Guidewire for cannula placement
AssigneeABIOMED, Inc.
InventorsZhenghong Tao, Michael Thomas Finnegan
Life of this patent
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Abstract
A guidewire for backloading and inserting a percutaneous pump affixed to a cannula includes a proximal section made of a first material, with a first diameter, a rounded proximal end, and a distal end. The guidewire also includes a distal section made of a second material, with a second diameter which is greater than the first diameter, a distal end, and a proximal end abutting the distal end of the proximal section. The first material of the proximal section is selected to be softer than a material of the percutaneous pump to reduce damage to the pump during backloading. The distal section of the guidewire is configured to be stiffer than the proximal section to insert the percutaneous pump in a desired location without damaging the guidewire.
Claims20
A system for the insertion of a pump configured for percutaneous insertion into a vascular system, the system comprising:
- a pump comprising a housing and blades with a first stiffness;
- a cannula with a cannula diameter, a proximal inlet, and a distal outlet;
- and
- a guidewire with a proximal section with a second stiffness and having a first diameter, and a distal section connected to the proximal section, the distal section with a third stiffness and having a second diameter greater than the first diameter,
- wherein the distal section is stiffer than the proximal section to insert the cannula in a desired location without displacing the guidewire, and the first stiffness of the blades of the pump is greater than the second stiffness to reduce damage to the blades of the pump when inserting the proximal section of the guidewire between the housing and the blades.
A guidewire for the insertion of a pump configured for percutaneous insertion into a vascular system, the guidewire comprising:
- a proximal section with a first stiffness and having a first diameter, a proximal end, and a distal end;
- and
- a distal section with a second stiffness greater than the first stiffness, and having a second diameter greater than the first diameter, a distal end, and a proximal end connected to the distal end of the proximal section,
- wherein a third stiffness of blades of a pump is greater than the first stiffness to reduce damage to the blades of the pump when the proximal section of the guidewire is inserted into the pump.
A method for inserting a pump configured for insertion into a vascular system, the method comprising:
- inserting a guidewire into a cannula through a distal end of the cannula, the distal end of the cannula supporting the pump;
- and
- pushing the guidewire through the pump,
- wherein the guidewire includes a proximal section made of a first material with a first stiffness that is less than a stiffness of blades of the pump and a first diameter, and a distal section connected to the proximal section, the distal section made of a second material with a second stiffness greater than the first stiffness and a second diameter greater than the first diameter.
Dependencies are inferred from the claim text.