+

WO2018152566A1 - Capteur de température - Google Patents

Capteur de température Download PDF

Info

Publication number
WO2018152566A1
WO2018152566A1 PCT/AU2018/000026 AU2018000026W WO2018152566A1 WO 2018152566 A1 WO2018152566 A1 WO 2018152566A1 AU 2018000026 W AU2018000026 W AU 2018000026W WO 2018152566 A1 WO2018152566 A1 WO 2018152566A1
Authority
WO
WIPO (PCT)
Prior art keywords
temperature
temperature sensing
temperature sensor
sensing element
thermal
Prior art date
Application number
PCT/AU2018/000026
Other languages
English (en)
Inventor
Jacqueline Sarah SAVAGE
Original Assignee
Savage Jacqueline Sarah
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2017900631A external-priority patent/AU2017900631A0/en
Application filed by Savage Jacqueline Sarah filed Critical Savage Jacqueline Sarah
Priority to AU2018223205A priority Critical patent/AU2018223205B2/en
Publication of WO2018152566A1 publication Critical patent/WO2018152566A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6832—Means for maintaining contact with the body using adhesives
    • A61B5/6833—Adhesive patches
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
    • G01K1/165—Special arrangements for conducting heat from the object to the sensitive element for application in zero heat flux sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/20—Clinical contact thermometers for use with humans or animals
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/63—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/30—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for calculating health indices; for individual health risk assessment
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
    • G16Z99/00—Subject matter not provided for in other main groups of this subclass

Definitions

  • the present disclosure relates to the measurement of the core temperature of an object.
  • the present disclosure relates to the measurement of core temperature of a living organism.
  • T core Physiological human core temperature
  • T core lies between 36.5°C and 37.5°C and values below 36.0°C or above 38.0°C suggest inadequate thermoregulation.
  • Reliable continuous core temperature measurement is important especially in high-risk patients, such as patients undergoing surgery, intensive care unit (1CU) patients, and those highly susceptible to infections due to compromised immune systems due to treatments such as chemotherapy and the like.
  • Abnormal T core can also indicate illness at an early stage and guide appropriate treatment.
  • controlled T core manipulation may be used during surgery or as a therapeutic intervention.
  • mild therapeutic hypothermia is thought to improve the outcome of cardiac arrest and ischemic insult to the brain. Accordingly, reliable T core measurement is of major importance for monitoring patients in many medical situations.
  • thermometers Two measurements are accepted as gold standard for determining T core .
  • the first is measurement of the central blood temperature using a Schwan-Ganz catheter in the pulmonary artery and the second is measurement of the oesophageal temperature using the same catheter arrangement.
  • these intravascular catheter thermometers are generally not suitable in most medical situations due to their highly invasive nature.
  • Alternative external, and less accurate, measurement sites include tympanic (ear), axial (underarm), rectal and under the tongue, these sites all being presently used for body temperature measurement.
  • placement of the thermometer probe in these sites can cause discomfort to the patient and is unsatisfactory for long-term use, especially in awake patients. Furthermore, these measurements can induce complications.
  • the direct measurement of body core temperature from the skin surface has, as a result, been considered a desirable method for some time.
  • One of the major problems encountered in non-invasive measurements of core body temperature is related to the thermal properties of the skin.
  • the thermal conductivity of the skin is generally poor and is strongly influenced by the skin blood flow and ambient environment temperatures.
  • the most widely used technique to determine heat loss from the skin is thermal insulation. If an ideal thermal insulating pad is applied to the skin surface, heat loss from this area will be reduced to zero, and after a while the skin surface temperature beneath the pad will be in equilibrium with the deep tissue temperature.
  • a temperature sensor for measuring a core temperature of an object including:
  • first temperature sensing element configured for placement in thermal contact with the object; a second temperature sensing element spaced from the object and the first temperature sensing element, wherein the first and second temperature sensing elements are separated by a first thermal insulator region having a first temperature dependent thermal resistance R 1 ;
  • a third temperature sensing element configured for placement in thermal contact with the object; a fourth temperature sensing element spaced from the object and the third temperature sensing element, wherein the third and fourth temperature sensing elements are separated by a second thermal insulator region having a second temperature dependent thermal conductivity R 2 ;
  • a fifth temperature sensing element located to measure an ambient temperature T 0 .
  • the first and second temperature sensing elements and the first thermal insulator region form a first heat flow arrangement for conducting heat from a core region of the object.
  • the first heat flow arrangement includes a first heat sink region to promote heat flow in the first heat flow arrangement.
  • the first heat sink region is in thermal contact with the second temperature sensing element.
  • the second and third temperature sensing elements and the second thermal insulator region form a second heat flow arrangement for conducting heat from the core region of the object.
  • the second heat flow arrangement includes a second heat sink region to promote heat flow in the second heat flow arrangement.
  • the second heat sink region is in thennal contact with the fourth temperature sensing element.
  • the temperature sensor includes an insulating bamer for thermally isolating the first heat flow arrangement and the second heat flow arrangement from each other.
  • the insulating barrier thennally isolates the fifth temperature sensing element from the first and second heat flow arrangement.
  • the second temperature sensing element is located substantially on top of and spaced from the first temperature sensing element.
  • the first thermal insulator region or the second thermal insulator region is formed from a solid material.
  • the first thermal insulator region and the second thermal insulator region are formed from a solid material.
  • the first thermal insulator region and the second thennal insulator region are formed from the same solid material.
  • the first and/or third temperature sensing element are in physical contact with the object.
  • the temperature sensor is configured to measure the core body temperature of a living organism.
  • the temperature sensor includes a flexible base portion for placement on the living organism. [0024] In another form, the temperature sensor includes an adhesive portion for attachment to the living organism.
  • the temperature sensor is configured for use for humans.
  • the present disclosure provides a temperature sensing system including: the temperature sensor of the first aspect; and
  • a data processor to detennine the core temperature of the object based on the temperatures T 1 , T 2 , T 3 , T 4 and T 0 measured by first, second, third, fourth and fifth temperature sensing elements respectively.
  • the data processor determines a ratio K(T 0 )of the thermal resistances and R 2 based on the measured ambient temperature T 0 .
  • the data processor determines the core temperature T core based on the relationship:
  • the data processor determines the core temperature T core based on the relationship:
  • the processor unit is located remotely from the temperature sensor. [0031 ] In another form, the processor unit communicates wirelessly with the temperature sensor.
  • the processor unit is integrated with the temperature sensor.
  • Figure 1 is a figurative overview diagram of a temperature sensor for measuring the core temperature of an object in accordance with an illustrative embodiment
  • Figure 2 is a top perspective view of a temperature sensor for measuring the core temperature of a living organism in accordance with an illustrative embodiment
  • Figure 3 is an exploded view of the temperature sensor illustrated in Figure 2;
  • Figure 4 is a side sectional view of the temperature sensor illustrated in Figure 2;
  • Figures 5A to 5C are example temperature sensing systems based on the temperature sensor illustrated in Figures 2 to 4;
  • Figure 6 is a side view of the insulator blocks illustrated in Figures 2 to 4 depicting relevant dimensions
  • Figure 7 is a graph of K(T 0 ) as a function of T 0 for the insulator block configuration illustrated in Figure 6;
  • Figure 8 is a figurative overview diagram of a temperature sensor set up illustrating the various physical parameters
  • Figure 9 is an exploded view of a temperature sensor in accordance with another illustrative embodiment.
  • Figure 10 is a side sectional view of the temperature sensor illustrated in Figure 9.
  • FIG. 1 there is shown a figurative overview diagram of a temperature sensor 100 for measuring the core temperature of an object 200 according to an illustrative embodiment.
  • Temperature sensor 100 includes in this embodiment a temperature sensing arrangement consisting of first temperature sensing element 121 , second temperature sensing element 122, third temperature sensing element 123, fourth temperature sensing element 124 and fifth temperature sensing element 125.
  • first and third temperature sensing elements 121, 123 are both configured for placement in thermal contact with the surface of the object 200. As would be appreciated, this does not require sensing elements 121 , 123 to be in physical contact with the object and in this case a high thermally conductive metallic disc 140 is employed to sample a larger surface area of the object 200.
  • Second temperature sensing element 122 is positioned so that it is spaced from the object 200 and the first temperature sensing element 121 by a first thermal insulator region 13 1 having a first thermal resistance and forms a first heat flow arrangement that conducts heat from a core region of the object having the core temperature.
  • fourth temperature sensing element 124 is positioned so that it is spaced from the object 200 and the third temperature sensing element 123 by a second thermal insulator region 132 having a first thermal resistance R 2 and forms a second heat flow arrangement that conducts heat from the core region of the object.
  • first and second thermal insulator regions 131 , 132 are shown as comprising a solid material or insulator block but as would be appreciated, these regions may be provided by a suitable air gap or the like.
  • the fifth temperature sensing element 125 is located to measure the ambient temperature remote from object 200.
  • temperature sensor 100 further includes a housing 130 comprising a highly insulating material that thermally isolates first thermal insulator region 13 1 and associated first and second temperature sensing elements 121 , 122 from second thermal insulator region 132 and associated third and fourth temperature sensing elements 123, 124.
  • the heat flow / through the thermal insulator may be calculated by the following equation assuming there is a constant and vertical heat flow from the heat source T core to the surface of the thermal insulator:
  • R s is the thermal resistance of the thermal insulator corresponding to object 200 (eg, skin and hypodermic tissue) and T s is the temperature at the surface of the thermal insulator (eg, skin surface).
  • T u is the temperature at the external boundary of the second insulator and R u is the thermal resistance of the second insulator.
  • Tcore relationship requires the knowledge of the thermal resistance value R s of the skin and hypodermic tissue. Unfortunately, this cannot be accurately measured and is significantly influenced by the varying hypodermic blood flow.
  • ⁇ 1 and T 3 are the object temperatures below the two thermal insulator regions 131 , 132 at the surface of the object as measured by first and third temperature sensing elements 121 , 123, and T 2 and T 4 are the temperatures at the upper surface boundary of each of the thermal insulator regions 131 , 132 as measured by second and fourth temperature sensing elements 122, 124.
  • K is defined to be the ratio of the thermal resistances, R 1 /R 2 .
  • both R ⁇ and R 2 vary as a function of the ambient temperature T 0 surrounding the thermal insulator regions 131 , 132 as measured by the fifth temperature sensing element 125, which to a good approximation will be equivalent, and hence K will also vary as a function of ambient temperature.
  • the function K(T Q ) may be determined experimentally through measuring the thermal resistances R 1 and R 2 over an operating temperature range. In this manner, T core may be determined without having to determine the thermal resistance of the object.
  • FIGS 2 to 4 there are shown various views of a temperature sensor 200 for measuring the core temperature of a living organism 300 such as a human or animal according to a second illustrative embodiment.
  • Temperature sensor 200 includes a flexible base or substrate portion 260 formed of polyurethane rubber having an underside adhesive portion 261 for attachment to the skin.
  • base portion 260 is formed having a straight sided oval configuration includes two circular shaped cut-out portions 262 located either side of base portion 260 and each shaped to receive a thermal conductive annulus or ring member 240 which receives in its central aperture the respective temperature sensing element as will be described below.
  • Ring member 240 not only enhances temperature conduction but also assists in reducing the effects of radiant heat transfer to provide a homogeneous temperature at the respective sensor sites.
  • temperature sensor 200 incorporates a temperature sensing arrangement consisting of first temperature sensing element 221 , second temperature sensing element 222, third temperature sensing element 223, fourth temperature sensing element 224 and fifth temperature sensing element 225.
  • the temperature sensing elements are negative temperature coefficient (NTC) thermistors but as would be appreciated these sensing elements may be any thermosensitive device including, but not limited to, positive temperature coefficient (PTC) thermistors, resistance temperature detectors (RTD), thermocouples, silicone bandgap temperature sensors or crystal temperature sensors.
  • NTC negative temperature coefficient
  • PTC positive temperature coefficient
  • RTD resistance temperature detectors
  • thermocouples silicone bandgap temperature sensors or crystal temperature sensors.
  • First and third temperature sensing elements 221 , 223 are located in their respective thermal conductive ring members 240 and this assembly then resides in the respective cut-out portion 262 of the flexible base portion 260. In this manner, first and third temperature sensing elements 221 , 223 will be in direct physical contact with the skin once temperature sensor 200 has been attached. Situated above, and in thermal contact with, the first and third temperature sensing elements 221, 223 are respective insulator blocks 231 , 232, which in this embodiment are formed as a cylindrically shaped body of material such as foam, silicone, rubber,plastic or equivalent material having a well behaved thermal resistance as a function of temperature. Other examples of suitable materials include, but are not limited to, aluminium (or other metals), polytetrafluoroethylene (PTFE) or nylon.
  • PTFE polytetrafluoroethylene
  • thermal insulator regions in the form of insulator blocks 231 , 232 are formed of the same material but have different nominal thermal resistances R 1 and R 2 due to their size.
  • insulator blocks 231 , 232 may be of the same size but formed from different material hence providing differing nominal thermal resistances R ⁇ and R 2 .
  • second temperature sensing element 222 is spaced from first temperature sensing element 221 and the surface of the skin with the first and second temperature sensing elements 221, 222 separated by insulator block 23 1.
  • fourth temperature sensing element 224 is spaced from third temperature sensing element 223 and the surface of the skin with the first and second temperature sensing elements 224, 223 separated by insulator block 232.
  • the second and fourth temperature sensing element 222, 224 are located substantially on top of and spaced from the first and third temperature sensing elements 221, 223 respectively.
  • Insulating barrier 250 Surrounding insulator blocks 231 , 232 is an insulating barrier 250 having two cylindrical shaped receiving areas 251 , 252 which are sized and shaped to isolate each insulator block and the associated temperature sensing elements from each other.
  • Insulating barrier 250 is formed from a material having a high relative thermal resistivity relative to insulator blocks 23 1 , 232 and is configured to be attached to flexible base portion 260.
  • the insulating barrier 250 is formed from silicone.
  • the insulating barrier 250 is formed from cellular polyurethane foam.
  • Fifth temperature sensing element 225 is located external to insulating barrier 250 and measures the ambient temperature.
  • Temperature sensor 200 further includes a protective housing or casing 230 that attaches to a stepped recessed region 263 in the base portion 260 to form the sensor package.
  • Temperature sensor 200 in this embodiment is formed having a layered structure.
  • the first layer consists of the first and third temperature sensing elements 221, 223 which are in thermal contact with the skin.
  • the second layer consists of the thermal insulator regions or insulator blocks 231 , 232 and the third layer consists of the second and fourth temperature sensing elements 222, 224.
  • the fifth layer consists of the fifth temperature sensing element 225 and housing 230.
  • this layered structure or assembly facilitates manufacturing and each of the layers may be made of appropriate materials and sealed with respect to each other making the device especially suitable for medical applications.
  • the layers may be formed of flexible material to conform with the region whose core temperature is being measured.
  • temperature sensor may be sealed to provide water resistance.
  • Temperature sensor 200 further includes an integrated power supply and processing electronics 290 comprising an analogue to digital converter to convert the analogue signal from each of the temperature sensing elements to a temperature value for further processing.
  • temperature sensor 200 further includes a wireless transmission module 295 for transmission of the temperature values for each of the five temperature sensing elements to a data processing unit for determining the core temperature based on the relationship for T core described above and together forming a temperature sensing system.
  • Temperature sensor 200 may be configured as a disposable single use unit or be rechargeable.
  • temperature sensing system includes temperature sensor 200 which sends data by wireless transmission module 295 to smart phone 510 or personal computer 520 or equivalent by a wireless transmission interface.
  • the data may be temperature values and the smart phone 510 or personal computer 520 then functions as a data processor to process these values to determine core temperature.
  • the data sent from temperature sensor relates to raw digitised values from each of the temperature sensing elements which are then further processed to provide temperature values for each of the temperature sensing elements which are then further processed to determine core temperature.
  • the wireless transmission interface may comprise a network interface and/or communications module for communicating with an equivalent communications module in another device using a predefined communications protocol (eg Bluetooth, Zigbee, NFC, ANT & ANT+, IEEE 802.15, IEEE 802. 1 1 , TCP/IP, UDP, etc) and may transmit the wireless signals by one or more intermediate routers or similar wireless transmission devices.
  • a predefined communications protocol eg Bluetooth, Zigbee, NFC, ANT & ANT+, IEEE 802.15, IEEE 802. 1 1 , TCP/IP, UDP, etc
  • FIG. 5B there is shown another example temperature sensing system involving wireless transmission of temperature sensor data to the "cloud” where it is then stored and processed to determine core temperature and where it may then be further accessed by a smart phone 510 or personal computer 520 or equivalent acting in this sense as a "dumb" terminal to display the core temperature data.
  • the raw digitised data from temperature sensing elements is stored in the cloud where it then may be accessed by a smart phone 510 or personal computer 520 for further processing.
  • temperature sensor 200 contains all relevant processing electronics for determining core temperature and an integrated display 296 for display of the core temperature.
  • temperature sensor 200 may include a physical network interface and be physically connected by wired means to transmit data for further processing or display by a separate data processor.
  • the temperature data includes a unique identifier and is sent either wirelessly or by wired transmission to enterprise level patient monitoring software responsible for monitoring the health status of a number of patients in a medical facility.
  • FIG. 7 there is shown a graph of the empirically determined function K(T Q ) as a function of T Q for the insulator block configuration illustrated in Figure 6.
  • the graph in Figure 7 may be implemented as a lookup table in order to determine K(T 0 ) for any measured T 0 which is then used in the determination of T core .
  • a function such as a spline function is fitted to provide an analytic formula for K(T Q ) which the measured T Q may be substituted into.
  • Temperature sensor 200 would be typically applied to the torso or upper thoracic region of the body but may also be applied to the head and other regions as required. For example, other regions may include, but not be limited to, placement of sensor 200 over the heart, sternum or liver depending on requirements.
  • flexible base portion 260 with its adhesive underlay 261 allows the sensor 200 to conform and follow the contours of the body surface.
  • temperature sensor 200 may be one of the biological sensors forming part of a wearable intravenous fluid delivery system such as the one described in PCT Publication No WO 2015/03 1938 A l , filed 3
  • FIG. 8 there is shown a figurative view of a temperature sensor set up indicating the various physical parameters employed for determining an alternative derivation of T core based on a configuration where the thermal insulator regions are equivalent but only vary in height. Based on the sensor set up illustrated in Figure 8, the following parameters may be defined:
  • V b temperature difference from T core to top boundary of thermal insulator region 1, ie. T core — T 2 .
  • V ⁇ temperature difference through thermal insulator region 1 , ie, (T 1 — T 2 ).
  • V 2 temperature difference through thermal insulator region 2, ie, (T 3 —T 4 ).
  • V s temperature difference from core to skin surface, ie, (T core —T 3 ).
  • V d temperature difference form top of thermal insulator 2 to top of thermal insulator region 1 , ie, (T 4 - T 2 ).
  • R s thermal resistance of the skin and subcutaneous tissue.
  • R- i thermal resistance of thermal insulator region 1.
  • R 2 thermal resistance of thermal insulator region 2.
  • K is again defined to be the ratio of the thermal resistances, R 1 /R 2 .
  • FIG. 9 shows side sectional and exploded views of a temperature sensor 400 according to another illustrative embodiment.
  • Figure 9 shows an equivalent exploded view to that of Figure 3
  • Figure 10 shows an equivalent sectional view to that of Figure 4, where Figures 3 and 4 are directed to temperature sensor 200.
  • temperature sensor 400 includes an insulating barrier 450 comprising an air gap 458 surrounding each of the thermal insulator regions or insulator blocks 231 , 232.
  • the air gap 458 is formed as an annular cylinder resulting from configuring the two cylindrical shaped receiving members 451 , 452 to have an inner diameter greater than the outer diameter of each of the insulator blocks 231 , 232.
  • Insulating barrier 450 further includes two circular shaped apertures 453, 454 as best seen in Figure 9 which are located centrally on the top or roof of the respective receiving regions 451 , 452 and which each receive the thermally conductive ring member 440 and temperature sensing element 222, 224 assemblies.
  • the conductive ring member 440 and temperature sensing element 222, 224 assemblies are exposed as compared to sensor 200 which as a result generally provides an initially larger temperature differential between the skin surface and the "exposed" temperature sensing elements 222, 224 promoting the flow of heat vertical ly or axially through insulator blocks 231 , 232 as they are not insulated from the ambient environment.
  • the conductive ring members 440 have a greater surface area as compared to ring members 240 providing an enhanced heat sink region that further promotes the flow of heat vertically or axially through insulator blocks 23 1 , 232.
  • the stepped recessed region 463 in the base portion 260 is correspondingly modified to receive this increased diameter and further the circular shaped cut-out portions 462 located either side of base portion 260 have a larger diameter to receive the larger diameter thermal conductive annulus or ring members 240 and their associated respective temperature sensing elements.
  • temperature sensor also includes a housing 230 and the fifth temperature sensing element 225 and in one example, temperature sensing element 225 is attached to the outer surface of housing 230. In another example, also shown in Figure 10 as an alternative, temperature sensing element 225 is attached to the flexible base portion 260.
  • the parameter K(T 0 ) which varies as a function of TO will depend on the configuration of the temperature sensor including the size, type and configuration of the insulator blocks and the size, type and configuration of the insulating barrier. Depending on the design
  • the configuration may be selected so that the behaviour K(T Q ) is optimally characterised over a selected range of ambient temperature of interest.
  • the configuration may be selected so that the variation in K(T 0 ) is minimised over a selected range of ambient temperature.
  • the configuration is selected so that the variation in K(T 0 ) as a function of T 0 is substantially linear over a selected range of ambient temperature.
  • the above described embodiments provide a temperature sensor and sensing system that may be applied externally to the object and in the case of a human patient may be adhered to the skin directly without the need for any invasive procedures or the intrusion of thermometers into a selected body cavity or orifice. This can allow for convenient continuous monitoring of core temperature.
  • the temperature sensing system may also be configured to track temperature trends over extended periods to enable detection of a change in patient health.
  • the temperature sensing system captures the patient temperature over a 24 hour period to determine the patient's temperature circadian cycle as a baseline for health monitoring. In this manner, small changes from the expected temperature at a particular time in the cycle may be detected and an alert generated based on any discrepancy.
  • the data processor implements a machine learning algorithm to recognise these changes in temperature trends based on changes from the baseline temperature variation of a patient. Depending on the severity of the change, the system may then generate an alert signal to the patient and/or to the healthcare professional.
  • the temperature sensor may be combined with additional biometric sensors such as heart rate, respiration or blood oxygen monitors to provide combined monitoring of a patient's condition.
  • additional biometric sensors such as heart rate, respiration or blood oxygen monitors to provide combined monitoring of a patient's condition.
  • a combined temperature, heart rate, respiration and blood oxygen sensor may be placed on the chest to monitor vital signs from the one region.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Epidemiology (AREA)
  • Molecular Biology (AREA)
  • General Physics & Mathematics (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Primary Health Care (AREA)
  • Surgery (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Data Mining & Analysis (AREA)
  • Databases & Information Systems (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

L'invention concerne un capteur de température pour mesurer une température centrale d'un objet. Le capteur comprend un premier élément de détection de température configuré pour être placé en contact thermique avec l'objet et un deuxième élément de détection de température espacé de l'objet et du premier élément de détection de température, les premier et deuxième éléments de détection de température étant séparés par une première région d'isolant thermique ayant une première résistance thermique dépendant de la température R1. Le capteur comprend également un troisième élément de détection de température configuré pour être placé en contact thermique avec l'objet ; un quatrième élément de détection de température espacé de l'objet et du troisième élément de détection de température, les troisième et quatrième éléments de détection de température étant séparés par une seconde région d'isolant thermique ayant une seconde conductivité thermique dépendant de la température R2, et un cinquième élément de détection de température disposé pour mesurer une température ambiante T0.
PCT/AU2018/000026 2017-02-24 2018-02-26 Capteur de température WO2018152566A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2018223205A AU2018223205B2 (en) 2017-02-24 2018-02-26 Temperature sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2017900631 2017-02-24
AU2017900631A AU2017900631A0 (en) 2017-02-24 Temperature sensor

Publications (1)

Publication Number Publication Date
WO2018152566A1 true WO2018152566A1 (fr) 2018-08-30

Family

ID=63252305

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2018/000026 WO2018152566A1 (fr) 2017-02-24 2018-02-26 Capteur de température

Country Status (2)

Country Link
AU (1) AU2018223205B2 (fr)
WO (1) WO2018152566A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109115368A (zh) * 2018-09-13 2019-01-01 浙江大学 一种非侵入式核心温度测量探头及获取核心温度的方法
EP3699570A1 (fr) * 2019-02-19 2020-08-26 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Capteur de température corporelle centrale et son procédé de fabrication
US20210186337A1 (en) * 2018-06-27 2021-06-24 Nippon Telegraph And Telephone Corporation Internal body temperature measurement device and internal body temperature measurement method
WO2022064630A1 (fr) * 2020-09-25 2022-03-31 日本電信電話株式会社 Dispositif de mesure
US11408778B2 (en) 2020-07-21 2022-08-09 Apple Inc. Temperature gradient sensing in portable electronic devices
WO2023049712A1 (fr) * 2021-09-22 2023-03-30 Masimo Corporation Dispositif portable destiné à la mesure non invasive de la température corporelle
US11635334B2 (en) 2020-06-30 2023-04-25 Apple Inc. Miniature external temperature sensing device for estimating subsurface tissue temperatures
US11771329B2 (en) 2020-09-24 2023-10-03 Apple Inc. Flexible temperature sensing devices for body temperature sensing
USD1000975S1 (en) 2021-09-22 2023-10-10 Masimo Corporation Wearable temperature measurement device
US11872156B2 (en) 2018-08-22 2024-01-16 Masimo Corporation Core body temperature measurement
USD1022729S1 (en) 2020-07-27 2024-04-16 Masimo Corporation Wearable temperature measurement device
US11974833B2 (en) 2020-03-20 2024-05-07 Masimo Corporation Wearable device for noninvasive body temperature measurement
USD1037462S1 (en) 2019-08-16 2024-07-30 Masimo Corporation Holder for a patient monitor
USD1048908S1 (en) 2022-10-04 2024-10-29 Masimo Corporation Wearable sensor
US12133717B2 (en) 2015-08-31 2024-11-05 Masimo Corporation Systems and methods for patient fall detection
US12178581B2 (en) 2019-04-17 2024-12-31 Masimo Corporation Patient monitoring systems, devices, and methods
USD1060680S1 (en) 2020-05-11 2025-02-04 Masimo Corporation Blood pressure monitor
USD1066672S1 (en) 2019-08-16 2025-03-11 Masimo Corporation Patient monitor and holder
USD1072837S1 (en) 2020-10-27 2025-04-29 Masimo Corporation Display screen or portion thereof with graphical user interface

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090299682A1 (en) * 2008-05-30 2009-12-03 Medisim Ltd. Surface temperature profile
US20100121217A1 (en) * 2006-12-06 2010-05-13 Koninklijke Philips Electronics N. V. Device for measuring core temperature
US20120109572A1 (en) * 2010-10-29 2012-05-03 Seiko Epson Corporation Temperature measurement device and temperature measuring method
JP2013200152A (ja) * 2012-03-23 2013-10-03 Terumo Corp 体温計

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100121217A1 (en) * 2006-12-06 2010-05-13 Koninklijke Philips Electronics N. V. Device for measuring core temperature
US20090299682A1 (en) * 2008-05-30 2009-12-03 Medisim Ltd. Surface temperature profile
US20120109572A1 (en) * 2010-10-29 2012-05-03 Seiko Epson Corporation Temperature measurement device and temperature measuring method
JP2013200152A (ja) * 2012-03-23 2013-10-03 Terumo Corp 体温計

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12150739B2 (en) 2015-08-31 2024-11-26 Masimo Corporation Systems and methods for patient fall detection
US12133717B2 (en) 2015-08-31 2024-11-05 Masimo Corporation Systems and methods for patient fall detection
US20210186337A1 (en) * 2018-06-27 2021-06-24 Nippon Telegraph And Telephone Corporation Internal body temperature measurement device and internal body temperature measurement method
US11883133B2 (en) * 2018-06-27 2024-01-30 Nippon Telegraph And Telephone Corporation Internal body temperature measurement device and internal body temperature measurement method
US12257183B2 (en) 2018-08-22 2025-03-25 Masimo Corporation Core body temperature measurement
US11872156B2 (en) 2018-08-22 2024-01-16 Masimo Corporation Core body temperature measurement
CN109115368B (zh) * 2018-09-13 2024-02-20 浙江大学 一种非侵入式核心温度测量探头及获取核心温度的方法
CN109115368A (zh) * 2018-09-13 2019-01-01 浙江大学 一种非侵入式核心温度测量探头及获取核心温度的方法
CN113711001A (zh) * 2019-02-19 2021-11-26 荷兰应用科学研究会(Tno) 核心体温传感器及其制造方法
JP2022521735A (ja) * 2019-02-19 2022-04-12 ネーデルランセ オルハニサチエ フォール トゥーヘパスト－ナツールウェーテンシャッペルック オンデルズク テーエヌオー 中核温センサ及びその製造方法
JP7523456B2 (ja) 2019-02-19 2024-07-26 ネーデルランセ オルハニサチエ フォール トゥーヘパスト－ナツールウェーテンシャッペルック オンデルズク テーエヌオー 中核温センサ及びその製造方法
WO2020171701A1 (fr) * 2019-02-19 2020-08-27 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Capteur de température corporelle centrale et procédé de fabrication correspondant
EP3699570A1 (fr) * 2019-02-19 2020-08-26 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Capteur de température corporelle centrale et son procédé de fabrication
US12178581B2 (en) 2019-04-17 2024-12-31 Masimo Corporation Patient monitoring systems, devices, and methods
USD1066672S1 (en) 2019-08-16 2025-03-11 Masimo Corporation Patient monitor and holder
USD1037462S1 (en) 2019-08-16 2024-07-30 Masimo Corporation Holder for a patient monitor
US11974833B2 (en) 2020-03-20 2024-05-07 Masimo Corporation Wearable device for noninvasive body temperature measurement
USD1060680S1 (en) 2020-05-11 2025-02-04 Masimo Corporation Blood pressure monitor
US11635334B2 (en) 2020-06-30 2023-04-25 Apple Inc. Miniature external temperature sensing device for estimating subsurface tissue temperatures
US11408778B2 (en) 2020-07-21 2022-08-09 Apple Inc. Temperature gradient sensing in portable electronic devices
US11781919B2 (en) 2020-07-21 2023-10-10 Apple Inc. Temperature gradient sensing in portable electronic devices
USD1022729S1 (en) 2020-07-27 2024-04-16 Masimo Corporation Wearable temperature measurement device
US11771329B2 (en) 2020-09-24 2023-10-03 Apple Inc. Flexible temperature sensing devices for body temperature sensing
JP7464137B2 (ja) 2020-09-25 2024-04-09 日本電信電話株式会社 測定装置
WO2022064630A1 (fr) * 2020-09-25 2022-03-31 日本電信電話株式会社 Dispositif de mesure
USD1072837S1 (en) 2020-10-27 2025-04-29 Masimo Corporation Display screen or portion thereof with graphical user interface
USD1050910S1 (en) 2021-09-22 2024-11-12 Masimo Corporation Portion of a wearable temperature measurement device
USD1000975S1 (en) 2021-09-22 2023-10-10 Masimo Corporation Wearable temperature measurement device
WO2023049712A1 (fr) * 2021-09-22 2023-03-30 Masimo Corporation Dispositif portable destiné à la mesure non invasive de la température corporelle
USD1048908S1 (en) 2022-10-04 2024-10-29 Masimo Corporation Wearable sensor

Also Published As

Publication number Publication date
AU2018223205B2 (en) 2023-05-18
AU2018223205A1 (en) 2019-09-19

Similar Documents

Publication Publication Date Title
AU2018223205B2 (en) Temperature sensor
CN110121291B (zh) 用于确定温度的贴片
US11109764B2 (en) Single heat flux sensor arrangement
US11083415B2 (en) Vital-signs patch having a strain relief
Parihar et al. Heartbeat and temperature monitoring system for remote patients using Arduino
JP6666446B2 (ja) 熱流センサ
KR102439668B1 (ko) 고막 온도를 측정하도록 구성된 휴대용 생리 모니터
EP2459976B1 (fr) Capteur et procédé pour déterminer la température corporelle centrale
US10820802B2 (en) Wearable patch for patient monitoring
US20120029307A1 (en) Vital-signs monitor with spaced electrodes
CA2583034C (fr) Bandage avec capteurs
CN114206208B (zh) 用于确定人的深层内部温度的温度测量设备和系统
JP7340600B2 (ja) センサ、生体の深部温度を推定する方法、及びセンサを使用する方法
JP2018529481A (ja) 深部体温測定のためのシステム及び方法
Wartzek et al. Temperature measurement
US10575732B2 (en) Body-worn thermometry solutions
JP2022504314A (ja) 生体の心音、循環効果及び深部温度を継続的に無線で監視及び分析するセンサシステム及び方法
CN110742591B (zh) 肚脐测量肠道核温的无创测量方法和设备
Kassanos et al. Towards a flexible wrist-worn thermotherapy and thermoregulation device
JP2007037631A (ja) 体温計及び体温計用断熱材
Tamura et al. Body temperature, heat flow, and evaporation
Ghatole et al. Healthcare System with Interactive Biosensors
Rotariu et al. Medical system based on wireleless sensors for real time remote monitoring of people with disabilities
WO2025024314A1 (fr) Capteurs sans fil multiplexés pour surveillance physiologique
AU2024201562A1 (en) Core and peripheral body temperature monitoring using an ear audio device.

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18757647

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018223205

Country of ref document: AU

Date of ref document: 20180226

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 18757647

Country of ref document: EP

Kind code of ref document: A1

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载