Portable power dialysis machine

• US 8,349,174 B2
• Filed: 07/23/2008
• Issued: 01/08/2013
• Est. Priority Date: 07/23/2008
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Bedingfield, John A., Kienman, Richard E., Lauman, Brian C.
• Primary Examiner(s): Kim, John
• Application Number:
  US12/178,437
• Publication Number:
  US 20100022937A1
• Time in Patent Office: 1,630 Days
• Field of Search: 210/175, 210/184, 210/185, 210/186, 210/194, 210/252, 210/256, 210/257.1, 210/258, 210/321.6, 210/416.1, 604/4.01, 604/5.01, 604/6.09, 604/6.11, 604/6.13, 604/6.15, 604/6.16, 604/7, 604/27, 604/29
• US Class Current: 210/143
• CPC Class Codes: A61M 1/14 Dialysis systems; Artificial kidneys; Blood oxygenators semi-permeable membranes characterised by the material, manufacturing processes therefor B01D71/00; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
• CPC Class Codes: A61M 1/16 with membranes
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/284 Continuous flow peritoneal dialysis [CFPD]
• CPC Class Codes: A61M 1/3623 Means for actively controlling temperature of blood
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/8268 Fuel storage cells
• CPC Class Codes: A61M 2209/088 on the body

Abstract

A fuel-cell powered medical fluid processing machine or dialysis machine is disclosed. The machine is intended for remote or rural areas where standard household or utility power is not available or is subject to interruption. The fuel cell is powered by hydrogen or other source of protons, or may instead be powered by methanol or ethanol, such as a direct methanol fuel cell. The fuel cell may be operated directly, as in powering a portable, wearable dialysis device, or may be operated indirectly, to generate and store power in an electric power storage device of the medical fluid or dialysis device. The medical fluid processing machine or dialysis machine may include circuitry allowing for use by household or utility power while also including a fuel cell for use when other power is not available. A catalytic heater may be used to warm the dialysis fluid.

Claims

1. A portable, wearable dialysis machine for a patient, comprising:

a fuel cell, an alternating current (“

AC”

) power source, and a battery for powering the portable, wearable dialysis machine;

a pump powered by the fuel cell, the AC power source, or the battery for pumping dialysis fluid in a fluid circuit;

a particulate filter placed in the fluid circuit;

a replaceable cartridge in the fluid circuit for absorbing waste products; and

a controller configured so that

(i) if the AC power source is available, the AC power source charges the battery and powers the portable, wearable dialysis machine, including the pump; and

(ii) if the AC power source is not available

(a) if the fuel cell is in an operational state, the fuel cell charges the battery and powers the portable, wearable dialysis machine, including the pump; and

(b) if the fuel cell is not in an operational state, the battery powers the fuel cell to an operational state and powers the portable, wearable dialysis machine, including the pump, until the fuel cell is in an operational state.

2. The portable, wearable dialysis machine of claim 1, further comprising an antibacterial filter in the fluid circuit and upstream of an access device connected to the patient.

3. The portable, wearable dialysis machine of claim 1, wherein the patient connects to the fluid circuit with a single lumen access device or a double-lumen access device.

4. The portable, wearable dialysis machine of claim 1, wherein the fuel cell is a direct methanol or ethanol fuel cell.

5. The portable, wearable dialysis machine of claim 1, wherein the dialysis machine is a hemodialysis machine, and further comprising a container for the dialysis fluid, a dialyzer, a second pump powered by the fuel cell, and tubing connecting the dialysis fluid container to the fluid circuit and the dialyzer, and blood line tubing connecting the patient to the second pump and the dialyzer and returning to the patient.

6. The portable, wearable dialysis machine of claim 1, wherein the dialysis machine is a peritoneal dialysis machine.

7. The portable, wearable dialysis machine of claim 1, further comprising a catalytic heater for warming the dialysis fluid for the patient.

8. The portable, wearable dialysis machine of claim 7, wherein the catalytic heater is an in-line catalytic heater, the in-line catalytic heater in operable communication with the controller.

9. The portable, wearable dialysis machine of claim 1, further including a capacitor capable of storing electricity.

10. The portable, wearable dialysis machine of claim 1, further including a heating element for heating the dialysis fluid, wherein if the AC power source powers the portable, wearable dialysis machine, the AC power source powers the heating element without using an AC to DC converter, and if the fuel cell powers the heating element, the fuel cell powers the heating element without using a DC to DC converter.

11. The portable, wearable dialysis machine of claim 10, which is configured such that if the heating element receives more power than necessary from the fuel cell, a switch inside the portable, wearable dialysis machine is opened to reduce the power to the heating element.