Wound closing device

Abstract

The utility model discloses a wound closing device, and belongs to the field of medical supplies. A skin pasting unit of the wound pulling and closing device comprises a skin surface flexible elastic pasting layer and a base band used for being fixedly connected with the wound pulling and closing unit, the base band is fixedly arranged on the side, close to a wound, of the upper surface of the skin surface flexible elastic pasting layer, and the outer edge of the base band does not exceed the outer edge area of the skin surface flexible elastic pasting layer; the base band on each skin pasting unit at least comprises a base band upper layer and a base band lower layer, the base band upper layer is composed of a plurality of base band upper layer substrates which are arranged at intervals in the long axis direction of the base band lower layer, and every two adjacent base band upper layer substrates are spaced or make contact with each other or are connected through an easy-to-tear structure. The fixed ends of the wound pulling and closing units located on the same skin pasting unit are connected to different upper-layer substrates of the base band, the lower layer of the base band is designed to be of an elastic sheet body structure with strip-shaped reinforcing ribs, and the wound pulling and closing device can be suitable for pulling and closing wounds on the joint part and the area near the joint.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical supplies, especially to a wound puller. BACKGROUND

[0002] The wound puller is a device for pulling the wound to promote wound healing. The common wound puller adopts a like-and-like wound pulling unit to pull the adhesive units pasted on both sides of the wound, thereby pulling the wound to the middle.

[0003] The conventional wound pulling unit generally adopts a ratchet or a like-and-like belt locking structure. The locking structure has the following disadvantages: the components of the wound pulling and locking device need a certain hardness, cannot be flattened, and the soft material is easy to scratch the skin or be hooked to cause shedding. There is a foreign body sensation at the joint and other skin folding parts. For specific structure, refer to the patent document with the publication number CN212756146U. The embodiment shown in its attached Figure 1 and Figure 2 The embodiment shown in its attached Figure 6 adopts a ratchet locking structure, and the embodiment shown in its attached adopts a like-and-like belt locking structure.

[0004] Secondly, the fixing point of the conventional wound pulling and locking device is usually located above one side of the adhesive unit or both sides of the adhesive unit. The pulling and locking force is transmitted from the pulling unit and the ratchet connecting part to the adhesive unit, and the force transmission is uneven. Among them, the one-sided pulling of the ratchet is easy to cause uneven force, and the belt with one-sided pulling instead of the ratchet has the same problem. The like-and-like belt locking structure is arranged in a staggered manner, which causes the skin to twist when pulling. Some ratchets on the market are arranged in a staggered manner to realize bidirectional like-and-like pulling and locking, which also has the same problem.

[0005] In addition, the existing wound pulling and closing unit also adopts a pull strip locking structure with a reverse folding and pasting fixing mode. For the specific structure, please refer to the patent document with the publication number CN213665484U. The wound pulling and closing unit of the scheme is composed of a starting section, a free section and a fixed section arranged in sequence. The starting section of the wound pulling and closing unit is fixedly connected with one side of the pasting unit. A limiting baffle for guiding and limiting the two sides of the free section is arranged on the pasting unit on the other side. The free section can freely pass through the limiting passage between the two limiting baffles, and the width of the corresponding matching part of the free section on the two sides of the limiting baffle is adapted to the width of the limiting passage between the two limiting baffles. A pasting layer is arranged on the fixed section. A cross beam shaft is arranged between the two limiting baffles. The free section is folded back after passing through the cross beam shaft, and the pasting unit position corresponding to the fixed connection between the starting section and the fixed section is selectively connected. In the actual manufacturing process of the product, the cross beam shaft and the limiting baffles and the limiting passage for fixing the cross beam shaft usually need a certain hardness and thickness to ensure that the pull strip is not pulled off when the pull strip is folded back and pulled together. In clinical use, the over-thick and over-hard sheet material is easy to cause cutting injury at the edge tension convergence on the skin with good elasticity, and the over-thick sheet material cannot stretch with the skin, and the bottom glue surface is easy to fall off. The scheme reduces the overall thickness of the pasting unit on one side to the minimum, but the thickness and hardness of the other side cannot reach the ideal state. Moreover, when the wound pulling and closing unit is implemented, the fixing point is also located above one side of the pasting unit, the mechanical distribution is uneven, and the tension convergence on one side is easy to occur.

[0006] The common shortcomings of the schemes in the patent documents with the publication numbers CN212756146U and CN213665484U are that in order to transmit the pulling force of the pulling and closing locking unit, a strip-shaped base band needs to be arranged on the skin pasting unit. The strip-shaped base band generally adopts a rigid linear skeleton material, such as a transparent plastic plate, a rubber plate, etc. At the same time, the strip-shaped base band should have a specific thickness to ensure that the strip-shaped base band can play a role in dispersing the pulling force. However, the scheme is only suitable for wounds in parts of the skin that basically do not deform, and is not suitable for wounds in joint parts and areas near the joints. Practical new type content

[0007] The technical problem solved by the utility model is to provide a wound pulling and closing device applicable to wounds in joint parts and areas near the joints.

[0008] The utility model discloses a technical scheme that solves its technical problem is: the wound puller, including the wound puller unit and skin pasting unit, skin pasting unit is used for pasting fixed on the skin surface of two sides of the wound, the wound puller unit connects the skin pasting unit of both sides, and the skin pasting unit includes the skin surface flexible elastic pasting layer for directly pasting on the skin surface and the base tape for fixedly connecting the wound puller unit, and the base tape is fixedly arranged on the skin surface flexible elastic pasting layer upper surface near the wound side, and the outer edge of the base tape does not exceed the outer edge area of the skin surface flexible elastic pasting layer, and the base tape on each skin pasting unit includes the base tape upper layer and the base tape lower layer, and the base tape upper layer is fixedly arranged on the upper surface of the base tape lower layer, and the outer edge of the base tape upper layer does not exceed the outer edge of the base tape lower layer, and the fixed end of the wound puller unit is connected to the base tape upper layer, and the fixed end of the wound puller unit and the skin surface flexible elastic pasting layer part are not directly connected, and the base tape lower layer includes the elastic sheet body that can be stretched and deformed in the plane direction, and a plurality of strip reinforcing ribs are arranged in the elastic sheet body, and the strip reinforcing rib is arranged along the direction parallel to the long axis of the wound, and the axis of a single strip reinforcing rib is perpendicular to the long axis of the wound, and the material of the strip reinforcing rib and the base tape upper layer base sheet is inextensible material.

[0009] Further, the skin pasting unit further includes an upper flexible elastic pasting layer for covering the skin surface flexible elastic pasting layer, the base tape surface and the fixed end of the wound puller unit, at least the base tape lower layer is fixedly arranged between the skin surface flexible elastic pasting layer and the upper flexible elastic pasting layer on one side, the base tape upper layer is arranged between the skin surface flexible elastic pasting layer and the upper flexible elastic pasting layer on one side or in the reserved hole on the upper flexible elastic pasting layer, and the fixed end of the wound puller unit is arranged between the skin surface flexible elastic pasting layer and the upper flexible elastic pasting layer on one side or in the reserved hole on the upper flexible elastic pasting layer, the skin surface flexible elastic pasting layer and the upper flexible elastic pasting layer have an elastic deformation capacity greater than that of the elastic sheet body of the base tape lower layer, and the upper surface of the upper flexible elastic pasting layer is provided with a shaping protective paper.

[0010] Further, the wound puller unit is at least two groups arranged along the long axis direction of the wound, the base tape upper layer is composed of a plurality of base tape upper layer base sheets arranged along the long axis direction of the base tape lower layer, there is a spacing between the adjacent two base tape upper layer base sheets or they are in contact or connected through a tearable structure, and the fixed end of the wound puller unit on the same skin pasting unit is connected to different base tape upper layer base sheets.

[0011] Further, the wound puller unit includes a pull strip, the fixed end of the pull strip is a pull strip fixed sheet, and the base tape upper layer base sheet and the pull strip fixed sheet connected thereto are integrated into an integral structure.

[0012] Further, the fixed end of the wound pulling unit is a stay fixed base, the stay fixed base is fixed on the upper surface of the upper base sheet of the base strip, and the outer edge of the stay fixed base does not exceed the outer edge of the upper base sheet of the base strip. The stay fixed base is preferably provided in a sheet shape.

[0013] Further, the skin pasting unit further comprises a flexible and elastic pasting layer covering the skin surface, an upper flexible and elastic pasting layer covering the fixed end of the wound pulling unit and the surface of the base strip. The base strip is fixed between the flexible and elastic pasting layer on one side and the upper flexible and elastic pasting layer. The fixed end of the wound pulling unit is arranged between the flexible and elastic pasting layer on one side and the upper flexible and elastic pasting layer or in a reserved hole in the upper flexible and elastic pasting layer. The flexible and elastic pasting layer on one side and the upper flexible and elastic pasting layer have a greater elastic deformation capacity than the base sheet of the lower base. The upper surface of the upper flexible and elastic pasting layer is provided with a shaped protective paper.

[0014] Further, the wound pulling unit comprises a first stay and a second stay arranged oppositely with the central axes located in the same vertical plane. The first stay is fixedly connected with the skin pasting unit on one side, and the second stay is fixedly connected with the skin pasting unit on the other side. The free end of the first stay has a guide hole for the second stay to pass through. The adjacent contact surfaces of the first stay and the second stay are provided with a fixing device. The first stay and the second stay have a first state of relatively freely moving along the axis direction of the guide hole under the constraint of the guide hole, and a second state of fixing the relative positions of the first stay and the second stay after being fixed by the fixing device at the upper and lower overlapping parts. Further, the fixing device is an adhesive, a double-sided adhesive pasting layer or a fixing device with a surface occlusion relationship. A temporary anti-adhesion layer is temporarily covered on the outer surface of the fixing device.

[0015] Further, the free end of the first stay has a widened first handle part, the guide hole penetrating through the upper and lower surfaces of the first handle part is arranged in the width direction of the first handle part, and the adjacent first handle parts are connected and fused with each other in the width direction. The free end of the second stay has a widened second handle part, and the adjacent second handle parts are connected and fused with each other in the width direction. The fixed end of each first stay has a first stay fixing sheet, and the first stay fixing sheet is connected with the corresponding upper base sheet of the base strip and is entirely embedded between the flexible and elastic pasting layer on one side and the upper flexible and elastic pasting layer. The fixed end of each second stay has a second stay fixing sheet, and the second stay fixing sheet is connected with the corresponding upper base sheet of the base strip and is entirely embedded between the flexible and elastic pasting layer on the other side and the upper flexible and elastic pasting layer.

[0016] In another preferred embodiment of the pull strip, the free end of the first pull strip has a widened first handle portion, and adjacent first handle portions are connected and fused together in the width direction; the free end of the second pull strip has a widened second handle portion, and adjacent second handle portions are connected and fused together in the width direction; each first pull strip has a first pull strip fixing piece at its fixed end, the first pull strip fixing piece is connected to the corresponding upper substrate of the base strip, and is integrally embedded between the flexible elastic adhesive layer on the skin surface and the upper flexible elastic adhesive layer on one side; each second pull strip has a second pull strip fixing piece at its fixed end, the second pull strip fixing piece is connected to the corresponding upper substrate of the base strip, and is integrally embedded between the flexible elastic adhesive layer on the skin surface and the upper flexible elastic adhesive layer on the other side; the guide hole is a guide tunnel provided in the middle of the first pull strip, the upper layer at one axial end of the guide tunnel is fixedly connected to the section of the first pull strip body with the first handle portion, and the lower layer at the other axial end of the guide tunnel is fixedly connected to the section of the first pull strip body with the first pull strip fixing piece.

[0017] Furthermore, the system includes a support frame assembly and a wound dressing assembly. The support frame assembly is located between the two skin-adhesive units, and the wound dressing assembly is installed at the bottom of the support frame assembly. The support frame assembly consists of an upper wing plate, a lower wing plate, and a vertical web plate, with an "I"-shaped cross-section. The web plate has spaced holes for the first and second pull rods to pass through. The lower wing plate serves as a guide rail to connect to the guide groove at the top of the dressing assembly. The guide groove of the dressing assembly can slide freely along the long axis of the guide rail or slide out of both ends of the guide rail to release the sliding connection with the guide rail. The guide groove surrounds the guide rail, and the groove edge fits into the web plate. The groove edges at both ends of the guide groove are set as inwardly extending "V" shapes, guiding the groove edge from the widest part of the "V" shape to transition to a constrained fit with the web plate. The ends of the guide rail have V-shaped guide heads that are adapted to the groove opening.

[0018] Furthermore, a first pull bar and a second pull bar corresponding to each other constitute a set of pull bars. Each set of pull bars passes through the same pull bar hole, and each set of pull bars is axially constrained by the pull bar hole and guide hole at two different positions on the same axis in the long axis direction.

[0019] Furthermore, the wound dressing assembly consists of a hemostatic or antibacterial dressing and a porous membrane covering the dressing; the edges of the porous membrane are sealed by heat fusion or ultrasonic welding.

[0020] The base band lower layer adopts a unique elastic sheet body structure design with a strip-shaped reinforcing rib, the strip-shaped reinforcing rib enhances the ability of the base band to resist tensile deformation generated when the wound pulling-together unit is locked, so that the base band basically has no elastic deformation in the width direction of the outer plane of the wound (that is, perpendicular to the long axis direction of the wound), the main body of the base band lower layer is an elastic sheet body, and the interval area between the strip-shaped reinforcing ribs maintains its own elastic deformation ability, that is, the base band lower layer maintains elastic deformation ability in the length direction of the base band (that is, parallel to the long axis direction of the wound) and the thickness direction, and the base band lower layer can change as a whole to adapt to the change of the skin, so that it can be applied to uneven skin areas, and when a plurality of wound pulling-together units are arranged, the spacing between adjacent base band upper layer substrates (the spacing corresponds to the long axis direction of the wound) can also be adjusted.

[0021] In the preferred embodiment, the base band and the fixed end of the wound pulling-together unit are covered between the skin surface flexible elastic adhesive layer and the upper flexible elastic adhesive layer; according to the literal meaning of "flexible elastic adhesive layer", the material layer has a certain flexibility and elastic deformation ability, and when the wound is applied to the joint part and the joint near area, the skin surface flexible elastic adhesive layer and the upper flexible elastic adhesive layer can change to adapt to the change of the skin of the human body, and the spacing between adjacent base band upper layer substrates can be adjusted by the elastic deformation ability of the skin surface flexible elastic adhesive layer, the upper flexible elastic adhesive layer and the base band lower layer to adapt to the change of the skin, so as to ensure the reliability of the whole wound pulling-together unit. The upper surface of the upper flexible elastic adhesive layer is provided with a plastic protective paper, and the upper and lower flexible elastic adhesive layers on the same side can adopt an elastic material that simulates the elastic variable of the skin, and can extend to adapt to the movement of the skin, but the material is too soft and the shape cannot be fixed, and it is easy to stick together after the release paper is removed. Therefore, the top layer is provided with a plastic protective paper, the pulling-together unit is fixed in the flexible material, and the fixed shape of the whole pulling-together unit is ensured.

[0022] Furthermore, the wound closure device of this invention employs a first and a second pull strip with their central axes located on the same vertical plane and arranged opposite each other (i.e., the two pull strips are arranged symmetrically or approximately symmetrically). A guide hole adapted to the second pull strip is provided on the first pull strip. During implementation, the first and second pull strips can form an overlapping portion rather than being staggered. After closure, the two layers of pull strips can be glued and fixed in the middle. During bidirectional closure, the force direction is basically on the same horizontal line, and the fixed position is the overlapping portion in the middle of the pull strips. This allows the suturing force to be transmitted symmetrically along the middle, thereby evenly distributing the force to the skin adhesive units on both sides, effectively improving the wound closure effect. In addition, with the above structural design of this invention, both the first and second pull strips can be flattened, requiring lower material hardness; they can be made of flexible, non-elastic materials, making them less likely to damage the skin during implementation and providing a better feel for the patient. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a specific embodiment of the wound closure device described in this utility model.

[0024] Figure 2 This is a top view schematic diagram of a specific embodiment of the wound closure device described in this utility model.

[0025] Figure 3 This is a schematic diagram of the fixing structure of the first pull bar (the upper flexible elastic adhesive layer is not shown).

[0026] Figure 4 This is a schematic diagram of the fixing structure of the second tie rod (the upper flexible elastic adhesive layer is not shown).

[0027] Figure 5 This is a schematic diagram of the planar structure of the baseband lower layer of the present invention.

[0028] Figure 6 This is a three-dimensional schematic diagram of a specific embodiment of the support frame assembly and dressing assembly described in this utility model.

[0029] Figure 7 for Figure 6 The front view.

[0030] Figure 8 for Figure 7 AA section view in the image.

[0031] Figure 9 This is a three-dimensional schematic diagram of another specific embodiment of the wound closure device described in this utility model.

[0032] The components in the diagram are labeled as follows: support frame assembly 100, pull bar hole 101, web plate 102, guide rail 103, V-shaped guide head 104, wound dressing assembly 200, guide groove 201, V-shaped guide opening 202, wound closing unit 300, first pull bar 301, guide hole 3011, first handle part 3012, guide tunnel 3013, second pull bar 302, second handle part 3021, fixing device 303, release protective paper 304, skin adhesive unit 400, skin surface flexible elastic adhesive layer 401, base band 402, upper flexible elastic adhesive layer 403, upper base band 4021, lower base band 4022, and strip reinforcing rib 4023. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] It should be noted that if the present invention involves directional indicators, such as up, down, left, right, front, and back, these terms are used to describe the relative positional relationship between components and are not specific to the absolute position of related components or the positional relationship between components. They are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0035] like Figures 1 to 9As shown, the utility model of the skin surface flexible elastic adhesive layer 401 and the base band 402 for fixedly connecting the wound pulling unit 300, the base band 402 is fixedly arranged on the skin surface flexible elastic adhesive layer 401 upper surface near the wound side, and the outer edge of the base band 402 does not exceed the outer edge area of the skin surface flexible elastic adhesive layer 401. The base band 402 on each skin pasting unit 400 comprises a base band upper layer 4021 and a base band lower layer 4022, the base band upper layer 4021 is fixedly arranged on the upper surface of the base band lower layer 4022, and the outer edge of the base band upper layer 4021 does not exceed the outer edge of the base band lower layer 4022, the fixed end of the wound pulling unit 300 is connected to the base band upper layer 4021, and the fixed end of the wound pulling unit 300 is not directly connected to the skin surface flexible elastic adhesive layer 401. The base band lower layer 4022 comprises an elastic sheet body that can be stretched and deformed in the plane direction, the elastic deformation capacity of the elastic sheet body is preferably designed to be less than the skin surface flexible elastic adhesive layer 401, a plurality of strip-shaped reinforcing ribs 4023 are arranged in the base band lower layer 4022, the strip-shaped reinforcing ribs 4023 are arranged along the direction parallel to the long axis of the wound, the axis of a single strip-shaped reinforcing rib 4023 is perpendicular to the long axis of the wound, and the material of the strip-shaped reinforcing rib 4023 and the base band upper layer substrate is a non-stretchable material.

[0036] It can be understood that the "wound long axis" only represents a hypothetical virtual axis, indicating the limitation of the distribution mode of the wound pulling unit 300 and the base band 402, and in specific application, the skin pasting unit 400 is fixedly pasted on the skin surface on both sides of the wound, the wound pulling unit 300 can be arranged in multiple groups along the direction of the long axis of the wound (only one group can be designed), and the pulling force of the wound pulling unit 300 is perpendicular to the long axis of the wound. The base band 402 is used to connect the fixed end of the wound pulling unit 300, and the base band 402 is fixedly arranged on the skin surface flexible elastic adhesive layer 401 upper surface near the wound side, so the length direction of the base band 402 corresponds to the long axis direction of the wound, and the long axis direction of the base band lower layer 4022 is parallel to the long axis direction of the wound.

[0037] In some preferred schemes, the wound pulling unit 300 is at least two groups arranged along the direction of the long axis of the wound, the base band upper layer 4021 is composed of a plurality of base band upper layer substrates arranged along the long axis direction of the base band lower layer 4022, there is a spacing space between the adjacent two base band upper layer substrates or they are in contact or connected through a tearable structure, and the fixed end of the wound pulling unit 300 on the same skin pasting unit 400 is connected to different base band upper layer substrates.

[0038] In the product's normal state before use, the two upper base strips are two independent individuals; in the product's normal state before use, the two upper base strips are two independent individuals but in contact with each other; in the product's normal state before use, the two upper base strips are connected as a whole by the easy-to-tear structure, and in the use state, if the skin surface flexible and elastic adhesive layer 401 and the lower base strip 4022 conform to the skin changes and produce tensile deformation on the plane, the tensile force generated by the human joint activity can make the easy-to-tear structure break, thereby becoming two independent upper base strips. The "easy-to-tear structure" is a conventional term in the art, which can be a tear tooth or a tear line structure.

[0039] The material of the strip-shaped reinforcing rib 4023 is a non-stretchable material, that is, the strip-shaped reinforcing rib 4023 does not have the ability to elastically stretch and deform in the plane of its long axis, and when the tensile force exceeds its corresponding maximum bearing capacity, it can only produce a destructive tensile deformation that cannot be restored. Similarly, the material of the upper base strip is a non-stretchable material, that is, the upper base strip does not have the ability to elastically stretch and deform in the parallel direction of its large surface (the plane parallel to the upper surface or the lower surface), and when the tensile force exceeds its corresponding maximum bearing capacity, it can only produce a destructive tensile deformation that cannot be restored. In the use state of the tensioner, the tensile force generated when the wound tension unit 300 is locked cannot make the upper base strip produce tensile deformation. The present application does not include improvements in materials, and the specific materials of the skin surface flexible and elastic adhesive layer 401, the strip-shaped reinforcing rib 4023, the elastic sheet body of the lower base strip 4022, and the upper base strip can be reasonably selected by those skilled in the art according to their ordinary technical knowledge from existing materials. The upper base strip can generally use the same material as the tension strip in the wound tension unit 300. Regardless of the form of the wound tension unit 300, it generally includes multiple groups of tension strips, and the fixed end of the tension strip is the tension strip fixing piece. In some embodiments, the upper base strip and the tension strip fixing piece connected thereto can be integrated into a structure, that is, the tension strip fixing piece at the fixed end of each group of wound tension units 300 also serves as the upper base strip 4021. This structure is relatively simple and easy to implement.

[0040] The strip-shaped reinforcing rib 4023 is arranged on the inner, top surface or bottom surface of the base band lower layer 4022. The base band lower layer 4022 is designed with a unique structure of the elastic sheet body with strip-shaped reinforcing ribs 4023. The strip-shaped reinforcing rib 4023 enhances the ability of the base band 402 to resist tensile deformation caused by the locking of the wound stretching unit 300, so that the base band 402 has substantially no elastic deformation in the width direction of the outer plane of the wound (i.e., perpendicular to the long axis direction of the wound). The main body of the base band lower layer 4022 is an elastic sheet body, and the interval area between the strip-shaped reinforcing ribs 4023 maintains its own elastic deformation ability. That is, the base band lower layer 4022 maintains the elastic deformation ability in the length direction of the base band 402 (i.e., parallel to the long axis direction of the wound) and the thickness direction. The base band lower layer 4022 can change as a whole to adapt to the changes of the skin, so as to be applicable to uneven skin areas. When multiple groups of wound stretching units are arranged, the spacing between adjacent base band upper layer substrates (which corresponds to the long axis direction of the wound) can also be adjusted. In the preferred embodiment, the elastic deformation ability of the base band lower layer 4022 is less than that of the skin surface flexible and elastic adhesive layer 401, but greater than that of the base band upper layer substrate. The outer edge of the base band upper layer substrate does not exceed the base band lower layer 4022, and the outer edge of the base band lower layer 4022 does not exceed the skin surface flexible and elastic adhesive layer 401 (since the base band 402 as a whole does not exceed the skin surface flexible and elastic adhesive layer 401, the outer edge of the base band lower layer 4022 connected to the skin surface flexible and elastic adhesive layer 401 will not exceed the outer edge of the skin surface flexible and elastic adhesive layer 401). The base band structure can achieve a stepped stress dispersion effect in the vertical direction, and the strong suture tension is "stepped down" and uniformly dispersed to a larger range of skin surface through the transition of the base band 402. Therefore, the tension of the skin can be more evenly dispersed, and skin damage such as skin stretch injury and tension skin blister can be avoided. The enhancement and limitation of the strip-shaped reinforcing rib 4023 can fully ensure the reliability of the whole structure of the stretching device.

[0041] In some other embodiments, the fixed end of the wound pulling-together unit 300 can also be independently arranged relative to the upper layer substrate of the base strip. Specifically, the fixed end of the wound pulling-together unit 300 is a fixed base of the pull strip, which is fixedly arranged on the upper surface of the upper layer substrate of the base strip, and the outer edge of the fixed base of the pull strip does not exceed the outer edge of the upper layer substrate of the base strip. In this structure, the upper layer substrate of the base strip serves as an intermediate force transmission component between the fixed base of the pull strip and the lower layer 4022 of the base strip, and can more fully play a role in dispersing stress. The fixed base of the pull strip here refers to the fixed base of various different forms of pull strips (such as the conventional one-way ratchet strip, one-way adhesive pull strip, etc.), and can also be applied to the bidirectional pull type pull strip described below (at this time, the fixed base of the pull strip is the first pull strip fixed plate and the second pull strip fixed plate). In order to better achieve the stress dispersion effect, the fixed base of the pull strip is preferably arranged in a sheet shape, and after the sheet-shaped fixed base of the pull strip is used, it is also beneficial to arrange the upper layer flexible and elastic adhesive layer 403 to wrap the fixed end of the wound pulling-together unit 300 as a whole.

[0042] In the preferred embodiments, the skin adhesive unit 400 further comprises a flexible and elastic adhesive layer 401 covering the skin surface, an upper layer flexible and elastic adhesive layer 403 covering the surface of the base strip 402 and the fixed end of the wound pulling-together unit 300; at least the lower layer 4022 of the base strip is fixedly arranged between the skin surface flexible and elastic adhesive layer 401 on one side and the upper layer flexible and elastic adhesive layer 403, the upper layer 4021 of the base strip is arranged between the skin surface flexible and elastic adhesive layer 401 on one side and the upper layer flexible and elastic adhesive layer 403 or in the reserved hole on the upper layer flexible and elastic adhesive layer 403 (preferably arranged between the skin surface flexible and elastic adhesive layer 401 on one side and the upper layer flexible and elastic adhesive layer 403), the fixed end of the wound pulling-together unit 300 is arranged between the skin surface flexible and elastic adhesive layer 401 on one side and the upper layer flexible and elastic adhesive layer 403 or in the reserved hole on the upper layer flexible and elastic adhesive layer 403; the elastic deformation capacity of the skin surface flexible and elastic adhesive layer 401 and the upper layer flexible and elastic adhesive layer 403 is greater than that of the elastic sheet body of the lower layer 4022 of the base strip; the upper surface of the upper layer flexible and elastic adhesive layer 403 is provided with a shaped protective paper.

[0043] The setting mode of the fixed end of the wound pulling-together unit 300 depends on the structure mode of the wound pulling-together unit 300, the wound pulling-together unit 300 of the utility model can be implemented by referring to the prior art, and can adopt the structure of multiple groups of one-way ratchet gears arranged at intervals and cooperating with lock buckles, or can adopt the structure of multiple groups of one-way pull strips arranged at intervals and cooperating with adhesive tapes. Regardless of the structure mode of the one-way ratchet gear or the one-way pull strip, the fixed end of the pull strip can be embedded between the flexible and elastic adhesive layer 401 on the skin surface and the upper flexible and elastic adhesive layer 403, and the lock buckle and the adhesive tape need to be correspondingly arranged in the reserved hole on the upper flexible and elastic adhesive layer 403, so that the lock buckle and the adhesive tape are exposed, thereby realizing the fixation of the free end of the pull strip. In the preferred embodiment shown in the drawings of the utility model, the pull strip is a bidirectional pull type, and then the fixed end of the pull strip can be correspondingly embedded between the flexible and elastic adhesive layer 401 on the skin surface and the upper flexible and elastic adhesive layer 403, and the specific implementation mode can be referred to the preferred embodiment in the following text.

[0044] It can be understood that the flexible and elastic adhesive layer 401 on the skin surface needs to be adhered to the skin, and is preferably provided with a self-adhesive layer and is additionally provided with release paper. According to the literal meaning of the flexible and elastic adhesive layer, it can be known that the material layer has certain flexibility and elastic deformation capacity, the flexible and elastic adhesive layer 401 on the skin surface and the upper flexible and elastic adhesive layer 403 can adopt an elastic material that simulates the elastic variable of the skin, and are relatively softer, can better conform to the activity of the skin and stretch, and the specific material can be reasonably selected by the person skilled in the art according to the ordinary technical knowledge in the prior art. Considering that the material of the flexible and elastic adhesive layer is too soft and the form cannot be fixed, and is easy to be adhered to each other after being separated from the release paper, the utility model is additionally provided with a shaping protection paper on the top layer, the pull-together device is fixed in the flexible material, and the fixed form of the whole pull-together device is ensured (the upper and lower flexible and elastic adhesive layers are ensured to be flat, not curled and not peeled off), after being adhered to the skin surface and being fixed, the shaping protection paper is removed to restore the flexibility of the upper and lower flexible and elastic adhesive layers. In the implementation, the upper flexible and elastic adhesive layer 403 and the shaping protection paper thereof, and the flexible and elastic adhesive layer 401 on the skin surface and the release paper thereof can be respectively pre-processed into an integral structure, and then the integral structure is formed by using the static pressure process.

[0045] When the wound is suitable for the joint part and the area near the joint, the flexible and elastic adhesive layer 401 on the skin surface and the upper flexible and elastic adhesive layer 403 can change according to the change of the skin of the human body, and the spacing between the adjacent base tapes and the upper base sheet can be adaptively adjusted by using the elastic deformation capacity of the flexible and elastic adhesive layer 401 on the skin surface, the upper flexible and elastic adhesive layer 403 and the base tape lower layer 4022 to adapt to the change of the skin, thereby ensuring the reliability of the whole wound pulling-together device.

[0046] It can be understood that no matter what form the wound pulling unit 300 adopts, it generally comprises at least a plurality of groups of stay, and the fixed end of the stay is a stay fixed sheet. In some embodiments, the upper base sheet of the base strip and the stay fixed sheet connected thereto are an integral structure, that is, the stay fixed sheet at the fixed end of each group of wound pulling unit 300 serves as the base strip. This structure is relatively simple and easy to implement.

[0047] Preferably, the wound pulling unit 300 comprises first and second stays 301 and 302 which are arranged in opposite directions and have central axes located in the same vertical plane (the central axis of the first and second stays 301 and 302 refers to the center line of the long axis of the single strip-shaped stay body), the first stay 301 is fixedly connected with the skin pasting unit 400 on one side, the second stay 302 is fixedly connected with the skin pasting unit 400 on the other side, the free end of the first stay 301 has a guide hole 3011 for the second stay 302 to pass through (the free end of the first stay 301 refers to the part of the first stay 301 which is not fixed on the skin pasting unit 400), the adjacent contact surfaces of the first and second stays 301 and 302 are provided with a fixing device 303, and the first and second stays 301 and 302 have a first state of relatively freely moving along the axis direction of the guide hole 3011 under the constraint of the guide hole 3011, and a second state of fixing the relative positions of the first and second stays 301 and 302 after the upper and lower overlapping parts are fixed by the fixing device 303. Specifically, the fixed end of each first stay 301 has a first stay fixed sheet, the first stay fixed sheet is connected with the corresponding upper base sheet of the base strip, and is integrally embedded between the skin surface flexible and elastic pasting layer 401 and the upper flexible and elastic pasting layer 403 on one side. The fixed end of each second stay 302 has a second stay fixed sheet, the second stay fixed sheet is connected with the corresponding upper base sheet of the base strip, and is integrally embedded between the skin surface flexible and elastic pasting layer 401 and the upper flexible and elastic pasting layer 403 on the other side. In some embodiments, the first stay fixed sheet and the corresponding upper base sheet of the base strip can be an integral structure, and the second stay fixed sheet and the corresponding upper base sheet of the base strip can be an integral structure.

[0048] The two stays in the utility model are symmetrically arranged or approximately symmetrically arranged, and the guide hole 3011 matched with the second stay 302 is arranged on the first stay 301 (that is, the size of the guide hole 3011 is matched with the size of the second stay 302), and in the implementation, the first and second stays 301 and 302 can form an upper and lower overlapping part instead of being arranged in a staggered manner, and after being pulled into position, the upper and lower stays can be fixed at the middle position, and the middle position only refers to the area between the two skin pasting units 400, and is not necessarily the middle position of a group of stays.

[0049] The fixing device 303 can be an adhesive or a double-sided adhesive layer, or a fixing device with a surface occlusion fixation relationship (for example, "magic tape"). It can be understood that, according to the selection of the fixing device 3, the fixing device 303 can be fixed to any one surface of the adjacent contact surface of the first pull strip 301 and the second pull strip 302, or to the outer surface of the two pull strips respectively, for example, the adhesive, the double-sided adhesive layer can be arranged on the first pull strip 301 and the second pull strip 302, and the "magic tape" is arranged as a "female buckle" and the other is arranged as a "male buckle". In order to avoid affecting the operation when pulling together, a release protection paper 304 is temporarily covered on the surface of the fixing device 303, so as to realize the first state that the first pull strip 301 and the second pull strip 302 are freely moved along the long axis direction of the guide hole 3011 under the constraint of the guide hole 3011. When the release protection paper 304 is removed, the second state that the relative positions of the two are fixed can be realized.

[0050] The preferred scheme in the embodiment is a double-sided high-strength adhesive tape with a release protection paper 304. One side of the double-sided high-strength adhesive tape is fixed on an arbitrary pull strip in advance, and after pulling together, the release protection paper is removed to realize the adhesive fixing of the upper and lower pull strips. A first pull strip 301 and a second pull strip 302 correspond to each other to form a group of pull strips, and the stress direction of the same group of pull strips is basically on the same horizontal line during bidirectional pulling, and the fixed position is the middle overlapping part of the pull strips, so that the suture force can be completely symmetrically transmitted in the middle, thereby evenly dispersing the force to the skin adhesive units on both sides, effectively improving the wound pulling effect. In addition, after the above structure design of the utility model is adopted, the first pull strip 301 and the second pull strip 302 can realize flat design, and the hardness requirement of the material is low, and flexible inelastic material can be used (the specific material can be selected by the person skilled in the art according to the technical knowledge), and the skin is not easily damaged during implementation, and the patient's touch feeling is better.

[0051] The "symmetrical arrangement" above means that the pull strip body structures on both sides are completely symmetrical, regardless of the difference of the guide hole 3011. The "approximately symmetrical arrangement" means that the width and length dimensions of the pull strips on both sides can be slightly different, as long as the center axes of the two can be aligned, so that the stress direction of the same group of pull strips is basically on the same horizontal line, and the adhesive fixing point is in the middle region. The preferred scheme is symmetrical arrangement.

[0052] Preferably, the free end of the first pull strip 301 has a widened first handle part 3012, the width of the first handle part 3012 is greater than the width of the first pull strip 301, a guide hole 3011 for the second pull strip 302 to pass through is arranged in the width direction of the first handle part 3012, the guide hole 3011 penetrates the upper and lower surfaces of the first handle part 3012, adjacent first handle parts 3012 are connected and fused with each other in the width direction, that is, multiple first pull strips 301 share one first handle part 3012, which is convenient for medical staff to operate with one hand. After the above scheme is adopted, the width size of the guide hole 3011, the width size of the strip-shaped body of the first pull strip 301, and the width size of the strip-shaped body of the second pull strip 302 can be designed to be the same, and then the complete symmetrical arrangement of the two pull strips can be realized, which is beneficial to force balance. Similarly, the free end of the second pull strip 302 has a widened second handle part 3021, adjacent second handle parts 3021 are connected and fused with each other in the width direction, that is, multiple second pull strips 302 share one second handle part 3021, which is convenient for medical staff to operate with one hand. After the above structure is adopted, the doctor can operate conveniently, when pulling and combining in two directions, only the first handle part 3012 and the second handle part 3021 need to be pinched with fingers respectively; the multiple pull strips are linked together by the handle parts, which is convenient for the doctor to complete once, and multiple operations are not needed. Moreover, the second handle part 3021 cannot slide out of the guide hole 3011 reversely due to the limitation of the second handle part 3021, which is beneficial to the stability of the structure. Referring to the implementation process described above, the fixing device 303 (preferably a double-sided high-strength adhesive tape) generally only needs to be fixed on an arbitrary pull strip of the same group of pull strips in advance, and then a release protection paper 304 is correspondingly arranged. The shape of the release protection paper 304 can be designed according to the principle of being convenient for one-time tearing, and generally can be composed of multiple strip-shaped parts and one tearing operation end, and the strip-shaped parts and the pull strip body correspond to each other respectively.

[0053] Referring to Figure 9In some other embodiments, the guide hole 3011 can take the form of a guide tunnel 3013, which is arranged in the middle of the first stay 301 (the middle refers to the region between the "first stay fixing piece" and the "first handle part 3012"). The guide tunnel 3013 is used for the stay body of the second stay 302 to pass through, and thus the inner hole cross-sectional shape thereof should be adapted to the shape of the second stay 302, which is a strip shape extending in the width direction of the second stay 302. The guide tunnel 3013 is generally composed of an upper sheet layer, a lower sheet layer, and a transition part connecting the two side parts of the upper and lower sheet layers. The upper sheet layer at one axial end of the guide tunnel 3013 is fixedly connected to the stay body of the first stay 301 having the first handle part 3012, and the lower sheet layer at the other axial end of the guide tunnel 3013 is fixedly connected to the stay body of the first stay 301 having the first stay fixing piece. After the guide tunnel 3013 is used in the structural form, the position of the fixing device 303 can generally be designed in the region where the guide tunnel 3013 is located.

[0054] The utility model can also be used in combination with the support frame assembly 100, and the wound dressing assembly 200 is arranged at the bottom of the support frame assembly 100. The support frame assembly 100 is provided with a stay hole 101 through which the first stay 301 and the second stay 302 pass. In implementation, the support frame assembly 100 and the wound dressing assembly 200 are located between the two skin adhesive units 400 and are arranged in the region above the wound. The adhesive fixing parts of the first stay 301 and the second stay 302 generally coincide with the stay hole 101. In order to facilitate operation, the fixing device 303 generally adopts the preferred scheme of being provided with release protection paper 304. The release protection paper 304 is extended along the glue surface part to a length that can be operated by both hands, and a plurality of release protection papers are connected together at the tail part (i.e. a plurality of stays share one release protection paper 304, which facilitates the doctor to remove the release protection paper at one time. The wound dressing assembly 200 can be fixed at the bottom of the support frame assembly 100 through a sliding connecting piece. In order to facilitate operation, reference is made to Figures 6 to 8, preferably, the support frame assembly 100 is composed of an upper wing plate, a lower wing plate and a vertical web plate 102, the cross section of which is a "I-shaped" structure, and the web plate 102 is provided with a plurality of strip holes 101 at intervals for accommodating the first and second strips 301 and 302; the lower wing plate serves as a guide rail 103 for connecting the guide groove 201 at the top of the dressing assembly 200, and the guide groove 201 of the dressing assembly 200 can freely slide along the long axis of the guide rail 103 or slide out of the ends of the guide rail 103 to release the sliding connection with the guide rail 103; the guide groove 201 encircles the guide rail 103, and the groove edge of the guide groove 201 is matched on the web plate 102 (generally in a clearance fit, and the groove edges of the two side ends of the guide groove 201 are provided in a "V" shape extending inward (i.e. the V-shaped guide port 202 shown in the figure, the groove edge of the guide groove 201 is guided from the widest part of the "V" shape to the restraining fit with the web plate 102, i.e. the wide side of the V-shaped guide port 202 faces outward, and the narrow side faces inward; the end of the guide rail 103 has a V-shaped guide head 104 matched with the groove of the guide groove 201, and correspondingly, the V-shaped guide head 104 has the narrow side facing outward and the wide side facing inward, gradually transitioning from the narrower end to the body width of the guide rail 103. After using the above structure, the separation and assembly between the support frame assembly 100 and the wound dressing assembly 200 can be more conveniently realized, which facilitates the medical staff to replace the wound dressing.

[0055] It can be understood that one strip hole 101 can correspond to one group of strips, or can correspond to multiple groups of strips at the same time, and the preferred solution is that each group of strips corresponds to pass through the same strip hole 101, and each group of strips is axially constrained at two different positions in the long axis direction by the strip hole 101 and the guide hole 3011, which can better ensure that the suture forces on both sides are distributed along the same straight line.

[0056] Specifically, the wound dressing assembly 200 is composed of a hemostatic dressing or an antibacterial dressing and a porous film of a wrapping dressing; the sealing method of the edge of the porous film is heating fusion or ultrasonic welding.

Claims

1. A wound retractor, comprising a wound retractor unit (300) and a skin adhesive unit (400); the skin adhesive unit (400) is used to adhere and fix the skin surface on both sides of the wound, the wound retractor unit (300) is connected to the skin adhesive unit (400) on both sides, the skin adhesive unit (400) comprises a skin surface flexible and elastic adhesive layer (401) used to adhere directly to the skin surface and a base tape (402) used to fixedly connect the wound retractor unit (300), the base tape (402) is fixedly arranged on the near-wound side of the upper surface of the skin surface flexible and elastic adhesive layer (401), and the outer edge of the base tape (402) does not exceed the outer edge area of the skin surface flexible and elastic adhesive layer (401); characterized in that: The baseband (402) on each skin pasting unit (400) comprises a baseband upper layer (4021) and a baseband lower layer (4022), the baseband upper layer (4021) is fixedly arranged on the upper surface of the baseband lower layer (4022), and the outer edge of the baseband upper layer (4021) does not exceed the outer edge of the baseband lower layer (4022); the fixed end of the wound pulling unit (300) is connected to the baseband upper layer (4021), and the fixed end of the wound pulling unit (300) is not directly connected to part of the skin surface flexible and elastic pasting layer (401); the baseband lower layer (4022) comprises an elastic sheet body which can be stretched and deformed in the plane direction, a plurality of strip-shaped reinforcing ribs (4023) are arranged in the elastic sheet body, the strip-shaped reinforcing ribs (4023) are arranged in the direction parallel to the long axis of the wound at intervals, the axis of a single strip-shaped reinforcing rib (4023) is perpendicular to the long axis of the wound, and the strip-shaped reinforcing rib (4023) and the baseband upper layer substrate are made of a non-stretchable material.

2. The wound retractor of claim 1, wherein: The skin pasting unit (400) further comprises an upper flexible and elastic pasting layer (403) for covering the skin surface flexible and elastic pasting layer (401), the surface of the baseband (402) and the fixed end of the wound pulling unit (300); at least the baseband lower layer (4022) is fixedly arranged between the skin surface flexible and elastic pasting layer (401) and the upper flexible and elastic pasting layer (403) on one side, the baseband upper layer (4021) is arranged between the skin surface flexible and elastic pasting layer (401) and the upper flexible and elastic pasting layer (403) on one side or in the reserved hole in the upper flexible and elastic pasting layer (403), and the fixed end of the wound pulling unit (300) is arranged between the skin surface flexible and elastic pasting layer (401) and the upper flexible and elastic pasting layer (403) on one side or in the reserved hole in the upper flexible and elastic pasting layer (403); the elastic deformation capacity of the skin surface flexible and elastic pasting layer (401) and the upper flexible and elastic pasting layer (403) is greater than that of the elastic sheet body of the baseband lower layer (4022); and the upper surface of the upper flexible and elastic pasting layer (403) is provided with a shaping protection paper.

3. The wound retractor of claim 1, wherein: The wound pulling unit (300) is at least two groups arranged at intervals along the long axis direction of the wound, the baseband upper layer (4021) is composed of a plurality of baseband upper layer substrates arranged at intervals along the long axis direction of the baseband lower layer (4022), there is a spacing between the adjacent two baseband upper layer substrates or the adjacent two baseband upper layer substrates are in contact or connected through a tearable structure, and the fixed end of the wound pulling unit (300) located on the same skin pasting unit (400) is connected to different baseband upper layer substrates.

4. The wound retractor of claim 1, wherein: The fixed end of the wound pulling unit (300) is a strip fixed base, the strip fixed base is fixedly arranged on the upper surface of the baseband upper layer substrate, and the outer edge of the strip fixed base does not exceed the outer edge of the baseband upper layer substrate; and the strip fixed base is in a sheet shape.

5. The wound retractor of any one of claims 1 to 3, wherein: The wound pulling unit (300) comprises a first pull strip (301) and a second pull strip (302) which are oppositely arranged and have central axes located in the same vertical plane, the first pull strip (301) is fixedly connected with the skin sticking unit (400) on one side, the second pull strip (302) is fixedly connected with the skin sticking unit (400) on the other side, the free end of the first pull strip (301) has a guide hole (3011) through which the second pull strip (302) passes, the adjacent contact surfaces of the first pull strip (301) and the second pull strip (302) are provided with a fixing device (303), the first pull strip (301) and the second pull strip (302) have a first state of relatively freely moving along the axis direction of the guide hole (3011) under the constraint of the guide hole (3011), and a second state of fixing the relative positions of the first pull strip (301) and the second pull strip (302) after the upper and lower overlapping parts are fixed by the fixing device (303).

6. The wound retractor of claim 5, wherein: The fixing device (303) is an adhesive, a double-sided adhesive paste layer or a fixing device with a surface occlusion fixing relationship; a temporary anti-adhesion separation layer is temporarily covered on the outer surface of the fixing device (303).

7. The wound retractor of claim 5, wherein: The free end of the first pull strip (301) has a widened first pull handle part (3012), the guide hole (3011) passes through the upper and lower surfaces of the first pull handle part (3012) in the width direction of the first pull handle part (3012), and adjacent first pull handle parts (3012) are connected and fused with each other in the width direction; the free end of the second pull strip (302) has a widened second pull handle part (3021), and adjacent second pull handle parts (3021) are connected and fused with each other in the width direction; the fixed end of each first pull strip (301) has a first pull strip fixing sheet, and the first pull strip fixing sheet is connected with the corresponding upper base sheet of the base strip; the fixed end of each second pull strip (302) has a second pull strip fixing sheet, and the second pull strip fixing sheet is connected with the corresponding upper base sheet of the base strip.

8. The wound retractor of claim 5, wherein: The free end of the first pull strip (301) has a widened first pull handle part (3012), and adjacent first pull handle parts (3012) are connected and fused with each other in the width direction; the free end of the second pull strip (302) has a widened second pull handle part (3021), and adjacent second pull handle parts (3021) are connected and fused with each other in the width direction; the fixed end of each first pull strip (301) has a first pull strip fixing sheet, and the first pull strip fixing sheet is connected with the corresponding upper base sheet of the base strip; the fixed end of each second pull strip (302) has a second pull strip fixing sheet, and the second pull strip fixing sheet is connected with the corresponding upper base sheet of the base strip; the guide hole (3011) is a guide tunnel (3013) arranged in the middle of the first pull strip (301), the upper sheet layer at one end of the guide tunnel (3013) is fixedly connected with the first pull strip (301) having the first pull handle part (3012), and the lower sheet layer at the other end of the guide tunnel (3013) is fixedly connected with the first pull strip (301) having the first pull strip fixing sheet.

9. The wound retractor of claim 5, wherein: The application relates to a support frame assembly (100) and a wound dressing assembly (200), the support frame assembly (100) is located between two skin adhesive units (400), the wound dressing assembly (200) is installed at the bottom of the support frame assembly (100), the support frame assembly (100) is composed of an upper wing plate, a lower wing plate and a vertical web plate (102), the cross section is a "I-shaped" structure, first and second pull strips (301) and (302) are arranged on the web plate (102) at intervals, and pull strip holes (101) for accommodating the first and second pull strips (301) and (302) are arranged on the web plate (102); the lower wing plate is used as a guide rail (103) to connect a guide groove (201) at the top of the dressing assembly (200), the guide groove (201) of the dressing assembly (200) can freely slide in the long axis direction of the guide rail (103) or slide out of the two ends of the guide rail (103) to release the sliding connection relationship with the guide rail (103); the guide groove (201) surrounds the guide rail (103), the groove edge of the guide groove (201) is matched on the web plate (102), the groove edges of the two side ends of the guide groove (201) are arranged in a "V"-shaped form extending inward, the groove edge of the guide groove (201) is guided to start from the widest part of the "V"-shaped form and transition to the constraint matching relationship with the web plate (102); the end of the guide rail (103) is provided with a V-shaped guide head (104) matched with the groove of the guide groove (201).

10. The wound retractor of claim 9, wherein: A first pull strip (301) and a second pull strip (302) correspond to each other to form a group of pull strips, each group of pull strips corresponds to passing through a same pull strip hole (101), and each group of pull strips is axially constrained by the pull strip holes (101) and guide holes (3011) at two different positions on the same axis in the long axis direction.

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