Negative pressure dressing device for wound healing

Abstract

The present invention discloses a negative pressure dressing device for wound healing, which belongs to the field of wound treatment technology. The device comprises a support frame, a flexible negative pressure fitting member is provided at the bottom of the support frame, a negative pressure extraction member connected to an external negative pressure device is provided on the support frame, the support frame is connected to a switching end via a sliding connection member, and the switching end is provided with a medicine squeezing roller, a medicine coating roller, and a film coating roller; a protective cover is provided on the support frame, and the protective cover is connected to two oppositely arranged push buttons via a limit connection member, and the bottom of the push button is connected to a pressure plate via a pressure rotating rod. The present invention uses the film coating roller to coat the wound with a sealing film, and the constant pressure frame and the pressure plate are pressed down synchronously to form a pre-pressurized sealing environment, and the pressure in the sealed environment is increased, so that the gas in the wound area below is discharged, a stable pressure field is established before negative pressure extraction, the drug penetration time is prolonged, and the situation in which the negative pressure device causes the drug liquid to be extracted occurs is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wound treatment, and in particular to a negative pressure dressing device for wound healing. Background Art

[0002] Negative pressure wound therapy is an advanced technology that promotes wound healing through controllable negative pressure. It is often used to treat complex or difficult-to-heal wounds. It uses vacuum pump suction to create negative pressure in the system pipelines, achieving the purpose of continuous or intermittent wound drainage or providing a negative pressure environment to assist wound closure. It is used to remove cavity or wound secretions and necrotic tissue.

[0003] In the process of wound treatment, in order to quickly heal the wound, the wound is often subjected to negative pressure treatment. The first step is to debride the wound. After debridement, in order to avoid exudation and help the wound recover, some treatments will add a certain amount of liquid medicine to treat the wound, and then cover the wound with a dressing. Through negative pressure extraction, a closed environment is formed by medical sponge and sealing film, and 75-125mmHg negative pressure is applied continuously or intermittently to help the wound recover. In current use, when negative pressure extraction is performed by negative pressure equipment, when the sealing film has not yet fully contacted with the skin, a negative pressure space is often not generated. Medical staff need to first fit the sealing film tightly to the skin before proceeding to the next step. There is a risk of infection when touching the wound, and some liquid medicine will be extracted first during negative pressure extraction, which greatly reduces the effectiveness of the liquid medicine. As a result, most subsequent treatments do not use the liquid medicine plus negative pressure method for treatment. Based on this, a negative pressure dressing device for wound healing is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a negative pressure dressing device for wound healing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A negative pressure dressing device for wound healing, comprising a support frame, a flexible negative pressure fitting member provided at the bottom of the support frame, a negative pressure extraction member connected to an external negative pressure device provided on the support frame, the support frame being connected to a switching end via a sliding connection, the switching end being provided with a medicine squeezing roller, a medicine coating roller, and a film coating roller;

[0007] A protective cover is provided on the support frame seat, and the protective cover is connected to two relatively arranged push buttons through a limiting connecting piece. The bottom of the push button is connected to a pressure plate through a pressure rotating rod. The pressure plate is connected to a constant pressure frame through an elastic biasing piece. The constant pressure frame is provided with a corresponding opening that is adapted to the negative pressure extraction piece.

[0008] As a preferred solution, the negative pressure extraction component includes a butt joint cover and a flat tube, the butt joint cover is provided with an air connection pipe, the end of the flat tube is provided with a plurality of suction pipes, and the suction holes of the suction pipes are arranged downward.

[0009] As a preferred solution, the sliding connection member includes a rectangular moving opening opened on the support frame seat, the side wall of the switching end is fixedly connected with a push rod passing through the rectangular moving opening, and a knob is provided at the end of the push rod.

[0010] As a preferred solution, a sealing film is wound on the coating roller, an adhesive layer for adhering the sealing film is provided on one side of the support frame seat, the interior of the medicine extrusion roller is hollow, and medicine extrusion holes are provided on its surface.

[0011] As a preferred solution, the limiting connector includes a sliding opening opened on the top of the protective cover, the push button is slidably connected to the inner wall of the sliding opening through a sliding block, and the contact surface of the sliding block is provided with a magnetic layer.

[0012] As a preferred solution, the pressure-applying rotating rod includes a U-shaped connecting seat fixedly arranged on the pressure plate, and the bottom of the sliding block is rotatably connected to the U-shaped connecting seat through the pressure rod.

[0013] As a preferred solution, the elastic biasing member includes a connecting block arranged on the side wall of the constant pressure frame, and L-shaped connecting plates are provided on both sides of the pressure plate. The L-shaped connecting plate is connected to the connecting block via a connecting spring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention realizes uniform application of medicine to wound tissue by cooperating with the medicine squeezing roller and the medicine coating roller, ensuring full contact between the medicine and the wound surface, and realizes automatic and uniform bonding of the sealing film by cooperating with the film coating roller and the constant pressure frame, eliminating the need for medical staff to manually press the wound, thereby significantly reducing infection caused by direct contact with the wound surface.

[0016] 2. The present invention uses a coating roller to coat the wound with a sealing film, and the constant pressure frame and the pressure plate are pressed down synchronously to form a pre-pressurized sealing environment, and the pressure in the sealed environment is increased to discharge the gas in the wound area below, establish a stable pressure field before negative pressure extraction, prolong the drug penetration time, and avoid the situation where the negative pressure device causes the drug liquid to be extracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional assembly structure of a negative pressure dressing device for wound healing proposed by the present invention;

[0018] Figure 2 This is a schematic diagram of the combined state of a negative pressure compress device for wound healing proposed by the present invention;

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of a negative pressure dressing device for wound healing proposed by the present invention;

[0021] Figure 5 This is a schematic structural diagram of a sliding connector, a pressure-applying rotating rod, and an elastic biasing member in a negative pressure compress device for wound healing proposed by the present invention;

[0022] Figure 6 This is a schematic structural diagram of the positional relationship among the medicine squeezing roller, the medicine coating roller, and the film coating roller in a negative pressure applicator for wound healing proposed by the present invention;

[0023] Figure 7 This is a structural schematic diagram of a negative pressure extraction component in a negative pressure dressing device for wound healing proposed by the present invention.

[0024] In the figure: 1. Support frame; 2. Flexible negative pressure fitting; 3. Switching end; 4. Extrusion roller; 5. Coating roller; 6. Laminating roller; 7. Protective cover; 8. Push button; 9. Pressure plate; 10. Constant pressure frame; 11. Corresponding port; 12. Docking tube cover; 13. Flat tube; 14. Rectangular moving port; 15. Push rod; 16. Adhesion layer; 17. Sliding port; 18. Sliding block; 19. U-shaped connecting seat; 20. Pressure rod; 21. Connecting block; 22. L-shaped connecting plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0028] Example, see Figures 1 to 7 A negative pressure dressing device for wound healing comprises a support frame 1, a flexible negative pressure fitting 2 is provided at the bottom of the support frame 1, a negative pressure extraction component of an external negative pressure device is provided on the support frame 1, and a corresponding port 11 adapted to the negative pressure extraction component is opened on the constant pressure frame 10. Before laminating, the negative pressure extraction component is placed at the corresponding port 11 so that its suction pipe is in the center position, and then the gas under the sealing film is extracted under negative pressure through an external negative pressure device. The vacuum pump is used to suck to generate negative pressure in the system pipeline, thereby achieving the purpose of continuous or intermittent wound drainage or providing a negative pressure environment to assist wound closure, thereby meeting the effect of subsequent negative pressure therapy.

[0029] The negative pressure extraction component includes a butt joint cover 12 and a flat tube 13. The butt joint cover 12 is provided with an air connection pipe. The end of the flat tube 13 is provided with a plurality of suction pipes, and the suction holes of the suction pipes are arranged downward.

[0030] The support frame seat 1 is connected to the switching end 3 through a sliding connection. The sliding connection includes a rectangular moving opening 14 opened on the support frame seat 1. The side wall of the switching end 3 is fixedly connected to a push rod 15 that passes through the rectangular moving opening 14. A knob is provided at the end of the push rod 15.

[0031] The switching end 3 is provided with a medicine squeezing roller 4, a medicine coating roller 5 and a film coating roller 6. A sealing film is wrapped around the film coating roller 6. An adhesive layer 16 for adhering the sealing film is provided on one side of the support frame 1. The interior of the medicine squeezing roller 4 is hollow, and a medicine squeezing hole is provided on its surface. The medicine squeezing roller 4 is externally connected to a medicine injection device to inject the medicine liquid into the tissue from the medicine squeezing hole on the medicine squeezing roller 4.

[0032] It should be noted that the coating roller 6 is rotated near the adhesive layer 16, so that the coating roller 6 originally at the top is rotated to the bottom, and during the rotation, the adhesive layer 16 will contact the coating roller 6, thereby contacting the sealing film wrapped on the coating roller 6, and achieving the effect of adhesion of the sealing film.

[0033] A protective cover 7 is provided on the support frame seat 1, and the protective cover 7 is provided on one side of the support frame seat 1. When the constant pressure frame 10 is controlled to move downward, the medicine squeezing roller shaft 4, the medicine coating roller shaft 5 and the coating roller shaft 6 are all on the side not covered by the protective cover 7, so they will not affect the downward movement of the constant pressure frame 10. The protective cover 7 is connected to two relatively arranged push buttons 8 through a limiting connector. Furthermore, the limiting connector includes a sliding port 17 opened at the top of the protective cover 7. The push button 8 is slidably connected to the inner wall of the sliding port 17 through a sliding block 18. The contact surface of the sliding block 18 is provided with a magnetic layer. When the two sliding blocks 18 move toward the middle and contact, the two sliding blocks 18 can achieve the effect of mutual adsorption through the magnetic layer.

[0034] The bottom of the push button 8 is connected to the pressure plate 9 through a pressure rotating rod. Furthermore, the pressure rotating rod includes a U-shaped connecting seat 19 fixedly set on the pressure plate 9, and the bottom of the sliding block 18 is rotatably connected to the U-shaped connecting seat 19 through a pressure rod 20.

[0035] The pressure plate 9 is connected to the constant pressure frame 10 through an elastic biasing member, which includes a connecting block 21 arranged on the side wall of the constant pressure frame 10. L-shaped connecting plates 22 are arranged on both sides of the pressure plate 9, and the L-shaped connecting plates 22 are connected to the connecting block 21 through a connecting spring.

[0036] Under the action of the elastic biasing member, when the pressure plate 9 moves downward, the constant pressure frame 10 is simultaneously driven to move downward, so that the constant pressure frame 10 can contact the sealing film first, so that the constant pressure frame 10 will squeeze the sealing film and the skin to form a rectangular negative pressure area. The constant pressure frame 10 can ensure that the sealing film is in a pressure-applied and sealed state all around.

[0037] During wound healing, the present invention first disinfects the wound. After disinfection, the support frame 1 is placed on the wound. At this time, the switching end 3 is moved so that the medicine squeezing roller 4 and the medicine coating roller 5 below come into contact with the tissue at the wound. At this time, the medicine squeezing roller 4 is externally connected to a medicine injection device, which injects the medicine liquid from the medicine squeezing hole on the medicine squeezing roller 4 into the tissue. When the medicine coating roller 5 moves, the medicine liquid is evenly contacted with the tissue, thereby completing the medicine application to the tissue.

[0038] After the application of the medicine is completed, the film-coating roller 6 is rotated near the adhesive layer 16, thereby rotating the film-coating roller 6 that was originally on the top to the bottom. During the rotation, the adhesive layer 16 comes into contact with the film-coating roller 6, thereby making contact with the sealing film wrapped around the film-coating roller 6 and adhering the sealing film. At this time, by moving the switching end 3, the sealing film on the film-coating roller 6 can be brought into contact with the tissue. Under the action of the film-coating roller 6, the sealing film can be evenly contacted with the skin tissue.

[0039] When the sterile covering of the wound is completed, the push buttons 8 on both sides are moved toward the middle. During the movement, the pressure rod 20 connected to the push button 8 drives the pressure plate 9 connected to it through the U-shaped connecting seat 19 to move downward. At this time, the downward pressure of the pressure plate 9 drives the constant pressure frame 10 to be squeezed downward, so that the constant pressure frame 10 will squeeze the sealing film and the skin to form a rectangular negative pressure area. At this time, the constant pressure frame 10 cannot move, which will cause the pressure plate 9 to move downward. The pressure in the sealed space formed between the pressure plate 9, the constant pressure frame 10 and the sealing film will be increased as the pressure plate 9 moves downward. The sealing membrane will move downward, thereby continuously increasing the pressure. The sealing membrane will generate downward pressure due to the increased pressure from above. Under the action of this pressure, the gas originally in the wound will be squeezed by the pressure and discharged from the negative pressure extraction part, and the pressure generated downward by the pressure plate 9 acts on the sealing membrane at all places. The pressure is equal, so the sealing membrane will be evenly stressed, so that the originally applied liquid medicine can be in uniform contact with the skin. When the pressure is completed, the liquid medicine will not be sucked out in advance even if the negative pressure device is used for extraction, thereby ensuring the effect of wound coating and negative pressure treatment.

[0040] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A negative pressure dressing device for wound healing, comprising a support frame (1), characterized in that: A flexible negative pressure fitting part (2) is provided at the bottom of the support frame (1), a negative pressure extraction part of an external negative pressure device is provided on the support frame (1), the support frame (1) is connected to a switching end (3) via a sliding connection part, and a medicine squeezing roller shaft (4), a medicine coating roller shaft (5) and a film coating roller shaft (6) are provided on the switching end (3); The support frame seat (1) is provided with a protective cover (7), the protective cover (7) is connected to two push buttons (8) arranged opposite to each other through a limit connection member, the bottom of the push button (8) is connected to a pressure plate (9) through a pressure rotating rod, the pressure plate (9) is connected to a constant pressure frame (10) through an elastic biasing member, and the constant pressure frame (10) is provided with a corresponding opening (11) adapted to the negative pressure extraction member.

2. A negative pressure compress device for wound healing according to claim 1, characterized in that: The negative pressure extraction component comprises a butt-joint tube cover (12) and a flat tube (13); an air connection tube is provided on the butt-joint tube cover (12); and a plurality of air suction tubes are provided at the end of the flat tube (13); and the air suction holes of the air suction tubes are arranged downward.

3. A negative pressure applicator for wound healing according to claim 1, characterized in that: The sliding connection member comprises a rectangular moving opening (14) opened on the support frame seat (1), a push rod (15) passing through the rectangular moving opening (14) is fixedly connected to the side wall of the switching end (3), and a knob is provided at the end of the push rod (15).

4. A negative pressure applicator for wound healing according to claim 1, characterized in that: A sealing film is wound around the coating roller (6), an adhesive layer (16) for adhering the sealing film is provided on one side of the support frame (1), and the medicine extrusion roller (4) is hollow inside and has medicine extrusion holes on its surface.

5. The negative pressure compress device for wound healing according to claim 1, characterized in that: The position-limiting connection member comprises a sliding opening (17) opened on the top of the protective cover (7); the push button (8) is slidably connected to the inner wall of the sliding opening (17) via a sliding block (18); and a magnetic layer is provided on the contact surface of the sliding block (18).

6. A negative pressure compress device for wound healing according to claim 5, characterized in that: The pressure-applying rotating rod comprises a U-shaped connecting seat (19) fixedly arranged on the pressure plate (9), and the bottom of the sliding block (18) is rotatably connected to the U-shaped connecting seat (19) via the pressure rod (20).

7. The negative pressure compress device for wound healing according to claim 1, characterized in that: The elastic biasing member comprises a connecting block (21) arranged on the side wall of the constant pressure frame (10), L-shaped connecting plates (22) are arranged on both sides of the pressure plate (9), and the L-shaped connecting plate (22) is connected to the connecting block (21) via a connecting spring.

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