초록 ▼

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 a

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.

대표청구항 ▼

[ What is claimed is:] [1.] A device for irradiating vessel walls comprising:an elongate tubular member having a proximal portion and a distal portion and a radiation source lumen extending therethrough; anda perfusion head attached to said elongate member distal portion, said perfusion head includi

[ What is claimed is:] [1.] A device for irradiating vessel walls comprising:an elongate tubular member having a proximal portion and a distal portion and a radiation source lumen extending therethrough; anda perfusion head attached to said elongate member distal portion, said perfusion head including an inflatable balloon in fluid communication with an inflation lumen wherein the inflation lumen extends at least to the elongate member proximal portion, said perfusion head having a perfusion tube forming a perfusion lumen separate from said radiation source lumen and extending longitudinally through said balloon; and a radiation source disposed in said radiation source lumen.