US20150133861A1 - Thermal management system and method for medical devices - Google Patents
Thermal management system and method for medical devicesDownload PDFInfo
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- US20150133861A1 US20150133861A1US14/538,339US201414538339AUS2015133861A1US 20150133861 A1US20150133861 A1US 20150133861A1US 201414538339 AUS201414538339 AUS 201414538339AUS 2015133861 A1US2015133861 A1US 2015133861A1
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- Prior art keywords
- thermally conductive
- power supply
- heat shield
- housing
- mounting clamp
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- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/1414—Hanging-up devices
- A61M5/1415—Stands, brackets or the like for supporting infusion accessories
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20409—Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M2005/1401—Functional features
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3368—Temperature
- A61M2205/3372—Temperature compensation
- 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
- A61M2209/00—Ancillary equipment
- A61M2209/08—Supports for equipment
- A61M2209/082—Mounting brackets, arm supports for equipment
Definitions
- the disclosurerelates to a system and method for providing thermal management in medical devices.
- IEC 60601-1 3 rd Editionrequire the temperature of external surfaces of the medical device to not exceed specified limits to prevent discomfort to the user.
- IEC 60601-1 3 rd Editionrequires the temperature of touchable molded plastic surfaces of the medical device to be 60 degrees Celsius or below under certain ambient and use conditions.
- Some conventional approaches to meeting this requirementare to place a fan within the housing, or to place air vents in one or more outer walls of the housing to dissipate the heat generated by the infusion pump circuitry.
- a fanrequires additional power and air vents may allow fluid to enter the housing.
- a safe, efficient, and low cost system and method of dissipating heat in a medical deviceis needed.
- a medical devicein one embodiment, includes a housing, a power supply, a thermally conductive mounting clamp, a heat shield, and at least one fastener.
- the housingincludes a handle.
- the power supplyis disposed within the housing.
- the thermally conductive mounting clampis attached to an outer surface of the housing.
- the heat shieldis disposed within the housing adjacent to the power supply.
- the heat shieldis disposed against at least one interior surface of the handle.
- the at least one fastenerpasses through at least one opening in the housing and is in thermally conductive contact with the thermally conductive mounting clamp. Heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp.
- an infusion devicefor mounting to a pole.
- the infusion deviceincludes a housing, a thermally conductive mounting clamp, an infusion pump, a power supply, a heat shield, and at least one fastener.
- the housingincludes a handle.
- the thermally conductive mounting clampis attached to an outer surface of the housing and is configured to attach to a pole.
- the infusion pumpis disposed within the housing.
- the power supplyis disposed within the housing.
- the heat shieldis disposed within the housing adjacent to the power supply.
- the heat shieldis disposed against at least one interior surface of the handle.
- the at least one fastenerpasses through at least one opening in the housing and is in thermally conductive contact with the thermally conductive mounting clamp. Heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp.
- a methodis disclosed of dissipating heat in a medical device.
- Heatis dissipated from a power supply within a housing, through a heat shield disposed within the housing adjacent to the power supply and against at least one interior surface of a handle of the housing, through at least one fastener passing through at least one opening in the housing and in thermally conductive contact with a thermally conductive mounting clamp, and into the thermally conductive mounting clamp.
- FIG. 1illustrates a rear view of one embodiment of a medical device
- FIG. 2illustrates a perspective cross-section view through the medical device of the embodiment of FIG. 1 ;
- FIG. 3illustrates a partially disassembled view of the perspective cross-section view of FIG. 2 ;
- FIG. 4Aillustrates a temperature versus time graph plotting temperature versus time curves which were obtained for a medical device identical to the medical device of FIGS. 1-3 but lacking the heat shield and the thermally conductive bracket of the disclosure;
- FIG. 4Billustrates a temperature versus time graph plotting temperature versus time curves which were obtained for the medical device of FIGS. 1-3 having the heat shield and the thermally conductive bracket of the disclosure.
- FIG. 5illustrates a flowchart showing one embodiment of a method of dissipating heat in a medical device.
- FIG. 1illustrates a rear view of one embodiment of a medical device 10 .
- FIG. 2illustrates a perspective cross-section view through the medial device 10 of the embodiment of FIG. 1 .
- FIG. 3illustrates a partially disassembled view of the perspective cross-section view of FIG. 2 .
- the medical device 10comprises a housing 12 , a thermally conductive mounting clamp 14 , a power supply 16 , a heat shield 18 , an electrically insulating thermally conductive bracket 20 , fasteners 22 , and infusion pump 24 supported by the housing 12 .
- the medical device 10may comprise varying types of medical device unrelated to infusion pumps.
- the housing 12is made of Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS). In other embodiments, the housing 12 may be made of varying materials.
- the housing 12comprises a handle 26 external to the housing 12 .
- the handle 26may be gripped by a user to carry the medical device 10 .
- the handle 26is defined at least partially by a recess 26 a formed in an outer surface 12 a of the housing 12 adjacent to its top 12 b.
- the recess 26 ais elongated horizontally and is sized, shaped, and located to allow a typical user to insert one or more fingers into the recess 26 a to move or lift the medical device 10 .
- the thermally conductive mounting clamp 14is attached to the outer surface 12 a of the housing 12 .
- the thermally conductive mounting clamp 14allows the medical device 10 to be clamped to a structure 27 such as a pole.
- the thermally conductive mounting clamp 14is made of aluminum. In other embodiments, the thermally conductive mounting clamp 14 may be made of other thermally conductive materials.
- the power supply 16is disposed within the housing 12 . The power supply 16 supplies power to the infusion pump 24 .
- the heat shield 18is made of aluminum.
- the heat shield 18is disposed within the housing 12 adjacent but apart from the power supply 16 .
- a top portion 18 a of the heat shield 18comprises a curved, U-shape and is disposed against multiple interior surfaces 26 a, 26 b, 26 c, and 26 d of the handle 26 .
- a bottom portion 18 b of the heat shield 18is straight.
- the bottom portion 18 b of the heat shield 18is disposed below the handle 26 sandwiched against and between an interior surface 12 a of the housing 12 and the electrically insulating thermally conductive bracket 20 .
- the heat shield 18may comprise varying shapes, may be made of varying thermally conductive materials, and may be disposed against any number and configuration of interior surfaces of the handle 26 or housing 12 .
- the electrically insulating thermally conductive bracket 20is made of a ceramic filled nylon.
- the thermally conductive bracket 20comprises a plastic bracket material such as 299 X 131034 Nylon 6/6 supplied by RTP Company based out of Winona, Minn.
- the electrically insulating thermally conductive bracket 20may be made of varying electrically insulating but thermally conductive materials.
- the fasteners 22pass through openings 30 in the electrically insulating thermally conductive bracket 20 , through openings 32 in the housing 12 , into openings 34 in the thermally conductive mounting clamp 14 thereby securing the bottom portion 18 b of the heat shield 18 between the electrically insulating thermally conductive bracket 20 and the interior surface 12 a of the housing 12 .
- at least the openings 34 in the thermally conductive mounting clamp 14are threaded so as to matingly receive threaded fasteners 22 .
- the fasteners 22are in thermally conductive contact with the electrically insulating thermally conductive bracket 20 and with the mounting clamp 14 .
- the fasteners 22do not contact the heat shield 18 .
- the fasteners 22are made of steel.
- the fasteners 22may vary in number, may be made of varying thermally conductive materials, and may vary in configuration.
- Heat generated by the power supply 16is configured to dissipate from the power supply 16 to the heat shield 18 through at least one of convection or radiation, and from the heat shield 18 , through the electrically insulating thermally conductive bracket 20 , through the fasteners 22 , and into the thermally conductive mounting clamp 14 through conduction. In such manner, heat from the power supply 16 is dissipated using the configuration of the medical device 10 in order to cool the handle 26 to meet temperature requirements for the handle 26 of the housing 12 without requiring vents or a fan within the housing 12 .
- FIG. 4Aillustrates a temperature versus time graph 40 plotting temperature versus time curves 42 , 44 , and 46 which were obtained for a medical device identical to the medical device 10 of FIGS. 1-3 but lacking the heat shield 18 and the thermally conductive bracket 20 of the disclosure.
- Timeis plotted on the X-axis in minutes and temperature is plotted on the Y-axis in degrees Celsius.
- Curve 42represents the temperature versus time which was obtained, for the medical device identical to the medical device 10 of FIGS. 1-3 but lacking the heat shield 18 and the thermally conductive bracket 20 of the disclosure, at location 45 on the power supply 16 as shown in FIGS.
- Curve 44represents the temperature versus time which was obtained, for the medical device identical to the medical device 10 of FIGS. 1-3 but lacking the heat shield 18 and the thermally conductive bracket 20 of the disclosure, at location 47 on the outer surface 12 a of the housing 12 as shown in FIG.
- Curve 46represents the temperature versus time which was obtained, for the medical device identical to the medical device 10 of FIGS. 1-3 but lacking the heat shield 18 and the thermally conductive bracket 20 of the disclosure, at location 49 which is the ambient temperature in the laboratory where the medical device 10 was tested as shown in FIGS.
- location 49is shown on medical device 10 of the disclosure having the heat shield 18 and the thermally conductive bracket 20 , the location tested in creating curve 46 for the medical device lacking the heat shield and the thermally conductive bracket is identical to location 49 ).
- FIG. 4Billustrates a temperature versus time graph 47 plotting temperature versus time curves 48 , 51 , and 53 which were obtained for the medical device 10 of FIGS. 1-3 having the heat shield 18 and the thermally conductive bracket 20 of the disclosure.
- Timeis plotted on the X-axis in minutes and temperature is plotted on the Y-axis in degrees Celsius.
- Curve 48represents the temperature versus time which was obtained, for the medical device 10 of FIGS. 1-3 having the heat shield 18 and the thermally conductive bracket 20 of the disclosure, at location 45 on the power supply 16 as shown in FIGS. 2 and 3 .
- Curve 51represents the temperature versus time which was obtained, for the medical device 10 of FIGS.
- Curve 53represents the temperature versus time which was obtained, for the medical device 10 of FIGS. 1-3 having the heat shield 18 and the thermally conductive bracket 20 of the disclosure, at location 49 which is the ambient temperature in the laboratory where the medical device 10 was tested as shown in FIGS. 1 , 2 , and 3 .
- FIG. 5illustrates a flowchart showing one embodiment of a method 60 of dissipating heat in a medical device.
- the method 60may utilize any of the embodiments of the medical device disclosed herein.
- a power supply disposed within a housingmay power an infusion pump supported by the housing.
- heatis dissipated from the power supply within the housing, through a heat shield disposed within the housing adjacent to the power supply and against at least one interior surface of a handle of the housing, through at least one fastener passing through at least one opening in the housing and in thermally conductive contact with a thermally conductive mounting clamp, and into the thermally conductive mounting clamp.
- step 64may comprise the heat generated by the power supply being dissipated from the power supply to the heat shield through at least one of convection or radiation, and from the heat shield, through an electrically insulating thermally conductive bracket disposed against the heat shield within the housing, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
- the heat shieldmay be curved, may comprise a U-shape, and may be disposed against multiple interior surfaces of the handle of the housing.
- the configuration, shape, materials, and number of components of the medical devicemay vary.
- any of the steps of the method 60may be altered in substance or in order, may not be followed, or one or more additional steps may be added.
- One or more embodiments of the disclosuremay reduce one or more issues of one or more of the existing medical devices by dissipating heat generated by the medical device without requiring a fan or vents within the housing of the medical device. This may reduce the power required by the medical device along with reducing the likelihood that undesired fluid will enter the housing of the medical device.
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Abstract
Description
- The disclosure relates to a system and method for providing thermal management in medical devices.
- Medical devices, such as infusion pumps, typically generate substantial heat. Certain medical electrical equipment standards, such as IEC 60601-1 3rdEdition, require the temperature of external surfaces of the medical device to not exceed specified limits to prevent discomfort to the user. For example, IEC 60601-1 3rdEdition requires the temperature of touchable molded plastic surfaces of the medical device to be 60 degrees Celsius or below under certain ambient and use conditions. Some conventional approaches to meeting this requirement are to place a fan within the housing, or to place air vents in one or more outer walls of the housing to dissipate the heat generated by the infusion pump circuitry. However, a fan requires additional power and air vents may allow fluid to enter the housing.
- A safe, efficient, and low cost system and method of dissipating heat in a medical device is needed.
- In one embodiment of the disclosure, a medical device is disclosed. The medical device includes a housing, a power supply, a thermally conductive mounting clamp, a heat shield, and at least one fastener. The housing includes a handle. The power supply is disposed within the housing. The thermally conductive mounting clamp is attached to an outer surface of the housing. The heat shield is disposed within the housing adjacent to the power supply. The heat shield is disposed against at least one interior surface of the handle. The at least one fastener passes through at least one opening in the housing and is in thermally conductive contact with the thermally conductive mounting clamp. Heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp.
- In another embodiment of the disclosure, an infusion device for mounting to a pole is disclosed. The infusion device includes a housing, a thermally conductive mounting clamp, an infusion pump, a power supply, a heat shield, and at least one fastener. The housing includes a handle. The thermally conductive mounting clamp is attached to an outer surface of the housing and is configured to attach to a pole. The infusion pump is disposed within the housing. The power supply is disposed within the housing. The heat shield is disposed within the housing adjacent to the power supply. The heat shield is disposed against at least one interior surface of the handle. The at least one fastener passes through at least one opening in the housing and is in thermally conductive contact with the thermally conductive mounting clamp. Heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp.
- In still another embodiment of the disclosure, a method is disclosed of dissipating heat in a medical device. Heat is dissipated from a power supply within a housing, through a heat shield disposed within the housing adjacent to the power supply and against at least one interior surface of a handle of the housing, through at least one fastener passing through at least one opening in the housing and in thermally conductive contact with a thermally conductive mounting clamp, and into the thermally conductive mounting clamp.
- These and other features, aspects and advantages of the disclosure will become better understood with reference to the following drawings, description and claims.
FIG. 1 illustrates a rear view of one embodiment of a medical device;FIG. 2 illustrates a perspective cross-section view through the medical device of the embodiment ofFIG. 1 ;FIG. 3 illustrates a partially disassembled view of the perspective cross-section view ofFIG. 2 ;FIG. 4A illustrates a temperature versus time graph plotting temperature versus time curves which were obtained for a medical device identical to the medical device ofFIGS. 1-3 but lacking the heat shield and the thermally conductive bracket of the disclosure;FIG. 4B illustrates a temperature versus time graph plotting temperature versus time curves which were obtained for the medical device ofFIGS. 1-3 having the heat shield and the thermally conductive bracket of the disclosure; andFIG. 5 illustrates a flowchart showing one embodiment of a method of dissipating heat in a medical device.- The following detailed description is of the best currently contemplated modes of carrying out the disclosure. The description is not to be taken in a limiting sense, but is made merely for the purpose of illustrating the general principles of the disclosure, since the scope of the disclosure is best defined by the appended claims. It is noted that the Figures are purely for illustrative purposes and are not to scale.
FIG. 1 illustrates a rear view of one embodiment of amedical device 10.FIG. 2 illustrates a perspective cross-section view through themedial device 10 of the embodiment ofFIG. 1 .FIG. 3 illustrates a partially disassembled view of the perspective cross-section view ofFIG. 2 . Collectively, as shown inFIGS. 1-3 , themedical device 10 comprises ahousing 12, a thermallyconductive mounting clamp 14, apower supply 16, aheat shield 18, an electrically insulating thermallyconductive bracket 20,fasteners 22, andinfusion pump 24 supported by thehousing 12. In other embodiments, themedical device 10 may comprise varying types of medical device unrelated to infusion pumps.- The
housing 12 is made of Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS). In other embodiments, thehousing 12 may be made of varying materials. Thehousing 12 comprises ahandle 26 external to thehousing 12. Thehandle 26 may be gripped by a user to carry themedical device 10. In one embodiment thehandle 26 is defined at least partially by arecess 26aformed in anouter surface 12aof thehousing 12 adjacent to itstop 12b.Therecess 26ais elongated horizontally and is sized, shaped, and located to allow a typical user to insert one or more fingers into therecess 26ato move or lift themedical device 10. Since therecess 26ais adjacent to thetop 12bof thehousing 12, the user can also use their thumb on thetop 12bof thehousing 12 to improve their grip on themedical device 10. The thermallyconductive mounting clamp 14 is attached to theouter surface 12aof thehousing 12. The thermallyconductive mounting clamp 14 allows themedical device 10 to be clamped to astructure 27 such as a pole. The thermallyconductive mounting clamp 14 is made of aluminum. In other embodiments, the thermallyconductive mounting clamp 14 may be made of other thermally conductive materials. Thepower supply 16 is disposed within thehousing 12. Thepower supply 16 supplies power to theinfusion pump 24. - The
heat shield 18 is made of aluminum. Theheat shield 18 is disposed within thehousing 12 adjacent but apart from thepower supply 16. Atop portion 18aof theheat shield 18 comprises a curved, U-shape and is disposed against multipleinterior surfaces handle 26. Abottom portion 18bof theheat shield 18 is straight. Thebottom portion 18bof theheat shield 18 is disposed below thehandle 26 sandwiched against and between aninterior surface 12aof thehousing 12 and the electrically insulating thermallyconductive bracket 20. In other embodiments, theheat shield 18 may comprise varying shapes, may be made of varying thermally conductive materials, and may be disposed against any number and configuration of interior surfaces of thehandle 26 orhousing 12. The electrically insulating thermallyconductive bracket 20 is made of a ceramic filled nylon. Preferably the thermallyconductive bracket 20 comprises a plastic bracket material such as 299 X 131034 Nylon 6/6 supplied by RTP Company based out of Winona, Minn. In other embodiments, the electrically insulating thermallyconductive bracket 20 may be made of varying electrically insulating but thermally conductive materials. - The
fasteners 22 pass throughopenings 30 in the electrically insulating thermallyconductive bracket 20, throughopenings 32 in thehousing 12, intoopenings 34 in the thermally conductive mountingclamp 14 thereby securing thebottom portion 18bof theheat shield 18 between the electrically insulating thermallyconductive bracket 20 and theinterior surface 12aof thehousing 12. In one embodiment at least theopenings 34 in the thermally conductive mountingclamp 14 are threaded so as to matingly receive threadedfasteners 22. Thefasteners 22 are in thermally conductive contact with the electrically insulating thermallyconductive bracket 20 and with the mountingclamp 14. Thefasteners 22 do not contact theheat shield 18. Thefasteners 22 are made of steel. In other embodiments, thefasteners 22 may vary in number, may be made of varying thermally conductive materials, and may vary in configuration. Heat generated by thepower supply 16 is configured to dissipate from thepower supply 16 to theheat shield 18 through at least one of convection or radiation, and from theheat shield 18, through the electrically insulating thermallyconductive bracket 20, through thefasteners 22, and into the thermally conductive mountingclamp 14 through conduction. In such manner, heat from thepower supply 16 is dissipated using the configuration of themedical device 10 in order to cool thehandle 26 to meet temperature requirements for thehandle 26 of thehousing 12 without requiring vents or a fan within thehousing 12. FIG. 4A illustrates a temperature versustime graph 40 plotting temperature versus time curves42,44, and46 which were obtained for a medical device identical to themedical device 10 ofFIGS. 1-3 but lacking theheat shield 18 and the thermallyconductive bracket 20 of the disclosure. Time is plotted on the X-axis in minutes and temperature is plotted on the Y-axis in degrees Celsius.Curve 42 represents the temperature versus time which was obtained, for the medical device identical to themedical device 10 ofFIGS. 1-3 but lacking theheat shield 18 and the thermallyconductive bracket 20 of the disclosure, atlocation 45 on thepower supply 16 as shown inFIGS. 2 and 3 (althoughlocation 45 is shown onmedical device 10 of the disclosure having theheat shield 18 and the thermallyconductive bracket 20, the location tested in creatingcurve 42 for the medical device lacking the heat shield and the thermally conductive bracket is identical to location45).Curve 44 represents the temperature versus time which was obtained, for the medical device identical to themedical device 10 ofFIGS. 1-3 but lacking theheat shield 18 and the thermallyconductive bracket 20 of the disclosure, atlocation 47 on theouter surface 12aof thehousing 12 as shown inFIG. 1 , and more specifically was obtained on a rear verticalexterior surface 12cof therecess 26athat defines the handle26 (althoughlocation 47 is shown onmedical device 10 of the disclosure having theheat shield 18 and the thermallyconductive bracket 20, the location tested in creatingcurve 44 for the medical device lacking the heat shield and the thermally conductive bracket is identical to location47).Curve 46 represents the temperature versus time which was obtained, for the medical device identical to themedical device 10 ofFIGS. 1-3 but lacking theheat shield 18 and the thermallyconductive bracket 20 of the disclosure, atlocation 49 which is the ambient temperature in the laboratory where themedical device 10 was tested as shown inFIGS. 1 ,2, and3 (althoughlocation 49 is shown onmedical device 10 of the disclosure having theheat shield 18 and the thermallyconductive bracket 20, the location tested in creatingcurve 46 for the medical device lacking the heat shield and the thermally conductive bracket is identical to location49).FIG. 4B illustrates a temperature versustime graph 47 plotting temperature versus time curves48,51, and53 which were obtained for themedical device 10 ofFIGS. 1-3 having theheat shield 18 and the thermallyconductive bracket 20 of the disclosure. Time is plotted on the X-axis in minutes and temperature is plotted on the Y-axis in degrees Celsius.Curve 48 represents the temperature versus time which was obtained, for themedical device 10 ofFIGS. 1-3 having theheat shield 18 and the thermallyconductive bracket 20 of the disclosure, atlocation 45 on thepower supply 16 as shown inFIGS. 2 and 3 .Curve 51 represents the temperature versus time which was obtained, for themedical device 10 ofFIGS. 1-3 having theheat shield 18 and the thermallyconductive bracket 20 of the disclosure, atlocation 47 on theouter surface 12aof thehousing 12 as shown inFIG. 1 , and more specifically obtained on a rear verticalexterior surface 12cof therecess 26athat defines thehandle 26. A comparison ofcurve 44 ofFIG. 4A tocurve 51 ofFIG. 4B demonstrates that theheat shield 18 and the thermallyconductive bracket 20 of themedical device 10 ofFIGS. 1-3 helped reduce the temperature obtained atlocation 47 on theouter surface 12aof thehousing 12, and more specifically obtained on the rear verticalexterior surface 12cof therecess 26athat defines thehandle 26 as shown inFIG. 1 , to a level that meets the requirements of the IEC 60601-1 3rdEdition standard which requires the temperature of external surfaces of thehousing 12 of themedical device 10 to be 60 degrees Celsius or below under certain ambient conditions.Curve 53 represents the temperature versus time which was obtained, for themedical device 10 ofFIGS. 1-3 having theheat shield 18 and the thermallyconductive bracket 20 of the disclosure, atlocation 49 which is the ambient temperature in the laboratory where themedical device 10 was tested as shown inFIGS. 1 ,2, and3.- Thus, it can be seen and appreciated by one of ordinary skill in the art that temperature versus time testing of an embodiment of a medical device lacking components of the present disclosure resulted in a temperature versus time curve at
location 47 on theouter surface 12aof thehousing 12 in or near thehandle 26 which came close to not meeting the requirements of the IEC 60601-1 3rdEdition standard in an environment with an ambient temperature of approximately 25 degrees Celsius. One skilled in the art will appreciate that if the environment has an ambient temperature of 40 degrees Celsius and the medical device lacks the components of the present disclosure, the surface temperature may exceed the standard. Based on this testing, it is apparent that the use of theheat shield 18 and the thermallyconductive bracket 20 allows themedical device 10 ofFIGS. 1-3 to reduce its temperature to easily meet the IEC 60601-1 3rdEdition standard without the use of vents or a fan to lower the temperature. This reduces the power required by themedical device 10 along with reducing the likelihood that undesired fluid will enter thehousing 12 of themedical device 10. FIG. 5 illustrates a flowchart showing one embodiment of amethod 60 of dissipating heat in a medical device. Themethod 60 may utilize any of the embodiments of the medical device disclosed herein. Instep 62, a power supply disposed within a housing may power an infusion pump supported by the housing. Instep 64, heat is dissipated from the power supply within the housing, through a heat shield disposed within the housing adjacent to the power supply and against at least one interior surface of a handle of the housing, through at least one fastener passing through at least one opening in the housing and in thermally conductive contact with a thermally conductive mounting clamp, and into the thermally conductive mounting clamp.- In one embodiment, step64 may comprise the heat generated by the power supply being dissipated from the power supply to the heat shield through at least one of convection or radiation, and from the heat shield, through an electrically insulating thermally conductive bracket disposed against the heat shield within the housing, through the at least one fastener, and into the thermally conductive mounting clamp through conduction. The heat shield may be curved, may comprise a U-shape, and may be disposed against multiple interior surfaces of the handle of the housing. In other embodiments, the configuration, shape, materials, and number of components of the medical device may vary. In still other embodiments, any of the steps of the
method 60 may be altered in substance or in order, may not be followed, or one or more additional steps may be added. - One or more embodiments of the disclosure may reduce one or more issues of one or more of the existing medical devices by dissipating heat generated by the medical device without requiring a fan or vents within the housing of the medical device. This may reduce the power required by the medical device along with reducing the likelihood that undesired fluid will enter the housing of the medical device.
- It should be understood, of course, that the foregoing relates to exemplary embodiments of the disclosure and that modifications may be made without departing from the scope of the disclosure as set forth in the following claims.
Claims (20)
1. A medical device comprising:
a housing comprising a handle;
a power supply disposed within the housing;
a thermally conductive mounting clamp attached to an outer surface of the housing;
a heat shield disposed within the housing adjacent to the power supply, the heat shield disposed against at least one interior surface of the handle; and
at least one fastener passing through at least one opening in the housing and in thermally conductive contact with the thermally conductive mounting clamp, wherein heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp.
2. The medical device ofclaim 1 further comprising an infusion pump supported by the housing.
3. The medical device ofclaim 1 wherein the heat shield is disposed apart from the power supply within the housing, and the heat generated by the power supply is configured to dissipate from the power supply to the heat shield through at least one of convection or radiation and from the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
4. The medical device ofclaim 1 wherein the heat shield is curved.
5. The medical device ofclaim 1 wherein the heat shield comprises a U-shape.
6. The medical device ofclaim 1 wherein the heat shield is disposed against multiple interior surfaces of the handle.
7. The medical device ofclaim 1 further comprising an electrically insulating, thermally conductive bracket disposed against the heat shield within the housing, wherein heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the electrically insulating, thermally conductive bracket, through the at least one fastener, and into the thermally conductive mounting clamp.
8. The medical device ofclaim 7 wherein the heat generated by the power supply is configured to dissipate from the power supply to the heat shield through at least one of convection or radiation and from the heat shield, through the electrically insulating, thermally conductive bracket, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
9. An infusion device for mounting to a pole comprising:
a housing comprising a handle;
a thermally conductive mounting clamp attached to an outer surface of the housing and configured to attach to a pole;
an infusion pump disposed within the housing;
a power supply disposed within the housing;
a heat shield disposed within the housing adjacent to the power supply, the heat shield disposed against at least one interior surface of the handle; and
at least one fastener passing through at least one opening in the housing and in thermally conductive contact with the thermally conductive mounting clamp, wherein heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp.
10. The infusion device ofclaim 9 wherein the heat shield is disposed apart from the power supply within the housing, and the heat generated by the power supply is configured to dissipate from the power supply to the heat shield through at least one of convection or radiation and from the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
11. The infusion device ofclaim 9 wherein the heat shield is curved.
12. The infusion device ofclaim 9 wherein the heat shield comprises a U-shape.
13. The infusion device ofclaim 9 further comprising an electrically insulating, thermally conductive bracket disposed against the heat shield within the housing, wherein heat generated by the power supply is configured to dissipate from the power supply, through the heat shield, through the electrically insulating, thermally conductive bracket, through the at least one fastener, and into the thermally conductive mounting clamp.
14. The infusion device ofclaim 13 wherein the heat generated by the power supply is configured to dissipate from the power supply to the heat shield through at least one of convection or radiation and from the heat shield, through the electrically insulating, thermally conductive bracket, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
15. A method of dissipating heat in a medical device comprising:
dissipating heat from a power supply within a housing, through a heat shield disposed within the housing adjacent to the power supply and against at least one interior surface of a handle of the housing, through at least one fastener passing through at least one opening in the housing and in thermally conductive contact with a thermally conductive mounting clamp, and into the thermally conductive mounting clamp.
16. The method ofclaim 15 further comprising the power supply powering an infusion pump supported by the housing.
17. The method ofclaim 15 further comprising the heat generated by the power supply dissipating from the power supply to the heat shield through at least one of convection or radiation and from the heat shield, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
18. The method ofclaim 15 wherein the heat shield is disposed against multiple interior surfaces of the handle.
19. The method ofclaim 15 further comprising the heat generated by the power supply dissipating from the power supply, through the heat shield, through an electrically insulating, thermally conductive bracket disposed against the heat shield within the housing, through the at least one fastener, and into the thermally conductive mounting clamp.
20. The method ofclaim 19 further comprising the heat generated by the power supply dissipating from the power supply to the heat shield through at least one of convection or radiation and from the heat shield, through the electrically insulating, thermally conductive bracket, through the at least one fastener, and into the thermally conductive mounting clamp through conduction.
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| US16/048,106US11213619B2 (en) | 2013-11-11 | 2018-07-27 | Thermal management system and method for medical devices |
| US17/645,543US12076525B2 (en) | 2013-11-11 | 2021-12-22 | Thermal management system and method for medical devices |
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| US17/645,543ActiveUS12076525B2 (en) | 2013-11-11 | 2021-12-22 | Thermal management system and method for medical devices |
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| US16/048,106Active2036-08-06US11213619B2 (en) | 2013-11-11 | 2018-07-27 | Thermal management system and method for medical devices |
| US17/645,543ActiveUS12076525B2 (en) | 2013-11-11 | 2021-12-22 | Thermal management system and method for medical devices |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20190192763A1 (en) | 2019-06-27 |
| US10034975B2 (en) | 2018-07-31 |
| US12076525B2 (en) | 2024-09-03 |
| US20170340809A1 (en) | 2017-11-30 |
| US11213619B2 (en) | 2022-01-04 |
| US20220362457A1 (en) | 2022-11-17 |
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| AS | Assignment | Owner name:HOSPIRA, INC., ILLINOIS Free format text:ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MCLENNAN, KEVIN P., MR.;HOENNINGER, JOHN C., III, MR.;REEL/FRAME:034152/0220 Effective date:20141007 | |
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| STCB | Information on status: application discontinuation | Free format text:ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |