Portable ultrafiltration unit and device for supplying the ultrafiltration unit with dialysis fluid

• US 10,583,238 B2
• Filed: 07/26/2016
• Issued: 03/10/2020
• Est. Priority Date: 08/06/2015
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Deutschland GmbH (Fresenius Medical Care AG)
• Inventors: Peters, Arne
• Primary Examiner(s): Fortuna, Ana M
• Application Number:
  US15/746,014
• Publication Number:
  US 20180207345A1
• Time in Patent Office: 1,323 Days
• Field of Search: None
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1635 with volume chamber balancing devices between used and fresh dialysis fluid
• CPC Class Codes: A61M 1/1672 using membrane filters, e.g. for sterilising the dialysate
• CPC Class Codes: A61M 1/34 Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration
• CPC Class Codes: A61M 1/3413 Diafiltration
• CPC Class Codes: A61M 1/3417 using distinct filters for dialysis and ultra-filtration
• CPC Class Codes: A61M 1/3482 by filtrating the filtrate using another cross-flow filter, e.g. a membrane filter
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2209/088 on the body

Abstract

The invention relates to a portable ultrafiltration unit A which comprises a blood pump 7 for conveying blood and an ultrafiltration pump 6 for conveying ultrafiltrate. The invention further relates to a stationary device B for supplying dialysate to the portable ultrafiltration unit A, and to a medical treatment system which comprises an ultrafiltration unit and a device for supplying dialysate to the ultrafiltration unit. The ultrafiltration unit according to the invention is in the form of a unit to be connected to a stationary device for supplying dialysate to the ultrafiltration unit, in such a way that a fluid connection can be established for feeding in fresh dialysate and removing used dialysate. As a result, the ultrafiltration unit can not only be used for ultrafiltration, but also, when used in conjunction with the stationary device for supplying dialysate to the ultrafiltration unit, for a blood treatment as carried out by a conventional blood treatment device. It is merely necessary to connect the ultrafiltration unit A to the device B for supplying dialysate to the ultrafiltration unit. There is no need to detach the patient connections 27A, 27B of the venous and arterial blood lines 27, 28 or to attach said connections to the patient, as result of which the preparation time for a blood treatment can be reduced.

Claims

1. A portable ultrafiltration unit comprising a first pump that is a blood pump for conveying blood, a second pump that is an ultrafiltration pump for conveying ultrafiltrate, a first dialysate connection line, a second dialysate connection line, a first line portion that branches off the first dialysate connection line and is in fluid communication with the second pump, and a second line portion that branches off the second dialysate connection line and is in fluid communication with the second pump, wherein the first dialysate connection line is in fluid communication with the second pump via the first line portion, the second dialysate connection line is in fluid communication with the second pump via the second line portion, the portable ultrafiltration unit is in the form of a unit (A) to be connected to a stationary device (B) for supplying dialysate to the ultrafiltration unit such that a fluid connection can be established for feeding in fresh dialysate and removing used dialysate so that a dialysis treatment can be carried out using the ultrafiltration unit, and the ultrafiltration unit is in the form of a unit to be worn on the patient'"'"'s body by means of straps.

2. The portable ultrafiltration unit according to claim 1, wherein the ultrafiltration unit (A) comprises a first dialysate connection in fluid communication with the first dialysate connection line for feeding fresh dialysate and a second dialysate connection in fluid communication with the second dialysate connection line for removing used dialysate.

3. The portable ultrafiltration unit according to claim 1, wherein the ultrafiltration unit (A) comprises a first filter connection for an inlet of a first chamber of a filter, which is divided into the first chamber and a second chamber by a semipermeable membrane, and a second filter connection for an outlet of the first chamber of the filter, and comprises a third filter connection for an inlet of the second chamber of the filter and a fourth filter connection for an outlet of the second chamber of the filter.

4. The portable ultrafiltration unit according to claim 3, wherein the first dialysate connection line connects the first dialysate connection to the third filter connection, and the second dialysate connection line connects the second dialysate connection to the fourth filter connection.

5. The portable ultrafiltration unit according to claim 4, wherein an ultrafiltrate line portion which leads to the inlet of the ultrafiltration pump is in fluid communication with the third filter connection and/or an ultrafiltrate line portion which leads to the inlet of the ultrafiltration pump is in fluid communication with the fourth filter connection, an ultrafiltrate line portion which leads to a container for holding ultrafiltrate being connected to the outlet of the ultrafiltration pump.

6. The portable ultrafiltration unit according to claim 4, wherein the ultrafiltration unit (A) comprises a first blood line leading to the first filter connection for feeding blood into the first chamber of the filter and a blood line leading away from the second filter connection for removing blood from the first chamber of the filter.

7. The portable ultrafiltration unit according to claim 3, wherein an ultrafiltrate line leads to a container for holding ultrafiltrate and is connected to an outlet of the ultrafiltration pump.

8. The portable ultrafiltration unit according to claim 3, wherein the ultrafiltration unit (A) comprises a first blood line leading to the first filter connection for feeding blood into the first chamber of the filter and a blood line leading away from the second filter connection for removing blood from the first chamber of the filter.

9. The portable ultrafiltration unit according to claim 2, wherein the ultrafiltration unit (A) comprises a first filter connection for an inlet of a first chamber of a filter, which is divided into the first chamber and a second chamber by a semipermeable membrane, and a second filter connection for an outlet of the first chamber of the filter, and comprises a third filter connection for an inlet of the second chamber of the filter and a fourth filter connection for an outlet of the second chamber of the filter.

10. The portable ultrafiltration unit according to claim 1, wherein the ultrafiltration unit (A) comprises a control unit for the blood pump and the ultrafiltration pump.

11. The portable ultrafiltration unit according to claim 1, wherein the control unit comprises electrical connections for producing an electrical connection between the control unit of the ultrafiltration unit (A) and a control unit of the device (B) for supplying dialysate to the ultrafiltration unit.

12. The portable ultrafiltration unit according to claim 1, wherein the ultrafiltration unit (A) comprises a user interface.

13. The portable ultrafiltration unit according to claim 1, wherein the ultrafiltration unit (A) comprises a carrier unit which houses the blood pump and the ultrafiltration pump.

14. A device for supplying dialysate to the portable ultrafiltration unit according to claim 1, comprising an apparatus for providing fresh dialysate, an apparatus for removing used dialysate, and a balancing unit for balancing fresh and used dialysate, wherein the device (B) for supplying the ultrafiltration unit (A) is designed such that a fluid connection can be established for feeding fresh dialysate to the ultrafiltration unit and removing used dialysate from the ultrafiltration unit so that a dialysis treatment can be carried out using the ultrafiltration unit.

15. The device according to claim 14 for supplying dialysate to the ultrafiltration unit (A), wherein the device (B) comprises a docking station for establishing a fluid connection for feeding fresh dialysate to the ultrafiltration unit (A) and removing used dialysate from the ultrafiltration unit.

16. The device according to claim 15 for supplying dialysate to the ultrafiltration unit (A), wherein the device (B) is in the form of a device for extracorporeal blood treatment which comprises an extracorporeal blood circuit and a dialysate system.

17. The device according to claim 14 for supplying dialysate to the ultrafiltration unit, wherein the device (B) is in the form of a device for extracorporeal blood treatment which comprises an extracorporeal blood circuit and a dialysate system.

18. A medical treatment system comprising the portable ultrafiltration unit (A) according to claim 1 and a device (B) for supplying the ultrafiltration unit (A), where the medical system is designed such that a fluid connection can be established for feeding fresh dialysate to the ultrafiltration unit (A) and removing used dialysate from the ultrafiltration unit (A) so that a dialysis treatment can be carried out using the ultrafiltration unit (A).

19. The portable ultrafiltration unit according to claim 1, further comprising a battery configured for battery-powered operation of the ultrafiltration unit.