Wearable, portable, light-weight artificial kidney

• US 5,284,470 A
• Filed: 11/02/1992
• Issued: 02/08/1994
• Est. Priority Date: 11/02/1992
• Status: Expired due to Fees

• Current Assignee: Alex D. Beltz
• Original Assignee: Alex D. Beltz
• Inventors: Beltz, Alex D.
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): Nguyen, Dinh X.
• Application Number:
  US07/970,041
• Time in Patent Office: 463 Days
• Field of Search: 604/4, 604/5, 604/6, 604/7, 604/8, 210/321.71, 210/433.1, 210/645, 210/646, 210/929, 623/11, 623/66, 623/12, 422/44, 422/48, 436/177, 436/178
• US Class Current: 604/4.01
• CPC Class Codes: A61M 1/3472 with treatment of the filtrate
• CPC Class Codes: A61M 1/3486 Biological, chemical treatment, e.g. chemical precipitation; treatment by absorbents
• CPC Class Codes: A61M 2202/0078 changed by chemical action
• CPC Class Codes: A61M 2202/0415 Plasma
• CPC Class Codes: A61M 2209/088 on the body
• CPC Class Codes: Y10S 210/929 Hemoultrafiltrate volume measurement or control processes

Abstract

A portable artificial kidney in the form of a self-contained unit whose size and shape is such that it is light-weight and relatively small. It can be worn or attached to a patient in such a manner that it will not interfere with normal physical activities. The artificial kidney has a blood plasma separator unit that receives impure whole blood from the body of a patient and it separates a predetermined amount of plasma therefrom and returns the remainder of the blood back to the patients body. The separated plasma is then transmitted through a chemical treatment unit where the contaminated plasma is relieved of uric acid, creatinine, phosphate, and ammonium ions. The detoxified plasma is then transmitted to a water removal unit and then the detoxified plasma is returned to the patients circulatory system.

Claims

1. A wearable, portable, light-weight artificial kidney comprising:

a first means for transmitting impure whole blood from a body of a patient to an artificial kidney;

a separator means configured to separate a predetermined amount of plasma from said whole blood and a second whole means for returning a remainder of said blood with some of the plasma removed back to the patient'"'"'s body;

a means configured to chemically treat and cleanse the plasma that has been separated from the whole blood;

a means configured to remove water from the plasma that has been separated from the whole blood;

a third means configured to return the cleansed plasma to the patient'"'"'s body; and

wherein said artificial kidney is shaped and sized to be completely worn daily on the body of the patient and weighs less than 15 pounds.

2. A wearable, portable, light-weight artificial kidney as recited in claim 1 further comprising an arterial venous shunt that is detachably interconnected to said first means, said second means and said third means.

3. A wearable, portable, light-weight artificial kidney as recited in claim 2 wherein said arterial venous shunt is configured to be surgically implanted in the body of the patient.

4. A wearable, portable, light-weight artificial kidney as recited in claim 1 wherein said artificial kidney is in the form of a unit that is part of a belt that is sized and shaped to be worn by a patient.

5. A wearable, portable, light-weight artificial kidney as recited in claim 1 wherein said separator means comprises a packet housing having a predetermined length of polycarbonate tubing having holes in side walls of said tubing in a range of 0.4--3.0 microns through which plasma passes, said polycarbonate tubing passing concentrically through an interior of a conventional medically approved blood tubing.

6. A wearable, portable, light-weight artificial kidney as recited in claim 5 wherein said concentrically positioned polycarbonate tubing is formed in a convoluted shape that extends from an inlet end of said separator pack housing to an outlet end.

7. A wearable, portable, light-weight artificial kidney as recited in claim 5 wherein said medically approved blood tubing has an inner surface treated with urease.

8. A wearable, portable, light-weight artificial kidney as recited in claim 1 wherein said means for chemically treating and cleansing the plasma that has been separated from the whole blood comprises a packet housing having a predetermined length of tubing through which said plasma passes, said tubing having an inner surface coated with predetermined adsorbents for removing toxics from said plasma.

9. A wearable, portable, light-weight artificial kidney as recited in claim 1 wherein said means for removing water from the plasma that has been separated from the whole blood comprises a packet housing having a predetermined length of polycarbonate tubing having holes in its side walls in the range of 0.45 microns or less through which water passes, the interior of said packet having predetermined desiccants that absorb water.

10. A wearable, portable, light-weight artificial kidney comprising:

a first means for transmitting impure whole blood from a body of a patient to an artificial kidney;

a separator means configured to continuously and non-cyclically separate a predetermined amount of plasma from said whole blood and a second whole means for continuously and non-cyclically returning a remainder of said blood with some of the plasma removed back to the patient'"'"'s body;

a means configured to continuously and non-cyclically chemically treat and cleanse the plasma that has been separated from the whole blood;

a third means configured to continuously and non-cyclically return the cleansed plasma to the patient'"'"'s body, wherein said artificial kidney is shaped and sized to be completely worn daily on the body of the patient.

11. A wearable, portable, light-weight artificial kidney as recited in claim 10 further comprising an arterial venous shunt that is detachably interconnected to said first means, said second means and said third means.

12. A wearable, portable, light-weight artificial kidney as recited in claim 11 wherein said arterial venous shunt is configured to be surgically implanted in the body of the patient.

13. A wearable, portable, light-weight artificial kidney as recited in claim 10 wherein said artificial kidney is in the form of a unit that is part of a belt that is sized and shaped to be worn by a patient.

14. A wearable, portable, light-weight artificial kidney as recited in claim 10 wherein said artificial kidney is shaped and sized to be completely worn on the body of the patient and weighs less than 15 pounds.

15. A wearable, portable, light-weight artificial kidney as recited in claim 10 wherein said separator means comprises a packet housing having a predetermined length of polycarbonate tubing having holes in side walls of said tubing in a range of 0.4-3.0 microns through which plasma passes, said polycarbonate tubing passing concentrically through an interior of a conventional medically approved blood tubing.

16. A wearable, portable, light-weight artificial kidney as recited in claim 15 wherein said concentrically positioned polycarbonate tubing is formed in a convoluted shape that extends from an inlet end of said separator pack housing to an outlet end.

17. A wearable, portable, light-weight artificial kidney as recited in claim 15 wherein said medically approved blood tubing has an inner surface treated with urease.

18. A wearable, portable, light-weight artificial kidney as recited in claim 10 wherein said means for chemically treating and cleansing the plasma that has been separated from the whole blood comprises a packet housing having a predetermined length of tubing through which said plasma passes, said tubing having an inner surface coated with predetermined adsorbents for removing toxics from said plasma.

19. A wearable, portable, light-weight artificial kidney as recited in claim 10 wherein said means for removing water from the plasma that has been separated from the whole blood comprises a packet housing having a predetermined length of polycarbonate tubing having holes in its side walls in the range of 0.45 microns or less through which water passes, the interior of said packet having predetermined desiccants that absorb water.

20. A wearable, portable, light-weight artificial kidney comprising:

a first means for transmitting impure whole blood from a body of a patient to an artificial kidney;

a separator means configured to separate at substantially normal blood pressure a predetermined amount of plasma from said whole blood and a second whole means for returning at substantially normal blood pressure a remainder of said blood with some of the plasma removed back to the patient'"'"'s body;

a means configured to chemically treat and cleanse the plasma that has been separated from the whole blood; and

a third means configured to return at substantially normal blood pressure the cleansed plasma to the patient'"'"'s body, wherein said artificial kidney is shaped and sized to be completely worn daily on the body of the patient.

21. A wearable, portable, light-weight artificial kidney as recited in claim 20 further comprising an arterial venous shunt that is detachably interconnected to said first means, said second means and said third means.

22. A wearable, portable, light-weight artificial kidney as recited in claim 21 wherein said arterial venous shunt is configured to be surgically implanted in the body of the patient.

23. A wearable, portable, light-weight artificial kidney a recited in claim 20 wherein said artificial kidney is in the form of a unit that is part of a belt that is sized and shaped to be worn by a patient.

24. A wearable, portable, light-weight artificial kidney as recited in claim 20 wherein said artificial kidney is shaped and sized to be completely worn daily on the body of the patient and weighs less than 15 pounds.

25. A wearable, portable, light-weight artificial kidney as recited in claim 20 wherein said separator means comprises a packet housing having a predetermined length of polycarbonate tubing having holes in side walls of said tubing in a range of 0.4-3.0 microns through which plasma passes, said polycarbonate tubing passing concentrically through an interior of a conventional medically approved blood tubing.

26. A wearable, portable, light-weight artificial kidney as recited in claim 25 wherein said concentrically positioned polycarbonate tubing is formed in a convoluted shape that extends from an inlet end of said separator pack housing to an outlet end.

27. A wearable, portable, light-weight artificial kidney as recited in claim 25 wherein said medically approved blood tubing has an inner surface treated with urease.

28. A wearable, portable, light-weight artificial kidney as recited in claim 20 wherein said means for chemically treating and cleansing the plasma that has been separated from the whole blood comprises a packet housing having a predetermined length of tubing through which said plasma passes, said tubing having an inner surface coated with predetermined adsorbents for removing toxics from said plasma.

29. A wearable, portable, light-weight artificial kidney as recited in claim 20 wherein said means for removing water from the plasma that has been separated from the whole blood comprises a packet housing having a predetermined length of polycarbonate tubing having holes in its side walls in the range of 0.45 microns or less through which water passes, the interior of said packet having predetermined desiccants that absorb water.