Atherectomy devices and methods
First Claim
1. A method of performing a rotational atherectomy, the method comprising:
- advancing a drive shaft of a rotation atherectomy device along a guidewire so that a set of five ellipsoid eccentric abrasive elements mounted along a distal end portion of the drive shaft is directed toward a targeted vessel, the drive shaft comprising a torque-transmitting coil extending from a handle assembly and being configured to rotate in response to rotation of a rotatable member housed within the handle assembly, the set of five ellipsoid eccentric abrasive elements comprising a distal-most eccentric abrasive element, a proximal-most eccentric abrasive element, and three intermediate eccentric abrasive elements, and both the proximal-most eccentric abrasive element and the distal-most eccentric abrasive element are smaller in maximum diameter than a maximum diameter of each of the three intermediate eccentric abrasive elements; and
rotating the rotatable member coupled to a proximal portion of the drive shaft to drive rotation of the drive shaft about a longitudinal axis of the drive shaft.
3 Assignments
0 Petitions
Accused Products
Abstract
Rotational atherectomy devices and systems can remove or reduce stenotic lesions in blood vessels by rotating an abrasive element within the vessel. The abrasive element can be attached to a distal portion of an elongate flexible drive shaft that extends from a handle assembly. In particular embodiments, the handle assembly includes a compressed gas driven turbine member that drives rotation of the drive shaft. The turbine member can be rotatably attached to a carriage that is longitudinally translatable in relation to a housing of the handle assembly. The handle assembly can include a latch mechanism that when actuated allows the carriage to translate to a proximal-most position. While the carriage is in the proximal-most position, an open pathway is created so that a guidewire can be slidably passed through the handle assembly and a lumen of the drive shaft.
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Citations
20 Claims
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1. A method of performing a rotational atherectomy, the method comprising:
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advancing a drive shaft of a rotation atherectomy device along a guidewire so that a set of five ellipsoid eccentric abrasive elements mounted along a distal end portion of the drive shaft is directed toward a targeted vessel, the drive shaft comprising a torque-transmitting coil extending from a handle assembly and being configured to rotate in response to rotation of a rotatable member housed within the handle assembly, the set of five ellipsoid eccentric abrasive elements comprising a distal-most eccentric abrasive element, a proximal-most eccentric abrasive element, and three intermediate eccentric abrasive elements, and both the proximal-most eccentric abrasive element and the distal-most eccentric abrasive element are smaller in maximum diameter than a maximum diameter of each of the three intermediate eccentric abrasive elements; and rotating the rotatable member coupled to a proximal portion of the drive shaft to drive rotation of the drive shaft about a longitudinal axis of the drive shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of performing a rotational atherectomy on a targeted lesion of a patient, the method comprising:
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advancing a drive shaft assembly of a rotation atherectomy device along a guide wire disposed within a vasculature of the patient so that a distal end of the drive shaft assembly is advanced toward the targeted lesion, the drive shaft assembly comprising; a sheath comprising an elongate tubular member defining a lumen therethrough; a torque-transmitting coil slidably disposed within the lumen and extending distally from a handle assembly positioned at a proximal end of the torque-transmitting coil, the torque-transmitting coil configured to rotate in response to rotation of a rotatable member housed within the handle assembly; and a set of at least three same-shaped eccentric abrasive elements attached to a distal end portion of the torque-transmitting coil, the set of at least three same-shaped eccentric abrasive elements comprising a distal-most eccentric abrasive element, a proximal-most, and one or more intermediate eccentric abrasive elements, and both the proximal-most eccentric abrasive element and the distal-most eccentric abrasive element are smaller in maximum diameter than a maximum diameter of each of the one or more intermediate eccentric abrasive elements; and a distal stability element fixed to the torque-transmitting coil and having a center of mass that is axially aligned with a longitudinal axis of the torque-transmitting coil; and rotating the rotatable member to drive rotation of the torque-transmitting coil such that the set of at least three same-shaped eccentric abrasive elements contact the targeted lesion. - View Dependent Claims (17, 18, 19, 20)
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Specification