Novel dressing capable of prompting replacement

Abstract

The novel dressing capable of prompting replacement comprises a sponge layer, the sponge layer transits from a first surface to a second surface in the thickness direction of the sponge layer, a plurality of through holes are formed in the sponge layer, and the two ends of each through hole penetrate through the first surface and the second surface respectively. Wherein the inner diameter of the first end, located on the first surface, in the through hole is larger than the inner diameter of the second end, located on the second surface, in the through hole; the indicating color-changing layer is connected with the second surface of the sponge layer; wherein the first surface of the sponge layer is attached to the surface of a wound of a patient, percolate of the wound of the patient can be absorbed by the sponge layer and flow along the through holes, and the color changing layer can change color when making contact with the percolate. According to the dressing, exudate exuding from a wound of a patient is absorbed by utilizing the sponge layer, and meanwhile, the exudate can flow along the through holes in the sponge layer to indicate the color-changing layer based on the capillary action. Therefore, when the exudate is much and the sponge layer absorbs the exudate to be saturated, the exudate is in contact with the indicating color-changing layer to change the color of the indicating color-changing layer, and the effect of prompting medical workers to replace dressing is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical products, and in particular to a new type of dressing capable of prompting replacement. Background Art

[0002] After the operation is completed, the wound on the patient's surface needs to be covered with a dressing to assist wound healing. Generally, the dressing is infiltrated into a breathable gauze or sponge, and then the gauze or sponge is attached to the patient's wound surface using tape. Over time, the exudate from the wound will be absorbed by the dressing, thereby accelerating wound healing.

[0003] Most dressings on the market currently use polyvinyl alcohol compressed sponges. Although this type of sponge is easy to prepare, low in cost, and has certain physical and chemical stability, it still has a lot of room for improvement in terms of biocompatibility, adhesion, mechanical property regulation, and water retention capacity. Moreover, most of these dressings do not have an intuitive usage indication function, and the status of the dressing cannot be directly observed. The user's intuition is often used to determine when to change the dressing. If the dressing is changed too early, it is undoubtedly a waste if it is not yet saturated with absorption; if it is changed too late, the dressing has already been saturated with absorption. If the exudate that cannot be absorbed is deposited on the wound surface, it will provide a good growth environment for bacteria and other microorganisms, which can easily cause wound infection. Furthermore, if the exudate continues to accumulate, leakage will occur, aggravating the damage to the wound surface.

[0004] Therefore, there is an urgent need for a dressing that can remind medical staff to change the dressing in time, so as to avoid the dressing being replaced prematurely due to incomplete absorption, and to avoid the dressing being oversaturated with exudate and causing the exudate to leak out of the dressing. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a device that can prompt the replacement of a new dressing and can prompt the use of the current dressing, thereby reminding medical staff to replace the dressing in time to avoid waste of the dressing or long-term deposition of dressing exudate on the wound surface to cause wound infection.

[0006] According to an embodiment of the present invention, the method of prompting to replace a new dressing includes:

[0007] A sponge layer, wherein the sponge layer transitions from the first surface to the second surface along the thickness direction thereof, wherein a plurality of through holes are arranged in the sponge layer, and two ends of the through holes respectively penetrate to the first surface and the second surface, wherein the inner diameter of the first end of the through hole located on the first surface is greater than the inner diameter of the second end of the through hole located on the second surface;

[0008] an indicating color-changing layer, the indicating color-changing layer being connected to the second surface of the sponge layer;

[0009] The first surface of the sponge layer is used to adhere to the surface of the patient's wound. The exudate from the patient's wound can be absorbed by the sponge layer and flow along the through hole to the indicator color-changing layer. The indicator color-changing layer can change color when in contact with the exudate.

[0010] The new dressing that can be replaced according to the embodiment of the present invention has at least the following beneficial effects: while the sponge layer absorbs the exudate from the patient's wound, the exudate can also flow to the indicator color-changing layer along the through holes in the sponge layer based on the capillary action. Therefore, when the exudate is large and the sponge layer is saturated with the exudate, the exudate contacts the indicator color-changing layer to change its color, which serves to remind medical staff to change the dressing.

[0011] According to some embodiments of the present invention, the sponge layer is specifically a composite sponge layer of polyvinyl alcohol and gelatin.

[0012] According to some embodiments of the present invention, the molecular weight of the polyvinyl alcohol is 85,000 to 125,000, and the gelatin is specifically pig skin gelatin.

[0013] According to some embodiments of the present invention, the weight ratio of the polyvinyl alcohol to the gelatin is between 2:1 and 4:1.

[0014] According to some embodiments of the present invention, the first surface of the sponge layer is provided with a pressure-sensitive adhesive for adhering to the wound surface of the patient.

[0015] According to some embodiments of the present invention, an inner diameter of the through hole gradually decreases from a first end to a second end of the through hole.

[0016] According to some embodiments of the present invention, the indicating color-changing layer is doped with water-soluble color powder, and the water-soluble color powder changes color when it comes into contact with exudate from the patient's wound.

[0017] According to some embodiments of the present invention, the thickness of the sponge layer is 2 to 6 mm.

[0018] According to some embodiments of the present invention, the thickness of the indicating color-changing layer is 0.5 to 1 mm.

[0019] According to some embodiments of the present invention, the dressing that can prompt the replacement of a new type also includes a microporous filtration membrane, which is arranged between the second surface of the sponge layer and the indicator color change layer, and the microporous filtration membrane is used to filter impurities in the exudate.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 A three-dimensional diagram that can prompt the replacement of a new dressing according to an embodiment of the present invention;

[0023] Figure 2 A three-dimensional cross-sectional view of an embodiment of the present invention that can prompt the replacement of a new dressing;

[0024] Figure 3 This is a side cross-sectional view of an embodiment of the present invention that can prompt the replacement of a new dressing.

[0025] Reference numerals: 100 - sponge layer, 110 - first surface, 120 - second surface, 130 - through hole, 200 - color-changing indicator layer, 300 - microporous filter membrane. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] After the operation is completed, the wound on the patient's surface needs to be covered with a dressing to assist wound healing. Generally, the dressing is infiltrated into a breathable gauze or sponge, and then the gauze or sponge is attached to the patient's wound surface using tape. Over time, the exudate from the wound will be absorbed by the dressing, thereby accelerating wound healing.

[0032] Most dressings on the market currently use polyvinyl alcohol compressed sponges. Although this type of sponge is easy to prepare, low in cost, and has certain physical and chemical stability, it still has a lot of room for improvement in terms of biocompatibility, adhesion, mechanical property regulation, and water retention capacity. Moreover, most of these dressings do not have an intuitive usage indication function, and the status of the dressing cannot be directly observed. The user's intuition is often used to determine when to change the dressing. If the dressing is changed too early, it is undoubtedly a waste if it is not yet saturated with absorption; if it is changed too late, the dressing has already been saturated with absorption. If the exudate that cannot be absorbed is deposited on the wound surface, it will provide a good growth environment for bacteria and other microorganisms, which can easily cause wound infection. Furthermore, if the exudate continues to accumulate, leakage will occur, aggravating the damage to the wound surface.

[0033] Therefore, there is an urgent need for a dressing that can remind medical staff to change the dressing in time, so as to avoid the dressing being replaced prematurely due to incomplete absorption, and to avoid the dressing being oversaturated with exudate and causing the exudate to leak out of the dressing.

[0034] The present application proposes a new type of dressing that can prompt the replacement of the dressing. While the sponge layer 100 absorbs the exudate from the patient's wound, based on the capillary action, the exudate can also flow to the indicator color-changing layer 200 along the through holes 130 in the sponge layer 100. Therefore, when the exudate is large and the sponge layer 100 is saturated with the exudate, the exudate contacts the indicator color-changing layer 200 to change its color, which plays the role of prompting medical staff to change the dressing.

[0035] Reference Figure 1, the embodiment of the present application can prompt the replacement of a new dressing, including a sponge layer 100 and an indicator color-changing layer 200. The sponge layer 100 is in direct contact with the patient's wound, and the exudate flowing out of the patient's wound can be absorbed by the sponge layer 100, thereby preventing a large amount of exudate from being deposited in the wound and affecting the healing of the wound or causing infection. The indicator color-changing layer 200 is connected to the sponge layer 100. When the exudate flowing out of the wound is too much and the sponge layer 100 is saturated with it, part of the exudate can flow to the indicator color-changing layer 200 and contact it, causing the indicator color-changing layer 200 to change color, thereby reminding medical staff to replace the saturated dressing in time, and avoid the exudate being deposited in the wound because the sponge layer 100 can no longer absorb the exudate.

[0036] Specifically, refer to Figure 2 and Figure 3 The sponge layer 100 is formed along its thickness direction (along Figure 3 The sponge layer 100 is provided with a plurality of through holes 130, and the two ends of the through holes 130 are respectively connected to the first surface 110 and the second surface 120, wherein the inner diameter of the first end of the through hole 130 located on the first surface 110 is greater than the inner diameter of the second end of the through hole 130 located on the second surface 120. The indicator color-changing layer 200 is connected to the second surface 120 of the sponge layer 100.

[0037] Among them, the first surface 110 of the sponge layer 100 is used to adhere to the surface of the patient's wound. The exudate from the patient's wound can be absorbed by the sponge layer 100 and flow along the through hole 130 to the indicator color-changing layer 200. The indicator color-changing layer 200 can change color when in contact with the exudate.

[0038] After the new dressing that can prompt the replacement is attached to the surface of the patient's wound, the sponge layer 100 can absorb the exudate flowing out of the patient's wound on the one hand, and on the other hand, part of the exudate can enter the through hole 130. Based on the capillary action, the exudate can flow along the through hole 130 to the indicator color-changing layer 200 located on the other side of the sponge layer 100, and after contacting the indicator color-changing layer 200, the indicator color-changing layer 200 changes color, thereby prompting the medical staff to replace the current dressing in time.

[0039] Specifically, the through hole 130 is designed as a conical hole with a changing inner diameter, and the inner diameter of the through hole 130 gradually decreases from the first end to the second end of the through hole 130 , so that the exudate can more easily overcome gravity and flow upward to the indicating color-changing layer 200 to complete the contact with the indicating color-changing layer 200 .

[0040] Furthermore, the sponge layer 100 is specifically a composite sponge layer of highly absorbent polyvinyl alcohol and gelatin. Compared with conventional ordinary sponges, the composite sponge has a better water absorption capacity and has good mechanical strength, high resilience, high porosity and good biocompatibility. Therefore, after being applied to the wound surface of the patient, the external air can better penetrate the sponge into the wound, improving the patient's use experience and reducing the impact on wound healing. On the other hand, the softer texture and high elasticity also allow the new dressing to fit the patient's skin surface better, thereby improving the tightness after application and preventing exudate from leaking out from the gap between the new dressing and the patient's skin. At the same time, the better mechanical strength and resilience allow the new dressing to be compressed and shaped under a strain of 50%, and expand to more than 6 times its volume under the action of water and blood, with a higher upper limit of exudate absorption.

[0041] Specifically, after preparation, the sponge layer needs to be soaked in glutaraldehyde for cross-linking treatment. Cross-linking treatment refers to a process of forming covalent or non-covalent bonds between polymer chains or inside molecules through chemical reactions or physical actions, thereby forming a three-dimensional network structure. This cross-linked structure can significantly improve the mechanical properties, thermal stability and chemical resistance of the material.

[0042] Specifically, the molecular weight of the polyvinyl alcohol is 85000 to 125000, and the gelatin is specifically pig skin gelatin. The weight ratio of the polyvinyl alcohol to the gelatin is between 2:1 and 4:1, and the elasticity, hardness and toughness of the new dressing can be flexibly changed by changing the ratio of the polyvinyl alcohol to the gelatin.

[0043] Optionally, in some embodiments, the dressing that can be prompted to change to a new type of dressing is fixed to the patient's wound surface using additional tape. Specifically, after applying the dressing that can be prompted to change to a new type of dressing on the wound, use tape to bypass the dressing that can be prompted to change to a new type of dressing and stick it on the patient's skin surface. In this embodiment, the first surface 110 of the sponge layer 100 is provided with a pressure-sensitive adhesive to stick to the patient's wound surface. Compared with using an external tape for pasting and fixing, when the dressing that can be prompted to change to a new type of dressing needs to be fixed to the patient's wound, it is only necessary to tear off the protective film of the pressure-sensitive adhesive, and then stick the dressing that can be prompted to change to a new type of dressing to the patient's skin. It is easier to complete the pasting operation using the pressure-sensitive adhesive on the first surface 110 of the sponge layer 100, and the sponge layer 100 fits more closely to the patient's skin, which is not easy to cause the exudate to leak sideways, and can better absorb the exudate.

[0044] Furthermore, the pressure-sensitive adhesive and the sponge layer 100 are both transparent, so that the sticking position of the pressure-sensitive adhesive can be easily observed, thereby avoiding poor sealing of the patient's wound due to sticking position deviation, and preventing exudate from leaking from the edge that could indicate the need to replace a new dressing.

[0045] Specifically, for the color change principle of the indicator color-changing layer 200, the indicator color-changing layer 200 is doped with water-soluble color powder, and the water-soluble color powder changes color when it contacts the exudate of the patient's wound. When the sponge layer 100 is not fully absorbed, the exudate does not pass through the through hole 130 and contacts the indicator color-changing layer 200. At this time, the indicator color-changing layer 200 does not change color, indicating that the replacement of the new dressing can still be used to absorb more exudate. When the sponge layer 100 is fully absorbed, the continuously overflowing exudate eventually passes through the through hole 130 and contacts the indicator color-changing layer 200. At this time, the water-soluble color powder in the indicator color-changing layer 200 changes color when it encounters the exudate, indicating that the replacement of the new dressing has reached the absorption limit. After observing, the medical staff can remove the dressing in time and replace it with a new dressing to avoid the overflowing exudate from being deposited in the wound for a long time and causing wound infection.

[0046] Specifically, with regard to the specific size parameters of the sponge layer 100 and the indicator color changing layer 200, in this embodiment, the thickness of the sponge layer 100 is 2 to 6 mm, and the thickness of the indicator color changing layer 200 is 0.5 to 1 mm. It is easy to understand that the sponge layer 100 and the indicator color changing layer 200 can also adopt other sizes to adapt to the needs of the exudate absorption work, which will not be repeated here.

[0047] Optionally, the dressing that can prompt the replacement of a new dressing further includes a microporous filter membrane 300, which is disposed between the second surface 120 of the sponge layer 100 and the indicator color-changing layer 200. The microporous filter membrane 300 is a filter membrane provided with a plurality of tiny holes, which allows liquid water to pass through, while solid impurities cannot pass through the holes, and is used to filter impurities in the exudate to prevent the impurities from contacting and reacting with the indicator color-changing layer 200.

[0048] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A device that can prompt the replacement of a new dressing, characterized in that: include: A sponge layer, wherein the sponge layer transitions from the first surface to the second surface along the thickness direction thereof, wherein a plurality of through holes are arranged in the sponge layer, and two ends of the through holes respectively penetrate to the first surface and the second surface, wherein the inner diameter of the first end of the through hole located on the first surface is greater than the inner diameter of the second end of the through hole located on the second surface; an indicating color-changing layer, the indicating color-changing layer being connected to the second surface of the sponge layer; The first surface of the sponge layer is used to adhere to the surface of the patient's wound. The exudate from the patient's wound can be absorbed by the sponge layer and flow along the through hole to the indicator color-changing layer. The indicator color-changing layer can change color when in contact with the exudate.

2. The new dressing capable of prompting replacement according to claim 1, characterized in that: The sponge layer is specifically a composite sponge layer of polyvinyl alcohol and gelatin.

3. The new dressing capable of prompting replacement according to claim 2, characterized in that: The molecular weight of the polyvinyl alcohol is 85,000 to 125,000, and the gelatin is specifically pig skin gelatin.

4. The new dressing capable of prompting replacement according to claim 2, characterized in that: The weight ratio of the polyvinyl alcohol to the gelatin is between 2:1 and 4:

1.

5. The new dressing capable of prompting replacement according to claim 1, characterized in that: The first surface of the sponge layer is provided with a pressure-sensitive adhesive for being adhered to the wound surface of the patient.

6. The new dressing capable of prompting replacement according to claim 1, characterized in that: An inner diameter of the through hole gradually decreases from a first end to a second end of the through hole.

7. The new dressing capable of prompting replacement according to claim 1, characterized in that: The color-changing indicating layer is doped with water-soluble color powder, and the water-soluble color powder changes color when in contact with exudate from a patient's wound.

8. The new dressing capable of prompting replacement according to any one of claims 1 to 7, characterized in that: The thickness of the sponge layer is 2 to 6 mm.

9. The new dressing capable of prompting replacement according to any one of claims 1 to 7, characterized in that: The thickness of the indicating color-changing layer is 0.5 to 1 mm.

10. The new dressing capable of prompting replacement according to any one of claims 1 to 7, characterized in that: The dressing that can prompt the replacement of a new type also includes a microporous filtration membrane, which is arranged between the second surface of the sponge layer and the indicator color change layer, and the microporous filtration membrane is used to filter impurities in the exudate.

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