JPH08206219A - Drain tube for medical treatment - Google Patents

Abstract

PURPOSE: To maintain a wide internal cavity, to eliminate clogging and to make a drain tube after heeling easily removable and without giving pains to a patient at the time of removing the drain tube by providing an in-vivo indwelling part with grooves in the longitudinal direction of the outside surface of its tube and providing the respective grooves with side holes. CONSTITUTION: The drain tube 1 is composed of an exo-indwelling part 13 which consists of a straight tube and an in-vivo indwelling part 11 which is connected to its front end and acts as a liquid collecting part to collect the body fluid. The in-vivo indwelling part 11 is nearly equal to the straight tube of the exo-indwelling part 13 in its outside diameter and is provided with plural pieces of the grooves 2 in the longitudinal direction of its outside surface. The respective grooves 2 are provided with one or plural pieces of the side holes 3 communicating with the inside cavity 4. While the ambient tissues of the body slightly intrude into the parts of the grooves 2 when the drain tube 1 is made to indwell in the body, the space is remained, the discharge liquid, such as body fluid, flows through the grooves 2 into the inside cavity 4 from the side holes 3 and flow outside the body through the inside cavity of the exo-indwelling part 13 together with the discharge liquid from the front end of the tube.

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 and body fluid exuding from a wound after surgery.

[0002]

2. Description of the Related Art Drain tubes are often used as surgical medical tools for draining body fluids, and products having various inner and outer diameters and sectional structures or shapes are commercially available. A conventional drain tube has a structure in which body fluid flows into and out of the tube from the tip of the tube when it is inserted into a body fluid storage site, or from the tip and side holes of the tube when the tube has side holes. It has become. The problem with using these tubes is that when the patient's wound heals, body tissue grows into the side hole of the tube, blocking the side hole and not only removing the tube during removal. The result is tearing of the tissue, which causes great pain to the patient.

As a countermeasure against these problems, a method has been proposed in which a plurality of grooves are provided on the outer side of the tube and the body fluid is discharged by the grooves (for example, Japanese Patent Publication No. 2-17185). As shown in FIG. 4, a circular straight tube is used for the part (23) that is exposed outside the body during the indwelling, and a groove as described above is provided for the part (21) that is left inside the body. Has become. Therefore, since only the groove is provided on the outer surface in the longitudinal direction of the tube, it can be removed without pain after healing of the wound of the patient. However, the cross-sectional shape of the present tube is such that the transition part (2) from the indwelling part (21) to the indwelling part (23) outside the body.
Since the lumen of 2) is a collection of extremely small cavities as shown in Fig. 4 (c), clogging due to tissue clots or blood clots often occurs at this part, and drainage of body fluid, which is the original purpose of the drain tube, occurs. Sometimes couldn't be done.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such drawbacks and the current situation of the conventional drain tube, and the purpose thereof is to keep a wide lumen, to prevent clogging, and It is an object of the present invention to provide a drain tube that can be easily removed without causing pain to the patient when removing the drain tube after healing.

[0005]

Means for Solving the Problems That is, the present invention relates to a drain tube comprising an extracorporeal indwelling part composed of a straight tube and an indwelling part in the body which is connected to a distal end portion thereof and serves as a liquid collecting part. The indwelling part is provided with a plurality of grooves in the longitudinal direction of the outer surface of the tube, and each groove is provided with one or a plurality of side holes. Furthermore, the groove of the indwelling part in the body has a width. It is 0.5-3 mm, and a depth is 30-70% of the wall thickness of the tube which comprises an indwelling part in a body, It is a medical drain tube characterized by the above-mentioned.

The drain tube of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a drain tube according to the present invention, FIG. 2 is a cross-sectional view showing a state of fluid discharge during indwelling in a body, and FIG. 3 is a cross-sectional view showing a state of surrounding body tissue at the time of indwelling in a body. It is a figure.

The drain tube (1) of the present invention is composed of an extracorporeal indwelling part (13) made of a straight tube and an indwelling part (11) in the body which is connected to the distal end part thereof to collect a body fluid. There is. The indwelling part (11) is
The outer diameter is equal to the straight tube of the extracorporeal indwelling part (13), a plurality of grooves (2) are provided on the outer surface in the longitudinal direction, and each groove has a side hole (3) communicating with the inner cavity (4). One or more are provided.

The depth of the groove (2) is such that when it is placed in the body,
As shown in FIG. 3, it is difficult to reach the bottom of the groove or the side hole (3) by the surrounding body tissue (6), and the strength of the tube is balanced with the strength of the tube. The thickness is preferably in the range of 30 to 70%, preferably 40 to 60%, and the width is preferably in the range of 0.5 to 3 mm so that the discharged liquid is less likely to be clogged and is easily transmitted.

The side hole (3) may have a circular shape, an elliptical shape or an oval shape. In this case, the side hole (3) is provided so that the major axis thereof is in the same direction as the groove (2). Has been. The side hole (3) communicates with the lumen (4) of the tube, and the lumen (4) communicates with the indwelling part (11) from the indwelling part (13) of the body to form the drain tube (1) of the present invention. It penetrates the whole.

The material of the drain tube (1) according to the present invention may be soft vinyl chloride resin, silicone rubber or the like which is generally used for medical purposes and is not particularly limited. The tube may have an oval shape or an oval shape in addition to a circular cross-sectional shape.
1) and the extracorporeal indwelling part (13) may be separately molded, bonded and assembled. However, if they are integrally molded, the step at the connection part can be eliminated on both the inner and outer surfaces, and the cost is reduced. Is also advantageous.

Further, the drain tube (1) is provided with a contrast line made of an X-ray opaque material, or a connector for connecting to an aspirator or the like at the end of the extracorporeal indwelling part (13) depending on the purpose of use. It may be provided or a detachable needle for puncturing the body may be attached.

Next, the state when the drain tube (1) of the present invention is left inside the body will be described. As shown in FIG. 3, the surrounding body tissue (6) slightly penetrates into the groove (2), but there is still a space, and as shown in FIG. Thus, it flows along the groove (2) into the inner cavity (4) through the side hole (3), and flows out of the body through the inner cavity of the extracorporeal indwelling part (13) together with the discharged liquid that has entered from the tip of the tube.

[0013]

As described above, when the drain tube according to the present invention is used, since the lumen is widely maintained, there is no clogging due to tissue clots, blood clots, etc., and the body tissue becomes a tube when the patient is healed. Since it does not enter the side hole, the tube can be easily removed without burdening the patient. Therefore, it is extremely useful as a safe and reliable drain tube.

[Brief description of drawings]

FIG. 1A is a perspective view showing a drain tube according to an embodiment of the present invention, and FIG. 1B is a sectional view taken along the line AA ′ in FIG.

FIG. 2 is a cross-sectional view showing the flow of discharged liquid when the drain tube of the present invention is placed in the body.

FIG. 3 is a cross-sectional view showing a state of surrounding body tissue when the drain tube of the present invention is placed in a body.

FIG. 4 is a view showing the structure of a conventional drain tube,
(A) is a side view, (b)-(d) is sectional drawing of an indwelling part in a body, a transition part, and an indwelling part outside a body, respectively.

[Explanation of symbols]

 1 Drain Tube 2, 24 Groove 3 Side Hole 4 Lumen 6 Body Tissue 11, 21 Body Indwelling Part 13, 23 Extracorporeal Indwelling Part 22 Transition Section

Claims (3)

[Claims] 1. A drain tube comprising an in-vivo indwelling part made of a straight tube and an in-vivo indwelling part connected to a distal end of the in-vivo indwelling part, the indwelling part having a length of an outer surface of the tube. A medical drain tube characterized in that a plurality of grooves are provided in the direction, and each groove is provided with one or a plurality of side holes. 2. The groove of the indwelling part in the body has a width of 0.5 to 3 mm.
And the depth is 30 which is the wall thickness of the tube that constitutes the indwelling part in the body.
The range is from 70% to 70%.
The medical drain tube described. 3. The side hole has an elliptical shape or an oval shape, and is provided so that its major axis is in the same direction as the groove, and the side hole is provided. Medical drain tube.