Delivery system and prescription method for interstitial radiation therapy using enhanced parametric release sterilization techniques
US7540998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Apr 20, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1011
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A process is provided for sterilizing brachytherapy devices with Ethylene Oxide gas and releasing the devices on a parametric release basis. Devices that can be sterilized with this process include interstitial radiation seed strand implants and the needles used for implantation. In order to be sterilized effectively by EtO gas, the devices are constructed such that surfaces not readily infused with EtO gas are made to be gas permeable, and will not retain the gas after the sterilization process. Performance qualification of the sterilization process is performed through physical and microbiological studies, and set of established physical process parameters. Maintaining the physical process parameters in subsequent sterilization cycles will consistently yield the desired sterility assurance level without having to test the devices for sterility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.