WO2013129344A1 - Wound covering material - Google Patents

Wound covering material Download PDF

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Publication number
WO2013129344A1
WO2013129344A1 PCT/JP2013/054831 JP2013054831W WO2013129344A1 WO 2013129344 A1 WO2013129344 A1 WO 2013129344A1 JP 2013054831 W JP2013054831 W JP 2013054831W WO 2013129344 A1 WO2013129344 A1 WO 2013129344A1
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Prior art keywords
wound
layer
covering
opening
dressing material
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PCT/JP2013/054831
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French (fr)
Japanese (ja)
Inventor
柴田　彰
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ユニ・チャーム株式会社
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Publication of WO2013129344A1 publication Critical patent/WO2013129344A1/en

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    • A61F13/01029—
    • A61F13/01034—

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  • the present invention relates to a wound covering material used for covering and treating a wound.
  • Patent Document 1 discloses a wound covering material for absorbing and retaining exudate.
  • This wound covering material has hydrophobicity, the air permeability of JISL1096 is 20 to 2000 cm 3 / cm 2 ⁇ s, and the water repellency of JISL1092 is 3 points or more, so that the function of initial water pressure resistance is achieved.
  • And includes a first layer including a porous sheet facing the wound surface and a second layer that functions to absorb exudate that has exuded from the wound site and permeated through the first layer. .
  • the exudate from the wound part was appropriately held in the wound part covering material, and thereby covered with the wound part covering material.
  • the wound area is properly moist.
  • the wound part is unnecessarily pressed by the exudate being appropriately discharged from the wound part.
  • the wound part covering material adheres to the wound part or is rubbed against the wound part so that the wound part covering material itself does not cause deterioration of the wound.
  • wound dressing material needs to cover the wound portion and provide a predetermined wet state.
  • it is difficult to produce such a wet state and thus there is a problem in terms of wound treatment effect.
  • an object of the present invention is to provide a wound covering technique that contributes to improving the covering effect of a wound.
  • covering material which has a liquid-permeable 1st layer and the liquid-absorbing 2nd layer accumulated on the said 1st layer is comprised.
  • Liquid permeability in the first layer includes both an aspect in which the first layer permeates all of the liquid (typically exudate from the wound part) and a part of the aspect.
  • Liquid absorbency in the second layer refers to a state in which the second layer absorbs and holds the liquid (typically exudate from the wound), and absorbs and holds all of the liquid. Embodiments include both embodiments and partially absorbing and retaining embodiments.
  • the “wound” in the present invention includes various cases such as burns, pressure sores, contusions, abrasions, or ulcers.
  • the first layer and the second layer include both a mode in which they are directly stacked and a mode in which they are stacked in a state in which an intervening layer is provided between them.
  • the intervening layer is constituted by a liquid-absorbing layer, so that the second layer and the liquid-absorbing / holding can cooperate with each other.
  • both the aspect which comprises an intervening layer by a single layer, and the aspect comprised by multiple layers are included.
  • the first layer in the present invention is constituted by a porous sheet in which a plurality of holes are formed.
  • the porous sheet which comprises a 1st layer has the wound part coating
  • the plurality of holes may be formed in the first layer so as to correspond to at least the wound portion covering region, but may be formed over the entire surface of the first layer.
  • the second layer in the present invention is formed on the opposite side of the first layer facing surface facing the first layer and the first layer facing surface, and the wound portion covering material is disposed between the wound portion and the wound portion.
  • a secondary dressing material facing surface capable of contacting the secondary dressing material to be received.
  • the secondary dressing material for example, diapers, gauze, bandages, etc. are used as appropriate.
  • a wound part covering material mounting surface is formed on the secondary dressing material.
  • the static friction coefficient with respect to the secondary dressing material of a secondary dressing material opposing surface is set smaller than the static friction coefficient with respect to the wound part of a wound part coating surface.
  • a wound covering material is constructed which is characterized in that
  • the present invention maintains the wound covering state by causing a relative movement between the wound covering material and the secondary dressing material when an external force is applied to the wound covering material, and thus the wound portion. It is particularly suitable for use as a pressure ulcer sheet because it relates to a technique for suppressing adverse effects on the wound due to rubbing of the covering material.
  • each of the plurality of holes in the porous sheet has a first opening formed in the wound covering surface and a second opening formed in the second layer facing surface. Configured.
  • the opening facing the wound covering surface corresponds to the first opening
  • the opening facing the second layer facing surface corresponds to the second opening.
  • the opening ratio of the 1st opening part which occupies for a wound part covering surface is set larger than the opening ratio of the 2nd opening part which occupies for the 2nd layer side opposing surface.
  • the opening ratio in each surface is defined by the area ratio of the opening to the entire surface. That is, the opening ratio of the first opening is larger than the opening ratio of the second opening.
  • the ratio of the total area of the first opening of each hole to the area (effective area) of the wound covering surface is the second layer. It means that it is set to be larger than the ratio of the total area of the second openings of each hole to the area (effective area) of the side facing surface.
  • the liquid By comprising in this way, about the liquid (typically exudate) from a wound part, while making it easy to take in a wound part covering material through a 1st opening part, the liquid once taken in absorbs or hold
  • the ratio which a wound part coating surface directly contacts a wound part can be made relatively small by setting the opening ratio by the 1st opening part in a wound part coating surface relatively large. This makes it possible to effectively prevent the wound covering surface from sticking to the wound and aggravating the symptoms of the wound, and dealing with a wide range of symptoms from mild to severe. It becomes possible.
  • the 1st layer in the said wound dressing is interposed between a 2nd layer and a wound part, while avoiding that a 2nd layer hits the said wound part directly, a wound
  • an external force is applied to the part covering material, it is configured such that relative movement occurs between the second layer and the secondary dressing material while maintaining the contact state between the first layer and the wound part. Is preferred.
  • the sliding operation between the wound part covering surface and the wound part is suppressed, and even when an external force is applied to the wound part covering material, it is possible to suppress the wound part from being adversely affected by rubbing. .
  • the first layer and the second layer are preferably joined to each other by welding or an adhesive.
  • the first layer and the second layer are formed by hot-melt fibers or partially mixed with hot-melt fibers, and the hot-melt fibers are heat-welded to form the first layer and the second layer.
  • An embodiment in which the layers are welded is preferred.
  • prescribed opening ratio with respect to a wound part covering surface can maintain the liquid absorption amount of the exudate from the wound part in a 2nd layer at a predetermined amount.
  • the second opening portion having a predetermined opening ratio with respect to the second layer side facing surface maintains a predetermined amount of leakage of exudate held in the second layer to the wound portion side.
  • each of the plurality of holes is preferably formed such that the effective step area decreases sequentially from the first opening toward the second opening.
  • each of the plurality of holes is preferably formed in a substantially conical shape having the first opening and the second opening as the bottom surface and the top surface, respectively.
  • Forming in a conical shape means that each of a plurality of holes forms an inverted cone shape (conical shape) when the wound covering material is observed from the side surface. Promotion of liquid absorption and suppression of liquid leakage from the second layer can be realized more reliably.
  • the first layer has a ratio of leaking to the wound covering surface side, assuming that the exudate absorbed by the second layer is, for example, a case where beef is used in the wound part. It is preferable to set it to be within 5 percent. Thereby, it can suppress that a wound part wets excessively.
  • 5 milliliters of a 0.9 percent sodium chloride solution is supplied to the second layer through the wound covering surface of the first layer and a load of 5 grams per square centimeter is applied to the wound covering surface.
  • the amount of leakage when acting for a minute is preferably suppressed within a range of approximately 0 to 0.1 grams. Thereby, it can suppress that a wound part wets excessively.
  • the opening ratio of the first opening occupying the wound surface is set to about 50 to 95 percent, preferably about 50 to 90 percent.
  • the opening ratio of the first opening is set to about 50 to 95 percent, preferably about 50 to 90 percent.
  • the opening ratio of the first opening occupying the wound covering surface is set to about 75 to 95 percent, preferably about 80 to 95 percent. This makes it possible to ultimately ensure the wettability of the wound part and reduce the contact area with the wound part.
  • the opening ratio of the second opening occupying the second layer side facing surface is set to approximately 3 to 50 percent.
  • the opening ratio of the second opening occupying the second layer side facing surface is set to approximately 3 to 20 percent, preferably approximately 3 to 20 percent. This makes it possible to ultimately reduce the amount of leakage of the liquid absorbed and held in the second layer to the wound part.
  • the apparent thickness of the first layer is set to about 0.1 to 1.2 mm from the viewpoints of healing performance, wet state maintenance, and liquid return properties. More preferably, it is more preferably set to about 0.3 to 1.2.
  • the ventilation resistance value from the wound layer covering surface of the first layer to the side surface opposite to the first layer in the second layer is set to be 0.1 Ks ⁇ s / m or less. It is preferable. By keeping the ventilation resistance value relatively low, it is possible to effectively prevent the wounded part from becoming too steamy and adversely affecting healing.
  • FIG. 3 is a schematic cross-sectional view showing a detailed configuration of a wound part covering sheet 101 according to Example 1.
  • FIG. 3 is a schematic cross-sectional view showing a detailed configuration of a wound part covering sheet 101 according to Example 1.
  • FIG. It is typical sectional drawing which shows one embodiment of the performance evaluation of the wound part coating sheet 101 which concerns on Example 1.
  • FIG. It is typical sectional drawing which shows one embodiment of the performance evaluation of the wound part coating sheet 101 which concerns on Example 1.
  • FIG. It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1.
  • FIG. It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1.
  • FIG. It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1.
  • FIG. It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1.
  • the structure of the wound part covering sheet 101 according to Example 1 of the present invention is schematically shown in FIGS.
  • the wound portion covering sheet 101 is formed integrally with a first layer 110 formed in a sheet shape and a second layer 120 similarly formed in a sheet shape by spray hot-melt surface bonding to each other. . Both may be joined by heat welding.
  • seat 101 is one implementation structural example corresponding to the "wound part coating
  • the first layer 110 and the second layer 120 are one implementation configuration example corresponding to the “first layer” and the “second layer” in the present invention.
  • the first layer 110 is a liquid-permeable porous sheet 110a that is in contact with the wound part 2 or the skin surface 1 shown in FIG. 3 (showing the contact state with the wound part 2 in FIG. 3), and has a predetermined water pressure resistance. In other words, it has a predetermined air permeability and water repellency, and is suitably constituted by, for example, a perforet film.
  • This liquid-permeable porous sheet 110a is one embodiment configuration example corresponding to the “porous sheet” in the present invention.
  • a material for forming the first layer in addition to the film, for example, a nonwoven fabric made of a thermoplastic polymer can be used.
  • the first layer 110 is attached to the skin surface 1 so as to face the wound portion 2 shown in FIG. 3 and the wound portion covering surface 111 for covering the wound portion 2 and the second layer 120 facing the second layer 120.
  • a two-layer facing surface 112 is provided.
  • the wound portion covering surface 111 and the second layer facing surface 112 are one implementation configuration example corresponding to the “wound portion covering surface” and the “second layer facing surface” of the present invention, respectively.
  • the porous sheet 110a forming the first layer 110 has a plurality of holes 113 penetrating between the wound portion covering surface 111 and the second layer body construction surface 112. This hole 113 is one implementation configuration example corresponding to the “hole” of the present invention.
  • Each of the plurality of holes 113 has a first opening 114 that opens to the wound covering surface 111 and a second opening 115 that opens to the second layer body construction surface 112.
  • the 1st opening part 114 and the 2nd opening part 115 are one implementation structural example corresponding to the "1st opening part” and the “2nd opening part” of this invention, respectively.
  • the ratio of the total area of the first openings 114 formed in large numbers on the wound covering surface 111 to the total area of the wound covering surface 111, that is, the opening ratio of the first opening 114 is the second layer side facing surface 112 is set such that the total area of the second openings 115 formed in large numbers on the area 112 occupies the total area of the second layer side facing surface 112, that is, the opening ratio of the second openings 115. .
  • the specific values of the opening ratios of both will be described in detail in the following performance evaluation items.
  • the second layer 120 shown in FIGS. 1 to 3 is preferably composed of a liquid-absorbing air laid nonwoven fabric or an air-through nonwoven fabric.
  • the 2nd layer 120 has the 1st layer opposing surface 121 which goes to the 1st layer 110, and the secondary dressing opposing surface 122 which goes to the diaper 130 shown in FIG.
  • the second layer 120, the first layer facing surface 121, and the secondary dressing material facing surface 122 are each one of the “second layer”, “first layer facing surface”, and “secondary dressing material facing surface” in the present invention. It is an implementation structural example.
  • thermo welding by heat sealing is used, but in addition, adhesion using a hot melt adhesive or the like, polymerization by embossing, etc. Is possible.
  • the wound portion covering sheet 101 according to the first embodiment is applied to the wound portion 2 on the skin surface 1 of the patient after being placed on the diaper 130.
  • a wound part covering sheet placement surface 131 is formed on the diaper 130, and the wound part covering sheet 101 is placed on and integrated with the wound part covering sheet placement surface 131 (FIG. 3).
  • the two are shown apart from each other).
  • the diaper 130 and the wound part covering sheet placement surface 131 are one implementation configuration example corresponding to the “secondary dressing material” and the “wound part covering material placement surface” in the present invention, respectively.
  • the static friction coefficient of the wound portion covering surface 111 with respect to the wound portion is reduced by setting the opening ratio of the first opening 114 in the wound portion covering surface 111 to be large. Furthermore, the static friction coefficient with respect to the diaper 130 of the secondary dressing material facing surface 122 is set to be a relatively smaller value than the static friction coefficient with respect to the wound portion of the wound covering surface 111.
  • the wound part covering sheet 101 is configured as described above.
  • the opening ratio of the first opening 114 occupying the total area of the wound part covering surface 111 is the opening ratio of the second opening 115 occupying the total area of the second layer side facing surface 112. Is set larger than.
  • the liquid (typically exudate) from the wound part 2 is easily taken into the wound part covering sheet 101 through the first opening 114, and the liquid once taken in absorbs or holds the liquid. It is possible to suppress leakage from the two layers 120 to the wound part 2 side through the second opening 115 and the first opening 114. Thereby, the appropriate wet state in the wound part 2 covered with the wound part covering sheet 101 can be maintained.
  • the ratio in which the wound part covering surface 111 directly contacts the wound part 2 can be relatively reduced by setting the opening ratio of the first opening 114 in the wound covering surface 111 to be relatively large. Therefore, the situation where the wound part covering surface 111 sticks to and adheres to the wound part 2 and worsens the symptoms of the wound part 2 can be effectively suppressed.
  • the static friction coefficient on the secondary dressing material facing surface 122 side is set to be relatively smaller than the static friction coefficient on the wound covering surface 111 side, and therefore, to the wound portion on the wound covering surface 111
  • the secondary dressing material facing surface 122 having a relatively small static friction coefficient slides and slides with respect to the diaper 130 while maintaining the fixed / covered state of the wound, and the wound portion covering surface 111 rubs the wound portion. An adverse effect on a medical condition can be suppressed.
  • the performance evaluation regarding the wound part covering sheet 101 described above was performed. Specifically, for various samples, (A) confirmation evaluation of the healing state, (B) confirmation evaluation of the wet state in the wound part, (C) confirmation evaluation of liquid return to the wound part, and (D) ventilation It is a confirmation evaluation of sex.
  • Performance evaluation 1 First, performance evaluation 1 will be described. As a sample, perforet film is used for the first layer, the basis weight is 24 g / m 2 (gram / square meter), and the thickness is 0.3 mm (millimeter). A wound part covering sheet 101 having a thickness of 30 g / m 2 and a thickness of 0.7 mm is prepared, and in the first layer 110, the opening ratio of the second opening 115 occupying the second layer facing surface 112 is fixed to 15%. In each of the samples 1 to 6 of the wound covering sheet 101, the opening ratio of the first opening 114 occupying the wound covering surface 111 is set to 39%, 47%, 58%, 80%, 90% and 95%. Prepared.
  • each sample of the wound portion covering sheet 101 according to Example 1 is affixed to a patient having a wound on the sacrum, respectively,
  • the wound healing state with the diaper worn is evaluated by a treatment specialist who mainly focuses on visual observation.
  • the evaluation was “ ⁇ ”, and when the wound healing effect was remarkably obtained, the evaluation was “ ⁇ ”.
  • (D) air permeability confirmation evaluation the intake air and the exhaust air are circulated for 3 seconds at an air flow rate of 4 cc / cm 2 ⁇ sec (4 cubic centimeters / square centimeter ⁇ second) with respect to the wound covering sheet.
  • the ventilation resistance value (kPa ⁇ s / m) (kilopascal ⁇ second / meter) at that time was measured.
  • an air permeability tester (KESF-8 manufactured by KATO TECK CO. LTD) was used.
  • FIG. 6 shows the performance evaluation 1, that is, the evaluation result when the aperture ratio of the first opening 114 is changed.
  • the performance evaluation For each of the samples 1 to 6 having different opening ratios of the first opening 114, as the performance evaluation, (A) confirmation evaluation of the healing state, (B) confirmation evaluation of the wet state in the wound part, (C) to the wound part
  • the ratio of the opening of the first opening 114 to the wound covering surface 111 is preferably set to approximately 50 to 95%, and more preferably approximately 75 to 95%. It has been found that a particularly excellent effect is obtained when it is preferably set to approximately 80 to 95 percent.
  • the opening ratio of the second opening 115 to the second layer facing surface 112 is preferably set to approximately 3 to 20%, preferably approximately 3 to 50%. In addition, when it was further set to about 3 to 15%, it was recognized that an excellent effect was obtained particularly from the viewpoint of the ability to inhibit liquid return.
  • the thickness of the first layer 110 is preferably set to about 0.1 to 1.2 mm, and further set to about 0.3 to 1.2. In particular, it was confirmed that excellent effects were obtained from the viewpoints of healing performance, wet state maintenance, and liquid return.
  • liquid absorption performance of the wound covering sheet 101 according to the present embodiment having the above specifications is preferably set to about 1.8 g (grams).
  • reference numeral I is a coefficient of static friction in the dry state of the wound covering surface 111 with respect to the wound part
  • reference numeral II is a coefficient of static friction in the wet state of the wound covering surface 111 with respect to the wound part
  • reference numeral III is the secondary dressing
  • the coefficient of static friction in the dry state of the material structure surface 122 with respect to the diaper 130, and the symbol IV indicate the coefficient of static friction in the wet state of the secondary dressing material structure surface 122 with respect to the diaper 130, respectively.
  • the sample 1 in which the opening ratio of the first opening 114 occupying the wound covering surface 111 is set to a relatively large value of 80% is in a dry state and wet compared to the other comparative examples.
  • the static friction coefficient of the wound covering surface 111 with respect to the wound portion is reduced, and the static friction coefficient of the secondary dressing material facing surface 122 with respect to the diaper 130 shows a relatively small value. Therefore, even when an external force is applied to the wound portion covering sheet 101, friction of the wound portion covering surface 111 against the wound portion is caused by the fact that the absolute value of the static friction coefficient of the wound portion covering surface 111 is reduced.
  • the wound portion of the wound covering surface 111 is reduced because the static friction coefficient on the secondary dressing material facing surface 122 side is set to be relatively smaller than the static friction coefficient on the wound covering surface 111 side.
  • the secondary dressing material facing surface 122 having a relatively small static friction coefficient slides and slides with respect to the diaper 130 while maintaining the fixed / covered state on the wound portion, and the wound portion covering surface 111 rubs the wound portion. Adversely affecting the medical condition.
  • a wound covering material having a liquid-permeable first layer and a liquid-absorbing second layer superimposed on the first layer The first layer is composed of a porous sheet in which a plurality of holes are formed, The porous sheet has a wound portion covering surface that covers the wound portion, and a second layer facing surface that faces the second layer on the opposite side of the wound portion covering surface, The second layer is formed on the first layer facing surface facing the first layer and on the opposite side of the first layer facing surface, and receives the wound covering material between the wound portion and the secondary layer.
  • a secondary dressing material facing surface capable of contacting the dressing material; The wound dressing material, wherein a static friction coefficient of the second dressing material facing surface with respect to the secondary dressing material is set to be smaller than a static friction coefficient with respect to the wound portion of the wound dressing surface.
  • Each of the plurality of holes in the porous sheet has a first opening formed in the wound covering surface and a second opening formed in the second layer facing surface, Wound covering material characterized in that an opening ratio of the first opening occupying the wound covering surface is set larger than an opening ratio of the second opening occupying the second layer side facing surface.
  • the wound dressing material according to any one of aspects 1 to 3,
  • the first opening portion having a predetermined opening ratio with respect to the wound portion covering surface maintains a predetermined amount of exudate from the wound portion in the second layer, and is opposed to the second layer side.
  • the second opening having a predetermined opening ratio with respect to the surface maintains a predetermined amount of leakage of the exudate held in the second layer to the wound portion side, and exudation by the first opening
  • the wound covering material, wherein the liquid absorption amount is set so as to exceed the leakage amount of exudate from the second opening.
  • Each of the plurality of holes is formed in a substantially conical shape having the first opening and the second opening as a bottom surface and a top surface, respectively.
  • the wound dressing material according to any one of aspects 1 to 13,
  • the airflow resistance value from the wound part covering surface of the first layer to the side surface opposite to the first layer in the second layer is set to be 0.1 Ks ⁇ s / m or less. Wound covering material.

Abstract

[Problem] To provide wound-covering art that will improve the effectiveness of the covering of a wound. [Solution] A wound covering material (101) including a liquid-permeable first layer and an absorbent second layer. The first layer is composed of a porous sheet that has multiple pores (113) formed therein, and the porous sheet includes a wound covering surface that covers a wound, and a surface that faces the second layer. The second layer (120) includes a surface (121) that faces the first layer and a surface (122) that faces a secondary dressing material. The coefficient of static friction of the secondary dressing material to the surface that faces the secondary dressing material is set to be lower than the coefficient of static friction of the wound to the wound covering surface (111).

Description

創傷部被覆材Wound covering material
本発明は、創傷部を被覆して手当てすることに用いられる創傷部被覆材に関する。 The present invention relates to a wound covering material used for covering and treating a wound.
　特開２０１１－１１５６１１号公報（特許文献１）は、滲出液を吸収および保持するための創傷部被覆材を開示している。この創傷部被覆材は、疎水性を有し、ＪＩＳＬ１０９６の通気度が２０～２０００ｃｍ３／ｃｍ２・ｓであって、ＪＩＳＬ１０９２の撥水度が３点以上とすることにより、初期耐水圧の機能を発揮し、創傷面に対面する多孔シートを含む第１層と、創傷部位から滲み出し前記第１層を透過した滲出液を吸収する機能を発揮する第２層とを含む構成とされている。 Japanese Patent Application Laid-Open No. 2011-115611 (Patent Document 1) discloses a wound covering material for absorbing and retaining exudate. This wound covering material has hydrophobicity, the air permeability of JISL1096 is 20 to 2000 cm 3 / cm 2 · s, and the water repellency of JISL1092 is 3 points or more, so that the function of initial water pressure resistance is achieved. And includes a first layer including a porous sheet facing the wound surface and a second layer that functions to absorb exudate that has exuded from the wound site and permeated through the first layer. .
　創傷部被覆材を用いて創傷部を効果的に治療するには、第１に、創傷部からの滲出液を創傷部被覆材に適度に保持することで、当該創傷部被覆材によって被覆された創傷領域を適切に湿潤状態に保つことが求められる。また、滲出液が創傷部から適度に排出されることによって、創傷部が不必要に圧迫されることを回避する必要がある。さらに創傷部被覆材が創傷部に固着し、あるいは創傷部に擦れることで創傷部被覆材自体が創傷悪化の原因とならないようにすることが求められる。 In order to treat a wound part effectively using a wound part covering material, first, the exudate from the wound part was appropriately held in the wound part covering material, and thereby covered with the wound part covering material. There is a need to keep the wound area properly moist. Moreover, it is necessary to avoid that the wound part is unnecessarily pressed by the exudate being appropriately discharged from the wound part. Furthermore, it is required that the wound part covering material adheres to the wound part or is rubbed against the wound part so that the wound part covering material itself does not cause deterioration of the wound.
とくに創傷部被覆材と創傷部とが相対的に移動することにより、当該創傷部被覆材が創傷部を擦るように摺動動作すると、当該摺動動作によって創傷に悪影響を及ぼす可能性が生じることになり、当該摺動動作の回避が重要になってくる。 In particular, when the wound part covering material and the wound part move relatively so that the wound part covering material slides so as to rub the wound part, there is a possibility that the sliding action may adversely affect the wound. Therefore, it is important to avoid the sliding motion.
一方、創傷部被覆材の創傷部に対する摺動動作を回避するべく、創傷部被覆材が創傷部にあまり密着しないようにする構成とした場合、当該摺動動作に起因した問題は緩和できるものの、創傷部被覆材は創傷部を被覆して所定の湿潤状態を供出する必要があるところ、そのような湿潤状態の作出に困難をきたすため、創傷治療効果の点で問題がある。 On the other hand, in order to avoid the sliding movement of the wound part covering material with respect to the wound part, when configured so that the wound part covering material does not closely adhere to the wound part, problems caused by the sliding action can be alleviated, The wound dressing material needs to cover the wound portion and provide a predetermined wet state. However, it is difficult to produce such a wet state, and thus there is a problem in terms of wound treatment effect.
特開２０１１－１１５６１１号公報JP 2011-115611 A
　本発明は、上記に鑑み、創傷部の被覆効果を向上するのに資する創傷部被覆技術を提供することを目的とする。 In view of the above, an object of the present invention is to provide a wound covering technique that contributes to improving the covering effect of a wound.
　上記課題は特許請求の範囲記載の発明によって解決される。以下、本発明を実施するための形態に基づいて説明する。本発明によれば、液透過性の第１層と、前記第１層に重ねられた吸液性の第２層とを有する創傷部被覆材が構成される。 The above problem is solved by the invention described in the claims. Hereinafter, the present invention will be described based on embodiments for carrying out the present invention. According to this invention, the wound part coating | covering material which has a liquid-permeable 1st layer and the liquid-absorbing 2nd layer accumulated on the said 1st layer is comprised.
　第１層における「液透過性」は、当該第１層が、液（典型的には創傷部からの滲出液）を全て透過する態様、部分的に透過する態様のいずれも含む。また第２層における「吸液性」は、当該第２層が、液（典型的には創傷部からの滲出液）を吸収して保持する状態をいい、当該液の全てを吸収し保持する態様、部分的に吸収し、保持する態様のいずれも含む。 “Liquid permeability” in the first layer includes both an aspect in which the first layer permeates all of the liquid (typically exudate from the wound part) and a part of the aspect. “Liquid absorbency” in the second layer refers to a state in which the second layer absorbs and holds the liquid (typically exudate from the wound), and absorbs and holds all of the liquid. Embodiments include both embodiments and partially absorbing and retaining embodiments.
また本発明における「創傷」は、熱傷、褥瘡、挫傷、擦過傷、あるいは潰瘍といった各種の症例を包含する。第１層と第２層とは、直接的に重ねられる態様、および両者の間に介在層が設けられた状態で重ねられる態様のいずれも含む。介在層を設ける場合、当該介在層につき、吸液性の層で構成することにより、第２層と吸液・保持を協働する態様が可能である。あるいは当該介在層を透液性の層で構成することにより、第１層を透過した液が第２層に送られることを許容する態様としてもよい。また介在層を単層で構成する態様、複数層で構成する態様のいずれも包含する。 The “wound” in the present invention includes various cases such as burns, pressure sores, contusions, abrasions, or ulcers. The first layer and the second layer include both a mode in which they are directly stacked and a mode in which they are stacked in a state in which an intervening layer is provided between them. In the case of providing an intervening layer, the intervening layer is constituted by a liquid-absorbing layer, so that the second layer and the liquid-absorbing / holding can cooperate with each other. Or it is good also as an aspect which accept | permits that the liquid which permeate | transmitted the 1st layer is sent to a 2nd layer by comprising the said intervening layer by a liquid-permeable layer. Moreover, both the aspect which comprises an intervening layer by a single layer, and the aspect comprised by multiple layers are included.
　本発明における第1層は、複数の孔が形成された多孔性シートによって構成される。
そして第１層を構成する多孔性シートは、創傷部を被覆する創傷部被覆面と、当該創傷部被覆面とは反対側において前記第２層に臨む第２層対向面とを有する。複数の孔は、第１層において、少なくとも創傷部被覆部領域に対応して形成されていれば足りるが、第１層の全面に渡って形成されていてもよい The first layer in the present invention is constituted by a porous sheet in which a plurality of holes are formed.
And the porous sheet which comprises a 1st layer has the wound part coating | coated surface which coat | covers a wound part, and the 2nd layer opposing surface which faces the said 2nd layer in the opposite side to the said wound part coating | coated surface. The plurality of holes may be formed in the first layer so as to correspond to at least the wound portion covering region, but may be formed over the entire surface of the first layer.
一方、本発明における第２層は、第１層に臨む第１層対向面と、当該第１層対向面とは反対側に形成されるとともに、当該創傷部被覆材を創傷部との間で受ける二次ドレッシング材に当接可能な二次ドレッシング材対向面とを有する。二次ドレッシング材としては、例えばおむつ、ガーゼ、包帯などが適宜に用いられる。
　また、二次ドレッシング材には、創傷部被覆材載置面が形成される。 On the other hand, the second layer in the present invention is formed on the opposite side of the first layer facing surface facing the first layer and the first layer facing surface, and the wound portion covering material is disposed between the wound portion and the wound portion. A secondary dressing material facing surface capable of contacting the secondary dressing material to be received. As the secondary dressing material, for example, diapers, gauze, bandages, etc. are used as appropriate.
Moreover, a wound part covering material mounting surface is formed on the secondary dressing material.
本発明においては、二次ドレッシング材対向面の二次ドレッシング材に対する静摩擦係数が、創傷部被覆面の創傷部に対する静摩擦係数よりも小さく設定されている。 In this invention, the static friction coefficient with respect to the secondary dressing material of a secondary dressing material opposing surface is set smaller than the static friction coefficient with respect to the wound part of a wound part coating surface.
このように構成することにより、外力の入力等により、創傷部被覆材が創傷部に対して擦れる力を受ける場合であっても、静摩擦係数が小さく設定された二次ドレッシング材対向面と二次ドレッシング材との間に相対移動動作が生じることになり、反対に、創傷部被覆材と創傷部の当接状態に不要の変動を生じさせないで済むことになる。このため、創傷部被覆材が創傷部に対して摺動動作して擦れることが防止でき、創傷部の効果的な保護に資することになる。すなわち、創傷部被覆材に外力が作用した場合に、第１層と創傷部との当接状態を維持しつつ、第２層と前記二次ドレッシング材との間に相対移動が生じるように構成されていることを特徴とする創傷部被覆材が構築される。また本発明は、創傷部被覆材に外力が作用した場合に、創傷部被覆材と二次ドレッシング材との間の相対移動を生じさせることで、創傷部の被覆状態を維持し、もって創傷部被覆材の擦れによる創傷部への悪影響を抑制する技術に関することから、とくに褥瘡シートとしての利用に好適である。 By comprising in this way, even if it is a case where a wound part covering material receives the force which rubs against a wound part by input of external force, etc., the secondary dressing material opposing surface and secondary where a coefficient of static friction was set small A relative movement operation will occur between the dressing material and, on the contrary, unnecessary fluctuations in the contact state between the wound covering material and the wound portion can be avoided. For this reason, the wound part covering material can be prevented from sliding and rubbing against the wound part, which contributes to effective protection of the wound part. That is, when an external force is applied to the wound part covering material, the relative movement occurs between the second layer and the secondary dressing material while maintaining the contact state between the first layer and the wound part. A wound covering material is constructed which is characterized in that In addition, the present invention maintains the wound covering state by causing a relative movement between the wound covering material and the secondary dressing material when an external force is applied to the wound covering material, and thus the wound portion. It is particularly suitable for use as a pressure ulcer sheet because it relates to a technique for suppressing adverse effects on the wound due to rubbing of the covering material.
　本発明の一つの態様として、多孔性シートにおける複数の孔のそれぞれは、創傷部被覆面に形成された第１開口部と、第２層対向面に形成された第２開口部とを有るように構成される。換言すれば、複数の孔のそれぞれにつき、創傷部被覆面に臨む開口が第１開口部に対応し、第２層対向面に臨む開口が第２開口部に対応するよう構成する。そして創傷部被覆面に占める第１開口部の開口比率が、第２層側対向面に占める第２開口部の開口比率よりも大きく設定されていることが好ましい。各面に占める開口比率は、当該面全体に対する開口部の面積比率によって規定される。すなわち第１開口部の開口比率が第２開口部の開口比率よりも大きいとは、創傷部被覆面の面積（実効面積）に対する各孔の第１開口部の合計面積の比率が、第２層側対向面の面積（実効面積）に対する各孔の第２開口部の合計面積の比率よりも大きく設定されることを意味する。 As one aspect of the present invention, each of the plurality of holes in the porous sheet has a first opening formed in the wound covering surface and a second opening formed in the second layer facing surface. Configured. In other words, for each of the plurality of holes, the opening facing the wound covering surface corresponds to the first opening, and the opening facing the second layer facing surface corresponds to the second opening. And it is preferable that the opening ratio of the 1st opening part which occupies for a wound part covering surface is set larger than the opening ratio of the 2nd opening part which occupies for the 2nd layer side opposing surface. The opening ratio in each surface is defined by the area ratio of the opening to the entire surface. That is, the opening ratio of the first opening is larger than the opening ratio of the second opening. The ratio of the total area of the first opening of each hole to the area (effective area) of the wound covering surface is the second layer. It means that it is set to be larger than the ratio of the total area of the second openings of each hole to the area (effective area) of the side facing surface.
　このように構成することで、創傷部からの液（典型的には滲出液）につき、第１開口部を通じて創傷部被覆材に取り込み易くするとともに、一度取り込んだ液が、これを吸収ないし保持する第２層から、当該第２層に臨む第２開口部および第1層を通じて、外部、とくに創傷部側へと漏出することを極力防止することが可能になる。これにより被覆された創傷部における適正な湿潤状態を維持することができる。また本発明においては、創傷部被覆面における第１開口部による開口比率を相対的に大きく設定することにより、創傷部被覆面が創傷部に直接接触する割合を相対的に小さくすることができる。これによって創傷部被覆面が創傷部に張り付いて固着し、創傷部の症状を悪化させる事態を効果的に抑制することができ、創傷の症状が軽度のものから重度のものまで、幅広く対処することが可能になる。 By comprising in this way, about the liquid (typically exudate) from a wound part, while making it easy to take in a wound part covering material through a 1st opening part, the liquid once taken in absorbs or hold | maintains this. It is possible to prevent leakage from the second layer through the second opening facing the second layer and the first layer to the outside, in particular, to the wound part as much as possible. Thereby, the appropriate wet state in the wound part covered can be maintained. Moreover, in this invention, the ratio which a wound part coating surface directly contacts a wound part can be made relatively small by setting the opening ratio by the 1st opening part in a wound part coating surface relatively large. This makes it possible to effectively prevent the wound covering surface from sticking to the wound and aggravating the symptoms of the wound, and dealing with a wide range of symptoms from mild to severe. It becomes possible.
　また本発明の一つの態様として、上記創傷被覆材における第１層は、第２層と創傷部の間に介在して第２層が当該創傷部に直接当節することを回避するとともに、創傷部被覆材に外力が作用した場合に、前記第１層と創傷部との当接状態を維持しつつ、前記第２層と前記二次ドレッシング材との間に相対移動が生じるように構成するのが好ましい。これにより創傷部被覆面と創傷部との間の摺動動作が抑制され、創傷部被覆材に外力が作用した場合であっても、創傷部が擦れによって悪影響を受けることを抑制することができる。 Moreover, as 1 aspect of this invention, while the 1st layer in the said wound dressing is interposed between a 2nd layer and a wound part, while avoiding that a 2nd layer hits the said wound part directly, a wound When an external force is applied to the part covering material, it is configured such that relative movement occurs between the second layer and the secondary dressing material while maintaining the contact state between the first layer and the wound part. Is preferred. Thereby, the sliding operation between the wound part covering surface and the wound part is suppressed, and even when an external force is applied to the wound part covering material, it is possible to suppress the wound part from being adversely affected by rubbing. .
　また本発明の一つの態様として、第１層と第２層とは互いに溶着または接着剤によって接合することが好ましい。溶着については、第1層および第２層を熱溶融繊維によって形成し、あるいは熱溶融性繊維を部分的に混入して形成し、当該熱溶融繊維を熱溶着することで第1層と第２層を溶着する態様が好ましい。 Also, as one aspect of the present invention, the first layer and the second layer are preferably joined to each other by welding or an adhesive. For the welding, the first layer and the second layer are formed by hot-melt fibers or partially mixed with hot-melt fibers, and the hot-melt fibers are heat-welded to form the first layer and the second layer. An embodiment in which the layers are welded is preferred.
また本発明の一つの態様として、創傷部被覆面に対して所定の開口比率を有する第１開口部は、第２層における創傷部からの滲出液の吸液量を所定量に維持することが好ましい。一方、第２層側対向面に対して所定の開口比率を有する第２開口部は、第２層で保持された滲出液の創傷部側への漏出量を所定量に維持することが好ましい。このように構成することで、創傷部被覆材で被覆された創傷部における浸出液のトータル量を合理的に制御することが可能となり、当該創傷部の湿潤状態の最適化および維持を図ることが可能になる。 Moreover, as 1 aspect of this invention, the 1st opening part which has a predetermined | prescribed opening ratio with respect to a wound part covering surface can maintain the liquid absorption amount of the exudate from the wound part in a 2nd layer at a predetermined amount. preferable. On the other hand, it is preferable that the second opening portion having a predetermined opening ratio with respect to the second layer side facing surface maintains a predetermined amount of leakage of exudate held in the second layer to the wound portion side. By configuring in this way, it becomes possible to rationally control the total amount of exudate in the wound covered with the wound covering material, and it is possible to optimize and maintain the wet state of the wound become.
本発明の一つの態様として、複数の孔のそれぞれは、第１開口部から第２開口部に向かうにつれて、有効段面積が順次減少するように形成することが好ましい。これにより、創傷部からの吸液促進と、第２層からの液漏出の抑制とが、合理的に実現される。 As one aspect of the present invention, each of the plurality of holes is preferably formed such that the effective step area decreases sequentially from the first opening toward the second opening. Thereby, the liquid absorption promotion from a wound part and suppression of the liquid leakage from a 2nd layer are implement | achieved rationally.
　とりわけ、複数の孔のそれぞれは、第１開口部および第２開口部をそれぞれ底面および頂面とする略円錐形状に形成することが好ましい。 In particular, each of the plurality of holes is preferably formed in a substantially conical shape having the first opening and the second opening as the bottom surface and the top surface, respectively.
「円錐形状に形成」とは、創傷部被覆材を側面から観察した場合に、複数の孔のそれぞれが逆コーン形状（すり鉢形状）を呈するように形成する意味であり、これにより傷部からの吸液促進と、第２層からの液漏出の抑制とが一層確実に実現可能とされる。 “Forming in a conical shape” means that each of a plurality of holes forms an inverted cone shape (conical shape) when the wound covering material is observed from the side surface. Promotion of liquid absorption and suppression of liquid leakage from the second layer can be realized more reliably.
　本発明の一つの態様として、第１層は、第２層が吸液した滲出液につき、例えば創傷部に見立てて牛肉を用いた場合を想定すると、創傷部被覆面側に漏出する割合が略５パーセント以内となるように設定することが好ましい。これにより、創傷部が過剰に湿潤することを抑制することができる。 As one aspect of the present invention, the first layer has a ratio of leaking to the wound covering surface side, assuming that the exudate absorbed by the second layer is, for example, a case where beef is used in the wound part. It is preferable to set it to be within 5 percent. Thereby, it can suppress that a wound part wets excessively.
　本発明の一つの態様として、塩化ナトリウム０．９パーセント溶液５ミリリットルが第１層の創傷部被覆面を通じて第２層に供給されるとともに、創傷部被覆面に一平方センチメートル当たり５グラムの荷重が３分間作用した場合の漏出量が、略０～０・１グラムの範囲内に抑制されることが好ましい。これにより、創傷部が過剰に湿潤することを抑制することができる。 In one embodiment of the present invention, 5 milliliters of a 0.9 percent sodium chloride solution is supplied to the second layer through the wound covering surface of the first layer and a load of 5 grams per square centimeter is applied to the wound covering surface. The amount of leakage when acting for a minute is preferably suppressed within a range of approximately 0 to 0.1 grams. Thereby, it can suppress that a wound part wets excessively.
　また本発明の一つの態様として、創傷部被覆面に占める第１開口部の開口比率が、略５０～９５パーセント、好適には略５０～９０パーセントに設定されていることが好ましい。第１開口部の開口比率を比較的大きく設定することで、第１層の創傷部被覆面における滲出液の吸液性を高め、通気性を向上し、かつ、創傷部被覆面が患者の創傷部に接触する面積を極力低減することができ、創傷部の湿潤性の確保と、創傷部への接触面積の低減化の双方を同時に満たすことが可能とされる。 Also, as one aspect of the present invention, it is preferable that the opening ratio of the first opening occupying the wound surface is set to about 50 to 95 percent, preferably about 50 to 90 percent. By setting the opening ratio of the first opening relatively large, the absorbability of exudate on the wound portion covering surface of the first layer is improved, the air permeability is improved, and the wound portion covering surface is a patient wound. The area in contact with the part can be reduced as much as possible, and both wettability of the wound part and reduction of the contact area with the wound part can be satisfied at the same time.
　とりわけ創傷部被覆面に占める第１開口部の開口比率が略７５～９５パーセント、好適には略８０～９５パーセントに設定されていることが好ましい。これにより創傷部の湿潤性の確保と、創傷部への接触面積の低減化を究極化することが可能とされる。 In particular, it is preferable that the opening ratio of the first opening occupying the wound covering surface is set to about 75 to 95 percent, preferably about 80 to 95 percent. This makes it possible to ultimately ensure the wettability of the wound part and reduce the contact area with the wound part.
また本発明の一つの態様として、第２層側対向面に占める第２開口部の開口比率が略３～５０パーセントに設定されていることが好ましい。第２開口部の開口比率を比較的小さく設定することで、第２層に吸収保持された液が、第１層の第２開口を通じて創傷部へ漏出して戻ってしまうことが効果的に防止される。 As one aspect of the present invention, it is preferable that the opening ratio of the second opening occupying the second layer side facing surface is set to approximately 3 to 50 percent. By setting the opening ratio of the second opening relatively small, the liquid absorbed and retained in the second layer is effectively prevented from leaking back to the wound through the second opening of the first layer. Is done.
　とりわけ、第２層側対向面に占める第２開口部の開口比率が略３～２０パーセント、好適には略３～２０パーセントに設定されていることが好ましい。これにより第２層に吸収保持された液の創傷部への漏出量を究極に低減化することが可能とされる。 In particular, it is preferable that the opening ratio of the second opening occupying the second layer side facing surface is set to approximately 3 to 20 percent, preferably approximately 3 to 20 percent. This makes it possible to ultimately reduce the amount of leakage of the liquid absorbed and held in the second layer to the wound part.
　また本発明の一つの態様として、第１層の見かけ上の厚みは、治癒性能、湿潤状態維持、液戻り性の観点にて、略０．１～１．２ミリメートルに設定されていることが好ましく、さらに略０．３～１．２に設定すると一層好ましい。 Further, as one aspect of the present invention, the apparent thickness of the first layer is set to about 0.1 to 1.2 mm from the viewpoints of healing performance, wet state maintenance, and liquid return properties. More preferably, it is more preferably set to about 0.3 to 1.2.
　本発明の一つの態様として、第１層の創傷部被覆面から、第２層における第１層と反対側面への通気抵抗値が０．１Ｋs・ｓ／ｍ以下となるように設定されていることが好ましい。通気抵抗値を相対的に低く抑えることにより、創傷部が蒸れ過ぎて治癒に悪影響を及ぼす事態を効果的に防止することができる。 As one aspect of the present invention, the ventilation resistance value from the wound layer covering surface of the first layer to the side surface opposite to the first layer in the second layer is set to be 0.1 Ks · s / m or less. It is preferable. By keeping the ventilation resistance value relatively low, it is possible to effectively prevent the wounded part from becoming too steamy and adversely affecting healing.
　本発明によれば、創傷部の被覆の有効性を向上するのに資する創傷部被覆技術が提供されることとなった。
  ADVANTAGE OF THE INVENTION According to this invention, the wound part coating technique which contributes to improving the effectiveness of the covering of a wound part was provided.
本発明の実施例１に係る創傷部被覆シート１０１の概要を示す模式的斜視図である。It is a typical perspective view which shows the outline | summary of the wound part coating sheet 101 which concerns on Example 1 of this invention. 実施例１に係る創傷部被覆シート１０１の詳細な構成を示す模式的断面図である。3 is a schematic cross-sectional view showing a detailed configuration of a wound part covering sheet 101 according to Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の詳細な構成を示す模式的断面図である。3 is a schematic cross-sectional view showing a detailed configuration of a wound part covering sheet 101 according to Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価の一つの実施態様を示す模式的断面図である。It is typical sectional drawing which shows one embodiment of the performance evaluation of the wound part coating sheet 101 which concerns on Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価の一つの実施態様を示す模式的断面図である。It is typical sectional drawing which shows one embodiment of the performance evaluation of the wound part coating sheet 101 which concerns on Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価結果を示す図である。It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価結果を示す図である。It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価結果を示す図である。It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価結果を示す図である。It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1. FIG. 実施例１に係る創傷部被覆シート１０１の性能評価結果を示す図である。It is a figure which shows the performance evaluation result of the wound part coating sheet 101 which concerns on Example 1. FIG.
（実施例１）
以下本発明を実施するための最良の形態につき、各種実施例によって更に詳細に説明する。本発明の実施例１に係る創傷部被覆シート１０１の構造が、図１～図３に模式的に示される。当該創傷部被覆シート１０１は、シート状に形成された第1層１１０と、同様にシート状に形成された第２層１２０とが、互いにスプレーホットメルト面接合されて一体状に形成されている。両者の接合は熱溶着で行ってもよい。当当該創傷部被覆シート１０１は、本発明における「創傷部被覆材」に対応する一つの実施構成例である。また第1層１１０および第２層１２０は、本発明における「第１層」「第２層」に対応する一つの実施構成例である。 (Example 1)
Hereinafter, the best mode for carrying out the present invention will be described in more detail with reference to various examples. The structure of the wound part covering sheet 101 according to Example 1 of the present invention is schematically shown in FIGS. The wound portion covering sheet 101 is formed integrally with a first layer 110 formed in a sheet shape and a second layer 120 similarly formed in a sheet shape by spray hot-melt surface bonding to each other. . Both may be joined by heat welding. The said wound part coating | coated sheet | seat 101 is one implementation structural example corresponding to the "wound part coating | covering material" in this invention. Further, the first layer 110 and the second layer 120 are one implementation configuration example corresponding to the “first layer” and the “second layer” in the present invention.
（第１層）
　第１層１１０は、図３に示す創傷部２ないし肌面１に接触する、液透過性の多孔性シート１１０ａとして（図３では創傷部２への接触状態が示される）、所定の耐水圧性、すなわち所定の通気度および撥水度を有するとともに、例えばパーフォレットフィルム等によって好適に構成される。この液透過性の多孔性シート１１０ａは、本発明における「多孔性シート」に対応する一つの実施構成例である。第１層の形成材料としては、フィルム以外に、例えば熱可塑性ポリマーからなる不織布を用いることも可能である。 (First layer)
The first layer 110 is a liquid-permeable porous sheet 110a that is in contact with the wound part 2 or the skin surface 1 shown in FIG. 3 (showing the contact state with the wound part 2 in FIG. 3), and has a predetermined water pressure resistance. In other words, it has a predetermined air permeability and water repellency, and is suitably constituted by, for example, a perforet film. This liquid-permeable porous sheet 110a is one embodiment configuration example corresponding to the “porous sheet” in the present invention. As a material for forming the first layer, in addition to the film, for example, a nonwoven fabric made of a thermoplastic polymer can be used.
　第１層１１０は、図３に示す創傷部２に臨む形で肌面１に貼付されて当該創傷部２を被覆するための創傷部被覆面１１１と、第２層１２０に対向状に向かう第２層対向面１１２を有する。この創傷部被覆面１１１および第２層対向面１１２は、本発明の「創傷部被覆面」および「第２層対向面」にそれぞれ対応する一つの実施構成例である。また第１層１１０を形成する多孔性シート１１０ａは、当該創傷部被覆面１１１と第２層体構面１１２との間を貫通する複数の孔１１３を有する。この孔１１３は本発明の「孔」に対応する一つの実施構成例である。 The first layer 110 is attached to the skin surface 1 so as to face the wound portion 2 shown in FIG. 3 and the wound portion covering surface 111 for covering the wound portion 2 and the second layer 120 facing the second layer 120. A two-layer facing surface 112 is provided. The wound portion covering surface 111 and the second layer facing surface 112 are one implementation configuration example corresponding to the “wound portion covering surface” and the “second layer facing surface” of the present invention, respectively. Further, the porous sheet 110a forming the first layer 110 has a plurality of holes 113 penetrating between the wound portion covering surface 111 and the second layer body construction surface 112. This hole 113 is one implementation configuration example corresponding to the “hole” of the present invention.
　複数の孔１１３のそれぞれは、創傷部被覆面１１１に開口する第１開口部１１４と、第２層体構面１１２に開口する第２開口部１１５を有する。第１開口部１１４と第２開口部１１５は、本発明の「第１開口部」および「第２開口部」にそれぞれ対応する一つの実施構成例である。 Each of the plurality of holes 113 has a first opening 114 that opens to the wound covering surface 111 and a second opening 115 that opens to the second layer body construction surface 112. The 1st opening part 114 and the 2nd opening part 115 are one implementation structural example corresponding to the "1st opening part" and the "2nd opening part" of this invention, respectively.
創傷部被覆面１１１上に多数形成された第１開口部１１４の総面積が当該創傷部被覆面１１１の総面積に占める割合、すなわち第１開口部１１４の開口比率は、第２層側対向面１１２上に多数形成された第２開口部１１５の総面積が当該第２層側対向面１１２の総面積に占める割合、すなわち第２開口部１１５の開口比率よりも大きくなるように設定されている。両者の開口比率の具体値については、以下の性能評価の項目にて詳しく説明する。 The ratio of the total area of the first openings 114 formed in large numbers on the wound covering surface 111 to the total area of the wound covering surface 111, that is, the opening ratio of the first opening 114 is the second layer side facing surface 112 is set such that the total area of the second openings 115 formed in large numbers on the area 112 occupies the total area of the second layer side facing surface 112, that is, the opening ratio of the second openings 115. . The specific values of the opening ratios of both will be described in detail in the following performance evaluation items.
（第２層）
図１～図３に示す第２層１２０は、液吸収性のエアレイド不織布や、あるいはエアスルー不織布によって好適に構成される。第２層１２０は、第１層１１０に向かう第１層対向面１２１と、図３に示すおむつ１３０に向かう二次ドレッシング対向面１２２を有する。第２層１２０、第１層対向面１２１、二次ドレッシング材対向面１２２は、本発明における「第２層」「第１層対向面」「二次ドレッシング材対向面」にそれぞれ対応する一つの実施構成例である。 (Second layer)
The second layer 120 shown in FIGS. 1 to 3 is preferably composed of a liquid-absorbing air laid nonwoven fabric or an air-through nonwoven fabric. The 2nd layer 120 has the 1st layer opposing surface 121 which goes to the 1st layer 110, and the secondary dressing opposing surface 122 which goes to the diaper 130 shown in FIG. The second layer 120, the first layer facing surface 121, and the secondary dressing material facing surface 122 are each one of the “second layer”, “first layer facing surface”, and “secondary dressing material facing surface” in the present invention. It is an implementation structural example.
（第1層と第２層の接合）
　本実施例１では、第1層と第２層の接合につき、ヒートシールによる熱溶着が用いられているが、このほかにも、ホットメルト接着剤等を用いた接着、あるいはエンボス加工による重合等が可能である。 (Join the first layer and the second layer)
In the first embodiment, for the joining of the first layer and the second layer, heat welding by heat sealing is used, but in addition, adhesion using a hot melt adhesive or the like, polymerization by embossing, etc. Is possible.
（おむつ）
　本実施例１に係る創傷部被覆シート１０１は、図３に示すように、おむつ１３０に載置した上で患者の肌面１における創傷部２に適用される。このおむつ１３０の材質や基本構成に関しては、従来品と同等のものが好適に用いられ得る。おむつ１３０には創傷部被覆シート載置面１３１が形成されており、上記創傷部被覆シート１０１がこの創傷部被覆シート載置面１３１に載置されて一体化されることとなる（図３では、説明の便宜上、両者を離間して示している）。おむつ１３０、創傷部被覆シート載置面１３１は、本発明における「二次ドレッシング材」「創傷部被覆材載置面」にそれぞれ対応する一つの実施構成例である。 (Diapers)
As shown in FIG. 3, the wound portion covering sheet 101 according to the first embodiment is applied to the wound portion 2 on the skin surface 1 of the patient after being placed on the diaper 130. With respect to the material and basic configuration of the diaper 130, those equivalent to the conventional products can be suitably used. A wound part covering sheet placement surface 131 is formed on the diaper 130, and the wound part covering sheet 101 is placed on and integrated with the wound part covering sheet placement surface 131 (FIG. 3). For convenience of explanation, the two are shown apart from each other). The diaper 130 and the wound part covering sheet placement surface 131 are one implementation configuration example corresponding to the “secondary dressing material” and the “wound part covering material placement surface” in the present invention, respectively.
　また本実施例１では、創傷部被覆面１１１における第１開口部１１４の開口比率を大きく設定することにより、創傷部被覆面１１１の創傷部に対する静摩擦係数が低減される構成とされている。さらに、二次ドレッシング材対向面１２２のおむつ１３０に対する静摩擦係数は、当該創傷部被覆面１１１の創傷部に対する静摩擦係数よりも更に相対的に小さな値となるように設定されている。 In the first embodiment, the static friction coefficient of the wound portion covering surface 111 with respect to the wound portion is reduced by setting the opening ratio of the first opening 114 in the wound portion covering surface 111 to be large. Furthermore, the static friction coefficient with respect to the diaper 130 of the secondary dressing material facing surface 122 is set to be a relatively smaller value than the static friction coefficient with respect to the wound portion of the wound covering surface 111.
本実施例１に係る創傷部被覆シート１０１は以上のように構成される。とりわけ当該創傷部被覆シート１０１においては、創傷部被覆面１１１の総面積に占める第１開口部１１４の開口比率が、第２層側対向面１１２の総面積に占める第２開口部１１５の開口比率よりも大きく設定されている。これにより、創傷部２からの液（典型的には滲出液）について、第１開口部１１４を通じて、創傷部被覆シート１０１に取り込み易くするとともに、一度取り込んだ液が、これを吸収ないし保持する第２層１２０から逆戻りして、第２開口部１１５および第1開口部１１４を経て、創傷部２側へと漏出することを抑制することができる。これにより創傷部被覆シート１０１によって被覆された創傷部２における適正な湿潤状態を維持することができる。また、創傷部被覆面１１１における第１開口部１１４による開口比率を相対的に大きく設定することにより、創傷部被覆面１１１が創傷部２に直接接触する割合を相対的に小さくすることができる。従って、創傷部被覆面１１１が創傷部２に張り付いて固着し、創傷部２の症状を悪化させる事態を効果的に抑制することができる。 The wound part covering sheet 101 according to the first embodiment is configured as described above. In particular, in the wound part covering sheet 101, the opening ratio of the first opening 114 occupying the total area of the wound part covering surface 111 is the opening ratio of the second opening 115 occupying the total area of the second layer side facing surface 112. Is set larger than. Thereby, the liquid (typically exudate) from the wound part 2 is easily taken into the wound part covering sheet 101 through the first opening 114, and the liquid once taken in absorbs or holds the liquid. It is possible to suppress leakage from the two layers 120 to the wound part 2 side through the second opening 115 and the first opening 114. Thereby, the appropriate wet state in the wound part 2 covered with the wound part covering sheet 101 can be maintained. Moreover, the ratio in which the wound part covering surface 111 directly contacts the wound part 2 can be relatively reduced by setting the opening ratio of the first opening 114 in the wound covering surface 111 to be relatively large. Therefore, the situation where the wound part covering surface 111 sticks to and adheres to the wound part 2 and worsens the symptoms of the wound part 2 can be effectively suppressed.
　さらに創傷部被覆シート１０１に外力が作用した場合であっても、創傷部被覆面１１１の静摩擦係数の絶対値が小さくされていることに起因して、創傷部に対する創傷部被覆面１１１の摩擦による悪影響を低減するとともに、二次ドレッシング材対向面１２２側の静摩擦係数が創傷部被覆面１１１側の静摩擦係数より相対的に小さく設定されることに起因して、創傷部被覆面１１１の創傷部への固定・被覆状態を保ったまま、相対的に静摩擦係数の小さい二次ドレッシング材対向面１２２がおむつ１３０に対して滑って摺動することになり、創傷部被覆面１１１が創傷部を擦って病状に悪影響を与えることを抑制することができる。 Further, even when an external force is applied to the wound portion covering sheet 101, due to the fact that the absolute value of the static friction coefficient of the wound portion covering surface 111 is reduced, the friction due to the friction of the wound portion covering surface 111 against the wound portion. In addition to reducing the adverse effects, the static friction coefficient on the secondary dressing material facing surface 122 side is set to be relatively smaller than the static friction coefficient on the wound covering surface 111 side, and therefore, to the wound portion on the wound covering surface 111 The secondary dressing material facing surface 122 having a relatively small static friction coefficient slides and slides with respect to the diaper 130 while maintaining the fixed / covered state of the wound, and the wound portion covering surface 111 rubs the wound portion. An adverse effect on a medical condition can be suppressed.
　上記した創傷部被覆シート１０１に関する性能評価を行った。具体的には、各種のサンプルについて、（Ａ）治癒状態の確認評価、（Ｂ）創傷部における湿潤状態の確認評価、（Ｃ）創傷部への液戻り性の確認評価、および（Ｄ）通気性の確認評価である。 The performance evaluation regarding the wound part covering sheet 101 described above was performed. Specifically, for various samples, (A) confirmation evaluation of the healing state, (B) confirmation evaluation of the wet state in the wound part, (C) confirmation evaluation of liquid return to the wound part, and (D) ventilation It is a confirmation evaluation of sex.
（性能評価１）
　まず性能評価１を説明する。サンプルとして、第１層につき、パーフォレットフィルムにて、目付けが２４ｇ／ｍ２（グラム／平方メートル）、厚みが０．３ｍｍ（ミリメートル）で形成し、第２層につき、エアスルー不織布にて、目付が３０ｇ／ｍ２、厚みが０．７ｍｍの創傷部被覆シート１０１を準備し、さらに第１層１１０において、第２層対向面１１２に占める第２開口部１１５の開口比率を１５パーセントに固定した状態で、創傷部被覆面１１１に占める第１開口部１１４の開口比率が３９パーセント、４７パーセント、５８パーセント、８０パーセント、９０パーセントおよび９５パーセントに設定された創傷部被覆シート１０１の各サンプル１～６を準備した。 (Performance evaluation 1)
First, performance evaluation 1 will be described. As a sample, perforet film is used for the first layer, the basis weight is 24 g / m 2 (gram / square meter), and the thickness is 0.3 mm (millimeter). A wound part covering sheet 101 having a thickness of 30 g / m 2 and a thickness of 0.7 mm is prepared, and in the first layer 110, the opening ratio of the second opening 115 occupying the second layer facing surface 112 is fixed to 15%. In each of the samples 1 to 6 of the wound covering sheet 101, the opening ratio of the first opening 114 occupying the wound covering surface 111 is set to 39%, 47%, 58%, 80%, 90% and 95%. Prepared.
　上記性能評価項目のうち、（Ａ）治癒状態の確認評価については、仙骨に創傷を負った患者に、本実施例１に係る創傷部被覆シート１０１の上記各サンプルをそれぞれ貼付するとともに、その上からおむつを着用した状態での創傷治癒状態について、目視を主体とした治療専門家による評価を行う。結果として創傷治癒効果が得られる場合には、「○」と評価とし、顕著に創傷治癒効果が得られる場合には「◎」と評価した。 Among the above performance evaluation items, (A) For confirmation evaluation of the healing state, each sample of the wound portion covering sheet 101 according to Example 1 is affixed to a patient having a wound on the sacrum, respectively, The wound healing state with the diaper worn is evaluated by a treatment specialist who mainly focuses on visual observation. When the wound healing effect was obtained as a result, the evaluation was “◯”, and when the wound healing effect was remarkably obtained, the evaluation was “◎”.
　また（Ｂ）創傷部における湿潤状態の確認評価については、生体電流インピーダンス法（ＢＩＡ法）を用いて水分率を測定する装置（本評価においては、株式会社ライフ（Life社）製造販売に係る口腔水分計ムーカス）を用いて行った。具体的には、温度２０℃、湿度６０パーセントに維持された恒温恒湿条件において、褥瘡に見立てた牛肉を用いて、初期水分率を測定し、その後、２４時間放置した後で再び水分率を測定することで湿潤状態の経時的な変化を確認し、これによって湿潤状態の確認評価を行うこととした。 Moreover, (B) About the confirmation evaluation of the wet state in a wound part, the apparatus which measures a moisture content using a bioelectric current impedance method (BIA method) (in this evaluation, the oral cavity which concerns on Life (life company) manufacture sale) (Moisture meter Mocus). Specifically, in a constant temperature and humidity condition maintained at a temperature of 20 ° C. and a humidity of 60%, the initial moisture content is measured using beef that looks like a pressure ulcer. By measuring, the change with time of the wet state was confirmed, and thereby the wet state was confirmed and evaluated.
また、（Ｃ）創傷部への液戻り性の確認評価については、図４に示すように、塩化ナトリウム０．９パーセント溶液を創傷部被覆シート１０１に５ミリリットル滴下する。そして図５に示すように、当該被覆シート１０１の第１層１１０の創傷部被覆面１１１上にろ紙Ｆを設置し、当該ろ紙Ｆの上から５ｇ／ｃｍ２（５グラム／平方センチメートル）の荷重Ｗを当該被覆シート１０１に３分間作用させる。その後、ろ紙Ｆに吸収された液の戻り量（グラム）を測定することで、創傷部被覆シート１０１からどの程度の液量が創傷部側に戻されるかを評価した。 Moreover, (C) About confirmation evaluation of the liquid return property to a wound part, as shown in FIG. 4, 5 milliliters of 0.9% sodium chloride solution is dripped at the wound part coating sheet 101. As shown in FIG. And as shown in FIG. 5, the filter paper F is installed on the wound part coating surface 111 of the 1st layer 110 of the said covering sheet 101, and the load W of 5 g / cm < 2 > (5 gram / square centimeter) from the said filter paper F is shown. Is allowed to act on the covering sheet 101 for 3 minutes. Then, by measuring the return amount (gram) of the liquid absorbed by the filter paper F, it was evaluated how much liquid amount was returned from the wound part covering sheet 101 to the wound part side.
また、（Ｄ）通気性の確認評価については、創傷部被覆シートに対して、空気流量４ｃｃ／ｃｍ２・sec（４立方センチメートル／平方センチメートル・秒）にて吸気エアおよび排気エアをそれぞれ３秒間流通させ、その際の通気抵抗値（ｋＰａ・ｓ／ｍ）（キロパスカル・秒／メートル）を測定した。測定には、通気度試験機（カトーテック社（ＫＡＴＯ　ＴＥＣＫ　ＣＯ．ＬＴＤ）製ＫＥＳＦ－８）を用いた。 For (D) air permeability confirmation evaluation, the intake air and the exhaust air are circulated for 3 seconds at an air flow rate of 4 cc / cm 2 · sec (4 cubic centimeters / square centimeter · second) with respect to the wound covering sheet. The ventilation resistance value (kPa · s / m) (kilopascal · second / meter) at that time was measured. For the measurement, an air permeability tester (KESF-8 manufactured by KATO TECK CO. LTD) was used.
性能評価１、すなわち第１開口部１１４の開口率を変化させた場合の評価結果を図６に示す。第１開口部１１４の開口比率が異なる各サンプル１～６につき、上記性能評価として、（Ａ）治癒状態の確認評価、（Ｂ）創傷部における湿潤状態の確認評価、（Ｃ）創傷部への液戻り性の確認評価、および（Ｄ）通気性の確認評価の各結果が示される。
　以上の各確認評価項目に鑑み、第１開口部１１４の創傷部被覆面１１１に占める開口比率に関しては、略５０～９５パーセントに設定することが好適であるとともに、さらに略７５～９５パーセント、より好適には略８０～９５パーセントに設定すると、とりわけ優秀な効果を奏することが認められた。 FIG. 6 shows the performance evaluation 1, that is, the evaluation result when the aperture ratio of the first opening 114 is changed. For each of the samples 1 to 6 having different opening ratios of the first opening 114, as the performance evaluation, (A) confirmation evaluation of the healing state, (B) confirmation evaluation of the wet state in the wound part, (C) to the wound part Each result of confirmation evaluation of liquid return property and (D) confirmation evaluation of air permeability is shown.
In view of the above confirmation evaluation items, the ratio of the opening of the first opening 114 to the wound covering surface 111 is preferably set to approximately 50 to 95%, and more preferably approximately 75 to 95%. It has been found that a particularly excellent effect is obtained when it is preferably set to approximately 80 to 95 percent.
（性能評価２）
次に、性能評価２を説明する。サンプルとして、前記性能評価と同等の基本構成を有する創傷部被覆シートを準備し、その第１層１１０において、創傷部被覆面１１１に占める第１開口部１１４の開口比率を８０パーセントに固定した状態で、第２層対向面１１２に占める第２開口部１１５の開口比率が３パーセント、５パーセント、１５パーセント、５０パーセント、６０パーセントに設定された創傷部被覆シート１０１の各サンプル１～５を準備し、それぞれのサンプルにつき、性能評価１と同様に、（Ａ）治癒状態の確認評価、（Ｂ）創傷部における湿潤状態の確認評価、（Ｃ）創傷部への液戻り性の確認評価、および（Ｄ）通気性の確認評価を行った。この結果を図７に示す。 (Performance evaluation 2)
Next, performance evaluation 2 will be described. As a sample, a wound covering sheet having a basic configuration equivalent to the performance evaluation is prepared, and in the first layer 110, the opening ratio of the first opening 114 occupying the wound covering surface 111 is fixed to 80%. Each sample 1 to 5 of the wound covering sheet 101 having the opening ratio of the second opening 115 occupying the second layer facing surface 112 set to 3%, 5%, 15%, 50%, and 60% is prepared. For each sample, as in the performance evaluation 1, (A) confirmation evaluation of the healing state, (B) confirmation evaluation of the wet state in the wound part, (C) confirmation evaluation of liquid return to the wound part, and (D) The air permeability was confirmed and evaluated. The result is shown in FIG.
図７に示す各確認評価項目に鑑み、第２開口部１１５の第２層対向面１１２に占める開口比率に関しては、略３～２０パーセント、好適には略３～５０パーセントに設定することが好適であるとともに、さらに略３～１５パーセントに設定すると、とくに液戻り抑止能力の観点にて、優秀な効果を奏することが認められた。 In view of the respective confirmation evaluation items shown in FIG. 7, the opening ratio of the second opening 115 to the second layer facing surface 112 is preferably set to approximately 3 to 20%, preferably approximately 3 to 50%. In addition, when it was further set to about 3 to 15%, it was recognized that an excellent effect was obtained particularly from the viewpoint of the ability to inhibit liquid return.
（性能評価３）
次に、性能評価３を説明する。サンプルとして、上記性能評価１、２と同等の創傷部被覆シート１０１において、第１層につき、パーフォレットフィルムにて、目付けが２４ｇ／ｍ２（グラム／平方メートル）、第１開口部の開口比率を８０パーセント、第２開口部の開口比率を１５パーセントに固定し、第２層につき、エアスルー不織布にて、目付が３０ｇ／ｍ２、厚みが０．７ｍｍに固定し、さらに第１層１１０の厚みに関するサンプルとして、０．０７ｍｍ（ミリメートル）、０．１ｍｍ、０．３ｍｍ、０．８ｍｍ、１．２ｍｍに設定された各サンプル１～５を準備し、それぞれのサンプルにつき、性能評価１、２と同様に、（Ａ）治癒状態の確認評価、（Ｂ）創傷部における湿潤状態の確認評価、（Ｃ）創傷部への液戻り性の確認評価、および（Ｄ）通気性の確認評価を行った。この結果を図８に示す。 (Performance evaluation 3)
Next, performance evaluation 3 will be described. As a sample, in the wound covering sheet 101 equivalent to the performance evaluations 1 and 2 described above, the perforation film is used for the first layer, the basis weight is 24 g / m 2 (gram / square meter), and the opening ratio of the first opening is set. 80%, the opening ratio of the second opening is fixed to 15%, and the second layer is fixed to 30 g / m 2 and the thickness is 0.7 mm with an air-through nonwoven fabric, and the thickness of the first layer 110 is further fixed. Samples 1 to 5 set to 0.07 mm (millimeters), 0.1 mm, 0.3 mm, 0.8 mm, and 1.2 mm are prepared. Similarly, (A) confirmation evaluation of healing state, (B) confirmation evaluation of wet state in wound part, (C) confirmation evaluation of liquid return to wound part, and (D) confirmation of breathability. Evaluation was performed. The result is shown in FIG.
図８に示す各確認評価項目に鑑み、第１層１１０の厚みに関しては、略０．１～１．２ｍｍに設定することが好適であるとともに、さらに略０．３～１．２に設定すると、とくに治癒性能、湿潤状態維持、液戻り性の観点にて、優秀な効果を奏することが認められた。 In view of each confirmation evaluation item shown in FIG. 8, the thickness of the first layer 110 is preferably set to about 0.1 to 1.2 mm, and further set to about 0.3 to 1.2. In particular, it was confirmed that excellent effects were obtained from the viewpoints of healing performance, wet state maintenance, and liquid return.
（性能評価４）
　次に、性能評価４を説明する。サンプルとして、上記性能評価１、２、３と同等の創傷部被覆シート１０１において、褥瘡に見立てた牛肉を用いて、第１層につき、パーフォレットフィルムにて、目付けが２４ｇ／ｍ２（グラム／平方メートル）、第１開口部の開口比率を８０パーセント、第２開口部の開口比率を１５パーセント、厚さを０．３ｍｍ（ミリメートル）に固定し、第２層につき、エアスルー不織布にて、目付が３０ｇ／ｍ２とし、液の吸終量を３．０ｇ（グラム）、１．８ｇ、０ｇと異ならせ、それぞれのサンプルにつき、（Ａ）治癒状態の確認評価、（Ｂ）創傷部における湿潤状態の確認評価、（Ｃ）創傷部への液戻り性の確認評価、および（Ｄ）通気性の確認評価を行った。この結果を図９に示す。 (Performance evaluation 4)
Next, performance evaluation 4 will be described. As a sample, in the wound part covering sheet 101 equivalent to the above performance evaluations 1, 2, and 3, using beef that looks like a pressure ulcer, the weight per unit film is 24 g / m 2 (gram / gram) per layer on the first layer. Square meter), the opening ratio of the first opening is fixed to 80%, the opening ratio of the second opening is fixed to 15%, the thickness is fixed to 0.3 mm (millimeter), and the weight per unit area is air-through nonwoven fabric per second layer. 30 g / m 2, and the final absorption amount of the liquid is different from 3.0 g (gram), 1.8 g, and 0 g. For each sample, (A) confirmation evaluation of healing state, (B) wet state in wound part Confirmation evaluation, (C) confirmation evaluation of liquid return property to the wound part, and (D) confirmation evaluation of air permeability. The result is shown in FIG.
図９に示す各確認評価項目に鑑み、上記スペックを有する本実施例に係る創傷部被覆シート１０１の液吸収性能は略１．８ｇ（グラム）程度に設置するのが好適であると認められる。 In view of each confirmation evaluation item shown in FIG. 9, it is recognized that the liquid absorption performance of the wound covering sheet 101 according to the present embodiment having the above specifications is preferably set to about 1.8 g (grams).
（性能評価５）
　次に、性能評価５を説明する。サンプルとして、上記性能評価４と同等構成を有する創傷部被覆シート１０１（第１開口部１１４の開口比率８０パーセント（Ｏｐｎ１）、第２開口部の開口比率１５パーセント（Ｏｐｎ２））のサンプル１を準備し、さらに比較例として、第１開口部および第２開口部の開口比率がいずれも４７．１パーセントの比較例１（Ｃｏｍｐａｒｅ１）、いずれも５７．５パーセントの比較例２（Ｃｏｍｐａｒｅ２）、いずれも３９．４パーセントの比較例３（Ｃｏｍｐａｒｅ３）、いずれも０．５パーセントの比較例４（Ｃｏｍｐａｒｅ４）を用い、第１層１１０に係る創傷部被覆面１１１の創傷部に対する静摩擦係数、および第２層１２０に係る二次ドレッシング材対向面１２２のおむつ１３０に対する静摩擦係数（図３も併せて参照）を計測評価した。静摩擦係数の測定に際しては、創傷部に見立てて人工皮革を用い、おむつ１３０の表面側、すなわち創傷部被覆シート１０１が当接する側にスパンボンド（目付２０ｇ／ｍ２）を用い、当該人工皮革およびおむつ１３０が乾燥した状態（Ｄｒｙ）および湿潤した状態（Ｗｅｔ）のそれぞれを測定した。測定には、新東科学株式会社（ＳＨＩＮＴＯ　Ｓｃｉｅｎｔｉｆｉｃ　Ｃｏ．Ｌｔｄ．）製のポータブル摩擦計ミューズを用いた。この結果を図１０に示す。 (Performance evaluation 5)
Next, performance evaluation 5 will be described. Sample 1 of wound covering sheet 101 (80% opening ratio of first opening 114 (Opn1), 15% opening ratio of second opening (Opn2)) having the same configuration as performance evaluation 4 is prepared as a sample. Further, as comparative examples, the first and second opening ratios are both 47.1 percent in Comparative Example 1 (Compare 1) and 57.5 percent in both Comparative Examples 2 (Compare 2). 39.4 percent of Comparative Example 3 (Compare 3), both using 0.5 percent of Comparative Example 4 (Compare 4), the static friction coefficient of the wound covering surface 111 of the first layer 110 with respect to the wound portion, and the second layer The static friction coefficient (refer also to FIG. 3) with respect to the diaper 130 of the secondary dressing material facing surface 122 according to 120 is measured. And value. In measuring the coefficient of static friction, artificial leather is used as a wound part, and a spunbond (20 g / m 2 basis weight) is used on the surface side of the diaper 130, that is, the side on which the wound part covering sheet 101 abuts. Each of the diaper 130 in a dry state (Dry) and a wet state (Wet) was measured. For the measurement, a portable tribometer muse manufactured by SHINTO Scientific Co. Ltd. was used. The result is shown in FIG.
図１０において符号Ｉは、創傷部被覆面１１１の創傷部に対する乾燥状態での静摩擦係数、符号ＩＩは、創傷部被覆面１１１の創傷部に対する湿潤状態での静摩擦係数、符号ＩＩＩは、二次ドレッシング材体構面１２２のおむつ１３０に対する乾燥状態での静摩擦係数、符号ＩＶは、二次ドレッシング材体構面１２２のおむつ１３０に対する湿潤状態での静摩擦係数をそれぞれ示している。 In FIG. 10, reference numeral I is a coefficient of static friction in the dry state of the wound covering surface 111 with respect to the wound part, reference numeral II is a coefficient of static friction in the wet state of the wound covering surface 111 with respect to the wound part, and reference numeral III is the secondary dressing The coefficient of static friction in the dry state of the material structure surface 122 with respect to the diaper 130, and the symbol IV indicate the coefficient of static friction in the wet state of the secondary dressing material structure surface 122 with respect to the diaper 130, respectively.
　図１０に示されるように、創傷部被覆面１１１に占める第１開口部１１４の開口比率が８０パーセントと相対的に大きく設定されたサンプル１は、他の比較例に比べて、乾燥状態および湿潤状態のいずれにおいても、創傷部被覆面１１１の創傷部に対する静摩擦係数が低減されるとともに、二次ドレッシング材対向面１２２のおむつ１３０に対する静摩擦係数は、更に相対的に小さな値を示している。従って、創傷部被覆シート１０１に外力が作用した場合であっても、創傷部被覆面１１１の静摩擦係数の絶対値が小さくされていることに起因して、創傷部に対する創傷部被覆面１１１の摩擦による悪影響を低減するとともに、二次ドレッシング材対向面１２２側の静摩擦係数が創傷部被覆面１１１側の静摩擦係数より相対的に小さく設定されることに起因して、創傷部被覆面１１１の創傷部への固定・被覆状態を保ったまま、相対的に静摩擦係数の小さい二次ドレッシング材対向面１２２がおむつ１３０に対して滑って摺動することになり、創傷部被覆面１１１が創傷部を擦って病状に悪影響を与えることを抑制することができる。 As shown in FIG. 10, the sample 1 in which the opening ratio of the first opening 114 occupying the wound covering surface 111 is set to a relatively large value of 80% is in a dry state and wet compared to the other comparative examples. In any of the states, the static friction coefficient of the wound covering surface 111 with respect to the wound portion is reduced, and the static friction coefficient of the secondary dressing material facing surface 122 with respect to the diaper 130 shows a relatively small value. Therefore, even when an external force is applied to the wound portion covering sheet 101, friction of the wound portion covering surface 111 against the wound portion is caused by the fact that the absolute value of the static friction coefficient of the wound portion covering surface 111 is reduced. The wound portion of the wound covering surface 111 is reduced because the static friction coefficient on the secondary dressing material facing surface 122 side is set to be relatively smaller than the static friction coefficient on the wound covering surface 111 side. The secondary dressing material facing surface 122 having a relatively small static friction coefficient slides and slides with respect to the diaper 130 while maintaining the fixed / covered state on the wound portion, and the wound portion covering surface 111 rubs the wound portion. Adversely affecting the medical condition.
　上記した本発明の特質に基づき、以下の各態様が構築される。
（態様１）
　液透過性の第１層と、前記第１層に重ねられた吸液性の第２層とを有する創傷部被覆材であって、
　前記第1層は、複数の孔が形成された多孔性シートによって構成されており、
当該多孔性シートは、創傷部を被覆する創傷部被覆面と、当該創傷部被覆面とは反対側において前記第２層に臨む第２層対向面とを有し、
前記第２層は、前記第１層に臨む第１層対向面と、当該第１層対向面とは反対側に形成されるとともに、当該創傷部被覆材を創傷部との間で受ける二次ドレッシング材に当接可能な二次ドレッシング材対向面とを有し、
前記二次ドレッシング材対向面の前記二次ドレッシング材に対する静摩擦係数が、前記創傷部被覆面の創傷部に対する静摩擦係数よりも小さく設定されていることを特徴とする創傷部被覆材。 Based on the characteristics of the present invention described above, the following aspects are constructed.
(Aspect 1)
A wound covering material having a liquid-permeable first layer and a liquid-absorbing second layer superimposed on the first layer,
The first layer is composed of a porous sheet in which a plurality of holes are formed,
The porous sheet has a wound portion covering surface that covers the wound portion, and a second layer facing surface that faces the second layer on the opposite side of the wound portion covering surface,
The second layer is formed on the first layer facing surface facing the first layer and on the opposite side of the first layer facing surface, and receives the wound covering material between the wound portion and the secondary layer. A secondary dressing material facing surface capable of contacting the dressing material;
The wound dressing material, wherein a static friction coefficient of the second dressing material facing surface with respect to the secondary dressing material is set to be smaller than a static friction coefficient with respect to the wound portion of the wound dressing surface.
（態様２）
前記多孔性シートにおける複数の孔のそれぞれは、前記創傷部被覆面に形成された第１開口部と、前記第２層対向面に形成された第２開口部とを有し、
  前記創傷部被覆面に占める前記第１開口部の開口比率が、前記第２層側対向面に占める前記第２開口部の開口比率よりも大きく設定されていることを特徴とする創傷部被覆材。 (Aspect 2)
Each of the plurality of holes in the porous sheet has a first opening formed in the wound covering surface and a second opening formed in the second layer facing surface,
Wound covering material characterized in that an opening ratio of the first opening occupying the wound covering surface is set larger than an opening ratio of the second opening occupying the second layer side facing surface. .
（態様３）
　態様１または２に記載の創傷部被覆材であって、前記第１層は、前記第２層と創傷部の間に介在して前記第２層が当該創傷部に直接当節することを回避するとともに、創傷部被覆材に外力が作用した場合に、前記第１層と創傷部との当接状態を維持しつつ、前記第２層と前記二次ドレッシング材との間に相対移動が生じるように構成されていることを特徴とする創傷部被覆材。 (Aspect 3)
3. The wound part covering material according to aspect 1 or 2, wherein the first layer is interposed between the second layer and the wound part to prevent the second layer from directly contacting the wound part. In addition, when an external force is applied to the wound covering material, a relative movement occurs between the second layer and the secondary dressing while maintaining the contact state between the first layer and the wound. It is comprised so that the wound part coating | covering material characterized by the above-mentioned.
（態様４）
　態様１から３までのいずれか１項に記載の創傷部被覆材であって、
前記前記創傷部被覆面対して所定の開口比率を有する前記第１開口部は、前記第２層における前記創傷部からの滲出液の吸液量を所定量に維持し、前記第２層側対向面に対して所定の開口比率を有する前記第２開口部は、前記第２層で保持された滲出液の前記創傷部側への漏出量を所定量に維持し、前記第１開口部による滲出液の吸液量が、前記第２開口部による滲出液の漏出量を上回るように設定されていることを特徴とする創傷部被覆材。 (Aspect 4)
The wound dressing material according to any one of aspects 1 to 3,
The first opening portion having a predetermined opening ratio with respect to the wound portion covering surface maintains a predetermined amount of exudate from the wound portion in the second layer, and is opposed to the second layer side. The second opening having a predetermined opening ratio with respect to the surface maintains a predetermined amount of leakage of the exudate held in the second layer to the wound portion side, and exudation by the first opening The wound covering material, wherein the liquid absorption amount is set so as to exceed the leakage amount of exudate from the second opening.
（態様５）
　態様１から４までのいずれかに記載の創傷部被覆材であって、
前記複数の孔のそれぞれは、前記第１開口部から前記第２開口部に向かうにつれて有効段面積が順次減少するように形成されていることを特徴とする創傷部被覆材。 (Aspect 5)
The wound dressing material according to any one of aspects 1 to 4,
Each of the plurality of holes is formed so that the effective step area decreases sequentially from the first opening toward the second opening.
（態様６）
態様１から５までのいずれか１項に記載の創傷部被覆材であって、
前記複数の孔のそれぞれは、前記第１開口部および第２開口部をそれぞれ底面および頂面とする略円錐形状に形成されていることを特徴とする創傷部被覆材。 (Aspect 6)
The wound dressing material according to any one of aspects 1 to 5,
Each of the plurality of holes is formed in a substantially conical shape having the first opening and the second opening as a bottom surface and a top surface, respectively.
（態様７）
　態様１から６までのいずれか１項に記載の創傷部被覆材であって、
　前記第１層は、前記第２層が吸液した滲出液を前記創傷部被覆面側に漏出する割合が略５パーセント以内となるように設定されていることを特徴とする創傷部被覆材。 (Aspect 7)
The wound dressing material according to any one of aspects 1 to 6,
The wound covering material according to claim 1, wherein the first layer is set so that the exudate absorbed by the second layer leaks to the wound covering surface side within approximately 5%.
（態様８）
　態様７に記載の創傷部被覆材であって、
　塩化ナトリウム０．９パーセント溶液５ミリリットルが前記第１層の創傷部被覆面を通じて前記第２層に供給されるとともに、前記創傷部被覆面に一平方センチメートル当たり５グラムの荷重が３分間作用した場合の漏出量が略０～０・１グラムの範囲内に抑制されることを特徴とする創傷部被覆材。 (Aspect 8)
The wound dressing material according to aspect 7,
When 5 ml of 0.9% sodium chloride solution is supplied to the second layer through the wound covering surface of the first layer, and a load of 5 grams per square centimeter is applied to the wound covering surface for 3 minutes. A wound covering material characterized in that a leakage amount is suppressed within a range of about 0 to 0.1 g.
（態様９）
　態様１から８までのいずれか１項に記載の創傷部被覆材であって、
　前記創傷部被覆面に占める前記第１開口部の開口比率が略５０～９０パーセントに設定されていることを特徴とする創傷部被覆材。 (Aspect 9)
The wound dressing material according to any one of aspects 1 to 8,
The wound covering material, wherein an opening ratio of the first opening to the wound covering surface is set to approximately 50 to 90%.
（態様１０）
　態様１から８までのいずれか１項に記載の創傷部被覆材であって、
　前記創傷部被覆面に占める前記第１開口部の開口比率が略７５～９５パーセントに設定されていることを特徴とする創傷部被覆材。 (Aspect 10)
The wound dressing material according to any one of aspects 1 to 8,
The wound covering material, wherein an opening ratio of the first opening to the wound covering surface is set to about 75 to 95 percent.
（態様１１）
　態様１から１０までのいずれか１項に記載の創傷部被覆材であって、
　前記第２層側対向面に占める前記第２開口部の開口比率が略３～５０パーセントに設定されていることを特徴とする創傷部被覆材。 (Aspect 11)
The wound dressing material according to any one of aspects 1 to 10,
The wound covering material, wherein an opening ratio of the second opening occupying the second layer side facing surface is set to approximately 3 to 50%.
（態様１２）
　態様１から１０までのいずれか１項に記載の創傷部被覆材であって、
　前記第２層側対向面に占める前記第２開口部の開口比率が略３～２０パーセントに設定されていることを特徴とする創傷部被覆材。 (Aspect 12)
The wound dressing material according to any one of aspects 1 to 10,
The wound covering material, wherein an opening ratio of the second opening occupying the second layer side facing surface is set to approximately 3 to 20 percent.
（態様１３）
　態様１から１２までのいずれか１項に記載の創傷部被覆材であって、
　前記第１層の見かけ上の厚みが略０．１～１．２ミリメートルに設定されていることを特徴とする創傷部被覆材。 (Aspect 13)
The wound dressing material according to any one of aspects 1 to 12,
The wound covering material, wherein the apparent thickness of the first layer is set to approximately 0.1 to 1.2 millimeters.
（態様１４）
　態様１から１３までのいずれか１項に記載の創傷部被覆材であって、
　前記第１層の創傷部被覆面から、前記第２層における前記第１層と反対側面への通気抵抗値が０．１Ｋs・ｓ／ｍ以下となるように設定されていることを特徴とする創傷部被覆材。 (Aspect 14)
The wound dressing material according to any one of aspects 1 to 13,
The airflow resistance value from the wound part covering surface of the first layer to the side surface opposite to the first layer in the second layer is set to be 0.1 Ks · s / m or less. Wound covering material.
（態様１５）
　請求項１～１４までのいずれか１項に記載の創傷部被覆材であって、
　前記二次ドレッシング材には、創傷部被覆材載置面が形成されていることを特徴とする創傷部被覆材。 (Aspect 15)
The wound dressing according to any one of claims 1 to 14,
The wound dressing material, wherein the secondary dressing material has a wound dressing placement surface.
（態様１６）
　態様１から１５までのいずれか１項に記載の創傷部被覆材であって、
　前記二次ドレッシング材がおむつであることを特徴とする創傷部被覆材。
 
(Aspect 16)
The wound dressing material according to any one of aspects 1 to 15,
The wound dressing material, wherein the secondary dressing material is a diaper.

１…肌面
２…創傷部
１０１…創傷部被覆シート（創傷部被覆材）
１１０…第１層
１１０ａ…多孔性シート                
１１１…創傷部被覆面
１１２…第２層対向面
１１３…孔
１１４…第１開口部
１１５…第２開口部
１２０…第２層
１２１…第１層対向面
１２２…二次ドレッシング材対向面
１３０…おむつ（二次ドレッシング材）
１３１…創傷部被覆材載置面 DESCRIPTION OF SYMBOLS 1 ... Skin surface 2 ... Wound part 101 ... Wound part coating sheet (wound part coating | covering material)
110 ... first layer 110a ... porous sheet
111 ... Wound covering surface 112 ... Second layer facing surface 113 ... Hole 114 ... First opening 115 ... Second opening 120 ... Second layer 121 ... First layer facing surface 122 ... Secondary dressing material facing surface 130 ... Diapers (secondary dressing material)
131 ... Wound covering material placement surface

Claims (6)

  1. 　液透過性の第１層と、前記第１層に重ねられた吸液性の第２層とを有する創傷部被覆材であって、
    　前記第1層は、複数の孔が形成された多孔性シートによって構成されており、
    当該多孔性シートは、創傷部を被覆する創傷部被覆面と、当該創傷部被覆面とは反対側において前記第２層に臨む第２層対向面とを有し、
    前記第２層は、前記第１層に臨む第１層対向面と、当該第１層対向面とは反対側に形成されるとともに、当該創傷部被覆材を創傷部との間で受ける二次ドレッシング材に当接可能な二次ドレッシング材対向面とを有し、
    前記二次ドレッシング材対向面の前記二次ドレッシング材に対する静摩擦係数が、前記創傷部被覆面の創傷部に対する静摩擦係数よりも小さく設定されていることを特徴とする創傷部被覆材。     A wound covering material having a liquid-permeable first layer and a liquid-absorbing second layer superimposed on the first layer,
    The first layer is composed of a porous sheet in which a plurality of holes are formed,
    The porous sheet has a wound portion covering surface that covers the wound portion, and a second layer facing surface that faces the second layer on the opposite side of the wound portion covering surface,
    The second layer is formed on the first layer facing surface facing the first layer and on the opposite side of the first layer facing surface, and receives the wound covering material between the wound portion and the secondary layer. A secondary dressing material facing surface capable of contacting the dressing material;
    The wound dressing material, wherein a static friction coefficient of the second dressing material facing surface with respect to the secondary dressing material is set to be smaller than a static friction coefficient with respect to the wound portion of the wound dressing surface.
  2. 請求項１に記載の創傷部被覆材であって、
    前記多孔性シートにおける複数の孔のそれぞれは、前記創傷部被覆面に形成された第１開口部と、前記第２層対向面に形成された第２開口部とを有し、
      前記創傷部被覆面に占める前記第１開口部の開口比率が、前記第２層側対向面に占める前記第２開口部の開口比率よりも大きく設定されていることを特徴とする創傷部被覆材。     The wound dressing according to claim 1, wherein
    Each of the plurality of holes in the porous sheet has a first opening formed in the wound covering surface and a second opening formed in the second layer facing surface,
    Wound covering material characterized in that an opening ratio of the first opening occupying the wound covering surface is set larger than an opening ratio of the second opening occupying the second layer side facing surface. .
  3. 　請求項１または２に記載の創傷部被覆材であって、前記第１層は、前記第２層と創傷部の間に介在して前記第２層が当該創傷部に直接当節することを回避するとともに、創傷部被覆材に外力が作用した場合に、前記第１層と創傷部との当接状態を維持しつつ、前記第２層と前記二次ドレッシング材との間に相対移動が生じるように構成されていることを特徴とする創傷部被覆材。 The wound part covering material according to claim 1 or 2, wherein the first layer is interposed between the second layer and the wound part, and the second layer directly contacts the wound part. While avoiding and when an external force is applied to the wound covering material, the relative movement between the second layer and the secondary dressing material is maintained while maintaining the contact state between the first layer and the wound portion. A wound dressing characterized in that it is configured to occur.
  4. 　請求項１から３までのいずれか１項に記載の創傷部被覆材であって、
    　前記創傷部被覆面に占める前記第１開口部の開口比率が略７５～９５パーセントに設定されていることを特徴とする創傷部被覆材。     The wound dressing material according to any one of claims 1 to 3,
    The wound covering material, wherein an opening ratio of the first opening to the wound covering surface is set to about 75 to 95 percent.
  5. 　請求項１～４までのいずれか１項に記載の創傷部被覆材であって、
    　前記二次ドレッシング材には、創傷部被覆材載置面が形成されていることを特徴とする創傷部被覆材。     The wound dressing material according to any one of claims 1 to 4,
    The wound dressing material, wherein the secondary dressing material has a wound dressing placement surface.
  6. 　請求項１から５までのいずれか１項に記載の創傷部被覆材であって
    　前記二次ドレッシング材がおむつであることを特徴とする創傷部被覆材。     The wound dressing material according to any one of claims 1 to 5, wherein the secondary dressing material is a diaper.
PCT/JP2013/054831 2012-02-28 2013-02-25 Wound covering material WO2013129344A1 (en)

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JP2012-042547 2012-02-28

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JP6293500B2 (en) * 2014-01-27 2018-03-14 花王株式会社 Method for evaluating the degree of occurrence of redness of the skin at the site where the absorbent article is worn
JP2020000488A (en) * 2018-06-28 2020-01-09 小林製薬株式会社 Pad material for body fluid absorption
JP6912129B2 (en) * 2019-11-08 2021-07-28 義▲徳▼ 中村 Local friction slip mitigation sheet and local friction slip mitigation method

Citations (4)

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JP2005506149A (en) * 2001-10-26 2005-03-03 エスシーエー・ハイジーン・プロダクツ・アーベー Inserts for absorbent articles having skin care agents and spacing sheets
US7345215B2 (en) * 2003-12-22 2008-03-18 Sca Hygiene Products Ab Absorbent product with low friction zone
JP2011167412A (en) * 2010-02-19 2011-09-01 Unicharm Corp Disposable wearing article
WO2011152368A1 (en) * 2010-06-01 2011-12-08 株式会社瑞光 Surface sheet for wound dressing and wound dressing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005506149A (en) * 2001-10-26 2005-03-03 エスシーエー・ハイジーン・プロダクツ・アーベー Inserts for absorbent articles having skin care agents and spacing sheets
US7345215B2 (en) * 2003-12-22 2008-03-18 Sca Hygiene Products Ab Absorbent product with low friction zone
JP2011167412A (en) * 2010-02-19 2011-09-01 Unicharm Corp Disposable wearing article
WO2011152368A1 (en) * 2010-06-01 2011-12-08 株式会社瑞光 Surface sheet for wound dressing and wound dressing

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