ARTIFICIAL KIDNEY

• US 3,799,873 A
• Filed: 07/09/1971
• Issued: 03/26/1974
• Est. Priority Date: 04/19/1968
• Status: Expired due to Term

• Current Assignee: Brown C
• Original Assignee: Brown C
• Inventors: BROWN C
• Application Number:
  US05/161,864
• Time in Patent Office: 991 Days
• US Class Current: 210/641
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/281 Instillation other than by gravity
• CPC Class Codes: A61M 1/3448 by mechanically linked pumps in both ultra-filtrate and substitution flow line
• CPC Class Codes: A61M 1/3482 by filtrating the filtrate using another cross-flow filter, e.g. a membrane filter
• CPC Class Codes: B01D 61/243 Dialysis
• CPC Class Codes: B01D 61/28 Apparatus therefor
• CPC Class Codes: B01D 61/46 Apparatus therefor
• CPC Class Codes: B01D 63/087 Single membrane modules
• CPC Class Codes: B01D 71/16 Cellulose acetate
• CPC Class Codes: Y10S 210/929 Hemoultrafiltrate volume measurement or control processes

Abstract

AN EXTRA-CORPOREAL DEVICE EMPLOYING DIALYSIS AND FILTRATION MEANS PERFORMS THE FUNCTION OF A NATURAL KIDNEY. IN THE DEVICE, A BODILY FLUID SUCH AS PERITIONAL FLUID OR ARTERIAL BLOOD IS WITHDRAWN FROM THE BODY AND PASSED THROUGH A DIALIZER THAT CAUSES SELECTIVE DIFFUSION OF TOXIC, LOW MOLECULAR WEIGHT SOLUTES INTO A WATER-CONTAINING DIALYSATE, THE DIALYSATE AND SOLUTES ARE THEN PASSED THROUGH A FILTRATION MEANS OR COMBINATION OF FILTRATION AND ELECTRODIALZING MEANS THAT PERMIT ONLY THE PASSAGE OF PURE WATER OR PURE WATER DISSOLVED ELECTROLYTES WHILE RETAINING THE LOW MOLECULAR WEIGHT TOXIC SOLUTES. THE PURIFIED FILTRATE FROM THE FILTRATION MEANS IS RECYCLED AND COMBINED WITH A CONTROLLED AMOUNT OF MAKE-UP ELECTROLYTE SOLUTION AS THE DIALYSATE FOR THE DIALYZER AND THE UNFILTERED RESIDUE FROM THE FILTRATION MEANS IS DISCHARGE AS WASTE THE PERITONEAL FLUID OR BLOOD IN TRANSIT THROUGH THE DIALYZER IS THUS CLEANED OF TOXIC SUBSTANCES AND IS SUITABLE FOR RETURN.

Claims