Negative pressure drainage device
By setting multiple drainage holes on the closed layer of the negative pressure drainage device and adding sealing caps on the drainage holes, the problems of drainage holes and uneven distribution of negative pressure are solved, and more efficient wound drainage and healing effects are achieved.
Patent Information
- Application Number
- CN202421203646.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-05-30
AI Technical Summary
In the existing negative pressure closed drainage technology, the small drainage hole leads to blockage problems, and the negative pressure distribution is uneven, affecting the uniformity of wound healing.
A negative pressure drainage device is designed, with multiple drainage holes arranged at intervals on the sealing layer and a sealing cap is provided on the drainage holes. The drainage pipe fittings include a detachable connected drainage branch and a drainage main pipe, and the dressing structure is polyethylene foam with a mesh structure.
It effectively avoids drainage blockage, promotes the uniformity of negative pressure distribution, improves the uniformity of wound healing and the effect of dredging and drainage.
Smart Images
Figure CN222871036U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical care, and in particular relates to a negative pressure drainage device. Background Art
[0002] The principle of negative pressure drainage is a commonly used medical technology that can help patients drain exudate from the wound, relieve pain and inflammation, promote the growth of granulation tissue, and thus promote wound healing.
[0003] In the existing negative pressure closed drainage technology, two drainage tubes with multiple drainage holes are usually wrapped in a porous foam cushion, and then the porous foam cushion is placed on the wound surface or in the wound body cavity, and the porous foam cushion and the outlet end of the drainage tube are tightly sealed with a sealing film to isolate them from the outside world. The drainer is connected and then connected to the negative pressure source to form an efficient drainage system. Under the action of negative pressure, necrotic tissue and purulent exudate at the wound surface will be sucked out through the drainage holes on the drainage tube, clearing the wound surface, accelerating local blood flow, improving wound microcirculation, promoting wound healing, and shortening treatment time.
[0004] However, in the above-mentioned existing negative pressure closed drainage technology, since the drainage hole is small, during the process of negative pressure suction, the solid matter carried by the blood and tissue fluid on the wound surface is easy to block the drainage hole when entering the drainage tube from the drainage hole. Since the drainage tube is arranged in a porous foam cushion, it is difficult to flush out the blocked substances on the drainage hole with sterile saline, so drainage blockage is prone to occur, which has a certain impact on the subsequent drainage work. In addition, when performing negative pressure drainage, only the negative pressure intensity close to the drainage tube position is larger, and the negative pressure intensity far away from the drainage tube position is small, resulting in uneven negative pressure distribution, resulting in certain differences in the degree of healing of wounds at different positions. Utility Model Content
[0005] Therefore, the technical problem to be solved by the utility model is to overcome the negative pressure closed drainage structure in the prior art. Since the drainage holes on the drainage tube in the porous foam cushion are small, during the negative pressure suction process, the solid matter carried by the blood and tissue fluid on the wound surface can easily block the drainage holes when entering the drainage tube from the drainage holes, resulting in drainage blockage. It is necessary to frequently flush with sterile saline, which increases a certain amount of workload and time and has a certain impact on the subsequent drainage work. The technical problem is thus provided, thereby providing a negative pressure drainage device.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A negative pressure drainage device comprises a sealing layer, a supporting layer, an adhesive layer, a drainage tube and a dressing structure; the sealing layer is arranged in a hemispherical shape, and a plurality of drainage holes are provided through the end surface of the sealing layer at intervals; the supporting layer is connected to the inner wall of the bottom end of the sealing layer in a ring shape; the adhesive layer is arranged integrally with the sealing layer and is surrounded by the outer wall of the bottom end of the sealing layer in a ring shape, and an adhesive area is provided at the bottom end of the adhesive layer; the dressing structure is placed between the sealing layer and the supporting layer, and its top end surface is in contact with the inner wall of the sealing layer; one end of the drainage tube is detachably connected above the drainage hole, and the other end is connected to the negative pressure aspirator.
[0008] In an optional implementation, the sealing layer is made of silicone material and has a certain thickness.
[0009] In an optional embodiment, a sealing cap is detachably inserted on the drainage hole, and the sealing cap is connected to the top end surface of the sealing layer through a connecting piece.
[0010] In an optional embodiment, the sealing cap is made of rubber material, and includes a sealing column and an annular cover plate connected to the sealing column. The outer diameter of the sealing column is the same as the inner diameter of the drainage hole, and the outer diameter of the cover plate is larger than the outer diameter of the sealing column.
[0011] In an optional embodiment, a toggle plate is radially connected to the outer periphery of the cover plate.
[0012] In an optional embodiment, the drainage tube includes a drainage branch tube and a drainage main tube, and there are at least two drainage branch tubes. One end of the drainage branch tube is detachably connected to the drainage hole via a first connector, and the other end is connected to one end of the drainage main tube via a second connector having multiple connection ports. The other end of the drainage main tube is connected to the negative pressure aspirator.
[0013] In an optional embodiment, the first connector includes a sleeve, which is detachably mounted above the drainage hole, the drainage branch pipe is connected to the top of the sleeve and communicates with the interior of the sleeve, and a rubber pad is attached to the inner wall of the sleeve.
[0014] In an optional embodiment, it further includes a water delivery device, the delivery device includes a water delivery pipe, one end of the water delivery pipe is connected to the drainage main pipe through a mounting head, and the other end of the water delivery pipe is connected to the water supply unit.
[0015] In an optional embodiment, the dressing structure is a polyethylene foam with a mesh structure.
[0016] Compared with the prior art, the technical solution of the utility model has the following advantages:
[0017] 1. The utility model has drainage holes on the closed layer, so that blockage is not easy to occur during the drainage process. After blockage, the drainage holes are exposed to the outside world, so it is easy to wash away the blockage, the drainage effect is better, and drainage blockage is not easy to occur later.
[0018] 2. The utility model has a plurality of drainage holes evenly spaced on the drainage layer, so that the negative pressure distribution on the entire porous cushion is relatively uniform during drainage, thereby making the negative pressure on the wound surface relatively uniform, and it is less likely to cause inconsistent wound healing.
[0019] 3. The utility model has a plurality of drainage holes evenly spaced on the sealing layer and sealing caps on the drainage holes, so that the drainage holes can be used for wounds of different areas and are suitable for wounds of different sizes, with high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the utility model;
[0021] Figure 2 This is a schematic diagram of the top view of the sealing layer of the utility model;
[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the sealing layer of the utility model;
[0023] Figure 4 for Figure 1 A magnified view of the structure at center A;
[0024] Figure 5 This is a schematic diagram of the structure of the first connector of the utility model;
[0025] Wherein, the accompanying drawings are marked as follows:
[0026] 1. Sealing layer; 11. Drainage holes; 12. Support layer; 13. Adhesive layer;
[0027] 2. Dressing structure; 3. Drainage branch tube; 31. Sleeve; 4. Drainage main tube; 5. Water pipe; 6. Water supply unit; 7. Negative pressure suction device; 8. Sealing column; 81. Cover plate; 82. Pull plate; 83. Connecting strip. DETAILED DESCRIPTION
[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0029] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.
[0030] The present embodiment discloses a negative pressure drainage device, comprising a sealing layer 1, a supporting layer 12, an adhesive layer 13, a drainage tube and a dressing structure; the sealing layer 1 is arranged in a hemispherical shape, and a plurality of drainage holes 11 are opened at intervals on the end surface of the sealing layer 1; the supporting layer 12 is arranged in a ring shape and fits on the inner wall of the bottom end of the sealing layer 1; the adhesive layer 13 is arranged integrally with the sealing layer 1 and is surrounded in a ring shape on the outer wall of the bottom end of the sealing layer 1, and an adhesive area is provided at the bottom end of the adhesive layer 13; the dressing structure 2 is placed between the sealing layer 1 and the supporting layer 12, and its top end face is fitted with the inner wall of the sealing layer 1; one end of the drainage tube is detachably connected to the top of the drainage hole 11, and the other end is connected to the negative pressure aspirator 7.
[0031] The utility model has drainage holes 11 on the sealing layer 1, so that blockage is not likely to occur during the drainage process, and after blockage, since the drainage holes 11 are exposed to the outside world, it is easy to wash away the blockage, the drainage effect is better, and drainage blockage is not likely to occur later; by evenly arranging a plurality of drainage holes 11 on the sealing layer 1 at intervals, the negative pressure distribution on the entire dressing structure 2 is more uniform during drainage, thereby making the negative pressure on the wound surface more uniform, and it is less likely to have inconsistent wound healing degrees.
[0032] Preferably, the sealing layer 1 is made of silicone material and has a certain thickness. Silicone material is a soft plastic material. When the air in the space enclosed by the sealing layer 1 is sucked out, the sealing layer 1 can sink downward and undergo a certain deformation, so as to seal the wound surface tightly. Compared with sealing with a thinner semipermeable membrane, it is more firm and less likely to fall off.
[0033] In the above embodiment, the sealing layer 1 in the middle part of the whole device is protruding upward, and the adhesive layer 13 around it is horizontal. The space formed by the upward protruding part is used to place the dressing structure 2. The supporting layer 12 is used to support the dressing structure 2 to prevent the dressing structure 2 from falling down after being placed therein. In order to avoid the dressing structure 2 being unable to fit tightly on the wound surface when the supporting layer 12 is placed on the skin due to being too thick, the supporting layer 12 can be set to a thin layer, as long as the dressing structure 2 can be confined therein. When in use, the dressing structure 2 is covered on the wound surface, and the supporting layer 12 surrounds the wound surface. The entire device is attached to the skin through the action of the adhesive layer 12, so that the wound surface can be surrounded by a closed environment.
[0034] Furthermore, the dressing structure 2 is a polyethylene foam with a mesh structure. Specifically, the density of the polyethylene foam is 0.01-0.1g / cm3, the porosity of the polyethylene foam is greater than 90%, and the compressive strength of the polyethylene foam is 5-100kPa. The polyethylene foam with these parameters is highly plastic. When the negative pressure of suction is too large (within the allowable pressure), the polyethylene foam is not easily over-squeezed to cause its density to be too large, the pore size of the foam material to become smaller, and the permeability to become poor, resulting in poor drainage effect or failure.
[0035] In the above embodiment, the polyethylene foam is inserted into the upwardly arched area of the sealing layer 1, that is, between the support layer 12 and the sealing layer 1. The shape of the polyethylene foam is the same as the shape of the sealing layer 1, both are hemispherical, which can better fit with the sealing layer 1 to improve the drainage effect. When the adhesive layer 13 is in use, an adhesive is attached to the bottom end. After the polyethylene foam is aligned with the wound surface and covered on the wound surface, the adhesive is attached to the skin around the wound surface to surround the wound surface, so that the wound surface forms a closed space. After that, a drainage device is connected to the corresponding drainage hole 11 according to the size of the wound surface to evenly drain.
[0036] In an optional embodiment, a sealing cap is detachably inserted on the drainage hole 11, and the sealing cap is connected to the top end face of the sealing layer 1 through a connector. The sealing cap is made of rubber material, and includes a sealing column 8 and an annular cover plate 81 connected to the sealing column 8. The outer diameter of the sealing column 8 is the same as the inner diameter of the drainage hole 11, and the outer diameter of the cover plate 81 is larger than the outer diameter of the sealing column 8. A toggle plate 82 is radially connected to the outer periphery of the cover plate 81. By providing a sealing cap on the drainage hole 11, the drainage hole can be used for wounds of different areas, and is suitable for wounds of different sizes, with strong flexibility.
[0037] In the above embodiment, the drainage hole 11 is sealed and blocked by the sealing column 8 to avoid air leakage during the negative pressure drainage process. The cover plate 81 and the sealing column 8 can be easily pulled out by the action of the toggle plate 82. The connecting piece is a connecting strip 83 made of rubber. The sealing cap can be fixed by the action of the connecting strip 83 to avoid the sealing cap being randomly placed and easily contaminated or lost when the drainage hole 11 is opened for use. By arranging the sealing cap on the drainage hole 11, it can be opened when in use and sealed when not in use. In this way, the area covered by the drainage hole 11 can be used according to wounds of different sizes, which is more convenient to use.
[0038] In an optional embodiment, the drainage pipe fitting includes a drainage branch tube 3 and a drainage main tube 4, and there are at least two drainage branch tubes 3. One end of the drainage branch tube 3 is detachably connected to the drainage hole 11 through a first connector, and the other end is connected to one end of the drainage main tube 4 through a second connector having multiple connection ports. The other end of the drainage main tube 4 is connected to the negative pressure aspirator 7.
[0039] Furthermore, the first connector includes a sleeve 31, which is detachably mounted above the drainage hole 11, the drainage branch pipe 3 is connected to the top of the sleeve 31 and communicates with the interior of the sleeve 31, and a rubber pad is attached to the inner wall of the sleeve 31.
[0040] In the above embodiment, the drainage branch tube 3 can be directly connected to the drainage hole 11 through the action of the sleeve 31, and can be pulled out after use. A rubber pad is attached to the inner wall of the sleeve 31 to prevent outside air from flowing in from the gap between the inner wall of the sleeve 31 and the outer wall of the drainage hole 11, affecting the drainage effect. Each drainage main tube 4 can be connected to two to four drainage branch tubes 3. When multiple drainage holes 11 are needed, multiple drainage branch tubes 3 can be used for connection respectively, and then three or four drainage branch tubes 3 are connected to the same drainage main tube 4 through a three-way connector or a four-way connector, and then the multiple drainage main tubes 4 are connected to the same negative pressure aspirator 7 to perform negative pressure drainage at the same time.
[0041] In an optional embodiment, it also includes a water delivery device, which includes a water delivery pipe 5. One end of the water delivery pipe 5 is connected to the drainage pipe through a mounting head, and the other end is connected to a water supply unit 6. The water supply unit 6 is a water tank or other water storage structure equipped with a small water pump. When not in use, the mounting head is closed to prevent the exudate discharged during negative pressure drainage from flowing into the water delivery pipe 5.
[0042] In the above embodiment, water can be passed into the drainage main pipe 4 through the action of the water supply unit 6 to prevent the exudate from being too thick and causing blockage at the intersection of the drainage main pipe 4 and the multiple drainage branches 3. Passing water into the drainage main pipe 4 can mix the relatively thick exudate at this location with the aqueous solution and then dilute it, making it less likely to cause blockage. Specifically, during negative pressure drainage through the negative pressure suction device 7, the water supply unit 6 is closed, and the connection between the drainage main pipe 4 and the water supply pipe 5 is clamped by a clamp. When the exudate becomes thicker during drainage, the connection between the drainage main pipe 4 and the negative pressure suction device 7 is clamped by a clamp and the negative pressure suction device 7 is closed to prevent the aqueous solution from being sucked into the negative pressure suction device 7. Then, the water supply unit 6 is opened again to supply water into the drainage main pipe 4 through the water supply pipe 5. After mixing with the thick exudate to make the exudate thinner, the water supply unit 6 can be closed, and then the negative pressure suction device 7 can be opened. The exudate mixed with the aqueous solution can be sucked away together by the action of the negative pressure suction device 7.
[0043] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any person skilled in the art may make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and the changes and modifications still fall within the scope of protection of the present invention.
Claims
1. A negative pressure drainage device, characterized in that: include: The sealing layer is hemispherical, and a plurality of drainage holes are provided on the end surface of the sealing layer at intervals; A supporting layer, in a ring shape, is arranged on the inner side wall of the bottom end of the sealing layer; An adhesive layer, which is integrally provided with the sealing layer and is in a ring shape and surrounds the outer side wall of the bottom end of the sealing layer, and an adhesive area is provided at the bottom end of the adhesive layer; A dressing structure is placed between the sealing layer and the supporting layer, and its top end surface is in contact with the inner side wall of the sealing layer; The drainage tube has one end detachably connected above the drainage hole and the other end connected to the negative pressure aspirator.
2. The negative pressure drainage device according to claim 1, characterized in that: The sealing layer is made of silicone material and has a certain thickness.
3. The negative pressure drainage device according to claim 1, characterized in that: A sealing cap is detachably inserted on the drainage hole, and the sealing cap is connected to the top end surface of the sealing layer through a connecting piece.
4. The negative pressure drainage device according to claim 3, characterized in that: The sealing cap is made of rubber material and includes a sealing column and an annular cover plate connected to the sealing column. The outer diameter of the sealing column is the same as the inner diameter of the drainage hole, and the outer diameter of the cover plate is larger than the outer diameter of the sealing column.
5. The negative pressure drainage device according to claim 4, characterized in that: The outer periphery of the cover plate is radially connected with a toggle plate.
6. The negative pressure drainage device according to claim 1, characterized in that: The drainage pipe fitting includes a drainage branch pipe and a drainage main pipe, and there are at least two drainage branch pipes. One end of the drainage branch pipe is detachably connected to the drainage hole through a first connector, and the other end is connected to one end of the drainage main pipe through a second connector having multiple connection ports. The other end of the drainage main pipe is connected to the negative pressure aspirator.
7. The negative pressure drainage device according to claim 6, characterized in that: The first connector includes a sleeve, which is detachably mounted above the drainage hole, the drainage branch pipe is connected to the top of the sleeve and communicates with the interior of the sleeve, and a rubber pad is attached to the inner wall of the sleeve.
8. The negative pressure drainage device according to claim 6, characterized in that: It also includes a water delivery device, which includes a water delivery pipe, one end of which is connected to the drainage main pipe through a mounting head, and the other end of which is connected to the water supply unit.
9. The negative pressure drainage device according to claim 1, characterized in that: The dressing structure is polyethylene foam with a mesh structure.