Hemostatic bandage

Abstract

The application relates to the technical field of medical devices, and discloses a hemostatic bandage which comprises a bandage body and a balloon, the balloon is arranged on the bandage body, the balloon has a cavity and can be inflated to increase the volume of the cavity, the side of the balloon away from the bandage body is a hemostatic surface, and the hydrophilicity of the center of the hemostatic surface is greater than that of the edge of the hemostatic surface. The balloon can press and hemostasis the wound, meanwhile, the hydrophilicity of the center of the hemostatic surface is greater than that of the edge of the hemostatic surface, under the action of the wetting gradient effect, more blood can be gathered to the center of the wound (the center of the hemostatic surface), the possibility of blood flowing outward is reduced, the hemostasis efficiency and the hemostasis effect of the hemostatic bandage on the bleeding wound are improved, the workload of frequently replacing the bandage is reduced, and the wound recovery of the patient is facilitated.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a hemostatic bandage. Background Technology

[0002] This section provides only background information relevant to this application and is not necessarily prior art.

[0003] Bandages are common medical supplies that can be applied to a patient's wound to provide some auxiliary treatment. Currently, bandages are usually made of ordinary gauze. For bleeding wounds, bandages have limited hemostatic effect, and frequent bandage changes may be necessary due to persistent bleeding, which is not conducive to wound recovery. Summary of the Invention

[0004] The purpose of this application is to at least alleviate the problem of the limited hemostatic effect of bandages. This purpose is achieved through the following technical solution:

[0005] The first aspect of this application provides a hemostatic bandage, including a bandage body and a balloon disposed on the bandage body. The balloon includes a hemostatic surface disposed opposite to the bandage body. The hemostatic surface includes a first region located at the center of the hemostatic surface and a second region adjacent to the first region. The first region has a higher hydrophilicity than the second region.

[0006] According to the hemostatic bandage of this application, when gas or other substances are filled into the cavity of the balloon, the volume of the cavity, i.e., the balloon, increases. When using the hemostatic bandage, the hemostatic surface of the balloon adheres to the wound. When the balloon is inflated, it can apply pressure to the wound to stop bleeding. Simultaneously, the hydrophilicity of the first region is greater than that of the second region. Since liquids tend to migrate towards areas with stronger hydrophilicity, the retention time of blood on the hemostatic surface can be delayed, thereby promoting coagulation.

[0007] In addition, the hemostatic bandage according to this application may also have the following additional technical features:

[0008] In some embodiments of this application, a second region is disposed around a first region, a hydrophilic layer is disposed on the first region, and a hydrophobic layer is disposed on the second region.

[0009] In some embodiments of this application, the first region is located between two adjacent second regions.

[0010] In some embodiments of this application, a coagulation material is provided in the first region.

[0011] In some embodiments of this application, the hemostatic surface includes a one-way fluid-guiding structure. The hydrophilicity of the one-way fluid-guiding structure is greater in a first region than in a second region, and the hydrophilicity of the one-way fluid-guiding structure increases from the edge of the hemostatic surface to the center of the hemostatic surface.

[0012] In some embodiments of this application, the unidirectional fluid guiding structure includes a plurality of protrusions, which are spaced apart on the hemostatic surface; along the direction from the edge of the hemostatic surface to the center of the hemostatic surface, the height of the protrusions near the edge of the hemostatic surface is greater than the height of the protrusions near the center of the hemostatic surface, and / or the cross-sectional area of ​​the protrusions near the edge of the hemostatic surface is greater than the cross-sectional area of ​​the protrusions near the center of the hemostatic surface, and / or the spacing between two adjacent protrusions increases.

[0013] In some embodiments of this application, a plurality of protrusions are arranged in a circumferential array around the center of the hemostatic surface, and the protrusions extend from the edge of the hemostatic surface toward the center of the hemostatic surface.

[0014] In some embodiments of this application, each protrusion is arranged around the center of the hemostatic surface, and multiple protrusions are arranged at intervals along the direction from the center of the hemostatic surface to the edge.

[0015] In some embodiments of this application, the balloon includes a first balloon and a second balloon connected together. The first balloon has a first cavity and is expandable to increase the volume of the first cavity. The second balloon has a second cavity and is expandable to increase the volume of the second cavity. The elastic modulus of the second balloon is less than that of the first balloon. The balloon also includes a control component disposed between the first cavity and the second cavity for controlling the connection or disconnection between the first cavity and the second cavity.

[0016] In some embodiments of this application, the bandage body includes a band body and an elastic band, the elastic band being connected to the band body, and the balloon being disposed on the elastic band and located on the side of the elastic band opposite to the band body. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 A schematic diagram of a hemostatic bandage according to some embodiments of this application is shown;

[0019] Figure 2 A schematic diagram of a hemostatic bandage according to other embodiments of this application is shown;

[0020] Figure 3 A schematic diagram of a hemostatic bandage according to some embodiments of the present application is shown;

[0021] Figure 4 schematically shown Figure 3 A partial cross-sectional view of the balloon of the hemostatic bandage shown;

[0022] Figure 5 A schematic diagram of a hemostatic bandage according to some embodiments of the present application is shown;

[0023] Figure 6 schematically shown Figure 5 A partial cross-sectional view of the balloon of the hemostatic bandage shown in one direction;

[0024] Figure 7 schematically shown Figure 5 A partial cross-sectional view of the balloon of the hemostatic bandage shown from another direction;

[0025] Figure 8 A schematic diagram of a hemostatic bandage according to some embodiments of this application is shown;

[0026] Figure 9 schematically shown Figure 8 A partial sectional view;

[0027] Figure 10 A partial cross-sectional view of a balloon according to some embodiments of this application is schematically shown;

[0028] Figure 11 This schematically illustrates a balloon in some embodiments of the present application where the first cavity and the second cavity are disconnected from each other;

[0029] Figure 12 schematically shown Figure 11 A magnified view of a portion of the image;

[0030] Figure 13 A schematic diagram illustrating the communication between the first cavity and the second cavity of a balloon in some embodiments of this application is shown.

[0031] Figure 14 schematically shown Figure 13 A magnified view of a portion of the image.

[0032] The attached figures are labeled as follows:

[0033] 100. Bandage body; 110. Belt body; 120. Elastic band; 130. Connector;

[0034] 200, balloon; 201, hemostatic surface; 202, unidirectional fluid guiding structure; 203, protrusion; 2041, first region; 2042, second region; 210, first capsule body; 211, first cavity; 220, second capsule body; 221, second cavity; 230, septum; 240, connecting hole;

[0035] 300. Control component; 310. Drive component; 312. Inflation channel; 313. Sealing and plugging component; 320. Control component; 321. Elastic ring structure; 322. Elastic plugging part; 323. Vent hole; 324. Outlet. Detailed Implementation

[0036] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0037] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0038] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0039] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "upper," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure.

[0040] Example 1

[0041] like Figure 1 As shown, according to an embodiment of this application, this embodiment provides a hemostatic bandage, including a bandage body 100 and a balloon 200, the balloon 200 being disposed on the bandage body 100. The balloon 200 has a cavity, and the balloon 200 is capable of inflating to increase the volume of the cavity. The side of the balloon 200 opposite to the bandage body 100 is the hemostatic surface 201.

[0042] The bandage body 100 can be used to wrap around a patient's body. It can be secured to the patient's body by wrapping, knotting, or other methods. Alternatively, after the bandage body 100 is applied, it can be further secured to the patient's body using tape or similar materials. In some implementations, the bandage body 100 may also have built-in connectors to facilitate its fixation. For example, as... Figure 1 As shown, the two ends of the bandage body 100 can be connected to connectors 130. When the bandage body 100 is wrapped around the patient's body, the connectors 130 at both ends are connected to each other to fix the bandage body 100. Specifically, the connectors 130 can be adhesive strips, Velcro, buckles, etc.

[0043] After a hemostatic bandage is applied to a wound, the balloon 200 can be inflated by filling its cavity with gas, liquid, or other substances to compress the wound. Specifically, after the hemostatic bandage is secured to the patient, the balloon 200 is positioned inside the bandage body 100 (i.e., the side of the bandage body 100 facing the wound). Thus, when the bandage is applied to the patient, the bandage body 100 can restrain the balloon 200. When the balloon 200 is inflated, it conforms to the wound and applies pressure to it. The balloon 200 can be made of polymer materials, specifically elastic materials such as rubber, plastic, silicone, or latex.

[0044] The balloon 200 typically has one side wall connected to the bandage body 100, while the other side wall, opposite to this side wall, faces the wound. The outer surface of this wound-facing side wall is the hemostatic surface 201; in other words, the hemostatic surface 201 is the side of the balloon 200 that faces away from the bandage body. The center of the hemostatic surface 201 usually roughly corresponds to the center of the wound, and the size of the hemostatic surface 201 is usually larger than the size of the wound, so that the hemostatic bandage can achieve a better hemostatic effect under the action of the balloon 200.

[0045] The hemostatic surface 201 includes a first region 2041 and a second region 2042. The first region 2041 and the second region 2042 are adjacent. The hydrophilicity of the first region 2041 is greater than that of the second region 2042. The first region 2041 is located at the center of the hemostatic surface 201.

[0046] It should be noted that the center of the hemostatic surface 201 refers to the center of the hemostatic surface 201 and the area surrounding the center. The first region 2041 is usually in direct contact with the wound. Hydrophilicity and hydrophobicity are relative concepts; the stronger the hydrophobicity, the weaker the hydrophilicity, and vice versa. Generally, the stronger the hydrophilicity, the smaller the contact angle between the liquid (including blood) and the material surface, making it easier for the liquid to remain and accumulate on the material surface. Conversely, the weaker the hydrophilicity, the smaller the contact angle between the liquid and the material surface, making it easier for the liquid to detach from the material.

[0047] In one implementation, such as Figure 1 As shown, the first region 2041 is located in the central region of the hemostatic surface 201, and the second region 2042 is disposed around the first region 2041. The second region 2042 is located radially outside the first region 2041, and the second region 2042 is adjacent to the first region 2041 radially upward. Here, radial refers to the radial direction r of the second region 2042.

[0048] In another implementation, such as Figure 2 As shown, the first region 2041 is located in the central region of the hemostatic surface 201, and at least two second regions 2042 are located on either side of the first region 2041, with the first region 2041 situated between the two second regions 2042. The first region 2041 and the second region 2042 are adjacent in the length direction. Here, the length direction refers to the length direction d of the second region 2042. It can be understood that in other embodiments, the first region 2041 and the second region 2042 may also be adjacent in the height direction h.

[0049] The difference in hydrophilicity between the first region 2041 and the second region 2042 can be achieved through a hydrophilic coating or a hydrophobic coating. For example, in one embodiment, a first hydrophilic coating is provided in the first region 2041 and a second hydrophilic coating is provided in the second region 2042, wherein the contact angle of the first hydrophilic coating is larger than the contact angle of the second hydrophilic coating. In another embodiment, a first hydrophobic coating is provided in the first region 2041 and a second hydrophobic coating is provided in the second region 2042, wherein the contact angle of the first hydrophobic coating is larger than the contact angle of the second hydrophobic coating. In yet another embodiment, a hydrophilic coating is provided in the first region 2041 and a hydrophobic coating is provided in the second region 2042, wherein the contact angle of the hydrophilic coating is larger than the contact angle of the hydrophobic coating.

[0050] It should be noted that for hydrophilic coatings, the contact angle is typically less than 90 degrees, while for hydrophobic coatings, the contact angle is typically greater than 90 degrees. It is understood that in some other embodiments, a superhydrophilic coating can replace the hydrophilic coating, and a superhydrophobic coating can replace the hydrophobic coating, wherein the contact angle of the superhydrophilic coating is less than 5 degrees, and the contact angle of the superhydrophobic coating is greater than 150 degrees.

[0051] It should be noted that when a hydrophilic layer is provided in the first region 2041, a hydrophobic layer may not be provided in the second region 2042, meaning the original interface of the second region 2042 can be retained. In this case, due to the hydrophilic layer in the first region 2041, a difference in hydrophilicity between the first region 2041 and the second region 2042 can be created in the hemostatic surface 201. Alternatively, a hydrophobic layer may be provided in the second region 2042. In this case, the difference in hydrophilicity between the second region 2042 and the first region 2041 can be increased due to the presence of both hydrophilic and hydrophobic layers. Similarly, when a hydrophobic layer is provided in the second region 2042, a hydrophilic layer may or may not be provided in the first region 2041.

[0052] It should be noted that in this embodiment, the hydrophilicity or hydrophobicity of the edge and center of the hemostatic surface 201 can be tested by methods such as contact angle test or Zeta potential (Zeta is also known as Zeta potential, which refers to the potential of the shear surface) analysis.

[0053] According to this embodiment, the hemostatic bandage can increase the volume of the balloon 200 by filling its cavity with gas or other substances. When using the hemostatic bandage, the hemostatic surface 201 of the balloon 200 adheres to the wound. When the balloon 200 is inflated, it can apply pressure to the wound to stop bleeding. Simultaneously, the first region 2041 is more hydrophilic than the second region 2042. Since liquids tend to migrate towards areas with stronger hydrophilicity, the retention time of blood on the hemostatic surface 201 can be delayed, thereby promoting coagulation. This embodiment, through the combination of the balloon 200 and the hydrophilicity of the hemostatic surface 201, improves the hemostatic efficiency and effectiveness of the bandage for bleeding wounds, reduces the workload of frequent bandage changes, and is beneficial to the patient's wound recovery.

[0054] Optionally, a coagulation material may be provided in the first region 2041 of this embodiment to improve the hemostatic effect. The coagulation material may be coagulation fibrin, coagulation microspheres, or coagulation drugs.

[0055] In some embodiments, the hemostatic surface 201 further includes a unidirectional fluid-guiding structure 202, wherein the unidirectional fluid-guiding structure 202 has a greater hydrophilicity in the first region 2041 than in the second region 2042.

[0056] The unidirectional fluid guiding structure 202 is a structure that guides blood flow in one direction. In this embodiment, the unidirectional fluid guiding structure 202 has the function of causing blood to tend to flow from the edge of the second region 2042 to the center of the first region 2041.

[0057] In this process, the hydrophilicity of the unidirectional hydrophobic structure 202 increases progressively from the outer edge of the second region 2042 to the center of the first region 2041. This creates a gradual wetting gradient effect from the outer edge of the second region 2042 to the center of the first region 2041. Blood at any position on the hemostatic surface 201 will tend to flow towards the center of the hemostatic surface 201 due to the difference in hydrophilicity between its location and its adjacent positions. This slows down the blood flow rate, prolongs the blood retention time on the hemostatic surface, promotes coagulation, and improves the hemostatic effect.

[0058] In this embodiment, the unidirectional flow-guiding structures at different locations on the hemostatic surface 201 can be coating structures. The specific differences in hydrophilicity and hydrophobicity can be obtained by applying different hydrophobic or hydrophilic coatings to the hemostatic surface 201. For example, in one embodiment, a hydrophobic layer can be coated at the edge of the hemostatic surface 201, and a hydrophilic layer can be coated at the center of the hemostatic surface 201, so that the hydrophilicity at the edge of the hemostatic surface 201 is less than that at the center. The hydrophobic layer can be PDMS, paraffin, etc., and the hydrophilic layer can be PEG, polyacrylic acid, etc. Correspondingly, the hemostatic surface 201 can also be divided into multiple regions from the edge to the center, and hydrophobic layers with different hydrophobicities can be coated in each of these regions to achieve a gradual increase in the hydrophilicity of the hemostatic surface 201 from the edge to the center.

[0059] Optionally, the bandage body 100 of this embodiment may include a bandage body 110 and an elastic band 120. The elastic band 120 is connected to the bandage body 110, and the balloon 200 is disposed on the elastic band 120 and located on the side of the elastic band 120 away from the bandage body 110.

[0060] The elastic band 120 is an elastic band that makes the bandage body 100 elastic at that location. The elastic band 120 can be connected to a restraint member on the bandage body 100. Specifically, in this embodiment, as... Figure 1 As shown, the elastic band 120 is connected to the bandage body 100, and the balloon 200 is disposed on the elastic band 120. When the hemostatic bandage is fastened, the elastic band 120 is tightened so that the balloon 200 fits the location of the wound. At the same time, due to the tension applied to the balloon 200 by the elastic band 120, the balloon 200 is prevented from expanding outwards from the hemostatic bandage when it expands, so that the balloon can expand more easily towards the location of the wound.

[0061] Example 2

[0062] The difference between the hemostatic bandage provided in this embodiment and that in Embodiment 1 is that, as Figures 2 to 9 As shown, the unidirectional fluid guiding structure 202 of this embodiment includes a plurality of protrusions 203, which are spaced apart on the hemostatic surface 201.

[0063] In this embodiment, through the structural design of the protrusion 203, the hydrophilicity of the center of the hemostatic surface 201 is greater than that of the edge of the hemostatic surface 201. The protrusion 203 in this embodiment exhibits a micro-patterned structure, that is, the width of the protrusion 203 and the spacing between two adjacent protrusions 203 are micrometers in size. The structural dimensions of the protrusion 203 in this embodiment can be observed using an electron microscope or a scanning electron microscope. The protrusion 203 can be cylindrical, cuboid, or triangular prism in shape. The protrusion 203 can be formed by coating a hydrophilic or hydrophobic layer on the surface of the balloon 200, followed by laser etching or imprinting of the corresponding coating.

[0064] In some embodiments, such as Figure 3 and Figure 4 As shown, along the direction from the edge of the hemostatic surface 201 to the center of the hemostatic surface 201, the height L of the protrusion 203 near the edge of the hemostatic surface 201 is greater than the height L of the protrusion 203 near the center of the hemostatic surface 201.

[0065] Here, the protrusion 203 refers to a structure that protrudes from the surface of the hemostatic surface 201. The height L of the protrusion 203 refers to the distance between the end of the protrusion 203 away from the hemostatic surface 201 and the hemostatic surface 201.

[0066] like Figure 3 and Figure 4 As shown, multiple protrusions 203 can be columnar structures, and are arrayed on the hemostatic surface 201. Any two adjacent protrusions 203 are spaced apart, forming a grid-like structure. The spacing H between two adjacent protrusions 203 is between 20 micrometers and 200 micrometers, specifically 20 micrometers, 40 micrometers, 50 micrometers, 80 micrometers, 90 micrometers, 100 micrometers, 150 micrometers, 180 micrometers, and 200 micrometers. Along the first direction D, the height L of the protrusion 203 at the center of the hemostatic surface 201 is less than the height L of the protrusions 203 at the edge of the hemostatic surface 201. The height L is between 2 micrometers and 30 micrometers, specifically 2 micrometers, 5 micrometers, 10 micrometers, 15 micrometers, 20 micrometers, 25 micrometers, and 30 micrometers.

[0067] It is understandable that, for the micro-pattern, i.e., the protrusion 203, within a certain height range, the height of the protrusion 203 is directly proportional to the contact angle between the hemostatic surface 201 and the blood. The greater the height of the protrusion 203, the larger the contact angle between the blood and the hemostatic surface 201, thus making the hemostatic surface 201 more hydrophobic (i.e., less hydrophilic). The height difference of the protrusions 203 creates a hydrophobic difference on the hemostatic surface 201. This implementation can also be combined with the application of a hydrophilic or hydrophobic layer on the hemostatic surface 201. This further amplifies the hydrophobic difference by adding the protrusions 203 to the hemostatic surface 201, thereby increasing the guiding effect of the hemostatic surface 201 on the blood, further promoting the flow of blood towards the center of the hemostatic surface 201, and improving the hemostatic effect.

[0068] It should be noted that the arrangement of the protrusions 203 in this embodiment is not limited to the protrusions 203 being dispersed in an array. For example, as Figure 5 and Figure 6 As shown, the protrusion 203 can also be arranged in a ring shape, and along the direction from the edge of the hemostatic surface 201 to the center of the hemostatic surface 201, the height of the protrusion 203 near the edge of the hemostatic surface 201 is greater than the height of the protrusion 203 near the center of the hemostatic surface 201.

[0069] It is understood that in some embodiments, the height of the protrusion 203 may be set to increase from the center of the hemostatic surface 201 to the edge of the hemostatic surface 201 to increase the difference in hydrophobicity or hydrophilicity of the interface, thereby further enhancing the guiding effect of the hemostatic surface 201 on blood and improving the hemostatic effect.

[0070] In some embodiments, the cross-sectional area of ​​the protrusion 203 near the edge of the hemostatic surface 201 is greater than the cross-sectional area of ​​the protrusion 203 near the center of the hemostatic surface 201.

[0071] The cross-sectional area of ​​the protrusion 203 refers to the cross-sectional area of ​​the protrusion 203 parallel to the hemostatic surface 201. The cross-sectional area of ​​the protrusion 203 at the center of the hemostatic surface 201 is smaller than the cross-sectional area of ​​the protrusion 203 at the edge of the hemostatic surface 201.

[0072] like Figure 5 and Figure 7 As shown, any one of the protrusions 203 can be in a ring shape, with the protrusion 203 surrounding the center of the hemostatic surface 201. Multiple protrusions 203 are arranged sequentially at intervals along the direction from the center to the edge of the hemostatic surface 201 (the radial direction of the hemostatic surface 201). The cross-sectional area of ​​the outer protrusion 203 is larger than that of the inner protrusion 203.

[0073] like Figure 8As shown, the protrusions 203 have a strip-like structure. Multiple protrusions 203 are arranged radially around the center of the hemostatic surface 201. Multiple protrusions 203 are also arranged in a circular array with equal included angles around the center of the hemostatic surface 201. The protrusions 203 extend from the edge of the hemostatic surface 201 towards its center, giving the unidirectional fluid guiding structure 202 a spoke-like structure. The width W of the protrusions 203 near the edge of the hemostatic surface 201 is larger, while the width W of the protrusions 203 near the center of the hemostatic surface 201 is smaller, so that the cross-sectional area of ​​the protrusions 203 near the edge of the hemostatic surface 201 is larger than that of the protrusions 203 near the center of the hemostatic surface 201.

[0074] In this embodiment, the surface area of ​​the protrusion 203 at the center of the hemostatic surface 201 is smaller than that of the protrusion 203 at the edge of the hemostatic surface 201. The "end face" refers to the end face of the protrusion 203 furthest from the hemostatic surface 201. It can be understood that, within a certain range, the larger the surface area of ​​the protrusion 203, the larger its contact angle with blood. A larger contact angle results in stronger hydrophobicity and weaker hydrophilicity. Therefore, through the difference in the surface area of ​​the protrusions 203, a difference in hydrophobicity is created between the center and the areas on either side of the hemostatic surface 201, further increasing the difference in hydrophilicity and hydrophobicity of the sidewall surface structure and enhancing the guiding effect of the hemostatic surface 201 on blood.

[0075] It should be noted that the protrusion 203 in this embodiment is not limited to the form of annular protrusion and strip protrusion, but can also be a plurality of dispersed protrusions in an array. Among the plurality of array protrusions, the cross-sectional area of ​​the protrusion 203 near the edge of the hemostatic surface 201 is greater than the cross-sectional area of ​​the protrusion 203 near the center of the hemostatic surface 201.

[0076] Optional, such as Figure 10 As shown, the spacing H between the protrusions 203 at the center of the hemostatic surface 201 can also be greater than the spacing H between the protrusions 203 at the edge of the hemostatic surface 201. Specifically, multiple protrusions 203 can be arranged sequentially at intervals along the direction from the edge of the hemostatic surface 201 to the center of the hemostatic surface 201; along the direction from the edge of the hemostatic surface 201 to the center of the hemostatic surface 201, the spacing H between adjacent protrusions 203 increases.

[0077] The distance between two adjacent protrusions 203 is inversely proportional to the contact angle of blood on the hemostatic surface 201. The larger the distance H, the smaller the contact angle. This results in the hydrophilicity of the hemostatic surface 201 at its center being greater than that at its edge, further increasing the hydrophilicity-hydrophobicity difference of the sidewall surface structure and enhancing the guiding effect of the hemostatic surface 201 on blood. The distance H between two adjacent protrusions 203 can be between 0.5 and 3 times the width of the protrusion 203. Specifically, it can be set to 0.5, 1, 1.5, 2, 2.5, or 3 times the diameter of the adjacent protrusion 203.

[0078] It should be noted that the spacing H of the protrusions 203, the height L of the protrusions 203, and the difference in the cross-sectional area of ​​the protrusions 203 can also be superimposed to enhance the hemostatic effect of the hemostatic surface 201. Specifically, for example... Figures 4 to 6 As shown, while the cross-sectional area of ​​the protrusion 203 near the edge of the hemostatic surface 201 is greater than the cross-sectional area of ​​the protrusion 203 near the center of the hemostatic surface 201, the height of the protrusion 203 near the edge of the hemostatic surface 201 can also be greater than the height of the protrusion 203 near the center of the hemostatic surface 201, and the distance H between the protrusions 203 at the center of the hemostatic surface 201 is greater than the distance H between the protrusions 203 at the edge of the hemostatic surface 201. Figure 7 and Figure 8 As shown, the cross-sectional area of ​​the protrusion 203 near the edge of the hemostatic surface 201 is greater than the cross-sectional area of ​​the protrusion 203 near the center of the hemostatic surface 201. At the same time, the height L of the protrusion 203 near the edge of the hemostatic surface 201 can also be greater than the height L of the protrusion 203 near the center of the hemostatic surface 201.

[0079] It should be noted that, Figure 4 , Figure 6 and Figure 10 Arrow B in the diagram indicates the direction of blood flow guided by the unidirectional fluid-guiding structure.

[0080] Example 3

[0081] The main difference between the hemostatic bandage provided in this embodiment and those in Embodiments 1 and 2 is that, as Figures 11 to 14As shown, the balloon 200 in this embodiment includes a first balloon 210 and a second balloon 220 connected to each other. The first balloon 210 has a first cavity 211 and can expand to increase the volume of the first cavity 211. The second balloon 220 has a second cavity 221 and can expand to increase the volume of the second cavity 221. The elastic modulus of the second balloon 220 is less than that of the first balloon 210. The balloon 200 also includes a control component 300, which is disposed between the first cavity 211 and the second cavity 221 and is used to control the connection or disconnection between the first cavity 211 and the second cavity 221.

[0082] Please refer to Figure 11 , Figure 11 The diagram schematically illustrates a balloon 200 of some embodiments of this application with its first cavity 211 and second cavity 221 disconnected from each other. The first cavity 211 is a sealed cavity formed by the first balloon body 210, which can also be an inflatable balloon body. The expansion process of the first balloon body 210 can involve filling the first cavity 211 with a fluid such as gas or liquid, causing the first balloon body 210 to expand outward under the pressure difference between the first cavity 211 and the outside. To enable the first balloon body 210 to expand, it can be made of a polymer material, specifically elastic materials such as rubber, plastic, silicone, or latex. The second cavity 221 is a sealed cavity formed by the second balloon body 220. The expansion process of the second balloon body 220 can involve filling the second cavity 221 with gas or liquid, causing the second balloon body 220 to expand outward under the pressure difference between the first cavity 211 and the outside. In order for the second capsule 220 to expand, the second capsule 220 can be a polymer material, specifically elastic materials such as rubber, plastic, silicone, latex, etc.

[0083] like Figure 11 As shown, the first sac 210 and the second sac 220 can have common parts. Specifically, the sac 200 has a partition 230, with a first cavity 211 and a second cavity 221 on each side, and a second cavity on the other side. The first sac 210 is connected to the bandage body 100, and the side of the second sac 220 away from the first sac 210 can serve as a hemostatic surface 201.

[0084] The control component 300 is used to control the connection and disconnection between the first cavity 211 and the second cavity 221. The control component 300 can be configured in various ways, as long as it enables switching between connection and disconnection between the first cavity 211 and the second cavity 221. For example, a connecting pipe can be provided between the first cavity 211 and the second cavity 221, and the control component 300 can be a control valve located on the connecting pipe to control its connection and disconnection, thus controlling the connection or disconnection of the first cavity 211 and the second cavity 221. Alternatively, a connecting hole 240 can be provided between the first cavity 211 and the second cavity 221, and the control component 300 can block or avoid the connecting hole 240 to control the connection or disconnection of the first cavity 211 and the second cavity 221. When the first cavity 211 and the second cavity 221 are connected, the pressure between the first cavity 211 and the second cavity 221 tends to be the same, and the first bladder 210 and the second bladder 220 usually expand simultaneously. When the first cavity 211 and the second cavity 221 are disconnected, the first bladder 210 and the second bladder 220 can expand independently.

[0085] In this embodiment, when the hemostatic bandage is used, gas or liquid can be injected into the first sac 210 and / or the second sac 220 to inflate the balloon 200. Specifically, when the hemostatic bandage is not in use, the balloon 200 may not be injected with liquid or gas, i.e., the balloon 200 is deflated. When the hemostatic bandage needs to be used, the first sac 210 and / or the second sac 220 of the balloon 200 are injected with liquid or gas to inflate the balloon 200. Alternatively, the hemostatic bandage may already have the first sac 210 and / or the second sac 220 injected with gas or liquid when not in use, i.e., the balloon 200 has already been partially or completely inflated when not in use.

[0086] According to the hemostatic bandage of this embodiment, the first cavity 211 of the first sac 210 and the second cavity 221 of the second sac 220 are connected or disconnected by the control component 300, so that the first sac 210 or the second sac 220 can be expanded and used independently or simultaneously. In this way, the operator can reasonably select the sac to expand according to different patients, so that the overall volume of the balloon 200 is adjustable, improving the applicability of the hemostatic bandage to different patients.

[0087] For example, when bandaging a patient's wound, the first cavity 211 and the second cavity 221 of the balloon 200 can be disconnected first, and the first sac 210 can be filled with gas. If the balloon 200 cannot meet the need for pressure to stop bleeding in this state, the control component 300 can be used to connect the first cavity 211 and the second cavity 221, and the gas can enter the second cavity 221 from the first cavity 211, causing the second sac 220 to expand, so that the overall volume of the balloon 200 is adjustable. When the first cavity 211 and the second cavity 221 are connected, the amount of air can be increased into the first cavity 211, causing the second bladder 220 to expand, thereby increasing the overall volume of the balloon 200. Alternatively, the difference in elastic modulus between the first bladder 210 and the second bladder 220 can be used to make the volume change of the second bladder 220 (which is also the volume change of the second cavity 221) greater than the volume change of the first bladder 210 (which is also the volume change of the first cavity 211) when the same amount of gas is used.

[0088] The first bladder 210 may be provided with a one-way inflation port, through which air can be injected into the first bladder 210 by using an air pump and an inflation needle. The gas injected into the first cavity 211 of the first bladder 210 is compressed due to the restriction effect of the first bladder 210, making the air pressure inside the first bladder 210 greater than the external air pressure, thereby causing the first bladder 210 to expand.

[0089] According to some embodiments of this application, optionally, the first bladder 210 is pre-stored with gas, the gas makes the pressure inside the first cavity 211 greater than the external pressure, and when the first cavity 211 and the second cavity 221 are disconnected, the pressure inside the first cavity 211 is greater than the pressure inside the second cavity 221.

[0090] The gas pre-stored in the first capsule 210 can be air. When gas is pre-stored in the first capsule 210, the gas should be a high-pressure gas with a relatively high pressure. The gas fills the first cavity 211, causing the first capsule 210 to be in an expanded state under the action of the filled gas. The control component 300 disconnects the first cavity 211 from the second cavity 221. At this time, the second cavity 221 of the second capsule 220 may contain a small amount of gas or no gas, that is, the pressure inside the second capsule 220 can be basically the same as the outside pressure.

[0091] By pre-filling the first capsule 210 with gas, the hemostatic bandage can be used directly and is easy to operate. When using the hemostatic bandage, the balloon 200 is first wrapped around the patient's body with the first capsule 210 inflated. Then, it is observed whether the balloon 200 can effectively stop the bleeding of the patient's wound. If it cannot effectively stop the bleeding of the patient's wound, the control component 300 can be used to connect the first cavity 211 and the second cavity 221, so that the gas in the first cavity 211 can enter the second cavity 221, causing the second capsule 220 to expand.

[0092] During the elastic deformation stage, the stress and strain of a material are directly proportional (i.e., they conform to Hooke's Law). The proportionality coefficient can be called the elastic modulus. The larger the elastic modulus, the smaller the deformation of the material under the same stress. The smaller the elastic modulus, the larger the deformation of the material under the same stress.

[0093] Specifically, the first capsule 210 and the second capsule 220 can be made of different materials, such that the elastic modulus of the first capsule 210 is greater than that of the second capsule 220. Alternatively, the first capsule 210 and the second capsule 220 can be made of the same material, but the thickness of the first capsule 210 is designed to be greater than that of the second capsule 220, thereby making the elastic modulus of the first capsule 210 greater than that of the second capsule 220. When the first capsule 210 and the second capsule 220 have a shared partition 230, the partition 230 can have the same elastic modulus as the first capsule 210, so that when the second capsule 220 expands, it can mainly expand unidirectionally away from the first capsule 210.

[0094] In this embodiment, by setting the elastic modulus of the second bladder 220 to be less than that of the first bladder 210, the second bladder 220 expands more easily than the first bladder 210. Under the same inflation volume, the deformation of the second bladder 220 is greater than that of the first bladder 210. Thus, when gas can be pre-stored in the first bladder 210 and the expansion volume of the first bladder 210 is insufficient for applying pressure to stop bleeding from the wound, the control component 300 connects the first cavity 211 and the second cavity 221. Gas enters the second cavity 221 from the first cavity 211, causing the second bladder 220 to expand. The total expansion volume of the first bladder 210 and the second bladder 220 is greater than the expansion volume of the first bladder 210 when the connection between the first cavity 211 and the second cavity 221 is broken. That is, the high-pressure airflow entering the second bladder 220 increases the overall volume of the balloon 200. In other words, after the first bladder 210 and the second bladder 220 are connected, the second bladder 220 can expand rapidly under the pressure of the airflow (the airflow formed by the gas in the first cavity 211) to compress the wound and achieve the effect of hemostasis. The overall volume of the balloon 200 when the first cavity 211 and the second cavity 221 are connected is greater than the overall volume of the balloon 200 when the first cavity 211 and the second cavity 221 are disconnected, so that the balloon 200 can fit better to the patient's wound.

[0095] In this embodiment, by setting the elastic modulus of the second balloon 220 to be less than that of the first balloon 210, the balloon 200 does not require an external inflation device. The size of the balloon 200 can be adjusted by controlling the control component 300 without additional inflation, making the use of the hemostatic bandage more convenient and adaptable.

[0096] Optional, refer to Figures 11 to 14 As shown, in some embodiments, the balloon 200 is provided with a communication hole 240 between the first cavity 211 and the second cavity 221, and the control component 300 is provided with the communication hole 240 and is used to control the opening or closing of the communication hole 240.

[0097] In this embodiment, the balloon 200 can be an integral structure. The first balloon body 210 and the second balloon body 220 share a common partition 230. A connecting hole 240 can be disposed on the partition 230. One end of the connecting hole 240 communicates with the first cavity 211, and the other end of the connecting hole 240 communicates with the second cavity 221. A control component 300 can be disposed within the connecting hole 240 to control the opening or closing of the connecting hole 240. Alternatively, the control component 300 can be disposed at the end of the connecting hole 240 to open or close the connecting hole 240 by blocking or avoiding the end of the connecting hole 240. When the control component 300 opens the connecting hole 240, the first cavity 211 and the second cavity 221 are connected; when the control component 300 closes the connecting hole 240, the first cavity 211 and the second cavity 221 are disconnected.

[0098] In this embodiment, the first cavity 211 and the second cavity 221 are connected or disconnected by setting a connecting hole 240 in cooperation with the control component 300, which is simple in structure.

[0099] Additionally, it should be noted that in this embodiment, the second capsule 220 can be used as the part that contacts the wound. When the connecting hole 240 is provided, its diameter is typically small. Airflow (the airflow formed by the gas in the first cavity 211) enters the second capsule 220 after passing through the connecting hole 240. As the airflow passes through the small-area connecting hole 240, a Joule-Thomson effect (i.e., throttling cooling) can be formed, causing the airflow temperature to drop and creating a cooling sensation on the sidewall of the second capsule 220. This achieves hemostasis through compression while simultaneously reducing pain at the wound. Furthermore, the low temperature promotes blood coagulation and facilitates hemostasis. The flow area of ​​the connecting hole 240 is related to the air pressure within the first cavity 211. The ratio of air pressure to the flow area of ​​the connecting hole 240 can be set as needed to achieve a better Joule-Thomson effect.

[0100] The Joule-Thomson effect is a phenomenon in which the temperature of a gas changes with pressure during throttling. The process of gas expanding through a porous plug or throttling valve is called adiabatic throttling expansion. In this embodiment, the connecting hole 240 is equivalent to forming a throttling valve.

[0101] In one specific embodiment, continue referring to 11 to Figure 14 As shown, the control component 300 includes a drive member 310 and a control member 320. The control member 320 is disposed in the communication hole 240. One end of the drive member 310 is connected to the control member 320, and the other end of the drive member 310 extends out of the bandage body 100. The drive member 310 is used to drive the control member 320 to control the opening and closing between the first cavity 211 and the second cavity 221.

[0102] The driving component 310 can be a pull rope or a pull rod, etc. In this embodiment, the driving component 310 is described as a pull rod. The control component 320 is a switch mechanism that directly controls the opening or closing of the connecting hole 240.

[0103] In one implementation, the control element 320 can be inserted from the first cavity 211 into the communicating hole 240 to close the communicating hole 240. At this time, one end of the drive element 310 extends into the first bladder 210 and is located within the first cavity 211 to connect with the control element 320, while the other end of the drive element 310 extends out of the first bladder 210 and is located outside the balloon 200. Figure 10 and Figure 11 As shown, the control component 320 can block the connecting hole 240, disconnecting the first cavity 211 from the second cavity 221; the operator can pull the drive component 310 to make the drive component 310 move according to... Figure 12 As shown, the movement reaches the direction of arrow A (to the left), causing the control element 320 to move away from the end of the connecting hole 240 that communicates with the first cavity 211, as... Figure 12 and Figure 13 As shown, at this time, the connecting hole 240 is connected to the first cavity 211, and the first cavity 211 is connected to the second cavity 221 through the connecting hole 240. The gas in the first cavity 211 can flow to the second cavity 221 along arrow C.

[0104] It should be noted that the control element 320 can also be inserted into the communicating hole 240 from the second cavity 221 to close the communicating hole 240. In this case, one end of the drive element 310 can extend into the second pouch 220 and connect with the drive element 310. Typically, one of the first pouch 210 and the second pouch 220 is positioned close to the wound, and the other is positioned away from the wound. The control element 320 can be positioned in the pouch away from the wound to facilitate the operator's operation. This embodiment mainly uses the example of the first pouch 210 being connected to the bandage body 100 and the second pouch 220 acting on the wound for explanation.

[0105] In this embodiment, the connection or disconnection of the first cavity 211 and the second cavity 221 is controlled by the driving component 310 acting on the control component 320. One end of the driving component 310 is located on the outside of the bandage body 100, which facilitates the operator's control operation of the control component 300.

[0106] In one embodiment, the drive member 310 includes a pull rod, and the control member 320 includes an elastic plug connected to the pull rod. The elastic plug is used to block the connecting hole 240.

[0107] Specifically, one end of the elastic sealing member can extend into the connecting hole 240 to block the connecting hole 240, and the other end of the elastic sealing member is connected to the driving member 310 (i.e., the pull rod). The driving member 310 can pull the elastic sealing member out of the connecting hole 240, so that the first bladder 210 and the second bladder 220 are connected, and the high-pressure airflow in the first bladder 210 enters the second bladder 220.

[0108] The flexible sealing component can be made of materials such as rubber, silicone, latex, or soft plastic.

[0109] In this embodiment, the connecting hole 240 is sealed by an elastic sealing element, which can achieve a good sealing effect.

[0110] In a specific implementation, such as Figure 12 and Figure 14 As shown, the elastic plug includes an elastic annular structure 321 and an elastic sealing part 322. The elastic annular structure 321 surrounds the circumferential sidewall of the pull rod, achieving a fixed connection between the elastic plug and the pull rod. The elastic sealing part 322 is an integral structure with the elastic annular structure 321, and is connected to the end of the elastic annular structure 321 away from the pull rod, and is used to insert into the connecting hole 240. The radial dimension of the elastic annular structure 321 along the connecting hole 240 is larger than the diameter of the connecting hole 240, and also larger than the radial dimension of the elastic sealing part 322 along the connecting hole 240. Thus, when the elastic plug seals the connecting hole 240, the elastic annular structure 321 can seal at the end of the connecting hole 240, improving the sealing performance of the elastic plug and allowing for precise positioning of the elastic plug within the connecting hole 240. The radial dimension of the elastic sealing part 322 along the connecting hole 240 can be slightly larger than the diameter of the connecting hole 240, so that the elastic sealing part 322 can be interference-fitted into the connecting hole 240, so that the elastic sealing part has good sealing performance for the connecting hole 240.

[0111] In some embodiments, such as Figures 11 to 14 As shown, the driving component 310 may also be provided with an inflation channel 312, which is connected to the first cavity 211 or the second cavity 221, and a sealing plug 313 is detachably provided in the inflation channel 312.

[0112] The inflation channel 312 can extend through both ends of the drive member 310, that is, connect the end of the drive member 310 located outside the bandage body 100 and the end of the drive member 310 located inside the balloon 200, so that air can be inflated into the balloon 200 through the inflation channel 312. Specifically, the inflation channel 312 can be connected to the first cavity 211, and air can be inflated into the first cavity 211 through the inflation channel 312; or the inflation channel 312 can be connected to the second cavity 221, and air can be inflated into the second cavity 221 through the inflation channel 312.

[0113] Reference Figure 11 and Figure 13 As shown, in this embodiment, the elastic sealing part 322 is provided with a vent 323 communicating with the inflation channel 312, and the elastic sealing part 322 is provided with an outlet 324 communicating with the vent 323. When the elastic sealing member is sealed in the connecting hole, the outlet 324 on the elastic sealing part 322 is located in the second cavity 221. At this time, air can be inflated into the second cavity 221 through the inflation channel 312. When the elastic sealing member is completely located in the first cavity 211, the elastic sealing part 322 can abut against the end of the connecting hole 240 facing the first cavity 211, so that the first cavity 211 and the second cavity 221 are sealed, and air can be vented into the first cavity 211 at this time.

[0114] It should be noted that an outlet 324 connected to the inflation channel 312 can also be directly provided on the drive member 310. For example, one end of the drive member 310 extends into the first chamber, and an outlet 324 is provided on the drive member 310 to inflate the first cavity 211.

[0115] The sealing plug 313 can be located at the end of the inflation channel 312 outside the bandage body 100. The sealing plug 313 can be a rubber, silicone, or a check valve. When inflation is not required, the sealing plug 313 seals the inflation channel 312. When the bladder needs to be inflated, the sealing plug 313 can be removed, or a one-way sealing structure can be provided on the sealing plug 313 to inflate the balloon 200. After the balloon 200 is inflated, the sealing plug 313 blocks the inflation channel 312 to prevent the high-pressure airflow inside the balloon 200 from overflowing.

[0116] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hemostatic bandage, characterized in that, include: The bandage itself; A balloon is disposed on the bandage body. The balloon includes a hemostatic surface disposed opposite to the bandage body. The hemostatic surface includes a first region located at the center of the hemostatic surface and a second region adjacent to the first region. The first region has a higher hydrophilicity than the second region. The balloon includes a first balloon body and a second balloon body connected together. The first balloon body is connected to the bandage body, and the side of the second balloon body away from the first balloon body serves as the hemostatic surface. The first balloon body has a first cavity, which can be expanded to increase the volume of the first cavity. The second balloon body has a second cavity, which can be expanded to increase the volume of the second cavity. The elastic modulus of the second balloon body is less than that of the first balloon body. The balloon also includes a control component disposed between the first cavity and the second cavity, used to control the connection or disconnection between the first cavity and the second cavity.

2. The hemostatic bandage according to claim 1, characterized in that, The second region surrounds the first region, the first region has a hydrophilic layer, and the second region has a hydrophobic layer.

3. The hemostatic bandage according to claim 1, characterized in that, The first region is located between two adjacent second regions.

4. The hemostatic bandage according to claim 1, characterized in that, Coagulation materials are provided in the first area.

5. The hemostatic bandage according to claim 1, characterized in that, The hemostatic surface includes a one-way fluid-guiding structure, wherein the hydrophilicity of the one-way fluid-guiding structure is greater in the first region than in the second region, and the hydrophilicity of the one-way fluid-guiding structure increases from the edge of the hemostatic surface to the center of the hemostatic surface.

6. The hemostatic bandage according to claim 5, characterized in that, The unidirectional fluid guiding structure includes a plurality of protrusions, which are spaced apart on the hemostatic surface. Along the direction from the edge of the hemostatic surface to the center of the hemostatic surface, the height of the protrusions near the edge of the hemostatic surface is greater than the height of the protrusions near the center of the hemostatic surface, and / or the cross-sectional area of ​​the protrusions near the edge of the hemostatic surface is greater than the cross-sectional area of ​​the protrusions near the center of the hemostatic surface, and / or the spacing between two adjacent protrusions increases.

7. The hemostatic bandage according to claim 6, characterized in that, The plurality of protrusions are arranged in a circumferential array around the center of the hemostatic surface, and the protrusions extend along the edge of the hemostatic surface toward the center of the hemostatic surface.

8. The hemostatic bandage according to claim 6, characterized in that, Each of the protrusions is arranged around the center of the hemostatic surface, and the protrusions are arranged at intervals along the direction from the center of the hemostatic surface to the edge.

9. The hemostatic bandage according to claim 1, characterized in that, The bandage body includes a band body and an elastic band, the elastic band being connected to the band body, and the balloon being disposed on the elastic band and located on the side of the elastic band opposite to the band body.

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