US 5,913,813 AGranted

Double-wall balloon catheter for treatment of proliferative tissue

AssigneeProxima Therapeutics, Inc.

InventorsJeffery A. Williams, Christopher H. Porter, Jeffrey F. Williamson, James F. Dempsey, Timothy J. Patrick, James B. Stubbs

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Abstract

An instrument for use in brachytherapy comprises a concentric arrangement of inner and outer distensible, spherical chambers disposed near the proximal end of a catheter body where one of the chambers is made to contain a radioactive material with the other chamber containing a radiation absorptive material, the apparatus functioning to provide a more uniform absorbed dose profile in tissue surrounding a cavity created by the removal of a tumor. An alternative embodiment includes non-spherical inner and outer chambers whose respective walls are spaced equidistant over the entire surfaces thereof.

Claims13

Dependent claims

Apparatus for delivering radioactive emissions to a body location with a uniform radiation profile, comprising:

(a) a catheter body member having a proximal end and distal end;
(b) an inner spatial volume disposed proximate the distal end of the catheter body member;
(c) an outer, closed, inflatable, chamber defined by a radiation transparent wall affixed to the body member proximate the distal end thereof in surrounding relation to the inner spatial volume with a predetermined constant spacing between said inner spatial volume and the radiation transparent wall;
(d) a material containing a radionuclide(s) disposed in one of the inner spatial volume and outer chamber;
and
(e) means disposed in the other of the inner spatial volume and outer chamber for rendering uniform the radial absorbed dose profile of the emissions from the one of the inner spatial volume and outer chamber containing the radionuclides.

3 more elements

Dependencies are inferred from the claim text.