JPH1085341A - Connector with hemostatic valve for catheter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector with a homeostatic valve for catheter completely preventing blood outflow. SOLUTION: The connector 10 with a hemostatic valve to be mounted at the terminal of a catheter comprises a soft valve member 1 having a through hole 11 which a given diameter in the axis direction at the center thereof, a valve containing member 2 comprising a valve containing room 21 inside of the rear end thereof and a female screw 211 at the inside of the rear end of the room 21, a male screw 212 outside of the front end thereof, a valve pressing member 3 comprising a valve pressing projecting part 31 inside of the front end thereof and a male screw 311 screwing to the female screw 211 of the valve containing member 2 at the outer periphery of the projecting part 31 and a female Luer part 312 at the outer rear end thereof, and a cap 4 comprising a female screw 412 formed at inside of the rear end thereof so as to screw to the male screw 212 of the valve containing member 2 and a catheter holding face 411 at the inside of the center thereof. The soft valve member 1 is received in the valve containing room 21 of the valve containing member 2 and the through hole 11 in the axis direction of the soft valve member 1 is expanded or contracted by adjusting the state of screwing of the male screw 311 of the valve pressing member 3 and the female screw 211 at the inside of the rear end of the room 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector attached to an extracorporeal terminal of a catheter placed in a human body, and more particularly to a connector for a catheter having a hemostatic valve.

[0002]

2. Description of the Related Art Conventionally, when a catheter is used on a human body, a connector is attached to an extracorporeal terminal of the catheter to prevent blood loss, a stopcock or the like is connected to the connector, and a surgeon manually opens and closes the stopcock. Had gone. However, when a stopcock or the like is used, the stopcock or the like cannot be operated without leaving a guide wire or a catheter tube having a smaller diameter required for the operation of inserting the catheter into the human body. Therefore, it is difficult to prevent blood loss while a stopcock or the like cannot be operated. This not only places a burden on the patient, but also puts the practitioner at risk of infection.

There is also a so-called Y connector. This Y connector has a large inner diameter
It is connected to the terminal of the catheter, and is used when the original small-diameter catheter reaches a required site in the body. However, even with this Y connector, outflow of blood cannot be prevented.

On the other hand, there has been proposed a connector capable of performing a catheter operation while preventing blood loss (Japanese Patent Publication No. Sho 5 (1993)).
JP-A-7-43261) has a complicated structure, is very expensive, and has a large economic burden on patients and practitioners.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive and simple connector for a catheter with a hemostatic valve, which can completely prevent blood loss when performing a catheter operation.

[0006]

According to the present invention, there is provided a connector for a catheter with a hemostatic valve according to the present invention, wherein a soft valve member having an axial hole with a predetermined diameter in the center and a rear end inner portion are provided. A valve housing member, a female screw is provided on the inner surface of the rear end of the chamber, a valve housing member having a screw provided on the outside of the front end, and a valve pressing protruding portion is provided inside the front end, and the valve is provided on the outer periphery of the protruding portion. A valve pressing member provided with a male screw to be screwed into the female screw of the housing member, and a female luer portion provided outside the rear end,
The above-mentioned problem is solved by a means comprising a female screw which is screwed into a male screw of the valve accommodating member inside the rear end and a cap provided with a catheter holding surface inside the center.

[0007]

The soft valve member is accommodated in the valve accommodating chamber of the valve accommodating member, and the axial hole of the soft valve member is adjusted by adjusting the screw engagement between the external thread of the valve pressing member and the internal thread of the rear end inner surface of the chamber. Scale. In this way, the soft valve member can open and close in the same manner as a stopcock or the like.

[0008] When the axial hole of the soft valve member is fully opened or partially opened, it becomes possible to inject a medical solution or the like or to insert a guide wire or the like into the catheter through the connector, and to close or partially close the axial hole. When closed, blood is prevented from flowing out of the catheter, or the guide wire or the like is hermetically gripped while the guide wire or the like is kept in the catheter.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a catheter connector with a hemostatic valve according to the present invention will be described with reference to the drawings.

[0010] The connector of the present invention is attached to an extracorporeal terminal of a catheter placed in the body, and is used for insertion / withdrawal of a guide wire or the like and injection of a drug solution or the like.

[0011]

Embodiment 1 As shown best in FIG. 1, a catheter connector 10 with a hemostatic valve according to the present invention mainly comprises a soft valve member 1 having an axial hole 11 having a predetermined diameter in the center, and a rear end inside. The valve housing member 2 is provided with a female screw 211 on the inner surface of the rear end of the chamber 21 and a screw 212 provided on the outside of the front end. The female screw 211 of the valve housing member 2
And a female screw 412 screwed to the external thread 212 of the valve housing member 2, and a valve pressing member 3 provided with a luer portion 312 external to the rear end.
Cap 4 provided with catheter holding surface 411 in the center
Consists of

The connector 10 of the present invention may be provided with an O-ring 5, a stopper 6, and a grip 7 as required, in addition to the above-described components, as shown in FIG.

As shown best in FIGS. 2 and 3, these parts include an O-ring 5 and a flange 2 at the rear end of the valve housing member 2.
13, the stopper 6 is adhesively fixed to the outer periphery of the rear end of the member 2 and to the front end hood 313 of the valve pressing member 3 to prevent the members 2 and 3 from separating. The grip 7 is adhered and fixed to the central step portion 214 of the member 2 to facilitate the rotation of the member 2.

In the present specification, the “front end” means
2 means the left side, that is, the terminal side of the catheter 100, and the "rear end" means the right side in FIG.
That is, it means the female lure terminal side. Hereinafter, the same applies to each component in each drawing.

Next, the operation of the embodiment of the catheter connector with a hemostatic valve according to the present invention will be described.

FIG. 2-4 shows a state where the disassembled connector 10 shown in FIG. 1 is assembled. FIG. 2 is a side view showing an appearance of the connector 10, and shows a state in which a terminal of the catheter 100 is attached to a distal end of the connector 10, and a terminal of a female lure 200 is attached to a rear end of the connector 10. 3 and 4 are longitudinal sectional views of the connector 10,
FIG. 3 shows a state where the axial hole 11 of the soft valve member 1 is open, and FIG. 4 shows a state where the axial hole 11 is closed.

In assembling the connector 10, first, the soft valve member 1 is inserted into the valve accommodating chamber 21 of the valve accommodating member 2, and the external thread 311 of the valve pressing member 3 is connected to the internal thread 2 of the member 2.
11, and the screwing is advanced until the valve pressing protruding portion 31 of the member 3 comes into contact with the soft valve member 1.

Next, as described above, the O-ring 5, the stopper 6, and the grip 7 are mounted on the members 2, 3. At this point, the member 2 and the grip 7 are fixed, and the member 3 and the stopper 6 are fixed. In this state, by rotating the grip 7 and the member 3 in directions opposite to each other, the member 2,
3 can be relatively moved in the axial direction.

Subsequently, as shown in FIG.
00 is inserted into the cap 4, and as shown in FIG.
The female screw 412 of the cap 4 is replaced with the male screw 21 of the valve housing member 2.
2, and the terminal of the catheter 100 is pressed and fixed to the catheter holding surface 411 of the cap 4.

Next, as shown in FIG. 7, the valve pressing member 3
The terminal of the female lure 200 is connected to the female lure unit 312. At this time, since the axial hole 11 of the soft valve member 1 is open, the guide wire 300 (FIG. 8) can be inserted and removed through the female luer 200, the connector 10, and the catheter 100. Etc. can also be injected.

As shown in FIG. 8, when the catheter 100 is inserted into the body while the guide wire 100 is kept in the catheter 100, the two members are relatively rotated so that the members 2 and 3 approach each other. Then, the soft valve member 1 is compressed. As a result, the diameter of the axial hole 11 is reduced, and the soft valve member 1 grips the guide wire 300 in an air-tight or liquid-tight state, thereby preventing blood or body fluid from leaking from the catheter 100.

The guide wire 300 is connected to the catheter 100
To remove from the, the reverse operation may be performed.

The members 2, 3 are preferably made of a transparent plastic material. Outer periphery of member 3, grip 7
It is preferable to provide irregularities on the outer periphery of the outer periphery for preventing the finger of the user from slipping. The soft valve member 1 is preferably made of silicone rubber.

[0024]

According to the connector for a catheter with a hemostatic valve of the present invention, the operation of opening and closing the hemostatic valve is simple, the valve can be continuously changed from fully open to fully closed, and the insertion into the catheter can be prevented. Also, air-tight and liquid-tight gripping can be performed. Since the structure of the connector is simple, it can be manufactured at a low cost, and the economic burden on the patient and the practitioner can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded longitudinal sectional view of a catheter connector with a hemostatic valve of the present invention.

FIG. 2 is a plan view of the connector of FIG. 1 in an assembled state.

FIG. 3 is a longitudinal sectional view of FIG. 2, showing a soft valve member in a fully opened state.

FIG. 4 is a longitudinal sectional view of FIG. 2, showing a fully closed state of a soft valve member.

FIG. 5 is a longitudinal sectional view of a cap of the connector, showing a state where a terminal of a catheter is mounted.

6 is a longitudinal sectional view similar to FIG. 3, showing a state where a terminal of a catheter is mounted.

FIG. 7 is a drawing similar to FIG. 6, showing a state in which a lure is attached to the rear end of the connector.

FIG. 8 is a view similar to FIG. 4, but showing a state in which a guide wire is sealed and held in a connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Soft valve member 2 ... Valve accommodating member 3 ... Valve pressing member 4 ... Cap 5 ... O-ring 6 ... Stopper 7 ... Grip 11 ... Axial hole 10 ... Catheter connector 100 ... Catheter 200 ... Female luer 300 ... Guide wire

Claims (1)

[Claims] 1. A connector to be attached to a terminal of a catheter, comprising: a soft valve member having an axial hole with a predetermined diameter in the center; and a valve accommodating chamber provided in a rear end of the connector. A valve accommodating member provided with a screw and a thread provided on the outside of the front end; a valve pressing protruding portion provided inside the front end; and a male screw screwed into an internal thread of the valve accommodating member provided on an outer periphery of the protruding portion. A valve pressing member provided with a female luer portion on the outside of the end, a female screw provided on the rear end of a female screw to be screwed with a male screw of the valve housing member, and a cap provided with a catheter holding surface in the center; The member is accommodated in the valve accommodating chamber of the valve accommodating member, and the axial hole of the soft valve member is enlarged / reduced by adjusting the screw engagement between the external thread of the valve pressing member and the internal thread of the rear end inner surface of the chamber. For a catheter with a hemostatic valve