JPH10234848A - Medical drain tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the connection of a bag or the like by arranging a thin drain tube with a ratio of the minimum thickness to the maximum outer diameter in a range of a specified value and a thick straight tube connected to the rear end part thereof to achieve a smooth flow of a drain and a prevention of infection. SOLUTION: A straight tube 3 thicker than a drain tube 2 is connected to the rear end part of the thin drain tube 2 with the ratio T/R of 1/70-1/8 between the minimum thickness T and the maximum outer diameter R to form a medical drain tube. The thickness of the thin drain tube 2 is about 0.2-about 1.2mm. Such a dimensional relationship is established to allow holding of the strength of the tube even when the thickness of the drain tube 2 is made less. A threaded groove 5 with a triangular cross section can be set in the longitudinal direction thereof on the internal surface of the tube 2. With such an arrangement, blood or the like is smoothly discharged to the side of the straight tube 3 by capillary phenomenon thereby enabling preventing of the complete closure of a passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain tube for draining blood or body fluid exuding from a wound after surgery.

[0002]

2. Description of the Related Art Medical drain tubes are already widely used for discharging body fluids as surgical medical tools, and products having various inner and outer diameters, cross-sectional structures and shapes are commercially available. The conventional drain tube is a tube having a hardness that is not obstructed by surrounding tissue as shown in FIG. 4A, and efficiently exhibits drainage efficiency when the lumen is completely open. It was to do.

[0003] However, since the drain tube has a certain degree of hardness, parts around the organ and near the blood vessel and the like,
At the time of placement, there is a risk of damaging organs and blood vessels at the tip of the drain tube, and after placement, there is a drawback that compression damage is caused by the hardness of the drain tube. As a solution to the disadvantage, there is a penrose drain tube as shown in FIG. Because the Penrose drain tube is thin, the tube collapses even when it is placed around organs and near blood vessels.
It is a drain tube with less perforation and less pressure on tissue.

The cross-sectional structure of the tube is such that the inner surface of the tube is formed into a special shape and the discharged liquid is allowed to pass out of the body by utilizing the capillary phenomenon.
No. 19911, No. 53-54394,
A drain tube as disclosed in Japanese Utility Model Laid-Open Publication No. 57-29 has been invented, and is usually used by being sutured and fixed on the abdominal wall. However, when the drain tube is sutured and fixed on the abdominal wall, not only is it difficult to fix the suture because the tube is crushed, but also when the suture is fixed, the drain tube is easily torn, and the tube is torn off and falls into the body. Not only do not fulfill the purpose, but also have the drawback that when they fall into the body, an operation such as removal by a doctor is added, which is very troublesome.

Further, since the rear end of the tube is usually covered with gauze or the like and used as a natural drainage, there is a possibility of air circulation from outside the body to the inside of the body, and not only there is a risk of infection but also suction. There is a drawback that drainage due to is not possible. On the other hand, the lumen is not collapsed by the suction operation and the suturing fixation, drainage is generated by capillary action, and the rear end of the tube is provided with a connector capable of connecting a bag for suction, storage and prevention of infection.
A drain tube as shown in (3) (for example, Japanese Utility Model Laid-Open No. Hei 7-13345) has been proposed. These drain tubes eliminate the drawbacks of the Penrose drain tube, but because the hardness is such that the tube is not crushed by the compression of the surrounding tissue, the area around the organ and near the blood vessels, etc. There is a possibility that the blood vessel may be damaged, and even after the indwelling, the pressure may be damaged due to the hardness of the drain tube.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in a conventional medical tube. When placing a drain tube in a sensitive area nearby, do not damage organs and blood vessels at the distal end of the drain tube.After placement, the pus, blood that comes out of the living body without compressive damage due to the hardness of the drain tube Can be constantly drained to the outside, and even if the drain tube is sutured and fixed to the abdominal wall, the lumen does not collapse, drainage flows smoothly, and the drain tube rear end is drained. An object of the present invention is to provide a drain tube that can easily connect a bag or the like that can prevent infection by sucking, storing, and connecting a liquid to the drain tube.

[0007]

That is, according to the present invention, the ratio of the minimum thickness (T) to the maximum outer diameter (R) is T / R = 1 / 70-1.
/ 8 tube and a tube having a thin wall drain tube and a tubular straight tube thicker than the drain tube adjacent to the rear end of the drain tube, or a minimum wall thickness (T) and a maximum outer diameter (R). T / R = 1/7
A tubular thin tube having a thickness of 0 to 1/8 and a tubular straight tube having a plurality of longitudinal grooves on its inner surface are adjacent to the rear end of the drain tube. A medical drain tube with adjacent connectors.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view showing one embodiment of a medical drain tube according to the present invention, and FIG.
(B) is a longitudinal sectional view of (a), and (c) is a transverse sectional view of a thin drain tube of the tube. FIG. 2 is an external view, a longitudinal sectional view, and a lateral sectional view showing another embodiment according to the present invention. FIG. 3 is a schematic view showing a use state of the medical drain tube of FIG. 1 according to the present invention. FIG. 4 is an external view of a conventional medical drain tube and a cross-sectional view in a lateral direction.

The medical drain tube of the present invention (1)
Is that the ratio of the minimum thickness (T) to the maximum outer diameter (R) is T / R =
A 1/70 to 1/8 tubular thin drain tube (2) and a tubular straight tube (3) thicker than the drain tube (2) are adjacent to the rear end of the drain tube (2). A tube or a thin walled drain tube (2) having a ratio of a minimum thickness (T) to a maximum outer diameter (R) of the drain tube being T / R = 1/70 to 1/8, and the drain tube; (3) The medical drain tube (1), wherein a tubular straight tube (3) is adjacent to the rear end.

The thin drain tube (2) has a thickness of about 0.2 to 1.0 mm, and the ratio of the minimum thickness (T) to the maximum outer diameter (R) is T / R = 1/70 to It has a 1/8 tubular shape. When T / R is greater than 1/8, the tube (2) has a large wall thickness. Therefore, when the drain tube (1) is placed in a patient after the operation, organs and blood vessels are placed at the tip of the thin drain tube (2). Damage or during detention,
The tube (2) may compress and damage organs and blood vessels. If T / R is less than 1/70, the thickness of the tube (2) is too thin to maintain the strength of the tube, and it cannot function as a drain tube. The cross-sectional shape is not particularly limited. For example, as shown in FIG. 1 (c), several grooves (5) having a triangular cross section are formed on the inner surface of the tube (2) in the longitudinal direction of the tube (2). May be provided.

As shown in FIGS. 1 (c), 2 (1) (c), and 2 (2) (c), the shape may be elliptical or square in addition to a circle. The distal end portion of the medical drain tube (1), that is, the thin drain tube (2) does not accumulate biological fluids such as pus, blood, and the like that exit inside the living body.
It suffices if it can be constantly discharged to the straight tube (3) side by the capillary phenomenon. Another object is to secure the minimum flow path and prevent complete blockage of the flow path due to the presence of the groove (5).

The material of the thin drain tube (2) is preferably a material having moderate flexibility such as soft vinyl chloride resin, polyurethane resin, silicone rubber and natural rubber, which is generally used for medical use. However, it is not always necessary to limit to such a material. The total length is preferably 30 to 300 mm, which is based on the condition that all the thin drain tubes (2) that are gentle to tissues that do not damage organs and blood vessels are used in the body.
If the length is shorter than this range, the indwelling length is insufficient, and if the length is longer, the thin drain tube (2) comes out of the body and does not initially fulfill its purpose, so the length in the above range is considered appropriate.

Further, in order to increase the drainage efficiency of the thin drain tube (2), if the tensile strength and tear strength of the drain can withstand normal use, a side hole ( 6) may be opened at several places. In addition, an X-ray photograph is taken of the place where the drain tube being placed is placed, so that the X-ray can be easily understood.
The line contrast section (7) may be provided with a contrast property in the entire length direction of the tube (2) or the entire tube (2).

The straight tube (3) has one large lumen, is adjacent to the rear end of the thin drain tube (2), and is used as a tube connecting the inside and outside of the body. The wall thickness is thicker than the thin drain tube (2), so that the wall thickness does not lower the drainage efficiency, and the lumen does not collapse even when normal suction is applied or when the suture is fixed with the abdominal wall. About 1-3 mm is preferable. Although the shape of the cross-sectional structure is not particularly limited, the groove (5) is
Several tubes may be provided on the inner surface in the longitudinal direction of the tube (3). The groove (5), like the thin drain tube (2), flows the drainage flowing through the thin drain tube (2) by capillary action as it is, flows through the straight tube (3) by capillary action, and leaves the body as it is. Useful for pouring out.

However, in the case where the groove (5) is provided, the straight tube (2) is used for sucking and storing the drainage at the rear end and for preventing infection because the straight tube (2) has a sectional structure as it is. Since it cannot be connected to the back (14), the connector (4) is always adjacent to the rear end of the straight tube (3) in order to connect to the back (14). Even when the straight tube (3) has no groove (5), the drainage is connected to the bag (14).
Due to the suction from 4), the drainage flowing from the thin drain tube (2) without problems flows through the straight tube (3) and the connector (4) to the bag (14), and is stored without fear of infection. Is done.

In this case, if the straight tube (3) has a circular cross section and can be connected to the bag while maintaining airtightness, the straight tube (3) functions as a connector, and the straight tube (3) serves as a connector. ) The connector (4) may not be provided at the rear end. Furthermore, in this case, the straight tube (3) has the same circular shape regardless of the cross section at any portion outside the body, and the length of the tube outside the body is preferably as short as possible. With consideration, it is possible to cut the straight tube (3) to any length and use it as a tube serving as a connector.

The material of the straight tube (3) is preferably a material having moderate flexibility such as soft vinyl chloride resin, polyurethane resin, silicone rubber and natural rubber, which is generally used for medical use. It is not always necessary to limit to such a material. It is important that the tube can be adjacent to the thin drain tube (2), does not collapse when the suture is fixed to the abdominal wall, and the lumen can be maintained.

The material of the connector (4) is preferably a material having moderate flexibility such as soft vinyl chloride resin, polyurethane resin, silicone rubber, and natural rubber, which is generally used for medical use, but is not necessarily required. It is not necessary to limit to such a material. It is important that it can be adjacent to the straight tube (3). Also, as shown in FIG. 2 so as not to come off easily after connecting with the back (14).
(2) As shown in (a), the connector (4) may be provided with several grooves in the cross-sectional direction or a taper on the inner surface of the connector (14).

The thin drain tube (2) and the straight tube (3) of the medical drain tube (1) are not only adjacent and joined by bonding or the like, but also have no steps on the outer surface, and have a smooth inner shape and flesh. The thickness may be changed to be continuously and integrally formed. This is because there is no step between the thin drain tube (2) and the straight tube (3) for placing the medical drain tube (1).
It can be smoothly inserted and placed in the body without being caught by the abdominal wall (9), and has many advantages.

Next, although there is no particular method for using the medical drain tube (1) of the present invention, an example will be described on the assumption that the medical drain tube (1) shown in FIG. 1 is used. After the laparotomy and the operation performed under the endoscope, the distal end of the tube, that is, the thin drain tube (2) is inserted into the body (10) through an incision in the abdominal wall. The tip of the thin drain tube (2) is guided to the place where the drain tube is to be placed, such as the lower part of the organ, with forceps or the like. At this time, the straight tube (3) may be located at a position connecting the inside of the body (10) and the outside of the body (11), that is, at a position where the straight tube (3) can be sutured and fixed with the abdominal wall (9). If not, cut off the tip of the thin drain tube (2) and adjust the length. After placing the thin drain tube (2), the straight tube (3) is sutured and fixed to the abdominal wall (9), and the connector (4) at the rear end is fixed.
And the tube connected to the back (14). Then, suction pressure is applied to the back (14) as occasion demands, and drainage is performed.

[0021]

As described above, when the medical drain tube (1) according to the present invention is used, organs and blood vessels are not damaged at the distal end of the drain tube. Biological fluids such as pus and blood that flow inside can be constantly drained to the outside,
In addition, even if the drain tube is sutured and fixed to the abdominal wall, the lumen does not collapse and the drainage flows smoothly.Furthermore, the rear end of the drain tube sucks and stores the drainage and prevents infection by connecting to the drain tube. It is extremely useful as a drain tube that can easily connect a bag or the like that can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a medical drain tube according to the present invention, (a) is an external view, (b) is a longitudinal sectional view, and (c) is a lateral view of a thin drain tube. It is sectional drawing.

FIG. 2 shows another two of the medical drain tubes according to the present invention.
It is the schematic which shows the Example of a kind, (a) is an external view,
(B) is a longitudinal sectional view, and (c) is a lateral sectional view of the thin drain tube.

FIG. 3 is a schematic view showing a use state of the medical drain tube of FIG. 1 according to the present invention.

4A and 4B are schematic views of three types of conventional medical drain tubes, in which FIG. 4A is an external view, and FIG. 4B is a cross-sectional view (AA ′ cross-sectional view) of a main body tube in a lateral direction.

[Explanation of symbols]

 1. Medical drain tube 2. 2. Thin drain tube Straight tube 4. Connector 5. Streak 6. Side hole 7. X-ray imaging unit 8. Lumen 9. Abdominal wall 10. Inside the body 11. Extracorporeal 12. Liver 13. Suture part 14. back

Claims (2)

[Claims] 1. A tubular thin drain tube having a ratio of a minimum thickness (T) to a maximum outer diameter (R) of T / R = 1/70 to 1/8, and a drain at a rear end of the drain tube. A medical drain tube in which a tubular straight tube thicker than the tube is formed adjacent to the tube. 2. A tubular thin drain tube having a ratio of a minimum thickness (T) to a maximum outer diameter (R) of T / R = 1/70 to 1/8, and a tubular thin tube at a rear end of the drain tube. A medical drain tube in which a straight tube is adjacent and a connector is adjacent to a rear end of the straight tube.