JPH11262533A - Method of placing connector attached to medical tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical catheter tube with plural connectors, outside of which a guide tube whose inner diameter is larger than the outer diameter of the catheter tube can pass. SOLUTION: This medical tube 1 is a flexible tube having three lumens 5, 6 and 7 running through the tube as liquid flow pathways in the length direction. Three connectors 2 are attached at the rear end of the tube 1 by way of three branch tubes 3 with different length so that the branch tubes communicate with the lumens 5, 6 and 7. Positions of the connectors 2 are apart from each other in front and rear in the vertical line so that no connector 2 will lie on the top of another.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for arranging a connector attached to a rear end of a catheter or a tube (hereinafter, generally referred to as a tube) used for medical use.

[0002]

2. Description of the Related Art Tubes used for medical purposes are widely used as medical devices, such as catheters for inspection and treatment for injecting a drug solution and drain tubes for discharging blood and body fluids. Products with diameter, cross-sectional structure, contrast and shape are commercially available. Particularly recently, a tube having a plurality of lumens has been demanded for the purpose of discharging and washing blood and body fluid, injecting a drug solution, and inserting a guide wire. The tubes used in these applications are used indwelled in the body, and at the rear end, a connector communicating with each lumen of the tube is connected to the branch tube. The part is reinforced.

There are various types of connectors, such as a shape that fits into a syringe and a shape that can be connected to a male connector for a suction device. Generally, a connector that is thicker and larger than a branch tube in the radial direction is provided. . When the connector attached to the rear end of the tube is directly connected via the branch tube as in the former case, as shown in FIG. When the position becomes the same position in the length direction and the connectors are bundled by hand,
The bulk becomes large and becomes larger than the outer diameter of the tube. When the connector attached to the rear end of the tube is connected to the molded product via the branch tube as in the latter case, the molded product is usually larger than the tube outer diameter as shown in FIG. 2 (b-1). Has become.

[0004] In particular, the latter is often used for a small-diameter tube in which it is difficult to directly attach a branch tube, so that the molded product is often considerably larger than the tube outer diameter. Conventional products in which the rear end of the tube is larger than the outer diameter of the tube due to the bulkiness of the connector and the molded product as described above, for example, when guiding the tube through a bent place in a certain place in the body and placing it, the tube alone Because there is no stiffness and it is difficult to guide the tube, there is a case where a guide tube with an inner diameter larger than the outer diameter of the tube is inserted in advance, the tube is guided through the inside, and the tube is detained.
There is no particular problem until the guide tube is placed, but when the guide tube is removed after placement, the rear end of the tube, that is, the portion provided with the connector may be bulky and the guide tube may not be removed. Conversely, a guide tube may be inserted in order to easily remove the tube left in the bent place, and in this case, the rear end of the tube, that is, the portion with the connector is bulky, and the guide tube is Could not be inserted.

On the other hand, some products have a detachable connector so that a guide tube can be freely inserted and removed from the outside of the tube. This is because the fitting portion of the connector does not require much strength against pulling, that is, for example, when the connector is frequently used for cleaning with a large amount of liquid, injecting a chemical solution, or in the case of liquid leakage. It is also effective for those that do not need capacity management and those that do not have to worry about infection, but conversely, when requesting the mating force of the connector,
That is, it is unsuitable for capacity management or when there is a risk of infection. There is also a drawback that the attaching / detaching operation itself requires a considerable amount of time.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems described above, and the outer diameter of a medical tube provided with a plurality of connectors is made smaller than the outer diameter of the medical tube. A guide tube with an inside diameter of about one size larger can be used, so a medical tube that can be easily inserted and removed by using a guide tube even in a place where it is difficult to insert and remove with only the tube It is intended to provide.

[0007]

That is, the present invention relates to a medical catheter having a plurality of lumens and a branch tube connected to the rear end of the tube so as to communicate with each lumen. This is a method for arranging connectors attached to a medical tube, wherein a plurality of attached connectors are arranged so as to be shifted back and forth on a straight line with respect to the tube, and do not overlap with any connector.

[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 diagram showing one embodiment according to the present invention. (A-1) is a side view, and (a-2) is an AA ′ cross-sectional view. The medical tube (1) according to the present invention is a flexible tube having three lumens (5), (6), and (7) serving as flow passages penetrating in the longitudinal direction as shown in FIG. Tube (1), at the rear end of which each lumen (5) (6)
Three connectors (2) are provided via branch tubes (3) of three different lengths so as to communicate with (7), and the position of the connector (2) is aligned with the tube (1). The connector is displaced upward and backward so as not to overlap with any connector (2).

If the tube (1) does not have at least two lumens (2) serving as flow passages penetrating in the longitudinal direction,
Since there are no more than two connectors (2) at the rear end,
More than one applies. The length and material are not particularly limited, but the material is usually used for safety in medical applications, for example, silicone rubber, polyurethane, polyvinyl chloride, polyethylene, polypropylene, polyamide,
It is preferable to use polyester, fluororesin or the like. In the cross-sectional shape, the connector whose outer diameter is attached to the rear end (2)
Particularly useful for tubes (1) having the same outer diameter as

For example, when three 15 mm outer diameter tubes (1) having three lumens are provided at the rear end with three 5 mm outer diameter connectors via branch tubes (3) of the same length, 3 Even if the two connectors (3) are bundled, the guide tube (8) having an inner diameter of 16 mm can be easily inserted and removed because the outer diameter of the tube (1) does not become larger than that of the tube (1). There is no point in using different branch tubes (3) to shift the position of the connector (2) back and forth on the straight line so that it does not overlap. If the three connectors (2) having an outer diameter of 10 mm are attached at the same position along the straight line of the tube (1) without being shifted back and forth, the outer diameter of the tube (1) becomes larger than the outer diameter of the tube (1),
The 6 mm guide tube (8) cannot be inserted or removed, and in such a case, if the connector (2) is shifted back and forth, the 16 mm inner diameter guide tube (8) can be easily inserted, It can be removed and it is very useful to shift it back and forth in the connector (2). The outer diameter of the tube (1) varies depending on the number of lumens, that is, the number of connectors and the combination with the connector (2) having a different outer diameter, but preferably the same outer diameter as the connector (2) is preferable.
The outer diameter of the generally attached connector (2) is 5 to 15
mm, it is useful for the tube (1) in this range.

The branch tube (3) is connected to the connector (2).
It is necessary to adjust the length according to the length of each connector (2) so that the position of the connector (2) is shifted back and forth in a straight line with respect to the tube (1), so that it does not overlap with any connector (2). It is. The cross-sectional shape of the tube (1) is thin so that it can be joined to the lumens (5), (6), and (7) of the tube (1). The connector (2) side is thickened or tapered so that it can be easily joined at the joint portion of the connector (2). When the guide tube (8) is inserted and detached, the connector (2) is connected. When bundled, it is preferable because it is not bulky due to the branch tube (3). The material is not particularly limited, but it is preferable that the material be easy to operate on the connector (2), change its shape easily when the branch tubes (3) are bundled, and have flexibility so as not to be bulky.

The connector (3) is generally used for medical devices. The connector (3) is a female connector for connecting a suction device when discharging blood or body fluid, and the syringe is used for cleaning or injecting a drug solution. In many cases, a luer-shaped one, a one-way luer-shaped one with a valve when inflating the balloon, and other ones according to the intended use such as inserting a guide wire are connected. The material can be soft or hard, and the size is usually 5 to 15 mm.

[0013]

The following is a description of differences between the prior art according to the embodiment and the comparative example. [Example] An outer diameter of 2 mm was formed at the rear end of a tube having an outer diameter of 6 mm and a total length of 1 m having three lumens made of a soft vinyl chloride resin.
Transanal, each of which is connected to a branching tube made of a soft vinyl chloride resin with a total length of 5 cm, 10 cm, and 15 cm, and a polycarbonate connector having an outer diameter of 6 mm and a total length of 4 cm is connected to each branching tube. There is a tube. The outline of the tube is shown in Table 1.

[Comparative Example 1] 3 made of soft vinyl chloride resin
At the rear end of a tube having an outer diameter of 6 mm and a total length of 1 m having three lumens, three branch tubes made of a soft vinyl chloride resin having an outer diameter of 2 mm and a total length of 10 cm are connected, and each branch tube has an outer diameter of 6 mm. There is a transanal tube to which a 4 cm long polycarbonate connector is connected. The outline of the tube is shown in Table 1.

Comparative Example 2 3 made of soft vinyl chloride resin
At the rear end of a tube having an outer diameter of 6 mm and a total length of 1 m having two lumens, a molded product having a width of 30 mm, a thickness of 4 mm, and a total length of 5 cm and communicating with each lumen of the tube is connected. There is a transanal tube to which three branching tubes made of a soft vinyl chloride resin having a length of 2 cm and a length of 10 cm are connected, and a polycarbonate connector having a diameter of 6 mm and a length of 4 cm is connected to each branching tube. The outline of the tube is shown in Table 1.

[0016]

[Table 1]

[Example of Use] When a transanal tube is to be placed in the descending colon as shown in FIG.
Guide the tube through the sigmoid colon to the descending colon. At this time,
There are many bends before inserting the tube to the descending colon, and it is very difficult to pass through the sigmoid colon, in particular. Therefore, it is effective to insert a guide tube having an inner diameter of 16 mm from the anus into the sigmoid colon in advance to eliminate the bent portion, insert and place a transanal tube, and remove the tube having an inner diameter of 16 mm after the placement. However, when the tube of Comparative Example 1 or Comparative Example 2 was used, when removing the tube having an inner diameter of 16 mm after placing the tube, Comparative Example 1 was used.
In the case of the tube, the three connectors are located at the same position along the straight line with respect to the tube, and the connectors overlap, so that the tube is bulky. In the case of the tube of Comparative Example 2, the molded product is bulky and does not enter the tube having an inner diameter of 16 mm. Cannot be removed. However, in the tube of Example 1, the position of the connector attached to the rear end is shifted back and forth on the straight line with respect to the tube, and when bundled, the connectors do not overlap and have no bulk. Even when a tube having an inner diameter of 16 mm is placed, the tube having an inner diameter of 16 mm can be removed without being caught when the tube is removed, and the transanal tube can be easily placed up to the descending colon.

[0018]

As described above, if a plurality of connectors according to the present invention are provided and a medical tube in which the position of the connector is shifted back and forth in a line with respect to the tube is used, the connector is not bulky. A guide tube having a slightly larger inner diameter than the outer diameter of the medical tube can easily pass through, and even when the medical tube is placed in a bent portion, the medical tube is placed using the guide tube, and then the guide tube is placed. The tube can be easily removed, and even when the tube is removed, the guide tube is easily inserted from the outside of the medical tube and the medical tube can be easily removed, which is extremely useful.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment according to the present invention.

FIG. 2 is a schematic diagram according to a conventional invention.

FIG. 3 is a schematic view of the use according to an embodiment of the present invention.

[Explanation of symbols]

 1. Tube 2. Connector 3. Branch tube 4. Molded product 5. Lumen 1 6. Inner wall 2 7. Lumen 3 8 Guide tube 9. Descending colon 10. Sigmoid colon 11. Rectum 12. anus

Claims (1)

[Claims] 1. A catheter having a plurality of lumens for medical use, and a plurality of connectors attached to a rear end of the tube via a branch tube so as to communicate with each of the lumens. A method of arranging a connector attached to a medical tube, wherein the connector is arranged so as to be shifted in a front-rear direction with respect to a line and does not overlap with any connector.