CN107670160A - The drainage tube of surrounding tissue is destroyed when preventing from extracting - Google Patents

Abstract

The invention discloses a drainage tube for preventing damage to surrounding tissues when pulled out, comprising a tube body, a plurality of surrounding drainage holes are opened on the side wall of the tube body, and the hollow inside of the tube body is a negative pressure chamber; the drainage tube The hole is mainly composed of a plurality of protrusions protruding toward the middle of the drainage hole. The protrusions are distributed along the circumference of the drainage hole. The wall surface forming the drainage hole is formed between the connected bottoms. The side of the convex part facing the negative pressure chamber is provided with a guiding surface to facilitate the smooth shedding of surrounding tissues. The guiding surface is inclined from the inside to the outside of the convex part towards the middle of the drainage hole. The outer caliber is larger than the inner caliber; the surrounding tissue that grows inside the tube body can be smoothly shed off, and the process of pulling out the double cannula becomes simple without causing discomfort to the human body.

Description

Drains that prevent damage to surrounding tissue when pulled out

technical field

The invention relates to the technical field of medical devices, in particular to a drainage tube that prevents damage to surrounding tissues when pulled out.

Background technique

Surgical drainage is one of the indispensable measures for clinical treatment of many diseases, such as drainage of anastomotic stoma and operation area after surgery, and drainage of abscess cavity. The purpose of surgical drainage is to guide the pus, blood, and fluid between human tissues or body cavities to the outside of the body, so as to prevent wound healing from being affected after surgery.

There are many types of surgical drainage tubes used clinically, and there are four types of drainage tubes commonly used: Penrose drainage, closed Penrose drainage, closed drainage and cannula drainage. Penrose drainage is named after the American gynecologist Charles Bingham Penrose (1862-1925). Its structure is a soft rubber tube or silicone tube, which is similar to the hollow drainage structure placed under the skin. It uses the siphon principle of the capillary to drain the liquid, so it is passive. Drainage, easy to block. Because it is open drainage, it can also cause retrograde infection. In order to avoid retrograde infection caused by Penrose drainage, a closed drainage bag can be connected to one end of the Penrose, or even covered with an ostomy bag to isolate it from the outside world, which is called closed Penrose drainage. Cigarette drainage, which was widely used clinically, was eliminated because the gauze strips were easily blocked by fibrin aggregates in the peritoneal drainage fluid, and the effect was extremely poor. The drainage tube can drain digestive juice, peritoneal fluid, pus, incision exudate, etc. out of the body, reduce adhesion, and promote healing. When patients need to use the drainage tube, they need to pay attention to nursing care.

Among them, the drainage holes set on the wall of the surgical drainage tube are mostly cylindrical holes or tapered holes. Since the drainage tube stays in the human intestinal tract for a long time, generally ≥12 hours, the intestinal tissue in the intestinal tract keeps growing. , the intestinal tissue will protrude into the tube body along the cylindrical or conical drainage holes set on the wall of the drainage tube. When the drainage tube cleans the pus in the intestinal tract, surgery is required. After pulling out the drainage tube During the process, part of the mushroom-shaped intestinal tissue will block the opening inside the drainage hole, because there is no guide surface or guiding path for the breeding intestinal tissue to fall off the inside of the tube body smoothly because of the cylindrical or tapered drainage hole , and the diameter of the inner opening is smaller than that of the outer diameter, the intestinal tissue will be stuck inside the tube, and it will be difficult to fall off. If you continue to pull out the drainage tube, the intestinal tissue that grows inside the tube may be pulled out and cause bleeding, which will bring harm to the human body. In severe cases, it may lead to other symptoms.

Contents of the invention

The purpose of the present invention is to provide a drainage tube that prevents damage to the surrounding tissue when pulling out, so that the surrounding tissue that grows inside the tube body can fall off smoothly, the process of pulling out the drainage tube becomes simple, and it will not cause discomfort to the human body .

In order to achieve the purpose of the above invention, the present invention adopts the following technical solutions: the drainage tube that prevents the surrounding tissue from being damaged when pulled out includes a tube body, the side wall of the tube body is provided with a plurality of surrounding drainage holes, and the inside of the tube body The hollow is a negative pressure chamber; the drainage hole is composed of a plurality of protrusions protruding towards the middle of the drainage hole, the protrusions are distributed along the circumference of the drainage hole, and adjacent protrusions are enclosed to form a barrier for cleaning liquid to enter and exit. Opening, and the wall surface of the drainage hole is formed between the adjacent convex part and the bottom connected with the tube body. The side of the convex part facing the negative pressure chamber is a guiding surface for the smooth shedding of surrounding tissues. The guiding surface is from the inside of the convex part to the The outer side is inclined towards the middle of the drainage hole, and the inner diameter of the opening is larger than the outer diameter.

Preferably, the convex part is a thin-walled sheet, and the convex part and the tube body are integrally structured, and the convex part is circular, oval or curved; when the surrounding tissue moves from the inside of the drainage hole to the outside, the surrounding tissue The thin-walled flake-shaped convex part can be easily pushed away to enlarge the opening of the drainage hole, and the surrounding tissue can fall off the tube smoothly. When the surrounding tissue falls off the tube body smoothly, the thin-walled flake-shaped convex part It can be quickly reset, and the convex part and the tube body are integrated, which is convenient for processing and manufacturing. The circular, oval or curved convex part is streamlined and smooth, and will not poke surrounding tissues and cause discomfort to the human body.

Because the surrounding tissue is generally irregular in shape, if the guiding surface is flat, on the one hand, the contact area between the surrounding tissue and the guiding surface is not sufficient, and the surrounding tissue will swing when moving outward along the guiding surface, and cannot follow the guiding surface well. The surface moves, causing the surrounding tissue to be stuck at the edge during the relative movement process. As a preference, the guide surface is in the shape of an arc surface, the two sides of the guide surface are higher than the middle, and the middle of the guide surface is concave inward; the surrounding tissue and the guide There are more contact surfaces between the surfaces, which can better accommodate irregular surrounding tissues, so that the guide surface is in a wrapping shape to support the surrounding tissues, and the guide surface guides the smooth movement of the surrounding tissues, which solves the problem of swinging and The phenomenon of getting stuck at the edge.

As a priority, the surface of the guide surface is smooth, and there is a rounding for smooth transition between the guide surface and the inner wall of the tube; when the surrounding tissue moves relatively along the smooth guide surface, the friction becomes smaller, the resistance decreases, and the surrounding tissue The movement is fast and smooth, and the rounding of the smooth transition between the guide surface and the inner wall of the tube protects the surrounding tissue from being stabbed during the movement, and also facilitates the movement of the surrounding tissue.

When the drainage tube is inserted into the intestinal tract, if there is a raised part on the outer surface of the tube body, the outer surface of the tube body is not smooth, and the drainage tube will be stuck on the inner tissue of the intestinal tract during the process of extending into the intestinal tract. The resistance increases, and the movement of the drainage tube becomes extremely difficult. As a priority, the surface of the convex part located on the outside of the tube body is the same as the surface of the tube body, and the curved surface direction of the convex part and the surface of the tube body is flush; smooth The flush tube surface moves smoothly through the bowel without snagging on surrounding tissue.

Compared with the prior art, the drainage tube that prevents damage to the surrounding tissue when pulled out using the above technical solution has the following beneficial effects:

1. When the surrounding tissue moves relatively along the guide surface on the convex part, the flow is smooth, the resistance is small, and the surrounding tissue is easy to fall off from the tube body, which is convenient for medical personnel to operate.

2. The arc-shaped guide surface can better cover the surrounding tissue, hold the surrounding tissue to prevent it from swinging and stuck at the edge of the drainage hole, and also make the relative movement of the surrounding tissue smooth.

3. The convex part is thin-walled, and the surrounding tissue can easily push the convex part away. The outer opening of the convex part is turned outward, so that the diameter of the outer opening of the drainage hole becomes larger, and the surrounding tissue can easily fall off.

4. Since there is a convex part outside the drainage hole, the convex part has a certain blocking effect on the drainage hole, which can prevent the surrounding tissue from growing into the drainage tube to a small extent, forming a mushroom-shaped surrounding tissue, and preventing the drainage tube from causing damage when the drainage tube is pulled out. At the same time, the diameter of the hole formed in the middle of the convex part is smaller, so the size of the granulation tissue that can be formed in the hole in the width direction is smaller and rod-shaped, and the resistance will be smaller when the drainage tube is pulled out .

In the present invention, the drainage tube described is a basic abdominal medical device, and the drainage tube also has various similar devices or medical devices based on the drainage tube, such as double sleeves and the like.

Description of drawings

Fig. 1 is the sectional view of embodiment 1 of the drainage tube of the present invention that prevents damage to surrounding tissues when pulled out;

Fig. 2 is the schematic structural view of the drainage tube body that prevents damage to the surrounding tissue when pulling out in the present embodiment;

FIG. 3 is a schematic diagram of the structure of the convex part in the first embodiment.

Fig. 4 is the partial enlarged view of place B in Fig. 2 of present embodiment 1;

FIG. 5 is a schematic diagram of the internal structure of the drainage hole in Example 1;

Fig. 6 is the partial enlarged view of place A in Fig. 1 of the present embodiment 1;

FIG. 7 is a schematic diagram of the structure of the drainage hole in the second embodiment.

Reference signs: 1. Tube body; 3. Drainage hole; 30. Protrusion; 31. Opening; 32. Wall surface; 33. Guide surface; 4. Negative pressure chamber.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

Example 1:

As shown in Figures 1 to 7, the drainage tube for preventing damage to surrounding tissues when pulled out includes a tube body 1, a negative pressure chamber 4 inside the tube body 1, and a drainage hole 3. The drainage hole 3 is composed of a convex portion 30 and a wall surface 32. An opening 31 is formed between the protrusions 30 for the cleaning liquid to enter and exit, and the inner end of the protrusions 30 is a guide surface 33 .

Before the operation, the drainage tube needs to be inserted into the human intestinal tract to clean the pus in the human intestinal tract, and then remove the pus in the intestinal tract from the body. The drainage tube needs to be placed in the human intestinal tract for a long time. The general placement time: ≥12 hours, the tissue in the intestinal tract is in a state of continuous growth, and the surrounding tissue will grow into the inside of the tube body 1 along the drainage hole 3 opened on the periphery of the drainage tube , the surrounding tissue that grows inside the tube body 1 will form a mushroom shape, and the mushroom-shaped surrounding tissue will block the internal opening 31 of the drainage hole 3, and it will become difficult when the drainage tube is pulled out. Severe surrounding tissue, causing intestinal bleeding.

As shown in Figure 6, the surrounding tissue grows inside the drainage hole 3 of the tube body 1, and the drainage tube is slowly pulled out with a certain force, and the surrounding tissue moves relatively to the outside of the tube body 1 along the guide surface 33 in the drainage hole 3, Because the guide surface 33 is arc-shaped, and the two sides of the guide surface 33 are higher than the middle, and the center of the guide surface 33 is inwardly sunken, when the surrounding tissue moves relatively on the guide surface 33, the guide surface 33 will cover the surrounding tissue, support Hold the surrounding tissue to prevent the surrounding tissue from deviating from the guide surface 33 or stuck at the edge when it moves relatively, play a guiding role, and can make the movement of the surrounding tissue smoother. In addition, when the shape of the drainage hole 3 is cylindrical or conical Because the inner diameter of the drainage hole 3 is smaller than the outer diameter, the surrounding tissue that grows into the tube body 1 adheres to the inner wall of the tube body 1 and forms a mushroom-shaped surrounding tissue that blocks the inner opening 31 of the drainage hole 3 and pulls it outward. When the drainage tube comes out, the mushroom-shaped surrounding tissue will be stuck at the inner opening 31 of the drainage hole 3, and it will be difficult to fall off, and it may even be pulled off to cause bleeding; in the present invention, the guide surface 33 is from the inside to the outside of the convex part 30 toward the drainage hole 3 The middle is inclined, and the inner diameter of the opening 31 is larger than the outer diameter. When the surrounding tissue adheres to the inner wall of the tube body 1, under the action of the large-diameter inner opening 31, the mushroom-shaped surrounding tissue moves relatively smoothly, and The guide surface 33 and the inner wall of the tube body 1 are provided with a rounding for a smooth transition. When the surrounding tissue moves relatively along the smooth guide surface 33, the friction becomes smaller and the resistance is small. The movement of the surrounding tissue is fast and smooth, and it can also protect the surrounding tissues. Tissue is not poked.

As shown in Figure 3, the convex part 30 is a thin-walled sheet, and the surrounding tissue moves to the outer opening 31 of the drainage hole 3. The wall sheet-shaped convex portion 30 has low strength, and the surrounding tissue can easily push away the convex portion 30, and the convex portion 30 is gradually turned outward, so that the opening 31 outside the drainage hole 3 gradually becomes larger, and the surrounding tissue relatively moves to the tube body 1 Therefore, the outer part falls off smoothly, and when the surrounding tissue is completely separated from the tube body 1, the convex part 30 slowly recovers under the action of elastic recovery ability.

At the same time, the diameter of the hole formed in the middle of the convex part is smaller, so the size of the granulation tissue that can be formed in the hole in the width direction is smaller, and it is rod-shaped, and the resistance will be smaller when the drainage tube is pulled out (if the granulation tissue that was originally formed It is the shape of a mushroom, so the current shape is similar to Flammulina velutipes).

Example 2:

This embodiment is based on Embodiment 1. On the basis of Embodiment 1, the diameter of the convex part 30 concaved inward is increased, and the thickness of the arc-shaped convex part 30 is thinned.

As shown in Figure 7, an opening 31 for the cleaning liquid to enter and exit is enclosed between adjacent convex parts 30, and a wall surface 32 forming a drainage hole 3 is formed between adjacent convex parts 30 and the bottom connected to the pipe body 1 to guide The surface 33 is inclined to the middle of the drainage hole 3 from the inside to the outside of the convex part 30. The diameter of the outside of the opening 31 is greater than the diameter of the inside. The guide surface 33 is in the shape of an arc surface. Concave inwardly, the ratio of the diameter of the central depression of the convex part 30 in this embodiment to the diameter of the central concave of the convex part 30 in Embodiment 1 is 3:1.

In this way, the diameter of the inward depression in the middle part of the convex part 30 is increased and the thickness of the convex part 30 in the shape of the arc surface is set, so that when the surrounding tissue moves to the outer opening 31 of the drainage hole 3, only a small force can be pushed away. The part 30 passes through easily, reduces the resistance, and the shedding process of the surrounding tissue becomes simpler and easier; moreover, it can deal with some surrounding tissues with larger sizes, so that it can also be shed smoothly.

The above description makes the preferred implementation of the present invention, for those skilled in the art, without departing from the principle of the present invention, some modifications and improvements can be made, which should also be regarded as the protection scope of the present invention.

Claims (6)

1. destroy the drainage tube of surrounding tissue when preventing from extracting, including body (1), offer in described body (1) side wall more The individual conduction hole (3) around distribution, body (1) inner hollow is negative pressure cavity (4)；It is characterized in that：

It is provided with multiple convex portions (30) towards conduction hole (3) intermediate projections in described conduction hole (3), convex portion (30) are along conduction hole (3) circumferentially distributed, convex portion (30) enclose the opening (31) to be formed and be come in and gone out for cleaning fluid, and adjacent convex portion (30) and body (1) form the wall (32) of composition conduction hole (3) between the bottom of connection, convex portion (30) towards negative pressure cavity (4) one side for just In the smooth spigot surface (33) to come off of surrounding tissue, the spigot surface (33) by the inside of convex portion (30) to outside towards conduction hole (3) it is inclined to set among, the bore on the inside of opening (31) is more than its outside bore.

2. the drainage tube according to claim 1 for preventing from destroying surrounding tissue during extraction, it is characterised in that：The convex portion (30) it is the sheet of thin-walled, and convex portion (30) are structure as a whole with body (1).

3. the drainage tube according to claim 1 for preventing from destroying surrounding tissue during extraction, it is characterised in that：Described convex portion (30) it is circular, ellipse or curved.

4. the drainage tube according to claim 1 for preventing from destroying surrounding tissue during extraction, it is characterised in that：The spigot surface (33) it is in arc shape, higher than centre, spigot surface (33) is middle to cave inward for the both sides of spigot surface (33).

5. the drainage tube according to claim 4 for preventing from destroying surrounding tissue during extraction, it is characterised in that：Described guiding Face (33) surface is smooth, and spigot surface (33) is provided with the rounding for being used for smoothly transitting with body (1) inwall.

6. the drainage tube that surrounding tissue is destroyed when preventing from extracting according to claims 1 or 2, it is characterised in that：It is described It is the same face that convex portion (30), which is located at face on the outside of body (1) and body (1) surface, and convex portion (30) lateral surface and body (1) The curved surface direction on surface is concordant.