Rotational atherectomy device with a system of eccentric abrading heads
First Claim
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1. A high-speed rotational atherectomy device for opening a stenosis in an artery having a given diameter, comprising:
- a guide wire having a maximum diameter less than the diameter of the artery;
a flexible elongated, rotatable drive shaft advanceable over the guide wire, the drive shaft having a rotational axis; and
an unbalanced system of more than one eccentric abrading head in spaced apart longitudinal disposition along the drive shaft, the more than one eccentric abrading heads each having a resting diameter, wherein a distal eccentric abrading head comprises a resting diameter that is the smallest resting diameter in the unbalanced system and the remaining eccentric abrading heads in the unbalanced system comprise resting diameters that increase successively from distal to proximal, wherein the most proximal eccentric abrading head comprises the largest resting diameter in the unbalanced system, each eccentric abrading head in the unbalanced system further comprising a geometric center and a center of mass, wherein the geometric center and center of mass are radially offset from the rotational axis of the drive shaft; and
a spiral channel disposed between the successively spaced apart eccentric abrading heads defined by a rotational separation between adjacent eccentric abrading heads in the unbalanced system.
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Abstract
The invention provides a rotational atherectomy device having a flexible, elongated, rotatable drive shaft with a system of eccentric abrading heads attached thereto. The eccentric enlarged abrading heads may have centers of mass spaced radially from the rotational axis of the drive shaft, wherein adjacent eccentric abrading heads, and centers of mass thereof, are rotationally separated from each other on the drive shaft.
14 Citations
20 Claims
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1. A high-speed rotational atherectomy device for opening a stenosis in an artery having a given diameter, comprising:
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a guide wire having a maximum diameter less than the diameter of the artery; a flexible elongated, rotatable drive shaft advanceable over the guide wire, the drive shaft having a rotational axis; and an unbalanced system of more than one eccentric abrading head in spaced apart longitudinal disposition along the drive shaft, the more than one eccentric abrading heads each having a resting diameter, wherein a distal eccentric abrading head comprises a resting diameter that is the smallest resting diameter in the unbalanced system and the remaining eccentric abrading heads in the unbalanced system comprise resting diameters that increase successively from distal to proximal, wherein the most proximal eccentric abrading head comprises the largest resting diameter in the unbalanced system, each eccentric abrading head in the unbalanced system further comprising a geometric center and a center of mass, wherein the geometric center and center of mass are radially offset from the rotational axis of the drive shaft; and a spiral channel disposed between the successively spaced apart eccentric abrading heads defined by a rotational separation between adjacent eccentric abrading heads in the unbalanced system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A high-speed rotational atherectomy device for opening a stenosis in an artery having a given diameter, comprising:
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a guide wire having a maximum diameter less than the diameter of the artery; a flexible elongated, rotatable drive shaft advanceable over the guide wire, the drive shaft having a rotational axis; and an balanced system of more than one eccentric abrading head in spaced apart longitudinal disposition along the drive shaft and comprising a distal eccentric abrading head and a proximal eccentric abrading head, the more than one eccentric abrading heads each having a resting diameter, wherein the distal eccentric abrading head comprises a resting diameter that is the smallest resting diameter in the unbalanced system and the remaining eccentric abrading heads in the balanced system comprise resting diameters that increase successively, wherein the proximal eccentric abrading head comprises a resting diameter that is the largest resting diameter in the balanced system, each eccentric abrading head in the balanced system further comprising a geometric center and a center of mass, wherein the geometric center and center of mass are radially offset from the rotational axis of the drive shaft; and a spiral channel disposed between the successively spaced apart eccentric abrading heads defined by a rotational separation between adjacent eccentric abrading heads in the balanced system. - View Dependent Claims (16, 17, 18, 19)
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20. A high-speed rotational atherectomy device for opening a stenosis in an artery having a given diameter, comprising:
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a guide wire having a maximum diameter less than the diameter of the artery; a flexible elongated, rotatable drive shaft advanceable over the guide wire, the drive shaft having a rotational axis; and an unbalanced system of more than one eccentric abrading head in spaced apart longitudinal disposition along the drive shaft, the more than one eccentric abrading heads each having a resting diameter, wherein each eccentric abrading head in the unbalanced system comprises a geometric center and a center of mass, wherein the geometric center and center of mass are radially offset from the rotational axis of the drive shaft and wherein the centers of mass are all offset radially in different directions and in different planes.
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Specification