A negative pressure drainage dressing system

Abstract

The utility model discloses a negative pressure drainage dressing system, which is suitable for drainage of a large area of ​​wounds and solves the problem that when draining a large area of ​​wounds, the drainage effect is poor at a position far away from the drainage tube orifice; a negative pressure drainage dressing system, wherein the tube body of the drainage tube is a hollow tubular structure, a plurality of drainage holes are arranged on the side surface of the tube body, and a spiral drainage part is arranged inside the tube body for guiding and accelerating the flow of liquid; the pitch of the end of the spiral drainage part far away from the negative pressure source is smaller than the pitch of the end close to the negative pressure source; the drainage hole is a special-shaped drainage hole, which is formed by connecting an inner drainage port and an outer drainage port, and the size of the inner drainage port is smaller than the size of the outer drainage port, and is a similar elliptical shape, at which time the inner drainage port and the outer drainage port are connected to form a guide surface for guiding liquid to quickly enter the drainage tube; the drainage tube is embedded in the dressing to form a dressing system.

Description

Technical Field

[0001] The utility model relates to the technical field of wound care, in particular to a negative pressure drainage dressing system. Background Art

[0002] Negative pressure sealed drainage is a treatment method that uses a foam dressing containing a drainage tube and a biological semipermeable membrane to seal the top of the dressing to form an enclosed space above the wound. The drainage tube is connected to a negative pressure source to promote wound healing through controllable negative pressure. It helps to expel the small necrotic tissue formed in the wound from the body in time, promoting wound healing. It is a new method for treating complex wounds and for deep drainage.

[0003] But in actual use, such as Figure 1 As shown in the figure, the positional relationship between the drainage tube and the dressing is shown. The drainage position is fixed and single. Due to the local position of the drainage tube, the drainage is uneven, which affects the drainage efficiency. There is a risk of fluid accumulation at a location far from the drainage tube orifice. The accumulation of fluid will lead to slow wound healing or increased risk of infection. Due to the ease of use of this type of dressing and drainage tube, it is still widely used in clinical practice. Experienced doctors can build a simple negative pressure drainage system by themselves using gauze or sponge with a drainage tube, which is low-cost.

[0004] For wounds with large drainage volume, professional dressings are still needed. On this basis, Figure 2 The improvement shown is to set up multiple drainage tubes and change them into an umbrella-shaped structure with the center as the gathering point, which can attract liquid more evenly and make drainage more timely and smooth. However, this method does not fully consider the relationship between drainage area and drainage quality. For wounds with larger areas, the distance between the end of each drainage tube and the center is too long, and the drainage effect will be greatly reduced. At this time, multiple dressing systems need to be spliced ​​and used. Utility Model Content

[0005] The utility model discloses a negative pressure drainage dressing system, which is suitable for drainage of a large area of ​​wounds and solves the problem of poor drainage effect at a position far from a drainage tube orifice during drainage of a large area of ​​wounds.

[0006] In order to achieve the above purpose, the following technical solutions are adopted:

[0007] A negative pressure drainage dressing system, wherein the body of the drainage tube is a hollow tubular structure, a plurality of drainage holes are arranged on the side surface of the tube body, a spiral drainage portion is arranged inside the tube body for guiding and accelerating the flow of liquid; the pitch of the spiral drainage portion at one end away from the negative pressure source is smaller than the pitch of the end close to the negative pressure source; the drainage hole is a special-shaped drainage hole, which is formed by connecting an inner drainage port and an outer drainage port, and the size of the inner drainage port is smaller than the size of the outer drainage port, and is a similar elliptical shape, at which time the inner drainage port and the outer drainage port are connected to form a guide surface for guiding liquid to quickly enter the drainage tube; the drainage tube is embedded in the dressing to form a dressing system.

[0008] Furthermore, the ratio of the number of the drainage holes located on the upper side of the drainage tube to the number of the drainage holes located on the lower side is 1:2 or 1:3, and the lower side is the side close to the wound surface when in use.

[0009] Furthermore, the spiral drainage portion is formed by a spiral line protruding on the inner surface, and the height of the protrusion is 2-5 mm.

[0010] Furthermore, the ratio of the pitch of the spiral drainage portion at one end away from the negative pressure source to the pitch of the spiral drainage portion at one end close to the negative pressure source is 1:2 or 1:3.

[0011] Furthermore, one end of the inner drainage port and the outer drainage port having similar shapes are located on the same longitudinal axis.

[0012] Furthermore, the guide surface of the special-shaped drainage hole is located on the side away from the negative pressure source.

[0013] Furthermore, the center of the dressing system is a central connector connected to the negative pressure source, and a plurality of drainage tubes are evenly connected around the central connector.

[0014] Furthermore, the end of the spiral drainage portion with a smaller pitch is arranged away from the central connecting piece.

[0015] The utility model has the following beneficial effects:

[0016] There are several drainage holes on the drainage tube, which can better absorb the liquid around the drainage tube; the internal spiral drainage part plays the role of internal auxiliary drainage, and the farther away from the negative pressure source, the smaller the pitch. The benefit of this design is that it provides more "grip" at the end far away from the negative pressure source, helping the liquid to overcome the resistance in a static state and start to move in the direction of the negative pressure source. Once the liquid accelerates and enters the inside of the pipe, the pitch becomes larger and larger. At this time, the spiral drainage part helps to reduce resistance and facilitate the flow of liquid. Under the attraction of the negative pressure source, the liquid is smoothly sucked out;

[0017] The drainage hole is designed as a special-shaped drainage hole, thereby forming a small guide surface at the location of the drainage hole, and the liquid will enter the drainage tube more smoothly along the guide surface;

[0018] The optimization of the above two aspects is also more helpful for the drainage of large-area wounds, which is equivalent to adding a lot of power to absorb distant fluids into the drainage tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a commonly used negative pressure drainage tube and its dressing system in the prior art;

[0020] Figure 2 It is a schematic diagram of an improved negative pressure drainage tube and its dressing system in the prior art;

[0021] Figure 3 It is a schematic diagram of the structure of the negative pressure drainage tube in Example 1 of the utility model;

[0022] Figure 4 It is a front view schematic diagram of the negative pressure drainage tube in Example 2 of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the special-shaped drainage hole in Example 3 of the utility model;

[0024] Figure 6 It is a schematic diagram of the drainage effect in Example 3 of the utility model;

[0025] Figure 7 It is a schematic diagram of the drainage dressing system in Example 4 of the utility model.

[0026] Among them, 1-dressing, 2-drainage tube, 100-new type drainage tube, 110-tube body, 120-drainage hole, 130-spiral drainage part, 140-first end, 150-second end, 200-special-shaped drainage hole, 210-inner drainage port, 220-outer drainage port, 230-guiding surface, 300-central connecting piece. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the examples of the implementation of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only representative embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.

[0028] Drainage and dressing systems in the prior art such as Figure 1 and Figure 2As shown, one method is to wrap the drainage tube 2 in the dressing 1, and then wrap the whole on the wound surface with a film. This dressing system is simple to construct, so it is still the main method used in clinical practice. However, when the wound is large, the surrounding area is far away from the negative pressure source (connected to the drainage tube), resulting in untimely liquid absorption, which easily causes exudate accumulation and makes it difficult for the wound to recover. Based on this, there are now improved Figure 2 In the dressing system shown, there are multiple drainage tubes 2, which are evenly distributed 360° in the dressing 1. In this case, there are multiple openings in the surrounding area for suction, thereby reducing the risk of fluid accumulation. Figure 2 In the drainage dressing system of this type, the end of the drainage tube away from the central gathering point will still be far away from the negative pressure source (the negative pressure source is installed at the central gathering position), and the drainage effect will be greatly reduced. It still cannot meet the suction drainage requirements of large-area wounds. Therefore, the drainage tube is further improved and optimized to make it more able to meet the requirements of negative pressure drainage of large-area wounds, thereby saving consumables or the use of negative pressure sources. Example 1

[0029] like Figure 3 As shown, the novel drainage tube 100 is still a hollow cylindrical structure as a whole, and there are several drainage holes 120 evenly or unevenly distributed on the side surface of the tube body 110. One way is that the number of drainage holes 120 is less on one side of the tube body 110 and more on the other side. The drainage tube is assembled into the dressing, the side with fewer holes is located on the upper side, and the side with more holes is located on the lower side. The lower side is in contact with the wound surface, and the drainage fluid is mainly sucked and drained from the bottom. When the drainage fluid absorbed by the dressing penetrates into the top of the dressing, the drainage holes 120 on the top can also attract and drain the exudate. When there is too much exudate in the upper layer, it means that the dressing needs to be replaced. At this time, it is not a problem of insufficient number of drainage ports. This design method can increase the drainage effect on the lower side, and also enable the drainage fluid sucked into the tube body 110 to flow out along the inner wall of the tube body, and will not flow out to the outside of the drainage tube due to too many drainage holes on the top. The appropriate ratio of the number of the drainage holes 120 on the lower side to that on the upper side is 2:1 or 3:1.

[0030] The inner surface of the tube body 110 is provided with a spiral drainage portion 130, which is formed by a spiral line protruding on the inner surface, and the height of the protrusion is 2-5mm; or it is composed of a spiral surface, such as Figure 6As shown. The advantage of the spiral drainage portion 130 formed by the spiral line is that it can construct a spiral drainage path without occupying too much internal space of the drainage tube. The advantage of the spiral drainage portion 130 formed by the spiral surface is that the spiral drainage path is smoother, but its disadvantage is that part of the internal space of the drainage tube must be sacrificed. However, both types of spiral drainage portions 130 can achieve the purpose of diversion, because the spiral provides additional surface area, increases the contact area between the liquid and the tube wall, and can also reduce the resistance of the liquid flow when flowing along the drainage tube. Example 2

[0031] On the basis of Example 1, the structure is further optimized to obtain a better drainage effect, such as Figure 4 As shown, the end of the tube body 110 away from the negative pressure source is the first end 140, and the end close to the negative pressure source is the second end 150; the spiral drainage portion 130 of the first end 140 is tighter, that is, the pitch is smaller, and the spiral drainage portion 130 of the second end 150 is looser, that is, the pitch is larger. The ratio of the minimum pitch at the first end 140 to the maximum pitch at the second end 150 is 1:2 or 1:3.

[0032] The advantage of this design is that the first end 140 has a smaller pitch, and in the early stage of the liquid entering the tube body 110, the spiral drainage portion 130 can provide more "grip" to help the liquid overcome the resistance in a static state and start to move toward the second end 150. Once the liquid accelerates and enters the area near the second end 150, the spiral drainage portion 130 with a larger pitch helps reduce resistance, facilitates the flow of the liquid, and the liquid is smoothly sucked out under the attraction of the negative pressure source. Example 3

[0033] On the basis of Example 1 or 2, the structure of the drainage hole is further optimized and designed into a special-shaped drainage hole 200 to obtain a better drainage effect, such as Figure 5 As shown, the special-shaped drainage hole 200 is a drainage hole with a guide surface 230 formed by connecting an inner drainage port 210 and an outer drainage port 220. Specifically, the inner drainage port 210 and the outer drainage port 220 are elliptical, and the size of the inner drainage port 210 is smaller than the size of the outer drainage port 220. One end of the inner drainage port 210 and the outer drainage port 220 are located on the same longitudinal axis, and the inner drainage port 210 and the outer drainage port 220 are connected to form a surface to form a guide surface 230.

[0034] like Figure 6 As shown, the benefit of this design is that it can better guide the liquid. The liquid flows along the guide surface, which will reduce resistance and make it easier to guide the liquid into the tube body 110. Therefore, when the special-shaped guide hole 200 is set on the guide tube, the side where the guide surface 230 is located is the side away from the negative pressure source. At this time, the liquid will "slide" into the tube body along the guide surface 230 and flow along the spiral guide portion 130 in the tube body. Example 4

[0035] like Figure 7 As shown, a case of constructing a dressing system based on the drainage tube of Example 2 or 3 is shown. In this embodiment, the dressing system consists of a dressing 1, four new drainage tubes 100 and a hollow hole 300, wherein the four new drainage tubes 100 are fixedly connected to the central connecting piece and have the same interior, the upper end of the central drainage hole is connected to a negative pressure source, the new drainage tubes 100 are evenly arranged at 360° and the first end 140 is away from the central connecting piece 300, and the second end 150 is connected to the central connecting piece 300. The new drainage tube 100 and the central connecting piece 300 are located on the same plane and are completely embedded in the dressing 1.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description of the present invention and its drawings should also be included in the protection scope of the present invention.

Claims

1. A negative pressure drainage dressing system, wherein: The body of the drainage tube is a hollow tubular structure, characterized in that there are several drainage holes on the side surface of the tube body, and a spiral drainage part is provided inside the tube body for guiding and accelerating the flow of liquid; the pitch of the spiral drainage part at the end away from the negative pressure source is smaller than the pitch of the end close to the negative pressure source; the drainage hole is an irregular drainage hole, which is formed by connecting an inner drainage port and an outer drainage port, and the size of the inner drainage port is smaller than the size of the outer drainage port, and is a similar elliptical shape. At this time, the inner drainage port and the outer drainage port are connected to form a guide surface for guiding the liquid to quickly enter the drainage tube; the drainage tube is embedded in the dressing to form a dressing system.

2. A negative pressure drainage dressing system according to claim 1, characterized in that: The ratio of the number of the drainage holes located on the upper side of the drainage tube to the number of the drainage holes located on the lower side is 1:2 or 1:3, and the lower side is the side close to the wound surface when in use.

3. A negative pressure drainage dressing system according to claim 1, characterized in that: The spiral drainage part is formed by the protrusion of the spiral line on the inner surface, and the height of the protrusion is 2-5mm.

4. A negative pressure drainage dressing system according to claim 1, characterized in that: The ratio of the pitch of the spiral drainage portion at one end away from the negative pressure source to the pitch of the spiral drainage portion at one end close to the negative pressure source is 1:2 or 1:

3.

5. The negative pressure drainage dressing system according to claim 1, characterized in that: One ends of the inner drainage port and the outer drainage port, which are similar in shape, are located on the same longitudinal axis.

6. A negative pressure drainage dressing system according to claim 5, characterized in that: The guide surface of the special-shaped drainage hole is located at the side away from the negative pressure source.

7. The negative pressure drainage dressing system according to claim 1, characterized in that: The center of the dressing system is a central connector connected to a negative pressure source, and a plurality of drainage tubes are evenly connected around the central connector.

8. A negative pressure drainage dressing system according to claim 7, characterized in that: The end of the spiral drainage part with a smaller pitch is arranged away from the central connecting piece.

Images