CN107670160B

CN107670160B - Drainage tube for preventing surrounding tissues from being damaged during pulling

Info

Publication number: CN107670160B
Application number: CN201710895115.5A
Authority: CN
Inventors: 应荣超; 金慧成; 朱阿考
Original assignee: Hangzhou First Peoples Hospital
Current assignee: Hangzhou First Peoples Hospital
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2023-06-16
Anticipated expiration: 2037-09-28
Also published as: CN107670160A

Abstract

The invention discloses a drainage tube for preventing surrounding tissues from being damaged during pulling out, which comprises a tube body, wherein a plurality of drainage holes distributed in a surrounding manner are formed in the side wall of the tube body, and a negative pressure cavity is formed in the interior of the tube body; the drainage hole mainly comprises a plurality of convex parts protruding towards the middle of the drainage hole, the convex parts are distributed along the circumferential direction of the drainage hole, openings for the cleaning liquid to go in and go out are formed between adjacent convex parts in a surrounding mode, a wall surface forming the drainage hole is formed between the adjacent convex parts and the bottom connected with the pipe body, one surface of each convex part facing the negative pressure cavity is provided with a guide surface which is convenient for surrounding tissues to smoothly fall off, the guide surfaces are obliquely arranged from the inner side to the outer side of each convex part towards the middle of the drainage hole, and the caliber of the outer side of each opening is larger than that of the inner side of each convex part; the double-sleeve pulling-out process is simple, and discomfort to a human body is avoided.

Description

Drainage tube for preventing surrounding tissues from being damaged during pulling

Technical Field

The invention relates to the technical field of medical instruments, in particular to a drainage tube for preventing surrounding tissues from being damaged during extraction.

Background

Surgical drainage is one of the indispensable measures for clinical treatment of many diseases, such as drainage of the postoperative stoma and the surgical field, drainage of the abscess cavity. The purpose of surgical drainage is to guide pus, blood and liquid in human tissue or body cavity to the outside of the body, and prevent the wound healing from being affected after the operation.

Surgical drainage tubes used clinically are of a large variety, and the drainage tubes commonly used are of 4 types: penrose drainage, closed drainage and sleeve drainage. Penrose drainage is named by Charles Bingham Penrose (1862-1925) of gynecologist in the United states, has a soft rubber tube or silica gel tube, is similar to a subcutaneous hollow drainage structure, and utilizes the siphon principle of a capillary tube to drain liquid, so that the Penrose drainage is passive drainage and easy to block. Since it is an open drain, retrograde infection can also be caused. In order to avoid retrograde infection caused by Penrose drainage, a closed drainage bag can be connected to one end of Penrose, and even an ostomy bag is covered to isolate the Penrose from the outside, which is called closed Penrose drainage. Cigarette drainage which is widely used in clinic is eliminated because the gauze strips are easily blocked by fibrin condensate in the peritoneal drainage liquid, and the effect is extremely poor. The drainage tube can drain digestive juice, peritoneal fluid, pus, incision exudates and the like to the outside of the body, reduce adhesion and promote healing, and care is needed when a patient needs to use the drainage tube.

The drainage hole arranged on the tube wall of the surgical drainage tube is mostly a cylindrical hole or a conical hole, the drainage tube stretches into the intestinal canal of a human body for a long time, the stay time of the drainage tube in the intestinal canal is generally more than or equal to 12 hours, intestinal tissues in the intestinal canal continuously grow, the intestinal tissues can stretch into the tube body along the cylindrical or conical drainage Kong Zi arranged on the tube wall of the drainage tube, when the drainage tube is used for cleaning pus in the intestinal canal, operation work is needed, in the process of pulling out the drainage tube, part of mushroom-shaped intestinal tissues can block an opening on the inner side of the drainage hole, and as the inner side of the cylindrical or conical drainage hole does not have a guiding surface or a guiding path for the growing intestinal tissues to smoothly fall off from the inner side of the tube body, the inner side opening caliber is smaller than the outer side caliber, the intestinal tissues can be blocked in the inner side of the tube body and are difficult to fall off, if the drainage tube is continuously pulled out, the intestinal tissues which grow in the tube can be pulled out to cause bleeding, discomfort is brought to a human body, and other symptoms can be caused under serious conditions.

Disclosure of Invention

The invention aims to provide a drainage tube for preventing surrounding tissues from being damaged during extraction, which can enable the surrounding tissues bred in the tube body to fall off smoothly, the extraction process of the drainage tube is simple, and discomfort to a human body is avoided.

In order to achieve the above object, the present invention adopts the following technical scheme: the drainage tube for preventing surrounding tissues from being damaged during pulling out comprises a tube body, wherein a plurality of drainage holes which are distributed in a surrounding manner are formed in the side wall of the tube body, and a negative pressure cavity is formed in the hollow part of the tube body; the drainage hole in be equipped with a plurality of protruding convex parts that face the drainage hole centre and constitute, the convex part distributes along drainage hole circumference, enclose between the adjacent convex part and combine and form the opening that supplies the washing liquid to come in and go out to form the wall that constitutes the drainage hole between the bottom that adjacent convex part and body are connected, the convex part is the guide surface that is convenient for the smooth and easy abscission of surrounding tissue towards one side of negative pressure chamber, the guide surface is the slope setting towards the drainage hole centre from the convex part inboard to the outside, the bore of opening inboard is greater than its outside bore.

Preferably, the convex part is thin-walled sheet-shaped, and the convex part and the pipe body are of an integrated structure, and the convex part is circular, elliptic or curved; when surrounding tissues move relatively outwards from the inner side of the drainage hole, the surrounding tissues can easily push away the thin-walled sheet-shaped protruding parts, so that the opening of the drainage hole is enlarged, the surrounding tissues can smoothly drop from the tube body, when the surrounding tissues smoothly drop from the tube body, the thin-walled sheet-shaped protruding parts can be quickly reset, the protruding parts and the tube body are of an integrated structure, the processing and manufacturing are convenient, the circular, elliptic or curved protruding parts are good in streamline shape and smooth, and the surrounding tissues cannot be stabbed to cause discomfort to a human body.

Because the surrounding tissue is generally in an irregular shape, if the guide surface is a flat surface, on the one hand, the contact area between the surrounding tissue and the guide surface is insufficient, the surrounding tissue swings when relatively moving outwards along the guide surface and cannot move well along the guide surface, so that the surrounding tissue possibly gets stuck at the edge in the process of relatively moving, and preferably, the guide surface is in a cambered surface shape, two sides of the guide surface are higher than the middle, and the middle of the guide surface is recessed inwards; the contact surface between the surrounding tissue and the guide surface is increased, the irregular surrounding tissue can be better accommodated, the guide surface is made to be in a cladding shape to support the surrounding tissue, the guide surface guides the surrounding tissue to move smoothly, and the phenomenon that the surrounding tissue swings and is blocked at the edge is solved.

Preferably, the surface of the guide surface is smooth, and the guide surface and the inner wall of the pipe body are provided with rounding for smooth transition; when the surrounding tissues relatively move along the smooth guide surface, friction is reduced, resistance is reduced, the movement of the surrounding tissues is quick and smooth, the smoothly-transited rounding on the guide surface and the inner wall of the tube body protects the surrounding tissues from being stabbed in the movement, and in addition, the movement of the surrounding tissues can be facilitated.

When the drainage tube stretches into the intestinal tract, if the outer surface of the tube body is provided with a convex part, the outer surface of the tube body is not smooth, the drainage tube can be blocked on the inner tissue of the intestinal tract in the process of stretching into the intestinal tract, the resistance is increased, the movement of the drainage tube becomes extremely difficult, and the convex part is positioned on the outer side of the tube body and is flush with the surface of the tube body as a priority, and the outer side of the convex part is flush with the curved surface direction of the surface of the tube body; the smooth and even tube body surface is smooth when moving in the intestinal tract, and can not be blocked on surrounding tissues.

Compared with the prior art, the drainage tube adopting the technical scheme for preventing surrounding tissues from being damaged during pulling has the following beneficial effects:

1. when the surrounding tissues relatively move along the guide surface on the convex part, the operation is smooth, the resistance is small, the surrounding tissues are easy to fall off from the tube body, and the operation of medical staff is convenient.

2. The cambered surface-shaped guide surface can better cover surrounding tissues, hold the surrounding tissues to prevent the surrounding tissues from swinging and being blocked at the edge of the drainage hole, and can also enable the relative movement of the surrounding tissues to be smooth.

3. The convex part is thin-walled sheet-shaped, surrounding tissues can easily push away the convex part, and the opening at the outer side of the convex part turns outwards, so that the caliber of the opening at the outer side of the drainage hole is increased, and the surrounding tissues can easily fall off.

4. The convex parts are arranged outside the drainage holes, so that the convex parts have a certain blocking effect on the drainage holes, and the peripheral tissues can be prevented from growing into the drainage tube to a small extent, mushroom-shaped peripheral tissues are formed, and secondary damage to the peripheral tissues caused by the drainage tube during the drawing-out is avoided; meanwhile, the aperture formed in the middle of the convex part is smaller, so that the size of the formed granulation tissue in the aperture in the width direction is smaller, the granulation tissue is rod-shaped, and the resistance is smaller when the drainage tube is pulled out.

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

Drawings

FIG. 1 is a cross-sectional view of an embodiment 1 of a drainage tube of the present invention for preventing damage to surrounding tissue upon removal;

FIG. 2 is a schematic view showing the structure of a drainage tube body for preventing surrounding tissues from being damaged when pulled out in the present embodiment;

fig. 3 is a schematic structural view of the convex portion in embodiment 1.

Fig. 4 is a partial enlarged view of fig. 2B of the present embodiment 1;

FIG. 5 is a schematic view showing the internal structure of the drainage hole in the present embodiment 1;

fig. 6 is a partial enlarged view of fig. 1 at a in the present embodiment 1;

fig. 7 is a schematic view of the structure of the drainage hole in this embodiment 2.

Reference numerals: 1. a tube body; 3. drainage holes; 30. a convex portion; 31. an opening; 32. a wall surface; 33. a guide surface; 4. a negative pressure cavity.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1:

the drainage tube shown in fig. 1 to 7 for preventing surrounding tissues from being damaged during extraction comprises a tube body 1, a negative pressure cavity 4 and a drainage hole 3 in the tube body 1, wherein the drainage hole 3 consists of a convex part 30 and a wall surface 32, an opening 31 for allowing cleaning liquid to enter and exit is formed between the convex part 30 and the convex part 30, and the inner end of the convex part 30 is a guide surface 33.

Before operation, the drainage tube is required to extend into human intestinal canal for cleaning the pus in human intestinal canal, and then discharging the pus in intestinal canal. The drainage tube needs to be placed in human intestinal canal for a long time, and the placement time is generally: and more than or equal to 12 hours, tissues in the intestinal tract are in a continuously breeding state, surrounding tissues can be bred into the tube body 1 along the drainage holes 3 formed in the periphery of the drainage tube, mushroom-shaped surrounding tissue parts bred in the tube body 1 can form mushrooms, the inner openings 31 of the drainage holes 3 are plugged by the mushroom-shaped surrounding tissues, the drainage tube is difficult to pull out when pulled out, and even the surrounding tissues are pulled out, so that intestinal tract bleeding is caused.

As shown in fig. 6, surrounding tissue grows inside the drainage hole 3 of the tube body 1, the drainage tube is gradually pulled out with a certain force outwards, the surrounding tissue relatively moves towards the outside of the tube body 1 along the guide surface 33 in the drainage hole 3, the guide surface 33 is in a cambered surface shape, the two sides of the guide surface 33 are higher than the middle, the middle of the guide surface 33 is inwards sunken, when the surrounding tissue relatively moves on the guide surface 33, the guide surface 33 covers the surrounding tissue, the surrounding tissue is supported to prevent the surrounding tissue from separating from the guide surface 33 or being blocked at the edge when relatively moving, the guiding effect is achieved, the surrounding tissue can be enabled to move smoothly, in addition, when the shape of the drainage hole 3 is cylindrical or conical, the inner caliber of the drainage hole 3 is smaller than the outer caliber of the drainage hole, the surrounding tissue which grows into the tube body 1 is adhered on the inner wall of the tube body 1, the mushroom-shaped surrounding tissue is formed to block the inner opening 31 of the drainage hole 3, and when the surrounding tissue is pulled outwards, when the surrounding tissue is pulled out, the mushroom-shaped surrounding tissue is blocked at the inner opening 31 of the drainage tube 3, and is difficult to fall off or even is broken to trigger; in the invention, the guide surface 33 is obliquely arranged from the inner side of the convex part 30 to the outer side towards the middle of the drainage hole 3, the caliber of the inner side of the opening 31 is larger than that of the outer side of the opening, when surrounding tissues are adhered on the inner wall of the pipe body 1, the mushroom-shaped surrounding tissues relatively move smoothly under the action of the large-diameter inner side opening 31, the guide surface 33 and the inner wall of the pipe body 1 are provided with rounding for smooth transition, and when the surrounding tissues relatively move along the smooth guide surface 33, friction is reduced, resistance is small, the movement of the surrounding tissues is rapid and smooth, and the surrounding tissues can be protected from being scratched.

As shown in fig. 3, the protruding portion 30 is thin-walled sheet-shaped, and the protruding portion 30 and the tube body 1 are integrally formed when the surrounding tissue relatively moves to the opening 31 at the outer side of the drainage hole 3, so that a certain elastic restoring capability is provided, the strength of the thin-walled sheet-shaped protruding portion 30 is low, the surrounding tissue can easily push the protruding portion 30 away, the protruding portion 30 gradually turns outwards, the opening 31 at the outer side of the drainage hole 3 gradually becomes larger, the surrounding tissue relatively moves to the outer side of the tube body 1 so as to smoothly fall off, and when the surrounding tissue completely breaks away from the tube body 1, the protruding portion 30 slowly recovers under the elastic restoring capability.

Meanwhile, the aperture formed in the middle of the convex part is smaller, so that the size of the formed granulation tissue in the width direction of the hole is smaller, the granulation tissue is in a rod shape, and the resistance is smaller when the drainage tube is pulled out (if the formed granulation tissue is in the shape of a mushroom, the current shape is similar to that of flammulina velutipes).

Example 2:

in this example, the example 1 was used as a base, and the diameter of the inward recess in the middle of the convex portion 30 was increased to thin the thickness of the convex portion 30 having the arc shape based on the example 1.

As shown in fig. 7, an opening 31 for the cleaning liquid to go in and out is formed between adjacent convex portions 30, and a wall surface 32 forming a drainage hole 3 is formed between the adjacent convex portions 30 and the bottom connected with the pipe body 1, a guiding surface 33 is obliquely arranged from the inner side to the outer side of the convex portions 30 toward the middle of the drainage hole 3, the caliber of the inner side of the opening 31 is larger than that of the outer side, the guiding surface 33 is in a cambered surface shape, two sides of the guiding surface 33 are higher than the middle, the middle of the guiding surface 33 is recessed inwards, and the ratio of the diameter of the middle recess of the convex portions 30 to the diameter of the middle recess of the convex portions 30 in the embodiment 1 is 3:1.

in this way, the diameter of the inward concave part in the middle of the convex part 30 is increased, and the thickness of the convex part 30 in the arc shape is set, so that when surrounding tissues relatively move to the opening 31 at the outer side of the drainage hole 3, the convex part 30 can be pushed away by only a small force to easily pass through, the resistance is reduced, and the falling-off process of the surrounding tissues becomes simpler and easier; and the peripheral tissue with larger partial size can be dealt with, so that the peripheral tissue can be smoothly fallen off.

The foregoing description of the preferred embodiment of the invention will so fully reveal the true scope of the invention that others skilled in the art can, by applying to it, readily modify and adapt for various usages such specific embodiments without departing from the true spirit and scope of the invention.

Claims

1. The drainage tube for preventing surrounding tissues from being damaged during pulling out comprises a tube body (1), wherein a plurality of drainage holes (3) distributed in a surrounding manner are formed in the side wall of the tube body (1), and a negative pressure cavity (4) is formed in the interior of the tube body (1); the method is characterized in that: a plurality of convex parts (30) protruding towards the middle of the drainage hole (3) are arranged in the drainage hole (3), the convex parts (30) are circumferentially distributed along the drainage hole (3), openings (31) for the cleaning liquid to enter and exit are formed by surrounding the convex parts (30), a wall surface (32) forming the drainage hole (3) is formed between the adjacent convex parts (30) and the bottom connected with the pipe body (1), one surface of the convex parts (30) facing the negative pressure cavity (4) is a guide surface (33) for facilitating the smooth falling of surrounding tissues, the guide surface (33) is obliquely arranged from the inner side to the outer side of the convex parts (30) towards the middle of the drainage hole (3), and the caliber of the inner side of the opening (31) is larger than that of the outer side of the opening; the convex part (30) is thin-walled sheet-shaped, and the convex part (30) and the pipe body (1) are of an integral structure; the convex part (30) is round, elliptic or curved.

2. The drainage tube for preventing damage to surrounding tissue upon extraction of claim 1, wherein: the guide surface (33) is in a cambered surface shape, two sides of the guide surface (33) are higher than the middle, and the middle of the guide surface (33) is recessed inwards.

3. The drainage tube for preventing damage to surrounding tissue upon extraction of claim 2, wherein: the surface of the guide surface (33) is smooth, and the guide surface (33) and the inner wall of the pipe body (1) are provided with rounding for smooth transition.

4. The drainage tube for preventing damage to surrounding tissue upon extraction of claim 1, wherein: the surface of the convex part (30) positioned on the outer side of the pipe body (1) is the same surface as the surface of the pipe body (1), and the outer side surface of the convex part (30) is flush with the curved surface direction of the surface of the pipe body (1).