KR100351320B1 - Catheter - Google Patents

Abstract

The catheter can be easily inserted into the patient's stomach or duodenum entrance by allowing the angle of the external tip to be arbitrarily adjusted.The contrast length can be accurately measured in the gastrointestinal or duodenum by forming a contrast agent outlet and a marker at the tip of the inner tube. It is about a catheter made.

Such a catheter has an appearance that maintains a constant shape and is flexible and both sides are formed of openings; An inner tube movably inserted into the exterior and having a constant elastic force to maintain its shape; A guide wire movably inserted into the inner tube, having a self-elastic force, and guiding the inner tube into the lesion; Provided to the outer appearance, the user can freely bend the outer end portion according to the degree of bending of the engine so that when inserting the appearance into the interior of the human organs, it can be easily inserted toward the entrance when the bending direction of the human organs is different It provides a catheter comprising a deflection control means for.

Description

Catheter {CATHETER}

The present invention relates to a catheter, and more particularly, it is possible to arbitrarily adjust the angle of the external tip to facilitate insertion of the catheter toward the inlet of the patient's stomach or duodenum, and to form a contrast agent outlet and a display at the tip of the inner tube It relates to a catheter made to accurately measure the length of the lesion in the stomach or duodenum.

In general, due to diseases occurring in the human body, the lumens in the body are narrowed and may be in a state in which a function may be degraded or, in severe cases, no function.

For example, when the gastrointestinal inlet is blocked by gastric cancer, when the gastric cancer invades the lower esophagus, or when a portion of the esophagus due to esophageal cancer is constricted.

In particular, most of the malignant narrowing of the stomach or duodenum develops the cause of gastric or pancreatic cancer, and when the lumen is narrowed, food and the like do not flow smoothly.

Therefore, it is necessary to expand the narrowed lumen or prevent the enlarged lumen from narrowing again. In order to expand the narrowed passage and maintain the expanded state, a so-called stent formed of a cylindrical mesh is stenosis of the lumen. Stent implantation is performed.

In stent implantation in the stomach or duodenum, medical conduits called guide wires and catheters are used.

The catheter is inserted into the stomach by a certain length through the patient's mouth. Then, the guide wire is first inserted into the upper body or the stenosis of the duodenum through the interior of the catheter. The catheter is inserted along the guide wire.

Thereafter, the contrast agent is injected through the contrast agent injection port installed in the catheter to determine the position of the constriction, and the length of the constriction is measured using a radiopaque indicator attached to the inner tube, and then replaced with a guide wire having excellent strength.

Then, the catheter is removed to the outside through the mouth, and the stent insertion tube with the stent is inserted along the pre-inserted guide wide to insert the stent into the stenosis.

However, the conventional catheter is made of a limited shape pre-formed to fit the human body structure, there is a problem that is difficult to use in the site, such as the stomach, duodenum and other deformed vascular structure.

Especially in patients with malignant gastric or duodenal stenosis, the anatomical structure of the esophagus and gastrocnemius, the curvature angles of the pylorus toward the gastric and duodenum entrances are so large that the guide wire passes through the stenosis. There is a difficulty, and if the guide wire does not pass through the stenosis, the stent cannot be inserted eventually.

In addition, in order to insert the stent, the position and length of the stricture of the stomach or duodenum should be accurately measured, but the conventional catheter cannot accurately measure this, and thus there is a problem in that the optimal stent is not inserted into the stenosis.

In addition, there is a problem in that the procedure has to be replaced with another catheter to which the radiopaque material is attached to measure the position and length of the stenosis, and a guide wire must be removed to inject a contrast agent to determine the position of the stenosis.

Therefore, the present invention has been proposed to solve the above problems, an object of the present invention is to allow the user to arbitrarily adjust the angle of the catheter tip to easily insert the catheter toward the inlet of the stomach or duodenum of the patient, To provide a catheter equipped with the ability to accurately measure the size and length of the lesion by passing the guide wire and the catheter simultaneously to the lesion in the stomach or duodenum, without replacing the other catheter for measuring the length of the lesion.

In order to realize the object of the present invention as described above, it has an appearance while maintaining flexibility and both sides of the opening;

An inner tube movably inserted into the exterior and having a constant elastic force to maintain its shape;

A guide wire movably inserted into the inner tube, having a self-elastic force, and guiding the inner tube to be inserted into a lesion;

The front end portion is provided in the external appearance, and the user can freely insert the exterior tip part in accordance with the degree of bending of the engine so that the external body can be easily inserted in the inlet direction when the bending direction of the human organ is different when the external body is inserted into the human organ. It provides a catheter comprising a bending control means for enabling.

The inner tube is formed with a display portion made of a radiopaque material to measure the length of the lesion, the front end portion of the inner tube is characterized in that the contrast medium injection port for injection of the contrast medium is injected to measure the position and size of the lesion do.

A shape retainer is provided in the inner longitudinal direction of the inner tube to maintain the shape of the inner tube, and the shape retainer is formed of an elastic member having a predetermined elasticity, and is installed with a predetermined length protruding from the tip of the inner tube. It is done.

1 is an exploded perspective view showing a catheter according to the present invention.

Figure 2 is a perspective view of the coupled state of the catheter according to the present invention.

Figure 3 is a cross-sectional view of the coupled state of the catheter according to the present invention.

Figure 4 is an enlarged perspective view of the main portion of the tip of the catheter according to the present invention.

5 and 6 are partially enlarged cross-sectional view showing a state of use of the catheter of the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail.

Figure 1 is an exploded perspective view of the catheter according to the present invention, Figure 2 is a perspective view of the combined state of Figure 1, Figure 3 is a cross-sectional view of Figure 2, the catheter according to the present invention is flexible to be inserted into the engine An outer tube 2 having both sides of an open portion, the inner tube 4 having a constant elastic force to maintain its shape, and being inserted into the inner tube 4 and movably inserted into the outer tube 2; And a guide wire 6 for guiding the inner tube 4 into the lesion.

The outer tube 2 and the inner tube 4 have a predetermined length and are formed in the form of a cylindrical tube with both sides open. The inner diameter of the outer tube 2 is larger than the outer diameter of the inner tube 4 so that the inner tube 4 has an outer tube. (2) It can move freely within.

The inner tube 4 is formed to be longer than a certain length than the outer tube 2 so that the inner tube 4 is inserted to the end of the outer tube 2, and is configured to be inserted into the duodenum inlet from the stomach.

The appearance (2) can be bent to some extent and can be made of a thermoplastic resin, polyethylene, polypropylene or the like, which is harmless to the human body.

In the inner longitudinal direction of the inner tube (4) is provided a shape retainer (8) for maintaining the shape of the inner tube (4), the shape retainer (8) is to insert the catheter into the internal organ inside the human body It is a member provided to prevent the catheter from bending at the bent portion and to allow the pushing force to the tip of the inner tube 4 to be reliably acted so that the inner tube 4 can be easily inserted to the lesion.

To this end, the inner tube 4 surrounding the shape retainer 8 is covered with a compression tube or synthetic resin and is tightly coupled to the shape retainer 8.

The shape retainer (8) is made of an elastic member in the form of a coil wound continuously with a metal wire having a constant elasticity, is formed in the entire length along the inside of the inner tube (4) while a predetermined length protrudes from the tip of the inner tube (4) It is installed so that it can slide well on the wall of the engine and bend smoothly at the same time.

That is, the predetermined portion of the front end portion of the shape retainer 8 is provided without a coating of the inner tube 4 made of the compression tube, so that the front end of the shape retainer 8 can be more smoothly and easily bent.

In the present embodiment, the shape retainer 8 is made of an elastic member in the form of a coil wound continuously with a metal wire, but is not limited thereto. For example, the shape retainer 8 may be made of a tube or pipe having a predetermined elastic force.

In the longitudinal direction of the rear end of the outer tube 2 and the inner tube 4, the y-shaped connectors 14 and 16, which penetrate the inside thereof and the ports 10 and 12 are formed laterally, are provided with the outer tube 2 and the outer tube 2, respectively. The same axial line of the inner tube 4 is maintained and each is fixed through the connection part.

Therefore, the catheter of the present embodiment is made so that the inner tube 4 can be inserted into the exterior 2 through the connector 14, and the guide wire 6 penetrates into the inner tube 4 through the other connector 16. ) Is formed to be movably inserted.

And the exterior (2) has a bending for the user to arbitrarily adjust the degree of bending and the direction of the front end of the exterior (2) so that the inner tube (4) can be easily inserted into the duodenum entrance when the direction of bending as shown in the duodenum is different The adjusting means is installed.

This bending adjusting means is fixed to the outer side of the front end of the exterior 2 as shown in FIG. 3A by a fixing member 18, and when the exterior 2 is bent, the exterior 2 is prevented from being distorted while maintaining its elasticity. An elastic body 20 capable of being returned to its original state;

One end is connected to the front end of the elastic body 20 and the other side is exposed to the outside through the port 10 extending from the connector 14 body so that the user can bend the elastic body 20 so that the exterior part 2 is It consists of an adjusting member 22 for arbitrarily adjusting the degree of bending.

The adjusting member 22 is a fixed member for extending one side is inserted between the exterior (2) and the inner tube (4), and then penetrates to the outside of the exterior (2) to fix the front end of the elastic body 20 ( 18), the other end is pulled out from the outside through the port 10 of the connector 14, the end of the handle portion 24 is formed to facilitate the pulling have.

In addition, the end of the port 10 is provided with a locking member 26 for the user to fix the adjustment member 22 in the adjusted state.

The locking member 26 pulls the adjusting member 22 so that the tip of the outer cover 2 is bent as much as the user desires, thereby compressing the adjusting member 22 in the port 10 to fix it. ) Is provided to be able to remain bent.

In this embodiment, the adjusting member 22 is made of one, but if two or three adjusting members are installed at equal intervals, the front end portion 2 can be freely bent in all directions.

At the distal end of the inner tube 4 movably inserted into the exterior 2, a plurality of contrast agent ejecting holes 28 are injected with contrast medium injected from the outside to measure the position and size of the lesion as shown in FIG. 4. ) Is punctured, made of a radiopaque material to measure the length of the lesion, and the display unit 30 is formed at regular intervals.

The contrast agent is a radiopaque fluid to determine the position and size of the lesion as well as the degree of insertion of the catheter under the fluoroscopy, as shown in Figure 3b of the connector 16 is fixed to the rear end of the inner tube (4) It is configured to inject the contrast agent into the injector 32 through the port 12, and when the contrast agent is injected through the injector 32 so that the contrast agent is ejected through the contrast agent outlet 28 while moving along the inner tube (4). It is composed.

The contrast agent outlet 28 is drilled a lot in the front end side of the inner tube 4, as shown in Figure 4, gradually penetrating toward the rear end of the inner tube 4 through the port 12 of the connector 16 When injecting, pressure is applied evenly to the front end of the inner tube 4 which receives the ejection pressure of the contrast medium and the rear end of the inner tube 4 which receives the ejection pressure of the contrast medium so that the contrast agent can be ejected evenly to the internal organ. It is.

The display unit 30 is made of a radioactive non-transparent material such as platinum or lead in the form of a ring fixed as a fixed interval between the inner tube 4 and the shape retainer 8 as shown in Figure 4, such a display unit 30 Is a member provided to measure the exact length of the lesion under irradiation and provide a suitable stent.

And one side of the connector 16 is provided with a locking member 34 to fix the inserted state of the guide wire (6) installed to be movable along the inside of the inner tube (4).

The locking member 34 is a member that fixes the guide wire 6 inserted into the internal body of the human body in a crimping manner so as to maintain the inserted state.

5 and 6 are partially enlarged cross-sectional views showing the use of the catheter of the present invention as described above. First, the patient's esophagus in a state in which the outermost part 2 and the distal end portion of the inner tube 4 and the guide wire 6 are substantially matched. Insert into the stomach 100 through.

Insertion of such a catheter proceeds in the state of radiation to see the patient's internal organs and the inserted catheter, the catheter is inserted by a certain length to reach the end of the stomach 100 inside the duodenum 200 When approaching the vicinity of the part 210, while holding the connector 14 with one hand and pulling out the handle part 24 with the other hand, the adjustment member 22 connected to this handle part 24 is external to the exterior (2). The elastic body 20 provided at the tip end of the exterior 2 is bent with a constant radius of curvature while the portion drawn out by the shaft is shortened.

The adjustment of the adjustment member 22 is performed until the tip of the catheter is directed toward the inlet 210 of the duodenum 200, and when the tip of the catheter is positioned to a desired position, the locking member 26 is used to adjust the adjustment member 22. Fix the condition of

Then, the guide wire 6 is inserted along the inlet 210 of the duodenum 200 to a portion estimated to be a lesion inside the duodenum 200, and the inserted guide wire 6 is fixed with the locking member 34. After pushing the inner tube 4, the inner tube 4 is easily inserted into the duodenum 200 along the inserted guide 6 wire.

When the inner tube 4 is inserted into the duodenum, the contrast agent 300 is injected into the injector 32 through the port 12 of the connector 16 installed at the rear end of the inner tube 4. As shown in Figure 6 is discharged to the duodenum 200 through the contrast agent outlet 28 formed in the distal end of the inner tube (4).

The jet of the contrast medium 300 is a lot of contrast medium ejection opening 28 in the distal end of the inner tube (4), and the contrast medium outlet 28 is gradually drilled toward the rear end of the inner tube (4) of the contrast medium (300) The ejection pressure acts evenly so that the contrast agent 300 can be ejected evenly to the internal organs.

The injection of the contrast agent 300 is injected until all of the portions presumed to be lesions are filled, and when the contrast is injected in the state where the contrast agent 300 is injected, the lesion is caused by the contrast agent 300 made of a radiopaque material. In addition to being able to determine the exact position and size of the inner tube 4, it is possible to measure the exact length of the lesion through the display portion 30 fixed at regular intervals inside the distal end of the inner tube (4).

As described above, when the position, size, and length of the lesion are measured, the locking member 34 holding the guide wire 6 is released, and then the guide wire 6 is pulled out of the body and a stent insertion device can be inserted therein. Insert another guide wire into the inner tube (4).

Then, the inner tube (4) and the exterior (2) are pulled out of the patient's body, and a stent suitable for the size and length of the lesion is selected and mounted on the stent insertion device, and the stent insertion device is guided in advance. Insert the stent to the lesion by inserting it with the guidance of the wire.

In the above embodiment, the catheter applied to the stomach or duodenum has been described as an example, but the present invention is not limited thereto, and the catheter of the present invention may be used even when the stent is inserted into the narrowed blood vessel.

As described above, the present invention allows the user to arbitrarily adjust the bending degree and direction of the exterior tip portion from the outside, so that the inner tube can be easily inserted in the direction of the duodenum entrance, and the contrast agent ejection port and the display portion are formed at the tip of the inner tube to form the stomach or duodenum The location, size, and length of the lesion can be accurately measured to provide a catheter suitable for the lesion.

In addition, it is possible to shorten the two-stage procedure of replacing with another catheter to measure lesions and removing the guide wire for adding contrast medium after catheter replacement.

Claims (11)

An appearance having flexibility and maintaining openings on both sides while maintaining a constant shape; An inner tube movably inserted into the exterior and having a constant elastic force to maintain its shape; A guide wire movably inserted into the inner tube, having a self-elastic force, and guiding the inner tube into the lesion; Provided to the outer appearance, the user can freely bend the outer end portion according to the degree of bending of the engine so that when inserting the appearance into the interior of the human organs, it can be easily inserted toward the entrance when the bending direction of the human organs is different Catheter comprising a deflection control means for. The method according to claim 1, wherein the bending control means is fixed to the outside of the front end portion of the exterior, and the elastic body that can be returned to its original state with its own elasticity while preventing the exterior from being distorted when the exterior is bent; One side is connected to the front end of the elastic body and the other side is exposed to the outside through a port extending from the connector connected to the rear end of the catheter consisting of a control member for the user to arbitrarily adjust the degree of bending of the exterior end. The catheter according to claim 2, wherein one side of the adjusting member is provided with a handle portion for holding by the user so as not to insert the adjusting member into the inner tube and to easily adjust the adjusting member. The catheter of claim 2, wherein one or two or more adjustment members are provided to freely rotate the front end portion in all directions. The catheter according to claim 1 or 2, wherein one side of the exterior is provided with a locking member for locking the position of the control member in a controlled state. The method according to claim 1, wherein the inner tube maintains the shape of the inner tube in the longitudinal direction of the inner tube, and when the inner tube is inserted into the internal organ while preventing the inner tube from bending at the same time while pushing the force to the tip of the inner tube A catheter provided with a shape retainer which ensures reliable operation. The catheter of claim 6, wherein the shape retainer is formed of an elastic member having a coil shape having a predetermined elastic force. The catheter of claim 6, wherein the shape retaining member is formed at an entire length along an inner side of the inner tube and protrudes a predetermined length from the tip of the inner tube, thereby sliding smoothly at the wall of the trachea and smoothly bent at the same time. The catheter according to claim 1, wherein a plurality of contrast agent ejection openings are formed at the distal end of the inner tube so that the contrast agent injected from the outside is ejected to the internal organ to measure the position and size of the lesion. The method of claim 9, wherein when the contrast agent is injected through the inner tube, it is drilled a lot in the front end portion of the inner tube that is less ejection pressure of the contrast agent, and gradually drilled to the rear end of the inner tube that is much ejection pressure of the contrast agent Catheter, which allows the contrast medium to be evenly ejected to the internal organs. The catheter of claim 1, wherein the distal end portion of the inner tube is formed with a display portion made of a radiopaque material so as to measure the length of the lesion.