Artificial kidney

  • US 4,212,738 A
  • Filed: 03/23/1978
  • Issued: 07/15/1980
  • Est. Priority Date: 03/28/1977
  • Status: Expired due to Term
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First Claim
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1. A portable artificial kidney comprising a flexible hollow retentate chamber for the passage of blood formed by at least one dialysis membrane, and a flexible dialysate chamber formed by a jacket displaced outwardly and surrounding said at least one dialysis membrane, the volume of said retentate chamber being about 3 to 50 cm3 and the volume of said dialysate chamber being about 300 to 5,000 cm3 with the proviso that the volume of the dialysate chamber is at least about 40 times the volume of the retentate chamber, said dialysate chamber having at least one closable opening for filling or discharging a dialysate liquid and said retentate chamber having blood feed and outlet lines passed through said jacket in fluid-tight relationship, the combined dialysate and retentate chambers being sufficiently flexible to be conformed to a part of the human body and said dialysate chamber being only partially filled with dialysate liquid to provide a gas bubble which is sufficiently large to ensure liquid flow along the dialysis membrane with each natural movement of the body.

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