JP5999928B2 - Catheter hub and catheter - Google Patents

Description

  The present invention relates to a catheter hub and a catheter, and is suitable for use in, for example, an angiographic catheter used in an angiographic examination.

  2. Description of the Related Art Conventionally, angiographic examinations have been performed in which a X-ray is taken continuously while a contrast agent (medicine that blocks X-rays) is passed to check the form of blood vessels and the blood flow state. In this angiography examination, an angiographic catheter for injecting a contrast medium for angiography is used.

  The procedure of the angiographic examination will be described. First, a guide wire is inserted from the insertion port of the catheter hub provided at the proximal end portion of the angiographic catheter, and the guide wire is advanced to a position where it slightly protrudes from the distal end of the catheter. Next, the catheter is inserted into the blood vessel while pushing the guide wire ahead of the catheter and pushed to the contrast site. Next, when the distal end of the catheter reaches the contrast site, the guide wire is pulled out from the insertion port of the hub, and a manifold (for example, a triple three-way stopcock) for injecting a contrast agent is connected to the insertion port. Next, a contrast medium is injected from the manifold through the catheter hub and the catheter body, and at the same time, the contrast medium is ejected from the tip of the catheter. At the same time, the contrast medium ejected in the blood vessel is X-rayed to form the blood vessel morphology and blood. Diagnose flow conditions.

  Although it is not a technique related to angiography, a technique related to a catheter indwelling device for removing a puncture needle punctured into a blood vessel and leaving only the catheter in the blood vessel when injecting a nutrient to a patient has been proposed (for example, a patent) Reference 1).

JP 2009-232916 A

  By the way, in the conventional procedure in angiographic examination, when the angiographic catheter inserted into the blood vessel is pushed up to the contrast site, the insertion port (of the catheter hub) into which the guide wire is inserted remains open. Therefore, there is a problem that blood in the blood vessel flows backward (flashback) in the catheter, leaks out from the insertion port of the hub, and the examination room for performing the angiographic examination becomes dirty.

  An object of the present invention is to provide a catheter hub and a catheter capable of preventing blood in a blood vessel from leaking outside when the catheter inserted into the blood vessel is pushed up to the contrast site in an angiographic examination. And

Catheter hub according to the present invention, there is provided a catheter hub provided at the proximal end portion of the catheters body,
An injection device connection opening for injecting a contrast medium into the hollow passage, connected to the hollow passage formed in the proximal end of the catheter body from a substantially linear direction;
A guide wire introducing opening for introducing the guide wire into the hollow path, which is connected to the hollow path of the proximal end independently from the injection apparatus connecting opening from an oblique direction;
A leakage preventing member that is provided in the guide wire introduction opening and prevents fluid leakage from the guide wire introduction opening by deformation ;
A pusher that deforms the leakage prevention member by compressing the leakage prevention member;
An adjuster which is attached along the opening for connecting the injection device and can adjust the deformation amount of the leakage preventing member by pressing the pusher according to the screwing amount;
It comprises .

Further, the catheter according to the present invention is a catheter having a catheter body and a proximal end,
The base end is
An injection device connection opening connected to the hollow path formed in the base end portion from a substantially linear direction, and for injecting a contrast medium into the hollow path;
A guide wire introducing opening for introducing the guide wire into the hollow path, which is connected to the hollow path of the proximal end independently from the injection apparatus connecting opening from an oblique direction;
A leakage preventing member that is provided in the guide wire introduction opening and prevents fluid leakage from the guide wire introduction opening by deformation;
A pusher that deforms the leakage prevention member by compressing the leakage prevention member;
An adjuster which is attached along the opening for connecting the injection device and can adjust the deformation amount of the leakage preventing member by pressing the pusher according to the screwing amount;
It comprises .

According to the present invention, when the guide wire is inserted into the guide wire introduction opening newly added to the catheter hub and the catheter is pushed forward to the contrast region, the leakage preventing member provided in the guide wire introduction opening is provided. By increasing the internal pressure by compressing with a pusher, blood flowing backward in the catheter can be stopped by the leakage preventing member. Therefore, leakage of blood (fluid) from the guide wire introduction opening can be prevented. In addition, since the guide wire introduction opening and the injection device connection opening are formed independently of each other, the injection device (manifold) cannot be connected in a state where the guide wire is inserted. It is possible to continue to connect the injection device to the injection device connection opening while the guide wire is inserted, and it is possible to prevent blood from leaking from the injection device connection opening. Therefore, in angiographic examination, when the catheter inserted into the blood vessel is pushed up to the contrast site, blood in the blood vessel can be prevented from leaking out.

It is a fragmentary sectional view which shows the structural example of the hub for catheters with which the catheter in this Embodiment is provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial cross-sectional view illustrating a configuration example of a catheter hub 140 provided in the catheter 100 according to the present embodiment. In the present embodiment, the catheter 100 is an angiographic catheter used in an angiographic examination.

  In the following description, the right side in the figure is referred to as “right side” and the left side as “left side”. FIG. 1 schematically shows the characteristics of the configuration of the present invention. The length and diameter of each part can be suitably used as a catheter 100 that is inserted into a blood vessel and used. Any one can be used.

  As shown in FIG. 1, the catheter 100 includes a catheter main body 120 that is inserted into a blood vessel, and a catheter hub 140 that is connected to the proximal end portion of the catheter main body 120. A guide wire for guiding the catheter 100 from the distal end portion to the proximal end portion is inserted into the catheter main body 120 to the site for confirming the blood vessel form and blood flow state in the angiographic examination, while performing angiography. A hollow path (not shown) through which a contrast medium for introduction is introduced is formed.

  The catheter hub 140 is connected to an injection device for injecting a contrast agent (for example, a manifold such as a triple three-way stopcock or a syringe) and introduces the contrast agent from the injection device into the hollow passage of the catheter body 120. An infusion device connection opening 142 and a guide wire introduction opening 144 for introducing a guide wire from the outside of the catheter hub 140 into the hollow passage of the catheter body 120 are formed independently of each other.

  Inside the catheter hub 140, the inflation lumen 146 extends linearly and introduces a contrast medium from the injection device to the hollow passage of the catheter body 120 through the injection device connection opening 142, and in the middle of the inflation lumen 146. And a guide wire lumen 148 for introducing the guide wire from the outside of the catheter hub 140 to the hollow passage of the catheter body 120 through the guide wire introduction opening 144. The inflation lumen 146 and the guide wire lumen 148 communicate with each other inside the catheter hub 140. Then, one end of the inflation lumen 146 (the end opposite to the injection device connecting opening 142) and the hollow passage of the catheter body 120 communicate with each other.

  The guide wire introduction opening 144 prevents leakage of fluid that passes through the hollow passage of the catheter main body 120 (for example, a contrast medium for performing angiography or blood that flows backward in the catheter 100, that is, blood that flashes back). A cylindrical leakage prevention member 150 (for example, silicone rubber) is provided. The leakage prevention member 150 is provided with a hollow passage 151 for introducing a guide wire into the hollow passage of the catheter body 120. Leakage preventing member 150 contracts in the long axis direction of guide wire lumen 148 when an external compressive force is applied. Thereby, the diameter of the hollow path 151 becomes smaller than that before compression, and the internal pressure of the leakage preventing member 150 increases.

  In the present embodiment, a pusher 152 and a lock nut 154 are provided on the catheter hub 140 in order to apply a compressive force to the leakage preventing member 150 from the outside. The pusher 152 has a key shape, and is provided in a state where the left portion is inserted into the guide wire lumen 148 from the guide wire introducing opening 144. Similar to the leakage prevention member 150, the pusher 152 is provided with a hollow path 153 for introducing a guide wire into the hollow path of the catheter body 120. The diameter of the hollow path 151 of the leakage preventing member 150 is substantially the same as the diameter of the hollow path 153 of the pusher 152.

  The lock nut 154 has a hexagonal outer periphery, for example, and is fitted to a screw (not shown) provided on the convex portion 156 of the catheter hub 140. Then, by rotating the lock nut 154 in a predetermined direction, the lock nut 154 moves to the left side and presses the right end portion of the pusher 152. As a result, the pusher 152 moves to the left side in the guide wire lumen 148 and applies a compressive force to the right end portion of the leakage preventing member 150. The leakage preventing member 150 is contracted in the long axis direction of the guide wire lumen 148. The pusher 152 and the lock nut 154 correspond to a “compression portion” in the claims, which increases the internal pressure of the leakage prevention member 150 by compressing the leakage prevention member 150.

  Next, an angiographic examination procedure when the catheter 100 according to the present embodiment is used will be described. First, from the guide wire introducing opening 144 of the catheter hub 140 provided at the proximal end portion of the catheter 100, the hollow path 153 of the pusher 152, the hollow path 151 of the leakage preventing member 150, the guide wire lumen 148, the inflation lumen. 146 and the guide wire are inserted through the hollow passage of the catheter body 120, and the guide wire is advanced to a position where it slightly exits from the distal end of the catheter 100. Next, the lock nut 154 fitted to the screw provided on the convex portion 156 of the catheter hub 140 is rotated in a predetermined direction. As a result, the lock nut 154 moves to the left and presses the right end of the pusher 152, and the pusher 152 moves to the left in the guide wire lumen 148 and applies a compressive force to the right end of the leakage preventing member 150.

  Next, an injection device for injecting a contrast agent (for example, a manifold such as a triple three-way stopcock or a syringe) is connected to the injection device connection opening 142 of the catheter hub 140. Next, the catheter 100 is inserted into the blood vessel while the guide wire is advanced with respect to the catheter 100, and pushed forward to the contrast region.

  Next, when the distal end of the catheter 100 reaches the contrast site, the guide wire is pulled out from the guide wire introduction opening 144 of the catheter hub 140, and the inflation lumen 146 of the catheter hub 140 and the hollow passage of the catheter body 120 are removed from the injection device. The contrast medium is injected through the catheter 100 and the contrast medium is ejected from the tip of the catheter 100. At the same time, the contrast medium ejected in the blood vessel is X-rayed to diagnose the blood vessel morphology and blood flow state.

  As described above in detail, the catheter hub 140 of the present embodiment has a hollow path through which a contrast medium for angiography is introduced while a guide wire is inserted from the distal end portion to the proximal end portion. An injection device connection opening 142 is provided at the proximal end portion of the formed catheter main body 120 to connect an injection device for injecting a contrast agent and to introduce the contrast agent from the injection device into the hollow passage of the catheter main body 120. And a guide wire introduction opening 144 for introducing the guide wire from the outside of the catheter hub 140 into the hollow passage of the catheter body 120 is formed independently. Further, the guide wire introduction opening 144 has a leakage prevention that prevents leakage of fluid (for example, a contrast medium for performing angiography or blood flowing backward in the catheter 100) that passes through the hollow passage of the catheter body 120. A member 150 is provided. Further, a compressing portion (a pusher 152 and a lock nut 154) that increases the internal pressure of the leakage preventing member 150 by compressing the leakage preventing member 150 is provided.

  According to the present embodiment configured as described above, when the guide wire is inserted into the guide wire introduction opening 144 newly added to the catheter hub 140 and the catheter 100 is pushed to the contrast site, the guide wire introduction opening is pushed. The leakage preventing member 150 provided in the portion 144 is compressed by the compression portion to increase the internal pressure, so that the blood flowing backward in the catheter 100 can be stopped by the leakage preventing member 150. Therefore, leakage of blood (fluid) from the guide wire introducing opening 144 can be prevented. In addition, since the guide wire introduction opening 144 and the injection device connection opening 142 are formed independently of each other, unlike the conventional case where the injection device cannot be connected with the guide wire inserted, the guide wire is not provided. It is possible to continue connecting the injection device to the injection device connection opening 142 with the wire inserted, and it is possible to prevent blood from leaking from the injection device connection opening 142. Therefore, in angiographic examination, when the catheter 100 inserted into the blood vessel is pushed up to the contrast site, blood in the blood vessel can be prevented from leaking out.

  In the above embodiment, the example in which the leakage preventing member 150 is compressed using the pusher 152 and the lock nut 154 has been described. However, the present invention is not limited to this. In short, any means may be used as long as it is a means for increasing the internal pressure of the leakage preventing member 150 by compressing the leakage preventing member 150.

  In addition, each of the above-described embodiments is merely an example of actualization in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

DESCRIPTION OF SYMBOLS 100 Catheter 120 Catheter main body 140 Catheter hub 142 Injection device connection opening 144 Guide wire introduction opening 146 Inflation lumen 148 Guide wire lumen 150 Leakage prevention member 151, 153 Hollow path 152 Pusher 154 Lock nut 156 Protrusion

Claims (2)

A catheter hub provided at the proximal end portion of the catheters body,
An injection device connection opening for injecting a contrast medium into the hollow passage, connected to the hollow passage formed in the proximal end of the catheter body from a substantially linear direction;
A guide wire introducing opening for introducing the guide wire into the hollow path, which is connected to the hollow path of the proximal end independently from the injection apparatus connecting opening from an oblique direction;
A leakage preventing member that is provided in the guide wire introduction opening and prevents fluid leakage from the guide wire introduction opening by deformation ;
A pusher that deforms the leakage prevention member by compressing the leakage prevention member;
An adjuster which is attached along the opening for connecting the injection device and can adjust the deformation amount of the leakage preventing member by pressing the pusher according to the screwing amount;
A catheter hub comprising: A catheter having a catheter body and a proximal end,
The base end is
An injection device connection opening connected to the hollow path formed in the base end portion from a substantially linear direction, and for injecting a contrast medium into the hollow path;
A guide wire introducing opening for introducing the guide wire into the hollow path, which is connected to the hollow path of the proximal end independently from the injection apparatus connecting opening from an oblique direction;
A leakage preventing member that is provided in the guide wire introduction opening and prevents fluid leakage from the guide wire introduction opening by deformation;
A pusher that deforms the leakage prevention member by compressing the leakage prevention member;
An adjuster which is attached along the opening for connecting the injection device and can adjust the deformation amount of the leakage preventing member by pressing the pusher according to the screwing amount;
A catheter comprising:

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