Balloon catheter for removing micro-catheter

Abstract

The present invention relates to a balloon catheter for removing a micro-catheter, the balloon catheter comprising: a balloon which is inflated or deflated while being disposed between the inner wall of a guiding catheter and a guide wire through a passage formed between the guiding catheter inserted into a lumen and a micro-catheter inserted into the guiding catheter so as to movably support the guide wire facing a lesion target; a balloon catheter main body which is provided with a fluid discharge hole for discharging a fluid for inflating the balloon, and a fluid flow path for guiding the flow of the fluid to the fluid discharge hole, and which supports one side of the balloon and enables the extraction and insertion of the balloon from / into the inner side of the guiding catheter through the passage; and a balloon support rod which is provided with a protruding portion protruding from the fluid discharge hole, and which is inserted into the flow path of the balloon catheter main body so as to support the other side of the balloon on the protruding portion.

Description

Balloon catheter for microcatheter removal

[0001] The present invention relates to a balloon catheter for microcatheter removal.

[0002] A CTO lesion (Chronic Total Occlusion Lesion) refers to a blood vessel that has been blocked for a long time.

[0003] In particular, because it is an organ that is anatomically important to the human body, it is characterized by high risk and difficulty of the procedure, and the success rate is lower than that of other procedures.

[0004] Because the intervention procedure takes a long time, it is a procedure that is highly dependent on various surgical tools and the skill and technique of the practitioner.

[0005] In the case of CTO lesion treatment, which is an old lesion and has progressed firmly, there is a problem in that a guide wire with a diameter of 0.014 inches cannot easily enter the lesion.

[0006] Therefore, various instruments are required to successfully treat CTO lesions.

[0007] Among these, the additional use of a micro-catheter improves backup support during the procedure, helping the guide wire enter a solid CTO lesion and increasing the success rate of the procedure.

[0008] And, once the guide wire has passed through the CTO lesion, the microcatheter should be safely removed from the introducer sheath, leaving the guide wire in place for subsequent procedures.

[0009] However, when safely removing only the microcatheter from the guide wire and guiding catheter while leaving the guide wire that passed through the CTO lesion, there is a problem in that although the microcatheter is withdrawn from the inside of the guiding catheter as much as possible, the microcatheter cannot be safely removed due to the difference in length between it and the guiding catheter, and the procedure time is also required.

[0010] For example, in order to improve back-up support when treating chronic occlusive lesions, a microcatheter is often used together with a guide wire, and once the lesion is passed, the microcatheter must be safely removed from the body while maintaining the guide wire that has reached the distal part of the coronary artery.

[0011] However, if the difference in length between a microcatheter of 130 to 150 cm in length and a guide wire of 180 to 190 cm in length is the minimum guide tube length (100 cm), it can be safely removed from the body. However, since the difference in length of the devices used clinically is only 50 to 60 cm, it cannot be safely removed.

[0012] In this situation, if you continue to attempt to remove the microcatheter, the guide wire may not remain securely in the distal coronary artery and may dislodge along with the microcatheter. Attempting to re-enter the lesion at this point could cause a major injury to the coronary artery intima, which was previously slightly damaged by the guide wire insertion, potentially leading to serious complications.

[0013] The present invention is intended to solve the above-mentioned problems, and the purpose of the invention is to provide a balloon catheter for microcatheter removal, which can easily and safely remove the microcatheter from the guide tube while leaving the guide wire and guide tube behind, and can shorten the procedure time, in a procedure using a microcatheter.

[0014] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0015] The object of the present invention can be achieved by a balloon catheter for microcatheter removal, which comprises: a balloon that is positioned between an inner wall of the guide tube and the guide wire through a passage formed between an introductory tube inserted into a lumen and a microcatheter that movably supports a guide wire inserted into the guide tube and directed toward a lesion target, and that expands or contracts; a balloon catheter body having a fluid discharge hole through which fluid for inflating the balloon is discharged and a fluid flow path that guides the flow of fluid to the fluid discharge hole, the balloon catheter body supporting one side of the balloon and allowing the balloon to be drawn into and out of the inside of the guide tube through the passage; and a balloon support rod having a protrusion protruding from the fluid discharge hole and being inserted into the flow path of the balloon catheter body, the balloon support rod supporting the other side of the balloon to one side of the protrusion.

[0016] When the balloon is placed between the inner wall of the guide tube and the guide wire and inflated, the balloon can tightly fix the guide wire to the inner wall of the guide tube.

[0017] The maximum outer diameter of the deflated balloon may be smaller than the gap of the passage.

[0018] As an example, the balloon may further include a pair of markers spaced apart from the protrusions accommodated in the balloon to indicate the position of the balloon.

[0019] As another example, the balloon may further include a marker corresponding to the length of the balloon and provided on a protrusion accommodated in the balloon to indicate the position of the balloon.

[0020] The above balloon may comprise an inflatable and deflating rubber or silicone material.

[0021] According to the present invention, the operator and the surgical support team (radiologists, nurses, clinical pathologists) can operate the equipment simply and easily, thereby reducing concerns when selecting the equipment, shortening the surgical time, and reducing fatigue, thereby providing a satisfactory surgical environment.

[0022] Additionally, it can minimize complications from the procedure and reduce the cost of the procedure.

[0023] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0024] Figure 1 is a drawing showing the configuration of a balloon catheter for microcatheter removal according to the first embodiment of the present invention in a deflated state.

[0025] Figure 2 is a drawing showing the configuration of the balloon of Figure 1 in an inflated state.

[0026] Figure 3 is a drawing showing the configuration of a balloon catheter for microcatheter removal according to the second embodiment of the present invention in a deflated state.

[0027] Figure 4 is a drawing showing the configuration of the balloon of Figure 3 in an inflated state.

[0028] Figure 5 is an enlarged view of the lumbar region showing the state in which the balloon of the balloon catheter for microcatheter removal according to the present invention is placed between the guide tube and the guide wire in a deflated state.

[0029] Figure 6 is an enlarged view of the lumbar region showing the balloon inflated in Figure 5 and the balloon tightly fixing the guide wire to the inner wall of the guide tube.

[0030] Figure 7 is an enlarged view of the lumbar region showing the state in which the microcatheter is withdrawn from the guide tube in Figure 6.

[0031] Figure 8 is an enlarged view of the lumbar region showing the balloon catheter withdrawn from the guide tube in Figure 7.

[0032] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below, along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention.

[0033] The terminology used herein is for the purpose of describing embodiments only and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, the terms "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components in addition to the mentioned components. The same reference numerals refer to the same components throughout the specification, and "and / or" includes each and every combination of one or more of the mentioned components.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in their common sense to those of ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0035] Hereinafter, the present invention will be described in detail with reference to the attached drawings.

[0036] Before the explanation, in several embodiments, components having the same configuration will be described representatively in the first embodiment using the same reference numerals, and in other embodiments, components having different configurations from the first embodiment will be described.

[0037] In addition, it is to be noted in advance that the fluid for inflating the balloon below may include a contrast agent that is not permeable to X-rays, or a fluid that is harmless to the human body, such as saline solution or air.

[0038] FIGS. 1 and 2 illustrate a balloon catheter for microcatheter removal according to a first embodiment of the present invention.

[0039] FIG. 1 is a drawing showing the configuration of a balloon catheter for microcatheter removal according to a first embodiment of the present invention in a deflated state, and FIG. 2 is a drawing showing the configuration of the balloon of FIG. 1 in an inflated state.

[0040] As shown in these drawings, the balloon catheter (1a) for microcatheter removal according to the first embodiment of the present invention includes a balloon (10a), a balloon catheter body (20), and a balloon support rod (40).

[0041] A balloon (10a) is positioned between the inner wall of the guide tube (100, see FIG. 5) and the guide wire (110), and is inflated or deflated, through a passage (130, see FIG. 5) formed between the guide tube (100, see FIG. 5) inserted into the lumen (200, see FIG. 5) and the micro catheter (120, see FIG. 5) that movably supports the guide wire (110, see FIG. 5) directed toward the lesion target (210, see FIG. 5).

[0042] The micro catheter (120) is movably mounted on the guide wire (110) and improves the support force of the guide wire (110) during the procedure, thereby helping the guide wire (110) to easily enter the lesion target (210).

[0043] Meanwhile, the maximum outer diameter of the deflated balloon (10a) is smaller than the gap of the passage (130). This allows the balloon (10a) to be smoothly inserted and moved along the passage (130), thereby positioning the balloon (10a) between the inner wall of the guide tube (100) located in front of the microcatheter (120) and the guide wire (110).

[0044] Here, the balloon (10a) may include an inflatable and deflating rubber or silicone material.

[0045] The balloon catheter body (20) has a rod shape of a certain length, and the balloon (10a) is drawn into and inserted into the guide tube (100).

[0046] The balloon catheter body (20) includes a fluid discharge hole (25) and a fluid flow path (31).

[0047] One side of the balloon catheter body (20) supports one side of the balloon (10a).

[0048] A fluid discharge hole (25) is provided at the end of the balloon catheter body (20) to discharge fluid for inflating the balloon (10a).

[0049] The fluid flow path (31) has a certain diameter inside the balloon catheter body (20) and is formed along the length of the balloon catheter body (20).

[0050] The fluid flow path (31) communicates with the fluid discharge hole (25) and guides the flow of fluid for injecting the fluid into the balloon (10a).

[0051] On the other side of the balloon catheter body (20), an operating part (35) is provided for holding and operating the balloon catheter body (20).

[0052] The operating unit (35) can be operated to supply fluid provided from the outside to the balloon (10a) through the fluid flow path (31), or to discharge fluid supplied to the balloon (10a) to the outside through the fluid flow path (31).

[0053] In addition, the operating unit (35) can also adjust the position of the balloon (10a) by gripping the catheter body (20) so that the balloon (10a) passes through the passage (130) and is positioned between the inner wall of the guide tube (100) located in front of the micro catheter (120) and the guide wire (110).

[0054] Meanwhile, the balloon support rod (40) has a certain length, protrudes from the fluid discharge hole (25) of the balloon catheter body (20), and is inserted into the flow path (31).

[0055] On one side of the protrusion (42) of the balloon support rod (40), the other side of the balloon (10a) is supported to accommodate the fluid discharge hole (25).

[0056] In addition, the balloon catheter (1a) for microcatheter removal according to the first embodiment of the present invention further includes a pair of markers (50a) for indicating the position of the balloon (10a).

[0057] A pair of markers (50a) are provided at intervals on the protrusions (45) accommodated in the balloon (10a).

[0058] Additionally, the marker (50a) may be made of a material that is impermeable to X-rays, etc.

[0059] Accordingly, when X-rays are directed toward the balloon (10a), the operator can easily recognize the position of the marker (50a), thereby confirming the exact position of the balloon (10a).

[0060] Here, although not shown, a number of protrusions are formed on the surface of the balloon, so that when the balloon is inflated, the number of protrusions adhere to the inner wall of the guide tube and the guide wire, thereby preventing the balloon from slipping from the inner wall of the guide tube and the guide wire, thereby allowing the microcatheter to be withdrawn from the guide tube more smoothly.

[0061] FIGS. 3 and 4 illustrate a balloon catheter for microcatheter removal according to a second embodiment of the present invention.

[0062] FIG. 3 is a drawing showing the configuration of a balloon catheter for microcatheter removal according to a second embodiment of the present invention in a deflated state, and FIG. 4 is a drawing showing the configuration of the balloon of FIG. 3 in an inflated state.

[0063] As shown in these drawings, the balloon catheter (1b) for microcatheter removal according to the second embodiment of the present invention, unlike the first embodiment described above, has one marker (50b) having a length corresponding to the length of the balloon (10b) and is provided on a protrusion (45) accommodated in the balloon (10b).

[0064] Accordingly, the fluid supplied to the balloon (10b) is supplied into the interior of the balloon (10b) through the fluid flow path (31) and the fluid discharge hole (25), thereby enabling the balloon (10b) to be expanded.

[0065] By this configuration, in the CTO lesion (Chronic Total Occlusion Lesion) treatment performed by applying the micro catheter (120) using the balloon catheter (1a) for micro catheter removal according to the first embodiment of the present invention, the process of removing the micro catheter (120) is described as follows.

[0066] First, when a guide wire (110) supported by a micro catheter (120) passes through a guide tube (100) inserted into a lumen (200) and passes through a lesion target (210), the micro catheter (120) is inserted as far into the guide tube (100) as possible while maintaining the guide wire (110) at the distal part.

[0067] At this time, the micro catheter (120) is positioned so that the tip of the micro catheter (120) is positioned on the inside of the guide tube (100), for example, 5 cm in length from the tip of the guide tube (100), taking into account the difference in length between the guide wire (110) and the micro catheter (120), as shown in FIG. 5.

[0068] Next, as shown in FIG. 5, the deflated balloon (10a) of the balloon catheter (1a) for micro catheter removal according to the present invention is positioned in front of the micro catheter (120) inserted into the guide tube (100) through the passage (130) between the guide tube (100) and the micro catheter (120).

[0069] At this time, the position of the balloon (10a) is confirmed through the marker (50a) contained in the balloon (10a) by irradiating the movement path of the balloon (10a) with X-rays, and the balloon (10a) is positioned in front of the micro catheter (120). More specifically, the balloon (10a) is positioned between the inner wall of the guide tube (100) and the guide wire (110).

[0070] Next, as shown in Fig. 6, when the balloon (10a) is positioned at a desired position inside the induction tube (100), a fluid for inflating the balloon is supplied into the interior of the balloon (10a) through the fluid flow path (31) of the balloon catheter body (20) and the fluid discharge hole (25), thereby inflating the balloon (10a).

[0071] At this time, the balloon (10a) is inflated so that the guide wire (110) adheres to the inner wall of the guide tube (100).

[0072] And, after the guide wire (110) is pressed against the inner wall of the guide tube (100) by the inflated balloon (10a), when the operator pulls the micro catheter (120) in the opposite direction of the lesion target (210) while holding the balloon catheter (1a) so that the guide wire (110) and the guide tube (100) do not move, as shown in FIG. 7, the guide tube (100) and the guide wire (110) are pressed against each other by the balloon (10a), and only the micro catheter (120) moves away from the lesion target (210) along the inner wall of the guide tube (100) and the guide wire (110), and is pulled out from the guide tube (100).

[0073] Meanwhile, the balloon catheter (1a) for microcatheter removal according to the present invention has a balloon (10a) positioned between the inner wall of the guide tube (100) located in front of the microcatheter (120) and the guide wire (110) to integrally fix the guide tube (100) and the guide wire (110), so that in the process of withdrawing the microcatheter (120) from the guide tube (100), only the microcatheter (120) can respond to various bending shapes of the guide tube (100), and the guide wire (110) and the guide tube (100) that have passed through the CTO lesion can be safely removed from the guide tube (100), and the procedure time can be shortened.

[0074] In addition, since the balloon (10a) used for the procedure can be recycled by shrinking and restoring it to its original state, the procedure cost can also be reduced.

[0075] While the embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical spirit or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. A balloon that is positioned between the inner wall of the guide tube and the guide wire through a passage formed between the guide tube inserted into the lumen and the microcatheter that movably supports the guide wire inserted into the guide tube and directed toward the lesion target, and that is inflated or deflated; A balloon catheter body having a fluid discharge hole through which fluid for inflating the balloon is discharged and a fluid flow path that guides the flow of fluid to the fluid discharge hole, supporting one side of the balloon and introducing the balloon into and out of the inside of the guide tube through the passage; and A balloon catheter for microcatheter removal, comprising a balloon support rod having a protrusion protruding from the fluid discharge hole and inserted into a flow path of the balloon catheter body, and supporting the other side of the balloon on one side of the protrusion.

2. In paragraph 1, A balloon catheter for microcatheter removal, wherein when the balloon is placed between the inner wall of the guide tube and the guide wire and inflated, the balloon tightly fixes the guide wire to the inner wall of the guide tube.

3. In paragraph 1, A balloon catheter for microcatheter removal, wherein the maximum outer diameter of the deflated balloon is smaller than the gap of the passage.

4. In paragraph 1, A balloon catheter for microcatheter removal, further comprising a pair of markers provided at intervals on the protrusions accommodated in the balloon to indicate the position of the balloon.

5. In paragraph 1, A balloon catheter for microcatheter removal, further comprising a marker corresponding to the length of the balloon and provided on a protrusion accommodated in the balloon to indicate the position of the balloon.

6. In paragraph 1, A balloon catheter for microcatheter removal, wherein the balloon comprises an inflatable and deflated rubber or silicone material.

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