KR20130143314A - Medical catheter tube - Google Patents

Abstract

The present invention relates to a medical catheter tube which is capable of improving the flexibility of a tube leading end. The medical catheter tube comprises: a body unit (120) in which reinforcing members (110) are inserted along the longitudinal direction of the body; and grooves (130) which are penetrated on the outer circumference of a leading end of the body unit (120). The reinforcing members (110) are equipped except in the groove (130) sections so that the proximal end of the catheter can have a relatively upright structure, but the leading end part can be flexibly tilted towards the tilting direction.

Description

Medical catheter tube

The present invention relates to a medical catheter tube, and more particularly to a medical catheter tube that can improve the flexibility of the tube tip.

A catheter is a device collectively referred to as a medical device that is directly inserted into a body. Various catheters are used for insertion of the body, such as a blood vessel, a coronary artery, a urethral, a pneumatic, or a laparoscopic surgical catheter.

Such a catheter must be precisely inserted through a blood vessel, urethra, airway, etc., and must be finely adjusted because of its fine adjustment, and many improvements are required from the viewpoint of convenience of operation, accuracy, and stability. In addition, various catheters have been developed in the field of cardiovascular therapy such as cerebral blood vessels, stroke due to occlusion of coronary arteries, acute myocardial infarction, and cardiac arrest, and angioplasty procedures using the same have been developed.

In recent years, the catheter which can operate the entry direction to a body cavity by bending a distal end is provided.

For example, Japanese Patent Laid-Open No. 10-2011-0139698 (published date: 2011.12.29) (hereinafter referred to as "prior art document") discloses a catheter and a method for producing a catheter.

The prior art document shows a catheter in which a distal end of the tubular body is bent by providing a through wire (manipulation line) having a predetermined rigidity in the catheter body (tubular body).

In this way, the catheter in recent years is able to adjust the distal end of the catheter by the operation line, it is possible to enter the catheter itself into the body cavity. However, in order to accurately insert the catheter into the target site in a vascular system having a thin and complicated pattern, the catheter is required for flexibility, positioning, pressure resistance, and rigidity.

That is, when the operator manipulates the catheter, one of the characteristics required for the catheter in order for the operator's manipulation to be surely transferred from the base to the tip portion requires the characteristic that the catheter does not stretch. In addition, the torque transmission is required for the operator to accurately transmit the rotational force applied by the rotational operation of the catheter base to the catheter tip. In addition, indentation is required to ensure that the indentation manipulation force of the operator can be reliably transmitted from the proximal side to the distal side in order to advance the catheter in the blood vessel. In addition, the outer surface of the catheter should have affinity for blood vessels or tissues in the body.

In order to have these various properties, the catheter generally requires a relatively rigid base and a flexible structure at the tip.

The present invention is to provide a medical catheter tube that requires such a variety of characteristics, in particular to provide a medical catheter tube having a structure capable of more flexible tilting (tilting) in the tilting direction at the tip of the catheter.

Medical catheter tube according to the present invention for achieving this object is a hollow body portion is inserted into the reinforcing member along the longitudinal direction of the body, the groove is formed through the outer peripheral surface of the front end of the body portion is formed, the reinforcing member is It is achieved by being provided except the section of the recess.

Preferably in the present invention, the groove portion is characterized in that two or more along the longitudinal direction of the body portion.

Preferably, in the present invention, the recess is characterized in that the direction perpendicular to the central axis of the body portion.

More preferably, in the present invention, the groove portion is characterized by consisting of two or more groups of grooves (group) having a different phase.

More preferably, in the present invention, the groove groups are rotationally symmetric about a central axis of the body portion, and the arc angles of the groove groups having different phases are more than 180 °. It is characterized by a small one.

Medical catheter tube according to the present invention, the body portion is provided with a reinforcing member along the longitudinal direction, provided with a groove portion formed through the outer peripheral surface of the front end of the body portion is formed in the groove portion is excluded from the reinforcement member, the catheter base is relatively rigid structure On the other hand, in the tip portion there is an effect capable of more flexible tilting in the tilting direction.

Figure 1 (a) (b) is a view showing a medical catheter tube according to the present invention,
Figure 2 is a perspective view of the base of the medical catheter tube cut in accordance with the present invention,
3 is a view showing an operation example of the medical catheter tube according to FIG.
Figure 4 is a view showing the main configuration of the medical catheter tube according to another embodiment of the present invention,
(A) (b) of FIG. 5 is a sectional view taken along line BB and CC of FIG. 4, respectively.
6 is a view showing the main configuration of the medical catheter tube according to another embodiment of the present invention,
7 (a) (b) (c) (d) are cross-sectional views of the DD line, the EE line, the FF line and the GG line of FIG. 6, respectively;
8 is a view showing the main configuration of the medical catheter tube according to another embodiment of the present invention.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. It is to be understood that the invention is not to be interpreted as limited to the embodiments set forth herein, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Meanwhile, in the present invention, the terms first and / or second etc. may be used to describe various components, but the components are not limited to the terms. The terms may be referred to as a second element only for the purpose of distinguishing one element from another, for example, to the extent that it does not depart from the scope of the invention in accordance with the concept of the present invention, Similarly, the second component may also be referred to as the first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that there may be other elements in between something to do. On the other hand, when it is mentioned that an element is "directly connected" or "directly contacted" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

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

Figure 1 (a) (b) is a view showing a medical catheter tube according to the present invention, (a) is a front configuration diagram, (b) is a cross-sectional view of the line A-A of (a).

Referring to Figure 1, the medical catheter tube of the present invention, a hollow body portion 120 is inserted into the reinforcing member along the longitudinal direction of the body, the groove portion formed through the outer peripheral surface of the front end of the body portion 120 ( 130 is formed, the reinforcing member is characterized in that provided except for the section (C1) of the groove portion (130).

The groove portion 130 may be provided in two or more along the longitudinal direction of the body portion, the groove portion 130 can increase the flexibility as the front end of the catheter tube, so that the precise direction steering during the catheter tube introduction process in the body cavity This is possible.

As illustrated in FIG. 1, the body portion 120 may be provided with a tilting wire 101 for tilting the tip portion, such that the tip portion may be tilted.

The tilting wire 101 is inserted into the body portion 120 so as to be slidable in a state where the tip is fixed adjacent to the tip portion of the body portion 120.

At this time, the groove portion 130 may be formed in the tilting direction in which the tilting is made by the operation of the tilting wire 120, more preferably is formed in a direction perpendicular to the central axis (CL) of the body portion.

Body portion 120 is made of a flexible tube of a synthetic resin material, or a braided coil spring or metal wire braid is inserted as a reinforcing member to maintain a suitable rigidity.

2 is a view showing the base cross-section of the catheter tube is inserted into the blade, body 120 is provided with a blade 121 is a metal wire braided as a core material, the synthetic resin layer 122 may be provided coated. .

Referring back to FIG. 1, in the present invention, the body portion 120 is a tip portion in which a coil spring or blade is inserted into the core material and a tilting operation is performed at the tip of the body portion to facilitate entry into the base C2 having the reinforcing member and the body cavity. (C1), wherein the tip portion (C1) can be secured by eliminating the reinforcing member, substantially the tip portion (C1) corresponds to the section in which the groove portion 130 is formed.

Referring to FIG. 3, when the catheter tube configured as described above pulls the tilting wire 101 from the base side, the tip of the tilting wire 101 is tilted in the fixed direction, and the tilting is performed. The groove portion 130 provided at the position where the tip of the dragon wire 120 is fixed is more flexible in the tilting direction, thereby enabling delicate tilting operations.

Meanwhile, in the catheter tube according to the present invention, the groove portion may be provided by two or more groove groups having different phases on the outer peripheral surface of the tip portion of the body portion. As a specific embodiment will be described with reference to the associated drawings. For reference, the following embodiments will be described with respect to the recessed portion of the main portion of the present invention, and thus the base structure of the catheter tube in which the recessed portion is not formed may be provided with a reinforcing member in the body portion in the same manner as in the above-described embodiment. Should be understood.

Figure 4 is a view showing the main configuration of the medical catheter tube according to another embodiment of the present invention, Figure 5 (a) (b) is a cross-sectional view of the line B-B and C-C of Figure 4, respectively.

4 and 5, the first groove 231 and the second groove 232 are alternately provided on the outer circumferential surface of the body portion 220 with a phase difference of 180 ° (ie, 180 ° rotational symmetry). Is showing.

This catheter tube is advantageous in the tilting operation of the catheter tube using two tilting wires.

That is, the tip portion of the body portion 220 can be tilted in both up and down directions by manipulating the first tilting wire 201 or the second tilting wire 202.

Preferably, the arc angle θ of the groove corresponding to each tilting wire is symmetrically provided around the tilting wire, and the arc angle θ is preferably not more than 180 °.

Referring to FIG. 5, the first recess 231 corresponding to the first tilting wire 201 is provided symmetrically about the first tilting wire 201, and the circle of the first recess 231 is provided. The whistle θ may have any angle below 180 °.

Similarly, the second tilting wire 222 has a vertically symmetrical structure with the first tilting wire 221, and the second recess 232 is formed in the same manner.

Referring to FIG. 4, since the arc angles of the first recess 231 and the second recess 232 have the angle of 180 ° or less, the first and second recesses 231 and 232 are disposed in the center line CL. It does not exceed (the ends of the first groove and the second groove has a predetermined length h), therefore, even if the front end portion of the body portion 220 is tilted, the change in the length of the body portion 220 does not occur.

For reference, when the arc angle of the grooves having different phase differences formed in the body portion 220 is 180 ° or more, a substantial length based on the center line of the body portion 220 in the process of the tip portion of the body portion 220 is tilted. Changes may occur and such length changes may be detrimental to the sophisticated manipulation of the catheter, as mentioned in the prior art. Therefore, in the present invention, it will be desirable to determine the shape of the grooves within the range where the length change does not occur with respect to the center line of the tube body in the tilting process by the grooves having different phase differences.

6 is a view showing the main configuration of the medical catheter tube according to another embodiment of the present invention, Figure 7 (a) (b) (c) (d) is a line DD, EE, FF of FIG. It is a cross section of the line and the GG line.

6 and 7, in the present embodiment, four recesses 331, 332, 333, 334 are 90 ° out of phase difference (ie, 90 ° rotational symmetry) on the outer peripheral surface of the front end of the body part 310. It shows that it can be prepared with.

Four tilting wires 301, 302, 303, 304 may be provided to correspond to the four recesses 331, 332, 333, 334, and thus, four tilting wires 301. By operating the 302, 303 and 304, the tip of the body 320 can be tilted in two directions x and y perpendicular to each other. At this time, each of the tilting wire is formed in the groove in the corresponding direction, the tilting operation in the direction can be made more flexible and fine.

On the other hand, if necessary, four grooves having a phase difference of 90 ° may be formed over a predetermined period by repeating the same pattern to form the groove portion.

Referring to FIG. 7, the first recess 331 corresponding to the first tilting wire 301 is provided symmetrically about the first tilting wire 301, and the circle of the first recess 331 is provided. The whistle θ may have any angle below 180 °.

As such, the four tilting wires are provided to be symmetrically rotated by 90 °, and each of the tilting wires has grooves formed of a plurality of grooves, so that precise tilting operations can be performed in two orthogonal directions.

8 is a view showing the main configuration of the medical catheter tube according to another embodiment of the present invention, showing a catheter tube structure having four tilting wires.

As compared with the embodiment of FIG. 6 having four tilting wires, the medical catheter tube according to the present embodiment has a phase difference of 90 ° from each other and four tilting wires are provided in the body 420 of FIG. Although the same as the embodiment, the groove portion corresponding to each tilting wire may be provided by forming a group of two first and second grooves 431a and 431b having the same phase. Therefore, two grooves form a group for each tilting wire, and four groove groups may be provided with a phase difference of 90 ° from each other.

It will be apparent that one groove group may be three or more by extending the same.

Such a medical catheter tube according to the present invention is provided with a recess on the outer peripheral surface of the front end of the hollow tube body portion, according to the shape or arrangement of the recess can improve the flexibility only by the simple structure of the tip, and also for tilting the catheter tube By the addition of the tilting wire, the entry operation of the catheter in the body cavity can be made more precisely and precisely by a more flexible tilting operation in the tilting direction.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

101: tilting wire 110: reinforcing member
120: body 130: groove

Claims (6)

A hollow body portion in which a reinforcing member is inserted along a longitudinal direction of the body, wherein a recess is formed through the outer peripheral surface of the front end of the body portion, and the reinforcing member is provided without a section of the recess. tube. The medical catheter tube according to claim 1, wherein the groove part has two or more along the longitudinal direction of the body part. The medical catheter tube according to claim 1, wherein the recess is perpendicular to the central axis of the body portion. The medical catheter tube according to any one of claims 1 to 3, wherein the groove part is composed of two or more groove groups having different phases. The medical catheter tube of claim 4, wherein the groups of grooves are rotationally symmetric about a central axis of the body portion. 6. A medical catheter tube according to claim 5, wherein the arc angles of the groove groups having different phases are smaller than 180 degrees.

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