JP6892652B2 - Medical position fixing mat - Google Patents

Description

The present invention relates to a human medical posture fixing mat used for radiotherapy and the like.

Advanced medical institutions such as university medical schools and general hospitals continue to introduce expensive and advanced medical devices such as CT scans, MRI scans, and radiotherapy devices such as heavy ion beams. If each medical institution operates such medical equipment efficiently, it will greatly contribute to the reduction of medical costs. However, the actual working time of these medical devices is short, and there are few measures to be taken within a predetermined time. The biggest causes are that it takes a lot of time to prepare for the patient's posture and that the examination / irradiation is interrupted / failed due to the patient's posture movement while the device is in operation. Further, in general medical institutions, the number of operations such as da Vinci surgery in which a patient is fixed is increasing in recent years, and in this case as well, a medical position fixing mat (pad) for fixing the patient is important. Such a medical position fixing mat is gentle to the patient, such as (1) the time required for the patient's position fixing preparation is short, and the patient's position fixing during the examination is easy, and (2) is durable. It is required that it can be used repeatedly, and (3) it is easy for medical staff to operate.

As a medical position fixing pad, it is a magnetic field distortion removing tool used in an MRI apparatus that applies a high-frequency pulse from an RF coil toward a subject and reconstructs a collected NMR signal to obtain a magnetic resonance image. A magnetic field strain removing cushion for an MRI apparatus, which is a cushion body containing a water-soluble solution in which an iron or cobalt-based material is dissolved and a granular material made of a predetermined foamed resin, has been proposed (Patented). Reference 1). However, since the foam resin granules are enclosed in one bag body of this medical position fixing pad, when the patient's weight is applied to the bag body, the granules inside the bag body are inside the bag body. It moves in the direction in which the body weight is not loaded, and the granules are biased. For this reason, the required amount of granules does not exist in the place that supports the part that bears the most weight, and the "feeling of bottoming out" and "hardness" are easily transmitted to the patient's body. In addition, there is a problem that it takes a long time to prepare for fixing the patient's body position by correcting these "feeling of bottoming out" and "hardness".

As a technique for dealing with such a problem, in Patent Document 2, a position-fixing pad having a cushion body built inside a gas-impermeable bag body, and the cushion body is made of a woven fabric or a knitted fabric. It is a gas permeable bag made of, and this bag is a quilted bag in which two fabrics constituting the two main planes of the bag are connected by a connecting portion such that a plurality of fabrics are present in an island shape. A position-fixing pad, which is a body and in which foamed beads are filled inside the bag, has been proposed (see Patent Document 2).

Japanese Patent No. 5212026 Japanese Unexamined Patent Publication No. 2016-67665

The position fixing pad of Patent Document 2 requires a short time to prepare for the patient's position, is easy to fix the patient's position during the examination, is durable and can be used repeatedly, and is easy for the medical staff to operate. It is said to be useful as a position-fixing pad that can prevent pressure ulcers and the like, and does not convey the "feeling of bottoming out" or "hardness" to the patient.

However, depending on the condition of the patient and the composition of the mat, in applications where the entire body is fixed and the treatment is performed for a long time, such as when using it as a posture fixing mat for radiation / heavy particle beam irradiation or as a posture fixing mat for pressure ulcer treatment. It is not easy to completely prevent pressure ulcers. Therefore, while maintaining the effect of the conventional posture fixing pad shown in Patent Document 2, it is possible to handle more patients than the conventional product even in the case of long-term treatment in which the entire body is fixed, and it is possible to further suppress pressure ulcers. The development of technology is desired. At the same time, it is also desired to further shorten the time required for preparing the patient's posture.

The present invention has been made in view of such a background, and the whole body is fixed while the patient's body position is stably fixed and the "bottoming feeling" and "hardness" are not transmitted to the patient. It is an object of the present invention to provide a medical posture fixing mat that can suppress pressure ulcers even when the treatment is performed for a long time and can shorten the time required for posture fixing preparation.

The medical position fixing mat of the present invention is a medical position fixing mat in which a cushion body is built in a gas impermeable bag body provided with an air supply / degassing portion, and the cushion body is the entire circumference. Foam beads are filled inside a gas permeable bag made of fabric made of woven or knitted fabric having a closed periphery, and the gas permeable bag is the two main bodies of the bag. It is a quilted bag body in which two fabrics constituting a plane are connected by a connecting portion, and the connecting portion does not intersect with each other on the surfaces of the two main planes, but on the longitudinal side of the peripheral portion. A plurality of foam beads are provided in parallel in a linear shape, and have a plurality of parallel foam bead filling spaces extending in the longitudinal direction with these connecting portions as boundaries, and each foam bead filling space is filled with foam beads having a predetermined average particle size. The average particle size of the foamed beads that are filled and filled in the foamed bead filling space at both ends in the lateral direction is smaller than the average particle size of the foamed beads that are filled in the foamed bead filling space other than these, and before degassing. After determining the position of the patient's position using the medical position fixing mat, the air inside the gas impermeable bag is degassed, so that the cushion body and the gas impermeable bag are brought into close contact with each other. By fixing the foamed beads inside the cushion body, all or a part of the patient's body is fixed.

On the surface of the gas impermeable bag body after degassing, the surface on the foamed bead filling space other than these is larger than the surface on the foamed bead filling space at both ends in the lateral direction. It is characterized by having.

The plurality of foamed bead filling spaces have substantially the same filling space volume, and the filling weight of the foamed beads filled in the foamed bead filling spaces at both ends in the lateral direction is the same as the foamed bead filling spaces other than these. It is characterized in that it is larger than the filling weight of the foamed beads to be filled.

In the gas permeable bag body, the two fabrics constituting the two main planes are different types from each other, and the fabrics constituting the main plane on the patient side are the fabrics constituting the main plane on the opposite side. It is characterized by having high elasticity.

The foamed beads filled in the foamed bead filling space at both ends in the lateral direction are polystyrene resin foam particles, and the foamed beads filled in the foamed bead filling space other than these are polystyrene resin and polyolefin resin. It is characterized in that it is a composite resin foam particle with.

The air supply / degassing portion has a ventilation pipe provided so as to penetrate the gas impermeable bag body, and on the inner side of the gas impermeable bag body of the ventilation pipe, in addition to the pipe port at the tip. It is characterized in that a ventilation hole is provided on the side surface of the pipe.

Since the medical position fixing mat of the present invention is composed of a gas permeable bag body having a gas permeable bag body having a plurality of foamed bead filling spaces filled with beads, the filled foam beads are the outer skin. It does not move freely in the gas impermeable bag. Therefore, the "feeling of bottoming out" and "hardness" are not transmitted to the patient before and during use. In addition, when using the posture fixing mat, it does not take time to smooth the patient in advance and fix the patient's posture, so that the time for idling the medical device and the time for setting the posture fixing mat can be shortened.

In addition, since the foamed bead filling space is shaped so as to be arranged parallel to the lateral direction, the patient can comfortably fix his / her body when lying on his / her back along the longitudinal direction. In addition, the movement of the foamed beads during deformation is restricted only in the longitudinal direction, and the beads can be appropriately deformed along the patient's body. Further, in this configuration, the average particle size of the foamed beads filled in the foamed bead filling spaces at both ends in the lateral direction is smaller than the average particle size of the foamed beads filled in the foamed bead filling spaces other than these, so that the foamed beads are removed. After the Qi, the part that covers the outside of the patient's body can be fixed without slippage, and the surface is soft on the central side, which is the load part that supports the patient's body, so that the entire body is fixed and the treatment is performed for a long time. Even in some cases, bead can be suppressed. In addition, since the foamed beads having a relatively large particle size are filled in the filling space other than the foamed bead filling space at both ends in the lateral direction, the degassing time can be shortened.

Further, on the surface of the gas impermeable bag body after degassing, the surface on the foamed bead filling space other than these has a larger uneven portion than the surface on the foamed bead filling space at both ends in the lateral direction. Therefore, on the surface on the central side of the mat, the softness (easiness of deformation) and air permeability of the surface are improved.

Further, the foamed beads filled in the foamed bead filling space at both ends in the lateral direction are polystyrene resin foam particles, and the foamed beads filled in the foamed bead filling space other than these are polystyrene resin and polyolefin-based. Since it is a composite resin foam particle with a resin, a composite resin of a polystyrene resin and a polyolefin resin is arranged on the central side, which is a load portion that supports the patient's body, and the repulsive force can suppress decubitus.

Further, the air supply / degassing part has a ventilation pipe provided so as to penetrate the gas impermeable bag body, and on the inner side of the gas impermeable bag body of the ventilation pipe, a pipe is added to the pipe port at the tip. Since the ventilation holes are provided on the side surface, clogging of the ventilation pipe can be prevented, and as a result, the degassing time can be shortened.

It is a perspective view of the body position fixing mat of this invention. It is a top view and a cross-sectional view of the body position fixing mat of this invention. It is an enlarged view of the mat surface. It is an enlarged view of the tip part of the ventilation pipe of a control valve. It is a figure which compares before and after deaeration of a posture fixing mat.

An example of the posture fixing mat according to the present invention will be described with reference to FIGS. 1, 2, and 5. FIG. 1 is a perspective view of the body position fixing mat, FIG. 2 (a) is a plan view through which the internal structure thereof is transmitted, and FIG. 2 (b) is a cross-sectional view thereof. Further, FIG. 5 is a photograph of an example of a posture fixing mat, FIG. 5A shows a state before degassing, and FIG. 5B shows a state after degassing.
As shown in FIG. 1, the external shape of the posture fixing mat 1 is a substantially rectangular parallelepiped shape having a certain thickness before degassing. The overall size may be such that the patient can hold it when lying on the mat or the like. As a specific size, the length in the longitudinal direction is about 150 to 200 cm, and the length in the lateral direction is about 50 to 90 cm. Further, as shown in FIGS. 5A and 5B, the posture fixing mat 1 is deformed according to the posture of the patient by degassing while the patient is on the mat before degassing. , It is fixed to the shape after deaeration is completed.

As shown in FIG. 2, the posture fixing mat 1 has a cushion body 3 (indicated by a broken line in FIG. 2A) built in the gas impermeable bag body 2. The gas impermeable bag body 2 is provided with an adjusting valve 4 for adjusting the amount of air in a part thereof. The gas impermeable bag 2 has flexibility to be deformed according to the patient's body position and gas impermeable to keep the gas inside the bag airtight. The structure of the gas impermeable bag body 2 may be any shape as long as it can accommodate the cushion body 3 inside. Preferably, the shape is larger than the shape of the cushion body 3 and the peripheral portion of the bag body having a shape similar to that of the cushion body 3 is sealed.

The material for forming the gas impermeable bag body 2 is preferably a gas impermeable resin sheet, and examples of the resin sheet include polyolefins such as polyurethane, polyester, polyvinyl chloride, polyamide, polyethylene and polypropylene. Be done. Further, an ethylene-vinyl alcohol copolymer film having a high air permeability, a three-layer laminated film having a layer of polyvinylidene chloride film, and a laminated film having an aluminum layer can also be used.

The cushion body 3 has a structure in which foamed beads are filled inside the gas permeable bag body. The gas permeable bag is a quilted bag in which two fabrics constituting the two main planes 3a and 3b of the bag are connected to each other by a connecting portion 3c. Further, the gas permeable bag has a peripheral portion 3d whose entire circumference is closed. The two main planes 3a and 3b have a bag shape due to the closed peripheral portion 3d. A plurality of connecting portions 3c are provided linearly parallel to the sides of the peripheral portions in the longitudinal direction X without intersecting each other on the surfaces of the two main planes 3a and 3b. The gas permeable bag has a plurality of parallel foamed bead filling spaces 5a and 5b extending in the longitudinal direction X with the connecting portion 3c as a boundary, and the foamed beads 6 and 7 are filled in the filling space.

The foamed bead filling spaces 5a and 5b have a shape in which they are arranged in parallel in the lateral direction Y. Since the patient sleeps on his back along the longitudinal direction X, there is no step in the longitudinal direction, and the legs and the like can be arranged along the connecting portion 3c extending in the longitudinal direction, so that the body can be comfortably fixed. In addition, since the movement of the filled foam beads during deformation is restricted only in the longitudinal direction and does not move in the lateral direction, it is possible to prevent the beads from spreading too much from the load area to the surroundings, and to the patient's body appropriately. Can be transformed along. In addition, since it is a simple parallel arrangement, foamed beads can be filled in any space from the end on the same side, and the filling workability at the time of manufacturing is excellent.

In the example of FIG. 2, the foamed bead filling spaces 5a and 5b have a shape in which four are arranged in parallel in the lateral direction Y. The number of foamed bead filling spaces is not particularly limited, and may be further subdivided to about 5 to 10. Considering the time and effort required for filling and the deformability during fixing, the number is preferably 4 to 6. The connecting portion 3c is provided so as to secure the required number of foamed bead filling spaces. In addition, the volume of each foamed bead filling space is substantially the same regardless of the number. Since the length is the same in the longitudinal direction X, the volume can be made substantially the same by making the length (width of each space) in the lateral direction Y substantially the same.

Further, the cushion body 3 has a peripheral portion 3d that closes the periphery of the gas permeable bag body. The peripheral portion 3d may be closed to the extent that the filled foam beads do not dissipate when the mat is used. It is preferable that the peripheral portion 3d connects the ends of the two main planes 3a and 3b and is reinforced by edging with a separate cloth. By providing a edging, it is possible to prevent the cloth from fraying.

It is preferable that the cushion body 3 is built in the gas impermeable bag body 2 without being fixed to the gas impermeable bag body 2. Further, since the cushion body 3 is a quilted bag body, the two main planes 3a and 3b can be deformed while maintaining flatness. In the present invention, when the two main planes maintain flatness, the foamed beads are not extremely concentrated or dispersed in a certain place to form a non-matte shape, and the initial matte shape is maintained to some extent. It means that the shape is deformed according to the patient's body shape.

Examples of the cloth forming the gas permeable bag body constituting the cushion body 3 include a knitted woven cloth and the like. In this case, in the two main planes 3a and 3b, the knitted fabric becomes a quilted bag body and forms the outer skin of the cushion body 3. It is mainly formed of a single-layer knitted fabric, but can be made of multiple layers if necessary. When making a bag from knitting, a circular knitting machine can be used to knit two knitted fabrics on the front and back at the same time to form a bag. The weaving method of the knitted fabric is not particularly limited, and any known weaving method such as plain weave or twill weave may be used. In the present invention, a weave to the extent that the foamed beads do not dissipate is essential, but it is also preferable to have air permeability through which the compressed gas can pass when the foamed beads are filled. Further, it is preferable to use a polyether ester-based elastic yarn or a polyurethane-based elastic yarn to obtain an elastic fabric having elastic recovery as a whole knitted fabric.

In the gas permeable bag body, the two fabrics constituting the two main planes 3a and 3b are connected to each other at the peripheral portion and the connecting portion. As a connecting method, the two fabrics are sewn together or the two fabrics are knitted at the same time. Sewing is formed by overlapping and sewing two pieces of fabric, and simultaneous knitting is a method of forming a connecting portion or the like at the time of forming the fabric.

The two fabrics forming the two main planes may be of the same type or different types of each other. When the two fabrics constituting the two main planes are of different types, the fabrics constituting the main plane 3a on the patient side are elastically recoverable with respect to the fabrics constituting the main plane 3b on the opposite side. It is preferable that it has strong high elasticity. With such a configuration, the lower surface of the mat does not come into contact with the mat resting table or the like and is not significantly deformed, while the surface on the patient side is easily deformed flexibly along the body shape of the patient. In addition, a certain degree of surface softness can be ensured even after degassing, and pressure ulcers can be suppressed even after long-term use. The fabric on the main plane opposite the patient may be non-stretchable.

The present invention is characterized in that the average particle size of the foamed beads filled in the cushion body 3 differs depending on the foamed bead filling space. In particular, the average particle size of the expanded beads 6 filled in the expanded bead filling spaces 5a at both ends in the lateral direction is set to be smaller than the average particle size of the expanded beads 7 filled in the other expanded bead filling spaces 5b. There is. That is, the foam beads 6 having small particles are filled on both ends in the width direction of the patient's body, and the foam beads 7 having large particles are filled in the center side in the width direction of the patient's body. Foam beads with a small particle size harden to the surface after degassing, whereas those with a large particle size have a slight softness on the surface even after degassing. With this configuration, after deaeration, the body can be fixed without deviation in the portion covering the outside of the patient's body. In addition, on the central side, which is a load portion that supports the patient's body, pressure ulcers can be suppressed even after long-term use due to the slight surface softness described above. Further, on the central side, due to the large particle size, the air permeability is excellent and it becomes difficult to get stuffy. In addition, since foamed beads having a relatively large particle size are used, the degassing time can be shortened.

Here, FIG. 3 shows the state of the surface of the posture fixing mat after degassing. FIG. 3A shows the surface of the mat (part A in FIG. 5) corresponding to the positions of the foamed bead filling spaces at both ends in the lateral direction, and FIG. 3B shows the foamed bead filling space on the center side in the lateral direction. It is the surface of the mat corresponding to the position (part B in FIG. 5). As shown in FIG. 3B, on the surface of the mat after degassing, that is, the surface of the gas impermeable bag 2 after degassing, the foam beads 7 are filled in the foam bead filling space 5b on the central side. Since the particle size of the beads is large, many large uneven portions 8 corresponding to the particle shape are likely to be formed on the surface. The uneven portion 8 becomes a slight groove, which contributes to the improvement of surface softness and the improvement of air permeability. On the other hand, as shown in FIG. 3A, the particle size of the foamed beads 6 filled in the foamed bead filling space 5a is small on the mat surface corresponding to the positions of the foamed bead filling spaces 5a at both ends in the lateral direction. , It does not appear to the extent that it can be recognized as an uneven portion, or even if an uneven portion is formed, the size is smaller than that on the center side. The term "large uneven portion" means that the height or depth of the concave-convex shape is large and the width of the convex portion or concave portion is wide.

The filling ratio of the foam beads is determined by the use and function of the cushion body, the size and number of connecting portions, the material of the fabric, and the like. Further, the filling weight of the foamed beads filled in the cushion body may differ depending on the foamed bead filling space. For the same reason as in the case of the above average particle size, in order to make the central side, which is the load part that supports the patient's body, flexible with respect to the outside, it is not good when the volumes of the foamed bead filling spaces are the same. It is preferable that the filling weight of the foamed beads filled in the foamed bead filling spaces at both ends in the direction is larger than the filling weight of the foamed beads filled in the foamed bead filling spaces other than these.

The foamed beads 6 and 7 are preferably spherical foamed beads having an average particle size of 0.1 to 8.0 mm as a whole. The foaming ratio is 30 to 90 times, preferably 50 to 90 times. If the average particle size is less than 0.1 mm, it tends to dissipate from the fabric, and if it exceeds 8.0 mm, the texture as a quilted product is inferior. The average particle size is a value measured by a laser diffraction / scattering method.
The average particle size of the foamed beads 6 filled in the foamed bead filling space 5a at both ends in the lateral direction is preferably 0.1 to 2.0 mm, more preferably 0.5 to 1.5 mm, and 0.7. ~ 1.0 mm is more preferable. The average particle size of the foamed beads 7 filled in the other foamed bead filling space 5b is preferably 4.0 to 8.0 mm, more preferably 5.0 to 7.0 mm, and preferably 5.0 to 6.0 mm. More preferred.

The material of the foam beads 6 and 7 filled in the foam bead filling space of the cushion body 3 is preferably a foamable thermoplastic resin. Examples of the thermoplastic resin include polystyrene-based resins, polyolefin-based resins such as polypropylene-based resins and polyethylene-based resins, polyethylene terephthalates, polybutylene terephthalates, polyethylene naphthalates, polyester-based resins such as polylactic acid, and polycarbonate-based resins. .. These can be used as foam particles made of a single resin or foam particles made of a composite of a plurality of resins. As the foam particles in which a plurality of resins are composited, a composite resin of a polystyrene-based resin such as a butyl acrylate / styrene polymer and a polyolefin-based resin can be used. Further, as the foaming agent, a known foaming agent (propane, butane, pentane, etc.) can be used.

Among the above, the foamed beads 6 filled in the foamed bead filling space 5a at both ends in the lateral direction are designated as polystyrene resin foam particles, and the foamed beads 7 filled in the foamed bead filling space 5b other than these are designated as polystyrene resin. It is preferable to use composite resin foam particles with a polyolefin resin. In particular, pressure ulcers can be suppressed by using a composite resin of a polystyrene resin and a polyolefin resin having excellent repulsive force on the central side, which is a load portion that supports the patient's body. Examples of commercially available composite resins having such excellent repulsive force include Empole NEO (registered trademark) manufactured by JSP.

The surfaces of the foam beads 6 and 7 are preferably slippery treated. By the slippery treatment, the foamed bead filling space of the cushion body is filled and the fluidity of the foamed beads is improved, so that a feeling of sitting can be given when used as a posture fixing mat. Examples of the slippery treatment method include a method of applying a highly viscous liquid, a solid lubricant, or the like to the surface of foamed beads. A method of applying a highly viscous liquid is preferable in terms of work. Examples of the highly viscous liquid include glycerin, polybutene, polyethylene glycol, liquid paraffin, and silicone oil. Examples of the solid lubricant include graphite powder and fluororesin powder. Of these, glycerin is preferable in terms of work. Further, the foamed beads can be blended with a fragrance, a negative ion generator, a far infrared powder, or the like, if necessary.

As a method of filling the foamed bead filling spaces 5a and 5b of the cushion body 3, for example, a known method as described in the above-mentioned Patent Document 2 can be adopted. A predetermined amount of foamed beads is filled from the filling port on one end face in the longitudinal direction of the foamed bead filling space, and then the filling port is sewn and sealed. This work is sequentially performed for each foamed bead filling space, and the entire space is filled. Since the cushion body is sealed by sewing after filling the filling port, the foamed beads can be sealed without being dissipated. Further, in the present invention, since the types of the foamed beads 6 filled in the foamed bead filling spaces 5a at both ends in the lateral direction and the foamed beads 7 filled in the foamed bead filling space 5b other than these are different, first, the center. A method can be adopted in which the predetermined foamed beads 7 are sequentially filled in the foamed bead filling space 5b on the side, and then the predetermined foamed beads 6 are sequentially filled in the foamed bead filling spaces 5a at both ends in the lateral direction.

As shown in FIG. 2A, the cushion body 3 filled with the foam beads 6 and 7 is inserted into the gas impermeable bag body 2, and then the gas impermeable bag body 2 is sealed. The body position fixing mat 1 is obtained. As a method for sealing the gas impermeable bag 2, a method such as welding or adhesion can be used. An adjustment valve 4 serving as an air supply / degassing portion is provided at an arbitrary location in the gas impermeable bag body 2. The adjusting valve 4 has a ventilation pipe 4a that penetrates the inside and the outside of the bag body 2. Here, as shown in FIG. 4, the ventilation pipe 4a of the adjustment valve preferably has a structure having a ventilation hole 4c on the side surface of the pipe in addition to the pipe opening 4b at the tip. With this structure, even if the pipe opening 4b sucks in a part of the fabric of the cushion body 3 and becomes clogged during degassing, the degassing can be continued from the ventilation hole 4c. Further, as shown in FIG. 2A, the ventilation pipe 4a of the adjustment valve 4 is intubated in the vicinity of the foamed bead filling space on the central side of the cushion body 3 in the lateral direction Y to ventilate around the tip of the pipe. It has excellent properties and can stably degas the air inside the gas impermeable bag 2 to the end. It is preferable to use a check valve as the adjusting valve 4.

As a detailed method for producing the posture fixing mat 1 shown in FIGS. 1 and 2, for example, the following method can be mentioned. First, using the above-mentioned resin sheet of the gas impermeable bag 2 as a material, the two sheets are turned inside out, welded except for one side in the longitudinal direction to fix the adjusting valve 4, and then turned over. It is made into a bag. After that, the cushion body 3 filled with foamed beads is inserted, and the remaining open piece is welded while sandwiching the ventilation pipe 4a of the adjusting valve 4 to seal the whole. In this method, it is possible to prevent the welded portion from protruding around the position fixing mat 1 except for the side on the fixed side of the adjusting valve 4. As a result, the appearance of the mat is excellent, and injuries during handling can be prevented.

As shown in FIG. 5, the posture fixing mat 1 has a structure in which a quilted cushion body in which foamed beads are housed in a gas permeable bag body is built in the gas impermeable bag body 2, and the entire body is before degassing. As flat, it does not take long to fix the patient's position. In addition, before degassing, the foam beads can move freely inside the cushion body, and since both the gas impermeable bag body 2 and the cushion body have flexibility, they deform while maintaining flatness according to the patient's position. It is possible.

After the position of the patient is determined, the adjustment valve 4 is opened and the air in the gas impermeable bag 2 is degassed by a vacuum pump or the like. As a result, the gas impermeable bag 2 and the cushion body are brought into close contact with each other. Since the foam beads are fixed inside the cushion body, the patient's position is fixed. Since the built-in quilted cushion body can maintain flatness with regular undulations, when fixing the patient, "bottoming feeling" and "hardness" are not transmitted to the patient. In particular, in the present invention, the foam beads of small particles are filled on both ends in the width direction of the patient's body, and the foam beads of large particles are filled in the center side of the body in the width direction of the patient, so that the outside of the patient's body is covered. The body can be firmly fixed without slipping in the part, and on the central side, which is the load part that supports the patient's body, the softness of the surface can suppress pressure ulcers even after long-term use, and it has excellent breathability and as a whole. The degassing time can also be shortened. Therefore, it is particularly suitable as a medical posture fixing mat used for long-term treatment.

The medical position fixing mat of the present invention is excellent in realizing flexibility to fit various body shapes and convenience of negative pressure for fixing a patient at the time of a surgical examination. Here, the negative pressure is, in medical terms, depressurizing, and means fixing the shape of the mat by depressurizing the inside of the cushion body filled with foamed beads.
This medical position fixing mat can be used, for example, as a position fixing mat for radiation / heavy particle beam irradiation in which the entire body is fixed and a position fixing mat for da Vinci treatment. It can also be used as a mat for a patient carrier. It is often used for long-term treatments and is often provided as a mat for each individual patient. For example, a treatment that requires a long time (3 to 4 hours) may reduce blood flow, but as described above, pay attention to the shape of the gas permeable bag, the foamed bead filling space, and the foamed beads to be filled therein. Due to the predetermined structure, the burden on the patient's skin from the mat can be particularly reduced, and pressure ulcers can be suppressed even during long-term treatment.

Since the medical posture fixing mat of the present invention has a structure in which the patient's posture is stably fixed and the "bottoming feeling" and "hardness" are not transmitted to the patient, the time required for the posture fixing preparation can be shortened. , Can be widely used as a position fixing mat for medical use. In particular, since pressure ulcers can be suppressed even when the entire body is fixed and the treatment is performed for a long time, it can be suitably used as a posture fixing mat for radiation / heavy ion beam irradiation and a posture fixing mat for da Vinci treatment.

1 Position fixing mat 2 Gas impermeable bag body 3 Cushion body 4 Control valve 5a, 5b Foam bead filling space 6 Foam beads (small)
7 Foam beads (large)
8 Concavo-convex part

Claims (6)

A medical posture fixing mat with a cushion body built inside a gas impermeable bag body provided with an air supply / degassing part.
The cushion body is formed by filling the inside of a gas permeable bag body made of a fabric made of woven fabric or knit, which has a closed peripheral portion, with foam beads.
The gas permeable bag is a quilted bag in which two fabrics constituting the two main planes of the bag are connected by a connecting portion, and the connecting portion is on the surface of the two main planes. A plurality of parallel foam bead filling spaces are provided in a line parallel to the longitudinal side of the peripheral portion without intersecting each other, and have a plurality of parallel foam bead filling spaces extending in the longitudinal direction with these connecting portions as boundaries.
Each foamed bead filling space is filled with foamed beads having a predetermined average particle size, and the average particle size of the foamed beads filled in the foamed bead filling spaces at both ends in the lateral direction is the foamed bead filling space other than these. Smaller than the average particle size of the foam beads filled in
After the position of the patient's position is determined using the position fixing mat before degassing, the air in the gas impermeable bag is degassed, so that the cushion body and the gas impermeable bag are brought into close contact with each other. A medical posture fixing mat, characterized in that all or a part of the patient's body is fixed by fixing the foamed beads inside the cushion body. On the surface of the gas impermeable bag body after degassing, the surface on the foamed bead filling space other than these is larger than the surface on the foamed bead filling space at both ends in the lateral direction. The medical position fixing mat according to claim 1, wherein the mat has. The plurality of foamed bead filling spaces have substantially the same filling space volume, and the filling weight of the foamed beads filled in the foamed bead filling spaces at both ends in the lateral direction is applied to the foamed bead filling spaces other than these. The medical position fixing mat according to claim 1 or 2, characterized in that it is larger than the filling weight of the foamed beads to be filled. In the gas permeable bag, the two fabrics constituting the two main planes are different types from each other, and the fabric forming the main plane on the patient side becomes the fabric forming the main plane on the opposite side. The medical position fixing mat according to any one of claims 1 to 3, which is characterized by having high elasticity. The foamed beads filled in the foamed bead filling space at both ends in the lateral direction are polystyrene resin foam particles, and the foamed beads filled in the foamed bead filling space other than these are polystyrene resin and polyolefin resin. The medical position fixing mat according to any one of claims 1 to 4, characterized in that it is a composite resin foam particle of the above. The air supply / degassing portion has a ventilation pipe provided so as to penetrate the gas impermeable bag body, and in addition to the pipe port at the tip on the inner side of the gas impermeable bag body of the ventilation pipe. The medical position fixing mat according to any one of claims 1 to 5, wherein a ventilation hole is provided on the side surface of the pipe.

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