A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 5/00 (2006.01) A61N 5/10 (2006.01)
Patent
CA 2296430
An instrument (10) for use in brachy-therapy comprises a concentric arrangement of inner and outer distensible, spherical chambers (30, 34) disposed near the proximal end of a catheter body (12) where one of the chambers (30, 34) is made to contain a radioactive material with the other chamber (30, 34) containing a radiation absorptive material, the apparatus (10) 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.
Cet instrument (10) utilisable en brachy-thérapie comporte un agencement concentrique de chambres sphériques (30, 34), externe et interne, susceptibles de se dilater, placées près de l'extrémité proximale du corps de cathéter (12), l'une des chambres (30, 34) étant faite pour contenir une matière radioactive et l'autre une matière absorbant la radioactivité. Cet appareil (10) est conçu pour fournir une dose absorbée plus homogène aux tissus entourant une cavité créée par l'ablation d'une tumeur. Dans une variante de l'invention, la réalisation comporte des chambres, interne et externe, non sphériques dont les surfaces des parois respectives se trouent à équidistance l'une de l'autre.
Dempsey James F.
Patrick Timothy J.
Porter Christopher H.
Stubbs James B.
Williams Jeffery A.
Cytyc Corporation
Proxima Therapeutics Inc.
Ridout & Maybee Llp
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