An arterial puncture pressing patch

Abstract

The utility model provides a kind of protective pad type arterial puncture pressing plaster, belong to medical instrument technical field, it includes skin hemostatic layer, self-adapting pressure layer and outer protective layer that are sequentially stacked, self-adapting pressure layer is filled with SAP microparticle of gradient concentration distribution inside, layer is equipped with elastic partition wall, elastic partition wall separates self-adapting pressure layer into multiple independent grading expansion unit, the bottom surface of self-adapting pressure layer is the arc constraint surface that is recessed towards skin hemostatic layer;Outer protective layer is equipped with transparent observation window corresponding puncture point area, outer protective layer periphery is surrounded and is equipped with annular hydrocolloid self-adhesive edge, the utility model is through three layers structure cooperation SAP gradient concentration distribution, elastic partition wall grading expansion unit and arc constraint surface, realizes adaptive output grading compression force according to bleeding volume and directs concentration expansion force in puncture point, simultaneously realizes the observation and fixed of puncture point state through transparent observation window and annular hydrocolloid self-adhesive edge.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a pad-type arterial puncture pressure dressing. Background Technology

[0002] Arterial puncture is a widely used invasive procedure in clinical diagnosis and treatment, playing a crucial role in blood gas analysis, continuous invasive arterial blood pressure monitoring, intraoperative drug administration during interventional procedures, and hemodynamic monitoring of critically ill patients. Postoperative continuous and stable pressure at the puncture site is a core element in reducing postoperative complications such as subcutaneous hematoma, puncture site bleeding, and pseudoaneurysms. Currently, self-expanding hemostatic dressings are commonly used in clinical practice to replace traditional manual pressure. These dressings typically consist of a surface fixation layer and an internal water-absorbing and expanding layer. After application, the pressure is generated by the swelling properties of the expanding material upon contact with blood or tissue fluid, offering advantages such as ease of use and the ability to maintain pressure for extended periods.

[0003] However, existing self-expanding arterial hemostatic dressings still have the following problems in practical applications: the expansion material triggers overall swelling upon contact with liquid, making it impossible to grade and output corresponding pressure intensity according to the different bleeding volumes of minor oozing and active bleeding at the puncture point. Excessive pressure may cause distal limb ischemia when there is only minor oozing, while insufficient pressure may fail to stop bleeding quickly when there is massive bleeding. There is a lack of directional constraint structure during the expansion process, and the swelling direction is dispersed to the sides and back of the dressing, resulting in a low proportion of effective positive pressure force acting vertically on the puncture point. The circumferential expansion force of the integral expansion body can pull the edge of the dressing and cause displacement, leading to shear force on the skin around the puncture point and causing the hemostasis position to deviate. In addition, existing dressings lack an intuitive pressure indication mechanism, and medical staff cannot judge the actual pressure intensity by appearance and can only rely on clinical experience for assessment, which can easily lead to complications due to improper pressure control.

[0004] Therefore, it is necessary to propose a pad-type arterial puncture pressure dressing to solve the above problems. Utility Model Content

[0005] This application provides a pad-type arterial puncture pressure dressing to improve the technical problems existing in related technologies, such as the inability of self-expanding hemostatic dressings to respond in a graded manner to expansion pressure, the lack of directional constraint on expansion direction, the tendency of integral expansion to produce traction effect, and the lack of intuitive pressure indication mechanism.

[0006] This application provides a pad-type arterial puncture pressure dressing, comprising a skin-adhesive hemostatic layer, an adaptive pressure layer, and an outer protective layer stacked sequentially. The adaptive pressure layer is filled with SAP microparticles of gradient concentration and has an elastic partition wall that divides the adaptive pressure layer into multiple independent hierarchical expansion units. The bottom surface of the adaptive pressure layer is an arc-shaped constraint surface that is concave towards the skin-adhesive hemostatic layer. The outer protective layer has a transparent observation window corresponding to the puncture point area, and an annular hydrocolloid self-adhesive edge is provided around the periphery of the outer protective layer.

[0007] The technical solution described above in this application embodiment has at least the following technical effects: By setting a three-layer synergistic structure of skin-adhesive hemostatic layer, adaptive pressure layer and outer protective layer, combined with the gradient concentration distribution of SAP microparticles in the adaptive pressure layer, the graded expansion units formed by the elastic partition wall, and the arc-shaped constraint surface on the bottom, the dressing can adaptively output graded pressure according to the bleeding volume at the puncture point, and concentrate the expansion force on the puncture point, avoiding dressing displacement caused by the overall expansion traction. At the same time, the transparent observation window and the annular hydrocolloid self-adhesive edge enable intuitive observation of the puncture point status and reliable fixation of the dressing, solving the technical problems of existing self-expanding hemostatic dressings that cannot respond to expansion pressure in a graded manner, lack of directional constraint on expansion direction, easy traction effect of overall expansion, and lack of intuitive pressure indication mechanism.

[0008] In some embodiments, the concentration of the SAP microparticles decreases from the central region to the edge region of the adaptive pressurization layer.

[0009] In some embodiments, the elastic partition wall divides the adaptive pressure layer into an upper expansion unit and a lower expansion unit, wherein the upper expansion unit is a low-threshold expansion unit and the lower expansion unit is a high-threshold expansion unit, and the expansion trigger threshold of the low-threshold expansion unit is lower than that of the high-threshold expansion unit, so that the expansion of the low-threshold expansion unit is preferentially triggered when there is a small amount of bleeding.

[0010] In some embodiments, the high threshold expansion unit is further divided into multiple independent sub-units.

[0011] In some embodiments, the skin-adhering hemostatic layer is an oxidized regenerated cellulose freeze-dried sponge.

[0012] The beneficial effects of this utility model are as follows: By setting a three-layer synergistic structure of skin-adhesive hemostatic layer, adaptive pressure layer and outer protective layer, combined with the gradient concentration distribution of SAP microparticles in the adaptive pressure layer, the graded expansion units formed by the elastic partition wall, and the arc-shaped constraint surface on the bottom, the dressing can adaptively output graded pressure according to the bleeding volume at the puncture point, and concentrate the expansion force on the puncture point, avoiding the dressing displacement caused by the overall expansion traction. At the same time, the transparent observation window and the annular hydrocolloid self-adhesive edge enable intuitive observation of the puncture point status and reliable fixation of the dressing. This solves the technical problems of existing self-expanding hemostatic dressings, such as the inability to respond gradedly to expansion pressure, lack of directional constraint on expansion direction, easy traction effect caused by overall expansion, and lack of intuitive pressure indication mechanism. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of the pad-type arterial puncture pressure dressing provided in the embodiments of this application. Figure 1 ; Figure 2 A three-dimensional structural diagram of the pad-type arterial puncture pressure dressing provided in the embodiments of this application. Figure 2 ; Figure 3 This is an exploded structural diagram of the pad-type arterial puncture pressure dressing provided in the embodiments of this application; Figure 4 A schematic cross-sectional view of the pad-type arterial puncture compression dressing provided in an embodiment of this application; The following are the labeling elements in the figure: 1. Outer protective layer; 11. Transparent observation window; 12. Hydrocolloid self-adhesive edge; 2. Adaptive pressure layer; 21. SAP microparticles; 22. Elastic partition wall; 23. Low threshold expansion unit; 24. High threshold expansion unit; 3. Skin-adhesive hemostatic layer; 4. Cross-shaped gasket. Detailed Implementation

[0014] Based on this, in order to improve the technical problems existing in the related technology, such as the inability of self-expanding hemostatic dressings to respond to expansion pressure in a graded manner, the lack of directional constraints on expansion direction, the tendency of integral expansion to produce traction effect, and the lack of intuitive pressure indication mechanism, the embodiments of this application provide the following solutions.

[0015] Please refer to the following: Figures 1 to 4This invention proposes a pad-type arterial puncture compression dressing, comprising a skin-adhesive hemostatic layer 3, an adaptive pressure layer 2, and an outer protective layer 1 stacked sequentially. The skin-adhesive hemostatic layer 3 is located at the bottom layer and is used to directly adhere to the skin at the puncture site. The adaptive pressure layer 2 is stacked on top of the skin-adhesive hemostatic layer 3 and is the core functional layer of the dressing. It is filled with SAP microparticles 21 with a gradient concentration distribution and has elastic partition walls 22 that divide the adaptive pressure layer 2 into multiple independent graded expansion units. The bottom surface of the adaptive pressure layer 2 is an arc-shaped constraint surface that is concave towards the skin-adhesive hemostatic layer 3. The outer protective layer 1 covers the adaptive pressure layer 2 and has a transparent observation window 11 corresponding to the puncture point area, with an annular hydrocolloid self-adhesive edge 12 surrounding it. Through the synergistic cooperation of the above three layers, the dressing achieves the integration of chemical coagulation and physical graded compression, and can adaptively output graded compression force according to the amount of bleeding at the puncture point, and direct the expansion force to the puncture point.

[0016] The skin-adhering hemostatic layer 3 is an oxidized regenerated cellulose freeze-dried sponge with a high-porosity three-dimensional porous network structure, preferably with a porosity of 80% to 95%. Upon contact with blood, the oxidized regenerated cellulose freeze-dried sponge rapidly absorbs moisture from the blood and undergoes a gel transformation, simultaneously activating a chemical coagulation-promoting effect. This forms a preliminary hemostatic barrier before the adaptive pressure layer 2 exerts physical pressure, providing a response window for subsequent graded expansion. The oxidized regenerated cellulose freeze-dried sponge also exhibits good biocompatibility and in vivo biodegradability, leaving no residue risk after use.

[0017] The adaptive pressure layer 2 has a flat, disc-shaped structure. Its interior is filled with SAP microparticles 21, which are highly absorbent polymer microparticles. The concentration of SAP microparticles 21 decreases from the center to the edges, exhibiting a gradient distribution. This gradient concentration distribution can be achieved through layered application or gradient spraying processes, ensuring the highest SAP content and strongest water absorption and expansion capacity in the central area, gradually decreasing towards the edges. This naturally concentrates the expansion force in the core area of ​​the puncture point, achieving spatial pressure focusing without the need for additional structures.

[0018] The elastic partition wall 22 is made of an elastic polymer material, such as a thermoplastic polyurethane film or a silicone rubber film, possessing excellent elastic deformation and resilience. The elastic partition wall 22 divides the adaptive pressure layer 2 into an upper expansion unit and a lower expansion unit in the thickness direction. The upper expansion unit is a low-threshold expansion unit 23, and the lower expansion unit is a high-threshold expansion unit 24. The low-threshold expansion unit 23 has a lower filling density of SAP microparticles 21, and the elastic partition wall 22 is thinner and has a lower elastic modulus in the upper region, resulting in a lower expansion trigger threshold for the low-threshold expansion unit 23 compared to the high-threshold expansion unit 24. When a small amount of blood permeates into the adaptive pressure layer 2, the low-threshold expansion unit 23 is preferentially triggered to expand, generating a gentle pressure and avoiding excessive pressure that could block blood flow to the distal limb. When the bleeding increases and more blood permeates into the lower layer, the high-threshold expansion unit 24 is triggered to expand, outputting a stronger pressure. This achieves the effect of adaptively graded pressure output according to the amount of bleeding, balancing hemostasis effectiveness and safety.

[0019] The adaptive pressure layer 2 adopts a "high at the bottom, low at the top" threshold layering design—the lower layer adjacent to the skin-adhering hemostatic layer is the high-threshold expansion unit 24, and the upper layer adjacent to the outer protective layer is the low-threshold expansion unit 23. The core principle of this arrangement is based on the positive correlation between blood penetration depth and bleeding volume to achieve precise matching between pressure and bleeding degree. After the blood seeping from the puncture point is initially absorbed and coagulated by the skin-adhering hemostatic layer, it permeates upward into the adaptive pressure layer: when there is only a small amount of bleeding, the blood can only slightly infiltrate the lower high-threshold expansion unit 24. Due to the high density of SAP microparticles in this unit and the higher liquid volume threshold required to trigger expansion, the small amount of blood is insufficient to trigger its full expansion, and the blood will continue to diffuse upward to the upper low-threshold expansion unit 23; the low-threshold expansion unit 23 has an even lower density of SAP microparticles, and the corresponding area has a thinner elastic septum wall and a smaller elastic modulus. Only a small amount of liquid is needed to trigger expansion, initially delivering a gentle basic pressure, suppressing bleeding while avoiding excessive pressure that blocks blood flow to the distal limb. As bleeding continues to increase, the infiltrate volume in the lower high-threshold expansion unit 24 gradually accumulates to the trigger threshold. The high-density SAP particles rapidly and fully expand, directly applying strong pressure to the adjacent puncture site area. The force transmission path is shorter, and the effective pressure loss is lower, which can quickly control active bleeding. At the same time, the upper expanded low-threshold unit 23 can form a reverse force with the support of the outer protective layer, further transmitting the expansion pressure downwards, forming a synergistic pressurization effect with the high-threshold unit. This arrangement ensures the accuracy of the graded pressurization response from both the liquid permeation logic and the mechanical transmission path. It ensures both gentle pressurization for minor bleeding and precise output of strong pressure for major bleeding, making the adaptive pressure adjustment logic more in line with the actual clinical bleeding process.

[0020] In a preferred embodiment, the high-threshold expansion unit 24 is further divided into multiple independent sub-units, which are completely isolated from each other by elastic partition walls 22 and are not interconnected. This structure ensures that only the sub-unit corresponding to the bleeding area expands, while the sub-unit corresponding to the adjacent hemostatic area remains stationary. This avoids the problem of local bleeding triggering expansion of the entire area, which could lead to secondary traction on the healed site, dislodgement of the blood clot, and rebleeding, thus improving the stability and reliability of hemostasis.

[0021] The bottom surface of the adaptive pressure layer 2 is configured as an arc-shaped constraint surface recessed towards the skin-adhesive hemostatic layer 3. The arc-shaped constraint surface is made of a rigid or semi-rigid material, such as a polycarbonate arc-shaped sheet or a polypropylene arc-shaped sheet, with a radius of curvature preferably between 15 mm and 40 mm, matching the surface curvature of common arterial puncture sites. When the SAP microparticles 21 in the adaptive pressure layer 2 absorb water and swell, the arc-shaped constraint surface restricts the expansion of the expanded body in directions other than those of the skin-adhesive hemostatic layer 3, guiding the originally dispersed free expansion force to the sides and back into a concentrated pressure force directed towards the puncture point. This significantly increases the proportion of the positive effective pressure force acting vertically on the puncture point, allowing for efficient utilization of expansion energy.

[0022] The outer protective layer 1 covers the adaptive pressure layer 2, serving to protect the inner functional layer and fix the dressing. A transparent observation window 11 is located in the center of the outer protective layer 1. This window is made of transparent medical-grade polyurethane film or polyethylene terephthalate film, and its position corresponds to the puncture point area. This allows medical personnel to directly observe the bleeding status and hemostasis at the puncture point without removing the dressing, facilitating timely assessment of the hemostasis effect and avoiding secondary damage to the puncture point caused by frequent dressing removal. The outer protective layer 1 is surrounded by an annular hydrocolloid self-adhesive edge 12. The hydrocolloid material has moderate adhesion, forming a reliable bond with the skin, preventing the dressing from shifting or loosening due to changes in patient position or external force during use. Simultaneously, the hydrocolloid material has good breathability and waterproofness, maintaining the normal physiological environment of the skin in the puncture area while ensuring fixation, reducing the risk of skin maceration and allergic reactions.

[0023] In practical use, the dressing is applied to the skin surface with the skin-adhesive hemostatic layer 3 aligned with the arterial puncture site and secured by the annular hydrocolloid self-adhesive edge 12. Blood seeping from the puncture site first contacts the oxidized regenerated cellulose freeze-dried sponge of the skin-adhesive hemostatic layer 3. The sponge rapidly absorbs water, gels, and activates a chemical coagulation effect, forming a preliminary hemostatic barrier. Blood continues to permeate to the adaptive pressure layer 2, initially triggering the SAP microparticles 21 within the upper low-threshold expansion unit 23 to absorb water and expand, generating a gentle pressure. If the bleeding is small, only the low-threshold expansion unit 23 is needed to achieve hemostasis. If active bleeding or a large amount of bleeding occurs at the puncture site, the blood further permeates to the lower high-threshold expansion unit 24, triggering the SAP microparticles 21 within it to absorb water and expand, delivering a stronger pressure.

[0024] In actual use, simply align the skin-adhesive hemostatic layer 3 with the arterial puncture point and attach it to the skin surface. Gently press the surrounding annular hydrocolloid self-adhesive edge 12 to fix it in place, and the subsequent hemostasis process will proceed automatically. The blood seeping from the puncture point first comes into contact with the skin-adhesive hemostatic layer 3, quickly forming a preliminary hemostatic barrier. If it is a small amount of bleeding, the blood penetrates to the upper low-threshold expansion unit 23, and is blocked by the lower high-threshold expansion unit 24 to trigger gentle pressure to stop the bleeding. If the bleeding is large, the blood penetrates to the lower high-threshold expansion unit, outputting stronger pressure to stop the bleeding, without the need for continuous manual pressure throughout the process.

[0025] Overall, this pad-type arterial puncture pressure dressing achieves a deep integration of chemical coagulation and physical graded pressure through the synergistic effect of its three-layer structure. It addresses the pain points of high labor costs and difficulty in controlling the pressure of manual pressure application, while also overcoming the shortcomings of ordinary dressings such as fixed pressure and poor adaptability. Furthermore, its transparent design and comfortable fixation balance clinical convenience and patient experience. It effectively improves hemostasis efficiency after arterial puncture, reduces the risk of related complications, and alleviates the workload of medical staff, demonstrating high practical value in clinical arterial puncture nursing scenarios.

[0026] As a further specific embodiment, the skin-adhesive hemostatic layer 3 has a cross-shaped pad 4 on the skin-facing side. The cross-shaped pad 4 is made of medical soft polyurethane foam or medical silicone gel material, with a thickness of 0.5 to 2 mm. The central hollow area of ​​its cross-shaped structure corresponds one-to-one with the puncture point position, and the overall coverage area of ​​the pad matches the projection area of ​​the arterial indwelling needle seat on the skin surface. In use, first place the cross-shaped pad 4 on the skin area below the arterial needle seat, so that the rigid base of the needle seat completely covers the supporting surface of the cross-shaped pad 4, and then attach and fix the entire dressing with the skin-adhesive hemostatic layer 3 aligned with the puncture point. The cross-shaped pad 4 cushions the rigid pressure of the needle hub through its own soft deformation ability, disperses the vertical pressure and lateral shear force borne by the local skin, and avoids pressure damage caused by the continuous pressure of the hard needle hub on the local skin during long-term indwelling of the arterial needle; at the same time, the cross-shaped central hollow structure will not cover the puncture point area, will not hinder the penetration of blood into the skin-adhering hemostatic layer 3, and will not affect the observation of the bleeding and hemostasis status of the puncture point through the transparent observation window 11.

[0027] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pad-type arterial puncture pressure dressing, comprising a skin-adhesive hemostatic layer (3), an adaptive pressure layer (2), and an outer protective layer (1) stacked sequentially, characterized in that: The adaptive pressure layer (2) is filled with SAP microparticles (21) in a gradient concentration distribution. The layer is provided with an elastic partition wall (22), which divides the adaptive pressure layer (2) into multiple independent hierarchical expansion units. The bottom surface of the adaptive pressure layer (2) is an arc-shaped constraint surface that is recessed towards the skin-adhesive hemostatic layer (3). The outer protective layer (1) has a transparent observation window (11) corresponding to the puncture point area, and the outer protective layer (1) is surrounded by an annular hydrocolloid self-adhesive edge (12).

2. The pad-type arterial puncture pressure dressing according to claim 1, characterized in that: The concentration of the SAP microparticles (21) decreases from the central region to the edge region of the adaptive pressurization layer (2).

3. The pad-type arterial puncture pressure dressing according to claim 1, characterized in that: The elastic partition wall (22) divides the adaptive pressure layer (2) into an upper expansion unit and a lower expansion unit. The upper expansion unit is a low-threshold expansion unit (23), and the lower expansion unit is a high-threshold expansion unit (24). The expansion trigger threshold of the low-threshold expansion unit (23) is lower than that of the high-threshold expansion unit (24), so that the expansion of the low-threshold expansion unit (23) is preferentially triggered when there is a small amount of bleeding.

4. The pad-type arterial puncture pressure dressing according to claim 3, characterized in that: The high threshold expansion unit (24) is further divided into multiple independent sub-units.

5. The pad-type arterial puncture pressure dressing according to claim 1, characterized in that: The skin-adhering hemostatic layer (3) is an oxidized regenerated cellulose freeze-dried sponge.

6. The pad-type arterial puncture pressure dressing according to claim 1, characterized in that: The skin-adhesive hemostatic layer (3) has a cross-shaped pad (4) on the skin-adhesive side, and the cross-shaped pad (4) is arranged in relation to the pressure area of ​​the arterial indwelling needle seat.

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