System for precision recharging of sorbent materials using patient and session data

Patent metadata

Field	Value
Publication number	US-11219880-B2
Application number	US-202016747859-A
Country	US
Kind code	B2
Filing date	Jan 21, 2020
Priority date	Nov 26, 2013
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

The invention relates to devices, systems, and methods for recharging zirconium phosphate and/or zirconium oxide in reusable sorbent modules. The devices, systems, and methods provide for precision recharging of the zirconium phosphate and/or zirconium oxide to avoid the need of excess recharge solutions. The devices systems and methods also provide for calculation of the volumes of recharge solution needed for fully recharging the zirconium phosphate and zirconium oxide modules.

First claim

We claim:

1. A system, comprising;
a recharging flow path; the recharging flow path comprising one or more recharge solution sources fluidly connectable to an inlet of a reusable sorbent module containing zirconium phosphate; the one or more recharge solution sources containing sodium chloride, sodium acetate, acetic acid, or combinations thereof;
at least one pump for pumping one or more recharge solutions from the one or more recharge solution sources through the sorbent module; and
a control system, the control system setting a volume and/or concentration of the one or more recharge solutions pumped through the sorbent module necessary to recharge the sorbent material within the sorbent module based on one or more patient parameters and/or one or more dialysis session parameters for a patient and/or a prior dialysis session using the sorbent module; and further based on a desired initial therapy zirconium phosphate effluent pH.

2. The system of claim 1 , wherein the one or more recharge solution sources comprise at least a first recharge solution source containing sodium chloride and a second recharge solution source containing acetic acid, sodium acetate, or a combination thereof.

3. The system of claim 1 , wherein the control system is programmed to pump between 5.0 and 6.0 millimoles of sodium in the one or more recharge solutions per total milliequivalents of total cations pumped through the sorbent module during the prior dialysis session.

4. The system of claim 1 , wherein the control system is programmed to set a volume and/or concentration of the one or more recharge solutions based on a desired amount of bicarbonate consumed by the sorbent cartridge during a subsequent dialysis session.

5. The system of claim 1 , further comprising a heater in the recharging flow path.

6. The system of claim 1 , wherein the desired initial therapy zirconium phosphate effluent pH is under 5.0.

7. A system, comprising;
a recharging flow path; the recharging flow path comprising one or more recharge solution sources fluidly connectable to an inlet of a reusable sorbent module containing zirconium oxide; the one or more recharge solution sources comprising at least one recharge solution source containing sodium hydroxide;
at least one pump for pumping one or more recharge solutions from the one or more recharge solution sources through the sorbent module; and
a control system, the control system setting a volume and/or concentration of the one or more recharge solutions pumped through the sorbent module necessary to recharge the sorbent material within the sorbent module based on one or more patient parameters and/or one or more dialysis session parameters for a patient and/or a prior dialysis session using the sorbent module; and further based on a desired initial therapy zirconium phosphate effluent pH.

8. The system of claim 7 , further comprising a heater in the recharging flow path.

9. The system of claim 7 , wherein the control system is programmed to pump between 6.0 and 7.5 moles of sodium hydroxide in the one or more recharge solutions per mole of phosphate pumped through the sorbent module during the prior dialysis session.

10. A method, comprising the steps of:
recharging a sorbent material within a reusable sorbent module by pumping one or more recharge solutions through the sorbent module;
wherein a volume and/or a concentration of the one or more recharge solutions is set based on one or more patient parameters and/or one or more dialysis session parameters for a patient and/or dialysis session using the sorbent module from a prior dialysis session and a desired initial therapy pH of a subsequent dialysis session.

Assignees

• Medtronic Inc

Inventors

• Pudil Bryant J
• Hobot Christopher M
• Gerber Martin T

Classifications

• B01J20/3433

  of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425 · CPC title

• A61M2202/0225

  Carbon oxides, e.g. Carbon dioxide · CPC title

• B01J20/3483

  by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• B01J20/0292

  Phosphates of compounds other than those provided for in B01J20/048 · CPC title