CONTROLLER FOR A BLOOD PARAMETER TESTING SYSTEM AND METHOD OF TESTING THEREFOR

• US 20080014601A1
• Filed: 05/24/2006
• Published: 01/17/2008
• Est. Priority Date: 05/24/2006
• Status: Abandoned Application

• Current Assignee: IntelliDx, Inc.
• Original Assignee: IntelliDx, Inc.
• Inventors: Larson, Robert, Klomhaus, Jill, Bellomo, Stephen, Pesach, Benny, Johnson, Larry, Siebrecht, Wayne, Nagar, Ron, Shreve, Eric, Bitton, Gabby, Pesach, Gidi, Argaman, Dalia, Goldberger, Daniel
• Application Number:
  US11/420,037
• Publication Number:
  US 20080014601A1
• Time in Patent Office: Days
• US Class Current: 435/14
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14553 specially adapted for cerebral tissue
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: A61B 5/153 Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146

Abstract

The present invention is directed toward a method of measuring a blood parameter and, in particular, a glucose measurement system controlled by a novel controller. In one embodiment, the system has a controller, a pump, flush solution in a first reservoir, IV solution in a second reservoir, a first valve, a second valve, and a plurality of tubing placing the pump, reservoirs, and valves in fluid communication with each other. The system operates by establishing a first state where the first state has the first valve open and second valve closed, closing the first valve, instructing the pump to extract fluid from tubing having IV solution therein, sensing a presence of blood at a first location in the tubing, measuring a blood parameter, instructing the pump to re-infuse the extracted fluid back into the tubing, opening the second valve where the second valve permits flush solution to flow from the first reservoir through tubing, instructing the pump to extract fluid from tubing having flush solution therein, closing the second valve, instructing the pump to re-infuse the extracted fluid having flush solution therein back into the tubing, and opening the first valve.

Claims

1. A method for measuring a blood parameter using a system having a controller, a pump, flush solution in a first reservoir, IV solution in a second reservoir, a first valve, a second valve, and a plurality of tubing placing said pump, said reservoirs, and said valves in fluid communication with each other, comprising the steps of:

a. establishing a first state wherein said first state has said first valve open and said second valve closed, wherein said first open valve permits IV solution to flow from said second reservoir through tubing and to a patient;

b. closing said first valve;

c. instructing said pump to extract fluid from tubing having IV solution therein;

d. sensing a presence of blood at a first location in said tubing;

e. measuring a blood parameter;

f. instructing said pump to re-infuse the extracted fluid back into said tubing;

g. opening said second valve wherein said second valve permits flush solution to flow from said first reservoir through tubing;

h. instructing said pump to extract fluid from tubing having flush solution therein;

i. closing said second valve;

j. instructing said pump to re-infuse the extracted fluid having flush solution therein back into said tubing; and

k. opening said first valve.

2. The method of claim 1 further comprising a third valve.

3. The method of claim 2 wherein said third valve is open during said first state.

4. The method of claim 2 wherein said third valve is closed when said second valve is open.

5. The method of claim 1 further comprising a sample port.

6. The method of claim 5 wherein the sensing of a presence of blood at a first location in said tubing is performed using a blood presence sensor.

7. The method of claim 6 wherein the sample port is located between said blood presence sensor and said patient along the line of fluid flow between said patient and the blood presence sensor.

8. The method of claim 7 wherein the sample port is used to access blood in order to measure a blood parameter.

9. The method of claim 8 wherein the blood parameter is glucose.

10. The method of claim 9 wherein the glucose is measured using a glucose oxidase strip.

11. The method of claim 1 wherein re-infusion of fluid back into said tubing occurring after the measurement of a blood parameter occurs based upon a manual instruction from a user.

12. The method of claim 1 wherein re-infusion of fluid back into said tubing occurring after the measurement of a blood parameter occurs automatically.

13. The method of claim 12 wherein the sensing of a presence of blood at a first location in said tubing is performed using a blood presence sensor.

14. The method of claim 13 wherein said automatic re-infusion is initiated based upon a signal from said blood presence sensor.

15. The method of claim 12 wherein said automatic re-infusion is initiated based upon a signal from said pump.

16. The method of claim 12 wherein said automatic re-infusion is initiated based upon a predefined period of time.

17. The method of claim 1 wherein at least one of said valves is a pinch valve.

18. The method of claim 1 wherein said pump is a syringe pump.

19. A controller for controlling the measurement of a blood parameter in a system having a pump, flush solution in a first reservoir, IV solution in a second reservoir, a first valve, a blood presence sensor, a second valve, a plurality of tubing placing said pump, said reservoirs, and said valves in fluid communication with each other, and a plurality of data connections placing said controller in data communication with said valves, blood presence sensor, and said pump, comprising a processor wherein said processor:

a. issues instructions to establish a first state in the system, wherein said first state has said first valve open and said second valve closed, wherein said first open valve permits IV solution to flow from said second reservoir through tubing and to a patient;

b. instructs said first valve to close;

c. instructs said pump to extract fluid from tubing having IV solution therein;

d. receives a signal from the blood presence sensor indicating the presence of blood at a first location in said tubing;

e. instructs said pump to re-infuse the extracted fluid back into said tubing;

f. instructs said second valve to open wherein said second valve permits flush solution to flow from said first reservoir through tubing;

g. instructs said pump to extract fluid from tubing having flush solution therein;

h. instructs said second valve to close;

i. instructs said pump to re-infuse the extracted fluid having flush solution therein back into said tubing; and

j. instructs said first valve to open.

20. The controller of claim 19 wherein said processor is in data communication with a third valve.

21. The controller of claim 20 wherein said processor instructs said third valve to be open during said first state.

22. The controller of claim 20 wherein said processor instructs said a third valve to be closed when said second valve is open.

23. The controller of claim 19 wherein said processor is in data communication with a sample port.

24. The controller of claim 23 wherein the sample port is used to access blood in order to measure a blood parameter.

25. The controller of claim 24 wherein the blood parameter is glucose.

26. The controller of claim 25 wherein the glucose is measured using a glucose oxidase strip.

27. The controller of claim 19 wherein the processor instructs the pump to re-infuse fluid back into said tubing based upon a manual instruction from a user.

28. The controller of claim 19 wherein the processor instructs the pump to re-infuse fluid back into said tubing based upon a signal.

29. The controller of claim 28 wherein said signal is from said blood presence sensor.

30. The controller of claim 28 wherein said signal is from said pump.