WO2013177112A1 - Patch thermochromatique pour surveiller/détecter la température corporelle - Google Patents

Patch thermochromatique pour surveiller/détecter la température corporelle Download PDF

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Publication number
WO2013177112A1
WO2013177112A1 PCT/US2013/041950 US2013041950W WO2013177112A1 WO 2013177112 A1 WO2013177112 A1 WO 2013177112A1 US 2013041950 W US2013041950 W US 2013041950W WO 2013177112 A1 WO2013177112 A1 WO 2013177112A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermocromatic
substrate
predetermined temperature
group
agent
Prior art date
Application number
PCT/US2013/041950
Other languages
English (en)
Inventor
Allison Fredericks
Dan C. Short
Albert B. Ouimet
Bryan S. Short
Original Assignee
Hot Dot, Inc.
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 US13/477,771 external-priority patent/US20130131540A1/en
Application filed by Hot Dot, Inc. filed Critical Hot Dot, Inc.
Publication of WO2013177112A1 publication Critical patent/WO2013177112A1/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
    • A61B2503/00—Evaluating a particular growth phase or type of persons or animals
    • A61B2503/10—Athletes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2503/00—Evaluating a particular growth phase or type of persons or animals
    • A61B2503/40—Animals
    • 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
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/6804—Garments; Clothes
    • 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
    • A61B5/6831—Straps, bands or harnesses
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/74—Details of notification to user or communication with user or patient ; user input means
    • A61B5/742—Details of notification to user or communication with user or patient ; user input means using visual displays

Definitions

  • the present invention relates generally to thermocromatic devices and, more particularly, to such a device for detecting/monitoring body temperature in an accurate, efficient and inexpensive manner.
  • the present invention relates to a thermocromatic device for monitoring body temperature.
  • a thermocromatic device for monitoring body temperature.
  • Such a device incorporates a thermocromatic ink developed to indicate, by changing color, a point where a preset temperature has been reached.
  • Thermocromatic inks are nanoencapsulated and are extremely accurate. They also provide an efficient and inexpensive means to monitor body temperature.
  • thermocromatic devices incorporating a thermocromatic ink that changes temperature in a range of from 99° F to 101° F can be used to predict the point where a human's body core temperature has begun to reach a dangerous level.
  • the individual wearing the device may be removed from ongoing physical activity before suffering from heat stroke. This benefits athletes, hikers, those in the military and anyone in an environment creating risk of hyperthermia or hypothermia.
  • thermocromatic devices are also useful for many other applications including but not limited to monitoring temperature to determine when a woman is ovulating, monitoring temperature to determine when another animal such as a horse is ovulating, determining when an animal such as a racehorse is in danger of overheating and undergoing heat exhaustion/heat stress, or even as a thermographic device.
  • Such thermographic devices are useful as an aid (a) in diagnosing long term pain, deep vein thrombosis and conditions that affect peripheral circulation as well as (b) in the detection of tumors.
  • thermocromatic device for detecting body temperature.
  • the device comprises a substrate and a thermocromatic composition on the substrate.
  • the thermocromatic composition includes a thermocromatic agent that changes color to a predetermined color indicative of a temperature related condition to be detected.
  • the thermocromatic device may also include an adhesive for positively securing the substrate to the skin on the body to be monitored.
  • the thermocromatic composition includes between about 0.1 and about 75.0 weight percent thermocromatic agent, between about 0.1 and about 1.0 weight percent negatively charged ionizing agent and the remainder carrier.
  • thermocromatic agent is selected from a group consisting of a thermocromatic ink, a thermocromatic liquid crystal ink, a chiro nematic liquid crystal ink, cholesteryl nonanoate, a cyanobisphenyl, a combination of cholesteryl and nematic inks, a mixture of chiral nematic and cholesteric esters, mixture of leuco dyes with a weak acid, a mixture of crystal violet lactone, a spirolactone, a fluoran, a spiropyran, a fulgide, or a fulgide with bisphenol A, a paraben, octadecylphosphoric acid, a 1,2,3-triazole derivative or 4- hydroxycoumarin, a mineral oxide, zinc oxide, lead oxide, cuprous mercury iodide, mercury iodide, nickel sulfate, a chromium rich pyrope, a chry
  • the substrate may be woven, knit or non-woven.
  • the substrate may be made from a material selected from a group consisting of a natural fiber, a synthetic fiber, cotton, polyester, nylon, rayon, silk, wool, cotton blends, polyester blends and mixtures thereof.
  • the adhesive may be selected from a group consisting of flexible silicones, epoxies, acrylics, and mixtures thereof.
  • the substrate may take a number of forms including, but not limited to, a patch, a scarf, a shirt, a headband, a wristband, a sweatband, a t-shirt, a compression jersey, a necklace and a pair of compression shorts.
  • the predetermined temperature at which the thermocromatic agent changes color is typically between 95°F and 105°F. Depending upon the particular application, the predetermined temperature may be in any one of the following ranges 99°-101°F, 100°-101°F, about 100°F, 95°-97°F, and about 96°F.
  • the negatively charged ionizing agent may be selected from a group consisting of diatomaceous earth, hydrated aluminosilicate minerals, zeolite, choline chloride, modified polyolefins and mixtures thereof.
  • the carrier may be selected from a group consisting of water, alcohol, polyols, phthalates, plastisols, polyvinyl alcohol and mixtures thereof.
  • a method of monitoring body temperatures in animals comprises positioning a thermocromatic device into intimate contact with skin of the animal wherein the thermocromatic device changes color to a predetermined temperature indicative of a temperature related physical condition to be detected.
  • the method may also include the step of adhering the thermocromatic device to the skin.
  • the method includes elastically biasing the thermocromatic device into close engagement with the skin.
  • the method may include using a flexible substrate in the thermocromatic device capable of following the surface of the skin during bodily movements
  • Figure 1 illustrates one possible embodiment of the present invention comprising a patch treated with a thermocromatic composition that changes color at a predetermined temperature indicative of a temperature related condition to be detected.
  • thermocromatic device 10 comprising a substrate 12 treated with a thermocromatic composition illustrated at 14.
  • the device 10 may also include an optional adhesive layer 16.
  • the substrate 12 typically comprises a textile structure which may be woven, knit or even non- woven.
  • the substrate 12 may be made from a natural fiber, a synthetic fiber, cotton, polyester, nylon, rayon, silk, wool, cotton blends, polyester blends and mixtures thereof typically utilized by the textile and medical industries.
  • the substrate 12 takes the form of a patch.
  • the substrate 12 may take a number of other forms including but not limited to a scarf, a shirt, a headband, a wristband, a sweatband, a t-shirt, a compression jersey, a necklace or even a pair of compression shorts.
  • the thermocromatic composition 14 is engineered to change color at a predetermined color indicative of a condition to be detected.
  • the thermocromatic composition 14 includes between about 0.1 and about 75.0 weight percent and more typically between 0.1 and 50.0 weight percent, thermocromatic agent, between about 0.1 and about 1.0 weight percent negatively charged ionizing agent and the remainder carrier. Typically, the thermocromatic composition is applied at a rate to provide between 1-2 mils dry thickness.
  • thermocromatic agent is selected from a group consisting of a thermocromatic ink, a thermocromatic liquid crystal ink, a chiro nematic liquid crystal ink, cholesteryl nonanoate, a cyanobisphenyl, a combination of sholesteryl and nematic inks, a mixture of chiral nematic and cholesteric esters, a mixture of leuco dyes with a weak acid, a mixture of crystal violet lactone, a spirolactone, a fluoran, a spiropyran, a fulgide or a fulgide with bisphenol A, a paraben, octadecylphosphoric acid, a 1,2,3-triazole derivative or 4- hydroxycoumarin, a mineral oxide, zinc oxide, lead oxide, cuprous mercury iodide, mercury iodide, nickel sulfate, a chromium rich pyrope, a
  • the negatively charged ionizing agent may be selected from a group consisting of diatomaceous earth, hydrated aluminosilicate minerals, zeolite, choline chloride, modified polyolefins and mixtures thereof. This list is not all inclusive as substantially any compounds capable of providing negatively charged ions may be utilized.
  • the negatively charged ionizing agents provide the presence of increased oxygen due to increased blood flow at the site of the device 10. This increased level of blood and oxygen increases sensitivity of the thermocromatic device and more particularly, the thermocromatic agent thus providing for more effective monitoring of body temperature.
  • Carriers useful for use in the present invention include, but are not limited to water, alcohols, polyols, phthalates, plastisol (a suspension of PVC particles and plasticizer), polyvinyl alcohol and mixtures thereof.
  • a buffer may be added to adjust the pH of the composition to at or near pH7.
  • the adhesive layer may comprise substantially any adhesive useful for securing the device to the skin so that the device stays in place during physical activity even in the presence of sweat, moisture, dirt and water.
  • Some adhesives useful for forming the adhesive layer 16 include but are not limited to flexible silicones, epoxies and acrylics as well as mixtures thereof.
  • a release paper 18 such as a silicone release paper can be used to cover the adhesive layer 16 prior to application.
  • An outer wrapper 20 may be provided for packaging purposes. In order to use the device, one tears open the outer packaging 20, removes the release paper 18 and sticks the device 10 on the skin by placing the device over the desired area and pressing down on the device compressing the adhesive layer 16 against the skin.
  • the device 10 is relatively easy to manufacture.
  • the substrate 12 is impregnated with the thermocromatic composition 14 by any appropriate means such as rotary screen, rotogravure or flexographic printing or by encapsulating the thermocromatic compositions in a clear polymer such as, but not limited to, polyvinyl chloride, polyvinylodine chloride, cellulose acetate, polyethylene, cellophane and the like which can then be laminated to the substrate.
  • the adhesive layer 16 may then be subsequently applied via, for example, kiss coating, spraying, foaming or any other means of application which is capable of applying the adhesive on one surface without affecting the other surface.
  • the adhesive layer 16 can be provided on the substrate 12 prior to treating with the thermocromatic composition.
  • the substrate 12 may also be imprinted with any desired aesthetic design or other indicia.
  • the device may be dye cut or laser cut into any desired shape. Further, it should be appreciated that the device may be provided as a continuous roll, on a card in a clear polyethylene bag for display or in any other appropriate desired manner.
  • the method of monitoring of the present invention comprises positioning a thermocromatic device 10 into intimate contact with the skin of the animal wherein the thermocromatic device changes color at a predetermined temperature indicative of a temperature related physical condition to be detected.
  • the method includes adhering the thermocromatic device 10 to the skin or elastically biasing the thermocromatic device into close engagement with the skin. Further, the method includes using a flexible substrate in the thermocromatic device that is capable of following the surface of the skin during bodily movements.
  • the device 10 and associated method have a number of applications and uses including, but not limited to, monitoring body temperature as an indication of potential for hyperthermia or hypothermia.
  • the device may be used by coaching staffs, trainers and athletes and military personnel as a tool to indicate a raised potential for hyperthermia.
  • the thermocromatic composition incorporates a thermocromatic agent that undergoes a color change between about 99° - 101°F or between about 100° - 101°F or at about 100°F.
  • thermocromatic composition 14 having a thermocromatic agent that changes color between about 95°-97°F or at about 96°F.
  • thermocromatic composition changes color at a predetermined temperature between about 95°F and about 101°F.
  • the predetermined temperature range may run as high as 105°F or even higher.
  • Other potential applications for the device 10 and related method include monitoring body temperature as an indication of potential ovulation in a woman, monitoring body temperature as an indication of potential ovulation in a horse, monitoring body temperature of a horse to determine potential overheating, heat exhaustion/heat stress as well as in various thermography applications.
  • Thermography has been used to aid in diagnosing long term pain. Local skin temperature generally increases due to dilation of the blood vessels: however over a long period of time the temperature can drop. The difference can range from 2° to 7°F.
  • Thermal abnormalities are generally manifested as pain and the present invention can be used to estimate or pinpoint the affected area.
  • Deep vein thrombosis is linked with pulmonary embolism and because a deep vein thrombosis will show a higher temperature and a slower cooling rate in the affected limb, this affect can be measured utilizing the present invention.
  • conditions that affect peripheral circulation generally show a lowering of temperature.
  • Insufficient blood flow to the brain can be measured by thermography. Damaged main arteries cause redirection of blood flow through vessels very close to the skin. Thermography can be used to detect the growth of tumors in breast tissue. Due to the increase in metabolic rate in an active tumor and the change of blood supply, the result is an increase in temperature which can be measured and compared to other unaffected areas of the breasts.
  • the device of the present invention also has potential application in these medical applications.
  • composition useful in the present invention involved screen printing a 95% cotton and 5% spandex circular knit fabric with a combination of cholesteric and chiral nematic inks. These inks were set by specific combination to transition from a clear color to a high visibility yellow color.
  • This combination of cholesteric and chiral nematic inks can also be printed via rotogravure, flexographic and rotary and flat bed screen upon other substrates such as nylon, nylon/spandex, polyester, polyester/spandex, wool, silk, rayon or combinations of these fibers.
  • Other substrates can be, but are not limited to, polyvinyl chloride, polyvinylydene chloride, cellophane, ethyl vinyl acetate.
  • thermochromic inks were combining to achieve bright reds, oranges and limes.
  • the carrier in this case, was water.
  • the thermochromic ink composition included a combination of cholesteric and chiral nematic inks in amounts ranging from about 0.1% to about 5.0% of each. In this specific example the 3.3% cholesteric ink and 2.4% chiral nematic ink was used.
  • the negatively charged ionizing agent is incorporated in an amount ranging from about 0.5% to about 1.0% and the remainder is the carrier. In this specific example 0.5% food grade diatomite (86% silica/5% sodium/3% magnesium/2% iron) was used.
  • the thermochromic ink was rotary screen printed, using a sufficient number of passes (between 1 and 5) to deliver a wet thickness of 150-300 microns (6-12 mils) which will dry to approximately 50-100 microns (2-4 mils).
  • Another useful composition involved screen printing, although rotogravure and flexographic printing can be used, leuco dyes comprised of crystal violet lactones, spirolactones, fluorans and spiropyrans and combinations of these.
  • the 95% cotton and 5% spandex base fabric was a circular knit fabric and it was dyed into a shade of high visibility yellow using fiber reactive dyestuffs.
  • the dyed fabric was over-printed with a Black liquid crystal thermochromic ink which clears or disappears at 100°F to 101 °F, showing the high visibility color underneath.
  • the carrier in this case, was water.
  • This composition included a combination leuco dyestuffs in the amount of 2.0% spirolactone and 1.0% spiropyran.
  • the negatively charged ionizer, food grade diatomite, was incorporated at about 0.5% to about 1.0% and the remainder was carrier.
  • This composition was rotary screen printed, using a sufficient number of passes to achieve good coverage and to deliver a wet thickness of about 150-300 microns (6-12 mils) which will dry to approximately 50-100 microns (2-4 mils).
  • Another useful composition involved dispersing a combination of leuco dyes in a thermoplastic film such as polyvinyl chloride.
  • the film thickness was 15 mils but the film thickness can be adjusted through extrusion to a range of 1 mil up to 20 mils or more.
  • the leuco dyes employed here were mixtures of spirolactones and spiropyrans. These dyes were combined so that the color would clear or disappear at 100° to 101°F.
  • the carrier in this case, was a polyol.
  • This composition was achieved by dispersing 2.5% spirolactone leuco dyes and 2.5% spiropyran leuco dyes into the following formulation:
  • plasticizer (the plasticizer was diisononyl phthalate but it can also be dioctyl phthalate);
  • Another useful composition involves dispersing a combination of liquid crystal thermochromic inks, made from cholesteric inks and chiral nematic inks in such a way that the color changed at 100°F to 101 °F, into a thermoplastic film such as polyvinyl chloride, using a polyol as the carrier.
  • the combination of inks can run between about 0.1% to about 5.0%.
  • the inks would then be dispersed into the liquid polyvinyl chloride batch using the following formulation:
  • plasticizer (the plasticizer can be diisononyl phthalate or dioctyl phthalate); [0043] 3.0% TIXB (2,2,4-Trimethyl-l,3-pentanediol diisobutyrate); [0044] About 0.5% to about 1.0% negatively charged ion donor.
  • TIXB 2,2,4-Trimethyl-l,3-pentanediol diisobutyrate
  • Examples 3 and 4 can use a variety of thermoplastic polymers such as polyvinylydene chloride, ethyl vinyl acetate, cellophane, polystyrenes and polycarbonates and neoprenes and urethanes as substrates into which liquid crystal thermochromic inks or leuco dyes can be dispersed using either water or a polyol as the carrier.
  • thermoplastic polymers such as polyvinylydene chloride, ethyl vinyl acetate, cellophane, polystyrenes and polycarbonates and neoprenes and urethanes

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

La présente invention concerne un dispositif thermochromatique pour détecter la température corporelle qui comprend un substrat traité avec une composition thermochromatique. La composition thermochromatique comprend un agent thermochromatique qui change de couleur à une température prédéterminée indicatrice d'une affection à détecter.
PCT/US2013/041950 2012-05-22 2013-05-21 Patch thermochromatique pour surveiller/détecter la température corporelle WO2013177112A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/477,771 2012-05-22
US13/477,771 US20130131540A1 (en) 2009-04-21 2012-05-22 Thermocromatic patch for monitoring/detecting body temperature

Publications (1)

Publication Number Publication Date
WO2013177112A1 true WO2013177112A1 (fr) 2013-11-28

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PCT/US2013/041950 WO2013177112A1 (fr) 2012-05-22 2013-05-21 Patch thermochromatique pour surveiller/détecter la température corporelle

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018053593A1 (fr) * 2016-09-23 2018-03-29 Context Health Pty Ltd Outil de détection de thrombose veineuse profonde (dvt)
WO2021071352A1 (fr) * 2019-10-09 2021-04-15 De Font Reaulx Rojas Enrique Plaque thermosensible à enregistrements qualitatifs de la température de composant d'organismes vivants au moyen d'un silicium thermosensible
CN115216750A (zh) * 2022-07-28 2022-10-21 河南华福包装科技有限公司 一种氧化硅高阻隔膜、温变高阻隔包装材料及其制备工艺

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100268112A1 (en) * 2009-04-21 2010-10-21 Short Dan C Thermocromatic patch for monitoring/detecting body temperature

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100268112A1 (en) * 2009-04-21 2010-10-21 Short Dan C Thermocromatic patch for monitoring/detecting body temperature

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018053593A1 (fr) * 2016-09-23 2018-03-29 Context Health Pty Ltd Outil de détection de thrombose veineuse profonde (dvt)
WO2021071352A1 (fr) * 2019-10-09 2021-04-15 De Font Reaulx Rojas Enrique Plaque thermosensible à enregistrements qualitatifs de la température de composant d'organismes vivants au moyen d'un silicium thermosensible
CN115216750A (zh) * 2022-07-28 2022-10-21 河南华福包装科技有限公司 一种氧化硅高阻隔膜、温变高阻隔包装材料及其制备工艺

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