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AssigneeKensey Nash Corporation
InventorsJohn E. Nash, William T. Fisher, Charles W. Dodson JR., John Michael Henderson, Joseph W. Kaufmann
Estimating the term…
A system and method for opening a lumen in an occluded blood vessel, e.g., a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e.g., a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e.g., impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the being's body. The introduction of the infusate liquid may also be used to establish an unbalanced flow adjacent the working head to enable the atherectomy catheter to be steered hydrodynamically. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid. At least one flow control port may be provided in the guide catheter to prevent collapse of the vessel being revascularized. A cradle is provided to fix the guide catheter and guide wire in position within the body of the being while enabling the atherectomy catheter to be advanced along the guide wire and through the guide catheter. The guide catheter includes a wear resistant coating and is constructed so that its distal end includes plural sections of different outside diameters, with the distal most section being of the smallest outside diameter. A control console is provided to establish various modes of operation of the system based on manual inputs via switches or voice commands via voice recognition circuitry. A video panel displays the various modes of operation and instructions to the operator.
A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having a wear resistant coating for reducing wear on the guidewire resulting from the rotation of the rotating working head.
A wear resistant coating for a tubular guidewire for deployment in the body of a living being wherein the guidewire in bent during its deployment, said wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the intravascular system comprising an instrument for opening the lumen in the occluded blood vessel portion and being arranged to be guided to a desired position by said guide wire, said guide wire being arranged to be bent during its deployment within the being's vascular system and having a wear resistant coating, said wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having a wear resistant coating having properties to prevent the flaking thereof when the guidewire is bent to a small radius on the order of approximately 0.375 inch (9.5 mm).
A wear resistant coating for a tubular guidewire for deployment in the body of a living being wherein the guidewire in bent during its deployment, said wear resistant coating being harder than 58 Rockwell C.
A tubular guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the intravascular system comprising an instrument for opening the lumen in the occluded blood vessel portion and being arranged to be guided to a desired position by said guide wire, said guide wire being arranged to be bent during its deployment within the being's vascular system and having a wear resistant coating, said wear resistant coating being harder than 58 Rockwell C.
A guidewire for use in an intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material and being located downstream of a patent blood vessel portion, the intravascular system comprising a rotary atherectomy instrument having a rotary working head, the instrument being arranged to be mounted on said guidewire and moved with respect thereto so that the working head is located adjacent the occlusive material, said guidewire having more than one coating, one of said coatings having wear resistant properties and another of said coatings having a low coefficient of friction.
An intravascular system for use by an operator to open a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said intravascular system comprising an instrument for opening a lumen in the occlusive material and a control system, said instrument being arranged to be extended into the blood vessel portion to a position adjacent the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough under the control of said control system, said control system enabling plural modes of operation of said instrument and comprising a display and means for accepting an audio command regarding a mode of operation to be accomplished from the operator and for visually displaying that mode of operation on said display.
Dependencies are inferred from the claim text.