PHYSIOLOGICAL PARAMETER SENSING SYSTEM WITH HEAT ISOLATION MECHANISM
A physiological parameter sensing system provides a sensing device for measuring a physiological parameter of a subject. The sensing device includes various components that operate as heat sources, which can influence the operation of sensors in the device. The sensing device includes a heat isolation mechanism that thermally isolates the sensors from the heat sources.
1 . A physiological parameter sensing device, the sensing device comprising:
a mounting portion configured to engage with a subject; and
a circuit board including:
a processing unit;
a sensing subcircuit connected to the processing unit and configured to measure a physiological parameter of the subject; and
a heat isolation device connected to the processing unit and configured to thermally isolate the sensing subcircuit from the processing unit.
2 . The physiological parameter sensing device of claim 1 , wherein the heat isolation device includes a heat dissipation device connected to the processing unit and draw dissipate heat generated from the processing unit.
3 . The physiological parameter sensing device of claim 2 , wherein the heat dissipation device includes a plurality of trace prongs.
4 . The physiological parameter sensing device of claim 1 , wherein the heat isolation device includes a track extension device having a conductive track routed between the sensing subcircuit and the processing unit.
5 . The physiological parameter sensing device of claim 4 , wherein the conductive track of the track extension device has a width ranging from about 5 mil to about 25 mil.
6 . The physiological parameter sensing device of claim 4 , wherein the conductive track of the track extension device is routed in a loop to make a length of the conductive track longer than a distance between the processing unit and the sensing subcircuit.
7 . The physiological parameter sensing device of claim 4 , wherein the track extension device includes a stretch-out portion, the stretch-out portion having a pair of track lines extending out from a main track.
8 . The physiological parameter sensing device of claim 7 , wherein the pair of track lines are arranged to be parallel with each other.
9 . The physiological parameter sensing device of claim 1 , wherein the sensing subcircuit includes a thermistor pad.
10 . The physiological parameter sensing device of claim 9 , wherein the heat isolation device includes a track extension device having a conductive track routed between the sensing subcircuit and the processing unit, the conductive track having a width smaller than a width of the thermistor pad.
11 . A temperature sensing patch comprising:
a mounting layer engagable with a subject; and
a circuit board including:
a processing unit;
a pair of thermistor pads configured to measure heat flux associated with the subject;
a pair of thermistor tracks connecting the pair of thermistor pads to the processing unit; and
a heat isolation device connected to the processing unit and configured to thermally isolate the pair of thermistor pads from the processing unit.
12 . The temperature sensing patch of claim 11 , wherein the heat isolation device includes a heat dissipation device connected to the processing unit and draw dissipate heat generated from the processing unit.
13 . The temperature sensing patch of claim 12 , wherein the heat dissipation device includes a plurality of trace prongs.
14 . The temperature sensing patch of claim 11 , wherein at least a portion of the pair of thermistor tracks has a width smaller than a width of either of the pair of thermistor pads.
15 . The temperature sensing patch of claim 11 , wherein at least a portion of the pair of thermistor tracks has a width ranging from 5 mil to about 25 mil.
16 . The temperature sensing patch of claim 11 , wherein the pair of thermistor tracks is routed in a loop to make a length of the pair of thermistor tracks longer than a distance between the processing unit and the pair of thermistor pads.
17 . The temperature sensing patch of claim 4 , wherein the pair of thermistor tracks includes a stretch-out portion, the stretch-out portion having a pair of track lines extending out from a main track.
18 . The temperature sensing patch of claim 17 , wherein the pair of track lines are arranged to be parallel with each other.
19 . A system for monitoring a physiological parameter of a subject, the system comprising:
a sensing device including:
a mounting portion engaged with a subject; and
a circuit board including:
a processing unit;
a sensing subcircuit connected to the processing unit and configured to measure a physiological parameter of the subject; and
a heat isolation device connected to the processing unit and configured to thermally isolate the sensing subcircuit from the processing unit; and
an interrogation device operable by a user and configured to:
establish communication with the sensing device; and
receive measurement data from the sensing device.
20 . The system of claim 19 , wherein the interrogation device is configured to communicate with the sensing device via short range wireless communication.