JP6912129B2 - Local friction slip mitigation sheet and local friction slip mitigation method - Google Patents

Description

The present invention relates to a local friction displacement mitigation sheet that alleviates a displacement locally caused by friction between a body and clothing, bedding, etc., and in particular, a local friction displacement mitigation sheet that is attached to the body.

In the field of long-term care and nursing, pressure sores, so-called bedsores, that occur in people who spend a lot of time on beds and wheelchairs have become a problem. Pressure ulcers occur in specific areas of the skin, specifically in the vicinity of protruding bones such as the sacrum, heels, and greater trochanter, by maintaining the same posture for long periods of time.

The causes of pressure ulcers have been found to be compression and displacement. Since a large load is applied to the skin between the protruding bone and the bedding or the like, the site is compressed and blood flow is deteriorated. As a result, the compressed skin and the tissues that support the skin become necrotic, resulting in pressure ulcers. In addition, the displacement is caused by the friction between the skin and the bed when the electric bed is raised or the body is moved laterally on the bed, so that the skin moves. It is in a state of not being able to follow. It has been found that the displaced skin and the tissues that support it cause pain when a force is applied in a direction parallel to the body surface, and pressure ulcers occur even with weak pressure.

Conventionally, when preventing a pressure ulcer or treating a pressure ulcer, for example, as disclosed in Patent Document 1, the pressure applied to a specific site has been reduced. By reducing the pressure applied to a specific site in this way, it is possible to prevent pressure ulcers caused by compression. However, as described above, pressure ulcers occur even at a small pressure at the site where the pressure ulcer has occurred. Therefore, it is important to deal with the pressure ulcer in order to prevent the pressure ulcer more effectively.

Therefore, a tool such as a sliding sheet or a sliding glove is used to remove the displacement caused on the skin or the like. Further, Patent Document 2 discloses a seat cover for preventing displacement that occurs when the reclining seat is seated. The seat cover is formed by connecting a front portion facing the human body and a back portion facing the backrest at the upper end, and includes a fixing portion for fixing the upper portion of the back portion to the backrest, and the front portion and the back portion. A low friction coefficient member is arranged on the surfaces in contact with each other, and a high friction coefficient member is arranged on the outer surface of the front surface portion. Therefore, when shifting from the comfort sitting position to the backward tilting position, the lowering of the trunk is suppressed by the frictional force on the outer surface of the front portion. On the other hand, when returning from the backward leaning position to the comfortable sitting position, the front portion rises with respect to the back portion because the frictional force between the inner surface of the front portion and the inner surface of the back portion is small. Therefore, it is possible to reduce the buttock displacement force and prevent pressure ulcers.

Japanese Unexamined Patent Publication No. 2019-136202 JP-A-2017-079986

By using the sliding sheet or sliding glove as described above, it is possible to eliminate the displacement caused on the skin or the like. However, since this must be done by the caregiver or nurse, it is difficult to eliminate the deviation in a timely manner, and the state in which the deviation has occurred may continue. In addition, it will put a burden on caregivers and the like.

Further, if the seat cover of Patent Document 2 is used, the buttock displacement force when the reclining seat is used can be reduced. However, it is not possible to reduce the deviation that occurs when lying on the bed or in other parts.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a local friction slip mitigation sheet that can be applied to various parts and can always be used to alleviate local friction slip. ..

In order to solve the above problems, the local friction displacement mitigation sheet according to the present invention, which is attached locally to the body and alleviates the frictional displacement generated locally, is located on the side of the body and is a contact target on the first surface side. A first surface that comes into contact with an object and a second surface that is located on the opposite side of the first surface and abuts on the second surface side contact object are provided, and the second surface side contact object of the second surface is provided. Ri friction coefficient (JIS K7125 to those measured according to the method defined) of der 0.4 for things, the coefficient of friction with respect to the second surface contacting the object of the second surface, the first The friction coefficient with respect to the first surface side contact object on the one surface side (measured in accordance with the method specified in JIS K7125) is smaller than that of the first surface side contact object, and the first surface side contact object is attached locally. The friction coefficient of the first surface with respect to the dressing is smaller than the friction coefficient of the dressing with respect to the local area .

In this configuration, since the friction coefficient of the second surface that comes into contact with the clothes, bedding, etc. with respect to the second surface side contact object is the low friction coefficient as described above, the second surface side contact object such as clothes, bedding, etc. Even when the displacement is substantially parallel to the local surface, the second surface slides on the surface of the contact object on the second surface side, so that the friction generated locally is reduced and the occurrence of the displacement can be suppressed. .. The clothing in the present invention is worn so as to cover a local part of the body such as clothes, socks, diapers, etc., and the bedding, etc. is a local friction displacement mitigation sheet such as a futon, a mattress, a cushion, a cushion, a wheelchair, etc. It supports the body when the user spends a lot of time. Further, the fact that clothes, bedding, etc. are displaced substantially parallel to the local surface means that they are relatively displaced, and any force may act on them.

Further, by setting the friction coefficient between the first surface side and the second surface side in this way, when a force substantially parallel to the surface is locally applied, the second surface side becomes more slippery. .. Therefore, the force acting locally can be reduced.

When the local friction slip mitigation sheet according to the present invention is used on a site where a pressure ulcer is occurring, the pressure ulcer is covered with a dressing (an example of a contact object on the first surface side), and the local friction slip mitigation sheet is used from above. do. In this case, a force substantially parallel to the local surface may act on the local friction displacement mitigation sheet. At that time, if the dressing shifts due to the force, the pressure ulcer may be aggravated or the therapeutic effect on the pressure ulcer may be weakened. Therefore, if the friction coefficient for the dressing, which is the contact object on the first surface side of the first surface, is set as described above, the dressing can be suppressed from shifting, the deterioration of the pressure ulcer can be prevented, and the pressure ulcer can be treated. The therapeutic effect can be maintained.

The present invention also covers a local friction slip mitigation method for alleviating frictional deviations that occur locally in the body, and for such a local frictional displacement mitigation method, prepare any of the above-mentioned local frictional slip mitigation sheets. A step of attaching at least the vicinity of the peripheral edge of the local friction displacement mitigation sheet to the local area so that the first surface faces the body side.

This local friction shift mitigation method has the same effect as the local friction slip mitigation sheet.

Experiments by the inventors of the present invention have revealed that the local friction slip mitigation effect is high when the local friction slip mitigation sheet slides on the dressing which is the contact object on the first surface side. Therefore, in one of the preferred embodiments of the local friction shift mitigation method according to the present invention, the first surface side contact object is a dressing, and in the step of attaching the local friction slip mitigation sheet to the dressing. On the other hand, the local friction displacement mitigation sheet is attached to the local area so as not to be fixed.

It is (a) plan view and (b) cross-sectional view of the local friction displacement mitigation sheet. It is a top view which shows the use state of the local friction displacement relaxation sheet. It is a figure which shows the friction coefficient test method by JIS K7125. It is a figure which shows the use state of the local friction displacement relaxation sheet. It is a figure which shows the test method of the displacement force inside the skin. It is a graph which shows the time-series change of the frictional force measured by the test method of FIG. (A) A photograph of the affected area where a pressure ulcer has occurred, and (b) a photograph of the affected area after using a local friction displacement mitigation sheet.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1A is a plan view of the local friction displacement mitigation sheet 1 in the present embodiment, and FIG. 1B is a cross-sectional view taken along the line BB of FIG. 1A. As shown in FIG. 1 (b), the local friction displacement mitigating sheet 1 is formed on one surface of the sheet-shaped base material 11 and the base material 11, and is formed on one surface of the first layer 12 and the base material 11 on the other surface. The second layer 13 formed on the surface is provided. In this embodiment, nylon taffeta is used as the base material 11. Further, the first layer 12 and the second layer 13 are formed by thinly coating urethane and silicone resin on the base material 11, respectively. The outer surface of the first layer 12 is referred to as a first surface 12a, and the outer surface of the second layer 13 is referred to as a second surface 13a.

As will be described later, the local friction displacement mitigation sheet 1 is attached to a site where the displacement is desired to be mitigated or a site where a pressure ulcer is occurring (hereinafter, collectively referred to as a target site) so that the first surface 12a is on the body side. .. That is, the first surface 12a abuts on the skin and the dressing 3 (described later), and the second surface 13a abuts on clothes, bedding, and the like. When the local friction slip mitigation sheet 1 is attached to the target part and the clothes, bedding, etc. are displaced in a direction substantially parallel to the surface of the target part with respect to the local friction slip mitigation sheet 1, or the local friction slip mitigation is alleviated. If the sheet 1 is displaced with respect to the dressing 3 or the skin in a direction substantially parallel to the surface of the target portion, the sheet 1 may be displaced with respect to the target portion. In order to prevent this, in the present embodiment, the friction coefficient of the first surface 12a with respect to the first surface side contact object (hereinafter referred to as the first friction coefficient) and the second surface side contact object of the second surface 13a The friction coefficient with respect to (hereinafter referred to as the second friction coefficient) is set small. Specific values will be described later.

The first friction coefficient is a dressing when the local friction displacement mitigation sheet 1 is attached to the target site and the local friction displacement mitigation sheet 1 is displaced with respect to the dressing 3 or the skin in a direction substantially parallel to the surface of the target site. The size of the first surface 12a is set so as to slide on the dressing 3 and the skin so as not to pull the dressing 3 or the skin. When the dressing 3 is locally attached, the dressing 3 corresponds to the contact object on the first surface side of the present invention, and when the dressing 3 is not used, the local skin is the present invention. It corresponds to the contact object on the first surface side.

On the other hand, the second friction coefficient is such that when the local friction displacement mitigation sheet 1 is attached to the target portion, clothes, bedding, etc. are displaced relative to the surface of the target portion in a direction substantially parallel to the local friction displacement mitigation sheet 1. In this case, the size of the second surface 13a is set so as to slide on clothes, bedding, etc. so that the local friction displacement mitigation sheet 1 is not pulled. If the local area is covered with clothing, the clothing corresponds to the second surface side contact object of the present invention, and if the local area is not covered with clothing, the bedding or the like is the second aspect of the present invention. Corresponds to a surface-side contact object.

More specifically, the second coefficient of friction (measured according to the method specified in JIS K7125) is preferably 0.4 or less, more preferably 0.3 or less. On the other hand, the first friction coefficient (measured according to the method specified in JIS K7125) may be equal to or slightly larger than the second friction coefficient. In the present embodiment, the first friction coefficient is slightly larger than the second friction coefficient. In the present embodiment, the friction coefficient of the second surface is about 0.34 and the friction coefficient of the first surface is about 0.45 with respect to the bed sheets (100% cotton). Of course, these friction coefficients are not limited to these, and can be appropriately changed as long as the object of the present invention is achieved.

As shown in FIG. 1A, the index M is displayed on the first surface 12a. Specifically, the index M is printed as mirror writing on the first surface 12a so that it becomes a normal character or the like when viewed from the second surface 13a side. As will be described later, since the local friction displacement mitigation sheet 1 in the present embodiment has transparency, the user can visually recognize this index M from the second surface 13a side, and the first surface 12a and the like. It can be distinguished from the second surface 13a. Further, printing the index M on the second surface 13a may increase the friction coefficient of the second surface 13a, but this is prevented by forming the index M on the first surface 12a.

In the present embodiment, the local friction displacement mitigation sheet 1 has a size of 14 cm in length and 24 cm in width, and has a relatively large size. When using it, it may be used as it is, or it may be cut into an appropriate size according to the target site before use. In the present embodiment, as shown in FIG. 1A, a plurality of broken lines L that serve as a guide when cutting the local friction displacement mitigation sheet 1 are displayed on the first surface 12a. The broken line L can also be visually recognized from the second surface 13a side like the index M. The site where the displacement is alleviated is, for example, a site where a pressure ulcer is likely to occur, such as in the vicinity of a protruding bone such as the sacrum, ankle, or greater trochanter.

The local friction slip mitigation sheet 1 is attached to the body, and in particular, when used in a site where a pressure ulcer is occurring, breathability is very important from the viewpoint of preventing stuffiness in the affected area. In the present embodiment, the water vapor permeability (breathability) of the local friction displacement mitigation sheet 1 is set to 500 g / (m ² · day). In addition, transparency is also important for observing the condition of the skin or the like with the local friction displacement mitigation sheet 1 attached. The local friction displacement mitigation sheet 1 in the present embodiment has a transparency to the extent that the state of the dressing 3 and the skin can be observed in a state of being attached to the target site. Further, since the local friction displacement mitigation sheet 1 in the present embodiment has shape retention and has the original shape even after being washed after use, the use and washing can be repeated several times.

Depending on the method of use, it is not necessary to have all of breathability, transparency, and shape retention. For example, for the purpose of alleviating the frictional deviation of the site where the pressure ulcer does not occur, that is, for the purpose of preventing the pressure ulcer, the air permeability and the transparency can be lowered to some extent. Further, when it is not used repeatedly, the shape retention may be low.

A method of using the local friction displacement mitigation sheet 1 according to the present invention will be described with reference to FIG. The local friction displacement mitigation sheet 1 according to the present invention is attached to the body so as to cover the target portion 2. When used on a site where pressure ulcers occur, it is not used as a substitute for a dressing such as gauze, but a dressing 3 such as gauze is used and then attached so as to cover the dressing 3. In the following description, the case where the local friction displacement mitigation sheet 1 is used at the site where the pressure ulcer is generated will be described. When the local friction displacement mitigation sheet 1 is used for the prevention of pressure ulcers, it is not necessary to use the dressing 3.

First, the target site 2 is covered with a dressing 3 such as gauze to protect it (FIG. 2 (a)). Next, a local friction displacement mitigation sheet 1 slightly larger than the dressing 3 is prepared so that the dressing 3 can be completely covered, and the target portion 2 is covered together with the dressing 3 (FIG. 2B). At this time, it is confirmed by the index M which side is the second side 13a, the first side 12a is positioned on the body side, and the second side 13a is on the side opposite to the body, that is, clothes, bedding, etc. Position it on the side.

Since the first friction coefficient of the first surface 12a is very small, the local friction displacement mitigation sheet 1 itself has no adhesiveness. Therefore, in the present embodiment, the local friction displacement mitigation sheet 1 is attached to the body by the fixing tape 4. Specifically, the two opposing sides of the local friction displacement mitigation sheet 1 are fixed with the fixing tape 4 (FIG. 2 (c)). The four sides of the local friction displacement mitigation sheet 1 may be fixed with the fixing tape 4, but it is preferable to fix the two sides from the viewpoint of air permeability. Further, as the fixing tape 4, it is preferable to use a medical tape that is less irritating to the skin.

In the present embodiment, since the second friction coefficient of the second surface 13a is small, the adhesiveness of the fixing tape 4 to the second surface 13a is small. Therefore, it is preferable to rub the portion of the second surface 13a to which the fixing tape 4 is attached with sandpaper or the like to increase the friction coefficient of that portion.

In this way, not the entire local friction shift mitigation sheet 1 is fixed to the body, but only the edge of the local friction slip mitigation sheet 1 is fixed to the body. Therefore, the unfixed central portion of the local friction displacement mitigation sheet 1 is displaceable with respect to the body and the dressing.

[Friction coefficient test]
The results of the measurement test of the coefficient of friction between various materials are shown below. This measurement test was carried out in accordance with JIS K7125 (Plastic-film and sheet friction coefficient test method). Specifically, as shown in FIG. 3, a sheet-shaped test sample 101 is placed on the table 100. A sheet-shaped contact target material 102 is placed on the test sample 101, and a jig 103 is placed on the contact target material 102. The weight of the jig 103 is 200 g. A wire 104 stretched parallel to the upper surface of the table 100 is connected to one side surface of the jig 103. The wire 104 is guided upward by the pulley 105, and its end is connected to a load cell (not shown) or the like, and a tensile force having a speed of 100 m / min is applied. In JIS K7125, the test sample 101 is generally placed on the contact target material 102, but if it is arranged in such a manner, the contact target material 102 is deformed with respect to a load like urethane foam. In the case of a material, the above-mentioned arrangement is used because the influence on the measured friction coefficient may be large.

Table 1 shows the test results in which the material to be contacted was bed sheets (100% cotton) and the test sample was changed. The test results shown in the table below show the (mean value) ± (standard deviation) of the five measured values. In the measurement test shown in Table 1, as test samples, the local friction displacement mitigation sheet according to the present invention (hereinafter referred to as the product of the present invention), Multifix (registered trademark) roll (surgical film manufactured by ALCARE Co., Ltd.), and Limois (registered) Uses (trademark) pad (highly slippery skin care pad manufactured by ALCARE), Fomuraito (registered trademark, wound care product manufactured by ConvaTech), and gentle aid (wound care product manufactured by Smith & Nephew). ing. Further, in the following description, the second side of the product of the present invention is referred to as the front side, and the first side is referred to as the back side.

From this test result, it can be seen that the front side (second surface side) of the product of the present invention has a smaller coefficient of static friction and a coefficient of dynamic friction than those of other products. That is, when these test samples are locally attached, brought into contact with the bed sheets made of 100% cotton, which is the material to be contacted, and a force is applied to the bed sheets in a substantially parallel manner with respect to the local areas, the present invention is used. The product table (second side) is the most slippery.

Table 2 shows the test results in which the test sample was bed sheets (100% cotton) and the contact target material was changed. Further, Table 3 shows the test results in which the test sample is the front side of the product of the present invention and the contact target material is changed.

From these test results, it can be seen that the coefficient of static friction and the coefficient of dynamic friction for all the materials to be contacted are overwhelmingly smaller on the front side of the product of the present invention than on the bed sheets (100% cotton). Further, it can be seen that the friction coefficient of the second surface of the product of the present invention with respect to the clothes (clothes 1 to 6) is smaller than the friction coefficient of the clothes with respect to the bed sheets. That is, when the second surface of the product of the present invention is in contact with the clothes as the second surface side contact object, and the clothes are in contact with the bed sheets, when a force substantially parallel to the local area acts on the bed sheets. In addition, it can be seen that the product of the present invention is slippery with respect to clothing.

Table 4 shows the friction coefficient of each test sample when the contact object is the skin of a healthy person. SI Aid (registered trademark) is a dressing of ALCARE Co., Ltd. Further, Table 5 shows the friction coefficient of the product of the present invention when the contact object is SII Aid.

As shown in FIG. 4, four types of methods for using the local friction displacement mitigation sheet according to the present invention can be generally assumed. FIGS. 4 (a) and 4 (b) show a state in which a dressing is used, and is generally used in a site where a pressure ulcer is occurring. These differ in whether or not the part is covered with clothing. On the other hand, FIGS. 4 (c) and 4 (d) show a state in which no dressing is used, which is generally used for prevention of local pressure ulcers. These also differ in whether or not the part is covered with clothing. In any case, the product of the present invention is arranged so that the first surface is on the upper side, that is, on the skin side.

In the model of FIG. 4A, the friction coefficient with respect to the dressing (contact object on the first surface side) of the first surface of the product of the present invention is σ1 (first friction coefficient), and the clothing of the second surface of the product of the present invention (first surface). The friction coefficient with respect to the two-sided contact object) is σ2 (second friction coefficient), the friction coefficient with respect to the skin of the dressing is σ3, and the friction coefficient with respect to the sheets of clothing is σ4. At this time, the relations of σ2 <σ1, σ2 <σ4, and σ1 <σ3 are derived from the above test results. That is, when a force substantially parallel to the skin acts on the human body in such a state, the product of the present invention first slides against the clothes because σ1 is the smallest.

In the model of FIG. 4B, the friction coefficient with respect to the dressing (contact object on the first surface side) of the first surface of the product of the present invention is σ1 (first friction coefficient), the sheets of the second surface of the product of the present invention, etc. ( The friction coefficient with respect to the second surface side contact object) is σ2 (second friction coefficient), and the friction coefficient with respect to the skin of the dressing is σ3. At this time, the relationship of σ2 <σ1 and σ1 <σ3 is derived from the above test results. That is, when a force substantially parallel to the skin acts on the human body in such a state, the product of the present invention first slides against the sheets or the like because σ1 is the smallest.

As described above, Table 4 shows the test results using the skin of a healthy person, and since the local friction displacement mitigation sheet according to the present invention is actually used together with the dressing in the area where the pressure ulcer is occurring, it is actually used. It is considered that the value of σ3 when used for is larger than the value in Table 4.

In the model of FIG. 4C, the friction coefficient of the first surface of the product of the present invention with respect to the skin (contact object on the first surface side) is σ1 (first friction coefficient), and the clothing of the second surface of the product of the present invention (first surface). The friction coefficient with respect to the two-sided contact object) is σ2 (second friction coefficient), and the friction coefficient with respect to clothes sheets and the like is σ4. At this time, the relationship of σ2 <σ1 and σ2 <σ4 is derived from the above test results. That is, when a force substantially parallel to the skin acts on the human body in such a state, the product of the present invention first slides against the clothes because σ1 is the smallest.

In the model of FIG. 4D, the friction coefficient with respect to the skin (contact object on the first surface side) of the first surface of the product of the present invention is σ1 (first friction coefficient), the sheets of the second surface of the product of the present invention, etc. ( The friction coefficient with respect to the second surface side contact object) is defined as σ2 (second friction coefficient). At this time, the relationship σ2 <σ1 is derived from the above test results. That is, when a force substantially parallel to the skin acts on the human body in such a state, the product of the present invention first slides against the sheets or the like because σ1 is the smallest.

As described above, since the second friction coefficient is the smallest in any of the models, the local friction displacement mitigation sheet according to the present invention is slippery with respect to the contact object on the second surface side, and the sliding force is locally generated. It is hard to work.

Next, a test for confirming the relaxation of the displacement by the local friction displacement mitigation sheet 1 according to the present invention is shown below. This test was carried out using the test apparatus shown in FIG. In this test apparatus, a bed sheet made of 100% cotton as a contact target material 102 is laid on the table 100, and the test sample 101 is placed on the bed sheet. Further, the skin model 106 is placed on the test sample 101 with the dressing 107 sandwiched therein, and the jig 103 is placed on the skin model 106. The jig 103 is composed of a plate-shaped lead plate 103a and a weight 103b placed on the plate-shaped lead plate 103a. A wire 104 is horizontally connected to the side end surface of the lead plate 103a. The wire 104 is guided upward by the pulley 105, and its end is connected to a load cell (not shown) or the like to apply a tensile force.

The skin model 106 is made of two-component curable polyurethane and has a substantially rectangular parallelepiped shape with a thickness of 10 mm. In the skin model 106, the cavity 106a is formed at a position 3 mm from the lower end surface thereof. A 3-axis tactile sensor (not shown) is inserted inside the cavity 106a, and it is possible to measure the displacement force inside the skin model 106 and the like. In this test, the above-mentioned SI aid was used as the dressing 107.

The friction coefficient measured using this test device and the displacement force in the skin model 106 are shown below. The test results shown in the table below show the (mean value) ± (standard deviation) of the five measured values. In this table, “without test sample” means that the material 102 to be contacted and the dressing 107 are in contact with each other without using the test sample 101. Further, "adhesion" is a state in which the product of the present invention and the dressing 107 are fixed. Since the test environment of this test is different from that of JIS K7125, the friction coefficient in Table 6 and the friction coefficient in Tables 1 to 5 are different.

From this test result, it can be confirmed that the product of the present invention has an effect of reducing the slipping force inside the skin. In particular, it can be seen that the displacement force is small when the front surface (second surface) of the product of the present invention is set to the contact target material 102 side. That is, when the product of the present invention is used, it is preferable that the side having the smaller friction coefficient is the second surface, that is, the side in contact with clothes, bedding, or the like.

Further, FIG. 6 is a graph showing the time-series change of the frictional force by this test. Comparing the graphs of the front and back surfaces, the same values are shown for the first few seconds, but the frictional force on the back surface increases significantly after about 10 seconds, and finally slips after about 30 seconds. stable.

Next, the case where the product of the present invention and the dressing are adhered and the case where the dressing is not adhered are compared. Comparing the graphs of surface and surface adhesion, the same values are shown after 10 seconds, but when looking around 1 and 2 seconds, the graph of surface adhesion has a peak. Can be seen. The same applies to backside adhesion. From these results, it can be seen that it is important for the product of the present invention to slip against the dressing in order to reduce the frictional force in the initial stage when the force is applied. Therefore, when the product of the present invention is locally applied, it is preferable to apply it so that it is not fixed to the dressing.

Next, the mechanism by which the displacement is mitigated by the local friction slip mitigation sheet 1 according to the present invention will be described. The displacement is caused by the skin being pulled by the frictional force between the clothes and the bedding when the body moves in parallel with the bedding and the like while the load is applied to the skin and the like. This frictional force is the product of the coefficient of friction and the normal force.

Comparing the case where the local friction displacement mitigation sheet 1 is attached to the body and the case where the local friction displacement mitigation sheet 1 is not attached, the normal force is the same in both cases, so the frictional force is determined by the magnitude of the friction coefficient. As described above, in the local friction displacement mitigation sheet 1 according to the present invention, the friction coefficient of the second surface 13a located on the side of clothes, bedding, etc. is low. Therefore, the frictional force between the clothes, bedding, and the like and the local friction slip mitigation sheet 1 becomes small, and the local friction slip mitigation sheet 1 is in a state of sliding on the clothes, bedding, and the like. As a result, the tensile force acting on the skin or the like becomes extremely small, and the displacement can be alleviated. For example, assuming that the friction coefficient of the second surface 13a is 0.24, the tensile force acting on the skin (the tensile force acting on the skin) between the state where the cotton plain weave sheets are in contact with the skin and the state where the local friction displacement mitigation sheet 1 is attached to the skin ( Friction force) can be reduced to 1/4.

Further, in the local friction displacement mitigation sheet 1 in the present embodiment, the friction coefficient of the first surface 12a located on the body side is also small, so that the local friction displacement mitigation sheet 1 itself generates a tensile force parallel to the body surface. Even in this case, the frictional force between the local friction displacement mitigation sheet 1 and the skin or the dressing 3 becomes small. Therefore, the tensile force acting on the skin and the dressing 3 becomes small, and the dressing 3 is less likely to be displaced, twisted, displaced, peeled off from the boiled surface, or the like. As a result, it is possible to suppress an inadvertent adverse effect on the affected area due to displacement of the dressing 3 and to maintain and strengthen the effect of the dressing 3, and it is possible to enhance the effect of treatment for pressure ulcers.

Further, since the friction coefficient for skin clothing, sheets, etc. is considered to be much larger than the first friction coefficient and the second friction coefficient of the local friction displacement mitigation sheet 1, the local area to which the local friction displacement mitigation sheet 1 is attached is attached. A larger frictional force acts on the periphery of the surface, and the frictional force to the local area to which the local friction displacement mitigation sheet 1 is attached becomes smaller. Therefore, the effect of the above-mentioned local friction displacement mitigation sheet 1 itself becomes higher.

FIG. 7A is a photograph of the vicinity of the sacrum where pressure ulcers occur. FIG. 7B is a photograph of the affected area to which the local friction displacement mitigation sheet 1 of the present embodiment is attached so as to cover the affected area while treating the pressure ulcer. From the photograph, it can be seen that by attaching the local friction slip mitigation sheet 1, the slip is alleviated and the pressure ulcer is healing.

As described above, by using the local friction displacement mitigation sheet 1 according to the present invention, it is possible to alleviate the displacement occurring on the skin and the like and suppress the occurrence of pressure ulcers. In addition, even after the occurrence of pressure ulcer, the displacement of the skin is alleviated and the tensile force against the dressing can be alleviated, so that deterioration of the affected area can be prevented and the effect of treatment can be enhanced.

[Another Embodiment]
(1) In the above-described embodiment, the local friction displacement mitigation sheet 1 is composed of the base material 1 and the smoothing layers 12 and 13 formed on both surfaces thereof, but the surface of the base material is the object of the present invention. As long as the friction coefficient reaches a certain level, it may be composed of only the base material.

(2) In the above-described embodiment, the base material 1 is nylon taffeta, the first layer 12 is urethane, and the second layer 13 is silicone resin, but other materials may be used as long as the object of the present invention is achieved. I do not care.

(3) In the above-described embodiment, both the first surface 12a and the second surface 13a have a low friction coefficient, but the friction coefficient of the second surface 13a may be high.

(4) In the above-described embodiment, the index M is displayed on the second surface 13a, but it may be displayed on the first surface 12a or the first surface 12a and the second surface 13a. Further, the display method of the index M can be appropriately changed as long as the first surface 12a and the second surface 13a can be distinguished. In the above-described embodiment, the index M is displayed as a character, but it may be displayed as a graphic, or an index M expressed by a concavo-convex shape that can be recognized by touch can be used.

(5) In the above-described embodiment, since the local friction displacement mitigation sheet 1 is attached to the body by the fixing tape 4, the central portion of the local friction displacement mitigation sheet 1 is not fixed to the body, but pressure ulcers occur. When it is used on a part that has not been used, the entire local friction slip mitigation sheet 1 may be attached to the body by using an adhesive or the like.

In the above-described embodiment, the friction coefficient of the first surface 12a and the friction coefficient of the second surface 13a of the local friction displacement mitigation sheet 1 are different, but they may be the same.

INDUSTRIAL APPLICABILITY The present invention can be used to alleviate the local frictional deviation of a person who spends a lot of time on a bed or a wheelchair, and to prevent pressure ulcers or worsen pressure ulcers.

L: Broken line M: Index 1: Local friction displacement mitigation sheet 11: Base material 12: First layer 12a: First surface 13: Second layer 13a: Second surface 2: Target part 3: Dressing 4: Fixing tape

Claims (3)

A local friction slip mitigation sheet that is attached locally to the body to alleviate friction slips that occur locally.
The first surface, which is located on the side of the body and abuts on the first surface side contact object,
A second surface located on the opposite side of the first surface and in contact with the contact object on the second surface side is provided.
The second surface coefficient of friction relative to the second surface side contact object (which was measured according to the method specified in JIS K7125) is Ri der 0.4 or less,
The friction coefficient of the second surface with respect to the second surface side contact object was measured in accordance with the friction coefficient of the first surface side with respect to the first surface side contact object (method specified in JIS K7125). Smaller than the one)
The first surface side contact object is a dressing affixed locally.
A local friction shift mitigation sheet in which the friction coefficient of the dressing on the first surface is smaller than the friction coefficient of the dressing with respect to the local area. It is a local friction shift mitigation method that alleviates the friction slip that occurs locally in the body.
Comprising the steps of: providing a local friction deviation relaxation sheet according to claim 1 Symbol placement,
A local friction shift mitigation method comprising a step of sticking at least the vicinity of the peripheral edge of the local friction slip mitigation sheet locally so that the first surface faces the body side. The object to be contacted on the first surface side is a dressing.
The local friction slip mitigation method according to claim 2 , wherein in the sticking step, the local friction slip mitigation sheet is locally stuck so that the local friction slip mitigation sheet is not fixed to the dressing.

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