JP4939903B2 - Wound dressing - Google Patents

Description

  The present invention relates to a wound dressing used for covering and healing a skin wound.

  Conventionally, as a method for healing a wound part, a method is known in which a wound dressing material such as gauze is directly applied to the wound part. However, in this method, the wound part and the gauze may stick to each other with blood or body fluid, so when removing the gauze from this wound part, the wound part may be injured, severe pain, There is a risk of bleeding.

  On the other hand, in the wound dressing in which the synthetic resin film sheet having a plurality of holes is attached to the inner surface side that is the side to be brought into contact with the wound part, the gauze and other absorbent members are brought into direct contact with the wound part. Compared to a wound dressing, there is less sticking to the wound part, so there is less risk of damaging the wound part when peeling the wound dressing from the wound part.

  Moreover, in the wound dressing using a synthetic resin film sheet, the surface of this synthetic resin film sheet is smooth, and the friction coefficient between a wound part and a synthetic resin film sheet is small. For this reason, even if the wound dressing moves on the wound part due to the force from the outside, the synthetic resin film sheet moves so as to slide on the wound part, and the synthetic resin film sheet rubs the wound part strongly. Less is.

Therefore, as this type of wound dressing material, a plurality of holes are formed in the synthetic resin film sheet so that the body fluid that exudes from the wound part can be absorbed by the absorbent sheet through a single synthetic resin film sheet. The structure which opened is known (for example, refer patent documents 1 thru | or 3).
Japanese Utility Model Publication No. 57-2018 Japanese Utility Model Publication No. 55-33785 JP-A-2-265547

  However, in the above wound dressing, a part of the body fluid that exudes from the wound part cannot stay in the vicinity of the wound part, so that the wound part is appropriately moistened so that the wound part does not dry. It is not easy to maintain.

  Further, the wound dressing material is a single synthetic resin film sheet. For this reason, depending on conditions, such as the pressure at the time of making a wound part and a wound dressing contact, the blood or body fluid which exudes from a wound part is independent of the opening rate of a plurality of holes of this synthetic resin film sheet. There exists a possibility that it may pass through the holes of the synthetic resin film sheet quickly and be absorbed by the absorbent sheet due to capillary action. Accordingly, there is a possibility that the periphery of the wound portion may be dried, so that it is not easy to reliably maintain the wound portion in a wet state.

  This invention is made | formed in view of the said problem, and provides the wound dressing which can maintain a wound part reliably in a moist state.

The wound dressing of the invention according to claim 1 is disposed between the top sheet positioned on the inner surface side, the back sheet positioned on the outer surface side and having liquid impermeability, and the back sheet and the top sheet. a liquid-absorbent sheet, comprising an intermediate sheet disposed between the liquid-absorbent sheet and said topsheet, each of the topsheet and the intermediate sheet, have a plurality of holes, said surface The sheet and the intermediate sheet are bonded to the outer peripheral edge, which is a portion that does not overlap the liquid absorbent sheet, and the inner portion, which is the portion that overlaps the liquid absorbent sheet, is not bonded, so that the sheet and the intermediate sheet are displaced from each other. It is configured .

  The wound dressing of the invention according to claim 2 is the wound dressing according to claim 1, wherein the surface sheet and the intermediate sheet have an opening ratio of the plurality of holes of 2% or more and 6% or less. Are formed with the same inner diameter.

  The wound dressing of the invention described in claim 3 is the wound dressing described in claim 1 or 2, wherein the intermediate sheet and the liquid-absorbent sheet are bonded.

  A wound dressing according to a fourth aspect of the present invention is the wound dressing according to any one of the first to third aspects, wherein the back sheet is provided with patterns at regular intervals in the two intersecting directions. .

  According to the wound dressing according to claim 1, the intermediate sheet is disposed between the liquid-absorbent sheet and the surface sheet, and each of the intermediate sheet and the surface sheet has a plurality of holes. For example, when the surface sheet side is brought into contact with the wound portion, quick liquid absorption to the liquid absorbent sheet via the surface sheet and the intermediate sheet can be prevented. Furthermore, blood or body fluid that exudes from the wound is temporarily accumulated between the top sheet and the intermediate sheet, and a part of the accumulated blood or body fluid is absorbed through the holes of the intermediate sheet by capillary action. The wound is absorbed into the liquid sheet, and the remainder travels through the holes in the top sheet and accumulates between the wound and the top sheet, so that the wound can be reliably maintained in a wet state.

  According to the wound dressing according to claim 2, the opening ratio of the plurality of holes of the top sheet and the intermediate sheet is 2% or more and 6% or less, and each of the plurality of holes has an equal inner diameter dimension. When the sheet side is brought into contact with the wound part, all the blood or body fluid exuding from the wound part is not absorbed by the liquid absorbent sheet through the holes of the surface sheet and the intermediate sheet. The part can be reliably maintained in a wet state.

  According to the wound dressing of the third aspect, since the intermediate sheet and the liquid-absorbent sheet are bonded, the top sheet and the intermediate sheet are easily displaced. For this reason, for example, even when the intermediate sheet side is displaced when the surface sheet side is brought into contact with the wound part, the surface sheet is less likely to be displaced so as to rub the wound part, so that the burden on the wound part can be reduced. .

  According to the wound dressing according to claim 4, the size of the part where the blood or body fluid absorbed by the liquid absorbent sheet spreads by providing the back sheet with a pattern at regular intervals in two intersecting directions. Is easily compared with the pattern provided on the back sheet, and the amount of blood or body fluid absorbed in the liquid absorbent sheet can be easily confirmed.

  Next, the structure of 1st Embodiment of the wound dressing material of this invention is demonstrated with reference to FIG. 1 and FIG.

  In FIG. 1 and FIG. 2, 1 is a treatment pad as a wound dressing, and this treatment pad 1 is attached in a state where it is in contact with and covered with a wound part such as a cut, an abrasion or a pressure ulcer of a human body. A lap therapy healing pad used to maintain the wound in a moderately moist condition and to heal the wound. And this treatment pad 1 is the intermediate | middle which was laminated | stacked on the surface sheet 2 with the surface sheet 2 located in the inner surface side, and the outer periphery was laminated | stacked on the surface sheet 2 over the circumferential direction by the adhesive sheet 3 And a sheet 4. Further, the treatment pad 1 is disposed on the back surface side of the intermediate sheet 4, and the back surface sheet 5 is disposed on the outer surface side with the outer peripheral edge joined to the intermediate sheet 4 with the adhesive 3 over the circumferential direction. An absorbent sheet 6 is provided as a liquid-absorbent sheet that is disposed between the sheet 5 and the intermediate sheet 4 without being bonded to each other.

  Specifically, the top sheet 2 and the intermediate sheet 4 are configured by, for example, square sheets having the same size in plan view. Furthermore, the surface sheet 2 is disposed on the side to be brought into contact with the wound portion of the human body, for example, and the intermediate sheet 4 is interposed between the surface sheet 2 and the absorbent sheet 6 and disposed. Has been.

  Moreover, the surface sheet 2 and the intermediate sheet 4 have liquid permeability that allows permeation of blood or body fluid that exudes from the wound. Furthermore, it is preferable that the surface sheet 2 and the intermediate sheet 4 are made of a material that has little burden on the wound part even if it is brought into contact with the wound part. That is, as the surface sheet 2 and the intermediate sheet 4, for example, a transparent perforated synthetic resin film sheet made of a polyolefin-based synthetic resin such as a polyethylene resin is preferable. Here, the top sheet 2 and the intermediate sheet 4 do not necessarily need to be formed of sheets of the same material, and the intermediate sheet 4 may be formed in a square shape in plan view that is slightly smaller than the top sheet 2.

  Further, the surface sheet 2 and the intermediate sheet 4 have a thickness of, for example, 5 μm or more and 30 μm or less. That is, when the thickness of the surface sheet 2 and the intermediate sheet 4 is less than 5 μm, the strength may be reduced and it may be broken during use. The thickness of the surface sheet 2 and the intermediate sheet 4 is 30 μm. If it is thicker, the surface sheet 2 and the intermediate sheet 4 themselves become too hard, and the touch becomes worse.

  The top sheet 2 and the intermediate sheet 4 are formed with a plurality of holes 7 and 8 at equal intervals in the longitudinal direction A and the lateral direction B of the top sheet 2 and the intermediate sheet 4, respectively. The plurality of holes 7 and 8 penetrate in the thickness direction C of the top sheet 2 and the intermediate sheet 4 and are formed in the same size. The plurality of holes 7 and 8 are formed in the top sheet 2 or the intermediate sheet 4 so that the opening ratio of the plurality of holes 7 and 8 is, for example, 2% or more and 6% or less.

  Further, each of the plurality of holes 7 and 8 is preferably formed to have an inner diameter of 0.4 mm or more and 1.0 mm or less, that is, a hole diameter. That is, when the hole diameters of these holes 7 and 8 are smaller than 0.4 mm, when the blood or body fluid exuding from the wound is highly viscous, the passage of the holes 7 and 8 by these blood or body fluids is extremely difficult. May be late. On the other hand, when the hole diameters of these holes 7 and 8 are larger than 1.0 mm, blood or body fluid quickly passes through these holes 7 and 8, and the space between the top sheet 2 or intermediate sheet 4 and the wound part is moderate. There is a possibility that it cannot be kept in a wet state.

  Further, the top sheet 2 and the intermediate sheet 4 are laminated in such a manner that the holes 7 formed in the top sheet 2 and the holes 8 formed in the intermediate sheet 4 overlap and do not communicate with each other. However, when the distance between the holes 7 and 8 formed in the surface sheet 2 and the intermediate sheet 4 is narrow, for example, the aperture ratio of each hole 7 and 8 is 6% and the hole diameter of each hole 7 and 8 is 0.4 mm. When the holes 7 and 8 are evenly provided on the entire surface sheet 2 and the intermediate sheet 4 and the distance between the holes 7 and 8 is 1 mm, any of the holes 7 and 8 may overlap and communicate with each other. High nature. In this case, it is preferable to laminate the top sheet 2 and the intermediate sheet 4 so that the overlapping degree of the holes 7 and 8 is minimized.

  Furthermore, the outer peripheral edge part which is the outer part which does not overlap with the absorptive sheet 6 among these surface sheets 2 and the intermediate sheet 4 is bonded to the surface sheet 2 and the intermediate sheet 4 with the adhesive 3. Moreover, the inner side part which is a part which overlaps with the absorbent sheet 6 among these surface sheets 2 and the intermediate | middle sheet | seats 4 is not adhere | attached but is comprised so that it may mutually shift.

  Here, the holes 7 and 8 formed in the surface sheet 2 and the intermediate sheet 4 are located at positions facing the absorbent sheet 6 in the surface sheet 2 and the intermediate sheet 4, that is, in the absorbent sheet 6. It suffices if it is formed only at the contact position. However, in consideration of the productivity of the surface sheet 2 and the intermediate sheet 4, specifically, continuous productivity, a sheet in which a plurality of holes 7 and 8 are formed on the entire surface of the surface sheet 2 and the intermediate sheet 4 is preferable. .

  Next, the back sheet 5 is a square sheet in plan view having substantially the same size as that of the top sheet 2 and has water repellency or liquid impermeability through which liquid such as blood or body fluid cannot permeate. Specifically, the back sheet 5 is preferably made of a polyolefin-based synthetic resin such as a polyethylene resin. Further, as the back sheet 5, the size D of blood or body fluid that has penetrated into the absorbent sheet 6 to be absorbed and spread can be seen through from the outside of the back sheet 5, and this absorbent sheet In order to prevent the blood or body fluid that has penetrated into 6 and absorbed and spread from being clearly visible, a translucent material of, for example, about 30 μm to 100 μm is preferable.

  Here, as the back surface sheet 5, a sheet obtained by laminating and bonding a non-illustrated non-woven sheet made of a non-woven fabric on the surface side of a non-illustrated synthetic resin sheet made of a synthetic resin can also be used. . The back sheet 5 is preferably bonded to an absorbent sheet 6 disposed in contact with the back sheet 5.

  Further, the absorbent sheet 6 is disposed without being bonded to the intermediate sheet 4, and is laminated between at least one liquid diffusion sheet 11, 12, for example, and these liquid diffusion sheets 11, 12. The liquid holding sheet 13 is provided. The liquid diffusion sheets 11 and 12 and the liquid holding sheet 13 have a liquid absorbing property that can absorb liquids such as blood and body fluid, for example, and are longer in the vertical direction A and the horizontal direction B than the intermediate sheet 4 and the back sheet 5. Each is formed in a small square shape in plan view, and is disposed in a region where the outer periphery is bonded by the adhesive 3 between the intermediate sheet 4 and the back sheet 5.

  Specifically, the liquid diffusion sheet 12 located on the surface side diffuses while absorbing blood, body fluid, and the like that have exuded from the wound portion and passed through the holes 7 and 8 of the surface sheet 2 and the intermediate sheet 4. Further, the liquid diffusion sheet 12 is intermittently adhered and fixed with an adhesive 3 at a predetermined interval to the outer surface located outside the intermediate sheet 4 facing the liquid diffusion sheet 12. Yes. Next, the liquid holding sheet 13 absorbs and holds blood, body fluid, and the like that have exuded from the wound portion, passed through the holes 7 and 8 of the surface sheet 2 and the intermediate sheet 4, and diffused by the liquid diffusion sheet 12. Further, the liquid diffusion sheet 11 located on the back surface side diffuses while absorbing blood and body fluid leaked from the liquid holding sheet 13.

  In addition, as this absorptive sheet 6, the sheet | seat formed with the woven fabric, the nonwoven fabric, or the absorbent cotton, the sheet | seat which interposed the super absorbent polymer particle between two water absorbent papers, It is also possible to use a sheet processed into a sheet after the resin particles are mixed with the pulverized pulp. These sheets can be appropriately selected and used by laminating one or a plurality of sheets.

  Further, between the outer edge portion of the absorbent sheet 6 and the portion of the intermediate sheet 4 and the back sheet 5 bonded by the adhesive 3, as shown in FIG. 2, the intermediate sheet 4 and the back sheet 5 and the absorbent sheet 6 are formed with a space portion 14 that allows a shift in the plane direction, which is the horizontal direction. However, in order to make it difficult for the absorbent sheet 6 to shift between the intermediate sheet 4 and the back sheet 5, it is preferable not to form the space portion 14.

  Next, the operation of the wound dressing according to the first embodiment will be described.

  First, the inner surface side of the surface sheet 2 of the treatment pad 1 is brought into contact with a wound portion of a human body and fixed with, for example, a medical tape (not shown).

  When blood or body fluid exudes from the wounded part of the human body, a part of the blood or body fluid passes through the plurality of holes 7 formed in the surface sheet 2 and It accumulates temporarily with the intermediate sheet 4.

  Further, the blood or body fluid temporarily accumulated between the surface sheet 2 and the intermediate sheet 4 passes through the holes 8 formed in the intermediate sheet 4 by the action of capillary action of the blood or body fluid. Thus, the liquid diffusion sheet 12 is absorbed and diffused.

  In addition, the remaining blood or body fluid temporarily accumulated between the top sheet 2 and the intermediate sheet 4 passes through the holes 7 formed in the top sheet 2, and then goes back and forth between the holes 7. A slight amount of blood or body fluid that can maintain the wound in a certain moist state is accumulated and held between the wound and the surface sheet 2.

  And between the surface sheet 2 and the wound part is maintained in an appropriate wet state suitable for healing of the wound part by the blood or body fluid accumulated and held between the wound part and the surface sheet 2. This moderately moist state is maintained.

  Further, the blood or body fluid that has passed through the hole 8 of the intermediate sheet 4 and has been diffused by the liquid diffusion sheet 12 is absorbed and held by the liquid holding sheet 13. Further, blood and body fluid leaked from the liquid holding sheet 13 are diffused while being absorbed by the liquid diffusion sheet 11.

  As a result, blood or body fluid that exudes from a wound part of the human body is absorbed while being appropriately held by the treatment pad 1, and the wound part is held in a moist state suitable for healing. The wet state of the wounded part is maintained while being maintained in an appropriate state, and the wounded part is healed.

  Here, the larger the plurality of holes 7 formed in the surface sheet 2 of the healing pad 1, the greater the amount of absorption of the absorbent sheet 6 by allowing blood or body fluid that exudes from the wound part of the human body to pass therethrough, and the wound part Body fluids and blood are less likely to remain around. However, in order to heal a wounded part of the human body, it is good to always keep this wounded part in a moderately moist state, so that a part of the blood or body fluid that has exuded around the wounded part is retained and this wounded part is retained. It is desirable to maintain a state where the material does not dry.

  Therefore, as described above, the intermediate sheet 4 is disposed between the absorbent sheet 6 and the top sheet 2 of the treatment pad 1, and a plurality of holes 7 and 8 are provided in each of the intermediate sheet 4 and the top sheet 2. The opening ratio of the intermediate sheet 4 and the top sheet 2 by these holes 7 and 8 was set to 2% or more and 6% or less. As a result, when the surface sheet 2 side of the treatment pad 1 is brought into contact with the wound portion, blood or body fluid oozing out from the wound portion is applied to the absorbent sheet 6 via the surface sheet 2 and the intermediate sheet 4. Quick absorption can be prevented.

  Furthermore, a part of the blood or body fluid that exudes from the wound part temporarily accumulates between the top sheet 2 and the intermediate sheet 4. A part of the blood or body fluid accumulated between the surface sheet 2 and the intermediate sheet 4 is absorbed into the absorbent sheet 6 through the holes 8 of the intermediate sheet 4 by capillary action, and the remainder is the surface sheet. It moves back and forth through the two holes 7 and accumulates between the wound portion and the top sheet 2. Accordingly, since a small amount of blood or body fluid necessary for maintaining the wet state of the wound portion can be kept around the wound portion, the vicinity of the wound portion can be reliably maintained in an appropriate wet state.

  Further, the opening ratio of the plurality of holes 7 and 8 in each of the top sheet 2 and the intermediate sheet 4 is set to 2% or more and 6% or less, and each of the plurality of holes 7 and 8 has the same hole diameter. When the surface sheet 2 side is brought into contact with the wound part, all blood or body fluid exuding from the wound part is absorbed into the absorbent sheet 6 through the holes 7 and 8 of the surface sheet 2 and the intermediate sheet 4. Since it cannot be absorbed, the wound can be reliably maintained in a wet state.

  Further, since the intermediate sheet 4 and the liquid diffusion sheet 12 of the absorbent sheet 6 are intermittently adhered with the adhesive 3, the intermediate sheet 4 is fixed to the absorbent sheet 6. It becomes easy to slip on the intermediate sheet 4, and the intermediate sheet 4 is easily displaced in the horizontal direction with respect to the top sheet 2. Therefore, even if the treatment pad 1 itself is displaced and the intermediate sheet 4 side of the treatment pad 1 is displaced in a state where the surface sheet 2 side of the treatment pad 1 is in contact with the wound portion, the treatment pad 1 is in contact with the wound portion. It is less likely that the top surface sheet 2 is displaced so as to rub the wound portion. Therefore, since the rubbing between the topsheet 2 and the wound part due to the movement of the treatment pad 1 can be prevented, the burden on the wound part can be reduced.

  Therefore, the treatment pad 1 is effective for treating pressure ulcers (bed sores). That is, when the treatment pad 1 is attached to and treated with the pressure ulcer part of the human body, the treatment pad 1 may be displaced when changing the tilt of the bed. Because the friction coefficient between them is relatively small, it is difficult to place a burden on the pressure ulcer part.

  Next, as in the second embodiment shown in FIG. 3 and FIG. 4, the two directions intersecting the surface as the outer surface located outside the back sheet 5 of the treatment pad 1, specifically, the vertical direction orthogonal to each other. A lattice pattern 21 can also be applied by drawing straight lines E at regular intervals in the A and lateral directions B, respectively. In this case, the straight line E constituting the lattice pattern 21 is provided along either the longitudinal direction A or the lateral direction B of the surface of the back sheet 5. Further, the lattice pattern 21 is provided on the entire surface of the back sheet 5.

  Further, as shown in FIG. 4, the back surface sheet 5 allows the blood D or the size D of the blood or body fluid that has penetrated and absorbed the absorbent sheet 6 to be spread from the outside of the back surface sheet 5. Further, it is formed of a sheet having a white or light color tone. Here, as this back surface sheet 5, the laminated sheet which laminated | stacked and combined the nonwoven fabric sheet on this synthetic resin film sheet only with the single layer of only the synthetic resin film sheet which has liquid-imperviousness, etc. may be sufficient.

  As a result, by forming the lattice pattern 21 on the surface of the back sheet 5 of the treatment pad 1, as shown in FIG. 4, the blood or body fluid absorbed and held by the absorbent sheet 6 of the treatment pad 1 is obtained. By comparing the size D with the lattice pattern 21 of the back sheet 5 and observing the change in the size D of the blood or body fluid held in the absorbent sheet 6, the blood or Since the amount of fluid absorbed can be easily confirmed, the degree and state of healing of the wound can be indirectly grasped.

  Further, the size D of the blood or body fluid absorbed and held by the absorbent sheet 6 of the treatment pad 1 is compared with the lattice pattern 21 of the back sheet 5, and the size D of the blood or body fluid is the lattice pattern 21. The grid pattern 21 can be used as a guideline for determining the replacement timing of the treatment pad 1 if the doctor or nurse decides in advance that it will be replaced with a new treatment pad 1 when the number of portions increases. Therefore, the replacement time of the treatment pad 1 does not depend on the judgment of the doctor or the nurse, and it is not necessary to specifically tell the replacement state of the treatment pad 1 when the nurse is changed.

  Furthermore, since the size D of the spread of the blood or body fluid absorbed and held by the absorbent sheet 6 of the treatment pad 1 can be measured by the number of grid patterns 21 of the back sheet 5, this absorption is possible. The size D of the spread part of the blood or body fluid held by the adhesive sheet 6 can be confirmed easily and accurately. Therefore, the size D of the spread portion of the blood or body fluid held by the absorbent sheet 6 can be recorded specifically, and the amount of blood or body fluid held by the absorbent sheet 6 can be further increased. It can be confirmed easily and accurately.

  In addition, instead of the lattice pattern 21 provided on the surface of the back sheet 5 of the treatment pad 1, points are formed on the surface of the back sheet 5 at regular intervals, that is, equally spaced in the vertical direction A and the horizontal direction B, respectively. A dot pattern (not shown) configured as described above or a plus pattern at equal intervals toward each of the vertical direction A and the horizontal direction B may be configured as a cross pattern. In this case, each point of these dot patterns and each + pattern of the cross pattern can be dealt with by arranging them at each intersection of the lattice pattern 21. Further, the lattice pattern 21, the dot pattern, and the cross pattern may be formed on any sheet other than the back sheet 5 as long as it can be seen from the outside of the back sheet 5.

  In addition, a part of the top sheet 2 and the intermediate sheet 4 of the treatment pad 1 can be intermittently bonded using the adhesive 3 or the like. In this case, it does not overlap with the holes 7 and 8 formed in the surface sheet 2 and the intermediate sheet 4 and does not obstruct the flow of blood or body fluid through the holes 7 and 8 in the surface sheet 2 and the intermediate sheet 4. In addition, each of the positions separated from each other in the longitudinal direction A and the lateral direction B of the surface sheet 2 and the intermediate sheet 4 is partially joined by the adhesive 3.

  Next, the liquid absorption test of the wound dressing according to the first embodiment will be described.

<Test method>
First, 10 g of physiological saline was included in a sponge (not shown) having a vertical dimension of 60 mm × horizontal dimension: 50 mm × thickness dimension: about 5 mm.

  Next, after the treatment pad 1 was placed on the sponge, a load of 500 g was applied on the treatment pad 1, and this state was allowed to stand for 60 minutes.

  Thereafter, the weight of the physiological saline remaining in the sponge was measured, and the residual liquid ratio (%) of the physiological saline remaining in the sponge without being absorbed by the treatment pad 1 was calculated.

  At this time, as the top sheet 2, intermediate sheet 4 and back sheet 5 of the treatment pad 1, a synthetic resin film sheet having a size of about 180 mm × 180 mm × thickness: 20 μm was used. Furthermore, in each of the top sheet 2 and the intermediate sheet 4, holes having a hole diameter of 0.4 mm were formed at equal intervals in the vertical direction and the horizontal direction.

  Moreover, as the absorbent sheet 6 of the treatment pad 1, liquid diffusion sheets 11 and 12 composed of a rayon nonwoven fabric having a size of about 140 mm × width: 140 mm × thickness: 20 μm are used, A liquid holding sheet 13 composed of an SAP sheet (Super Absorbent Polymer Sheet) having a vertical dimension of 140 mm × horizontal dimension: 140 mm × thickness dimension: about 20 μm was used.

<Examples 1 to 5>
First, as the top sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Example 1, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 6% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 10%, it turned out that a wound part can be hold | maintained in a moderate moist state with this treatment pad 1. It was.

  Next, as the surface sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Example 2, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 5% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 24%, it turns out that a wound part can be hold | maintained in a moderate moist state with this treatment pad 1. It was.

  Further, as the surface sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Example 3, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 4% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 42%, it turned out that a wound part can be hold | maintained in a moderate moist state with this treatment pad 1. It was.

  Further, as the surface sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Example 4, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 3% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 56%, it turned out that a wound part can be hold | maintained in a moderate moist state with this treatment pad 1. It was.

  Next, as the surface sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Example 5, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 2% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 75%, it turned out that a wound part can be hold | maintained in a moderate moist state with this treatment pad 1. It was.

  As a result, in each of the treatment pads 1 using the top sheet 2 and the intermediate sheet 4 having an opening ratio of 2% or more and 6% or less in Examples 1 to 5, a part of physiological saline could remain in the sponge. . Therefore, a part of the blood or body fluid that exudes from the wound part remains in the vicinity of the wound part with which the treatment pad 1 is abutted, and is maintained and maintained in a moist state suitable for healing of the wound part. Since it was possible, evaluation was set as (circle).

<Comparative Example 1>
As the surface sheet 2 of the treatment pad 1 of Comparative Example 1, the above synthetic resin film sheet having a plurality of holes 7 having a hole diameter of 0.4 mm and an aperture ratio of 6% is used and omitted without providing the intermediate sheet 4. The treatment pad 1 using a single perforated resin film sheet was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 1% or less, a wound part cannot be kept in a moderate moist state by this treatment pad 1. I understood.

  Therefore, in the treatment pad 1 in which the opening sheet of the comparative example 1 is 6% and the intermediate sheet 4 is omitted, that is, the treatment pad 1 having a single perforated synthetic resin film sheet, the physiological saline in the sponge is used. As a result, the sponge was almost dried. As a result, a part of the physiological saline could not be left in the sponge, and thus the evaluation was x.

<Comparative example 2>
As the top sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Comparative Example 2, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 7% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 1% or less, a wound part cannot be kept in a moderate moist state by this treatment pad 1. I understood.

  Therefore, in the treatment pad 1 using the top sheet 2 and the intermediate sheet 4 having an opening ratio of 7% in Comparative Example 2, almost all of the physiological saline in the sponge was absorbed, and the sponge was almost dried. As a result, a part of the physiological saline could not be left in the sponge, and thus the evaluation was x.

<Comparative Example 3>
As the surface sheet 2 and the intermediate sheet 4 of the treatment pad 1 of Comparative Example 3, the above synthetic resin film sheet having a plurality of holes 7 and 8 having a hole diameter of 0.4 mm and an opening ratio of 1% was used. And when the said test was done using this treatment pad 1, since the residual liquid rate which remained in the said sponge became 98%, it cannot maintain a wound part in a moderate moist state with this treatment pad 1. I understood.

  That is, in the treatment pad 1 using the top sheet 2 and the intermediate sheet 4 having an opening ratio of 1% in Comparative Example 3, only 2% of the physiological saline in the sponge can be absorbed. Remained in the sponge. As a result, there is a possibility that the original purpose of the treatment pad 1 of absorbing or removing blood or body fluid exuding from the wound portion may not be achieved.

  From the above results, the wound area where the surface sheet 2 is brought into contact with each other by setting the opening ratio of the plurality of holes 7 and 8 of the surface sheet 2 and the intermediate sheet 4 of the treatment pad 1 to 2% or more and 6% or less. A part of the blood or body fluid exuding from the surface sheet 2 and the intermediate sheet 4 can be temporarily stored, and the blood or body fluid stored between the surface sheet 2 and the intermediate sheet 4 can be It becomes possible to come and go between the top sheet 2. Accordingly, a part of the blood or body fluid can be kept between the topsheet 2 and the wound part, and the wound part can be reliably maintained in an appropriate moist state suitable for healing. It was found that healing of the wounded part can be performed more efficiently.

It is a top view of the state which expanded a part of wound dressing material which shows the 1st Embodiment of this invention. It is sectional drawing of the wound dressing material of this invention shown in FIG. It is a top view of the wound dressing which shows the 2nd Embodiment of this invention. It is a top view which shows the state which absorbed the bodily fluid with the wound dressing material of this invention shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Treatment pad as wound dressing material 2 Top sheet 4 Intermediate sheet 5 Back sheet 6 Absorbent sheet as liquid absorbent sheet 7,8 Hole
21 Lattice pattern as pattern

Claims (4)

A surface sheet located on the inner surface side;
A back sheet located on the outer surface side and having liquid impermeability;
A liquid absorbent sheet disposed between the back sheet and the top sheet;
An intermediate sheet disposed between the liquid absorbent sheet and the top sheet,
Each of the topsheet and the intermediate sheet, have a plurality of holes,
The top sheet and the intermediate sheet are bonded to each other at an outer peripheral edge portion that does not overlap the liquid absorbent sheet, and an inner portion that is a portion that overlaps the liquid absorbent sheet is not bonded to each other. A wound dressing characterized by being configured to move . The surface sheet and the intermediate sheet have an opening ratio of the plurality of holes of 2% or more and 6% or less,
The wound dressing according to claim 1, wherein each of the plurality of holes has an equal inner diameter. The wound dressing according to claim 1 or 2, wherein the intermediate sheet and the liquid-absorbent sheet are bonded. The wound dressing according to any one of claims 1 to 3, wherein the back sheet is provided with patterns at regular intervals in two intersecting directions.

Images