Surgery – Radioactive substance applied to body for therapy – Radioactive substance placed within body
Patent
1997-06-03
1999-01-05
Lacyk, John P.
Surgery
Radioactive substance applied to body for therapy
Radioactive substance placed within body
604 96, 604103, A61N 500
Patent
active
058555463
ABSTRACT:
A catheter capable of irradiating blood vessel walls to inhibit restenosis after angioplasty. Catheters are capable of simultaneous irradiation, angioplasty, and in some devices, drug infusion. Preferred catheters include a helical perfusion balloon having strand windings spaced apart when inflated and defining a perfusion lumen within. A tubular sheath over the helical strands and distal shaft region is used in some embodiments and defines an outer wall for the perfusion lumen. A spiral, inter-strand space is defined between the sheath outer wall and the blood vessel inner wall, providing a confined volume for controlled delivery of drugs to the vessel wall in conjunction with irradiation. A device having a radiation wire, distally closed-end tube is provided. A device having a radiation wire open ended tube terminating proximally of the perfusion lumen is also provided.
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Hastings Roger N.
Urick Michael J.
Lacyk John P.
Sci-Med Life Systems
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