WO2021162258A1 - Optical coherence tomography brain catheter for intracerebrovascular surgery and method for using same - Google Patents

Abstract

According to an optical coherence tomography brain catheter for intracerebrovascular surgery and a method for using same, proposed in the present invention, the optical coherence tomography brain catheter comprises: a catheter distal portion including a distal non-braided OCT lens catheter for imaging an intracerebral vessel and a distal braided catheter integrally connected to the distal non-braided OCT lens catheter; a catheter proximal portion including a proximal braided catheter integrally connected to the distal braided catheter of the catheter distal portion and a proximal shaft integrally connected to the proximal braided catheter; and a microwire for guiding the direction in which the catheter distal portion inserted into a blood vessel travels along the blood vessel. Therefore, unlike the structure of the existing heart OCT catheter, the brain catheter can have improved exploration and propulsion for reaching a multifolded brain blood vessel and can minimize the interference of an optical coherence tomography for intracerebrovascular surgery.

Description

Brain catheter for optical coherence tomography for endovascular surgery and method of using the same

The present invention relates to a brain catheter and a method of using the same, and more particularly, to a brain catheter for optical coherence tomography for intracerebrovascular surgery and a method of using the same.

In general, a catheter (catheter) is one of the general names of tubular instruments, means a tubular device for insertion into a body cavity or an organ having a lumen. These catheters are used for the purpose of discharging retentions in body cavities or various organs, aspiration of perfusate for washing, measuring cardiovascular behavior or central venous pressure, and injecting drugs or contrast agents into the body, and various materials and sizes according to these uses. , can be formed in the form As conventional techniques for vascular imaging catheters used for diagnosing cardiovascular disease, intravascular ultrasound, intravascular near-infrared imaging technology, and intravascular optical coherence tomography have been commercialized and utilized in clinical practice.

The intravascular optical coherence tomography technology used in intravascular optical coherence tomography is a catheter-type device that is inserted into the blood vessel to send light to the blood vessel, and analyzes the returned light to obtain a tomography image of the blood vessel. Early intravascular optical coherence tomography was not widely used because its speed was not as fast as that of intravascular ultrasound. You can shoot video. Since light is used, images are acquired while flushing a solution of saline and angiography in order to minimize the effect of blood.

The main cause of ischemic cerebral infarction is atherosclerotic stenosis of cerebral blood vessels and accompanying thrombosis or thromboembolism caused by heart and aortic diseases. In cerebrovascular stenosis, the cause, progression, and type of cerebral infarction vary according to the constituents of the atherosclerotic plaque, so it is very important to accurately understand the information on the patient's treatment strategy.

In the cardiology area, a more accurate and safer method is to examine the cross-sectional images before and after endovascular surgery using a catheter (OCT catheter) using optical coherence tomography, an imaging device that can see cross-sectional images of coronary artery stenosis well. is being treated for stenosis. OCT catheters are flexible but not accessible. Such an OCT catheter can be accessed even with a flexible OCT catheter because the degree of curvature is relatively not severe after the catheter is inserted into the coronary artery, but there is a problem in applying the existing OCT catheter to the cerebral blood vessels. Accessibility is not good to apply to cerebral blood vessels that have to go through 3 or 4 severe bends. In addition, since the catheter protrudes from the sensor front of the OCT catheter, it is difficult to apply the coronary artery catheter to the cerebral blood vessels. Korean Patent Registration No. 10-1397272 is disclosed as a prior art document.

The present invention has been proposed to solve the above problems of the previously proposed methods, and a distal non-braided OCT lens catheter and a distal non-braided OCT lens catheter for imaging intracerebrovascular images are integrally connected and formed A catheter distal portion having a catheter distal portion having a distal braided catheter, a proximal braided catheter integrally formed with the distal braided catheter of the catheter distal portion, and a proximal shaft formed integrally connected with the proximal braided catheter, and a catheter distal portion inserted into a blood vessel By including a microwire that guides the flow of blood vessels, the propulsion and search for reaching the cerebral blood vessels with multiple bends is improved, unlike the existing OCT catheter for the heart, and optical coherence for intracerebrovascular surgery is improved. An object of the present invention is to provide a brain catheter for optical coherence tomography for intracerebrovascular surgery, and a method for using the same, so that the interference phenomenon of tomography can be minimized.

In addition, in the present invention, a braided tube form for penetrating a curved blood vessel flow path is applied, the catheter surface is hydrophilic coated, and a design structure with increased propulsion and navigation functions to reach the cerebral blood vessel with multiple bends is applied. This configuration enables stable propulsion and exploration into the lesion site of the cerebral blood vessels with many curvatures, as well as adopting a single lumen tube to unify the movement path of the rotating fiber optic core and the guide wire, so that the proximal and distal shafts It is another object to provide a brain catheter for optical coherence tomography for intracerebrovascular surgery, and a method of using the same, through which the connection part of the .

A brain catheter for optical coherence tomography for intracerebrovascular surgery according to a feature of the present invention for achieving the above object,

A brain catheter for optical coherence tomography for endovascular surgery, comprising:

a catheter distal portion having a distal non-braided OCT lens catheter for imaging intracerebrovascularization, and a distal braided catheter integrally formed with the distal non-braided OCT lens catheter;

a catheter proximal portion having a proximal braided catheter integrally formed with the distal braided catheter of the catheter distal portion and a proximal shaft formed integrally connected with the proximal braided catheter; and

It is characterized in that it includes a microwire connected to the distal end of the non-braided OCT lens catheter in the distal portion of the catheter and the side of the distal braided catheter, and guides the direction of blood flow of the distal portion of the catheter to be inserted into the blood vessel.

Preferably, the distal non-braided OCT lens catheter comprises:

It has a length of 30 mm corresponding to the length of a stenosis of a cerebral blood vessel or a cerebral aneurysm lesion, and as a region with an OCT (Optical Coherence Tomography) lens, it may be composed of a non-braided structure.

More preferably, the distal non-braided OCT lens catheter comprises:

A distal end hole into which the microwire is inserted may be further formed at the distal end.

Preferably, the distal braided catheter comprises:

The distal non-braided OCT lens catheter has a length of 270 mm and has a length of 270 mm in a structure that is integrally connected to the proximal portion of the lens catheter, and the contact area is increased as the micro wire passes through the inner diameter can be structured.

More preferably, the distal braided catheter comprises:

It is possible to form a side hole through which the micro wire 300 exits.

More preferably, the distal braided catheter comprises:

Consisting of a single lumen tube structure, it is possible to flexibly connect the connection part of the proximal shaft and the distal shaft by unifying the movement path of the rotating fiber optical core and the guide wire.

Even more preferably, the distal braided catheter comprises:

As the material of the distal shaft, it is composed of an elastomer-based resin such as Pebax and nylon, and the hardness is as low as 55D based on the shore hardness. can be applied with a low hardness of 45D or less.

Preferably, the proximal braided catheter comprises:

A portion of the distal braided catheter (portion) is located proximally as a structure for increasing the thrust (pushability), it may be composed of a braided (braided) of 1127 mm length (length).

More preferably, the proximal shaft comprises:

A portion of the proximal braided catheter is located proximally and integrally connected, and may be configured as a hard shaft having a length of 135 mm.

Even more preferably, the catheter proximal portion comprises:

In a braided tube structure including the proximal braided catheter and a proximal shaft, a braided wire is inserted in the braided tube, so that compared to a conventional catheter manufactured only by an extrusion process Column strength It may be configured to have a structure in which pushability is improved by improving the .

The method of using the brain catheter for optical coherence tomography for intracerebrovascular surgery according to the characteristics of the present invention for achieving the above object,

A method of using a brain catheter for optical coherence tomography for endovascular surgery comprising a catheter distal portion having a non-braided OCT lens catheter and a distal braided catheter, a catheter proximal portion having a proximal braided catheter and a proximal shaft, and a microwire As,

(1) inserting the catheter distal portion of the brain catheter for optical coherence tomography into the blood vessel;

(2) moving the distal portion of the catheter inserted in step (1) to the location of the lesion of the cerebral blood vessel under the guidance of the microwire; and

(3) performing optical coherence tomography through the distal non-braided OCT lens catheter of the catheter distal part of the brain catheter at the lesion location of the cerebral blood vessel through the step (2); do it with

Preferably, the distal non-braided OCT lens catheter comprises:

It has a length of 30 mm corresponding to the length of a stenosis of a cerebral blood vessel or a cerebral aneurysm lesion, and as a region with an OCT (Optical Coherence Tomography) lens, it may be composed of a non-braided structure.

More preferably, the distal non-braided OCT lens catheter comprises:

A distal end hole into which the microwire is inserted may be further formed at the distal end.

Preferably, the distal braided catheter comprises:

The distal non-braided OCT lens catheter has a length of 270 mm and has a length of 270 mm in a structure that is integrally connected to the proximal portion of the lens catheter, and the contact area is increased as the micro wire passes through the inner diameter can be structured.

More preferably, the distal braided catheter comprises:

It is possible to form a side hole through which the micro wire 300 exits.

More preferably, the distal braided catheter comprises:

Consisting of a single lumen tube structure, it is possible to flexibly connect the connection part of the proximal shaft and the distal shaft by unifying the movement path of the rotating fiber optical core and the guide wire.

Even more preferably, the distal braided catheter comprises:

As the material of the distal shaft, it is composed of an elastomer-based resin such as Pebax and nylon, and the hardness is as low as 55D based on the shore hardness. can be applied with a low hardness of 45D or less.

Preferably, the proximal braided catheter comprises:

A portion of the distal braided catheter (portion) is located proximally as a structure for increasing the thrust (pushability), it may be composed of a braided (braided) of 1127 mm length (length).

More preferably, the proximal shaft comprises:

A portion of the proximal braided catheter is located proximally and integrally connected, and may be configured as a hard shaft having a length of 135 mm.

Even more preferably, the catheter proximal portion comprises:

In a braided tube structure including the proximal braided catheter and a proximal shaft, a braided wire is inserted in the braided tube, so that compared to a conventional catheter manufactured only by an extrusion process Column strength It may be configured to have a structure in which pushability is improved by improving the .

According to the brain catheter for optical coherence tomography for endovascular surgery proposed in the present invention and a method for using the same, the distal non-braided OCT lens catheter and the distal non-braided OCT lens catheter for imaging intracerebrovascular images are integrated with the catheter A catheter distal portion having a distal braided catheter formed in connection with a catheter distal portion, a proximal braided catheter formed integrally connected with the distal braided catheter of the distal catheter portion, and a proximal shaft having a proximal shaft formed integrally connected with the proximal braided catheter, and into a blood vessel By including a microwire that guides the direction of blood vessel progression at the distal part of the inserted catheter, the propulsion and search for reaching the cerebral blood vessel with multiple bends is improved, unlike the structure of the existing OCT catheter for the heart, and intracerebrovascular surgery It is possible to minimize the interference phenomenon of optical coherence tomography.

In addition, according to the brain catheter for optical coherence tomography for intracerebrovascular surgery of the present invention and a method for using the same, a braided tube shape for penetrating a curved vascular flow path is applied, the catheter surface is hydrophilic coated, and several bends By applying and constructing a design structure with enhanced propulsion and search functions to reach the cerebral blood vessels, it enables stable propulsion and exploration into the lesion area of cerebral blood vessels with many curvatures, as well as adopting a single lumen tube. By unifying the movement path of the rotating fiber optic core and the guide wire, the connection part of the proximal shaft and the distal shaft is flexibly connected, and through this, the distal part can stably penetrate the curved blood vessel.

1 is a view showing the configuration of a brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention as a functional block.

Figure 2 is a view schematically showing the overall configuration of the brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention.

Figure 3 is a view showing an enlarged configuration of the distal part of the brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention.

4 is a view showing images taken with and without a braided micro-catheter for cerebrovascular during OCT imaging in an in-vitro vessel model.

5 is a view showing an image directly measuring the length from the carotid artery to the middle cerebral artery distal part of the actual patient.

6 is a view showing a flow of a method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention.

<Explanation of code>

10: Brain catheter for optical coherence tomography according to an embodiment of the present invention

100: catheter distal

110: distal non-braided OCT lens catheter

111: distal end hole

120: distal braided catheter

121: side hole (side hole)

200: catheter proximal

210: proximal braided catheter

220: proximal shaft

300: micro wire

S110: a step in which the catheter distal portion of the brain catheter for optical coherence tomography is inserted into the blood vessel

S120: The distal part of the catheter is moved to the lesion location of the cerebral blood vessel under the guidance of the microwire

S130: At the lesion location of the cerebral blood vessels, optical coherence tomography is performed through the distal non-braided OCT lens catheter of the catheter distal part of the brain catheter.

Hereinafter, preferred embodiments will be described in detail so that those of ordinary skill in the art can easily practice the present invention with reference to the accompanying drawings. However, in describing a preferred embodiment of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' with another part, it is not only 'directly connected' but also 'indirectly connected' with another element interposed therebetween. include In addition, "including" a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated.

1 is a functional block diagram illustrating the configuration of a brain catheter for optical coherence tomography for endovascular surgery according to an embodiment of the present invention, and FIG. It is a view schematically showing the overall configuration of the brain catheter for optical coherence tomography, and FIG. 3 is a view showing an enlarged configuration of the distal part of the brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention 4 is a view showing images taken with and without a braided micro-catheter for cerebral blood vessels during OCT imaging in an in-vitro vessel model, and FIG. 5 is an actual patient's carotid artery to major It is a diagram showing an image directly measuring the length to the distal part of the cerebral artery. 1 to 3, the brain catheter 10 for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention, the catheter distal part 100, the catheter proximal part 200, and It may be configured to include a micro wire (300).

The catheter distal portion 100 includes a distal non-braided OCT lens catheter 110 for taking images within the cerebral blood vessels, and a distal braided catheter 120 integrally connected with the distal non-braided OCT lens catheter 110 . The configuration of the distal portion having The distal non-braided OCT lens catheter 110 of the catheter distal part 100 has a length of 30 mm corresponding to the length of a stenosis of a cerebral blood vessel or a cerebral aneurysm lesion, and has an OCT (Optical Coherence Tomography) lens. It may consist of a non-braided structure as a region. Here, the background of applying the distal non-braided OCT lens catheter 110 as non-braided may be braided to increase flexibility and navigability, but FIG. 4 As shown in Fig., through an experiment, after placing a braided micro-catheter right next to the OCT lens, it was confirmed that the image does not come out due to the interference phenomenon in the image taken by OCT, and braided. Did not do it. 4 shows an image showing an interference phenomenon between the left image when there is no braided microcatheter for cerebral blood vessels during OCT imaging in the in-vitro vessel model and the right image when there is.

In addition, when the distal non-braided OCT lens catheter 110 is applied to a length of 30 mm, lesions exceeding 30 mm in length, such as stenosis of cerebral blood vessels or cerebral aneurysms, are rare. Since the (non-braided) length is increased and the braided length is shortened, which adversely affects the navigability, a design with a reduced length from the existing OCT for heart 50 mm was applied.

In addition, the distal non-braided OCT lens catheter 110 may further form a distal end hole 111 into which the microwire 300 is inserted into the distal end.

In addition, the distal braided catheter 120 of the catheter distal portion 100 has a length of 270 mm in a structure integrally connected and positioned proximal to a portion of the distal non-braided OCT lens catheter 110, It may be configured in a braided structure in which the contact area is increased as the microwire 300 passes through the inner diameter. The distal braided catheter 120 is configured in a single lumen tube structure, so that the connecting portion of the proximal shaft and the distal shaft is flexibly connected by unifying the movement path of the rotating fiber optic core and the guide wire. Here, the distal braided catheter 120 is composed of an elastomer-based resin such as Pebax and nylon as a material of the distal shaft, and the hardness is made with a low hardness of 55D or less based on the shore hardness, and it is not possible to touch the lesion. A low hardness of 45D or less can be applied to the distal tip region that can be used. Also, the distal braided catheter 120 may form a side hole 121 through which the microwire 300 exits.

Here, the length of the distal braided catheter 120 is configured to be 270 mm long, and the microwire 300 passes through to increase the contact area with the micro catheter, and also has a braided structure, so that it has pushability and directionality. (navigability) can be increased. That is, unlike the structure of the existing OCT catheter for the heart, it is a design form to increase pushability and navigability to reach the cerebral blood vessel with multiple bends, and the distal non-braided OCT lens catheter 110 is The microwire 300 enters from the distal end hole 111 and the microwire 300 comes out through the side hole 121 of the distal braided catheter 120, so that the contact portion between the microwire 300 and the microcatheter increases. (pushability) and navigability (navigability) can be improved.

In addition, the distal braided catheter 120 has a disadvantage in that the outer diameter (OD: outer diameter) of the catheter increases due to the diaphragm dividing it into dual lumen when manufactured as a dual lumen, so that a single lumen It can be confirmed that when applied, the micro wire 300 enters without friction with the OCT lens cable. In addition, when the length of the distal braided catheter 120 was 270 mm, the lesion started from the middle segment of the internal carotid artery, where the guiding catheter was mainly located during cerebrovascular surgery in the patient. This is because the length to the middle cerebral artery M1 distal segment, which is the tip of the cerebral artery, does not exceed 20-25 cm in most cases.

This catheter distal part 100 is adopted as a single lumen tube to unify the movement path of the rotating fiber optical core and the guide wire, so that the connection part of the proximal shaft and the distal shaft is flexible can be made to connect. In addition, in some cases, the path of the rotating fiber optic core and the guide wire may be separated to form a dual lumen tube. In addition, as the material of the distal shaft, an elastomer-based resin such as Pebax or Nylon can be applied. For the distal tip part, a low hardness of 45D or less can be applied. That is, the distal part is composed of a tube of low hardness to stably penetrate the curved blood vessel, but in some cases, straightness must also be secured. It can be configured to control flexibility and pushability appropriately for the procedure scene. In addition, a round type and a flat type can be applied to the braiding wire, and a wire having a diameter of 50 μm or less can be used, and not only SUS but also Nitinol or PEN can be applied. In addition, in the case of the distal part, coiling can be applied using a round type wire of 50 μm or less or a flat wire of 0.002 inch or less in height to configure a smaller profile.

The catheter proximal portion 200 includes a proximal braided catheter 210 integrally formed with the distal braided catheter 120 of the catheter distal portion 100 and a proximal braided catheter 210 integrally formed with the proximal braided catheter 210 and a proximal shaft 220 formed in integral connection with the proximal braided catheter 210 . It is a configuration of the proximal portion having a. The proximal braided catheter 210 of the catheter proximal portion 200 is positioned proximal to a portion of the distal braided catheter 120 to increase thrustability, and a length of 1127 mm is braided. ) can be composed of The proximal braided catheter 210 is positioned proximally of the distal braided catheter 120, and a structure for maximally increasing pushability is applied.

In addition, the proximal shaft 220 of the catheter proximal portion 200 is integrally connected to a portion (portion) of the proximal braided catheter 210, and a hard shaft having a length of 135 mm. can be composed of This proximal shaft 220 is positioned at the proximal braided catheter 210 region.

In addition, the catheter proximal portion 200 is a braided tube structure including a proximal braided catheter 210 and a proximal shaft 220, and a braided wire is inserted in the braided tube, so that only an extrusion process is required. It can be configured to have a structure in which the pushability is improved by improving the column strength compared to the manufactured existing catheter.

This catheter proximal portion 200 has a braided wire inserted in the braided tube, and thus the axial strength is improved compared to the existing catheter manufactured only by the extrusion process, so that the pushing force (Pushability) is Elastomer-based resins such as Pebax and Nylon can be applied as the material of the tube, and a hardness higher than 63D based on the Shore hardness is applied and used. In addition, as the braiding wire, a round type wire having a diameter of 50 μm or more can be used, a flat type wire of 0.003 inch or less can be applied, and not only SUS but also Nitinol or PEN can be applied.

The microwire 300 is connected through the side of the distal braided catheter 120 with the distal non-braided OCT lens catheter 110 of the catheter distal portion 100, and is inserted into the blood vessel of the catheter distal portion 100 . It is a structure that guides the direction of progress.

The brain catheter 10 having the catheter distal portion 100 and the catheter proximal portion 200 as described above is configured to easily penetrate the curved vascular flow path in the overall structure, and for this purpose, in the form of a braided shaft. It consists of at least three segments. In addition, the catheter surface of the brain catheter 10 has a hydrophilic coating, and unlike the structure of the existing cardiac image guide OCT catheter, pushability and navigability are applied to reach the cerebral blood vessel with multiple bends. It can be seen that the design structure to increase is being applied.

6 is a diagram illustrating a flow of a method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention. 6, the method of using the brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention is that the catheter distal portion of the brain catheter for optical coherence tomography is inserted into the blood vessel. Step (S110), the distal catheter portion is moved to the lesion location of the cerebral blood vessel under the guidance of the microwire (S120), and at the lesion location of the cerebral blood vessel, the distal non-braided OCT lens catheter of the catheter distal portion of the brain catheter is removed. Through the optical coherence tomography may be implemented including the step (S130) is performed. The method of using the brain catheter for optical coherence tomography for intracerebrovascular surgery of the present invention includes a non-braided OCT lens catheter 110 and a distal braided catheter 120, as shown in FIGS. 1 to 3, respectively. A brain catheter for optical coherence tomography for endovascular surgery including a catheter distal portion 100, a proximal braided catheter 210 and a proximal shaft 220 having a catheter proximal portion 200, and a microwire 300 (10) is used.

In step S110, the catheter distal portion 100 of the brain catheter 10 for optical coherence tomography is inserted into the blood vessel, and in step S120, the catheter distal portion 100 inserted in step S110 is the guide of the microwire 300. It is guided to the lesion location of the cerebral blood vessels, and in step S130, the distal non-braided OCT lens catheter 110 of the catheter distal part 100 of the brain catheter 10 at the lesion location of the cerebral blood vessels through step S120. Optical coherence tomography is performed. Since the details related to each of these steps have been sufficiently described in relation to the brain catheter 10 for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention, a repetitive detailed description will be omitted.

As described above, the brain catheter for optical coherence tomography for intracerebrovascular surgery according to an embodiment of the present invention and a method of using the same, the distal non-braided OCT lens catheter and the distal non- A catheter distal portion having a distal braided catheter formed integrally with the braided OCT lens catheter, a proximal braided catheter integrally formed with the distal braided catheter of the catheter distal portion, and a proximal shaft formed integrally with the proximal braided catheter By including a microwire that guides the direction of blood vessel progression at the proximal part of the catheter and the distal part of the catheter inserted into the blood vessel, the propulsion and search for reaching the cerebral blood vessel with multiple bends is improved, unlike the structure of the existing OCT catheter for the heart. The interference phenomenon of optical coherence tomography for intracerebrovascular surgery can be minimized. By applying a design structure with enhanced propulsion and search functions to reach the cerebral blood vessels with curvature, it enables stable propulsion and exploration into the lesion area of cerebral blood vessels with many curvatures, as well as a single lumen tube. By adopting it, the movement path of the rotating fiber optical core and the guide wire is unified, so that the connection part of the proximal shaft and the distal shaft is flexibly connected, and through this, the distal part can stably penetrate the curved blood vessel.

Various modifications and applications of the present invention described above are possible by those skilled in the art to which the present invention pertains, and the scope of the technical idea according to the present invention should be defined by the following claims.

Claims (20)

A brain catheter (10) for optical coherence tomography for endovascular surgery, comprising: A catheter distal portion 100 having a distal non-braided OCT lens catheter 110 for imaging intracerebrovascularization, and a distal braided catheter 120 integrally formed with the distal non-braided OCT lens catheter 110 . ); A catheter proximal portion having a proximal braided catheter 210 integrally formed with a distal braided catheter 120 of the catheter distal portion 100 and a proximal shaft 220 formed integrally connected with the proximal braided catheter 210 . (200); and The distal non-braided OCT lens catheter 110 of the catheter distal part 100 is connected through the side of the distal braided catheter 120, and the catheter distal part 100 inserted into the blood vessel guides the vascular progression direction. A brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it comprises a wire (300). The catheter of claim 1, wherein the distal non-braided OCT lens catheter (110) comprises: It has a length of 30 mm corresponding to the length of a cerebral blood vessel stenosis or a cerebral aneurysm lesion, and is a region with an OCT (Optical Coherence Tomography) lens, characterized in that it is composed of a non-braided structure. , Brain catheter for optical coherence tomography for endovascular surgery. 3. The catheter of claim 2, wherein the distal non-braided OCT lens catheter (110) comprises: A brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it further forms a distal end hole (111) into which the microwire (300) is inserted into the distal end. The method of claim 1, wherein the distal braided catheter (120) comprises: The distal non-braided OCT lens catheter 110 has a length of 270 mm in a structure that is integrally connected to the proximal portion of the lens and has a length of 270 mm, and the contact area is increased as the micro wire 300 passes through the inner diameter. A brain catheter for optical coherence tomography for endovascular surgery, characterized in that it consists of an increased braided structure. 5. The method of claim 4, wherein the distal braided catheter (120) comprises: A brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it forms a side hole through which the microwire 300 comes out. 5. The method of claim 4, wherein the distal braided catheter (120) comprises: Consisting of a single lumen tube structure, it unifies the movement path of the rotating fiber optic core and the guide wire so that the connection part of the proximal shaft and the distal shaft is flexibly connected. Brain catheter for coherence tomography. 7. The method of claim 6, wherein the distal braided catheter (120) comprises: As the material of the distal shaft, it is composed of an elastomer-based resin such as Pebax and nylon, and the hardness is as low as 55D based on the shore hardness. is a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that a low hardness of 45D or less is applied. 8. The catheter according to any one of claims 1 to 7, wherein the proximal braided catheter (210) comprises: A structure for increasing pushability by being located proximal to a portion of the distal braided catheter 120, characterized in that it is composed of a braid of a length of 1127 mm, endovascular surgery Brain catheter for optical coherence tomography. 9. The method of claim 8, wherein the proximal shaft (220) comprises: A portion of the proximal braided catheter 210 is located proximally and integrally connected, and it is characterized in that it is composed of a hard shaft having a length of 135 mm, for endovascular surgery Brain catheter for optical coherence tomography. 10. The method of claim 9, wherein the catheter proximal portion (200), In a braided tube structure including the proximal braided catheter 210 and the proximal shaft 220, a braided wire is inserted in the braided tube, compared to a conventional catheter manufactured only by an extrusion process. A brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it has a structure in which pushability is improved by improving axial strength. A catheter distal portion 100 having a non-braided OCT lens catheter 110 and a distal braided catheter 120 , a catheter proximal portion 200 having a proximal braided catheter 210 and a proximal shaft 220 , and a microwire As a method of using a brain catheter (10) for optical coherence tomography for intracerebrovascular surgery, including (300), (1) the catheter distal portion 100 of the brain catheter 10 for optical coherence tomography is inserted into the blood vessel; (2) moving the catheter distal part 100 inserted in step (1) to the lesion location of the cerebral blood vessel under the guidance of the microwire 300; and (3) at the lesion location of the cerebral blood vessels through the step (2), optical coherence tomography is performed through the distal non-braided OCT lens catheter 110 of the catheter distal portion 100 of the brain catheter 10 Method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it comprises a step. 12. The method of claim 11, wherein the distal non-braided OCT lens catheter (110) comprises: It has a length of 30 mm corresponding to the length of a cerebral blood vessel stenosis or a cerebral aneurysm lesion, and is a region with an OCT (Optical Coherence Tomography) lens, characterized in that it is composed of a non-braided structure. , A method of using a brain catheter for optical coherence tomography for endovascular surgery. 13. The method of claim 12, wherein the distal non-braided OCT lens catheter (110) comprises: A method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it further forms a distal end hole (111) into which the microwire (300) is inserted into the distal end. 12. The method of claim 11, wherein the distal braided catheter (120) comprises: The distal non-braided OCT lens catheter 110 has a length of 270 mm in a structure that is integrally connected to the proximal portion of the lens and has a length of 270 mm, and the contact area is increased as the micro wire 300 passes through the inner diameter. A method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it consists of an increased braided structure. 15. The method of claim 14, wherein the distal braided catheter (120) comprises: A method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that a side hole is formed through which the microwire 300 comes out. 15. The method of claim 14, wherein the distal braided catheter (120) comprises: Consisting of a single lumen tube structure, it unifies the movement path of the rotating fiber optic core and the guide wire so that the connection part of the proximal shaft and the distal shaft is flexibly connected. How to use a brain catheter for coherence tomography. 17. The method of claim 16, wherein the distal braided catheter (120) comprises: As the material of the distal shaft, it is composed of an elastomer-based resin such as Pebax and nylon, and the hardness is as low as 55D based on the shore hardness. is a method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that a low hardness of 45D or less is applied. 18. The method of any one of claims 11-17, wherein the proximal braided catheter (210) comprises: A structure for increasing pushability by being located proximal to a portion of the distal braided catheter 120, characterized in that it is composed of a braid of a length of 1127 mm, endovascular surgery A method of using a brain catheter for optical coherence tomography. 19. The method of claim 18, wherein the proximal shaft (220) comprises: A portion of the proximal braided catheter 210 is located proximally and integrally connected, and it is characterized in that it is composed of a hard shaft having a length of 135 mm, for endovascular surgery A method of using a brain catheter for optical coherence tomography. 20. The method of claim 19, wherein the catheter proximal portion (200), In a braided tube structure including the proximal braided catheter 210 and the proximal shaft 220, a braided wire is inserted in the braided tube, compared to a conventional catheter manufactured only by an extrusion process. A method of using a brain catheter for optical coherence tomography for intracerebrovascular surgery, characterized in that it has a structure in which pushability is improved by improving axial strength.

Images