JP2563797Y2 - Sheath for tip guide - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary device for introducing and placing a catheter tube or the like in a body in the medical field.

[0002]

2. Description of the Related Art Conventionally, when a medical instrument such as a catheter is introduced and placed in a body, generally, a guide wire is inserted into the body in advance, and the guide wire is passed through the lumen of the catheter, and is passed along the guide wire. A method of guiding and inserting a catheter has been adopted.

[0003] When a guide wire is passed from the catheter tip in this way, a curved or curled catheter such as a pigtail catheter that is not straight is used.
It is necessary to extend the guide wire so that the finger can easily enter the guide wire. However, depending on the shape and material of the catheter, there are drawbacks such as difficulty in extending and breakage in the middle.

[0004] An example of a peel-away sheath that can be detached from a catheter is one in which a weld line joined with a relatively weak force is formed at an intermediate portion of a strip provided in the longitudinal direction of a synthetic resin tube. (Japanese Unexamined Patent Application Publication No.
No. 76), the above-mentioned strip is made of a different material having no compatibility or adhesiveness with the tube main body and is made releasable (Japanese Patent Application Laid-Open Nos. 62-176559 and 63-252).
Nos. 169 and 63-288176).

However, these peel-away sheaths do not have slits, so that the catheter is likely to be broken when being removed from the catheter, or cannot be removed without tearing the peel-away sheath with both hands. In addition, when the strip is separated from the sheath, the strip is divided into two parts, so that the strip is easily scattered in the operating room, which is not hygienic, and has problems and disadvantages.

[0006]

SUMMARY OF THE INVENTION The present invention has been made as a result of various studies in order to solve the problem of operability to straighten the distal end of a curved or curled catheter. An object of the present invention is to facilitate the operation of inserting a guide wire into the tip of a curved or curled catheter or the like, and to reduce the time for introducing the catheter into the body.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an auxiliary tool for attaching and sliding the outer periphery of a catheter tube to extend the curved or curled distal end of the catheter tube. The hollow tube is made of a synthetic resin hollow tube, and at least part of the cross section of the tube is formed of a different material over the entire length in the longitudinal direction of the hollow tube. 0.5-5
A distal guide sheath, wherein a slit is formed in a longitudinal direction except for mm.

Hereinafter, the distal guide sheath of the present invention will be described with reference to the drawings. 1 and 2 are views showing the structure of a distal end guide sheath according to one embodiment of the present invention.

The distal guide sheath according to the present invention comprises a line (2) made of a different material over the entire length in the longitudinal direction, and a tube main body (1) forming a tubular shape of the entire sheath tube.
And approximately 0.5% on the tip side at approximately the center of the line (2).
A slit (3) is formed in the longitudinal direction except for about 5 mm, and the rear end side is cut diagonally. The cutting direction is a direction in which the rear end of the slit (3) becomes a valley of the oblique end surface.

When the catheter is inserted into the sheath, the gap is preferably as small as possible and the sheath can be slid smoothly on the catheter. The inner diameter of the sheath tube is actually set at the time of use. What is necessary is just to prepare according to the size of the combined catheter. Also,
The thickness of the sheath tube is preferably made as thin as possible so that it does not feel uncomfortable when the sheath tube is attached to the catheter, and considering that the sheath tube is easily torn.

The material constituting the sheath of the present invention is such that the tube body (1) is guided (extended) when a curved or curled catheter tip is guided (extended) such as polyvinyl chloride resin, polyethylene resin or polypropylene resin.
It is preferable to use a thermoplastic resin having an appropriate rigidity so that the sheath is not bent.

As the material of the line (2), use is made of a polyvinyl chloride resin, a polyethylene resin, a polypropylene resin or the like containing 30 to 70% by weight of inorganic fine particles and a relatively weakly bonded resin which is easily broken. I do. If the resin used as the base is the same as the material of the tube body (1), the line (2) is easily torn, while the connection between the tube body (1) and the line (2) is relatively strong, which is preferable. The result is obtained. In addition, a mixture of different types of resins, such as a blend of polyethylene and polypropylene, generally has low tear strength and can be used as the material of the line (2).

The present invention is different from the conventional example in that the connection between the tube body (1) and the line (2) is weakened and the line (2) is removed. The slit (3) plays a supplementary role to make the material easier to tear. For example,
Even if the material of the line (2) is not very easy to tear,
By adjusting the length left on the tip side of the slit (3), the slit (3) can be easily torn in accordance with its purpose and use.

Next, a method of using the distal guide sheath according to the present invention will be described. First, as shown in FIG. 3A, a catheter (5) having a curved or curled tip.
The guide sheath (4) is attached to the catheter, and then the guide sheath (4) is slid to the distal end side of the catheter as shown in FIG. Here, the rear end side of the guide wire (6) previously inserted into the body through the body wall (7) is passed through the lumen of the catheter (5), and the catheter (5) is inserted along the guide wire (6). Guide and insert into the body.

When the target position of the catheter (5) is noted in the body, the catheter (5) is removed along the slit (3) of the guide sheath (4) as shown in FIG. 3 (c). At this time, when the rear end side of the catheter (5) is lightly pulled laterally, the catheter (5) hits the rear end of the slit (3) located at the valley of the oblique end surface at the rear end of the sheath tube, and the slit ( 3) begins to spontaneously cleave. Finally, as shown in FIG. 4 (a), the catheter (5) and the guiding sheath (4) are pinched with both fingers and pulled, so that the catheter (5) is left on the extension of the slit (3) of the line (2). The broken part is easily torn and the guide sheath (4) can be removed.

Further, as shown in FIG. 2, two lines (2) are provided at opposite positions of the tube body (1), and the rear end side can be cut obliquely from two directions, that is, cut into a mountain shape. Although there is a problem of operability that the catheter cannot be held in addition to being detachable from either one of the two lines (2), depending on the situation, FIG.
It is also possible to remove it by tearing it in two as shown in FIG.

[0017]

[Effect of the Invention] By using the sheath for guiding the tip of the present invention, the tip of the curved or curled catheter can be smoothly extended without causing breakage or deformation, and a guide wire or the like is inserted. Therefore, the time required for introducing the catheter tube into the body can be shortened, so that it is suitable as an auxiliary tool for catheter insertion.

[Brief description of the drawings]

FIGS. 1A and 1B are views showing a distal guide sheath according to an embodiment of the present invention, wherein FIG. 1A is a top view, and FIG.
It is A 'sectional drawing.

FIGS. 2A and 2B are views showing a distal end guide sheath according to another embodiment of the present invention, wherein FIG. 2A is a top view and FIG.
It is B 'sectional drawing.

FIG. 3 is a view for explaining a method of using the distal guide sheath according to the present invention;

FIG. 4 is a view showing a state in which the distal guide sheath according to the present invention is removed from the catheter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube main body 2 Line 3 Slit 4 Guide sheath 5 Catheter 6 Guide wire 7 Body wall

Claims (2)

(57) [Scope of request for utility model registration] An auxiliary tool for attaching and sliding the outer periphery of a catheter tube to extend a curved or curled distal end of a catheter tube, the synthetic resin hollow having a rear end portion cut diagonally. A tubular body, at least a part of the tubular body cross-section is formed of a line made of a different material over the entire length of the hollow tubular body in the longitudinal direction, and a tip side of 0.5 to 5 mm is left almost at the center of the line. A distal guide sheath, wherein a slit is formed in a longitudinal direction. 2. The distal guide sheath according to claim 1, wherein the different materials forming the line are made of synthetic resin containing inorganic fine particles to reduce the tear strength.