Radiation delivery catheter
AssigneeWorld Medical Manufacturing Corporation
InventorHoward J. Leonhardt
Life of this patent
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Abstract
A radiation delivery catheter with inflatable chambers which provide a layer of radiation of minimum effective dose possible to be delivered as close as possible to the origin of disease within a blood vessel. The device can be centered within the true lumen of a vessel to provide even dispersion of the radiation agent to the outer wall of the vessel. The catheter comprises two central self centering balloons, one thin radiation agent inflatable chamber, and one radiation spread cloaking inflatable chamber with high strength properties resistant to rupture.
Claims21
A catheter tip, comprising:
- a) a balloon;
- b) a first inflatable chamber disposed around the balloon and capable of being fluidly connected to a first lumen of a catheter;
- and
- c) a second inflatable chamber disposed around the first inflatable chamber and capable of being fluidly connected to a second lumen of the catheter.
A radiation delivery apparatus for delivering radiation to a blood vessel having a lumen and a vessel wall, the radiation delivery apparatus, comprising:
- a catheter having a plurality of lumens and having a distal end;
- at least one balloon disposed at the distal end of the catheter and connected to one of the plurality of lumens;
- a first inflatable chamber disposed around the balloon and connected to one of the plurality of lumens;
- a second inflatable chamber disposed around the first chamber and connected to one of the plurality of lumens;
- and
- a guide wire disposed inside the catheter through one of the plurality of lumens.
A radiation delivery apparatus for delivering radiation to a diseased blood vessel having a lumen and a vessel wall, the radiation delivery apparatus, comprising:
- a catheter having a plurality of lumens and having a distal end;
- means for providing radiation to the wall of the diseased blood vessel;
- means for pressing the radiation means against the vessel wall;
- means for centering the catheter inside the lumen of the blood vessel;
- means for shielding the radiation means during deployment and removal of the catheter;
- and
- means for conveying substances through the plurality of lumens to the radiation means, pressing means, and shielding means.
A method of delivering radiation to a lumen of a diseased blood vessel, comprising the steps of:
- providing a radiation delivery apparatus for delivering radiation to a blood vessel having a lumen and a vessel wall, the radiation delivery apparatus, comprising:
- a catheter having a plurality of lumens and having a distal end;
- at least one balloon disposed at the distal end of the catheter and connected to one of the plurality of lumens;
- a first inflatable chamber disposed around the balloon and connected to one of the plurality of lumens;
- a second inflatable chamber disposed around the first chamber and connected to one of the plurality of lumens;
- and a guide wire disposed inside the catheter through one of the plurality of lumens;
- to form a radiation delivering balloon catheter;
- inserting the guide wire percutaneously through the femoral artery and retrieving the guide wire through a predetermined upper artery;
- deploying the radiation delivering balloon catheter along the guide wire to the lumen of the diseased blood vessel;
- inflating the balloon with an inert solution to center the catheter inside the lumen of the blood vessel;
- inflating the first inflatable chamber by filling the chamber with a radiation emitting substance;
- inflating the balloon to press the first inflatable chamber against the vessel wall;
- providing radiation to the diseased blood vessel for a predetermined amount of time;
- inflating the second inflatable chamber by filling the chamber with a substance capable of inhibiting the spread of radiation;
- deflating the balloon and the first inflatable chamber;
- and
- removing the radiation delivering balloon catheter and the guide wire from the blood vessel.
Dependencies are inferred from the claim text.