JP2016087290A - cushion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that adjustment and shaping are required in each case for every bedridden patient.SOLUTION: A part supporting the heel (heel part 30b) is especially provided, separately from a part supporting the calf (calf part 30a), and a harder cushioning material (core material 30c) is arranged below the part supporting the heel so as to support an upper cushioning material. As a result of this, ways of supporting the calf part and the heel part are individually adjusted, and the heel part to which a weight is applied is hardly deformed. The usage is possible and simplifies work by a nurse and a care person for preventing bedsore of a patient.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cushion, and more particularly to a cushion.

  Bedridden patients are more susceptible to pressure ulcers. As a site where pressure ulcers are likely to occur, heels (spots) are raised. One reason is that the weight of the lower leg concentrates on the saddle point, resulting in poor blood circulation. Therefore, the nurse puts a plurality of cushions between the lower leg of the bedridden patient and the bed surface so that the saddle point is slightly lifted from the bed surface.

  In addition, although a body pressure dispersion bedding is known, it is insufficient for prevention of pressure ulcer.

As in the prior art, a nurse adjusts an optimal height after shaping using a plurality of cushions. However, for each bedridden patient, adjustments may not always be made well even if they are adjusted and shaped. Moreover, since adjustment is performed based on intuition each time, it takes time and effort.
The present invention provides a cushion that can be used for pressure ulcer prevention.

  The present invention comprises a bag-shaped skin and a cushion body covered with the skin, and the cushion body is generally wedge-shaped, having a low end on one end and a high end on the other in the length direction. In the direction, the cushion material is formed by a first cushion material and a second cushion material, respectively, dividing the interior between the low side and the high side, and is not at the upper surface side in the height direction, On the side close to the end on the high side, a third cushion material that is harder to deform than the second cushion material on the upper side is provided, and the upper surface side of the skin and the cushion body is not fixed to each other, It is configured to be able to slide on each other.

  The said structure WHEREIN: The said cushion main body is a substantially wedge shape in the length direction, and in other words, the one end side is low and the other end side is high. When using, turn the lower side to the knee side and the higher side to the heel side. The wedge shape indicates that the cross-sectional shape is narrow at one end and wide at the other end, and is easily deformable due to the nature of a cushion, and is limited to a shape that strictly functions as a wedge is not.

  First, the cushion material forming the cushion main body is partitioned in the length direction between a low side and a high side. Each is formed of a first cushion material and a second cushion material. As a means for partitioning the cushion material, one formed by two separate cushion materials may be included, or the inside of one bag may be divided in the length direction and filled with the cushion material. By dividing in the length direction, for example, when a fluid cushion material is filled inside, even if one is shaped, the other may not be easily affected. This is because the cushion material flows as a whole in one case. Of course, the same thing can be said even if there is no fluidity, so it is not always necessary to be a fluid cushioning material. Further, the number of divisions is not limited to two and may be three or more. Moreover, you may use together dividing in the width direction and the height direction in addition to the length direction. Of course, it is included to divide diagonally in both directions, and may be divided into an inner peripheral side and an outer peripheral side in a plan view.

  The position that is not the upper surface side in the height direction of the cushion body means that the first cushion material or the second cushion material is disposed at least on the upper surface side. One cushion material and a second cushion material are arranged, and a third cushion material is arranged on the lower surface side. However, it is arranged inside the first cushion material or the second cushion material, or the first cushion material or the second cushion material is arranged on the upper surface and the lower surface, and the third cushion material is interposed therebetween. It may be arranged.

  The third cushion material is disposed on the side close to the end portion on the high side. Although it may be arranged on the high side and the low side, it is not arranged only on the low side. Even if it is said to be a high side, it may be in contact with the end portion on the high side, or may be in a state where it is located almost to the end portion. In the vicinity of the end portion, the second cushion material is located on the upper surface. The third cushion material is less likely to deform than the second cushion material on the upper side. The surface of the bed is flexible, and the second cushion material is deformed and supported when the patient's foot is placed on the second cushion material. However, a hard third cushion material is supported to prevent the patient's feet from touching the bed surface due to excessive deformation.

  The skin and the upper surface side of the cushion body are not fixed to each other but slide on each other. When the patient moves the foot, even if the surface of the patient's foot does not slip on the surface of the epidermis, the epidermis is not fixed, so the surface of the patient's foot and the surface of the epidermis remain in contact, The epidermis slides on the surface of the cushion body, eliminating friction and the like that the surface of the patient's foot receives, and protecting the surface and subcutaneous of the patient's foot.

The cushion body is formed by forming a lower side portion of the cushion body divided in the length direction with a shin part, and a higher side portion of the cushion body divided in the length direction is vertically divided into two. Thus, the upper part may be formed with a buttock and the lower part may be formed with a core material.
The cushion main body may be provided with a bag material separated from the inside, and a predetermined cushion material may be accommodated in each interior chamber.

The inflatable shin portion and the heel portion may be formed by accommodating pipe beads in each chamber of the bag material of the cushion body separated from the inside.
The pipe beads may be formed of metrocene polyethylene.
The skin may be formed of a stretchable material.
The skin may have a vertically symmetric cross section in the height direction.
You may arrange | position the pocket which accommodates a said 3rd cushion material inside the said skin.

The length direction may be 400 mm to 650 mm, the width direction may be 400 mm to 970 mm, and the height direction may be 10 to 200 mm.
The length of the collar portion may be 50 mm to 250 mm.
The length of the buttocks may be a range that can support a range in which the distance between the minimum crus and the outer fruit protrusion is allocated in the vertical direction around the minimum crus.

The height of the upper surface of the buttocks from the lower surface of the core material may be such that the saddle point is raised about 10 mm from the surface of the bed when the patient's foot is supported on the upper surface while being placed on the surface of the bed. Good.
The lowest side end of the calf shin may have a height of about 30 mm.

  The cushion of the present invention is provided with a part that supports the heel in addition to the part that supports the inflated shin, and further, a hard cushion material is disposed below the part that supports the heel to support the upper cushion material. I have to. As a result, the support method can be individually adjusted between the inflated shin portion and the heel portion so that the heavy heel portion is not easily deformed. Such use is possible, and the work of nurses and caregivers for prevention of pressure ulcers in patients can be simplified.

It is a perspective view of the cushion (cushion for preventing pressure ulcer) concerning one Embodiment of this invention. It is a figure which shows the state which classified the cushion main body functionally. It is a disassembled perspective view of a cushion main body. It is a schematic diagram which shows the condition which supports a patient's leg. It is a figure which shows the name of the site | part of a lower leg. It is a figure which shows a measurement location. It is a figure which shows the site | part of sitting position popliteal height. It is the figure seen from the sole which shows the height of the buttocks of a cushion. It is a side view which shows the height of the collar part of a cushion. It is a figure of the skeleton which shows the height of the buttocks of a cushion. It is a side view of the skin where a front end, a lower surface, and a rear end cross at right angles to each other. It is a side view of the epidermis made into the symmetrical shape. It is a side view of the epidermis which formed the pocket inside the epidermis. It is a side view which shows the process of mounting | wearing a cushion between a patient's lower leg and a bed. It is the figure seen from the direction of the sole which shows the process of mounting | wearing a cushion between a patient's lower leg and a bed. It is sectional drawing of the cushion in the width direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a cushion according to an embodiment of the present invention (cushion for preventing pressure ulcer), FIG. 2 shows a state in which the internal cushion main body is functionally classified, and FIG. The actual cushion body is shown in an exploded perspective view.
In the figure, the cushion 10 is composed of a bag-shaped skin 20 and a cushion main body 30 covered with the skin 20 and housed therein. In the length direction, the cushion 10 is low in one end side and high in the other end side, and has a substantially wedge shape.
When functionally classified, as shown in FIG. 2, the cushion body 30 includes an inflated shin portion 30 a corresponding to the lower side portion partitioned in the length direction and a portion corresponding to the higher side portion partitioned in the length direction. Among them, it is divided into upper and lower parts and is composed of an upper collar part 30b and a lower core material 30c. The inflated shin portion 30a corresponds to a first cushion material, the heel portion 30b corresponds to a second cushion material, and the core material 30c corresponds to a third cushion material. However, in this functional classification, the three parts do not need to be clearly divided, and it is sufficient that the members that perform these functions are arranged in each part, and each part is formed to overlap. Thus, it can be appropriately modified.

  For example, the cushion material forming the cushion main body 30 may be configured such that the inside is divided between the low side and the high side in the length direction. Each corresponds to a first cushion material and a second cushion material. As a means for partitioning the cushion material, one formed by two separate cushion materials may be included, or the inside of one bag material may be divided in the length direction and filled with the cushion material. By dividing in the length direction, for example, when a fluid cushion material is filled inside, even if one is shaped, the other may not be easily affected. This is because the cushion material flows as a whole in one case. Of course, the same thing can be said even if there is no fluidity, so it is not always necessary to be a fluid cushioning material. Further, the number of divisions is not limited to two and may be three or more. Moreover, you may use together dividing in the width direction and the height direction in addition to the length direction. Of course, it is included to divide diagonally in both directions, and may be divided into an inner peripheral side and an outer peripheral side in a plan view.

  The position that is not the upper surface side in the height direction of the cushion body 30 means that the first cushion material or the second cushion material is disposed at least on the upper surface side, and as an example, A first cushion material and a second cushion material are disposed, and a third cushion material is disposed on the lower surface side. However, it is arranged inside the first cushion material or the second cushion material, or the first cushion material or the second cushion material is arranged on the upper surface and the lower surface, and the third cushion material is interposed therebetween. It may be arranged.

  The third cushion material is disposed on the side close to the end portion on the high side. Although it may be arranged on the high side and the low side, it is not arranged only on the low side. Even if it is said to be a high side, it may be in contact with the end portion on the high side, or may be in a state where it is located almost to the end portion. In the vicinity of the end portion, the second cushion material is located on the upper surface. The third cushion material is less likely to deform than the second cushion material on the upper side. The surface of the bed is flexible, and the second cushion material is deformed and supported when the patient's foot is placed on the second cushion material. However, a hard third cushion material is supported to prevent the patient's feet from touching the bed surface due to excessive deformation.

The cushion body 30 is actually formed as shown in FIG. The first cushion material and the second cushion material are formed of an integral pipe bead cushion 31, and the third cushion material is formed of a urethane foam cushion 32 as a separate body.
The pipe bead cushion 31 is formed of a mesh-like bag (bag material) 31a and pipe beads 31b filled therein. Inside the mesh bag 31a, a partition wall 31a1 is divided into two chambers by the same material. Of course, it is divided into two chambers of a low side and a high side in the length direction. In actual size, the high side has a capacity of 7 liters, and the low side has a total length of 500 mm, 14.5 liters, and a total length of 550 mm, 17 liters. In this embodiment, there are two chambers, but it may be further subdivided.

While the pipe bead cushion 31 is very easily deformed, the urethane foam cushion 32 has a predetermined overall shape, and if there is no load, it tries to return to that shape. Although the hardness varies, in the case of the present cushion 10, a hard material is selected as compared with the flange portion 30 b in the upper pipe bead cushion 31. The upper heel part 30b is easily deformed, and when the heel part 30b is shaped by placing the present cushion 10 on the bed, the core part 30b has a certain degree of hardness so that the same heel part 30b has a certain shape. This is because it needs to be easy to maintain.
In this embodiment, the urethane foam cushion 32 is adopted, but it goes without saying that it can be formed of other materials. For example, a polyethylene resin foam (polyethylene foam) may be used. In the case of this polyethylene resin foam (polyethylene foam), there is an advantage that it is flexible and does not fade, and has excellent buffering properties and is gentle to the human body.

  In this embodiment, pipe beads 31b are used, and the pipe beads 31b are flexible. In the case of a normal bead cushion, it is easy to change the overall shape, but once the outer shape is changed, the flexibility of the cushion is roughly proportional to the hardness of the individual beads. Since the beads themselves are spherical, the degree of flexibility is actually not high. Although the low resilience cushion can disperse body pressure, once the shape is determined, the resistance is great when trying to deform further, and it is not very soft.

On the other hand, by using the flexible pipe beads 31b, it is easy to deform the entire shape, and even after the shape is once determined, the ease of deformation of the individual pipe beads 31b remains unchanged. Flexibility is better than others. In this embodiment, this pipe bead 31b uses a metallocene catalyst linear short chain branched polyethylene (metrocene polyethylene) (LLDPE). That is, it is a polymer polymerized using a metallocene catalyst (Kaminsky catalyst) and is a kind of L-LDPE. Characteristic features include low molecular weight component and low stickiness component, low molecular elution and low polyethylene odor, crystal size is uniform and can produce highly transparent resin with good transparency, low lamella and low tie molecule The melting point is excellent in impact resistance, and it is easy to adjust the uniformity of the main chain and the branching degree of the side chain, so that the resin can be controlled from a low temperature to a general purpose.
The pipe bead 31b is also characterized by good air permeability. Although there is a moist environment as a cause of pressure ulcers, the use of pipe beads 31b with good air permeability makes it difficult to develop pressure ulcers without creating a moist environment. In contrast, ordinary beads are inferior to pipe beads in terms of air permeability.

FIG. 4 is a schematic diagram showing the situation where the patient's lower leg is supported, FIG. 5 shows the name of the lower leg part, and FIG. 6 shows the measurement part.
When the patient's lower leg is supported by this cushion, the inflated shin part 30a is supported from slightly above the back of the knee, and in the lower part, is supported up to the slightly upper leg (point). The buttocks 30b and the core material 30c support the vicinity of the minimum leg (point). In order to determine the point to be supported, as shown in FIG.

And, centering on the average value of the minimum lower leg height, the value obtained by subtracting the average value of the outer cusp height from the average value of the lower leg minimum height is the length that supports the minimum necessary value assigned to the front and rear objects. . In particular,
103.1 (average value of minimum lower leg height) −61.8 (average value of outer cusp height) = 41.3 (difference)
41.3 (difference) x2 = 82.6 (the minimum supported length)
Supplement Maximum value 145-78 = 67 mm
Minimum value 72-45 = 27 mm
This minimum necessary support length is a range that can support a range in which the distance between the minimum crus and the outer protrusion is allocated in the vertical direction around the minimum crus portion, and indicates the length of the buttock 30b. ing.
In this sense, the length of the collar portion may be in a range of approximately 50 mm to 250 mm, and is preferably 54 (27 × 2) mm to 134 (67 × 2) mm including the above range.

The calculation of the overall length of the cushion 10 was based on the following measurement. FIG. 7 is a diagram showing a portion of the seated popliteal height.

In order to support up to the value obtained by subtracting the external protrusion height from the sitting knee height, and the area above the back of the knee, the external protrusion height is subtracted from the average value of the sitting popliteal height.
367.2 (average value of sitting popliteal height) −61.8 (average value of epiphyseal height) = 305.4 mm
Maximum value 444.0 (average value of sitting popliteal height) −83.0 (average value of epiphyseal height) = 361.0 mm
It becomes.
When the entire length of the cushion 10 is set to 500 mm, the distance from the back of the knee to the area above the back of the knee is 194.6 mm on average, so that the cushion 10 is sufficiently supported. Further, since the difference between the average value and the maximum value is about 50 mm, the length of the entire large cushion was set to 550 mm.

Of course, the length is not limited to 500 mm or 550 mm as long as it satisfies the above viewpoint, and it is considered that the length generally includes the range of 400 mm to 650 mm.
The height of the collar portion 30b of the cushion 10 was based on the following measurement. FIG. 8 shows a view seen from the sole, FIG. 9 shows a view seen from the side, and FIG. 10 shows a skeleton.

Since the heel point is below the minimum leg point, the distance from the minimum leg point to the heel point (in the case of adult men and women, the average value was 23 mm at the maximum) must be raised. If the distance between the saddle point and the outer fruit is maintained, it is unlikely that the distance will be less than this distance from the position of the lowest leg encircling point, so the maximum value is 64 mm or more. Furthermore, in consideration of the sinking amount of the bag of the collar part 30b, the minimum was set to 90 mm.
In addition, since the height direction is considerably affected by the amount of subsidence, it is considered to include the range of 10 to 200 mm.

The height of the back of the knee is the height of the front end of the cushion 10 in the length direction. At first, the inventors designed to gradually incline from the rear end to the front end in the length direction, and finally adapt to the bed surface, but it is better to bend the knee slightly lightly to spine, buttocks and sacrum. , I found out that the burden of moths is small. For this reason, in order to support the area above the back of the knee, a height of about 30 mm was added for improvement.
In addition, it was set as 650 mm so that it would be enough to allow a person to place his / her feet naturally and cover about 70% of the width of a single bed of 970 mm. However, from the viewpoint described above, it is considered that the range of 400 mm to 970 mm is generally included.

11 to 13 show the skin 20 in a side view. FIG. 11 shows a bag-shaped skin 20a in which the front end, the lower surface, and the rear end intersect with each other at right angles and only the upper surface is inclined. In this case, if the lower surface to be placed on the bed is specified and the epidermis 20a is mistakenly attached upside down, it must be redone.
For this reason, as shown in FIG. 12, by making the skin 20b symmetrical in the vertical direction, the fact that the top and bottom are attached by mistake is eliminated. In this case, strictly speaking, although the cushion body 30 is not symmetrical in the vertical direction, it is assumed that the cross-sectional shape is originally deformed, so that there is almost no sense of incongruity due to the difference in cross-sectional shape.

Furthermore, as shown in FIG. 13, a pocket 20c1 was formed inside the epidermis 20c. The pocket 20c1 is sized to accommodate the urethane foam cushion 32. The pipe bead cushion 31 and the urethane foam cushion 32 are separate from each other, and the urethane foam cushion 32 is easier to properly support the upper pipe bead cushion 31 when it is fixed at a predetermined position. In other words, even if the urethane foam cushion 32 is accommodated inside the outer skin 20 as a firm cushion material, the upper pipe bead cushion 31 cannot be properly supported if the urethane foam cushion itself moves. On the other hand, if the pocket 20c1 as shown in FIG. 13 is provided, the urethane foam cushion 32 can be held at a predetermined position, and the above-described problems can be prevented.
The shape of the pocket can be changed as appropriate. In the figure, the entrance of the pocket 20c1 is open on the lower side of the pipe bead cushion 31, but may be open on the opposite side. In this case, since the opening for inserting the pipe bead cushion 31 is also formed in the skin 20, it is convenient that the pipe bead cushion 31 and the urethane foam cushion 32 can be inserted from the same direction. Instead of being supported by the pocket 20 c 1 of the skin 20, it may be attached to the pipe bead cushion 31 and housed inside the skin 20 together with the pipe bead cushion 31.

Next, the operation of the present embodiment having the above configuration will be described.
FIG. 14 is a side view showing a process of mounting the cushion 10 between the patient's lower leg and the bed.
As shown in FIG. 14, the nurse or caregiver sets the cushion 10 between the patient's lower leg and the bed. Alternatively, the present cushion 10 is set on the bed and the patient is laid on the bed so that the lower leg is on the present cushion 10. Note that the position in the length direction is adjusted so that the back of the knee is positioned on the rear side of the front end of the cushion 10. At this time, it is not necessary to deform the pipe bead cushion 31 constituting the first cushion material and the second cushion material so much.
Referring to FIG. 14, the heel is detached from the cushion 10. Although such a usage method is a basic usage method, it is not necessarily limited to such a usage method. Depending on the patient, using the lower leg including the heel on the cushion 10 may reduce pressure and prevent pressure ulcers.

FIG. 15 shows a state seen from the direction of the soles.
If there is no third cushion material, the surface of the bed is likely to sink, and the cushion 10 is bent in the width direction so as to be concave as shown in FIG. In this case, it is difficult to avoid a state in which the saddle point is pressed against the surface of the bed. However, by arranging a hard third cushion material below at least the collar portion 30b, it is possible to prevent bending upward so as to be convex.

Starting from such a state, the nurse or caregiver shapes the second cushion material and the pipe bead cushion 31 as the first cushion material according to the shape of the patient's lower leg. Ideally, the saddle point is always about 10 mm above the bed surface. Even if it is about 10 mm, the same effect can be expected if it is about 1 mm to 30 mm, and the effect can be expected most in the vicinity of 10 mm.
The inside of the pipe bead cushion 31 is divided into a calf part 30a and a collar part 30b, and since both are filled with the pipe bead 31b, it is possible to adjust the deformation. At this time, since the heel part 30b is partitioned from the inflated shin part 30a, after shaping the heel part 30b, the fluid pipe beads 31b easily flow to the inflated shin part 30a side. Therefore, it can be prevented that the shape cannot be maintained. In order to make it easy to adjust the shape, the inside of the collar portion 30b can be further divided into a plurality of sections, so that the shape can be relatively easily maintained at each portion. Further, the inflated shin part 30a has a capacity of 14.5 liters or 17 liters and is larger than 7 liters of the collar part 30b. As a result, the inflated shin portion 30a is slightly more gently supported, and the burden on the patient can be reduced.

FIG. 16 shows a cross-sectional state in the width direction.
The skin 20 is not fixed to the cushion body 30 and is made slippery while the surfaces of both are in contact with each other. The material of the skin 20 and the material of the bag 31a of the cushion body 30 greatly contribute to whether or not to make it slippery. Specifically, it is preferable that the friction coefficient between the material of the skin 20 and the material of the cushion body 30 is low. However, the friction coefficient of the surface of the epidermis 20 that contacts the patient's lower leg and the like should not be too low. This is because if it is slippery, the foot will not fit properly. For this reason, the back surface may be a fabric that is more slippery than the front surface. In the present embodiment, the skin 20 is made of a stretchable material of polyester, and an appropriate slipperiness is obtained. Further, the bag material of the cushion main body 30 is also formed of a polyester material.
When the patient's body moves while sleeping, the heels and lower legs are moved unconsciously. At this time, since the epidermis 20 slides on the surface of the cushion body 30 while being in contact with the heel and the lower leg, the skin of the patient's heel and the lower leg is not strongly pulled. When pulled strongly, the burden on the bedridden patient's skin is increased, which tends to contribute to the onset and worsening of pressure ulcers. The material of the skin 20 is used because it has good air permeability, and any material that has good air permeability in addition to stretchability can be used regardless of the name. That is, the skin 20 is preferably one having good stretchability and good air permeability.

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
-Applying the combination of the mutually replaceable members and configurations disclosed in the above-described embodiments as appropriate-The above-described embodiments are not disclosed in the above-described embodiments, but are publicly known techniques. The members and structures that can be mutually replaced with the members and structures disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art appropriately replaces the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and changes the combination to apply. It is disclosed as.

10 ... Cushion,
20 ... epidermis,
20a ... epidermis,
20c ... epidermis,
20c1 ... pocket,
30 ... cushion body,
30a ... Inflated shin,
30b ... Buttocks,
30c ... heartwood,
31 ... Pipe bead cushion,
31a ... bag (bag material),
31a1 ... wall,
31b ... Pipe beads,
32 ... Urethane foam cushion.

Claims (13)

A bag-shaped skin and a cushion body covered with the skin,
In the length direction, the cushion main body is low at one end side and high at the other end side, and is generally wedge-shaped,
In the length direction, the cushion material is formed by a first cushion material and a second cushion material, respectively, dividing the interior between the low side and the high side,
It is a position that is not the upper surface side in the height direction, and a third cushion material that is harder to deform than the second cushion material on the upper side is provided on the side close to the end on the high side,
A pressure ulcer prevention cushion characterized in that the upper surface side of the epidermis and the cushion body are not fixed to each other and can slide on each other.   The cushion body is formed by forming a lower side portion of the cushion body divided in the length direction with a shin part, and a higher side portion of the cushion body divided in the length direction is vertically divided into two. The cushion according to claim 1, wherein the upper part is formed of a buttock and the lower part is formed of a core material.   The cushion according to claim 1 or 2, wherein the cushion body includes a bag material separated from the inside, and a predetermined cushion material is accommodated in each of the interior chambers.   The cushion according to claim 3, wherein the inflated shin part and the heel part are formed by accommodating pipe beads in each chamber of the bag material of the cushion body separated from the inside.   The cushion according to claim 4, wherein the pipe bead is made of metrocene polyethylene.   The cushion according to claim 1, wherein the skin is made of a stretchable material.   The cushion according to any one of claims 1 to 6, wherein the skin has a vertically symmetric cross section in the height direction.   The cushion according to any one of claims 1 to 7, wherein a pocket for accommodating the third cushion material is disposed inside the outer skin.   The length direction is 400 mm to 650 mm, the width direction is 400 mm to 970 mm, and the height direction is 10 to 200 mm, The cushion according to claim 1, .   The length of the said collar part is 50 mm-250 mm, The cushion in any one of Claims 1-9 characterized by the above-mentioned.   The length of the buttocks is a range that can support a range in which the distance between the minimum lower crus and the outer fruit protrusion is allocated in the vertical direction centering on the minimum lower crus portion. Item 11. The cushion according to any one of Items 10.   The height of the upper surface of the buttocks from the lower surface of the core material is such that the saddle point is raised about 10 mm from the surface of the bed when the patient's foot is supported on the upper surface while being placed on the surface of the bed. The cushion according to claim 11, wherein the cushion has a height that allows the cushion.   The cushion according to any one of claims 1 to 12, wherein a height of an end portion on the lowest side of the inflated shin portion is about 30 mm.

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