Rotational atherectomy device with distal protection capability and method of use
First Claim
1. A rotational atherectomy device for removing a stenotic lesion from within a vessel of a patient, the device comprising a rotatable, flexible, hollow fluid impermeable drive shaft having a longitudinal axis of rotation and an eccentric abrasive element mounted on a region of the drive shaft proximal to and spaced away from its distal end, wherein the abrasive element is mounted in a fixed position relative to the drive shaft, wherein the drive shaft also includes two fluid inflatable counterweights comprising a distal fluid inflatable counterweight located at a distal end of the drive shaft and spaced away from the abrasive element and a proximal fluid inflatable counterweight located proximal to and spaced away from the abrasive element, wherein the distal and proximal fluid inflatable counterweights are equally spaced from the abrasive element.
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Accused Products
Abstract
A rotational device for removing a stenotic lesion from within a vessel of a patient is disclosed. The device comprises a flexible hollow drive shaft having a distal end insertable into the vessel and an abrasive element located on the drive shaft proximal to the distal end of the drive shaft to abrade a stenotic lesion when the drive shaft rotates. The hollow drive shaft defines a lumen for fluid supplied into the drive shaft to flow in an antegrade direction along the lumen and into the vessel from the drive shaft distal to the abrasive element so that the fluid entering the vessel flows in a retrograde direction over the abrasive element and the drive shaft to entrain debris abraded by the abrasive element for removal of said debris from the patient.
70 Citations
20 Claims
- 1. A rotational atherectomy device for removing a stenotic lesion from within a vessel of a patient, the device comprising a rotatable, flexible, hollow fluid impermeable drive shaft having a longitudinal axis of rotation and an eccentric abrasive element mounted on a region of the drive shaft proximal to and spaced away from its distal end, wherein the abrasive element is mounted in a fixed position relative to the drive shaft, wherein the drive shaft also includes two fluid inflatable counterweights comprising a distal fluid inflatable counterweight located at a distal end of the drive shaft and spaced away from the abrasive element and a proximal fluid inflatable counterweight located proximal to and spaced away from the abrasive element, wherein the distal and proximal fluid inflatable counterweights are equally spaced from the abrasive element.
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12. A rotational atherectomy device for removing a stenotic lesion from within a vessel of a patient, the device comprising:
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a rotatable, flexible, hollow fluid impermeable drive shaft formed from at least one helically coiled wire and the fluid impermeable layer which prevents flow of fluid out from a lumen of the drive shaft between adjacent turns of said helically coiled wire, the drive shaft having a longitudinal axis of rotation; an eccentric abrasive element mounted on a region of the drive shaft proximal to and spaced away from its distal end, wherein the abrasive element is mounted in a fixed position relative to the drive shaft; and two fluid inflatable counterweights fixed to the drive shaft so as to rotate together with the abrasive element, each of the two fluid inflatable counterweights having a maximum outer diameter that is smaller than a maximum outer diameter of the abrasive element, the inflatable counterweights comprising; a distal fluid inflatable counterweight located at a distal end of the drive shaft and spaced away from the abrasive element and, a proximal fluid inflatable counterweight located on the drive shaft proximal to and spaced away from the abrasive element. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification