Patent Number: 6,251,059

Title: Medical radiation treatment delivery apparatus

Abstract: A catheter apparatus (20) and radiation dosimetry unit indicator (21) for delivery of a prescribed radiation dose to a patient. The catheter is filled with a radiation carrier material such as an inert radioactive gas (12) for the treatment of, for example, restenosis after angioplasty, and malignancies. The inflated catheter includes a plurality of discrete chambers such as balloon sections (22, 24, 26) for transporting the radioactive carrier material, and a plurality of discrete chambers (32, 34, 36) enabling substantial blood flow through the artery during treatment with the prescribed radiation. The inflated catheter can also comprise a one-unit balloon. A specific metal coating enhances the radiation dose delivered to the target. The wall (25) of the inflation lumen attenuates transmission dose to the blood circulating through the hollow inner lumen of the catheter device. The system also creates increased by-product radiation, from the impact of beta particles and gamma protons traveling toward the lumen wall. A radiation dosimetry unit indicator (21) is positioned, disposed, or affixed to a calibrated catheter to assist the physician in prescribing radiation activity and exposure times.

Inventors: Apple; Marc G. (Fort Wayne, IN), Bates; Brian L. (Bloomington, IN), DeFord; John A. (Bloomington, IN), Fearnot; Neal E. (West Lafayette, IN)

Assignee: Cook Incorporated

International Classification: A61M 25/10 (20060101); A61N 5/10 (20060101); A61N 005/00 ()

Expiration Date: 06/26/2018