JPH0551357U - Medical tube introduction tool - Google Patents

Abstract

(57) [Abstract] [Constitution] Branch tube (7) with sheath tube (1) connected
A main body part (2), a cap part (3) having a rear end opening (10), and a valve mechanism which is sandwiched between the main body part and the cap part for maintaining a liquid-sealed state when a tube is inserted ( 5), the inner hole (2) of the root of the branch pipe (7)
The cross-sectional shape of (0) has an elongated shape as shown in FIGS. [Effect] When a catheter having a complicated tip is inserted through the valve mechanism (5), the catheter tip does not catch or enter the root inner hole (20), and the catheter is safe. It can be certainly introduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of an introduction tool used for ensuring safety and certainty when introducing medical tubing such as a catheter into a body, particularly a blood vessel.

[0002]

[Prior Art]

 For the purpose of diagnosis or treatment, for example, when introducing a blood vessel balloon catheter, an angiography catheter, or a catheter with a sensor that detects temperature, pH, oxygen, etc. into a blood vessel, extremely careful, safe and reliable treatment operation is required. Required.

Usually, as a procedure for percutaneously introducing a blood vessel catheter into a blood vessel, first, a guide wire is inserted into the blood vessel by the cell singer method, and then an introduction tool including a dilator is installed along the guide wire. After the dilator and the guide wire have been removed, the tip of the introducer is left behind, and the catheter is inserted into the blood vessel along the guide of the introducer.

As shown in FIG. 1 (a), the introduction tool used for this treatment includes a main body part (2) to which a sheath tube (1) is connected, and a cap part (3) fitted with the main body part (2). ), And a membrane-shaped valve mechanism made of an elastic material for holding a catheter (4) sandwiched and fixed between the main body part (2) and the cap part (3) and inserting the inner part in a liquid-sealed state. As shown in Fig. 5, the tip shape called (a) pigtail catheter or (b) (c) Judkin's catheter is complicatedly bent. There is a catheter. These catheters (4) are inserted and penetrated through the main body part (2) through the valve mechanism (5) as shown in FIG. 4, but the tip of the catheter (4) is bent. Not only cannot be smoothly inserted into the sheath tube (1) by being caught in the root inner hole (20) of the branch pipe (7), but if it is forced into the sheath tube (4), the distal end of the catheter (4) is There was a problem that it was broken or crushed.

[0005]

[Problems to be solved by the device]

 The present invention thus solves the problem that when a medical tube such as a catheter is attached to a tube introduction tool, the tip end of the tube is caught in the inner hole of the root of the branch pipe of the introduction tool. In particular, the present invention aims to provide a tube introduction tool having high safety and reliability when it is introduced into a blood vessel.

[0006]

[Means for Solving the Problems]

 That is, the present invention is directed to a main body portion having a branch pipe that is expanded in diameter from a distal end portion to which a sheath tube is connected, a cap portion having a rear end opening fitted to the main body portion, the main body portion and the cap portion. And a valve mechanism for maintaining a liquid-sealed state with the insertion tubes, and the cross-sectional shape of the root of the branch pipe that connects the lumen of the main body part and the branch pipe is It is a medical tube introduction tool characterized by an elongated shape such as a linear shape, a spindle shape, an elliptical shape, and an oval shape.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a medical tube introducing device according to the present invention, FIG. 2 is a perspective view showing an external appearance and an internal structure, (2) is a main body part, (3) is a cap part, (5) Is a valve mechanism.

A sheath tube 1 for introducing the catheter (4) into the body is connected to a tip portion of the main body portion (2), and a chemical solution or the like is supplied to the body portion whose diameter is expanded from the tip portion. The branch pipe (7) is installed. The length of the sheath tube (1) varies depending on the purpose, but is generally set within the range of 10 to 170 mm. The cap portion (3) is joined to fit the body portion (2) to form a rear end opening (10). The valve mechanism (5) is fixed by being sandwiched between the members of the main body part (2) and the cap part (3), and the introduction hole defined by the body part of the main body part (2) when the tubes are not inserted. When the tube (11) is closed and a tube such as a catheter (4) is inserted, a flexible elastic material selected from, for example, rubber, resin, etc. is used so as to keep the liquid-tight state in close contact with the outer surface thereof. It is formed by a disc-shaped valve. As for the structure of the valve, it is preferable to stack and set a plurality of sheets as shown in FIG. 1 to ensure the sealing performance.

The main improvement of the present invention is that the cross-sectional shape of the root inner hole (20) of the branch pipe (7) in the above structure is streamlined as shown in FIGS. 1 (b) to (d). It is in the shape of a slender shape such as a spindle, an ellipse, or an oval. The long axis direction is made to coincide with the length direction of the sheath tube (1) through which the catheter (4) is inserted. The shape of the cross section may take various shapes other than the above, but the shape is not particularly limited as long as its short diameter is smaller than the diameter of the catheter to be used and the tip of the catheter is difficult to catch or enter. On the other hand, the cross-sectional area of the root inner hole (20) needs to be larger than the lumen area of the supply tube (14), and the inner surface should be a curved surface without corners so that the liquid can smoothly flow. desirable.

In using the medical tube introducing device having the above-mentioned configuration, first, a hollow needle with an inner needle is percutaneously punctured and inserted into a blood vessel, and then the inner needle is removed to insert the hollow needle into the hollow needle. Insert the guide wire, then remove the hollow needle and leave only the guide wire in the blood vessel. Therefore, as shown in FIG. 3 (a), the distal end of the dilator (dilator) (13) is inserted along the guide wire (12) while expanding the wall hole of the blood vessel, and the sheath tube (1) is inserted into the blood vessel. To be introduced inside. Then, the diluter (13) and the guide wire (12) are removed while inserting the supply tube (14) into the branch pipe (7) and injecting heparinized saline into the introduction hole (11). Here, the catheter (4) is smoothly introduced into the blood vessel (15) through the tube introduction tool (25) without hooking the tip of the root inner hole (20) of the branch pipe (7). To do. FIG. 3 (b) shows a state where a catheter is introduced through the introduction tool at this stage, where (4) is a catheter and (15) is a blood vessel.

The function of the valve mechanism (5) in the operating process is to seal the outer surface of the guide wire (12) and the dilator (13) while the guide wire (12) and the dilator (13) are being inserted, thereby sealing the liquid, thereby preventing backflow and outflow of blood. To prevent. Even when the guide wire (12) and the dilator (13) are removed, the blood that flows back through the sheath tube (1) can be completely blocked.

[0012]

[Effect of the device]

 As described above, the medical tube introduction tool according to the present invention should be used because the inner diameter of the root of the branch pipe has a slender cross-sectional shape such as streamlined, spindle-shaped or oval. Thus, safety and certainty can be effectively improved and improved when introducing a catheter having any tip shape.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of the present invention, (a) is a cross-sectional view of a tube introducing tool, and (b) to (d) are views showing an example of a cross-sectional shape of a root inner hole of a branch pipe. is there.

FIG. 2 is a three-dimensional perspective view showing the external appearance and internal structure of the tube introduction tool according to the present invention.

FIG. 3 is a view showing a use state of the tube introducing tool.

FIG. 4 is a three-dimensional perspective view for explaining a usage state of a conventional tube introduction tool.

FIG. 5 is a view showing a shape of a catheter tip portion.

[Explanation of symbols]

 1 sheath tube 2 main body part 3 cap part 4 catheter 5 valve mechanism 7 branch pipe 20 root part inner hole

Claims (1)

[Scope of utility model registration request] 1. A body part having a branch pipe whose diameter is expanded from a tip part to which a sheath tube is connected, a cap part having a rear end opening fitted to the body part, and between the body part and the cap part. And a valve mechanism for holding a liquid-sealed state with the insertion tubes, and the cross-sectional shape of the branch pipe root part that communicates the inner lumen of the main body part with the branch pipe has a streamline shape or a spindle shape. A medical tube introduction tool characterized by having an elongated shape such as an ellipse or an oval.