Power management system for a handheld medical device

• US 8,849,459 B2
• Filed: 10/15/2010
• Issued: 09/30/2014
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Ramey, Blaine Edward, McKee, Michael C., Nicholas, Michael G.
• Primary Examiner(s): SIEFKE, SAMUEL P
• Application Number:
  US12/905,462
• Publication Number:
  US 20120095312A1
• Time in Patent Office: 1,446 Days
• Field of Search: 422/82.12, 422/68.1, 700/266
• US Class Current: 700/266
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2560/0252 using ambient temperature
• CPC Class Codes: A61B 2560/0443 Modular apparatus
• CPC Class Codes: A61B 2560/045 with a separable interface unit, e.g. for communication
• 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 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150305 Packages specially adapted for piercing devices or blood sampling devices kits for diabetes A61M5/003; packaging in general B65D
• 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 5/150854 long distance, e.g. between patient's home and doctor's office
• CPC Class Codes: A61B 5/150862 intermediate range, e.g. within room or building
• CPC Class Codes: A61B 5/15087 short range, e.g. between console and disposable using implanted devices A61B5/150877
• CPC Class Codes: A61B 5/150877 with implanted devices
• CPC Class Codes: A61B 5/150946 Means for varying, regulating, indicating or limiting the speed or time of blood collection
• 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
• CPC Class Codes: A61B 5/157 Devices characterised by integrated means for measuring characteristics of blood
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: G01K 7/42 Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
• CPC Class Codes: G01N 33/48785 Electrical and electronic details of measuring devices for physical analysis of liquid biological material not specific to a particular test method, e.g. user interface or power supply
• CPC Class Codes: G16H 40/63 for local operation

Abstract

A system for managing power consumption of a handheld diabetes management device and limiting effects of temperature on operations performed by the handheld diabetes management device comprises a blood glucose measuring module, a temperature sensing module, and a power management module. The blood glucose measuring module selectively measures blood glucose in a blood sample and generates a status signal indicating a status of operation of the blood glucose measuring module. The temperature sensing module senses an internal temperature of the handheld diabetes management device and estimates an ambient temperature external to the handheld diabetes management device. The power management module deactivates one or more components of the handheld diabetes management device based on the status of operation of the blood glucose measuring module when the internal temperature of the handheld diabetes management device exceeds a threshold temperature. The power management module deactivates the blood glucose measuring module when the ambient temperature is greater than a first predetermined threshold or less than a second predetermined threshold.

Claims

1. A system for managing power consumption of a handheld diabetes management device and limiting effects of temperature on operations performed by the handheld diabetes management device, the system comprising:

a temperature sensor that senses an internal temperature of the handheld diabetes management device;

a port that externally receives a removable measurement strip having a reaction site for receiving a blood sample;

a thermal modeling module that uses a thermal model to estimate an ambient temperature proximate to the reaction site based on the internal temperature; and

a power management module that deactivates one or more components of the handheld diabetes management device when the ambient temperature proximate to the reaction site exceeds a threshold temperature,

wherein the one or more components include;

a first communication module that communicates with a first device external to the handheld diabetes management device using a first communication protocol, wherein the first device performs a first function associated with a patient, and wherein the first function has a first priority, and

a second communication module that communicates via a wireless communication link with a second device external to the handheld diabetes management device using a second communication protocol, wherein the second device performs a second function associated with the patient, and wherein the second function has a second priority that is lower than the first priority,

wherein the power management module deactivates the second communication module before deactivating the first communication module, and

wherein the first communication module and the second communication module are located within the handheld diabetes management device.

2. The system of claim 1 wherein the first device includes an insulin infusion pump that delivers insulin to the patient, and wherein the second device includes a continuous glucose monitor that monitors glucose level of the patient.

3. The system of claim 1 further comprising:

a battery that supplies power to the one or more components;

a fuel gauge module that estimates a remaining capacity of the battery; and

a temperature sensing module that senses the internal temperature of the handheld diabetes management device,

wherein the power management module deactivates the one or more components based on the remaining capacity of the battery and the internal temperature of the handheld diabetes management device.

4. The system of claim 1 further comprising a blood glucose measuring module that measures blood glucose in the blood sample and that has accuracy that is characterized over a predetermined temperature range of the reaction site.

5. The system of claim 1 further comprising:

a battery that supplies power to the one or more components; and

a temperature sensing module that senses temperatures at a plurality of locations in the handheld diabetes management device,

wherein the thermal modeling module estimates the ambient temperature and a rate of change of the internal temperature based on the temperatures based on the sensed temperatures and the power supplied to the one or more components, and

wherein the power management module deactivates the one or more components based on the ambient temperature and the rate of change of the internal temperature.

6. The system of claim 1 further comprising a usage monitoring module that monitors usage of the one or more components, wherein the power management module deactivates the one or more components based on the usage of the one or more components of the handheld diabetes management device.

7. The system of claim 1 further comprising:

a usage monitoring module that monitors usage of the one or more components; and

a fuel gauge module that gauges a remaining capacity of a battery that supplies power to the one or more components,

wherein the power management module (i) forecasts remaining operating time of the handheld diabetes management device based on the usage and the remaining capacity of the battery and (ii) deactivates the one or more components based on the forecast.

8. A system for managing power consumption of a handheld medical device and limiting effects of temperature on operations performed by the handheld medical device, the system comprising:

a temperature sensor that senses an internal temperature of the medical device;

a port that externally receives a removable measurement strip having a reaction site for receiving a sample of a substance for measuring a health parameter of a patient;

a thermal modeling module that uses a thermal model to estimate an ambient temperature proximate to the reaction site based on the internal temperature; and

a power management module that deactivates one or more components of the medical device when the ambient temperature proximate to the reaction site is greater than a first threshold temperature or is less than a second threshold temperature,

wherein the one or more components include;

a first communication module that communicates with a first device external to the handheld medical device using a first communication protocol, wherein the first device performs a first function associated with a patient, and wherein the first function has a first priority, and

a second communication module that communicates via a wireless communication link with a second device external to the handheld medical device using a second corn communication protocol, wherein the second device performs a second function associated with the patient, and wherein the second function has a second priority that is lower than the first priority,

wherein the power management module deactivates the second communication module before deactivating the first communication module, and

wherein the first communication module and the second communication module are located within the handheld medical device.

9. The system of claim 8 wherein the first device includes an insulin infusion pump that delivers insulin to the patient, and wherein the second device includes a continuous glucose monitor that monitors glucose level of the patient.

10. The system of claim 8 further comprising:

a battery that supplies power to the one or more components;

a fuel gauge module that estimates a remaining capacity of the battery; and

a temperature sensing module that senses the internal temperature of the handheld medical device,

wherein the power management module deactivates the one or more components based on the remaining capacity of the battery and the internal temperature of the handheld medical device.

11. The system of claim 8 further comprising a blood glucose measuring module that has accuracy that is characterized over a predetermined temperature range of the reaction site.

12. The system of claim 8 further comprising:

a battery that supplies power to the one or more components; and

a temperature sensing module that senses temperatures at a plurality of locations in the handheld medical device based on power supplied to the one or more components,

wherein the thermal modeling module estimates the ambient temperature and a rate of change of the internal temperature based on the temperatures, and

wherein the power management module deactivates the one or more components based on the ambient temperature and the rate of change of the internal temperature.

13. The system of claim 8 further comprising:

a battery that supplies power to the one or more components; and

a glucose measuring module that measures an amount of the substance in the sample.

14. The system of claim 8 further comprising a usage monitoring module that monitors usage of the one or more components, wherein the power management module deactivates the one or more components based on the usage of the one or more components of the handheld medical device.

15. The system of claim 8 further comprising:

a usage monitoring module that monitors usage of the one or more components; and

a fuel gauge module that gauges a remaining capacity of a battery that supplies power to the one or more components,

wherein the power management module (i) forecasts remaining operating time of the handheld medical device based on the usage and the remaining capacity of the battery and (ii) deactivates the one or more components based on the forecast.