Hemostatic gauze for hemodialysis

Abstract

The hemostatic gauze for hemodialysis comprises a gauze body, and a plurality of restraint straps are arranged on the gauze body. A contact layer, a hemostasis layer, an isolation layer and a fixing layer are sequentially arranged on the gauze body from bottom to top; the contact layer is made of a hydrophilic biocompatible material; thrombin, chitosan microspheres and gelatin sponge are arranged in the hemostatic layer; the isolating layer is made of a polytetrafluoroethylene film, and the fixing layer is made of elastic medical non-woven fabric. According to the multi-layer structural design that the gauze body is sequentially provided with the contact layer, the hemostasis layer, the isolation layer and the fixing layer from bottom to top, and all the layers are clear in function and cooperate with one another; the contact layer is in direct contact with the wound and is responsible for primary blood coagulation promotion and adhesion prevention; the hemostatic layer can stop bleeding efficiently; the isolating layer plays a dual role in blocking outside bacteria and preventing adhesion; the fixing layer ensures that the whole gauze is stably fixed at the wound part; due to the layered structural design, the hemostatic gauze can effectively meet various requirements for hemostasis and follow-up nursing of a hemodialysis puncture part.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, specifically to a hemostatic gauze for hemodialysis. Background Technology

[0002] Hemodialysis is one of the important renal replacement therapies for patients with end-stage renal disease. During hemodialysis, the patient's vascular access needs to be punctured to establish extracorporeal circulation and purify the blood. However, puncture inevitably leads to bleeding; therefore, effective hemostasis is crucial for ensuring the smooth progress of hemodialysis treatment, reducing patient suffering, and minimizing the risk of infection.

[0003] Traditional methods of hemostasis include pressure hemostasis, but these methods have many limitations. For example, relying solely on manual pressure from medical staff is not only labor-intensive and time-consuming, but also makes it difficult to ensure consistent hemostatic effects. Furthermore, existing gauze needs to be wrapped around the wound multiple times during use, consuming a large amount of raw materials. Ordinary hemostatic gauze may adhere to the wound during the hemostasis process, easily causing secondary bleeding when changing dressings or removing gauze, causing additional pain to the patient and increasing the risk of wound infection. Utility Model Content

[0004] The main objective of this invention is to provide a hemostatic gauze for hemodialysis to solve the aforementioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hemostatic gauze for hemodialysis, comprising a gauze body with several restraint straps; the gauze body is provided with a contact layer, a hemostatic layer, an isolation layer, and a fixing layer from bottom to top; the contact layer is made of a hydrophilic biocompatible material; the hemostatic layer contains thrombin, chitosan microspheres, and gelatin sponge; the isolation layer is made of polytetrafluoroethylene film; and the fixing layer is made of elastic medical nonwoven fabric.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the surface of the contact layer has multiple nanoscale protrusion structures, and the thickness of the contact layer is 0.1-0.5 mm.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the thickness of the hemostatic layer is 0.5-1.5mm.

[0008] Based on the above scheme and as a preferred option, the thickness of the isolation layer is 0.05-0.2mm.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the material of the medical nonwoven fabric is a composite fiber of polypropylene and polyester; the thickness of the fixing layer is 0.3-0.8mm.

[0010] The beneficial effects of this utility model are as follows: The gauze body is designed with a multi-layer structure from bottom to top, consisting of a contact layer, a hemostatic layer, an isolation layer, and a fixing layer. Each layer has a clear function and works synergistically with the others. The contact layer is in direct contact with the wound and is responsible for promoting initial coagulation and preventing adhesion. The hemostatic layer provides efficient hemostasis. The isolation layer serves the dual purpose of blocking external bacteria and preventing adhesion. The fixing layer ensures the stable fixation of the entire gauze at the wound site. This layered structure design enables the hemostatic gauze to comprehensively and effectively meet the various needs of hemostasis and subsequent care at the hemodialysis puncture site. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the contact layer, hemostatic layer, isolation layer and fixing layer in this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0014] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0018] See attached diagram. Figures 1 to 2 This embodiment of a hemostatic gauze for hemodialysis includes a gauze body 1 with several restraint straps 2. The gauze body 1 is provided with a contact layer 3, a hemostatic layer 4, an isolation layer 5, and a fixing layer 6 from bottom to top. The contact layer 3 is made of a hydrophilic biocompatible material. The hemostatic layer 4 contains thrombin, chitosan microspheres, and gelatin sponge. The isolation layer 5 is made of polytetrafluoroethylene film, and the fixing layer 6 is made of elastic medical nonwoven fabric.

[0019] In this embodiment, the thickness of the hemostatic layer is 0.5-1.5 mm, and the hemostatic layer 4 contains thrombin, chitosan microspheres, and gelatin sponge. Thrombin, as a key coagulation factor, can directly act on fibrinogen in the blood, causing it to be converted into fibrin, thereby forming a blood clot and rapidly initiating the coagulation process;

[0020] Chitosan microspheres not only provide a stable carrier for thrombin, enabling it to be released slowly and continuously, thus prolonging the action time of thrombin at the wound site, but chitosan itself also has good hemostatic properties and biocompatibility, and can promote platelet aggregation and activation of coagulation factors.

[0021] Gelatin sponge has a porous structure, and its pores can absorb a large amount of water and cellular components in the blood, thus concentrating the blood. At the same time, it provides a rich surface for the aggregation of clotting factors, further accelerating the formation of blood clots, significantly shortening the hemostasis time, and effectively reducing the risk of bleeding at the puncture site in hemodialysis patients.

[0022] In this embodiment, the thickness of the contact layer is 0.1-0.5 mm. The hydrophilic biocompatible material of the contact layer 3 and the nanoscale protrusion structure on its surface also play a positive auxiliary role in hemostasis. The hydrophilic material can quickly absorb water from the blood, thereby increasing the concentration of coagulation factors in the blood and accelerating the coagulation reaction. The nanoscale protrusion structure increases the contact area between the blood and the contact layer, providing more action sites for the coagulation process, promoting the adhesion and aggregation of platelets, and thus working together with the hemostatic layer to achieve efficient hemostasis.

[0023] In this embodiment, the contact layer 3 is made of a hydrophilic biocompatible material, which will not cause inflammatory reactions, allergic reactions or other immune rejection phenomena during contact with the wound. It can provide a safe and gentle environment for wound healing, reduce adverse effects on the patient's body, and help the patient recover after hemodialysis treatment.

[0024] In this embodiment, the thickness of the isolation layer is 0.05-0.2mm. The polytetrafluoroethylene film of the isolation layer 5 and the medical non-woven fabric (such as composite fiber of polypropylene and polyester) of the fixing layer also have excellent biocompatibility. During long-term contact with human skin, they will not cause irritation or toxicity to the skin, ensuring the safety and reliability of the hemostatic gauze during use, and making it suitable for long-term and repeated use by hemodialysis patients.

[0025] The polytetrafluoroethylene film of the isolation layer 5 has extremely low surface energy, which can effectively prevent the hemostatic gauze from sticking to the external dressing or wound exudate. This not only facilitates the operation of medical staff in the subsequent dressing change process and reduces unnecessary stimulation to the patient's wound, but also helps to keep the wound clean and dry, creating good conditions for wound healing, reducing the risk of infection, and improving the treatment effect.

[0026] In this embodiment, the thickness of the fixation layer is 0.3-0.8 mm. The fixation layer 6 is made of elastic medical non-woven fabric, whose elastic properties allow it to adapt to changes in swelling or body movement at the puncture site that may occur during hemodialysis treatment. On the one hand, it can provide stable fixation pressure, ensuring close contact between the hemostatic gauze and the wound and promoting hemostasis; on the other hand, it will not cause discomfort to the patient or affect local blood circulation due to excessive tightness, providing a more comfortable treatment experience for the patient and helping to improve patient compliance with hemodialysis treatment. At the same time, the medical non-woven fabric is soft and has good comfort when in contact with the skin, further enhancing the user experience of the product.

[0027] The several restraint straps 2 provided on the gauze body 1 can easily fix the hemostatic gauze to the puncture site of the hemodialysis patient, ensuring that the hemostatic gauze always stays in the correct position during treatment or when the patient moves, and will not affect the hemostatic effect due to displacement; and the restraint straps eliminate the need to wrap the gauze multiple times, saving materials.

[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A hemostatic gauze for hemodialysis, characterized by: The gauze body is provided with a plurality of constraint belts, and is sequentially provided from bottom to top with a contact layer, a hemostatic layer, an isolation layer and a fixing layer.

2. The hemostatic gauze for hemodialysis according to claim 1, wherein: The surface of the contact layer has a plurality of nano-scale convex structures, and the thickness of the contact layer is 0.1-0.5mm.

3. The hemostatic gauze for hemodialysis according to claim 2, wherein: The thickness of the hemostatic layer is 0.5-1.5mm.

4. The hemostatic gauze for hemodialysis according to claim 3, wherein: The thickness of the isolation layer is 0.05-0.2mm.

5. The hemostatic gauze for hemodialysis according to claim 4, wherein: The material of the medical non-woven fabric is a composite fiber of polypropylene and polyester, and the thickness of the fixing layer is 0.3-0.8mm.

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