Process challenge device and method
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United States of America Patent
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Nov 25, 2003
Grant Date -
N/A
app pub date -
Aug 24, 1999
filing date -
Jul 29, 1996
priority date (Note) -
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Abstract
A process challenge device tailored to mimic the resistance of a particular product-package combination to a particular biological inactivation, disinfection, or sterilization process. The device is used to challenge the process, thus providing a means to validate the efficacy of the process. In one embodiment, the process indicator includes a biological indicator organism stored on a carrier enclosed within a chamber formed by a barrier film material. The specific indicator organism and carrier substrate are chosen for their appropriateness for a given process. The materials comprising the barrier film material of the process challenge device are chosen for the materials' specific resistance to the given process. The process challenge device may also comprise a separate second chamber filled with an appropriate culture medium or enzyme substrate that is separated from the chamber containing the process indicator by a separation means, such as a valve, a clip, or a frangible separation. The separation means between the two chambers is capable of being removed on demand after completion of the process thus allowing the culture medium or enzyme substrate to contact the process indicator.
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