JP2015196001A - Low-temperature therapy pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-temperature therapy pad adhered to the body surface, and making a load on the skin small.SOLUTION: A low-temperature therapy pad includes a sheet-like pad body to be mounted on the body surface of a human body, and adjusts the body temperature of the human body to a desired temperature through heat exchange by circulating inside the pad body a circulation flowing body adjusted to a prescribed temperature. The pad body includes: a rear surface layer having on one surface a plurality of salients forming a circulation flow channel of the circulation flowing body; a closing layer laminated on one surface of the rear surface layer, and bonded to the upper surface of each of the salients, and closing the upper part of an interval between the salients so as to form the circulation flow channel; a heat diffusion layer provided on the closing layer; and a front surface layer covering the surface of the heat diffusion layer and contacting the body surface of the human body.

Description

  The present invention relates to a cryotherapy pad that is used for cryotherapy and cools or reheats the body surface of a patient.

  In recent years, cryotherapy has been performed in which patients are kept at a low body temperature in the acute phase after surgery or after injury. Cryogenic therapy is expected to suppress brain nerve cell death and prevent progression of brain edema by suppressing oxygen consumption and lowering brain metabolism. In this cryotherapy, attention is paid to the effectiveness especially for neonatal asphyxia.

  Cooling methods in cryotherapy include invasive methods such as injecting cooling water or infusion into blood vessels (intravascular cooling, intravenous cooling), and injecting cooling water using a gastric tube (gastric cooling). There are minimally invasive methods, non-invasive methods such as cooling the body surface and cranium with ice packs, cooling pads, cooling helmets etc. (body surface cooling, cranium cooling), all of which concentrate rapidly on specific organs It is desirable that local cooling or the like is possible.

  For example, in Patent Document 1, a predetermined region on the body surface is covered with a soft membrane, a fluid circulation space is formed between the soft membrane and the body surface, and the heat exchange fluid is circulated at a negative pressure locally. Devices for cooling the body have been proposed. In this apparatus, since the heat exchange fluid is circulated in direct contact with the body surface, efficient heat exchange is possible even in a portion having body hair.

  Patent Document 2 discloses a hot / cold treatment device that circulates a circulating fluid (hot water or cold water) inside a pad that contacts the body surface. In this apparatus, the circulation path in the supply / discharge tube and the pad is shared by hot water and cold water in order to simplify the structure and the manufacturing process. Further, the efficiency of treatment is improved by spreading the circulating fluid over the entire pad.

  Patent Document 3 proposes that hot water and cold water are prepared as a medium and the temperature of the cooling body is quickly adjusted by mixing them at an appropriate ratio. Further, it is described that a sterilization treatment unit is provided in a refrigerant tank or a heating medium tank, and the medium is sterilized by ultraviolet irradiation, addition of a sterilizing agent, filter filtration, and the like.

Japanese Patent No. 4808366 JP 11-197174 A JP 2011-200386 A

  In such cryotherapy, the temperature of the pad can be adjusted by circulating a circulating fluid such as water adjusted to a desired temperature through a flow path formed inside the pad. In this case, in order to quickly cool the patient to a desired body temperature, the temperature distribution on the surface of the pad to be brought into contact with the body surface is made uniform, and it is closely attached to the body surface without waste, and particularly a newborn with a thin epidermis, etc. It is required that the burden on the skin is small considering the above.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cryotherapy pad that can be brought into close contact with the body surface and has a low burden on the skin.

  The present invention includes a sheet-like pad body that is attached to the surface of a human body, circulates a circulating fluid adjusted to a predetermined temperature inside the pad body, and changes the body temperature of the human body to a desired temperature by heat exchange. A pad for low-temperature therapy to be adjusted, wherein the pad main body is laminated on the one surface of the back surface layer having a plurality of convex portions forming the circulation flow path of the circulating fluid on one surface. A closed layer that is adhered to the upper surface of each convex portion and closes the upper portion between the convex portions to form the flow channel, a thermal diffusion layer provided on the closed layer, and the thermal diffusion layer And a surface layer in contact with the body surface of the human body.

  According to this low temperature therapy pad, the temperature distribution of the pad body is made uniform by the thermal diffusion layer, and the burden on the skin can be suppressed by the surface layer, so that rapid body temperature adjustment can be performed without damaging the skin of the newborn. .

  In this cryotherapy pad, the back layer is preferably made of foamed polyethylene. Since the foamed polyethylene is flexible and has heat insulation properties, heat transfer of the circulating fluid on the back surface of the pad main body can be prevented, and heat exchange between the circulating fluid and the body surface can be performed more efficiently.

  In this cryotherapy pad, it is preferable that the closing layer is made of ethylene vinyl acetate resin and is heat-sealed to the upper surface of the convex portion of the back surface layer. Since the ethylene vinyl acetate resin is flexible and high in strength, the circulating fluid can be reliably held between the back layer and the heat exchange between the circulating fluid and the body surface can be performed more efficiently.

  In this cryotherapy pad, the thermal diffusion layer is preferably made of hydrogel. Hydrogel has high thermal conductivity and is flexible and sticky, so it adheres closely to the closure layer and performs heat exchange with the circulating fluid and with the body surface through the surface layer with high efficiency. Can do.

  In this cryotherapy pad, the surface layer is preferably made of urethane. It is flexible, stretchable and hypoallergenic, and by forming a surface layer with urethane, which is also used for medical tape, etc., and covering the heat diffusion layer, it is effective that the heat diffusion layer sticks directly to the skin The body temperature can be adjusted without damaging the skin even when targeting newborns.

  According to the low-temperature treatment pad of the present invention, it is possible to provide a low-temperature treatment pad that can be brought into close contact with the body surface and has a small burden on the skin.

It is a perspective view which shows the apparatus for cryotherapy provided with the pad for cryotherapy of this invention. It is a perspective view which shows the pad for cryotherapy (circulation pad) provided with the pad main body for hanging. It is a perspective view which shows the circulation pad provided with the pad main body for heads. It is a top view which shows a circulation pad. It is sectional drawing which shows the structure of a pad main body. It is a perspective view which shows a part of back surface layer of a pad main body. It is sectional drawing which follows the AA line of FIG. 4 which shows the pad connector part of a circulation pad. It is a plane arrow line view which follows the BB line of FIG. 7 which shows the pad connector part of a circulation pad. It is a plane arrow line view which follows the CC line of FIG. 7 which shows the pad connector part of a circulation pad.

  Hereinafter, embodiments of a cryotherapy pad according to the present invention will be described with reference to the drawings. FIG. 1 shows a cryotherapy apparatus 10 used for cryotherapy. The cryotherapy device 10 includes a device main body 20 that supplies and recovers the circulating fluid W while adjusting the circulating fluid W to a desired temperature, a relay hose portion 30 that is connected to the device main body 20 and distributes the circulating fluid W, and a relay hose portion. 30 is provided with a cryotherapy pad (hereinafter referred to as a circulation pad) 40 through which the circulating fluid W supplied and recovered by the apparatus main body 20 circulates. In the present embodiment, water is used as the circulating fluid W.

  The apparatus body 20 includes a tank (not shown) that holds the circulating fluid W, a temperature adjustment unit (not shown) that adjusts the temperature of the circulating fluid W, a circulation unit (not shown) that supplies and recovers the circulating fluid W, A control unit (not shown) for controlling the unit is built in, and the monitoring sensor (not shown) monitors the temperature of the circulating fluid W, the body temperature of the patient, the surface temperature of the circulation pad 40, etc. Thus, the circulating fluid W can be cooled or heated to adjust to an appropriate temperature, and the circulating fluid W can be circulated between the circulation pad 40 and the apparatus main body 20 through the relay hose portion 30.

  The relay hose part 30 has a configuration in which a supply pipe 31 and a recovery pipe 32 that connect between the apparatus main body 20 and the circulation pad 40 are combined into one, and connector 33 parts are provided at both ends thereof.

  The cryotherapy apparatus 10 includes a plurality of pads shaped according to the cooling site of the patient, that is, a pad for the whole body that is laid under the patient's body and cools the patient's whole body from below. Circulating pad 40 having pad body 50, circulating pad 40A having pad body 50A as a hanging pad for whole body that is hung on the patient's body and cools the whole body of the patient from above, wound around the patient's head A circulation pad 40B having a head body 50B for cooling the patient's head is provided (see FIGS. 1 to 3). By selecting any one or more of the circulation pads 40, 40A, 40B and connecting them to the apparatus main body 20 via the relay hose portion 30, each part of the patient's body surface is efficiently cooled as necessary. be able to.

  As shown in FIGS. 1 and 4, the circulation pad 40 includes a sheet-like pad main body 50 and a pad connector portion 60 fixed to the end of the pad main body 50. Each of the hanging circulation pad 40A and the head circulation pad 40B is provided with the same pad connector portion 60 as that of the circulation pad 40. The structures of the circulation pad 40A and the circulation pad 40B are the same as those of the circulation pad 40 except that the shapes of the pad bodies 50A and 50B are different from the pad body 50.

  FIG. 4 shows the back surface of the pad main body 50 in a state where the pad connector portion 60 is not attached. Hereinafter, in the pad main body 50, the side that does not touch the patient's body surface is referred to as “back surface”, and the side that touches the patient's body surface is referred to as “surface”.

  The pad main body 50 will be described with reference to FIGS. The pad main body 50 includes a back surface layer 501 having a plurality of convex portions 501 a, 501 b, and 501 c forming the circulation channel 51 of the circulating fluid W on one surface (the front surface side of the pad main body 50), and one of the back surface layers 501. A closed layer 502 that is laminated on the upper surface (surface side) and adhered to the upper surface of each convex portion 501a to close the upper portion between the convex portions 501a to form the flow channel 51, and provided on the closed layer 502 And a surface layer 504 that covers the surface of the thermal diffusion layer 503 and contacts the body surface of the human body.

  The back surface layer 501 is formed of, for example, foamed polyethylene having water shielding properties and low heat transfer properties. As shown in FIGS. 4 to 6, the back surface layer 501 has a substantially belt-like convex portion 501 a, a substantially cylindrical convex portion 501 b, and an outer peripheral edge. A circumferential convex portion 501c is provided on one surface. More specifically, a large number of substantially cylindrical convex portions 501b are provided on the entire surface in the inner portion in the plane direction surrounded by the convex portions 501c, and a substantially strip-shaped convex portion 501a is provided in the central portion. Yes. Thereby, between the convex parts 501a, 501b, and 501c, the flow path 51 which has a channel area according to the height of the convex parts 501a, 501b, and 501c and extends in the surface direction is formed.

  The closing layer 502 adhered to the front surface side of the back surface layer 501 is made of, for example, ethylene vinyl acetate resin (EVA resin) having water shielding properties, and is adhered to the upper surfaces of the convex portions 501a, 501b, and 501c by heat fusion. Has been. A flow passage 51 is formed between the back layer 501 and the closing layer 502.

  The thermal diffusion layer 503 provided on the surface side of the closing layer 502 is formed of, for example, hydrogel, which is excellent in thermal diffusibility and is soft and easily along the skin. Hydrogel has hydrophilicity and is easy to adhere to human skin, so it is advantageous for heat exchange between circulating fluid W and body surface. There is a risk of damaging the skin.

  For this reason, in the pad main body 50, the surface layer 504 covers the surface side of the thermal diffusion layer 503. The surface layer 504 is made of a material that does not have excessive adhesiveness and is flexible and excellent in heat transfer, and has a low burden on the skin, such as a thin and flexible sheet-like urethane resin, vinyl chloride, polyethylene (in this embodiment, a urethane resin). The entire surface is bonded to the thermal diffusion layer 503 due to the adhesiveness of the thermal diffusion layer 503. As a result, the surface layer 504 covers the surface side of the heat diffusion layer 503 to form the outermost surface of the pad main body 50, and the adhesiveness of the heat diffusion layer 503 can be suppressed, so that the infant's skin is not damaged. Thus, reliable heat exchange between the circulating fluid W and the body surface becomes possible.

  As shown in FIG. 4, the flow passage 51 formed in the pad main body 50 extends from the two inflow ports 52 by dividing the inside surrounded by the convex portion 501 c by the strip-shaped convex portion 501 a. Two inflow passages (upstream portion) 53 and one outflow passage (downstream portion) 55 that joins these upstream portions 53 and extends to one outflow port 54 are formed to be continuous. By providing a substantially columnar convex portion 501a on the entire flow path 51, the distance between the back surface layer 501 and the closing layer 502 is maintained at a predetermined size.

  In this flow channel 51, the downstream part 55 is disposed between the two upstream parts 53, and the flow direction is reverse in the part where the upstream part 53 and the downstream part 55 are arranged via the convex part 501a. ing. The two inflow ports 52 and the outflow ports 54 that are the entrances and exits of the circulating fluid W with respect to the circulation channel 51 are adjacent to each other and open at the end of the back surface of the pad main body 50. A pad connector portion 60 connected to the inflow port 52 and the outflow port 54 is attached to the back surface of the pad main body 50.

  Similar to the circulation pad 40, the circulation flow path 51A of the circulation pad 40A shown in FIG. 2 is also joined by two inflow paths 53A extending from the two inflow ports and the inflow paths 53A. One outflow channel 55A extending to two outflow ports is continuous, and the outflow channel 55A is disposed between the two inflow channels 53A. In addition, the circulation channel 51B of the circulation pad 40B shown in FIG. 3 also has two inflow channels 53B extending from the two inflow ports, and one inflow channel 53B that merges these inflow channels 53B and extends to one outflow port. The outflow channel 55B is continuous, and the outflow channel 55B is arranged between the two inflow channels 53B.

  The pad connector part 60 is shown in FIGS. 7 is a cross-sectional view taken along line AA in FIG. 4, FIG. 8 is a view taken along line BB in FIG. 7, and FIG. 9 is a view taken along line CC in FIG. .

  The pad connector part 60 is connected to the supply connection pipe 71 to which the supply pipe 31 of the relay hose part 30 is connected, the recovery connection pipe 72 to which the recovery pipe 32 of the relay hose part 30 is connected, and the connector part 33 of the relay hose part 30. Connected to a connection hose part 70 (see FIG. 4) having a relay hose connection part 73 to be connected, a supply port 81 to which a supply connection pipe 71 of the connection hose part 70 is connected, and each inlet 52 of the pad main body 50. Each supply port 82, a supply portion 80 having a supply pipe branching portion 83 formed between each supply port 82 and the supply port 81 and communicating with the two inflow ports 52, and a recovery connection pipe 72 of the connection hose portion 30 are provided. A recovery port 91 connected, a recovery port 92 connected to the outlet 54 of the pad main body 50, and a recovery unit 90 having a pipe portion 93 formed between the recovery port 92 and the recovery port 91 are provided. To have.

  The supply unit 80 can cause the circulating fluid W supplied through the supply port 81 to flow into the two inflow ports 52 by providing the two supply ports 82 in the supply pipe branching unit 83. Each supply port 82 is formed with a boss 84 (FIG. 8) provided in the flow path and a basket-like protrusion 85 (FIG. 9) provided so as to cover the flow path. And the projecting portion 85 constitute a bactericidal agent holding portion 86 for circulating the circulating fluid W and holding the bactericidal agent T. The antibacterial agent T is, for example, substantially spherical iodine, and can suppress the growth of bacteria in the circulating fluid W by touching the circulating fluid W. The protrusion 85 enters the inflow port 52 of the pad main body 50 and secures the inflow channel 53 of the pad main body 50 in the thickness direction.

  Similarly, a boss 94 (FIG. 8) provided in the flow path and a basket-like protrusion 95 (FIG. 9) provided so as to cover the flow path are formed in the recovery port 92 of the recovery section 90. These bosses 94 and protrusions 95 constitute a bacteriostatic agent holding portion 96 for circulating the circulating fluid W and holding the bactericidal agent T. The protrusion 95 enters the outflow port 54 of the pad main body 50 and is fixed so as to secure the outflow channel 55 of the pad main body 50 in the thickness direction.

  In the cryotherapy apparatus 10 having such a configuration, the temperature of the circulating fluid W is adjusted in the apparatus body 20 and supplied to the circulation pad 40 through the relay hose portion 30. In the circulation pad 40, the circulating fluid W flows from the relay hose part 30 through the pad connector part 60 into two upstream parts (inflow passages) 53 from two inlets 52 provided on the back surface of the pad main body 50. After flowing through the flow path 51 and merging with one downstream part (outflow flow path) 55, it is recovered from the single outlet 54 to the apparatus body 20 through the pad connector part 60 and the relay hose part 30, and the temperature is adjusted again. And supplied to the circulation pad 40. In addition, propagation of bacteria in the circulating fluid W is suppressed by passing through the antibacterial agent holding parts 86 and 96 of the pad connector part 60.

  According to the circulation pad (cold therapy pad) 40 of the cryotherapy device 10, since two inflow passages 53 are provided, the piping resistance at the inlet 52 is reduced, the device body 20 is downsized, and the like. Is possible. Further, since the two inflow channels 53 are provided, the length of the channel from the inflow port 52 to the outflow port 54 is shortened, and the temperature distribution on the surface of the pad main body 50 becomes uniform.

  For circulation of the circulating fluid W, it is preferable to use a suction pump that sucks from the circulation pad 40 instead of a pressure feed pump pushed out from the apparatus main body 20. Since the pad main body 50 is not expanded by using the suction pump, it is possible to suppress damage such as deformation of the pad main body 50 and disconnection of the back surface layer 501 and the closing layer 502. Further, even if the pad main body 50 is damaged, the leakage of the circulating fluid W can be suppressed to a small level.

  In addition, since the circulation channel 51 of the circulation pad 40 is provided with the outflow channel 55 between the two inflow channels 53, heat exchange is performed between the inflow channel 53 and the outflow channel 55. The temperature distribution on the surface of the pad main body 50 becomes more uniform.

  Further, the circulation pad 40 is provided with two inlets 52 and outlets 54 adjacent to each other, and is connected to a supply pipe branching portion 83 communicating with the two inlets 52 and the supply pipe branching portion 83. By providing the pad connector portion 60 formed with one supply port 81 and a recovery port 91 communicating with the outflow port 54, a connection port for circulating the circulating fluid W in the pad main body 50 is provided in the pad connector portion 60. Therefore, the supply pipe 31 for supplying the circulating fluid W from the apparatus main body 20 to the pad main body 50 and the recovery pipe 32 for returning the circulating fluid W recovered from the pad main body 50 to the apparatus main body 20 are combined. Can be managed in one piece.

  In addition, a connector-integrated relay hose portion 30 including a connector portion 33 provided with a supply port of the supply tube 31 and a recovery port of the recovery tube 32 corresponding to the pad connector portion 60 of the pad main body 50 is provided. By being used, the supply pipe and the collection pipe are bundled so that the handling is further facilitated, and the attachment and detachment of the connector part 33 and the pad connector part 60 can facilitate the attachment and detachment of each pipe and ensure the erroneous connection. Can be prevented.

  Further, in the circulation pad 40, antibacterial agent holding portions 86 and 96 that circulate the circulating fluid W and hold the antibacterial agent T are provided in the inflow port 52 and the outflow port 54 in the pad connector unit 60. Therefore, whenever the pad main body 50 is replaced, the antibacterial agent T can be newly supplied into the circulating fluid W, and the maintenance of the antibacterial agent holding portions 86 and 96 is unnecessary.

  In the circulation pad 40 in which the circulating fluid W circulates in this way, the surface layer 504 covers the surface of the heat diffusion layer 503 of the pad body 50, so that the temperature distribution of the pad body 50 by the heat diffusion layer 503. And the heat exchange between the circulating fluid W and the body surface is possible, and the surface layer 504 can prevent the heat diffusion layer 503 from sticking to the body surface, thereby reducing the burden on the skin. Therefore, cryotherapy can be applied to newborns and the like without damaging the skin by wearing the circulation pad 40.

  As described above, according to the low-temperature treatment pad of the present invention, the temperature distribution can be made uniform and the patient's body temperature can be adjusted effectively, and the burden on the skin is small. Can be applied.

  In addition, this invention is not limited to the thing of the structure of the said embodiment, In a detailed structure, it is possible to add a various change in the range which does not deviate from the meaning of this invention.

  In the cryotherapy pad, it is possible to provide a cryotherapy pad that can be brought into close contact with the body surface and has a low burden on the skin.

DESCRIPTION OF SYMBOLS 10 Cryogenic therapy apparatus 20 Apparatus main body 30 Relay hose part 31 Supply pipe 32 Recovery pipe 33 Connector part 40, 40A, 40B Cryogenic therapy pad (circulation pad)
50, 50A, 50B Pad body 501 Back surface layer 501a, 501b, 501c Convex portion 502 Closure layer 503 Thermal diffusion layer 504 Surface layer 51 Flow channel 52 Inlet port 53 Upstream portion (inflow channel)
54 Outflow port 55 Downstream part (outflow channel)
60 Pad connector part 70 Connection hose part 71 Supply connection pipe 72 Recovery connection pipe 73 Relay hose connection part 80 Supply part 81 Supply port 82 Supply port 83 Supply pipe branch part 84 Boss 85 Projection part 86 Antibacterial agent holding part 90 Recovery part 91 Recovery port 92 Recovery port 93 Pipe portion 94 Boss 95 Projection portion 96 Antibacterial agent holding portion T Antibacterial agent W Circulating fluid (water)

Claims (5)

A cryotherapy comprising a sheet-like pad body mounted on the body surface of the human body, circulating a circulating fluid adjusted to a predetermined temperature inside the pad body, and adjusting the body temperature of the human body to a desired temperature by heat exchange Pad for
The pad body is
A back layer having a plurality of convex portions on one surface forming the circulation flow path of the circulating fluid;
A closed layer that is laminated on the one surface of the back surface layer, is attached to the upper surface of each convex portion, and closes the upper portion between the convex portions to form the flow channel;
A thermal diffusion layer provided on the closure layer;
A cryotherapy pad comprising a surface layer that covers a surface of the thermal diffusion layer and contacts a body surface of a human body.   The cryotherapy pad according to claim 1, wherein the back layer is made of foamed polyethylene.   3. The cryotherapy pad according to claim 1, wherein the closing layer is made of an ethylene vinyl acetate resin and is heat-sealed to the upper surface of the convex portion of the back surface layer.   The said thermal diffusion layer consists of hydrogels, The pad for low-temperature therapy in any one of Claim 1 to 3 characterized by the above-mentioned.   The cryotherapy pad according to any one of claims 1 to 4, wherein the surface layer is made of urethane.

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