DUAL-VENTRICLE PUMP CARTRIDGE, PUMP, AND METHOD OF USE IN A WEARABLE CONTINUOUS RENAL REPLACEMENT THERAPY DEVICE

• US 20110142700A1
• Filed: 11/15/2010
• Published: 06/16/2011
• Est. Priority Date: 11/16/2001
• Status: Abandoned Application

• Current Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius SE & Co. KGaA)
• Original Assignee: Fresenius Medical Care Holdings Incorporated (Fresenius SE & Co. KGaA)
• Inventors: Gura, Victor, Rambod, Edmond
• Application Number:
  US12/946,590
• Publication Number:
  US 20110142700A1
• Time in Patent Office: Days
• US Class Current: 417/474
• CPC Class Codes: A61M 1/1645 with mechanically linked peristaltic dialysis fluid pumps one upstream, the other one downstream of the dialyser
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: A61M 1/3472 with treatment of the filtrate
• CPC Class Codes: A61M 1/3672 Means preventing coagulation
• CPC Class Codes: A61M 2205/3389 Continuous level detection A61M2205/3393 takes precedence
• CPC Class Codes: A61M 2205/8206 battery-operated
• CPC Class Codes: A61M 2205/8212 with means or measures taken for minimising energy consumption
• CPC Class Codes: A61M 2205/8237 Charging means
• CPC Class Codes: A61M 2209/088 on the body
• CPC Class Codes: A61M 60/113 in other functional devices, e.g. dialysers or heart-lung machines
• CPC Class Codes: A61M 60/279 Peristaltic pumps, e.g. roller pumps
• CPC Class Codes: A61M 60/38 Blood oxygenation
• CPC Class Codes: A61M 60/443 with means converting the rotation into a translational movement of the displacement member
• CPC Class Codes: A61M 60/849 Disposable parts
• CPC Class Codes: A61M 60/851 Valves
• CPC Class Codes: F04B 43/082 the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism
• CPC Class Codes: F04B 43/086 with two or more tubular flexible members in parallel F04B43/1136 takes precedence
• CPC Class Codes: F04B 43/09 Pumps having electric drive

Abstract

A dual channel pulsatile pump for use with a completely wearable renal replacement device is provided.

Claims

1. A dual channel pulsatile pump comprising:

a dual channel pump cartridge having a first channel and a second channel, each channel of said dual channel pump cartridge comprising;

a peristaltic tube that is compressible, said peristaltic tube having an input end and an output end;

an input valve at the input end, said input valve comprising an input o-ring, an input ball that seats against said input o-ring to stop fluid back flow through said input valve and an input spring member that positions said input ball against said input o-ring when the peristaltic tube is being compressed, said input spring member allows said input ball to move away from said input o-ring and allow forward fluid flow through said input valve when said peristaltic tube is being allowed to decompress; and

an output valve at said output end, said output valve comprising an output o-ring, an output ball that seats against said output o-ring to stop fluid back flow through said output valve and an output spring member that positions said output ball against said output o-ring when the peristaltic tube is being decompressed, said output spring member allows said output ball to move away from said output o-ring and allow forward fluid flow through said output valve when said peristaltic tube is being compressed; and

a pump motor portion comprising first oscillating pushing member for compressing and decompressing said peristaltic tube in a first channel and a second oscillating pushing member for compressing and decompressing said peristaltic tube in a second channel, said dual channel pump cartridge being removably attachable to said pump motor portion.

2. The dual channel pulsatile pump of claim 1, wherein said input spring member comprises:

an outer ring having a first diameter;

an inner ring having a second diameter that is smaller than said first diameter; and

a least two and not more than three spokes extending radially from said inner ring to said outer ring;

said inner ring being able to move laterally with respect to a plane extending perpendicular to an axis of said outer ring.

3. The dual channel pulsatile pump of claim 1, wherein said a dual channel pump cartridge dimensions are less than 0.72 inches high, 3.82 inches long, and 1.7 inches wide wherein each measurement is plus or minus 50 percent.

4. The dual channel pulsatile pump of claim 1, wherein the dual channel pulsatile pump has dimensions of 9.7×

7.1×

4.6 cm and a weight of less than 400 grams plus or minus 50%.

5. The dual channel pulsatile pump of claim 1, wherein said input spring member comprises an outer ring having a first diameter;

an inner ring having a second diameter that is smaller than said first diameter; and

a least two and not more than three spokes extending radially from said inner ring to said outer ring;

said inner ring being able to move laterally with respect to a plane extending perpendicular to an axis of said outer ring, said inner ring providing stabilization to said ball when fluid is flowing through said input valve.