Perfusion balloon catheter with radioactive source
First Claim
Patent Images
1. A device for irradiating vessel walls comprising:
- an elongate tubular member having a proximal portion and a distal portion, said tubular member including an inflation lumen extending the length thereof;
ana perfusion head attached to said elongate member distal portion, said perfusion head including an inflatable balloon in fluid communication with said inflation lumen, said perfusion head having a perfusion tube forming a perfusion lumen extending longitudinally through said balloon, said perfusion tube, at least in part, containing a radiation emitting material fixedly disposed thereon.
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Abstract
A device for irradiating human vessel interior walls including a perfusion balloon catheter having a radioactive perfusion tube affixed therein. Preferably, the balloon is helical, having adjacent helical strand windings closely spaced in contact upon inflation to minimize trapped blood and reduce attenuation. The perfusion tube can be made radioactive by inclusion of a helical, radioactive metal coil in the perfusion tube wall. In use, the catheter can be advanced over a guide wire to a stenosis, inflated to dilate the site, with beta radiation from the coil passing through the device to the vessel walls, relatively unhindered by blood.
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Citations
14 Claims
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1. A device for irradiating vessel walls comprising:
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an elongate tubular member having a proximal portion and a distal portion, said tubular member including an inflation lumen extending the length thereof;
ana perfusion head attached to said elongate member distal portion, said perfusion head including an inflatable balloon in fluid communication with said inflation lumen, said perfusion head having a perfusion tube forming a perfusion lumen extending longitudinally through said balloon, said perfusion tube, at least in part, containing a radiation emitting material fixedly disposed thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for treating a stenosed vessel site comprising the steps of:
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providing a catheter for irradiating vessel walls including an elongate tubular member having a proximal portion and a distal portion, said tubular member including an inflation lumen, said catheter further including a perfusion head attached to said elongate member distal portion, said perfusion head including an inflatable balloon in fluid communication with said inflation lumen, said perfusion head having a perfusion tube therethrough forming a perfusion lumen, said perfusion tube at least in part, containing a radiation emitting material fixedly disposed thereon; inserting said device into the vasculature of a patient such that the perfusion head is positioned adjacent to a treatment site; inflating said inflatable balloon; and exposing said treatment site to radiation from said radioactive wall through the balloon. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification