Radioisotope stent with non-radioactive end sections

Details Radioisotope stent with non-radioactive end sections Radioisotope stent with non-radioactive end sections

1998-11-25

2000-08-08

O'Connor, Cary

Surgery

Radioactive substance applied to body for therapy

Radioactive substance placed within body

A61N 500

Patent

active

06099455&

ABSTRACT:
A radioisotope stent that is made radioactive for most of the stent's length at a center section of the stent, but is not radioactive for a limited length at each end section of the stent. Such a stent design would have a negligible radiation level at the extreme ends of the stent. Therefore, there will not be any portion of the dilated stenosis that has no mechanical support from the stent and is also exposed to a moderate level of radiation. Furthermore, all portions of the dilated stenosis that are exposed to a high or moderate level of radiation will be mechanically supported by the stent so as to preclude the phenomena of late vascular contraction. Thus it is an object of this invention to have a stent that is designed with a comparatively high level of radioactivity at a longitudinally central section of the stent and would be free of any radioactivity at each of the two end sections of the stent.

REFERENCES:
patent: 5059166 (1991-10-01), Fischell et al.
patent: 5840009 (1998-11-01), Fischell et al.
patent: 5882291 (1999-03-01), Bradshaw et al.

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