Rotational atherectomy system
First Claim
1. A system for performing rotational atherectomy to remove stenotic lesion material from within a peripheral artery of a leg of a patient, the system comprising:
- a guidewire configured to be advanced within the peripheral artery and across a stenotic lesion within the peripheral artery such that a distal end portion of the guidewire is positioned below a knee of the leg;
a drive shaft sheath defining a sheath lumen, the sheath lumen configured to slidably receive a rotational atherectomy device such that a distal end portion of the rotational atherectomy device is advanceable out of a distal end of the sheath lumen to position a solid eccentric abrasive element of the rotational atherectomy device at the stenotic lesion and such that the rotational atherectomy device is rotatable within the drive shaft sheath while the drive shaft sheath is stationary; and
the rotational atherectomy device comprising;
a first stability elementan elongate flexible drive shaft comprising a torque transmitting coil that defines a central lumen and a longitudinal axis of the flexible draft shaft, the torque transmitting coil having a uniform coil diameter along a portion to which the abrasive element and the first stability element is mounted, and the central lumen configured to slidably receive the guidewire such that the drive shaft is advanceable over the guidewire to a location of the stenotic lesion and rotatable around the guidewire while the guidewire is stationary and extends distally of the torque transmitting coil and the drive shaft sheath; and
the abrasive element; and
wherein the abrasive element and the first stability element are mounted to the drive shaft such that a center of mass of the abrasive element is offset from the longitudinal axis of the drive shaft while a center of mass of the first stability element is aligned with the longitudinal axis of the drive shaft, the first stability element being distally spaced apart from the eccentric abrasive element and being configured to rotate contemporaneously with the eccentric abrasive element and the torque transmitting coil while the eccentric abrasive element and a portion of the torque transmitting coil to which the eccentric abrasive element is mounted on rotates in an orbital path around an axis of rotation of non-orbiting portions of the drive shaft to perform rotational atherectomy.
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Accused Products
Abstract
An atherectomy system for removing a stenotic lesion from within a vessel of a patient is disclosed. The system comprising an atherectomy device for reducing the lesion and a separate elongate drainage catheter for evacuating from the treated vessel embolic particles released into the vessel from the stenotic lesion during its reduction by the atherectomy device during an atherectomy procedure. The atherectomy device and the separate elongate drainage catheter are each configured for introduction into the patient'"'"'s vasculature though separate openings in at least one peripheral artery of the patient.
71 Citations
21 Claims
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1. A system for performing rotational atherectomy to remove stenotic lesion material from within a peripheral artery of a leg of a patient, the system comprising:
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a guidewire configured to be advanced within the peripheral artery and across a stenotic lesion within the peripheral artery such that a distal end portion of the guidewire is positioned below a knee of the leg; a drive shaft sheath defining a sheath lumen, the sheath lumen configured to slidably receive a rotational atherectomy device such that a distal end portion of the rotational atherectomy device is advanceable out of a distal end of the sheath lumen to position a solid eccentric abrasive element of the rotational atherectomy device at the stenotic lesion and such that the rotational atherectomy device is rotatable within the drive shaft sheath while the drive shaft sheath is stationary; and the rotational atherectomy device comprising; a first stability element an elongate flexible drive shaft comprising a torque transmitting coil that defines a central lumen and a longitudinal axis of the flexible draft shaft, the torque transmitting coil having a uniform coil diameter along a portion to which the abrasive element and the first stability element is mounted, and the central lumen configured to slidably receive the guidewire such that the drive shaft is advanceable over the guidewire to a location of the stenotic lesion and rotatable around the guidewire while the guidewire is stationary and extends distally of the torque transmitting coil and the drive shaft sheath; and the abrasive element; and wherein the abrasive element and the first stability element are mounted to the drive shaft such that a center of mass of the abrasive element is offset from the longitudinal axis of the drive shaft while a center of mass of the first stability element is aligned with the longitudinal axis of the drive shaft, the first stability element being distally spaced apart from the eccentric abrasive element and being configured to rotate contemporaneously with the eccentric abrasive element and the torque transmitting coil while the eccentric abrasive element and a portion of the torque transmitting coil to which the eccentric abrasive element is mounted on rotates in an orbital path around an axis of rotation of non-orbiting portions of the drive shaft to perform rotational atherectomy. - 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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21. A system for performing rotational atherectomy to remove stenotic lesion material from within a peripheral artery of a leg of a patient, the system comprising:
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a guidewire configured to be advanced within the peripheral artery and across a stenotic lesion within the peripheral artery such that a distal end portion of the guidewire is positioned below a knee of the leg; a drive shaft sheath defining a sheath lumen, the sheath lumen configured to slidably receive a rotational atherectomy device such that a distal end portion of the rotational atherectomy device is advanceable out of a distal end of the sheath lumen to position a solid eccentric abrasive element of the rotational atherectomy device at the stenotic lesion and such that the rotational atherectomy device is rotatable within the drive shaft sheath while the drive shaft sheath is stationary; and the rotational atherectomy device comprising; an elongate flexible drive shaft comprising a torque transmitting coil that defines a central lumen and a longitudinal axis of the flexible draft shaft, and the central lumen configured to slidably receive the guidewire such that the drive shaft is advanceable over the guidewire to a location of the stenotic lesion and rotatable around the guidewire while the guidewire is stationary and extends distally of the torque transmitting coil and the drive shaft sheath; the abrasive element mounted to the drive shaft such that a center of mass of the abrasive element is offset from the longitudinal axis of the drive shaft and a first stability element mounted to the drive shaft such that a center of mass of the first stability element is aligned with the longitudinal axis of the drive shaft, the first stability element being distally spaced apart from the eccentric abrasive element and being configured to rotate contemporaneously with the eccentric abrasive element and the torque transmitting coil while the eccentric abrasive element rotates in an orbital path of the peripheral artery to perform rotational atherectomy; a second stability element that is fixed to the drive shaft and that has a center of mass aligned with the longitudinal axis, the second stability element being proximally spaced apart from the abrasive element; wherein the first and second stability elements comprise inflatable stability elements.
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Specification