JP3206853B2 - Drainage tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, in the case of introducing and placing a medical device such as a drain tube into a body cavity in an endoscopic surgical operation, it is percutaneously inserted into an abdominal wall or the like, and is passed through a trocar or the like placed there. Is inserted into the abdominal cavity or the like, and the distal end of the tube is guided to the indwelling site by grasping the distal end of the tube with forceps inserted from another trocar. However, when the drain tube is introduced into the body cavity in this manner, leakage of insufflation gas occurs from the trocar or the like for introducing the drain tube, which deteriorates the field of view of the laparoscope and makes it difficult to see the place where the drain tube is placed. There were drawbacks.

In order to guide the drain tube to the indwelling site, a method of directly inserting the drain tube from a trocar or the like has been adopted. However, since the drain tube is flexible, the drain tube can be directly moved to the indwelling site. number,
There is a drawback such as bending on the way, and a technique of guiding the drain tube with forceps inserted from another trocar is required.

[0004]

SUMMARY OF THE INVENTION The present invention has been made as a result of various studies in order to solve the above-mentioned problems in inserting and placing a drain tube in a body cavity. However, it is an object of the present invention to eliminate insufficiency insufficiency when a drain tube is inserted into a body cavity, and to easily place the drain tube at a target site under a good visual field.

[0005]

In order to achieve the above object, a drainage tube according to the present invention is provided with a flexible drain tube having a lumen which penetrates in a longitudinal direction and serves as a drainage flow passage. It consists of a straight or curved hard rigid sheath that can accommodate the drain tube.The drain tube is provided with a sealing portion at the tip to hermetically close the flow passage. It is characterized in that it is cut obliquely, a flange is provided near the rear end, and the rear end is airtightly closed.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a schematic diagram showing a configuration of a drainage tube according to the present invention, and FIG. 2 is a schematic diagram showing a use state thereof.

The drainage tube according to the present invention comprises a flexible drain tube (2) having a lumen serving as a drainage passage, and a rigid tubular sheath (1) having a lumen capable of accommodating the drain tube (2). ) And basically consists of The drain tube (1) is provided with a sealing portion (3) for hermetically closing the flow passage at the distal end or near the distal end, and is housed in the lumen of the sheath (1) as shown in FIG. I have. On the other hand, the distal end (5) of the sheath (1) is cut obliquely to the length direction, and a flange (4) is provided near the rear end, and the rear end is airtightly closed. .

[0008] The drain tube (2) has, for example, a uniform outer diameter over its entire length, is provided with a pleat on its inner surface, and has an elongated side hole at the rear end along the longitudinal direction. Use a flexible tube made of silicone rubber, polyurethane elastomer, soft vinyl chloride resin, etc. that can reliably drain liquid by capillary action, etc. even if the lumen is crushed due to bending etc. And
The tip is sealed (3) by means of adhesive, plug, etc.
Is provided. The sealing portion (3) has a shape that can be easily grasped with forceps or the like, for example, by crushing the end of the tube to have a thickness of 0.5.
It is preferable to finish it into a semicircular flat shape of about 3 mm.

The sheath (1) is a hard tubular body having an outer diameter dimension that can be inserted into the inner cavity of the trocar and having a thickness of about 0.1 to 1.0 mm. Relatively hard such as hard vinyl chloride resin, polypropylene resin, polyethylene resin and hard to bend,
It is preferable to select a material with good slip, but it is not always necessary to limit to such a material. It is important to select a material that is easy to guide to the indwelling site when it passes through the trocar and guides the drain tube (2) into the body cavity, and has good slippage.

It is important that the distal end portion (5) of the sheath (1) be shaped so that the distal end portion of the drain tube (2) housed in its lumen can be easily taken out. For example, as shown in FIG. 1, a shape cut obliquely from one side or two opposing sides in the length direction is preferable, but is not necessarily limited to this. A flange (4) is provided near the rear end of the sheath (1) to prevent the sheath from falling into the trocar when the sheath is inserted into the lumen of the trocar and operated. The collar (4) also functions as a grip when handling and operating the sheath (1). The rear end of the sheath (1) is air-tightly closed to prevent insufflation gas from leaking when inserted into the inner space of the trocar. The methods include filling the adhesive,
A method of integrally forming the rear end wall when forming the plug or the sheath is possible, but is not particularly limited. Instead of providing the sheath (1) with a flange, a stopper with a flange may be used.

Although the shape of the sheath (1) may be straight or linear as shown in FIG. 1, if the sheath (1) is curved as long as it can be inserted into the lumen of the trocar, the drain tube (2) can be formed. ) Is preferably performed because the operation for grasping the target with forceps inserted from another trocar or guiding the target to the target placement site becomes easier.

Next, a method of using the drainage tube according to the present invention will be described. First, as shown in FIG. 1, the drainage tube of the present invention, in which the drain tube (2) is housed in the lumen of the sheath (1), is passed through the body wall (7) of the patient as shown in FIG. And inserted into the lumen of the trocar (9) which has been inserted and placed in advance. Further, while confirming the position with an endoscope inserted from another trocar, the distal end of the sheath (1) is moved to a target position where the drain tube (2) is to be placed. Here, the forceps (6) inserted from another trocar (10) grasps the sealing portion (3) at the tip of the drain tube (2) housed in the lumen of the sheath (1) and the like. Pull it out of the sheath and use the trocar (1
Then, the distal end of the drain tube (2) together with the trocar (10) is pulled out of the body wall (7).

Further, after confirming that the rear end of the drain tube (2) has come out of the sheath (1) and has been guided to the target placement site, the sheath (1) and the trocars (9, 10). And leave only the drain tube (2). Finally, by cutting and removing the sealing portion (3) at the tip of the drain tube (2), the drainage from the wound is discharged through the lumen flow passage of the drain tube (2).

[0014]

When the drainage tube according to the present invention is used, the rear end of the sheath (1) is airtightly closed, so that when inserted into the body cavity (8) through the trocar (9), the airtightness in the body cavity is reduced. It is possible to guide the drain tube (2) to the target placement site while preventing leakage of insufflation gas, so that the field of view of the endoscope is not obstructed and the placement position of the drain tube is firmly confirmed. Can be.

When the drain tube (2) is guided to the indwelling site in the body cavity, the drain tube (2) is housed in the sheath (1) having appropriate hardness. Is moved to the place where the drain tube (2) is placed, whereby the drain tube (2) can be easily guided to the target placement site. Then, the drain tube (2) can be easily pulled out from the obliquely cut portion of the sheath (1) distal end portion (5) with forceps (6) or the like, and the drain tube (2) can be easily placed at the target site. can do.

[0016]

According to the drainage tube of the present invention, the drain tube can be inserted and detained in the body cavity while keeping the airtightness in the body cavity and the field of view of the endoscope. It can be easily guided to a target site and pulled out with forceps or the like, so that it can be easily placed. This is extremely useful as a drain tube for endoscopic surgery.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a configuration of a drainage tube according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a use state of the drainage tube according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath 2 Drain tube 3 Sealing part 4 Flange 5 Tip 6 Forceps 7 Body wall 8 Body cavity 9,10 Trocar

Claims (1)

(57) [Claims] 1. A flexible drain tube having a lumen penetrating in a longitudinal direction and serving as a drain passage, and a straight or curved hard tubular sheath capable of accommodating the drain tube, The drain tube is provided with a sealing portion at the distal end to hermetically close the flow passage, and the sheath cuts the distal end obliquely from one side or two opposing sides in the longitudinal direction, near the rear end A drainage tube, characterized in that a flange is provided and a rear end is closed airtightly.