JPH1052497A - Medical tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical tube without fracture of a contrasting line caused by suture fixing, pulling, bending, etc., on a patient's body wall, having excellent flexibility, cuttable, and to avoid an injury of a body organ caused by a cut face, by embedding string-like contrasting thread as a contrasting line in the longitudinal direction of a flexible tube substrate with a lumen. SOLUTION: A contrasting line 2 constituted of a string-like contrasting thread is embedded in the longitudinal direction in a flexible tube substrate 1 with an lumen 3 to be a flow path. The contrasting thread is embedded in a plurality as it is, a twisted plurality, or a thread net of a plurality knitted into a net. Thus, even if the tube dwelt in a body is sutured and fixed on the body wall of a patient or bent, the contrasting line 2 dose not break or tear. Further, even if the contrasting line is intentionally cut, the cut face does not injure an organ in the patient's body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Medical tubing is widely used as a surgical medical tool for catheters for testing and treatment for injecting a drug solution and for drain tubes for discharging blood and body fluids. Products with a cross-sectional structure, contrast and shape are commercially available. For example, with respect to imparting contrast, a conventional medical tube is a barium sulfate, tungsten, bismuth or other contrasting powder is mixed into the tube base material, or a resin in which the powder is embedded,
The tube is formed in a line shape in the tube longitudinal direction on the tube surface and the tube wall. The problem with using these tubes is that the contrast tube and the contrast line break,
Because the strength of tearing is weaker and more fragile than the tube base material itself, if the tube or the part where the tube is sutured and fixed to the patient's body wall or the tube is pulled or bent, especially when the contrast line is cut and teared, The tube was easy to cut and not only did not work, but also had the risk of being cut off inside the body.

As a countermeasure against these problems, a device has been devised in which a contrast agent is buried in the tube tube wall in a line in the longitudinal direction of the tube (for example, in Japanese Patent Laid-Open Publication No. Embedded in a line). This is because the contrast agent is embedded in the lumen, so that the contrast line is not peeled off from the tube base material, as compared with the tube in which the contrast line is formed in the tube surface and the tube wall in the tube longitudinal direction. In addition, even if the contrast line is slightly cracked by the tensile force, the tube base material surrounds the tube line, and the tube base material is hard to be cut. Therefore, there is an advantage that the tube strength is increased, but the contrast agent itself is made of barium sulfate or tungsten. Since the base material is made of a powder such as bismuth or the like, the portion has no strength, and when an external force such as tension or bending is applied, the portion is liable to be cut or torn, and has a drawback of being brittle.

In addition, a technique has been devised in which a metal wire is used instead of a contrast agent inside the tube and embedded in the longitudinal direction of the tube (for example, in Japanese Patent Application Laid-Open No. 6-154334, a straight line is formed in the longitudinal direction of the synthetic resin hollow tube). Embedded metal wires, such as piano wires and stainless steel wires). This is because, compared to the former tube, the contrast line is a metal wire, so its strength is strong and the contrast line does not break or tear, but the rigidity increases and the flexibility of the tube itself due to the metal wire There was a risk of damage to the organs and pressure on the organs. In addition, it is not only difficult to cut the tube by intentional means, but if it is cut, there is a risk that the cut surface shape is sharp or the metal wire itself comes out from the cut surface and damages internal organs etc. There were drawbacks.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such disadvantages of the conventional medical tubing,
The purpose of this is, of course, that the tube has contrasting properties.For example, even if the tube is placed in the body and the tube is sutured and fixed to the patient's body wall, pulled, or bent, the contrast line is torn. Medical that does not cut or cut, does not deteriorate the strength of the tube, does not impair the flexibility of the tube itself, can cut the tube by intentional means, and even if cut, the cut surface does not damage internal organs etc. To provide a tube for use.

[0006]

That is, the present invention relates to a method for forming a line-shaped contrast line on a flexible tube having a lumen serving as a flow passage penetrating in a longitudinal direction, as a contrast line in the longitudinal direction of the tube. A medical tube characterized by being embedded with a thread, wherein a plurality of contrast threads are twisted or twisted, or have a shape knitted in a plurality of meshes. It is a medical tube characterized by the following.

[0007]

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 tube according to the present invention, FIG. 2 is a perspective view showing one embodiment of only a tube contrast line, and FIG. FIG. 2B is a diagram in which the contrast yarn is knitted in a mesh shape.

In the tube of the present invention, a flexible tube base (1) having a lumen (3) serving as a flow passage and a contrast line (2) are buried in the longitudinal direction of the tube base (1). The contrast line (2) is formed of a thread-like contrast yarn (4).

The tube substrate (1) has a lumen (3) which is a flow passage penetrating in the length direction, and has a wall thickness of 0.1.
It is a tubular body having a length of about 50 to 2000 mm and a cross-sectional shape is not particularly limited, but folds may be provided on the inner and outer surfaces. As the material, it is preferable to select a flexible material such as silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene, polyamide, polyester, and fluororesin, but it is not necessarily limited to such a material. Among these, silicone rubber is useful as a medical tube that requires biocompatibility and flexibility, but because the tube thickness is particularly low in tensile strength, it is necessary to take measures to increase the tensile strength.

The contrast line (2) is a tube base (1)
A plurality, preferably 1 to 5 pieces are buried in the longitudinal direction or partly or in a line shape, and the outer diameter is 0.0
A thread-shaped contrast yarn (4) having a diameter of 1 to 2.9 mm is embedded alone as it is, or a plurality of twisted portions are twisted to form a twisted portion (5) having an outer diameter of 0.02 to 2.9 mm. )
Is formed and embedded, or a plurality of contrast yarns are knitted in a mesh form to form a net yarn having a width of 0.1 to 2.9 mm and embedded. Further, the contrast line (2) may form a twisted or knitted yarn or a twisted or knitted shape of a plurality of knitted yarns. As the material of the contrast yarn (4), barium sulfate, based on polypropylene, polyethylene, polyvinyl chloride, polyamide, polyester, fluororesin, etc.
Bismuth subcarbonate, bismuth oxide, tungsten, tungsten carbide, zirconium oxide, tantalum, gold,
It is preferable to select a material mixed with an X-ray opaque substance such as platinum or silver, but it is not necessary to limit the material to such a material.

It is important to select a material which has contrast and flexibility, and which can be easily cut and not torn by an external force such as tension or bending and which can be cut by intentional means. Also,
Even when embedded in the tube base material (1), the flexibility of the tube base material (1) itself is not impaired, and it is cut by intentional means against external forces such as pulling and bending without particularly deteriorating the strength. It is important that the cut surface does not damage internal organs or the like even if it is cut and cut. As the shape of the contrast yarn (4), a cylindrical base material is embedded with an X-ray opaque substance containing the base material and the like in the cylinder. It is preferable to apply X-ray opaque substance containing
Each may be combined, and this is not a limitation.

[0012]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these examples. [Example] 1 of a 2-lumen tube made of silicone rubber
In a lumen (longitudinal direction of the tube), a contrast yarn in which 30% barium sulfate mixed with a polyethylene base material is embedded in a cylindrical ultra-high-density polyethylene fiber having an outer diameter of 1 mm.
This was inserted, and the area around it was embedded with silicone rubber to form a contrast line. The tensile strength of one contrast yarn is 10
Table 1 shows the tensile strength of the tube weighing 0 kg or more and having the contrast yarn embedded therein.

[0013]

[Table 1]

Comparative Example Table 2 shows the tensile strength of a silicone rubber 2-lumen tube.

[0015]

[Table 2]

[0016] By embedding the shadow yarn made of ultra-high-density polyethylene fiber having a high tensile strength into the silicone rubber tube, it is possible to maintain a tensile strength three times or more that of the conventional art. In addition, unlike the case where a metal wire or the like is embedded in the tube base material, the present embodiment hardly increases rigidity, lowers flexibility and increases bending strength, increases tensile strength, and cuts the internal organs and the like. It functions as a tube that does not damage the organ and does not easily cause pressure on the organ.

[0017]

As described above, when the medical tube according to the present invention is used, not only the contrast is enhanced, but also the tube is placed in the body, and the tube is sutured and fixed to the patient's body wall, pulled or bent. In this case, the contrast line is not cut or torn, there is no deterioration in the strength of the tube, and the flexibility of the tube itself is not impaired.The tube can be cut by intentional means. It is extremely useful because it functions as a tube that does not damage the organs and hardly causes pressure on the organ.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing one embodiment of only a tube contrast line according to the present invention.

[Explanation of symbols]

 1. Tube base material 2. 2. Imaging line Tube lumen 4. Contrast thread 5. Contrast thread twisting part

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[Procedure amendment]

[Submission date] September 19, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011] It has contrasting and flexible properties, such as tension and bending.
Easy to cut, no tears, and intentional measures against external forces
It is important to select a material that can be cut by the method. Also,
Even when embedded in the tube substrate (1), the tube
The base material (1) does not lose its flexibility, and is pulled and bent.
Even with external force such as
Can be cut, and even if cut, the cut surface will damage internal organs, etc.
It is important not to turn it on. As the shape of the contrast yarn (4)
Is In the case of a cylindrical base material, the base material etc.
X-ray opaque material is embedded, Surface of rod-shaped substrate
Coated with an X-ray opaque substance including a base material, Base
Although a shape in which a material and an X-ray opaque substance are mixed is preferable,
You may combine each, and this is not a limit
No.

Claims (2)

[Claims] 1. A flexible tube having a lumen serving as a flow passage penetrating in a longitudinal direction, and a thread-like contrast yarn is buried as a contrast line in a longitudinal direction of the tube. And medical tubing. 2. The medical tube according to claim 1, wherein the contrast yarn has a shape twisted by a plurality of wires or a shape knitted into a plurality of meshes.