Topical brachytherapy device and method of treatment of malignant cancer cells
US11123445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2019 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Mar 7, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1094
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A flexible brachytherapy device includes a bioresorbable carrier matrix structure comprising a plurality of radio-isotope particles and having opposite first and second surfaces. The bioresorbable carrier matrix structure degrades, when implanted at a wound site, at a rate such that the bioresorbable carrier matrix structure has a half-life that is longer than a half-life of the plurality of radio-isotope particles. A hydrophilic substrate located adjacent to the first surface of the bioresorbable carrier matrix structure degrades, when implanted at the wound site, at a rate faster than the bioresorbable carrier matrix structure. A hydrogel substrate located adjacent to the second surface of the bioresorbable carrier matrix structure shields radioactivity and degrades at a rate such that the hydrogel substrate has a half-life that is longer than the half-life of the plurality of radio-isotope particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.