Dialysis systems, components, and methods

• US 9,919,091 B2
• Filed: 08/26/2016
• Issued: 03/20/2018
• Est. Priority Date: 08/04/2009
• Status: Active Grant

• Current Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Original Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius Medical Care AG)
• Inventors: Beiriger, Michael James, Parks, Robert Dale, Kaintz, Ryan Christopher
• Primary Examiner(s): BASS, DIRK R
• Application Number:
  US15/248,688
• Publication Number:
  US 20160361483A1
• Time in Patent Office: 571 Days
• Field of Search: 210143, 210175, 210232, 2103216, 2102571, 210646, 604 28, 604 29
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/1605 Physical characteristics of the dialysate fluid
• CPC Class Codes: A61M 1/1629 with integral heat exchanger
• CPC Class Codes: A61M 1/1694 with recirculating dialysing liquid
• 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 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 2205/3317 Electromagnetic, inductive or dielectric measuring means
• CPC Class Codes: A61M 2205/3324 PH measuring means
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/3365 Rotational speed
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: A61M 2205/3379 Masses, volumes, levels of fluids in reservoirs, flow rates
• CPC Class Codes: A61M 2205/3393 by weighing the reservoir
• CPC Class Codes: A61M 2205/50 with microprocessors or computers

Abstract

A dialysis system including a housing, a dialysate pump disposed in the housing, and a dialysate line configured to be operatively connected to the dialysate pump such that the dialysate pump can pump dialysate through the dialysate line when the dialysate line is in fluid communication with a dialysate source.

Claims

1. A dialysis system, comprising:

a first dialysate pump disposed above a cavity of a housing;

a slidable drawer defining a recess configured to receive the first dialysate pump, the drawer being at least partially disposed within the cavity in a manner such that when the drawer is moved to a closed position within the cavity, a member of the drawer is lifted towards the first dialysate pump positioned above the cavity;

a dialysate line secured to a dialysate component carrier that is configured to be supported by the member of the drawer, the dialysate line extending across an aperture that is defined by the dialysate component carrier and that is configured to receive the first dialysate pump, such that when the drawer is moved to the closed position and the member of the drawer is lifted towards the first dialysate pump, the first dialysate pump is received in the aperture and deflects the dialysate line into the recess of the slidable drawer such that the first dialysate pump can pump dialysate through the dialysate line;

a sorbent device;

a dialysate reservoir fluidly connected to the sorbent device and arranged to collect dialysate exiting the sorbent device; and

a second dialysate pump in fluid communication with the sorbent device, positioned upstream of the sorbent device, and configured to introduce dialysate into the sorbent device;

wherein the first dialysate pump is in fluid communication with the dialysate reservoir, is positioned downstream of the sorbent device, and is configured to draw dialysate out of the dialysate reservoir.

2. The dialysis system of claim 1, wherein the sorbent device is absorbent.

3. The dialysis system of claim 1, wherein the dialysate reservoir is vented to atmosphere.

4. The dialysis system of claim 1, wherein the first dialysate pump is adapted to draw fluid from the dialysate reservoir at substantially the same rate that the second dialysate pump introduces dialysate into the sorbent device.

5. The dialysis system of claim 1, further comprising a connector line that fluidly connects the sorbent device to the dialysate reservoir.

6. The dialysis system of claim 5, wherein one end of the connector line is connected to a top region of the sorbent device, and another end of the connector line is connected to a top region of the dialysate reservoir.

7. The dialysis system of claim 1, wherein the sorbent device and the dialysate reservoir sit on a weight scale.

8. The dialysis system of claim 7, further comprising a microprocessor connected to the scale and the first and second dialysate pumps.

9. The dialysis system of claim 8, wherein the microprocessor is adapted to control the first and second dialysate pumps in a manner so as to maintain a substantially constant weight on the scale.