Atherectomy Devices and Methods
First Claim
1. A rotational atherectomy system comprising:
- a rotational atherectomy device comprising;
a handle assembly including a housing, a rotatable member disposed within the housing, and a carriage to which the rotatable member is rotatably attached, wherein the carriage is longitudinally translatable in relation to the housing;
an elongate flexible drive shaft comprising a torque-transmitting coil extending from the housing, the drive shaft defining a central lumen and a longitudinal axis, and the drive shaft being coupled to the rotatable member such that rotation of the rotatable member rotates the drive shaft about the longitudinal axis;
a combination of multiple eccentric abrasive elements and a concentric distal stability element attached to the drive shaft, each of the multiple eccentric abrasive elements being longitudinally spaced apart from one another and having a respective center of mass offset from the longitudinal axis while the concentric distal stability element is spaced distally from the multiple eccentric abrasive elements and has a respective center of mass aligned with the longitudinal axis;
a sheath having a proximal end attached to the housing, the sheath defining a longitudinal sheath lumen therethrough in which the drive shaft is slidably disposed; and
a controller operatively connected with the rotational atherectomy device and configured to control rotation of the rotatable member.
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.
9 Citations
20 Claims
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1. A rotational atherectomy system comprising:
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a rotational atherectomy device comprising; a handle assembly including a housing, a rotatable member disposed within the housing, and a carriage to which the rotatable member is rotatably attached, wherein the carriage is longitudinally translatable in relation to the housing; an elongate flexible drive shaft comprising a torque-transmitting coil extending from the housing, the drive shaft defining a central lumen and a longitudinal axis, and the drive shaft being coupled to the rotatable member such that rotation of the rotatable member rotates the drive shaft about the longitudinal axis; a combination of multiple eccentric abrasive elements and a concentric distal stability element attached to the drive shaft, each of the multiple eccentric abrasive elements being longitudinally spaced apart from one another and having a respective center of mass offset from the longitudinal axis while the concentric distal stability element is spaced distally from the multiple eccentric abrasive elements and has a respective center of mass aligned with the longitudinal axis; a sheath having a proximal end attached to the housing, the sheath defining a longitudinal sheath lumen therethrough in which the drive shaft is slidably disposed; and a controller operatively connected with the rotational atherectomy device and configured to control rotation of the rotatable member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification