Foam dressing for pressure injury

Abstract

The utility model discloses a foam dressing for pressure injury, which belongs to the field of dressings and sequentially comprises a non-woven fabric layer, a foam layer, a gel ointment mixing layer and a sealing layer from bottom to top. The gel and ointment mixing layers are formed by combining colloids and carriers, the gel and ointment mixing layers are arranged on the surface of the foam layer and are distributed in an array mode, and adjacent gel and ointment mixing layers form channels for air to flow in the same plane; the sealing layer is arranged on the upper surface of the gel ointment mixing layer. The whole gel and ointment mixing layer is distributed in a honeycomb shape through the channels, is more breathable and has a certain buffering force effect; the foam layer has the effects of relieving pressure of local skin and tissue and absorbing tissue secretion.

Description

Technical Field

[0001] The utility model relates to a dressing, in particular to a foam dressing for pressure injuries. Background Art

[0002] Pressure sores, also known as pressure ulcers and bedsores, are common chronic and difficult-to-heal wounds in clinical practice, and are more common in patients who are bedridden or in wheelchairs for a long time.

[0003] Pressure sore refers to a disease caused by local tissue compression, blood circulation disorder, local continuous ischemia, hypoxia, malnutrition, and soft tissue ulceration and necrosis. It is also called bedsore. It is more common in middle-aged and elderly people who are bedridden. It usually undergoes three pathological changes: erythema, blisters, and ulcers. Specifically:

[0004] Stage 1: Non-blanchable erythema with intact skin. The skin is intact and a non-blanchable erythema appears. Darker skin may show different symptoms. The blanchable erythema or changes in sensation, skin temperature, or firmness may appear before the skin changes are observed. Color changes in this stage do not include purple or maroon changes, as these color changes may indicate deep tissue damage.

[0005] Stage 2: Partial-thickness skin loss with exposed dermis. Partial-thickness skin loss with exposed dermis. The wound bed is active, pink or red, moist, and may present as intact or broken serous blisters. Fat and underlying tissue are not exposed. No granulation tissue, slough, or eschar. Injuries at this stage are often caused by disruption of the pelvic skin microclimate and shear forces, as well as shear forces on the heel. This stage should not be used to describe moisture-related skin injuries, such as incontinence dermatitis, fold dermatitis, medical adhesive-related skin injuries, or traumatic wounds (skin avulsions, burns, abrasions).

[0006] Stage 3: Full-thickness skin loss. Full-thickness skin loss, often with fat, granulation tissue, and involuted edges. Slough and / or eschar may be present. The depth of tissue loss varies with the anatomic location; deep wounds may develop in areas of high fat content. Undermining or sinus tracts may be present. No fascia, muscle, tendon, ligament, cartilage, and / or bone are exposed. If slough or eschar obscures the depth of tissue loss, this is an unstageable pressure injury.

[0007] Stage 4: Full-thickness skin and tissue loss. Full-thickness skin and tissue loss with visible or directly palpable fascia, muscle, tendon, ligament, cartilage, or bone. Slough and / or eschar are visible. Involuted edges, sinus tracts, and / or undermining are common. The depth of tissue loss varies with the anatomic location. If slough or eschar obscures the depth of tissue loss, it is an unstageable pressure injury.

[0008] Unstageable: Full-thickness skin and tissue loss, the extent of the injury is obscured. Full-thickness skin and tissue loss, the extent of tissue loss cannot be determined because it is obscured by slough and / or eschar. Only when enough slough and / or eschar is removed can the injury be determined to be stage 3 or 4. Stable eschar (appears as dry, tightly adherent, intact without erythema and fluctuance) on ischemic extremities or heels should not be removed.

[0009] Deep Tissue Injury: Persistent nonblanchable dark red, maroon, or purple color. A persistent nonblanchable dark red, maroon, or purple color or epidermal separation of intact or broken skin with a black wound bed or blood-filled blister. Pain and temperature changes usually precede color changes. Color may vary in darker skin. This injury results from intense and / or prolonged pressure and shear forces at the bone-muscle interface. Wounds at this stage may progress rapidly to reveal the actual extent of tissue loss or may resolve without tissue loss. If necrotic tissue, subcutaneous tissue, granulation tissue, fascia, muscle, or other deeper structures are visible, this is a full-thickness pressure injury (Unstageable, Stage 3, or Stage 4). This stage is not used to describe vascular, traumatic, neuropathic wounds, or skin disorders.

[0010] At present, there is a lack of effective treatment drugs for pressure sores. The present invention controls pressure sores in stages 1 to 3. The foam dressings commonly used locally in the prior art are basically composed of a foam absorption layer, a water-blocking layer, an anti-adhesion layer, and a peeling protection layer. This design is used to absorb exudate and relieve self-weight pressure in the case of skin ulceration accompanied by exudate, but the pressure sore has not ruptured in the early stage of formation, and the foam dressing cannot promote local blood circulation. The most important thing is the ruptured pressure sore wound. The application of polyurethane foam dressings only keeps the wound moist and seals the wound to prevent infection. Clinically, no significant improvement or healing effect has been found. The occurrence of pressure sores is a combination of changes in the perfusion, microenvironment, and nutrition of the local skin and subcutaneous muscle layer caused by local pressure. Relieving pressure does not mean improving the perfusion, microenvironment, and nutrition of the local skin and subcutaneous muscle layer; therefore, a foam dressing with a therapeutic effect, more reasonable distribution, better air permeability, and a certain buffering effect is needed. Utility Model Content

[0011] The utility model aims to provide a foam dressing for pressure injuries, which has the advantages of good air permeability, reasonable distribution and buffering.

[0012] The above technical purpose of the utility model is achieved through the following technical solutions: a pressure injury foam dressing, which comprises, from bottom to top, a non-woven fabric layer, a foam layer, a gel ointment mixed layer and a sealing layer;

[0013] The non-woven fabric layer serves as a base to connect the foam layer and the gel paste layer;

[0014] The foam layer is a hydrophilic polyurethane foam, the bottom of the foam layer is connected to the top of the non-woven fabric layer, and the foam layer is evenly distributed on the upper surface of the non-woven fabric layer;

[0015] The gel ointment mixed layer is composed of a colloid and a carrier, and the gel ointment mixed layer is arranged on the surface of the foam layer and distributed in an array, and a channel for air flow is formed between adjacent gel ointment mixed layers on the same plane;

[0016] The sealing layer is arranged on the upper surface of the gel ointment mixed layer.

[0017] Preferably, the carrier comprises a leachate, powder or granules.

[0018] By adopting the above technical scheme, the carrier can be mixed with the colloid and the internal components of the carrier can be released when in contact with the skin.

[0019] Preferably, the colloid comprises aloe vera gel.

[0020] By adopting the above technical solution, it has the effects of reducing swelling and relieving pain, promoting local blood circulation, and promoting the growth and metabolism of local skin and subcutaneous muscle layer.

[0021] Preferably, the carrier includes Codonopsis pilosula, cinnamon twig, rhubarb, liquorice, white peony root, schizonepeta, mint, angelica dahurica, chrysanthemum, forsythia, viola yedoensis, dandelion, isatis indigotica, phellodendron, spatholobi, bletilla striata, wormwood, corydalis, frankincense, myrrh, safflower, sappan wood, dragon's blood, millettia reticulata, catechu, leech and borneol.

[0022] Preferably, the foam layer has a thickness of 0.2 cm-0.5 cm.

[0023] By adopting the above technical solution, the thickness has a better supporting effect.

[0024] Preferably, the gel ointment mixed layer is evenly distributed on the surface of the foam layer in a hexagonal shape.

[0025] By adopting the above technical solution, mutually connected channels are formed to provide air flow.

[0026] Preferably, the channel evenly divides the gel-ointment mixed layer into a honeycomb shape on a horizontal plane.

[0027] By adopting the above technical solution, the channel can be formed by die pressing or rolling.

[0028] Preferably, the foam layer and the gel ointment mixed layer are hexagonal in shape.

[0029] By adopting the above technical solution, the structure of the foam layer and the structure of the gel ointment mixed layer are both hexagonal and correspond to each other in the height direction.

[0030] To sum up, the key to pressure sores is prevention, and pressure injury foam dressings are used in the early stages of pressure sores or first-stage pressure sores. The entire gel-ointment mixed layer is distributed in a honeycomb shape through the channels, which is more breathable and has a certain buffering effect; the foam layer and the gel-ointment mixed layer can relieve local pressure while having multiple effects of reducing swelling and relieving pain, promoting local blood circulation, and promoting the growth and metabolism of local skin and subcutaneous muscle layers; at the same time, the combination of colloid and carrier substance has a stronger buffering effect than the foam dressings in the prior art, and the foam layer plays the role of connecting the gel-ointment mixed layer. At the same time, depending on the different carrier substances, the treatment of pressure sores can have a more targeted effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional schematic diagram of Example 1;

[0032] Figure 2 is a top view of Example 1;

[0033] Figure 3 is a cross-sectional schematic diagram of Example 2;

[0034] In the figure, 1, non-woven fabric layer; 2, foam layer; 3, gel ointment mixed layer; 31, channel; 4, sealing layer. DETAILED DESCRIPTION

[0035] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0037] Embodiment 1:

[0038] like Figure 1 and Figure 2 As shown, a pressure injury foam dressing comprises, from bottom to top, a non-woven fabric layer 1, a foam layer 2, a gel-ointment mixed layer 3 and a sealing layer 4; wherein the non-woven fabric layer 1 mainly serves as ventilation of the side of the foam dressing away from the skin, the foam layer 2 serves as a single buffer, the gel-ointment mixed layer 3 not only serves as a carrier substance release function, but also serves as a double buffer function, and at the same time, through the viscosity of the colloid, the dressing is connected to the skin, and the channel 31 arranged on the surface of the gel-ointment mixed layer 3 serves as ventilation of the side in contact with the skin.

[0039] like Figure 1 As shown, the non-woven fabric layer 1 serves as a base to connect the foam layer 2 and the gel paste layer. The non-woven fabric layer 1 may protrude from the side of the foam layer 2 on the orthographic projection plane. The thickness of the non-woven fabric layer 1 is 0.1mm-2mm, and the surface of the non-woven fabric layer 1 has through holes to provide ventilation.

[0040] like Figure 1 As shown, the foam layer 2 is a hydrophilic polyurethane foam, the thickness of the foam layer 2 is 0.2cm-0.5cm, the bottom of the foam layer 2 is connected to the top of the non-woven fabric layer 1, and the foam layer 2 is evenly distributed on the upper surface of the non-woven fabric layer 1. The hydrophilic polyurethane foam can also be replaced by other foam materials with a cushioning effect.

[0041] The gel ointment mixed layer 3 is composed of a colloid and a carrier that can reduce swelling and relieve pain, promote blood circulation and remove blood stasis, promote blood circulation and promote the growth and metabolism of local soft tissues. The carrier can be an extract, or it can be a powder or granules. There are many ways to combine them. The powdered carrier can be attached to the surface of the colloid, the powdered and granular carriers can fill the channel 31, or the powdered or granular or extracted carrier can be mixed with the colloid. The colloid can be silica gel or aloe vera gel, preferably aloe vera gel, which has a better effect of reducing swelling and relieving pain.

[0042] The carrier includes the following components by weight: 6-12 parts of Codonopsis pilosula, 1-4.5 parts of cinnamon twig, 3-300 parts of rhubarb, 1.5-9 parts of liquorice, 6-15 parts of white peony root, 4.5-9 parts of schizonepeta, 3-6 parts of mint, 3-9 parts of angelica, 4.5-9 parts of chrysanthemum, 6-15 parts of forsythia, 5-30 parts of Viola yedoensis, 9-15 parts of dandelion, 9-15 parts of isatis indigotica , 3-12 parts of Phellodendron chinense, 3-12 parts of Sargentodoxa chinensis, 6-15 parts of Bletilla striata, 3-9 parts of Artemisia argyi, 3-9 parts of Corydalis yanhusuo, 3-9 parts of frankincense, 3-9 parts of myrrh, 3-9 parts of safflower, 3-9 parts of Sappanwood, 1-15 parts of Sanguisorba officinalis, 9-15 parts of Millettia reticulata, 1-15 parts of catechu, 1-15 parts of leech, 0.1-0.3 parts of borneol, and 150-850 parts of aloe vera gel.

[0043] Preparation and implementation method: Weigh 9g of Codonopsis pilosula, 3g of cinnamon twig, 30g of rhubarb, 9g of liquorice, 9g of white peony root, 6g of schizonepeta, 6g of mint, 6g of angelica dahurica, 6g of chrysanthemum, 9g of forsythia, 15g of Viola yedoensis, 9g of dandelion, 12g of isatis indigotica, 9g of phellodendron, 9g of spatholobi, 9g of bletilla striata, 6g of wormwood, 6g of Corydalis yanhusuo, 6g of frankincense, 6g of myrrh, 6g of safflower, 6g of sophora japonica, 9g of blood clotting, 12g of Millettia spatholobi, 9g of catechu, 6g of leech, 0.3g of borneol, and 500g of aloe vera gel for later use.

[0044] The above-mentioned codonopsis, cinnamon twig, rhubarb, liquorice, white peony root, schizonepeta, mint, angelica dahurica, chrysanthemum, forsythia, viola yedoensis, dandelion, isatis indigotica, phellodendron, spatholobi, bletilla striata, wormwood, corydalis, frankincense, myrrh, safflower, sappan wood, dragon's blood, millettia, catechu, leech, add 8 times the amount of water, boil for 1 hour, and filter; add 6 times the amount of water to the filter residue, boil for half an hour, and filter; add 4 times the amount of water to the filter residue, boil for half an hour, and filter; combine the filtrate, concentrate, dry and mix into aloe vera gel.

[0045] The gel ointment mixing layer 3 is arranged on the surface of the foam layer 2 and distributed in an array. A channel 31 for air flow is formed between adjacent gel ointment mixing layers 3 in the same plane. The gel ointment mixing layer 3 is evenly distributed on the surface of the foam layer 2 in a hexagonal shape. The channel 31 evenly divides the gel ointment mixing layer 3 into a honeycomb shape on the horizontal plane.

[0046] The sealing layer 4 is arranged on the upper surface of the gel-ointment mixed layer 3. The sealing layer 4 and the lower sealing layer 5 are both plastic films. The sealing layer 4 is bonded on the non-woven fabric layer 1. When in use, the sealing layer 4 is torn off, and then the gel-ointment mixed layer 3 is attached to the wound.

[0047] Case 1: Zhang, male, 82 years old, was bedridden during the recovery period after hip replacement. Pressure injury occurred about 4 cm from the anus to the left buttocks of the sacrum and coccyx, with a range of 2 cm × 2 cm, stage 1. After disinfecting the wound, the gel foam excipient of the present invention was administered, and the dressing was changed once a day. The wound healing was observed. From the second to the sixth day, it was observed that the wound swelled and scabs formed, and no purulent secretions were exuded; on the seventh day, the scabs fell off by themselves, and the surface was flat and without boundaries.

[0048] Case 2: Peng, male, 84 years old, was bedridden for a long time after cerebral infarction, with multiple pressure injuries in the sacral coccyx, stage 2. After cleaning the wound, the gel foam excipient of the present invention was given, and the dressing was changed once a day. The wound healing was observed. On the third and fifth days, the wound was obviously swollen, healed and scabbed, and no purulent secretions were exuded; on the seventh day, the scab fell off by itself, and the surface was flat and without boundaries.

[0049] Case 3: Chen, female, 80 years old, was bedridden due to left hemiplegia after cerebral infarction. Pressure injury occurred in the posterior part of the left lower limb, with a range of 3cm×2cm, stage 2. After disinfection and cleaning of the wound, the gel foam excipient of the present invention was administered, and the dressing was changed once a day. The wound healing was observed. On the third and fifth days, the wound was obviously healed and scabbed, and no purulent secretions were exuded; on the seventh day, the scab fell off by itself, and the surface was flat and without boundaries.

[0050] Case 4: Zhu, male, 87 years old, long-term bedridden after cerebral infarction, sacral coccyx 10cm×14cm, stage 2. After disinfection and cleaning of the wound, the gel foam excipient of the present invention was given, and the dressing was changed once a day. The wound healing was observed. On the third, fifth, seventh and ninth days, the redness and swelling around the wound significantly subsided, the wound healed and scab formed, and no purulent secretion oozed; on the eleventh day, the scab fell off by itself, and the surface was flat and borderless.

[0051] Case 5: Ju Moumou, female, 84 years old, long-term bedridden after cerebral infarction, sacral coccyx 3cm×2cm, stage 2. After disinfection and cleaning of the wound, the gel foam excipient of the present invention was given, and the dressing was changed once a day. The wound healing was observed. On the third and fifth days, the redness and swelling around the wound surface significantly subsided, the wound surface healed and scab formed, and no purulent secretion exuded; on the ninth day, the scab was completely formed, and the edge had fallen off by itself, and the surface of the fallen part was flat.

[0052] Embodiment 2:

[0053] like Figure 3 As shown, the difference between Example 1 and Example 2 is that the structure of the foam layer 2 is different. The foam layer 2 corresponds to the gel ointment mixed layer 3 and both are hexagonal, that is, the structure of the channel 31 penetrates the surface of the non-woven fabric layer 1, increasing the depth of the channel 31 and improving the overall breathability effect.

Claims

1. A foam dressing for pressure injuries, characterized in that: It comprises, from bottom to top, a non-woven fabric layer (1), a foam layer (2), a gel ointment mixed layer (3) and a sealing layer (4); The non-woven fabric layer (1) serves as a base and plays a role in connecting the foam layer (2) and the gel paste layer; The foam layer (2) is a hydrophilic polyurethane foam, the bottom of the foam layer (2) is connected to the top of the non-woven fabric layer (1), and the foam layer (2) is evenly distributed on the upper surface of the non-woven fabric layer (1); The gel ointment mixed layer (3) is composed of a colloid and a carrier, and the gel ointment mixed layer (3) is arranged on the surface of the foam layer (2) and distributed in an array, and a channel (31) for air flow is formed between adjacent gel ointment mixed layers (3) on the same plane; The sealing layer (4) is arranged on the upper surface of the gel ointment mixed layer (3).

2. A pressure injury foam dressing according to claim 1, characterized in that: The carrier includes a leachate or a powder or a granule.

3. A pressure injury foam dressing according to claim 2, characterized in that: The colloid includes aloe vera gel.

4. The pressure injury foam dressing according to claim 1, characterized in that: The thickness of the foam layer (2) is 0.2 cm-0.5 cm.

5. The pressure injury foam dressing according to claim 1, characterized in that: The gel ointment mixed layer (3) is evenly distributed on the surface of the foam layer (2) in a hexagonal shape.

6. A pressure injury foam dressing according to claim 5, characterized in that: The channels (31) evenly divide the gel ointment mixed layer (3) into a honeycomb shape on a horizontal plane.

7. The pressure injury foam dressing according to claim 5, characterized in that: The foam layer (2) and the gel ointment mixed layer (3) are correspondingly hexagonal.

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