Chronic pH or electrolyte monitoring

Patent metadata

Field	Value
Publication number	US-9700661-B2
Application number	US-201213424525-A
Country	US
Kind code	B2
Filing date	Mar 20, 2012
Priority date	Apr 29, 2011
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

Methods include monitoring blood pH or electrolyte levels and setting initial fluid parameters, such as dialysate fluid parameters or replacement fluid parameters, for a blood fluid removal session based the monitored data. Blood fluid removal systems may employ sensors that monitor blood pH or electrolyte levels to adjust the fluid parameters during a blood fluid removal session.

First claim

What is claimed is:

1. A method for a blood fluid removal device, comprising the steps of:
(1) chronically monitoring a blood electrolyte concentration or blood pH of a patient via an implantable sensor device; and
(2) transmitting data regarding the monitored blood electrolyte concentration or blood pH to the blood fluid removal device selected from the group consisting of an ultrafiltration device, a hemofiltration device, a hemodiafiltration device, and a peritoneal dialysis device, or to control electronics configured to control the blood fluid removal device,
wherein the blood fluid removal device or control electronics determines an appropriate electrolyte concentration or buffer concentration of a fluid to be used in the blood fluid removal device based on the monitored blood electrolyte concentration or blood pH during a blood fluid removal session, and controls flow of a concentrate from one or more concentrate sources into the fluid to achieve the appropriate electrolyte concentration or buffer concentration.

2. The method of claim 1 , further comprising
(i) determining whether the monitored blood electrolyte concentration or blood pH crosses a predetermined threshold; and
(ii) alerting the patient if the blood electrolyte concentration or blood pH is determined to cross the threshold.

3. The method of claim 2 , further comprising alerting a healthcare provider if the blood electrolyte concentration or blood pH is determined to cross the threshold.

4. The method of claim 1 , wherein the fluid to be used in the blood fluid removal device comprises dialysate fluid.

5. The method of claim 1 , wherein the fluid to be used in the blood fluid removal device comprises replacement fluid.

6. The method of claim 1 , further comprising monitoring the blood electrolyte concentration or blood pH via an external sensor, and calibrating the implantable sensor based on data acquired from the external sensor.

7. The method of claim 6 , wherein the monitoring via the external sensor occurs during a blood fluid removal session, and wherein the calibrating occurs during a blood fluid removal session.

8. A method for a blood fluid removal device comprising:
chronically monitoring, via an implantable sensor, a blood electrolyte concentration or blood pH of a patient during a blood fluid removal session; and
initiating a blood fluid removal procedure for a patient in need thereof, wherein the procedure comprises use of a dialysate fluid and a dialysis membrane, as at least a part of a blood fluid removal medium, across which electrolytes may be exchanged between blood and dialysate fluid, and
transmitting data regarding the monitored blood electrolyte concentration or blood pH to the blood fluid removal device, containing the blood fluid removal medium, wherein the blood fluid removal device is selected from the group consisting of an ultrafiltration device, a hemofiltration device, a hemodiafiltration device, and a peritoneal dialysis device or to control electronics configured to control a blood fluid removal device,
wherein the blood fluid removal device or control electronics determines the appropriate electrolyte concentration or buffer concentration in the dialysate fluid based on a value of the monitored blood electrolyte concentration or blood pH during the blood fluid removal session, and the blood fluid removal device or control electronics controls flow of a concentrate from one or more concentrate sources into the dialysate fluid to achieve the appropriate electrolyte concentration or buffer concentration, and wherein the data is transmitted wirelessly.

9. A method for a blood fluid removal device comprising:
chronically monitoring, via an implantable sensor, a blood electrolyte concentration or blood pH of a patient during a blood fluid removal session; and
initiating a blood fluid removal procedure for a patient in need thereof, wherein the procedure comprises use of a dialysate fluid and a dialysis membrane, as at least a part of a blood fluid removal medium, across which electrolytes may be exchanged between blood and dialysate fluid,
wherein the rate of flow of the dialysate fluid or the blood is based on a value of the monitored blood electrolyte concentration or blood pH; and
transmitting data regarding the monitored blood electrolyte concentration or blood pH to the blood fluid removal device, containing the blood fluid removal medium, wherein the blood fluid removal device is selected from the group consisting of an ultrafiltration device, a hemofiltration device, a hemodiafiltration device, and a peritoneal dialysis device, or to control electronics configured to control the blood fluid removal device,
wherein the blood fluid removal device or control electronics determines an appropriate electrolyte concentration or buffer concentration in the dialysate fluid during the blood fluid removal session and controls flow of a concentrate from one or more concentrate sources into the dialysate fluid to achieve the appropriate electrolyte concentration or buffer concentration, and wherein the data is transmitted wirelessly.

10. The method of claim 1 , wherein the flow of concentrate from the one or more concentrate sources is controlled by one or more pumps and one or more valves in fluid communication with the one or more concentrate sources.

11. The method of claim 1 , wherein a patient for which a blood fluid removal session is indicated is identified prior to monitoring the blood electrolyte concentration or blood pH.

12. The method of claim 1 , wherein the step of determining an appropriate electrolyte concentration is performed by an implanted transducer.

13. The method of claim 1 , wherein the blood fluid removal device is an implantable blood fluid removal device.

14. The method of claim 1 , wherein the blood fluid removal device is a wearable blood fluid removal device.

15. The method of claim 1 , wherein the blood fluid removal device or control electronics determines an appropriate buffer concentration buffer is selected from the group consisting of bicarbonate, acetate, lactate, citrate, amino acid, and protein buffers.

16. The method of claim 1 , wherein the electrolyte is selected from the group consisting of sodium, potassium, calcium, and chloride.

17. The method of claim 1 , wherein the step of chronically monitoring blood electrolyte concentration comprises chronically monitoring multiple blood electrolyte concentrations, and wherein the step of determining an appropriate electrolyte concentration comprises determining an appropriate electrolyte concentration for each of the multiple electrolytes.

18. The method of claim 1 , further comprising the step of initiating a blood fluid removal session; and wherein the blood fluid removal device or control electronics determines an appropriate electrolyte concentration or buffer concentration of the fluid to be used in the blood fluid removal device based on the blood electrolyte concentration or blood pH during the blood fluid removal session.

19. The method of claim 1 , wherein the blood fluid removal device or control electronics determines an appropriate dialysate flow rate based on the blood electrolyte concentration or blood pH.

20. The method of claim 1 , wherein the blood fluid removal device or control electronics determines an appropriate blood flow rate based on the blood electrolyte concentration or blood pH.

21. The method of claim 1 , wherein the data is transmitted wirelessly.

22. The method of

Assignees

• Gerber Martin
• Lyu Suping
• Pudil Bryant
• Medtronic Inc

Inventors

• Gerber Martin
• Lyu Suping
• Pudil Bryant

Classifications

• A61M2205/3375

  Acoustical, e.g. ultrasonic, measuring means · CPC title

• A61M1/342

  Adding solutions to the blood, e.g. substitution solutions (for preventing coagulation A61M1/3672) · CPC title

• A61M2205/3306

  Optical measuring means · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• A61M2205/50

  with microprocessors or computers · CPC title