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Liquid carbon dioxide cleaning using agitation enhancements at low temperature

  • US 6,264,753 B1
  • Filed: 07/07/2000
  • Issued: 07/24/2001
  • Est. Priority Date: 01/07/1998
  • Status: Expired due to Term
First Claim
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1. A liquid carbon dioxide cleaning method embodied in a system having a cleaning chamber, said cleaning method comprising the steps of:

  • providing a cleaning chamber;

    disposing vigorous agitation apparatus within the cleaning chamber;

    introducing liquid carbon dioxide from a storage tank to the cleaning chamber through said vigorous agitation apparatus;

    disposing a medical device in the cleaning chamber having one or more surfaces on which bio-burden is disposed; and

    forcing the liquid carbon dioxide out of the vigorous agitation apparatus at a temperature that is below 32°

    F. to solidify the bio-burden disposed on the one or more surfaces and remove the bio-burden from the one or more surfaces, and disperse and suspend the bio-burden in the liquid carbon dioxide for transport and removal from the cleaning chamber; and

    removing the medical device from the cleaning chamber.

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