KR101613269B1 - Delivery apparatus for medical instrument in blood vessel - Google Patents

Abstract

According to the present invention, an apparatus for transporting a medical member in blood vessels comprises: an entry induction pipe consisting of a flexible outer skin and an inner wire mesh, having a tube shape including an exit in which a lead wire is penetrated and discharged, and having a shape of which an outer diameter is narrowed from the end unit of the exit of the lead wire; and an entry wire having a flexible wire shape, connected to the end unit in the opposite direction of the exit of the entry induction pipe. According to the present invention, the apparatus for transporting a medical member is capable of reducing the damage to the blood vessels.

Description

TECHNICAL FIELD [0001] The present invention relates to an intra-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for delivering a medical member, and more particularly, to a device for delivering a medical member into a blood vessel.

If stenosis occurs in the blood vessels inside the body or if the blood vessels become narrowed for various reasons, the medical members for expanding the blood vessels, including the balloon and the stent, are moved and installed in the position of the affected vessel . In particular, angioplasty is widely used as an intervention for treating a narrowed blood vessel disease. Angioplasty involves delivering a balloon or stent, or balloon and stent, through a guide wire and catheter to the point where the problem occurs, and then dilating the balloon or stent to expand the vessel.

The cerebral artery located in the intracranium beyond the base of the skull has more flexion and complexity than other parts of the blood vessel. When performing angioplasty on a cerebral artery with such complex flexion, It is difficult to deliver a balloon or a stent at the same time because of its curved shape and complicated shape. In the case of a vessel having such complicated bending, it is difficult to deliver a balloon and a stent for angioplasty to a position (lesion) In the first case, the pathway was secured using a micro-catheter, and then an exchange procedure was performed to remove the micro-catheter and deliver the balloon and the stent. In the case of expansion surgery, a fine guidewire penetrating the interior of the microconduit is first used to pass the complicated bend Move the microconduits so that the microcavity and the fine guidewire are passed through the affected site (lesion), and the microcavity is removed leaving only the microcavity wire. After the balloon and stent are delivered to the lesion, the balloon and the stent are expanded to expand the blood vessel.

In this case, if a lesion occurs in a very severe vein such as a middle cerebral artery, the balloon and the stent can not be inserted immediately, and the microcavity is first inserted to secure the entry path to the lesion. A replacement process is required. However, in the process of removing the microconduits and inserting the balloons and stents again, there is a high possibility that the microconduits, balloons or stents break the blood vessels or cause injuries. In particular, in the case of the cerebral artery located in the intracranial space, such as the middle cerebral artery, vascular damage can be a great risk to the safety of the patient. In addition, there is a possibility that the inner wall of the blood vessel may be damaged in the process of entering the guide wire.

U.S. Patent No. US20130066413A1 relates to an aneurysm surgical apparatus, which is an aneurysmal surgical apparatus of the type comprising a transfer wire, a stent, an introducer and a microcatheter. U.S. Patent No. US20130066413A1 includes a microcatheter at the inlet end for smooth entry of the stent, but only a general microcatheter is provided, and contents for omitting the process of replacing the microcatheter and preventing damage to the inner wall of the vessel .

U.S. Patent US20130066413A1

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a method and apparatus for reducing the risk of vessel destruction caused by a replacement procedure of removing a microcontent and reinserting a balloon or a stent, And a medical member transferring apparatus.

The intra-vascular medical member transfer apparatus according to the present invention is composed of a flexible outer shell and an inner wire mesh (wire mesh), and has a tube shape including an outlet through which the lead wire passes and is discharged from the outlet end of the lead wire An entry guide tube having a shape in which an outer diameter is gradually narrowed and an entry wire having a flexible wire shape and connected to an end portion of the entry inducing tube opposite to the exit.

The entry induction tube may include a bend retention portion including an entry including a radiopaque material and an internal wire netting to prevent the inside diameter from becoming narrow. And, the inlet induction pipe can make the density of the inner wire net higher than the outlet end direction higher than the opposite end direction. In addition, the introduction induction pipe may further include an endothelium made of PTFE (Polytetrafluoroethylene) material to reduce the friction of the lead wire.

The apparatus for transferring members for intravascular medical devices according to the present invention can perform angioplasty without replacing the lead wires and the microconduits, thereby reducing the possibility of dangerous situations such as vessel breakage which may occur during the procedure. In addition, the medical device according to the present invention can reduce the burden on the patient by shortening the procedure time because there is no replacement process. In addition, it is possible to prevent the inner wall of the blood vessel from being damaged in the course of entering the guide wire.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing an embodiment of an intra-vascular medical member transfer apparatus according to the present invention. Fig.
FIG. 2 is a view showing the entrance guide tube 110 of the intra-vascular medical member transfer device according to the embodiment of the present invention.
FIG. 3A is a cross-sectional view taken along line AA of the entry induction pipe 110 according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along the BB line of the entry induction pipe 110.
FIG. 4 is a view showing an intra-vascular installation of an intra-vascular medical member transfer device according to an embodiment of the present invention.
5A and 5B are views showing a procedure of an angioplasty using an intra-vascular medical member transfer apparatus according to an embodiment of the present invention.
6 is a view showing a direction opposite to the exit of the introductory induction tube of the intra-vascular medical member transfer apparatus according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms and words used in the present specification are selected in consideration of the functions in the embodiments, and the meaning of the terms may vary depending on the intention or custom of the invention. Therefore, the terms used in the following embodiments are defined according to their definitions when they are specifically defined in this specification, and unless otherwise defined, they should be construed in a sense generally recognized by those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing an embodiment of an intra-vascular medical member transfer apparatus according to the present invention. Fig.

Referring to FIG. 1, an intra-vascular medical member transfer apparatus 100 according to the present invention includes an entrance induction tube 110 and an entry wire 120. The entrance induction pipe 110 and the entry wire 120 are connected to each other and can be integrally formed.

The introduction induction pipe 110 may be made of a flexible material so as to be able to effectively move in a blood vessel having complicated bending. The entrance induction pipe 110 is formed in a tube shape (tubular shape) through which the lead wire 10 can pass. The introduction induction tube 110 may be formed in a conical shape in which the stent is installed on the lesion and the outer diameter becomes wider toward the direction in which the stent is introduced into the blood vessel so as to be easily removed. That is, the entering direction of the entrance induction pipe 110 may be formed to be wider than the portion connected to the entry wire 120. The inner diameter of the end portion of the entrance induction pipe 110 in the direction opposite to the entry end, which has the smallest diameter, can be designed to be 0.014 cm in consideration of the outer diameter of the lead wire 10. In addition, the length of the entrance induction pipe 110 can be designed to be 5 cm or less. Generally, in the procedure, the entry induction tube 110 is inserted at a position a predetermined distance away from the lesion position, and a stent (or balloon) is inserted along the entry wire 120. In this process, if the length of the entry induction tube 110 is excessively long, it should be inserted deeper to secure the stent insertion space. In this case, it may be difficult to install the stent if the entrance guide tube 110 can not advance further. Therefore, the length of the entrance induction pipe 110 is preferably 5 cm or less.

The induction pipe 110 may be formed of a flexible outer jacket and an inner wire mesh. The inner wire mesh inside the entrance induction pipe 110 maintains the circular shape of the entrance induction pipe 110 in the curved blood vessel and prevents it from being bent. Since the entry induction tube 110 has a tubular shape of a flexible material, when passing through complicated bending in the blood vessel, excessive bending may cause the inside diameter to be narrowed or clogged. When the inside diameter of the entrance induction pipe 110 is narrowed or clogged, the inside of the blood vessel may be closed to obstruct blood flow.

The inner wire mesh maintains the circular shape of the induction pipe 110 even in complicated bending in the blood vessel, thereby preventing the inner diameter from being narrowed or clogged by the bending. And, the inner wire mesh can control the flexibility by adjusting density (number of strands) of wire mesh structure. The inner wire mesh at the outlet of the entrance induction pipe 110 has a density of the wire mesh structure that is relatively narrow compared to the opposite direction so that the wire mesh is dense and the gap is relatively wider as it moves toward the opposite end of the outlet. You can do it differently. If the flexibility of the entry induction pipe 110 in the entry direction is high when the entrance induction pipe 110 moves inside the blood vessel by the movement of the entrance entrance pipe 110, the force is not sufficiently transmitted to the entrance direction of the entrance induction pipe 110, There may be difficulties in. Accordingly, the density of the inner wire net on the entry side of the entrance induction pipe 110 is increased, so that the entrance induction pipe 110 can effectively move the blood vessel.

Further, in order to reduce the friction with the lead wire inside the entry induction pipe 110, it is possible to further form an inner skin with a material having a low friction coefficient. An inner skin of PTFE (Polytetrafluoroethylene) such as Teflon is formed on the inner side of the entrance induction pipe 110 so that the guide wire can be more easily moved to the lesion. At the end of the entry induction pipe 110 in the entering direction, the radiopaque material may be indicated by a radiation identifier. The position and movement of the intra-vascular medical member transfer apparatus 100 is detected through a radiation identifier displayed on the entrance induction pipe 110 when the intravascular medical member transfer apparatus 100 enters and moves into the blood vessel, And thus it is possible to perform more accurate operations when performing angioplasty.

The entry wire 120 is connected to the entry end of the entry induction pipe 110 in the opposite direction, and may have the form of a flexible wire. The entry wire 120 can be designed to have the same diameter and length as the commonly used lead wire 10. In order to effectively transmit the force to the entry induction pipe 110 in the course of entering the blood vessel, the lead wire portion, which is conventionally used, prevents the damage of the inner wall of the blood vessel during the change of direction in the cerebral blood vessel, A portion of the distal end of the wire (about 3 cm) should be strong enough to maintain good flexibility (the extent to which the blood vessel is bent when it touches the inner wall). On the other hand, the softness of the 3 cm portion has the advantage of minimizing the damage of the inner wall, but it has a disadvantage in that the strength and the supporting force are deteriorated. This makes it difficult for the balloon and stent catheter to move distally to the vessel. The present invention replaces the end portion of a conventional wire with a microconduit that has a thickness or diameter of less than 0.005 inches wrapped in a lattice or spring shape between the conduit endothelium and the sheath of 1.7 F or more. Connect the proximal portion of the replaced microcavity with a wire similar to the strength of the underlying portion of the flexible lead-wire with 3 cm distal end removed (a slight extension of the cerebral blood vessels). This enhances bearing capacity and helps delivery of the balloon and stent catheter to the distal portion.

The intra-vascular medical member transfer apparatus 100 according to the present invention moves along the lead wire 10 into the blood vessel from the entry induction tube 110 and moves in the blood vessel according to the force transmitted through the entry wire 120 May be installed through the lesion site.

Anatomically, the cerebral arteries that branch from the ascending aorta into the cerebral cortex extend through the Base of Skull, the internal carotid artery located in the intracranium, the vertebral artery, and the intracranial internal carotid artery Cerebral vessels such as the distal, middle cerebral arteries, and basal arteries not only have a relatively narrow inner diameter of the blood vessels, but also have a very complicated curvature. Conventional general medical member transfer devices such as a catheter are difficult to transfer the vasodilating mechanism such as a stent or a balloon to a lesion in a blood vessel at once because of the bending of the blood vessel in the case of a lesion occurring in a complicated blood vessel as described above. For the procedure for inserting the stent and balloon, a guidewire is required to guide these devices to the lesion vessel. The guidewire has to pass through the complicated and curved cerebral vessels to pass through the lesion, but the distal end of the guidewire is flexible and has a very thin diameter, which can lead to the clinician failing to advance and being twisted have. Thus, the guidewire uses a microcatheter together to increase directional transfer and distal delivery to the bending vessel. In addition, a guide wire (190 ~ 205cm), which is relatively short in length, is primarily used to sufficiently transmit the rotational force and the turning force of the guide wire within 150cm of the micro catheter. After the guide wire passes through the lesion, In order to easily transfer and install the catheter, a guide wire having a high strength is replaced (300 cm).

Conventional procedures first place a microcatheter (catheter) under the lead of a primary fine wire (typically 205 cm long) in a position past the lesion. Then, after removing the first fine wire, a second fine wire (generally having a length of 300 cm) is inserted, and the fine catheter is again removed. Next, after removal of the microcatheter, the lesion can be expanded by inserting a balloon catheter or stent catheter into the lesion. The reason for replacing the microcatheter is that it is technically difficult to insert the balloon catheter or stent catheter into the inside of the small catheter even if the outer diameter of the balloon catheter or stent catheter is small. Therefore, to approach the balloon catheter (or stent catheter) This is because we have to.

In this way, during the exchange of the guide wire and the microcatheter, there is a risk of damaging the blood vessel. Particularly, there is a risk that the guide wire remaining in the blood vessel moves in the blood vessel while the micro catheter is replaced while leaving only the guide wire, and the end of the guide wire may puncture the blood vessel and damage the inner wall of the blood vessel.

However, in the intra-vascular medical member transfer apparatus 100 according to the present invention, the lead wire 10 enters the blood vessel, and during the process of transferring the balloon or the stent, The balloon or stent may be delivered to the entry wire 120 used to enter the medical member transfer apparatus 100. [ The procedure of using the intra-vascular medical member transfer apparatus 100 according to the present invention will be further described with reference to FIGS. 5A and 5B to be described later.

FIG. 2 is a view showing the entrance guide tube 110 of the intra-vascular medical member transfer device according to the embodiment of the present invention.

1 and 2, the introduction induction tube 110 of the intra-vascular medical member transfer apparatus 100 according to an embodiment of the present invention includes an entry part 111, a bending part 112, and a connection part 113 ).

The entry part 111 corresponds to the exit direction of the entrance induction pipe 110 and the bending holding part 112 has a shape extending from the entry part 111 and is connected to the entrance connection part 120. The entry unit 111 may be made of a material having a relatively higher strength than the bending holding unit 112 to help the entry induction tube 110 enter and move into the blood vessel along the lead wire 10 .

In addition, the entry portion 111 may comprise a radiopaque material such as platinum or gold. Since the entry section 111 including the radiopaque material can serve as a radiopaque indicator, when the intra-vascular medical member transfer apparatus 100 enters and moves into the blood vessel, the intra-vascular medical member transfer apparatus 100 can be more reliably observed through a radiation observation apparatus such as an X-ray. Therefore, when performing angioplasty, more accurate operation is possible through accurate observation. The entry portion 111 may be made entirely of a radiopaque material, or only a part of the entry portion 111 may be made of a radiopaque material.

The entry portion 111 and the bending portion 112 constituting the entry induction pipe 110 may all be made of a flexible material and include a space through which the lead wire 10 can pass . The entry unit 111 and the bending holding unit 112 may be formed of a sheath, an inner wire netting, and an inner sheet. The entry induction tube 110 including the entry part 111 and the bending part 112 passes through the inner carotid artery, the vertebral artery and the cranial cavity, which are located in the intracranium through the base of the skull. It is flexible enough to pass through vessels with narrow internal diameters and complex curvatures, such as cerebral vessels such as the distal internal carotid artery surrounding the cerebrum, the middle cerebral artery, and the basilar artery. In particular, it can be designed to have as much flexibility as existing microcatheters.

The outer skin can be coated with a hydrophilic coating on the surfaces of the entry portion 111 and the bending portion 112 to reduce the frictional force and smooth movement in the blood vessel. The inner wire mesh is located between the outer skin and the inner skin, and maintains the circular shape of the induction pipe 110 in the curved blood vessel and prevents it from being bent. Since the entry induction tube 110 has a tubular shape of a flexible material, when passing through complicated bending in the blood vessel, excessive bending may cause the inside diameter to be narrowed or clogged. If the inside diameter of the entry induction tube 110 is narrowed or clogged, the guide wire may fail to move to the lesion. The inner wire mesh maintains the circular shape of the induction pipe 110 even in complicated bending in the blood vessel, thereby preventing the inner diameter from being narrowed or clogged.

The inner pipe is a material having a small coefficient of friction added to the inner surface of the entrance induction pipe 110 to reduce friction with the guide wire. An inner skin of PTFE (Polytetrafluoroethylene) such as Teflon is formed on the inner side of the entrance induction pipe 110 so that the guide wire can be more easily moved to the lesion.

The entry induction tube 110 including the entry section 111 and the bending holding section 112 is located through the lesion. However, since the internal diameter of the lesion performing the angioplasty procedure is narrower than that of the surrounding blood vessel, the stent or the balloon is extended from the lesion site, and then the intravascular medical member transfer device 100 is removed from the blood vessel. 110) may be difficult to pass through the stent. The outer diameter of the entrance induction pipe 110 is formed to be smaller than the outer diameter of the bend retaining portion 110 connected to the entry connection portion 120 from the entry portion 111 located at the exit end 112 may have a shape in which the diameter gradually decreases. In addition, the entrance induction pipe 110 has a shape in which the diameter is narrowed in a certain form from the outlet end, but also a shape in which the diameter of the gentle slope from the outlet end is narrowed and the diameter of the slope is rapidly narrowed at a predetermined point in the middle, It may have a shape that narrows down to a step.

The connecting portion 113 located at the inlet end of the bending holding portion 112 connects the inlet induction pipe 110 and the entry wire 120. After the stent and the balloon are installed, the connection portion 113 may have a conical shape that narrows in order to facilitate the removal of the stent and the balloon. The in-vascular medical member transfer apparatus 100 passes the lesion position, and the stent / balloon is placed at the lesion position by the lead wire 10. [ Since the intravascular medical device feeding apparatus 100 is removed after the stent / balloon is installed at the lesion position, it can be easily removed through the conical shape in which the diameter of the entrance end of the connecting portion 113 is gradually narrowed.

The densities of the inner wire mesh of the entry part 111 and the bending holding part 112 can be different from each other. The inner wire mesh can vary the degree of flexibility by controlling the density of the wire mesh spacing. High flexibility may be advantageous for efficient movement of complexly curved blood vessels, but when the flexibility is high, force is not sufficiently transmitted and it may be disadvantageous to movement in the blood vessel. Therefore, the density of the inner wire mesh in the entry unit 111 moving at the front is relatively increased, so that the force can be transmitted more effectively. Conversely, the bend retention portion 112 can relatively reduce the density of the inner wire netting, thereby making it possible to move without causing damage to the blood vessel even in complicated blood vessel bending.

FIG. 3A is a cross-sectional view taken along line AA of the entry induction pipe 110 according to an embodiment of the present invention, and FIG. 3B is a cross-sectional view taken along the BB line of the entry induction pipe 110.

Referring to FIGS. 1, 3A and 3B, the entrance induction pipe 110 according to an embodiment of the present invention may include an outer shell 301, an inner wire net 302, and an inner skin 303.

The envelope 301 constitutes the surface of the entry induction pipe 110 and may be made of a material having flexibility such as nylon. The flexibility of the shell 301 can be controlled by the hardness of the material and can have different flexibility for each section of the entry induction pipe 110. [ In addition, the outer cover 301 may be coated with a hydrophilic coating to reduce the frictional force and smooth movement in the blood vessel.

The inner wire net 302 is positioned between the outer shell 301 and the inner shell 303 and maintains the circular shape of the induction pipe 110 in a curved blood vessel and prevents it from being bent. Since the entry induction tube 110 has a tubular shape of a flexible material, when passing through complicated bending in the blood vessel, excessive bending may cause the inside diameter to become narrow or clogged. If the inside diameter of the entry induction tube 110 is narrowed or clogged, the guide wire may fail to move to the lesion. The inner wire net 302 maintains the circular shape of the induction pipe 110 even in complicated bending in the blood vessel, thereby preventing the inner diameter from being narrowed or clogged. The inner wire mesh 302 can control the flexibility by adjusting the number and density of strands of the wire mesh structure. The inner wire net 302 in the direction of the outlet end of the entrance induction pipe 110 is configured such that the density of the wire net structure is relatively high compared to the opposite direction to make the net dense and the density moves relatively to the opposite end of the outlet The degree of flexibility can be made higher than that of the opposite side. When the inlet induction pipe 110 is flexible in the inlet direction of the inlet induction pipe 110 when the insides of the inlet induction pipe 110 move inside the blood vessel along the wire 10, Therefore, there may be difficulties in moving. Accordingly, the density of the inner wire net 302 on the inlet side of the entrance induction pipe 110 is increased, so that the entrance induction pipe 110 can effectively move the blood vessel.

The inner film 303 may be formed of a material having a small coefficient of friction added to the inner surface of the entry induction pipe 110 to reduce friction with the lead wire 10. The endothelium (303) is made of PTFE (Polytetrafluoroethylene) such as Teflon to allow the guide wire to move to the lesion more easily.

FIG. 4 is a view showing an intra-vascular installation of an intra-vascular medical member transfer device according to an embodiment of the present invention.

Referring to FIGS. 1 and 4, an example of a vascular installation using an intra-vascular medical member transfer device according to an embodiment of the present invention shows a stent installation procedure for a patient who has stenosis in the middle cerebral artery. The middle cerebral artery is the most frequently occluded artery by cerebrovascular disease, and it supplies blood to most parts of the basal ganglia and inner sac of the inner lateral aspect. The middle cerebral artery is located in the dura that surrounds the cerebrum through the cranial base, which is branched from the ascending aorta and ascends toward the cerebrum.

In the case of stenosis of the middle cerebral artery, the middle cerebral artery has complicated bending as shown in the drawing, and the conventional angioplasty procedure has a complicated procedure because the travel distance for entry of the catheter into the stenotic lesion 411 is far. In the case of a blood vessel having such a complicated bend, it is difficult to deliver a medical member including a balloon for treatment and a stent to the stricture lesion 411. As an example, in the conventional procedure, a 205 cm guide wire and a microconduit are used to secure the path, and then the 205 cm guide wire is removed with the microconduit left. Then, after inserting a 300 cm guide wire through the remaining microcavity, the microcavity is removed. Next, a stent or a balloon is inserted along the 300-cm guidewire to install it in the stricture lesion 411. However, if the guidewire existing in the blood vessel without the microcautery is moved during the insertion of the stent 412 in such a replacement process, the inner wall of the blood vessel may be damaged. Particularly, since the entrance portion of the guide wire has a conical shape for ease of insertion, even if the guidewire moves only 2-3 mm in the cerebral blood vessel, the inner wall of the blood vessel can be greatly damaged.

In contrast, according to the present invention, in the intra-vascular medical member transfer apparatus 100 according to the present invention, when the lead wire 10 is guided, the entry induction tube 110 moves the stenotic lesion 411 a predetermined distance (410). When the intrave- nous medical-member-member transferring apparatus 100 is positioned in the blood vessel, the lead wire 10 is removed. The medical member including the stent 412, through the entry wire 120 of the intra- Is inserted into the blood vessel and expanded in the stricture lesion 411 to expand the blood vessel 420 (420). When the stent is installed in the stricture lesion 411, the in-vascular medical member transfer apparatus 100 is removed from the blood vessel and the procedure is terminated. As described above, since the intravenous medical member transferring apparatus 100 according to the present invention does not require a replacement process and the entrance guide tube 110 remains in the blood vessel together with the entry wire 120, It is possible to prevent the problem of damaging the inner wall of the blood vessel within the blood vessel.

5A and 5B are views showing a procedure of an angioplasty using an intra-vascular medical member transfer apparatus according to an embodiment of the present invention.

Referring to FIGS. 5A and 5B, the procedure of the angioplasty using the intra-vascular medical member transfer apparatus 100 according to an embodiment of the present invention can be divided into six stages. First, a stenosis lesion 511 is identified in the cerebral artery (510). Then, the intravascular medical member transferring apparatus 100 is moved to the intravascular narrowing lesion 511 using the lead wire 10 (520). In the course of moving the intravascular medical member transfer apparatus 100 to the stenosis lesion 511 through the lead wire 10, the stent catheter is positioned in the stenosis lesion, Place it a little bit late. When the intravascular medical device feeding apparatus 100 is located in the stricture lesion 511, the lead wire 10 is removed (530). In the present invention, the lead wire 10 is removed in a state in which the in-vascular medical member transfer apparatus 100 is left, a wire connection process of 300 cm is omitted, a soft conduit type induction pipe 110, Therefore, the inner wall of the blood vessel is not damaged. Then, the stent 541 is inserted into the blood vessel along the entry wire 120 of the intra-vascular medical member transfer apparatus 100 and placed in the stricture lesion 511 (540). When the stent 541 is located in the stenosis lesion 511 along the entry induction tube 110, the stent 541 is expanded to expand the stenosis lesion 511 (550). Then, the in-vascular medical member transfer apparatus 100 is removed from the blood vessel (560). 1, in the case of designing the entrance induction pipe 110 in a form of a gentle slope and a steep slope, the entrance guide pipe 100 may be inserted in the process of removing the intravascular medical member transfer device 100 from the blood vessel, It may be advantageous to pass through the tent 541.

In steps 530 and 540 of the angioplasty procedure using the intra-vascular medical member transfer apparatus 100 according to the present invention, since only the lead wire 10 is removed and the stent 541 is inserted, And it is possible to prevent the risk that the entrance induction pipe 110 remains in the blood vessel and damages the inner wall of the blood vessel.

6 is a view showing a direction opposite to the exit of the introductory induction tube of the intra-vascular medical member transfer apparatus according to the embodiment of the present invention.

Referring to FIG. 6, the introduction induction pipe 610 of the intra-vascular medical member transfer device according to the present invention has a shape in which the outer diameter gradually decreases from the direction of the exit to the direction opposite to the exit. The entrance (in the direction opposite to the exit) end of the entry inducing pipe 610 through which the lead wire 10 enters may have the form of a joining portion 611. The joint portion 611 is located at the end opposite to the exit of the entrance induction pipe 610 and has a shape of a barrier that blocks the end portion opposite the exit end and has a resilient material capable of contracting and expanding. The joining portion 611 has a hole (entrance) in the form of a sheath in which the lead wire 10 can enter at the center. The inner diameter D of the hole of the bonding portion 611 may be 0.0018 inches or less and the hole of the bonding portion 611 is expanded by elasticity when the lead wire 10 is inserted, .

In step 560 of FIG. 5B, if the entry guide tube 610 is not blocked by the joint 611 in the course of removing the entry guide tube 610, the distal portion of the stent 541 The entry guide tube 610 may be caught in the stent strut, so that it may be difficult to remove or the stent 541 may be damaged. In the present invention, the junction 611 of the entrance induction pipe 610 can prevent the entrance induction pipe 610 from being caught by the structure (stent strut) of the stent 541.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is possible.

100: intravenous medical member transfer device
110: Entry induction tube
111:
112:
113:
120: entry wire
411: stenosis lesion
541: stent
610:

Claims (8)

A transfer device for transferring a medical member to a lesion by a lead wire passing through the inside,
A flexible wire having a tubular shape including an outer sheath and an inner wire mesh and having an outlet through which the lead wire is discharged and discharged and having an outer diameter narrowing in two stages from an outlet end of the lead wire, An inlet induction pipe having an inlet; And
An entry wire having a flexible wire form and connected to an end of the entry induction pipe opposite to the exit;
And an in-vascular medical-member transferring device. The method according to claim 1,
The entry guide tube
An entry comprising a radiopaque material; And
A bending retaining portion including an inner wire net to prevent the inner diameter from being narrowed;
And an in-vascular medical-member transferring device. 3. The method of claim 2,
Wherein the entrance induction pipe makes the density of the inner wire net higher than the direction of the outlet end in the opposite end direction. 3. The method of claim 2,
Wherein the entry induction tube further comprises an endothelium made of PTFE (Polytetrafluoroethylene) material to reduce the friction between the lead wire and the lead wire. The method according to claim 1,
Wherein the in-vascular medical member transfer device extends a blood vessel of a cerebral artery located in the cranial cavity. The method according to claim 1,
Wherein the entry wire moves the stent or balloon to an intra-vascular lesion location. The method according to claim 1,
Wherein the entry induction tube includes a conical connection portion connecting the entry wire and the entry induction tube. The method according to claim 1,
A joining portion located at the end opposite to the exit of the entrance induction pipe and blocking the entrance induction pipe and having a sheath hole at the center thereof;
Further comprising: an in-vascular medical member transferring device for transferring the in-vascular device.

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