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Method for testing a filter in a dialysis system

  • US 5,808,181 A
  • Filed: 08/29/1996
  • Issued: 09/15/1998
  • Est. Priority Date: 09/16/1995
  • Status: Expired due to Term
First Claim
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1. A method for testing at least one filter arranged in a dialysis solution system of an extracorporeal blood treatment apparatus, the filter being divided by a germ-retaining membrane into a first chamber and a second chamber, the method comprising steps of:

  • filling at least one branch of the dialysis solution system with an aqueous solution, the aqueous solution fully wetting the germ-retaining membrane of the filter,sealing off the one branch of the dialysis solution system from remaining branches of the dialysis solution system, wherein the one branch houses the first chamber of the filter,conducting gas into the one branch of the dialysis solution system housing the first chamber to expel fluid through the germ-retaining membrane of the filter,shutting off the supply of gas once a predetermined pressure is formed in the first chamber, andmonitoring a rate of change of pressure in the first chamber of the filter to provide information on membrane integrity.

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