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;
an eccentric abrasive element having a solid body that defines a fixed size and being rigidly mounted to the drive shaft on a region of the drive shaft proximal to and spaced away from its distal end; 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 by a distal separation distance, anda proximal fluid inflatable counterweight located on the drive shaft proximal to and spaced away from the abrasive element by a proximal separation distance,each of the distal separation distance and the proximal separate distance being greater than a maximum longitudinal dimension of 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 die drive shaft to entrain debris abraded by the abrasive element for removal of said debris from the patient.
72 Citations
11 Claims
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1. 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 having a longitudinal axis of rotation; an eccentric abrasive element having a solid body that defines a fixed size and being rigidly mounted to the drive shaft on a region of the drive shaft proximal to and spaced away from its distal end; 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 by a distal separation distance, and a proximal fluid inflatable counterweight located on the drive shaft proximal to and spaced away from the abrasive element by a proximal separation distance, each of the distal separation distance and the proximal separate distance being greater than a maximum longitudinal dimension of the abrasive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification