, the centered lumen in fluid communication with the lumen of the non-oscillating drive shaft and further being coincident with the rotational axis of the non-oscillating drive shaft, and an attachment point radially offset from the centered lumen, and
a flexible oscillating drive shaft directly attached to the attachment point of the radially offsetting drive shaft attachment and extending distally and longitudinally therefrom;
and
the abrading head attached to the flexible oscillating drive shaft and spaced distally from the attachment point.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/208,585Filed 13 Mar 2014 · us provisional application
Priority: 14 Mar 2013
Published: US 2014/0316450 A123 Oct 2014
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61B 17/320758
Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions: with a rotating cutting…
A61B 2017/320004
Surgical cutting instruments: abrasive
A61B 2017/320028
With continuously rotating, oscillating or reciprocating cutting instruments: with reciprocating movements
A61B 2017/320733
Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions: with a flexible cutting or…

Family

Application61/782,184Us provisional application · filed 14 Mar 2013
US 2014/0316450 A1Pre-grant publication · published 23 Oct 2014
US 9,750,525 B2This patent

From the US filing history. Foreign family members aren’t listed.

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