Apparatus for disinfection of hemodialysis devices with a powdered concentrate

• US 5,304,349 A
• Filed: 10/22/1992
• Issued: 04/19/1994
• Est. Priority Date: 11/20/1991
• Status: Expired due to Term

• Current Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Original Assignee: Fresenius AG (Fresenius SE & Co. KGaA)
• Inventors: Polaschegg, Hans-Dietrich
• Primary Examiner(s): Housel, James C.
• Assistant Examiner(s): TRAN, LIEN THUY
• Application Number:
  US07/966,098
• Time in Patent Office: 544 Days
• Field of Search: 422/292, 422/302, 422/103, 422/105, 422/102, 422/101, 422/99, 422/116
• US Class Current: 422/534
• CPC Class Codes: A61M 1/169 using chemical substances

Abstract

A hemodialysis device (10) which features an improved disinfection apparatus. Before disinfection begins, a container (30) of disinfectant (36) is interposed into the dialysis fluid circulation system in place of the dialyzer. The dialysis fluid circulation system is shunted, and the disinfecting solution which is present in this closed circulation system is flushed out of the container (30) and through the entire path of the dialysis fluid, in order to achieve a complete cleaning of the hemodialysis device (10). It is possible to use solid, soluble disinfectant (36) as well as liquid disinfectant.

Claims

1. Apparatus for dialysis (10) comprising water supply (11), dialysis fluid supply container (14), supply line (18) having a first end and a second end, the first end of said supply line (18) being connected to said dialysis fluid supply container (14), a first connector (20) mounted to the second end of said supply line (18), said second end of said supply line (18) being selectively connected to a dialyzer by means of said first connector (20), discharge line (22) having a first end and a second end, a second connector (24) mounted to the first end of said discharge line (22), said first end of said discharge line (22) being selectively connected to said dialyzer by means of said second connector (24), said second end of said discharge line (22) leading to discharge line (28), and disinfection apparatus connected during disinfection cycle both to said dialysis fluid supply container (14) through said supply line (18) and to discharge line (22), said discharge line (22) can be selectively connected to supply container (14) through a recirculating line (58) to permit recirculating operation, wherein during said disinfection cycle a bypass valve (61) in said supply line (18) can be selectively activated through a connecting line (65) to allow for disinfection of the entire dialysis apparatus characterized in that:

(a) said disinfection apparatus comprises container (30) having a first end and a second end to hold a predetermined quantity of disinfectant (36),

(b) a third connector (32) mounted to said container (30) at the first end thereof and connected in fluid-tight relationship to said first connector (20) at the second end of said supply line (18),

(c) a fourth connector (34) mounted to said container (30) at the second end thereof and connected in fluid-tight relationship to said second connector (24) at the first end of said discharge line (22).

2. Apparatus as in claim 1, further characterized in that said third connector (32) and fourth connector (34) are DIN (German Industrial Standard) type 58 352 connectors.

3. Apparatus as in claim 1, further characterized in that said container (30) has fill opening (46) which can be closed by cover (48) and which permits refilling with a dose of disinfectant (36).

4. Apparatus as in claim 1, further characterized in that filter (38) is provided in said container (30) adjacent said fourth connector 34, and said container (30) holds disinfectant (36) in the form of a powder.

5. Apparatus as in claim 1, further characterized in that:

(a) valve (40) is provided in the fluid circuit between said container (30) and said discharge line (22) adjacent said fourth connector (34) and is under fluid pressure in said fluid circuit to place the interior of said container (30) in communicating relationship with said discharge line,

(b) said container (30) holds said disinfectant (36) in the form of a liquid.

6. Apparatus as in claim 1, further characterized in that holder (50) and sensor (52) are mounted on a side of apparatus (10), said sensor (52) determines the positioning of said container (30) within said holder (50).

7. Apparatus as in claim 1, further characterized in that a first contact sensor (54) is mounted to said first connector (20), and a second contact sensor (56) is mounted to said second connector (24), said first contact sensor (54) monitoring the connection between said first connector (20) and said third connector (32) to insure a fluid-tight connection therebetween, said second contact sensor (56) monitoring the connection between said second connector (24) and said fourth connector (34) to insure a fluid-tight connection therebetween.

8. Apparatus as in claim 1, further characterized in that said supply line (18), said discharge line (22) and said dialysis fluid supply container (14) are connected to one another by said recirculation line (58), and valve means (59) is interposed in the fluid circuit between said recirculation line (58) and said discharge line (22) to permit fluid flow from said discharge line (22) to discharge line (28) or selectively to permit fluid flow from discharge line (22) to said recirculation line (58).

9. Apparatus as in claim 1, further characterized in that said disinfectant (36) is citric acid and is present in said container (30) in a concentration of 5-30 grams per liter of the volume of apparatus (10) to be disinfected.

10. Apparatus as in claim 1, further characterized in that said disinfectant (36) in said container (30) is selected from the group consisting of solutions of peracetic acid, formaldehyde and sodium hypochlorite.

11. Apparatus as in claim 1, further characterized in that flow of said disinfectant (36) through said container (30) is from top to bottom thereof.

12. Apparatus as in claim 11, further characterized in that the flow of said disinfectant (36) through said container (30) is continuous.

13. Apparatus as in claim 11, further characterized in that flow of said disinfectant (36) through said container (30) is from bottom to top thereof.

14. Apparatus as in claim 13, further characterized in that the flow of said disinfectant (36) through said container (30) is continuous.

15. A container (30) adapted to contain disinfectant (36) for disinfecting a hemodialysis apparatus (10) during a disinfecting cycle operation thereof, said hemodialysis apparatus having a first connector (20), a second connector (24), a supply line (18), a discharge line (22), a recirculating line (58) and a fluid supply container (14), said container comprising:

(a) storage volume therein adequate to contain a predetermined quantity of said disinfectant (36) sufficient for disinfecting said hemodialysis apparatus (10) during one disinfecting cycle operation thereof,

(b) a first end and a second end on said container,

(c) a third connector (32) mounted to said container (30) at the first end thereof and to be connected in fluid-tight relationship to said first connector (20) prior to commencement of said disinfecting cycle of said hemodialysis apparatus (10) and to be disconnected from said first connector (20) after completion of said disinfecting cycle,

(d) a fourth connector (34) mounted to said container (30) at the second end thereof and be connected in fluid-tight relationship to said second connector (24) prior to commencement of said disinfecting cycle of said hemodialysis apparatus (10) and to be disconnected from said second connector (24) after completion of said disinfecting cycle,

(e) whereby, in said disinfecting cycle, said disinfectant (36) flows through said container (30) from said first end of said container (30) to said second end thereof and is circulated through said supply line (18), said discharge line (22), said recirculating line (58) and said fluid supply container (14) of said hemodialysis apparatus.

16. Container (30) as in claim 15, wherein:

(f) said first end of said container (30) is at the top thereof,

(g) said second end of said container (30) is at the bottom thereof,

(h) said disinfectant (36) flows through said container (30) from said first end of said container (30) to said second end thereof.

17. Container (30) as in claim 15, wherein:

(f) said first end of said container (30) is at the top thereof,

(g) said second end of said container (30) is at the bottom thereof,

(h) said disinfectant (36) flows through said container (30) from said first end of said container (30) to said second end thereof.

18. Container (30) as in claim 15, further comprising:

(f) fill opening (46) for introducing solid or liquid disinfectant (36) into said container (30),

(g) cover (48) removably positioned over said fill opening (46).

19. Container (30) as in claim 15, further comprising:

(f) filter (38) mounted within said container (30) and interposed between the first and second ends thereof.

20. Container as in claim 15, further comprising:

(f) non-return valve (40) mounted adjacent said fourth connector (34) to be opened under fluid pressure to place the interior of said container (30) in communicating relationship with said fourth connector (34).