Rotational atherectomy device with eccentric abrasive element and method of use
First Claim
1. A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
- a flexible rotatable drive shaft including a fluid impermeable wall, the drive shaft having an elongated proximal portion and an elongated distal portion;
an eccentric abrasive element mounted to the drive shaft and having a center of mass that is offset from a longitudinal axis of the drive shaft;
a distal stability element fixed to the drive shaft at a location distal to the eccentric abrasive element, the distal stability element having a center of mass aligned with the longitudinal axis of the drive shaft;
a first elongated drive shaft sheath configured for receiving the elongated proximal portion of the drive shaft, the first drive shaft sheath having a distal end and configured for advancement around corresponding portions of the drive shaft into a treated artery;
an inflatable balloon attached to the first elongated drive shaft sheath configured to expand to engage an artery wall; and
wherein the flexible rotatable drive shaft is rotatable within the drive shaft sheath while the eccentric abrasive element is positioned between the distal end of the drive shaft sheath and the distal stability element for rotating in an orbital path while the elongated distal portion of the drive shaft extends distally beyond the distal stability element;
wherein the distal stability element is a distal-most stability element, and the distal portion of the drive shaft extends distally from the distal-most stability element for a length that is greater than an axial length of the stability element.
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Accused Products
Abstract
A rotational atherectomy device for removing a stenotic tissue from the iliac artery of a patient. The device comprises a flexible, rotatable drive shaft having an elongated proximal portion, an elongated distal portion. An abrasive element is mounted to the drive shaft between the elongated proximal and distal portions of the drive shaft and between and spaced away from a pair of counterweights which are mounted to said elongated portions of the drive shaft. The eccentric abrasive element and the counterweights are configured for rapid rotation together with the drive shaft, the drive shaft is configured to extend throughout an entire length of the iliac artery to be treated. One elongated portion of the drive shaft extends out of the patient through a first access opening located in a femoral artery which is ipsilateral to the treated artery. Another elongated portion of the drive shaft extending through a second access opening located in another peripheral artery of the patient. A method of treating an iliac artery of a patient using such a rotational atherectomy device.
54 Citations
19 Claims
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1. A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
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a flexible rotatable drive shaft including a fluid impermeable wall, the drive shaft having an elongated proximal portion and an elongated distal portion; an eccentric abrasive element mounted to the drive shaft and having a center of mass that is offset from a longitudinal axis of the drive shaft; a distal stability element fixed to the drive shaft at a location distal to the eccentric abrasive element, the distal stability element having a center of mass aligned with the longitudinal axis of the drive shaft; a first elongated drive shaft sheath configured for receiving the elongated proximal portion of the drive shaft, the first drive shaft sheath having a distal end and configured for advancement around corresponding portions of the drive shaft into a treated artery; an inflatable balloon attached to the first elongated drive shaft sheath configured to expand to engage an artery wall; and wherein the flexible rotatable drive shaft is rotatable within the drive shaft sheath while the eccentric abrasive element is positioned between the distal end of the drive shaft sheath and the distal stability element for rotating in an orbital path while the elongated distal portion of the drive shaft extends distally beyond the distal stability element; wherein the distal stability element is a distal-most stability element, and the distal portion of the drive shaft extends distally from the distal-most stability element for a length that is greater than an axial length of the stability element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for performing rotational atherectomy to remove stenotic lesion material from a blood vessel of a patient, the system comprising:
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a flexible rotatable drive shaft having an elongated proximal portion, an elongated distal portion, and a fluid impermeable wall; an eccentric abrasive element mounted to the drive shaft and having a center of mass that is offset from a longitudinal axis of the drive shaft; a distal stability element fixed to the drive shaft at a location distal to the eccentric abrasive element, the distal stability element aligned with the longitudinal axis of the drive shaft; wherein the eccentric abrasive element is configured for rapid rotation with the drive shaft in an orbital path about the longitudinal axis of the drive shaft while the elongated distal portion of the drive shaft extends distally beyond the distal stability element; and wherein the distal stability element is a distal-most stability element, and the distal portion of the drive shaft extends distally from the distal-most stability element for a length that is greater than an axial length of the stability element. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification