Method and apparatus for providing data processing and control in a medical communication system

• US 20080287761A1
• Filed: 05/14/2008
• Published: 11/20/2008
• Est. Priority Date: 05/14/2007
• Status: Active Grant

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories Incorporated)
• Inventors: Hayter, Gary, Feldman, Benjamin J., McGarraugh, Geoffrey V., Mazza, John C., Naegeli, Andrew H.
• Granted Patent: US 8,600,681 B2
• Time in Patent Office: Days
• US Class Current: 600/365
• CPC Class Codes: A61B 2560/0223 of calibration, e.g. protocols for calibrating sensors
• CPC Class Codes: A61B 2560/0252 using ambient temperature
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 5/7221 Determining signal validity, reliability or quality A61B5/7207 and A61B5/7217 take precedence
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: G01D 18/008 with calibration coefficients stored in memory
• CPC Class Codes: G01N 33/48 Biological material, e.g. blood, urine G01N33/02, G01N33/26, G01N33/44, G01N33/46 take precedence; Haemocytometers counting blood corpuscules distributed over a surface by scanning the surface G06M11/02
• CPC Class Codes: G16H 15/00 ICT specially adapted for medical reports, e.g. generation or transmission thereof
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/40 for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

Methods and apparatus for providing data processing and control for use in a medical communication system are provided.

Claims

1. A method, comprising:

receiving a calibration parameter to calibrate an in vivo analyte sensor;

determining a sensitivity value associated with the received calibration parameter;

retrieving a prior sensitivity value associated with the analyte sensor; and

determining a composite sensitivity for the analyte sensor based on one or more of the calibration parameter received, the determined sensitivity value and the retrieved prior sensitivity value.

2. The method of claim 1 wherein the calibration parameter includes a blood glucose value.

3. The method of claim 1 wherein the retrieved prior sensitivity value is associated with a prior calibration parameter used to calibrate the analyte sensor.

4. The method of claim 3 wherein the prior calibration parameter includes a blood glucose value.

5. The method of claim 1 wherein determining the composite sensitivity includes applying a first weighted parameter to the determined sensitivity value and applying a second weighted parameter to the retrieved prior sensitivity value.

6. The method of claim 5 wherein the first weighted parameter and the second weighted parameter are different.

7. The method of claim 5 wherein the first weighted parameter and the second weighted parameter are substantially the same.

8. The method of claim 5 wherein the first weighted parameter and the second weighted parameter are time based.

9. The method of claim 8 wherein the prior sensitivity value associated with the analyte sensor is based on a prior calibration parameter used to calibrate the in vivo analyte sensor prior to a predetermined time period of receiving the calibration parameter.

10. The method of claim 8 wherein the first weighted parameter is associated with a current in vivo analyte sensor calibration event, and the second weighted parameter is associated with a prior in vivo analyte sensor calibration event.

11. An apparatus, comprising:

an interface unit to receive one or more signals associated with a continuously monitored analyte level and a blood glucose value; and

a processing unit coupled to the interface unit configured to determine a sensitivity value associated with a received blood glucose value, to retrieve a prior sensitivity value associated with an in vivo analyte sensor, and to determine a composite sensitivity based on the determined sensitivity value and the retrieved prior sensitivity value.

12. The apparatus of claim 11 wherein the retrieved prior sensitivity value is associated with a prior calibration parameter used to calibrate the in vivo analyte sensor.

13. The apparatus of claim 11 wherein the processing unit is configured to apply a first weighted parameter to the determined sensitivity value and to apply a second weighted parameter to the retrieved prior sensitivity value.

14. The apparatus of claim 13 wherein the first weighted parameter and the second weighted parameter are different.

15. The apparatus of claim 11 wherein the prior sensitivity value associated with the analyte sensor is based on a prior calibration event to calibrate the analyte sensor prior to a predetermined time period of receiving the blood glucose value.

16. The apparatus of claim 11 including a housing coupled to the interface unit, the housing including a blood glucose test strip port.

17. The apparatus of claim 16 wherein the processing unit is coupled to the housing, and including a display unit to display one or more information associated with the composite sensitivity.

18. The apparatus of claim 17 wherein the displayed one or more information associated with the composite sensitivity includes an in vivo analyte sensor calibration completion event.

19. The apparatus of claim 11 wherein the composite sensitivity is determined based on a weighted average of the determined sensitivity value and the prior sensitivity value associated with the analyte sensor.

20. A glucose monitoring system, comprising:

a transcutaneously positionable in vivo analyte sensor for monitoring an analyte level;

an analyte monitoring device coupled to the analyte sensor for receiving signals from the analyte sensor associated with the monitored analyte level; and

a data processing unit coupled to the analyte monitoring device configured to determine a sensitivity value associated with a received blood glucose value, to retrieve a prior sensitivity value associated with the analyte sensor, and to determine a composite sensitivity based on the determined sensitivity value and the retrieved prior sensitivity value.

21. The system of claim 20 wherein the analyte sensor includes a glucose sensor.

22. The system of claim 20 wherein the data processing unit is in signal communication with the analyte monitoring device based on a predetermined communication protocol.

23. The system of claim 22 wherein the predetermined communication protocol includes one of an RF communication protocol, an infrared communication protocol, a Bluetooth communication protocol, a Zigbee communication protocol, or an 802.11x communication protocol.

24. The system of claim 20 wherein the retrieved prior sensitivity value is associated with a prior calibration parameter used to calibrate the in vivo analyte sensor.

25. The system of claim 20 wherein the data processing unit is configured to apply a first weighted parameter to the determined sensitivity value and to apply a second weighted parameter to the retrieved prior sensitivity value.

26. The system of claim 20 wherein the prior sensitivity value associated with the analyte sensor is based on a prior calibration event to calibrate the analyte sensor prior to a predetermined time period of receiving the blood glucose value.

27. The system of claim 20 wherein the composite sensitivity is determined based on a weighted average of the determined sensitivity value and the prior sensitivity value associated with the analyte sensor.