Pressurized wound dressing structure and pressurized wound closure device

Abstract

The present invention discloses a pressurized wound dressing structure and a pressurized wound closure device, which relate to the field of medical products. The pressurized wound dressing structure comprises a shell, an adhesive member and a dressing assembly, the bottom of the shell is open, the adhesive member is arranged on the edge of the opening at the bottom of the shell, and an adhesive surface for being attached to the skin surface around the wound is arranged at the bottom of the adhesive member, the dressing assembly is arranged inside the shell, and the gap between the dressing assembly and the inner wall of the shell is compressibly adjustable so that the part of the dressing assembly located at the bottom opening of the shell is squeezed outward. The present invention can make the part of the dressing assembly located at the bottom opening of the shell be squeezed outward, and then can actively apply corresponding pressure to the wound and surrounding tissues, and can achieve the functional effect of applying pressure to the local range of the wound, and then by applying a certain pressure to the wound side, it can exert a certain compression effect on the wound site.

Description

Technical Field

[0001] The present invention relates to the field of medical products, and in particular to a pressurized wound dressing structure and a pressurized wound closure device. Background Art

[0002] Conventional wound dressings are generally only used for wound protection, covering and absorbing wound exudate, and usually do not have both the function of applying pressure to the top surface of the wound and the function of pulling the wound horizontally.

[0003] Some existing dressing products for pressure bandage usually require the use of elastic tape or elastic bandage to apply pressure. The advantage is that it is simple and easy to use; its disadvantage 1 is that the pressure area is large, which can easily lead to large-scale tissue compression ischemia, which is not conducive to wound healing; disadvantage 2 is inefficiency, and it is impossible to gather effective pressure to accurately act on the damaged skin edge; disadvantage 3 is that when the damaged skin edge is uneven, there is no reference plane with shaping function for the healing of the damaged skin edge, and the wound skin edge after healing is uneven and unsightly; disadvantage 4 is that when the two sides of the damaged skin edge are not horizontally aligned, there are no appropriate measures to pull the wound skin edge together for further alignment. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a pressurized wound dressing structure capable of applying pressure to the surface of a local area of ​​a wound.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a pressurized wound dressing structure, including a shell, an adhesive piece and a dressing assembly, the bottom of the shell is open, the adhesive piece is arranged on the opening edge of the bottom of the shell, and an adhesive surface for adhering to the skin surface around the wound is arranged at the bottom of the adhesive piece. The dressing assembly is arranged inside the shell, and the gap between the dressing assembly and the inner wall of the shell is compressibly adjustable so that the part of the dressing assembly located at the bottom opening of the shell is squeezed outward.

[0006] Furthermore, the shell is a structure with an internal cavity volume that can shrink and deform.

[0007] Furthermore, the shell comprises a left sealing film and a right sealing film, and sealing strips capable of sealingly cooperating with each other are respectively arranged on the left sealing film and the right sealing film.

[0008] Furthermore, the shell includes a left baffle, a right baffle and a downward pressing top cover, the downward pressing top cover is arranged between the left baffle and the right baffle so as to be able to move up and down and adjust, and the dressing assembly is located below the downward pressing top cover.

[0009] Furthermore, the shell is a flexible sealing film, and when the fitting is adhered to the skin surface around the wound, a sealed cavity can be formed inside the shell, and the sealed cavity is connected to the outside through a vacuum tube passing through the shell; an air extraction one-way valve is arranged in the vacuum tube.

[0010] Furthermore, the dressing component is a composite dressing filler with expandable volume.

[0011] Furthermore, the composite dressing filler includes a dressing body and a spring, and the spring is arranged between the top of the shell and the dressing body or inside the dressing body.

[0012] Furthermore, the composite dressing filler includes a dressing body and an expansion bladder, the expansion bladder is arranged between the top of the shell and the dressing body or the expansion bladder is arranged inside the dressing body; the expansion bladder is connected to the outside world through a charging pipeline passing through the shell; and a charging one-way valve is arranged on the charging pipeline.

[0013] Furthermore, the composite dressing filler includes a dressing body, and the dressing body is made of a liquid-absorbing self-expanding dressing.

[0014] Furthermore, the opening edge of the bottom of the shell is connected to the middle part of the adhesive piece and divides the adhesive piece into an outer extension portion extending toward the outside of the shell and an inner extension portion extending toward the inside of the shell, and a clearance opening corresponding to the wound is provided between the inner extension portions of the adhesive piece located on both sides of the shell, and the dressing assembly arranged inside the shell can cover the wound and above the inner extension portions on both sides.

[0015] Furthermore, a stress dispersion layer is arranged between the adhesive piece and the opening edge of the bottom of the shell, and the stress dispersion layer is bonded to the upper surface of the adhesive piece. The stiffness of the stress dispersion layer is greater than the stiffness of the adhesive piece, and the opening edge of the bottom of the shell is connected to the non-edge part of the stress dispersion layer.

[0016] Furthermore, a shaping plate is arranged at the bottom of the dressing assembly, and the bottom surface of the shaping plate is a wound alignment reference plane with a flat surface.

[0017] The beneficial effect of the pressurized wound dressing structure described in the present invention is that the gap between the dressing assembly and the inner wall of the shell is compressibly adjustable, so that the portion of the dressing assembly located at the bottom opening of the shell can be squeezed outward, thereby actively applying corresponding pressure to the surface of the wound and surrounding tissues, thereby achieving the functional effect of applying pressure to the local surface of the wound, and then by applying a certain pressure to the wound side, it can exert a certain compression effect on the wound site. On the one hand, it can play a certain hemostatic effect to prevent continuous seepage of exudate, and on the other hand, by pressing the dressing to the wound site, it can improve the alignment effect on the wound, especially when a shaping plate is further provided at the bottom of the dressing assembly, the flatness and aesthetics of the wound after healing can be improved. In addition, the function of realizing the compressible and adjustable gap between the dressing component and the inner wall of the shell in the present invention can be realized by adopting various technical means from the shell and the dressing component, respectively, and can meet different needs according to their respective advantages and disadvantages; especially when a composite dressing filler capable of expansion and deformation is made of a liquid-absorbing self-expanding dressing as a dressing component, the expansion amount of the dressing can be automatically adjusted according to the amount of exudate exuded, thereby realizing feedback control of the pressure applied to the wound, so as to further improve the compression effect on the wound, reduce the amount of exudate, and realize the effect of automatic feedback adjustment of applying pressure to the wound site. In addition, by setting the opening edge of the bottom of the shell to be connected with the middle part of the adhesive, on the one hand, the influence of the stretching and pulling effect of the shell on the adhesive during the pressure application process on the adhesive firmness of the adhesive is reduced, and on the other hand, by forming a corresponding inner extension and further clamping the inner extension in the process of pressing the wound with the help of the dressing component, the adhesive effect of the adhesive can be further improved, and the problem of the adhesive falling off during the pressure application process can be prevented. In addition, by further providing a stress dispersion layer, the force F applied by the shell to the adhesive member can be further dispersed to prevent stress concentration from causing skin strain.

[0018] In addition, the present invention also provides a pressurized wound closure device, comprising the pressurized wound dressing structure described in the present invention, and also comprising a wound dressing frame, wherein the wound dressing frame comprises a pull-and-close piece, a fixing piece and a dressing fence, and a dressing placement area is formed inside the dressing fence, wherein the fixing piece is arranged along both sides of the dressing fence, and at least one pull-and-close piece is arranged corresponding to each fixing piece, wherein one end of each pull-and-close piece is connected to the corresponding fixing piece, and the other end of the pull-and-close piece is connected to a side of the dressing fence close to the corresponding fixing piece, and the distance between the fixing piece and the dressing fence can be adjusted by the pull-and-close piece, and the bottom surface of the fixing piece is arranged as a fixed adhesive surface for adhering to the skin; the pressurized wound dressing structure is arranged in the dressing placement area.

[0019] The pressurized wound closure device described in the present invention can achieve a proper shaping effect on the pressurized wound dressing structure with the help of the wound dressing frame by using the pressurized wound dressing structure in combination with the wound dressing frame, thereby preventing the pressurized wound dressing structure from being greatly deformed during the process of applying pressure to the wound site, thereby causing the wound to be stretched; in addition, it can be adhered and fixed to both sides of the wound by fixing parts, and at the same time, the skin on both sides of the wound can be pulled toward the middle by the pulling action of the pulling part, thereby ensuring that the skin edges on both sides of the wound are pulled toward the middle and aligned, and then by cooperating with the pressurized wound dressing structure to apply downward pressure to the wound site, the dual functional effects of horizontally pulling the wound and applying pressure to the wound surface can be achieved, which can improve the flatness and aesthetics of the wound after healing during the wound healing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic cross-sectional view of a pressure-type wound dressing structure when a composite dressing filler consisting of a spring and a dressing body is used;

[0021] Figure 2 for Figure 1 A schematic diagram of the compression wound dressing structure in cooperation with a wound;

[0022] Figure 3 Schematic cross-sectional view of a pressure-type wound dressing structure when a composite dressing filler consisting of an expansion bladder and a dressing body is used, wherein the expansion bladder is located above the dressing body;

[0023] Figure 4 Schematic cross-sectional view of a pressure-type wound dressing structure when a composite dressing filler consisting of an expansion bladder and a dressing body is used, wherein the expansion bladder is located inside the dressing body;

[0024] Figure 5 It is a cross-sectional schematic diagram of a pressure-type wound dressing structure when a liquid-absorbing self-expanding dressing is used as a composite dressing filler;

[0025] Figure 6 is a schematic cross-sectional view of a pressurized wound dressing structure when the shell is in a semi-ellipsoidal structure;

[0026] Figure 7 is a schematic diagram of the three-dimensional structure of the shell part;

[0027] Figure 8 is a schematic cross-sectional view of a dressing body, and a schematic structural view when an alignment reference piece is provided;

[0028] Fig. 9 This is a schematic diagram of the structure when the shell adopts a sealing film;

[0029] Fig.10 It is a schematic diagram of the structure when the housing is provided with a downward pressing top cover;

[0030] Fig.11 is a schematic diagram of the structure when the shell is a flexible sealing membrane;

[0031] Fig.12 A schematic diagram of the structure of the connection between the adhesive member and the housing when a stress dispersion layer is provided;

[0032] Fig.13 The middle is a schematic diagram of the traction state of the skin when the adhesive member adopts a stress dispersion layer with a certain rigidity;

[0033] Fig.14 The middle is a schematic diagram of the traction state of the skin when the adhesive member is a flexible member;

[0034] Fig.15 is a schematic diagram of a wound dressing framework;

[0035] Fig.16 for Fig.15 A cross-sectional view of

[0036] Marked in the figure are: pulling and closing piece 1, fixing piece 2, dressing fence 3, dressing placement area 4, fixed adhesive surface 5, left sealing film 6, right sealing film 7, sealing strip 8, left baffle 9, right baffle 10, downward pressing top cover 11, sealing cavity 12, vacuum tube 13, exhaust check valve 14, wound dressing frame 15, stress concentration area 16, adhesive piece 17, wound 18, adhesive surface 19, buckle 20, slot 21, charging check valve 22, spring 23, expansion bag 24, charging pipeline 25, extension part 26, inner extension part 27, give way 28, shaping plate 29, wound alignment reference plane 30, shell 31, dressing body 32, pressurized wound dressing structure 33, stress dispersion layer 34. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 14 As shown in the figure, the pressurized wound dressing structure of the present invention includes a shell 31, an adhesive member 17 and a dressing assembly. The bottom of the shell 31 is open, and the adhesive member 17 is arranged on the edge of the opening at the bottom of the shell 31. An adhesive surface 19 for adhering to the skin surface around the wound 18 is arranged at the bottom of the adhesive member 17. The dressing assembly is arranged inside the shell 31, and the gap between the dressing assembly and the inner wall of the shell 31 is compressibly adjustable so that the portion of the dressing assembly located at the bottom opening of the shell 31 is squeezed outward.

[0039] The gap between the dressing assembly and the inner wall of the shell 31 is set to be compressible and adjustable so that the dressing assembly at the bottom opening of the shell 31 is squeezed outward. The purpose of this setting is to enable the dressing assembly to apply corresponding positive pressure from the bottom opening of the shell 31 to the wound 18 and the surrounding skin tissue through the squeezing effect generated by the contraction adjustment during use, so as to achieve active pressurization of the wound 18, and to achieve the functional effect of applying pressure to the local range of the wound 18, and then by applying a certain pressure to the side of the wound 18, it can play a certain compression effect on the wound 18, on the one hand, it can play a certain hemostatic effect to prevent the continuous seepage of exudate, and on the other hand, by pressing the dressing to the wound, it can improve the alignment effect of the wound.

[0040] Specifically, the function of achieving compressible and adjustable gap between the dressing assembly and the inner wall of the shell 31 in the present invention can be achieved in the following two ways: the first is to shrink the shell 31 to reduce the space inside the shell 31; the second is to expand the dressing assembly; of course, without loss of generality, the shrinking shell 31 and the expanding dressing assembly can be used simultaneously to achieve this.

[0041] More specifically, by shrinking the housing 31, at least the following three methods can be adopted in the present invention:

[0042] The first one, refer to the attached Fig. 9 As shown in , the shell 31 includes a left sealing film 6 and a right sealing film 7, and sealing strips 8 that can seal with each other are respectively arranged on the left sealing film 6 and the right sealing film 7. When the shell 31 needs to shrink and deform, the left sealing film 6 and the right sealing film 7 are buckled inwardly layer by layer with the corresponding sealing strips 8 to achieve it. More preferably, the sealing strips 8 are arranged in at least two rows along the depth direction of the shell 31. In this way, when multiple rows of sealing strips 8 are provided, starting from closing the outermost row, the body wall of the shell 31 between the adjacent inner rows is compressed to reduce the internal volume, and then the sealing strips of the adjacent inner row are closed in time, so that the shell 31 can be adjusted multiple times to gradually shrink and deform to reduce the internal volume of the shell 31.

[0043] The second type, refer to the attached Fig.10 As shown in the figure, the shell 31 includes a left baffle 9, a right baffle 10 and a downward pressing top cover 11. The downward pressing top cover 11 is arranged between the left baffle 9 and the right baffle 10 so as to be movable and adjustable up and down. The dressing assembly is located below the downward pressing top cover 11. When the shell 31 needs to shrink and deform, it can be realized by simply pressing down and adjusting the downward pressing top cover 11. More specifically, the downward pressing adjustment of the downward pressing top cover 11 can adopt a buckle adjustment structure, as shown in the attached figure. Fig.10As shown in the figure, a corresponding buckle 20 can be provided on the edge of the downward pressing top cover 11, and at the same time, a plurality of slots 21 cooperating with the buckle 20 are provided on the inner walls of the left baffle plate 9 and the right baffle plate 10 along the depth direction. By cooperating with the buckle 20 and the slots 21 at different levels, different downward pressing depths of the downward pressing top cover 11 can be achieved, thereby achieving the purpose of shrinking and deforming the shell 31 at different levels.

[0044] The third type, refer to the attached Fig.11 As shown in , the shell 31 is a flexible sealing film. When the fitting 17 is pasted on the skin surface around the wound 18, a sealed cavity 12 can be formed inside the shell 31. The sealed cavity 12 is connected to the outside through a vacuum tube 13 passing through the shell 31. When the shell 31 needs to shrink and deform, it is only necessary to evacuate the inside of the shell 31 through the vacuum tube 13 and then use the atmospheric pressure to achieve the purpose of shrinking the shell 31. Of course, without loss of generality, this method requires corresponding vacuum equipment, such as a vacuum pump, and the formed sealed cavity 12 also needs to have high sealing properties to ensure that vacuuming can be achieved. In addition, in order to facilitate vacuuming, a vacuum one-way valve 14 can be further provided in the vacuum tube 13.

[0045] In addition, by expanding the dressing component, the dressing component as a whole can be directly set as a composite dressing filler with an expandable volume, that is, the composite dressing filler includes a dressing body 32, and the composite dressing filler can also produce a corresponding expansion function. Specifically, at least the following four methods can be used in the present invention;

[0046] The first one, refer to the attached Figure 1 And attached Figure 2 As shown in , the composite dressing filler includes a dressing body 32 and a spring 23, and the spring 23 is disposed between the top of the shell 31 and the dressing body 32. That is, this method is to use the elastic force generated by the pre-compression of the spring 23 to achieve the expansion of the composite dressing filler itself after the pre-compression is released, and at the same time, downward pressure can be applied to the dressing body 32, so that the dressing body 32 generates pressure to press against the wound side. Without loss of generality, the spring 23 can also be disposed inside the dressing body 32 when necessary, as long as it can play the role of expanding the dressing body 32.

[0047] The second type, refer to the attached Figure 3 And attached Figure 6As shown, the composite dressing filler includes a dressing body 32 and an expansion bag 24, and the expansion bag 24 is arranged between the top of the shell 31 and the dressing body 32; the expansion bag 24 is connected to the outside through a pressurizing pipeline 25 passing through the shell 31. When expansion is required, it is only necessary to fill the expansion bag 24 with a corresponding pressurizing medium through the pressurizing pipeline 25 to expand the expansion bag 24, and then the expansion of the expansion bag 24 produces a downward pressure on the dressing body 32, so that the dressing body 32 produces pressure to press against the wound side. Without loss of generality, when not pressurized, the expansion bag 24 should be in a compressed state so that it can produce an expansion effect when pressurized. In addition, the pressurizing medium can be a gas medium or a liquid medium, such as air or water. In addition, the expansion bag 24 should have a certain expansion effect and a certain sealing property to ensure that the expansion state is maintained continuously and effectively after pressurization. In addition, when punching, a corresponding device capable of providing a pressurizing medium, such as an air pump or a water pump, is required. In addition, in order to facilitate charging, a charging check valve 22 may be further provided on the charging pipeline 25 .

[0048] The third type, refer to the attached Figure 4 As shown in , the composite dressing filler includes a dressing body 32 and an expansion bag 24, and the expansion bag 24 is arranged inside the dressing body 32; the expansion bag 24 is connected to the outside through a charging pipeline 25 passing through the shell 31. Similarly, a charging check valve 22 can also be arranged on the charging pipeline 25. This structural form is similar to the second structural form mentioned above, and only the installation position of the expansion bag 24 is adjusted.

[0049] Fourth, refer to the attached Figure 5As shown in , the composite dressing filler includes a dressing body 32, and the dressing body 32 is made of a liquid-absorbing self-expanding dressing. The dressing body 32 made of a liquid-absorbing self-expanding dressing refers to a type of dressing material that can expand itself after absorbing liquid, for example, it is made of expandable polymer materials, such as hemostatic powder or hemostatic fiber of purified plant starch, hydrophilic highly absorbent fiber fabric, or pre-compressed dehydrated fiber fabric and other materials. The use of a liquid-absorbing self-expanding dressing material also has the following advantages: on the one hand, the dressing body 32 can effectively absorb the exudate generated at the wound 18, and on the other hand, the expansion amount of the dressing body 32 can be automatically adjusted according to the amount of exudate exuded, thereby realizing feedback control of the pressure applied to the wound, so as to further enhance the compression effect, reduce the amount of exudate, and realize the effect of automatic feedback adjustment of applying pressure to the wound site; that is, the expansion amount of the dressing body 32 can be automatically adjusted according to the amount of exudate exuded from the wound 18, thereby adjusting the amount of pressure applied to the wound site, that is, the greater the amount of exudate at the wound 18, the greater the expansion amount of the dressing body 32, and the greater the pressure generated on the wound 18, and the greater the pressure, the greater the compression effect on the tissue at the wound 18, thereby achieving a stronger compression and hemostasis effect, thereby preventing further exudate from seeping out. In addition, in addition to the dressing body 32 being made of a liquid-absorbing self-expanding dressing, a composite dressing filler may also be provided that includes at least one layer of liquid-absorbing self-expanding material layer, and the liquid-absorbing self-expanding material layer is arranged on the dressing body 32 to form a composite layer structure; wherein the liquid-absorbing self-expanding material layer should be made of a material that can expand itself after absorbing liquid.

[0050] Without loss of generality, the structure of the housing 31 in the present invention can adopt different structural forms, and can adopt a rectangular parallelepiped structure according to actual conditions, such as the attached Figure 7 It can also be set to a semi-ellipsoidal structure, as shown in the attached Figure 6 In addition, the front and rear ends of the housing 31 should be sealed accordingly in the present invention so that the housing 31 only has a bottom opening structure, as shown in the attached Figure 7 As shown in FIG. 1 , a corresponding circle of adhesive members 17 may be provided on the entire edge of the bottom opening of the housing 31 .

[0051] In addition, when the dressing component is a composite dressing filler with an expandable volume, the shell 31 in the present invention can be set as a structure whose internal cavity cannot expand, so that the expansion effect of the composite dressing filler set inside it can only expand out through the opening at the bottom of the shell 31, thereby improving the ability of the composite dressing filler to effectively apply pressure to the wound side. More specifically, it is preferred to set the shell 31 as a whole to be made of non-elastic flexible material, such as a non-elastic flexible plastic film, flexible cloth or non-woven fabric, etc., as long as it is ensured that after the composite dressing filler expands, it can expand out from the bottom opening of the shell 31 to generate pressure on the wound side.

[0052] In addition, the use of the above-mentioned non-elastic flexible material to make the shell 31 also has the following advantages: first, it can further improve the adaptability of the pressurized wound dressing structure to wounds of different shapes, that is, the pressurized wound dressing structure can be placed to adapt by bending along the shape of the wound; second, other wound pulling and closing structures can be provided in conjunction with it, such as the wound dressing frame 15 provided in the present patent, so that with the help of the deformation of the shell 31, the two sides of the wound 18 can be pulled toward the middle, so that the skin edges on both sides of the wound 18 are pulled toward the middle and aligned, so as to ensure the healing effect of the wound after pulling.

[0053] In addition, the present invention further configures an opening edge at the bottom of the shell 31 to be connected to the middle of the adhesive member 17, and divides the adhesive member 17 into an outer extension portion 26 extending toward the outside of the shell 31 and an inner extension portion 27 extending toward the inside of the shell 31, and a clearance opening 28 corresponding to the wound 18 is provided between the inner extension portions 27 of the adhesive member 17 located on both sides of the shell 31, so that the dressing assembly arranged inside the shell 31 can cover the wound 18 and above the inner extension portions 27 on both sides; that is, a roughly butterfly-shaped connection structure is formed between the opening edge at the bottom of the shell 31 and the adhesive member 17, as shown in the accompanying drawings. The advantages of such a configuration are as follows: on the one hand, the effect of the expansion and traction of the adhesive member 17 by the shell 31 during the expansion of the expandable composite dressing filler on the adhesive member 17 is reduced, which can avoid the situation where the peeling force generated by the shell 31 on the adhesive member 17 starts to pull from the edge of the adhesive member 17, causing the adhesive member 17 to be easily peeled off from the skin surface at the edge; on the other hand, by forming the corresponding inner extension 27, and further clamping the inner extension 27 during the process of the expandable composite dressing filler expanding and pressing the wound 18, the adhesive effect of the adhesive member 17 can be further improved, and the problem of the adhesive member 17 falling off during the pressure application process can be prevented. Without loss of generality, the inner extension 27 should be set as far as possible not to cover the wound 18, so a corresponding clearance opening 28 needs to be reserved for the contact between the wound 18 and the dressing assembly.

[0054] In addition, in the present invention, a stress dispersion layer 34 is further provided between the adhesive member 17 and the opening edge at the bottom of the shell 31. The stress dispersion layer 34 is provided on the upper surface of the adhesive member 17. The rigidity of the stress dispersion layer 34 is greater than the rigidity of the adhesive member 17. The opening edge at the bottom of the shell 31 is connected to the non-edge portion of the stress dispersion layer 34. After the stress dispersion layer 34 is provided, the force F exerted by the shell 31 on the adhesive member 17 can be evenly dispersed through the stress dispersion layer 34, thereby avoiding the occurrence of stress concentration, and avoiding the occurrence of the adhesive member 17 having only one film layer. Fig.14 The stress concentration shown forms a corresponding stress concentration area 16, which causes the problem of skin strain. Without loss of generality, the stiffness requirement of the stress dispersion layer 34 should at least be that the deformation of the stress dispersion layer 34 should not be greater than the deformation of the skin when subjected to the same force F, so as to ensure that the stress dispersion layer 34 can effectively resist the force F and avoid stress concentration.

[0055] More specifically, the adhesive surface 19 is used to connect the housing 31 to the skin by adhesive bonding. Specifically, the adhesive surface 19 can be formed by coating a layer of adhesive on the lower side of the adhesive member 17 when in use; or it can be pre-coated on the adhesive member 17 and protected by covering a protective layer, and can be pasted after the protective layer is removed when in use.

[0056] In addition, in order to ensure uniform pressure on the wound surface and shape the flatness of the wound apposition surface, a shaping plate 29 is further provided at the bottom of the dressing assembly in the present invention, and the bottom surface of the shaping plate 29 is a flat wound apposition reference plane 30. Among them, the bottom surface of the shaping plate 29 should be flat and not easy to deform, so as to ensure that the uniform pressure generated by the shaping plate 29 further shapes the irregular surface of the wound 18 initially apposition into a flat apposition surface by means of the wound apposition reference plane 30, so as to promote the flatness and beauty of the surface after the wound heals.

[0057] In addition, refer to the attached Fig.15 and 16As shown in, the present invention further provides a pressurized wound closure device, comprising the pressurized wound dressing structure 33 described in the present invention, and also comprising a wound dressing frame 15, wherein the wound dressing frame 15 comprises a pull-and-close member 1, a fixing member 2 and a dressing fence 3, and a dressing placement area 4 is formed inside the dressing fence 3, wherein the fixing member 2 is arranged along both sides of the dressing fence 3, and at least one pull-and-close member 1 is arranged corresponding to each fixing member 2, wherein one end of each pull-and-close member 1 is connected to the corresponding fixing member 2, and the other end of the pull-and-close member 1 is connected to a side of the dressing fence 3 close to the corresponding fixing member 2, and the distance between the fixing member 2 and the dressing fence 3 can be adjusted by the pull-and-close member 1, and the bottom surface of the fixing member 2 is arranged as a fixed adhesive surface 5 for adhering to the skin; the pressurized wound dressing structure 33 is arranged in the dressing placement area 4.

[0058] When in use, the fixing member 2 is fixedly attached to the skin outside the wound 18 through the fixing adhesive surface 5, and then the dressing fence 3 is surrounded outside the wound 18. The dressing fence 3 is connected to the fixing member 2 by means of the pull-and-close member 1 so as to be located above the wound 18 relative to the fixing dressing fence 3. The pressure-type wound dressing structure 33 is placed in the dressing placement area 4 formed inside the dressing fence 3, thereby achieving the limiting and shaping effects on the pressure-type wound dressing structure 33. Without loss of generality, the fixing adhesive surface 5 can be formed by coating a layer of adhesive on the lower side of the fixing member 2 when in use; it can also be pre-coated on the fixing member 2 and protected by covering a layer of protective layer, and can be pasted after the protective layer is uncovered when in use.

[0059] Without loss of generality, since the dressing fence 3 needs to bear the pulling force of the pulling piece 1, the dressing fence 3 should adopt a structurally stable frame structure. For example, a stainless steel prefabricated part with a certain thickness can be used as the dressing fence 3 to ensure that the dressing fence 3 will not be deformed and fail under the pulling force of the pulling pieces 1 on both sides.

[0060] In addition, the function of the pull-close member 1 can be achieved by applying a corresponding pulling force between the dressing fence 3 and the fixing member 2, and then applying the force to the skin on both sides of the wound through the fixing member 2, so as to achieve a pulling effect on the wound and make the wound close to the middle. Specifically, the pull-close member 1 can be a ratchet structure or a lace structure. The so-called ratchet structure is specifically provided with a corresponding ratchet rack on the pull-close member 1, and a ratchet seat locked with the ratchet rack is provided on the fixing member 2, and the pull-close member 1 is adjusted by the ratchet rack and the ratchet seat. The so-called lace structure is specifically provided that the pull-close member 1 is a flexible lace, one end of which can be fixed on the dressing fence 3, and the other end is wrapped around the lace buckle provided on the fixing member 2, folded back and fastened to itself, for example, it can be attached through the structure of Velcro after folding back, and the pull-close member 1 is adjusted by pulling the lace.

Claims

1. A pressurized wound closure device, comprising a pressurized wound dressing structure (33) and a wound dressing frame (15), wherein the wound dressing frame (15) comprises a pull-and-close member (1), a fixing member (2) and a dressing fence (3), wherein a dressing placement area (4) is formed inside the dressing fence (3), wherein the fixing member (2) is arranged along both sides of the dressing fence (3), wherein at least one pull-and-close member (1) is arranged corresponding to each fixing member (2), wherein one end of each pull-and-close member (1) is connected to the corresponding fixing member (2), and the other end of the pull-and-close member (1) is close to the dressing fence (3). The pressure-type wound dressing structure (33) is connected to one side of a corresponding fixing member (2), and the distance between the fixing member (2) and the dressing fence (3) can be adjusted by a pull-and-close member (1), and the bottom surface of the fixing member (2) is arranged as a fixing and pasting surface (5) for pasting on the skin; the pressure-type wound dressing structure (33) is arranged in the dressing placement area (4); the pressure-type wound dressing structure (33) comprises a dressing assembly, and a shaping plate (29) is arranged at the bottom of the dressing assembly, and the bottom surface of the shaping plate (29) is a wound aligning reference plane (30) with a flat surface; it is characterized in that: The pressurized wound dressing structure (33) further comprises a shell (31) and an adhesive member (17); the bottom of the shell (31) is open; the adhesive member (17) is arranged on the edge of the opening at the bottom of the shell (31); an adhesive surface (19) for being adhered to the skin surface around the wound (18) is arranged at the bottom of the adhesive member (17); the dressing assembly is arranged inside the shell (31); and the gap between the dressing assembly and the inner wall of the shell (31) is compressibly adjustable so that the portion of the dressing assembly located at the bottom opening of the shell (31) is squeezed outward; the edge of the opening at the bottom of the shell (31) is connected to the middle portion of the adhesive member (17) and divides the adhesive member (17) into an extension portion (19) extending toward the outside of the shell (31) and an extension portion (20) extending toward the outside of the shell (31). The shell (31) has an inner extension (26) and an inner extension (27) extending toward the inside of the shell (31), and a clearance opening (28) corresponding to the wound (18) is provided between the inner extension (27) of the adhesive piece (17) located on both sides of the shell (31), and the dressing assembly arranged inside the shell (31) can cover the wound (18) and the inner extension (27) on both sides; a stress dispersion layer (34) is also provided between the adhesive piece (17) and the opening edge at the bottom of the shell (31), and the stress dispersion layer (34) is arranged on the upper surface of the adhesive piece (17), the stiffness of the stress dispersion layer (34) is greater than the stiffness of the adhesive piece (17), and the opening edge at the bottom of the shell (31) is connected to the non-edge portion of the stress dispersion layer (34).

2. The pressurized wound closure device according to claim 1, characterized in that: The shell (31) is a structure with an internal cavity volume that can shrink and deform.

3. The pressurized wound closure device according to claim 2, characterized in that: The housing (31) comprises a left sealing film (6) and a right sealing film (7), and sealing strips (8) capable of sealingly cooperating with each other are respectively arranged on the left sealing film (6) and the right sealing film (7).

4. The pressurized wound closure device according to claim 2, characterized in that: The shell (31) comprises a left baffle plate (9), a right baffle plate (10) and a downward pressing top cover (11); the downward pressing top cover (11) is arranged between the left baffle plate (9) and the right baffle plate (10) so as to be movable up and down, and the dressing assembly is located below the downward pressing top cover (11).

5. The pressurized wound closure device according to claim 2, wherein: The shell (31) is a flexible sealing film. When the adhesive member (17) is adhered to the skin surface around the wound (18), a sealed cavity (12) can be formed inside the shell (31). The sealed cavity (12) is connected to the outside through a vacuum tube (13) passing through the shell (31); an air extraction one-way valve (14) is provided in the vacuum tube (13).

6. The pressurized wound closure device according to claim 1, wherein: The dressing component is a composite dressing filler with expandable volume.

7. The pressurized wound closure device according to claim 6, characterized in that: The composite dressing filler comprises a dressing body (32) and a spring (23), wherein the spring (23) is arranged between the top of the shell (31) and the dressing body (32) or inside the dressing body (32).

8. The pressurized wound closure device according to claim 6, wherein: The composite dressing filler comprises a dressing body (32) and an expansion bladder (24); the expansion bladder (24) is arranged between the top of the shell (31) and the dressing body (32), or the expansion bladder (24) is arranged inside the dressing body (32); the expansion bladder (24) is connected to the outside world via a charging pipeline (25) passing through the shell (31); and a charging check valve (22) is arranged on the charging pipeline (25).

9. The pressurized wound closure device according to claim 6, characterized in that: The composite dressing filler comprises a dressing body (32), and the dressing body (32) is made of a liquid-absorbing self-expanding dressing.

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