Portable artificial kidney
First Claim
Patent Images
1. A portable diafiltration system for use as an artificial kidney in the circulating blood stream of a living being comprising:
- (a) catheter filter means adapted to be inserted into the circulating blood stream members of said living being for obtaining a continuous flow of filtered liquid, said catheter filter means including;
(i) a solid body portion having a least three ducts therein, each said ducts having an opening communicating with the surface of said body portion for providing a liquid flow path thereto;
(ii) a semi-permeable membrane means circumscribing part of said body portion and covering at least two of said duct openings for filtering said blood stream and providing a filtrate;
(b) suction means operatively coupled to the first of said membrane covered ducts for drawing off said filtrate;
(c) reservoir means operatively coupled to said suction means and communicating with the uncovered duct, said reservoir means discharging its contents into said uncovered duct in an amount essentially equal to the amount of said filtrate received into said reservoir via said first membrane covered duct; and
(d) means operatively coupled to and communicating with the second membrane covered duct for supplying a liquid to the surface of said filter membrane in contact with said body portion.
0 Assignments
0 Petitions
Accused Products
Abstract
A portable artificial kidney designed for continuous use includes a catheter with filter properties. The body portion of the catheter has an infusion duct which opens into the surface of the catheter and is provided with surface channels which are covered by a semi-permeable membrane. Ducts are provided which communicate with the channels. One duct is operatively coupled to a suction pump to remove the filtrate. Another duct serves to supply a rinsing solution and the infusion duct serves to replace the liquid which has been filtered off.
107 Citations
9 Claims
-
1. A portable diafiltration system for use as an artificial kidney in the circulating blood stream of a living being comprising:
-
(a) catheter filter means adapted to be inserted into the circulating blood stream members of said living being for obtaining a continuous flow of filtered liquid, said catheter filter means including; (i) a solid body portion having a least three ducts therein, each said ducts having an opening communicating with the surface of said body portion for providing a liquid flow path thereto; (ii) a semi-permeable membrane means circumscribing part of said body portion and covering at least two of said duct openings for filtering said blood stream and providing a filtrate; (b) suction means operatively coupled to the first of said membrane covered ducts for drawing off said filtrate; (c) reservoir means operatively coupled to said suction means and communicating with the uncovered duct, said reservoir means discharging its contents into said uncovered duct in an amount essentially equal to the amount of said filtrate received into said reservoir via said first membrane covered duct; and (d) means operatively coupled to and communicating with the second membrane covered duct for supplying a liquid to the surface of said filter membrane in contact with said body portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification