Eccentric system of abrasive elements with equal mass for rotational atherectomy
First Claim
1. A rotational atherectomy device, comprising:
- a flexible, elongated and rotatable drive shaft, the drive shaft comprising a rotational axis;
an eccentric system of abrasive elements comprising;
a first abrasive element fixedly disposed along on the drive shaft and comprising a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a first longitudinal plane located at a first rotational angle position;
a second abrasive element fixedly disposed along on the drive shaft and spaced proximally from the first abrasive element and comprising a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a second longitudinal plane that is spaced rotationally a distance from the first longitudinal plane; and
a third abrasive element fixedly disposed along on the drive shaft and spaced distally from the first abrasive element and comprising a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a third longitudinal plane that is rotationally spaced a distance from the second longitudinal plane,wherein the mass of the first abrasive element, the mass of the second abrasive element and the mass of the third abrasive element are substantially equivalent.
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Abstract
The invention provides a rotational atherectomy device having, in various embodiments, a flexible, elongated, rotatable drive shaft with a plurality of eccentric abrading heads attached thereto. At least part of the eccentric enlarged abrading heads in the system have a tissue removing surface such as an abrasive surface. In certain embodiments, the plurality of abrasive elements may be connected to the drive shaft, with adjacent abrasive elements spaced apart from each other, wherein each of the plurality of abrasive elements comprises a center of mass that is radially offset from the rotational axis of the drive shaft and wherein the centers of mass for adjacent abrasive elements are rotationally spaced apart from each other at a rotational angle within the range of between 0 degrees to 90 degrees.
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Citations
30 Claims
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1. A rotational atherectomy device, comprising:
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a flexible, elongated and rotatable drive shaft, the drive shaft comprising a rotational axis; an eccentric system of abrasive elements comprising; a first abrasive element fixedly disposed along on the drive shaft and comprising a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a first longitudinal plane located at a first rotational angle position; a second abrasive element fixedly disposed along on the drive shaft and spaced proximally from the first abrasive element and comprising a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a second longitudinal plane that is spaced rotationally a distance from the first longitudinal plane; and a third abrasive element fixedly disposed along on the drive shaft and spaced distally from the first abrasive element and comprising a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a third longitudinal plane that is rotationally spaced a distance from the second longitudinal plane, wherein the mass of the first abrasive element, the mass of the second abrasive element and the mass of the third abrasive element are substantially equivalent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A rotational atherectomy device, comprising:
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a flexible, elongated and rotatable drive shaft, the drive shaft comprising a rotational axis; an eccentric system of abrasive elements comprising; a first abrasive element fixedly disposed along the drive shaft and comprising a resting diameter, a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a first longitudinal plane; a second abrasive element fixedly disposed along the drive shaft and spaced proximally from the first abrasive element and comprising a resting diameter, a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a second longitudinal plane that is spaced rotationally from the first longitudinal plane; a third abrasive element fixedly disposed along the drive shaft and spaced distally from the first abrasive element and comprising a mass, a resting diameter and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a third longitudinal plane that is spaced rotationally from the first longitudinal plane and spaced rotationally from the second longitudinal plane; a fourth abrasive element fixedly disposed along the drive shaft and spaced proximally from the second abrasive element and comprising a resting diameter, a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a fourth longitudinal plane that is spaced rotationally from the second longitudinal plane; and a fifth abrasive element fixedly disposed along the drive shaft and spaced distally from the third abrasive element and comprising a resting diameter, a mass and a center of mass having a location that is spaced radially away from the rotational axis of the drive shaft in a direction along a fifth longitudinal plane that is spaced rotationally from the third longitudinal plane, wherein the masses of the first abrasive element, the second abrasive element, the third abrasive element, the fourth abrasive element and the fifth abrasive element are substantially equivalent. - View Dependent Claims (21, 22, 23)
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24. A high-speed rotational atherectomy device for opening a stenosis in a blood vessel, comprising:
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a flexible elongated, rotatable drive shaft, the drive shaft having a rotational axis; and an eccentric system comprising a proximal abrasive element, a distal abrasive element and a plurality of abrasive elements disposed between the proximal and distal eccentric abrasive elements, each abrasive element in the eccentric system being in spaced apart longitudinal disposition along the drive shaft and comprising a mass and a center of mass that is radially offset from the rotational axis of the drive shaft, wherein the centers of mass for adjacent abrasive elements are rotationally spaced apart from each other at a rotational angle within the range of between 0 degrees to 90 degrees; and wherein the eccentric system comprises a center of mass that is radially offset from the rotational axis of the drive shaft, and wherein the masses of each abrasive element in the eccentric system are substantially equivalent. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification