Electronic thermometer with selectable modes

• US 8,585,285 B2
• Filed: 05/11/2012
• Issued: 11/19/2013
• Est. Priority Date: 10/06/2006
• Status: Active Grant

• Current Assignee: Cardinal Health Ireland Unlimited Company (Cardinal Health, Inc.)
• Original Assignee: Covidien AG (Medtronic Plc)
• Inventors: Bisch, Michael E., Gierer, Joseph T.
• Primary Examiner(s): Jagan, Mirellys
• Application Number:
  US13/469,200
• Publication Number:
  US 20120221286A1
• Time in Patent Office: 557 Days
• Field of Search: 374/121, 374/163, 374/208
• US Class Current: 374/163
• CPC Class Codes: G01K 13/20 Clinical contact thermometers for use with humans or animals
• CPC Class Codes: G01K 7/42 Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature

Abstract

An electronic thermometer is configured for selectable predictive modes based upon the same predictive algorithm. A mode selector is adapted for user selection between several modes of operation of the thermometer. Each mode of operation utilizes the same predictive algorithm for estimating the temperature of the subject before the thermometer reaches full equilibrium. Different modes offer users a selection for striking the appropriate balance between response time and precision, based upon user preferences and needs.

Claims

1. An electronic thermometer comprising:

a probe adapted to be heated by a subject for use in measuring the temperature of the subject;

at least one temperature sensor for detecting the temperature of the probe; and

a processor configured for user selection between at least a first predictive mode of operation of the thermometer and a second predictive mode of operation of the thermometer for determining temperature, the second mode of operation determining temperature more slowly but with greater precision as compared with the first mode of operation, the first mode of operation utilizing a predictive algorithm for estimating the temperature of the subject before the thermometer reaches full equilibrium with the subject based on a plurality of samples of the temperature of the probe detected by the temperature sensor.

2. The electronic thermometer as set forth in claim 1, wherein said processor is further configured for user selection between at least the first mode of operation, the second mode of operation, and a third mode of operation of the thermometer, the third mode of operation comprising a direct measurement mode by collecting temperature information until the temperature of the temperature sensor equilibrates with the subject, whereby the thermometer determines the temperature in the third mode of operation more slowly and without utilizing a prediction algorithm but with even greater precision, as compared with the first and second modes of operation.

3. The electronic thermometer as set forth in claim 1, wherein as a result of the user selection of the first mode of operation of the thermometer, the processor is further configured to estimate the temperature of the subject with the predictive algorithm according to the first mode of operation when a predetermined number of samples of the temperature of the probe detected by the temperature sensor has been collected.

4. The electronic thermometer as set forth in claim 1, wherein as a result of the user selection of the first mode of operation of the thermometer, the processor is further configured to estimate the temperature of the subject with the predictive algorithm according to the first mode of operation when the samples of the temperature of the probe detected by the temperature sensor have been collected for at least a predetermined amount of time.

5. The electronic thermometer as set forth in claim 1, wherein as a result of the user selection of the second mode of operation of the thermometer, the processor is further configured to estimate the temperature of the subject with the predictive algorithm according to the second mode of operation when the estimates of the predictive algorithm converge to a precision meeting a minimum threshold.

6. The electronic thermometer as set forth in claim 1, wherein the processor is further configured to collect one or more additional samples of the temperature of the probe detected by the temperature sensor when the estimated temperature of the subject is outside a predetermined temperature range.

7. The electronic thermometer as set forth in claim 1, wherein said processor is further configured for receiving from a user of the thermometer a selection between a plurality of predictive modes of operation of the thermometer, the plurality of predictive modes of operation being arranged for selection along a continuum from a shortest measurement duration and a standard-precision measurement to a longest measurement duration and a highest-precision measurement, each of said plurality of predictive modes of operation utilizing the same predictive algorithm for estimating the temperature of the subject before the thermometer reaches full equilibrium with the subject.

8. The electronic thermometer as set forth in claim 7, further comprising one of a rotary dial adapted to be rotated to a plurality of positions corresponding to the plurality of predictive modes of operation, a movable selector adapted to be moved to a plurality of positions corresponding to the plurality of predictive modes of operation, and a plurality of buttons, each button corresponding to one of the plurality of predictive modes of operation.

9. An electronic thermometer comprising:

a probe adapted to be heated by a subject for use in measuring a temperature of the subject;

at least one temperature sensor for detecting the temperature of the probe; and

a processor configured for;

receiving from a user of the thermometer a selection of one of a plurality of modes of operation of the thermometer, said user selecting between at least a first mode of operation of the thermometer for estimating the temperature of the subject and a second mode of operation of the thermometer for estimating the temperature of the subject;

collecting temperatures of the subject measured by the thermometer over time;

applying a first portion of the collected measured temperatures to a predictive algorithm according to the first mode of operation when the selection received from the user is for the first mode of operation;

applying the first portion and a second portion of the collected measured temperatures to the same predictive algorithm according to the second mode of operation when the selection received from the user is for the second mode of operation; and

estimating the temperature of the subject with the predictive algorithm based on the selected mode of operation before the thermometer reaches full equilibrium with the subject.

10. The electronic thermometer of claim 9, wherein the processor is further configured to estimate the temperature of the subject with the predictive algorithm based on the first portion of collected measured temperatures according to the first mode of operation more quickly as compared with when the temperature of the subject is estimated with the predictive algorithm based on the first portion and the second portion of collected measured temperatures according to the second mode of operation.

11. The electronic thermometer of claim 9, wherein the processor is further configured to estimate the temperature of the subject with the predictive algorithm based on the first portion and the second portion of collected measured temperatures according to the second mode of operation with greater precision as compared with when the temperature of the subject is estimated with the predictive algorithm based on the first portion of collected measured temperatures according to the first mode of operation.

12. The electronic thermometer of claim 9, wherein as a result of the selection by the user of the first mode of operation of the thermometer, the processor is further configured to apply fewer measured temperatures to the predictive algorithm according to the first mode of operation as compared with the number of measured temperatures applied to the same predictive algorithm according to the second mode of operation.

13. The electronic thermometer of claim 9, wherein as a result of the selection by the user of the first mode of operation of the thermometer, the processor is further configured to estimate the temperature of the subject with the predictive algorithm according to the first mode of operation when the collecting temperatures of the subject over time has collected at least a predetermined number of measured temperatures.

14. The electronic thermometer of claim 9, wherein as a result of the selection by the user of the first mode of operation of the thermometer, the processor is further configured to estimate the temperature of the subject with the predictive algorithm according to the first mode of operation when the collecting temperatures of the subject over time has occurred continuously for at least a predetermined amount of time.

15. The electronic thermometer of claim 9, wherein as a result of the selection by the user of the second mode of operation of the thermometer, the processor is further configured to estimate the temperature of the subject with the predictive algorithm according to the second mode of operation when the estimates of the predictive algorithm converge to a precision meeting a minimum threshold.

16. The electronic thermometer of claim 9, wherein the processor is further configured to apply measured temperatures to the predictive algorithm collected over less time according to the first mode of operation as compared with the measured temperatures applied to the same predictive algorithm according to the second mode of operation.

17. The electronic thermometer of claim 9, wherein the processor is further configured to collect one or more additional temperatures of the subject measured by the thermometer when the estimated temperature of the subject is outside a predetermined temperature range.

18. The electronic thermometer of claim 9, wherein the processor is further configured for user selection between at least the first mode of operation, the second mode of operation, and a third mode of operation of the thermometer, the third mode of operation comprising a direct measurement mode for collecting temperature information until the temperature of the temperature sensor equilibrates with the subject, whereby the thermometer determines the temperature in the third mode of operation more slowly and without utilizing a predictive algorithm but with greater precision, as compared with the first and second modes of operation.

19. The electronic thermometer of claim 18, wherein the processor is further configured to:

determine if a time limit has elapsed; and

switch from one of the first and second modes of operation selected by the user to the direct measurement mode of operation when the time limit has elapsed.

20. An electronic thermometer comprising:

a probe configured to be heated by a subject for use in measuring a temperature of the subject;

a temperature sensor for detecting the temperature of the probe;

a selection element adjustable along a continuum; and

a processor configured for;

receiving via the selection element from a user of the electronic thermometer a selection of one of a plurality of predictive modes of operation of the thermometer, the plurality of predictive modes of operation being selectable along a continuum from a shortest measurement duration and a standard-precision measurement to a longest measurement duration and a highest-precision measurement;

collecting temperatures of the subject measured by the thermometer over time;

applying at least some of the collected measured temperatures to a predictive algorithm determined according to the predictive mode of operation selected by the user, wherein a fewer number of the collected measured temperatures are applied to the predictive algorithm for the standard-precision measurement than for the highest-precision measurement; and

estimating the temperature of the subject with the predictive algorithm based upon the selected mode of operation.