JP3003906U - Curved outer tube for insertion of central venous catheter - Google Patents

Abstract

(57) [Summary] [Objective] The present invention is intended for insertion of a central venous catheter for the purpose of preventing the central venous catheter for subclavian insertion from entering the internal jugular vein and inserting it into the central vein as accurately as possible. Provide a curved outer cylinder. [Structure] A curved outer tube for inserting a central venous catheter having an inner diameter through which a central venous catheter 1 for subclavian retrieval can be easily passed and an obtuse curve 2 provided in a portion near the tip thereof. [Effect] By using the present invention, the catheter does not easily enter the internal jugular vein during the central venous catheter insertion operation without fluoroscopy or the use of a guide wire, and is easily inserted into the central vein as intended. ．

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This device is an aid for inserting a central venous catheter, which is a medical device, into the subclavian region, and it is possible to prevent the catheter from getting into the other vein and easily guide it in the central vein, that is, the superior vena cava. The objective is a curved outer tube for inserting a central venous catheter.

[0002]

[Prior art]

 When inserting a central venous catheter through the subclavian region by the conventional technique, first, a subclavian vein is punctured with a metal inner tubular needle covered with a straight outer tube, the inner tubular needle is removed, and then the straight outer tube is removed. A catheter was inserted through the tube from the subclavian vein to the central vein, but fluoroscopy and a guide wire are needed to guide the direction accurately, and blind insertion may lead to the internal jugular vein. , And in that case we had to reinsert it.

[0003]

[Problems to be solved by the device]

 This plan aims to prevent the central venous catheter from entering the internal jugular vein and to insert it into the central vein as accurately as possible, even at the bedside where fluoroscopy is difficult to use, and even without a guide wire. A curved outer tube for inserting a catheter is provided.

[0004]

[Means for Solving the Problems]

 Now, I will explain the solution by following the drawings.

According to the first aspect of the present invention, as shown in FIG. 1, a central vein having an inner diameter through which a central venous catheter 1 for subclavian retrieval can be easily passed, and an obtuse curve 2 is provided in a portion near the tip thereof. A curved outer cylinder 3 for inserting a catheter.

According to the second aspect, as shown in FIG. 2, the curved outer cylinder 3 of the first aspect is provided with a mark 4 indicating the bending direction.

According to the third aspect, as shown in FIGS. 3 and 4, the curved outer cylinder 3 of the first aspect is provided with a gap 5 in the major axis direction over the entire length thereof.

[0008]

[Work]

 After inserting the central venous catheter 1 to the subclavian vein by a general procedure, put the curved outer tube 3 that was previously covered on the proximal part of the central venous catheter 1 along the central venous catheter 1 as shown in FIG. If the small side of the curve is inserted toward the breast side, the curved outer tube 3 will face the central vein 7, and as shown in FIG. If the catheter 1 is advanced further, it is less likely to get into the internal jugular vein 8 branching to the head side, and the probability of reaching the central vein 7 as intended increases.

According to the second aspect, by inserting the mark 4 indicating the bending direction of the curved outer cylinder 3 toward the breast side, it can be confirmed that the curved outer cylinder 3 is directed toward the central vein 7. The

According to the third aspect, it is possible to confirm that the curved outer cylinder 3 is directed toward the central vein 7 by inserting the surface of the curved outer cylinder 3 having the void 5 toward the breast side.

According to the third aspect, as shown in FIG. 4, the curved outer cylinder 3 can be attached to and detached from the central venous catheter by the space 5 provided in the lower surface of the curved outer cylinder.

[0012]

【Example】

 Hereinafter, examples will be described in more detail.

The curved outer cylinder 3 of claims 1, 2 and 3 is required to have an inner diameter through which the central venous catheter 1 can be easily passed, but through the subclavian subcutaneous tissue and vein wall. In addition, the outer diameter is moderate and the bending angle is obtuse.

The mark 4 indicating the bending direction in claim 2 shown in FIG. 2 is required to be provided at the proximal portion of the curved outer cylinder, but may be provided over the entire length.

The gap 5 in claim 3 shown in FIGS. 3 and 4 has such a width that the shape of the curved outer cylinder 3 is not collapsed and that it can be attached to and detached from the central venous catheter 1.

[0016]

[Effect of device]

 As described above, with the use of the curved outer tube for inserting the central venous catheter of the present invention, the catheter can enter the internal jugular vein during the central venous catheter insertion operation without the use of fluoroscopy or a guide wire. There are few, and it is easy to insert into the central vein as intended.

[Brief description of drawings]

1 is a perspective view of claim 1 of the present invention;

FIG. 2 is a perspective view of claim 2 of the present invention.

FIG. 3 is a perspective view of claim 3 of the present invention.

FIG. 4 is a perspective view of an embodiment of claim 3 of the present invention.

FIG. 5 is a view of inserting a curved outer cylinder along a central venous catheter.

FIG. 6 is a diagram in which the catheter is directed to the central vein through the curved outer cylinder.

[Explanation of symbols]

 1 .. Central venous catheter 2 .. Obtuse bending 3 .. Curved outer cylinder 4 .. Marking indicating bending direction 5 .. Void 6. Subclavian vein 7 .. Central vein 8. Internal jugular vein

Claims (3)

[Scope of utility model registration request] 1. A curved outer type for inserting a central venous catheter, which has an inner diameter for easily passing a central venous catheter (1) for subclavian insertion and is provided with an obtuse curve (2) in a portion near its tip. Tube (3). 2. A curved outer tube (3) for inserting a central venous catheter according to claim 1, which is provided with a mark (4) indicating a bending direction. 3. A curved outer tube (3) for inserting a central venous catheter according to claim 1, wherein a void (5) is provided over the entire length in the longitudinal direction.