WO2015195044A1 - Système de refroidissement portable de corps entier par évaporation pour hyperthermie induite par un exercice physique - Google Patents

Système de refroidissement portable de corps entier par évaporation pour hyperthermie induite par un exercice physique Download PDF

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Publication number
WO2015195044A1
WO2015195044A1 PCT/SG2014/000288 SG2014000288W WO2015195044A1 WO 2015195044 A1 WO2015195044 A1 WO 2015195044A1 SG 2014000288 W SG2014000288 W SG 2014000288W WO 2015195044 A1 WO2015195044 A1 WO 2015195044A1
Authority
WO
WIPO (PCT)
Prior art keywords
conduit
cooling system
cover
gas
inlet
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/SG2014/000288
Other languages
English (en)
Inventor
Seng Sing TAN
Eng Koon LIM
Chin Tiong NG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jurong Health Services
Nanyang Polytechnic
Original Assignee
Jurong Health Services
Nanyang Polytechnic
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
Application filed by Jurong Health Services, Nanyang Polytechnic filed Critical Jurong Health Services
Priority to SG11201607489QA priority Critical patent/SG11201607489QA/en
Priority to PCT/SG2014/000288 priority patent/WO2015195044A1/fr
Publication of WO2015195044A1 publication Critical patent/WO2015195044A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2486—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device with means for supplying liquid or other fluent material to several discharge devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M35/00—Devices for applying media, e.g. remedies, on the human body
    • A61M35/20—Non-portable devices, e.g. spraying booths
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2429—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together after discharge

Definitions

  • This invention relates to a cooling system for treating heat related illnesses.
  • this invention relates to an evaporative cooling system that is portable. More particularly, this invention relates to a portable evaporative cooling system for treating heat related illnesses effectively.
  • EHI Exertional heat illness
  • EHI exertional heat stroke
  • Heat stroke in distance runners is increasing in frequency.
  • athletic trainers should, whenever possible, implement the most effective cooling required immediately.
  • Other classic heat stroke involve passive thermal exposure, normally affecting the elderly in a non-air-conditioned environment or young being abandoned in vehicles during hot weather.
  • Induced hypothermia where the body temperature is purposely lower by a few degrees centigrade, is gaining attention for treating heat stroke patient, as well as beneficial therapy for treatment during and after conditions of hypoxia and ischemia. If cooling is delayed, the benefits decrease as function of time. For example, therapeutic hypothermia resulted in 16% improvement in survival of patients following cardiac arrest, despite the cooling being mild, only 4°C below normal body temperature. Given the time-critical nature of such life threatening emergencies and many of these injuries occur outside of the hospital, the time required to achieve cooling becomes a critical parameter.
  • Current typical cooling methods for induced hypothermia can be divided into two categories: devices that cool the body from outside and devices that are invasive to reduce the core body temperature within the patient.
  • Current external cooling devices such as Flex. Pad by EmCools, ArcticGel by Medivance, cooling blankets or ice bags, which are much simpler to implement, relatively inexpensive and do not pose many of the risk associated with the more invasive internal cooling, especially for patients outside the hospital.
  • such approach is slow.
  • the range of time to achieve 4°C of cooling for these devices spans from more than 2 hours to almost 7 hours.
  • Internal cooling has the best ability to cool locally more rapidly with the use of Peltier cooler but current devices are more invasive, costly and are still not able to provide rapid cooling within the 5-min interval.
  • Cardiopulmonary bypass and recirculating coolants such as Alsius CoolGard 3000 system and Philips InnerCool system can achieve the cooling rate but are currently extremely invasive and require a highly skilled team to implement. Nurses and physicians recognize the limitations of external methods in that they are clinically inefficient, labour intensive and limit access to critically ill patients.
  • a first advantage of a portable evaporative cooling system in accordance with this invention is that the portable evaporative cooling system requires a few components and can be easily used when required.
  • a second advantage of a portable evaporative cooling system in accordance with this invention is that the portable evaporative cooling system is that no electrical power supply is required to work the system.
  • a third advantage of a portable evaporative cooling system in accordance with this invention is that the portable evaporative cooling system includes a few components and hence is portable. This means that the portable evaporative cooling system can be carried to remote areas.
  • a portable evaporative cooling system is configured in the following manner.
  • the portable evaporative cooling system comprises a cover, a first conduit, a second conduit and a number of nozzles.
  • the first conduit is for conveying dry gas while the second conduit is for conveying liquid.
  • Each of the nozzles includes a base with a first inlet in fluid communication with the first conduit, a second inlet in fluid communication with the second conduit, and an outlet.
  • the base defines a first passageway extending between the first inlet and the outlet and a second passageway extending between the second inlet and a tip of the outlet.
  • the nozzles are fitted on the cover with the outlet extending through apertures of the cover.
  • the evaporating cooling system further includes a retractable frame and a blanket coupled to the retractable frame such that when the retractable frame is unfolded, the blanket is support on the retractable frame.
  • the cover comprises an inflatable tube along a perimeter of the cover configured such that when inflated, forms an arc along a width of the cover.
  • the evaporating cooling system further comprises a control valve provided along the first conduit to control the flow of the gas. Another control valve is provided along the second conduit to regulate the flow of liquid.
  • the evaporating cooling system further comprises a number of tube couplings for connecting each of the first inlet of the nozzles with the first conduit, and each of the second inlet of the nozzles with the second conduit.
  • a container containing compressed gas in fluid communication with said first conduit is provided.
  • a container containing liquidised gas in fluid communication with the first conduit is provided.
  • a container containing room temperature water in fluid communication with the second conduit is provided.
  • a kit bag comprising a bag, a portable evaporating cooling system, a gas container with compressed gas and a bottle of liquid is provided.
  • the portable evaporating cooling system, gas container and bottle of liquid are housed in the bag.
  • FIG. 1 illustrating a perspective view of a portable evaporative cooling system in accordance with an embodiment of this invention
  • FIG. 3 illustrating a perspective view of a frame in accordance with an embodiment of this invention.
  • This invention relates to a cooling system for treating heat related illnesses.
  • this invention relates to an evaporative cooling system that is portable. More particularly, this invention relates to a portable evaporative cooling system for treating heat related illnesses effectively.
  • Heat exhaustion patient has a body temperature of as high as 40°C. It is important to cool the body as fast as possible, preferably within 5 minutes, before causing complication arises. Ideally, the body temperature has to be brought down to less than 39°C within 30 minutes at a rate not less than 0.15°C/min.
  • using current approaches such as ice packs or gel pads to cool the body is not fast enough and using ice-water immersion to quench the body could have adverse effects.
  • Most existing systems available for evaporative cooling are not portable. The main objective is to improve the management of a heat stroke patient by initiating an early effective cooling procedure.
  • thermodynamics Based on the psychrometry theory in the thermodynamics, it is known that the evaporating rate of water could be moderated by the air flow rate over a damp surface as well as the relative humidity of the circulating air. Like the cooling tower, heat energy removed from water through the evaporating process could result in a reasonable decrease in the water temperature. Besides manipulating the flow rate, we could also supply air or gas with a lower humidity to improve the evaporating cooling effect.
  • Our preliminary study shows that sprinkling of water at 22.7°C can cool to 18.8°C on a path of airflow at room conditions. The water of the same temperature can be further lower to approximately 16°C by the evaporative cooling using a dryer-air flow concept.
  • the relative humidity depends very much on the air-supply temperature and its relative humidity.
  • an appropriated dryness of air flow say a relative humidity of 25%
  • the air of even as high as 29°C can achieve an effective cooling effect of 16°C by the evaporative cooling based on the wet-bulb temperature reading from the chart.
  • better control over the dry air supply temperature or velocity would in turn optimise the evaporation rate of the water, resulting cooler mists.
  • a portable evaporative cooling system is provided to create cooled mists from unpressurised room-temperature water through the use compressed gas or liquidised gas connected to rows of atomisers attached to a foldable frame or a lightweight blanket.
  • the portable evaporative cooling system uses atomisers together with a method of supplying continuous flow of dehumidified air to create massive cooling-mist flow over heat exhaustion patients. Further details of the portable evaporative cooling system will be described below.
  • FIG. 1 shows a portable evaporative cooling system 100.
  • the portable evaporative cooling system 100 includes a first conduit 1 10, a second conduit 120, a number of nozzles 130-134, and a cover 140.
  • a liquid container 180 is connected to the second conduit 120 for supplying liquid.
  • a gas container 190 is connected to the first conduit 1 10 for supplying gas. Compressed gas kept in an insulated, portable, refillable carrying gas container 190 may be used for consistent supply of pressurised gas. Alternatively, liquidised gas could be used. When the liquidised gas evaporates, the latent heat absorbed cools the whole system. This means that the supply gas for patient delivery will be cooler.
  • a valve control on the portable gas container 190 may be provided to enable a user to adjust an appropriate gas flow rates.
  • Gas container 190 is in fluid communication with the nozzles 130-134 via first conduit 110.
  • a first control valve 170 is provided between the first conduit 110 and the gas container 190 to regulate the flow of the gas being supplied to the nozzles 130-134.
  • Liquid container 180 is any container for holding liquid such as a small water container, water bottle, water bag, or pail. Liquid container 180 is in fluid communication with the nozzles 130- 34 via second conduit 120. A second control valve 175 is provided between the second conduit 120 and the liquid container 180 to regulate the flow of the liquid being supplied to the nozzles 130- 34.
  • First conduit 1 10 and second conduit 120 are flexible tubing for conveying gas and liquid respectively.
  • Figure 2 shows a magnified view of a nozzle 130. As shown in figure 2, each of the nozzles 130-134 includes a base 200 having a first inlet 210, a second inlet 220, and an outlet 230. A first passageway 240 and a second passageway 250 are defined within the base 200.
  • the first inlet 210 is in fluid communication with the first passageway 240 and is adaptable to connect to one end of first conduit 1 10 to receive gas supply from gas container 190.
  • the second inlet 220 is in fluid communication with the second passageway 250 and is adaptable to connect to one end of the second conduit 120 to receive liquid supply from the liquid container 180.
  • Tube couplings are provided to connect the first inlet 210 with the first conduit 110, and second inlet 250 with the second conduit 120.
  • the outlet 230 extends through the aperture 141.
  • the first passageway 240 extends between the first inlet 210 and outlet 230.
  • the second passageway 250 extends between the second inlet 220 and the tip 231 of the outlet 230.
  • the first passageway 240 has a narrower radius compared to the second passageway 250.
  • the second passageway 250 extends to the tip 231 of outlet 230.
  • a higher velocity of gas flowing out from outlet 230 results in a lower static pressure in the second passageway 250.
  • the relatively lower static pressure in the second passageway 250 will draw or extract liquid from the liquid container 180 and dispense out of the outlet 230 without an electrical pump.
  • nozzles 130-134 function as an atomiser nozzle to dispense gas and liquid.
  • the high velocity flow rate at the outlet 230 will also draw in the surrounding air and amplify the flow rate.
  • the cover 140 is adapted to cover and/or isolate the patient. This shields the patient from direct sunlight and isolates the patient from the surrounding environment.
  • the cover 140 is a flexible sheet of material which includes apertures 141-145 adapted to fit the nozzles 130-134 with at least the outlets extending therethrough.
  • the apertures 141-145 are distributed on the surface of the flexible sheet.
  • the cover 140 has a length and a width. When not in use, the cover 140 is folded and stored in a kit bag. When required, the cover 140 is unfolded forming an arc along the width. As shown in figure 1 , the apertures are distributed along the length of the cover 140 and at the top of the " arc.
  • the apertures are distributed along the length of the cover 140 and at the top of the " arc.
  • other arrangement may be implemented without departing from the invention.
  • a frame as shown in figure 3 may be provided.
  • the frame includes flexible rods 310-312 having a length longer than the width of the cover such that when the flexible rods are fitted along the width of the cover 140, the cover 140 forms an arc.
  • a pair of rods is fitted along the sides of the cover 140.
  • a retractable frame may be provided. After unfolding of the retractable frame, the cover 140 may be supported on the retractable frame.
  • the cover 140 may include inflatable tube arranged along the perimeter of the cover such that when inflated, the cover forms an arc along the width of the cover 140.
  • the first control valve 170 may be provided at the first conduit 110 to control the velocity of the gas supply from the gas container 190.
  • the second control valve 175 may be provided at the second conduit 120 to control the velocity of the liquid supply from the liquid container 190.
  • figure 1 shows only two control valves, one skilled in the art will recognise that more than two control valves may be used without departing from the invention. This allows optimising the evaporative cooling effect with only a small amount of water being used. In other words, by controlling the flow rate of the gas supply and regulating the flow of the liquid supply, the ratio of the gas and liquid to be dispensed from the nozzles 130-134 can be manipulated to improve the evaporating process.
  • the portable evaporative cooling system consists of only a portable compressed or liquidised gas container for supplying gas and a small liquid container connected to rows of atomiser nozzles attached to a foldable frame or a lightweight blanket. Minimal setup procedure is required since the cooling system include a few components. Hence, the system can be easily deployed when required. Since the portable evaporative cooling system has to be portable, the total weight of the system is preferably as light as possible. When the cover is unfolded, the length of the cover should be long enough to cover most part of the body and the width should be wide enough to form an arc to a certain height to accommodate a heat stroke patient in it and the row of nozzles shall be positioned just above the patient lying under the cover.
  • the cooling system When not in used, the cooling system can be packed into a portable kit such as like a backpack that can be easily carried by an individual.
  • the portable evaporative cooling system can be deployed in an ambulance or helicopter during standbys. When the ambulance is being deployed, the cooling system can be delivered together with patient on the stretcher in ambulance or helicopter.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

La présente invention concerne un système de refroidissement portable par évaporation. Le système de refroidissement portable par évaporation comprend un couvercle, un premier conduit, un second conduit et un certain nombre de buses. Le premier conduit est conçu pour acheminer un gaz sec, tandis que le second conduit est conçu pour acheminer un liquide. Chacune des buses comprend une base avec une première entrée en communication fluidique avec le premier conduit, une seconde entrée en communication fluidique avec le second conduit, et une sortie. La base définit un premier passage s'étendant entre la première entrée et la sortie, et un second passage s'étendant entre la seconde entrée et une extrémité de la sortie. En outre, les buses sont montées sur le couvercle avec la sortie s'étendant à travers des ouvertures du couvercle.
PCT/SG2014/000288 2014-06-17 2014-06-17 Système de refroidissement portable de corps entier par évaporation pour hyperthermie induite par un exercice physique Ceased WO2015195044A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SG11201607489QA SG11201607489QA (en) 2014-06-17 2014-06-17 A portable whole-body evaporative cooling system for exercise-induced hyperthermia
PCT/SG2014/000288 WO2015195044A1 (fr) 2014-06-17 2014-06-17 Système de refroidissement portable de corps entier par évaporation pour hyperthermie induite par un exercice physique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2014/000288 WO2015195044A1 (fr) 2014-06-17 2014-06-17 Système de refroidissement portable de corps entier par évaporation pour hyperthermie induite par un exercice physique

Publications (1)

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WO2015195044A1 true WO2015195044A1 (fr) 2015-12-23

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PCT/SG2014/000288 Ceased WO2015195044A1 (fr) 2014-06-17 2014-06-17 Système de refroidissement portable de corps entier par évaporation pour hyperthermie induite par un exercice physique

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SG (1) SG11201607489QA (fr)
WO (1) WO2015195044A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10905536B2 (en) * 2017-03-13 2021-02-02 Andrew Neupert Apparatus for treatment of poultry

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5405371A (en) * 1987-10-05 1995-04-11 Augustine Medical, Inc. Thermal blanket
US5807332A (en) * 1994-03-22 1998-09-15 Augustine Medical, Inc. Tube apparatus for warming intravenous fluids within an air hose
US5860292A (en) * 1997-08-26 1999-01-19 Augustine Medical, Inc. Inflatable thermal blanket for convectively cooling a body
EP1604950A1 (fr) * 2003-03-11 2005-12-14 Mayekawa Mfg. Co., Ltd. Procede de production d'azote pateux et appareil permettant de mettre en oeuvre ledit procede
US20080093356A1 (en) * 2006-10-18 2008-04-24 Gian Vittorio Pizzi Portable hypothermia treatment pad and kit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5405371A (en) * 1987-10-05 1995-04-11 Augustine Medical, Inc. Thermal blanket
US5807332A (en) * 1994-03-22 1998-09-15 Augustine Medical, Inc. Tube apparatus for warming intravenous fluids within an air hose
US5860292A (en) * 1997-08-26 1999-01-19 Augustine Medical, Inc. Inflatable thermal blanket for convectively cooling a body
EP1604950A1 (fr) * 2003-03-11 2005-12-14 Mayekawa Mfg. Co., Ltd. Procede de production d'azote pateux et appareil permettant de mettre en oeuvre ledit procede
US20080093356A1 (en) * 2006-10-18 2008-04-24 Gian Vittorio Pizzi Portable hypothermia treatment pad and kit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10905536B2 (en) * 2017-03-13 2021-02-02 Andrew Neupert Apparatus for treatment of poultry

Also Published As

Publication number Publication date
SG11201607489QA (en) 2016-10-28

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