Core body temperature detection device
A system and method for detecting and monitoring core body temperature are disclosed. The system includes a patch device and an electronic module coupled to the patch device. The method includes providing a patch device, coupling an electronic module to the patch device to provide a wearable device, and monitoring core body temperature of a user using the wearable device.
1. A system for core body temperature monitoring, the system comprising:
a patch device; and
an electronic module, coupled to the patch device, including a first sensor and a second sensor, wherein the electronic module:
receives a first temperature measure from a first sensor,
receives a second temperature from a second sensor,
determines whether the first sensor and the second sensor are in a steady state by utilizing the first and second temperature,
calculates a predictive temporal estimate in a logic loop according to an equation utilizing one of an exponential, polynomial, and logarithmic equation for core body temperature until the first sensor and the second sensor are in the steady state, and
when the first sensor and the second sensor are in the steady state:
if a reference device is available, receives a calibration correction factor calibrated to the reference device and calculates a core body temperature using the calibration correction factor, and
if the reference device is not available, calculates a core body temperature using an adaptive correction factor.
2. The system of claim 1 , wherein the patch device is disposable and the electronic module is at least one of a disposable module and a reusable module.
3. The system of claim 2 , wherein the disposable patch device further comprises:
a top layer;
a sub-assembly layer coupled to the top layer; and
a bottom layer coupled to the sub-assembly layer, wherein the top layer includes a first layer and a chamber area that resides on top of the first layer to house the electronic module.
4. The system of claim 3 , wherein the first sensor and the second sensor coupled to the patch device are coupled to the sub-assembly layer.
5. The system of claim 3 , further comprising a plurality of spacers, wherein at least one spacer comprises an insulating material.
6. The system of claim 5 , wherein the at least one spacer separates the first sensor and the second sensor.
7. The system of claim 5 , wherein the at least one plurality of spacers includes any of closed cell foam, air, and polyethylene foam.
8. The system of claim 3 , wherein the sub-assembly layer includes an electronic flex circuit.
9. The system of claim 8 , wherein the electronic flex circuit includes at least two electrodes, a battery, and integrated connector circuits for the attachment of the electronic module.
10. The system of claim 3 , wherein the bottom layer Includes an adhesive bottom layer.
11. The system of claim 1 , further comprising at least one motion sensor to detect movement and adjust captured measurements of the first sensor and the second sensor according to the detected movements.
12. The system of claim 1 , wherein the adaptive correction factor depends on at least one of: demographics, surround temperature range, or relative change in different temperature data-streams.
13. A method for detection core body temperature, the method performed by an electronic module configured for:
receiving a first temperature measure from a first sensor;
receiving a second temperature from a second sensor;
determining whether the first sensor and the second sensor are in a steady state by utilizing the first and second temperature;
calculating a predictive temporal estimate in a logic loop according to an equation utilizing one of an exponential, polynomial, and logarithmic equation for core body temperature until the first sensor and the second sensor are in the steady state; and
when the first sensor and the second sensor are in the steady state:
if a reference device is available, receiving a calibration correction factor calibrated to the reference device and calculating a core body temperature using the calibration correction factor, and
if the reference device is not available, calculating a core body temperature using an adaptive correction factor.
14. The method of claim 13 , wherein the determining whether the first sensor and the second sensor are in the steady state includes comparing changes in continuous temperature sensor measurements to a standardized threshold.
15. The method of claim 14 , further comprising detecting movements and adjusting the calculated core body temperature according to the detected movements.
16. The method of claim 14 , wherein the standardized threshold is based on the thermal characteristics of the first sensor and the second sensor.
17. The method of claim 13 , further comprising a one-time calibration when initially calculating the core body temperature.
18. The method of claim 17 , wherein the reference device includes a standardized clinical thermometer.
19. The method of claim 13 , wherein the equation utilizing the exponential equation includes:
T
BodyTemp
=
e
-
(
Δ
t
τ
)
×
[
±
α
1
T
sensor
1
±
α
2
T
sensor
2
±
α
3
(
T
sensor
1
-
T
sensor
2
)
±
α
4
(
T
sensor
1
-
T
sensor
2
)
2
±
γ
]
,
wherein:
τ corresponds to a time-constant for the temperature sensors T sensor ,
Δt corresponds to a time-elapsed,
α i corresponds to a coefficient depending on at least one of: age, gender, body-mass-index (BMI), ethnicity or physical health condition of an individual, and
γ corresponds to a correction factor.
20. A method for core body temperature monitoring, the method comprising:
providing a patch device;
coupling an electronic module to the patch device to provide a wearable device, the electronic module including at least two temperature sensors; and
monitoring core body temperature of a user using the wearable device by:
receiving a first temperature measure from a first sensor of the at last two temperature sensors,
receiving a second temperature from a second sensor of the at last two temperature sensors,
determining whether the first sensor and the second sensor are in a steady state by utilizing the first and second temperature,
calculating a predictive temporal estimate in a logic loop according to an equation utilizing one of an exponential, polynomial, or logarithmic equation for core body temperature until the first sensor and the second sensor are in the steady state, and
when the first sensor and the second sensor are in the steady state:
if a reference device is available, receiving a calibration correction factor calibrated to the reference device and calculating a core body temperature using the calibration correction factor, and
if the reference device is not available, calculating a core body temperature using an adaptive correction factor.