Balloon dilatation catheter for intracranial arteries

Abstract

The application discloses a balloon dilatation catheter for intracranial artery and belongs to the technical field of medical devices. The balloon dilatation catheter for intracranial artery comprises a balloon assembly, a head section catheter assembly, a tail section catheter assembly, a middle section catheter and a catheter sheath, the balloon assembly comprises a balloon body, two dredging hoses, a plurality of bowl-shaped bases and a plurality of adsorption hoses, dredging holes are formed in the upper and lower portions of the middle of the front and back ends of the balloon body, a plurality of containing holes are uniformly formed in the periphery of the balloon body in a ring shape, the outer sides of the plurality of bowl-shaped bases are fixedly provided with medicine storage protrusions, the head section catheter assembly comprises a head section catheter body, two developing rings and a connecting hose, the success rate and safety of blood vessel dilation are improved, the risk of blood vessel injury in the dilation process is reduced, the pressure of the balloon body on the blood vessel wall dilation is controlled, and the dilation process is matched with the medicine to prevent blood vessel restenosis and blood vessel spasm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more particularly to a balloon dilatation catheter for intracranial artery. BACKGROUND

[0002] The balloon dilatation catheter for intracranial artery is a key interventional instrument for treating intracranial artery stenosis, which is suitable for the anatomical characteristics of fine and tortuous intracranial blood vessels. The main body is composed of a balloon and a fine push catheter. The balloon has both expansion force and blood vessel compatibility, which can reduce the risk of blood vessel injury. Under the guidance of imaging, the catheter is accurately sent to the stenosis site. The balloon is slowly inflated at low pressure to expand the stenosis blood vessel wall and restore blood flow, which improves the blood supply of brain tissue. It needs to be operated by experienced doctors, and the blood vessel needs to be monitored during the operation to ensure treatment safety.

[0003] When the balloon dilatation catheter for intracranial artery is used, a puncture needle is used to puncture the artery, the puncture needle is withdrawn after the guide wire is inserted, the catheter sheath is sent along the guide wire to establish a passage, the catheter is sent to the proximal end of the intracranial artery through the catheter sheath, and then the balloon catheter is accurately sent to the stenosis site along the micro guide wire. The balloon is inflated slowly at low pressure by a pressure pump to dilate the stenosis segment. After the blood flow is restored, the balloon is deflated. During the process of expanding the blood vessel, the pressure caused by the balloon to the blood vessel cannot be controlled, and the expansion process cannot be combined with drugs, which can easily cause blood vessel restenosis and blood vessel spasm. To solve these problems, the present application provides a balloon dilatation catheter for intracranial artery. SUMMARY

[0004] The purpose of the present application is to provide a balloon dilatation catheter for intracranial artery to solve the problems raised in the background art: improve the success rate of blood vessel expansion, reduce the risk of blood vessel injury during expansion, and realize real-time monitoring of blood vessel expansion and accurate control of expansion pressure.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A balloon dilatation catheter for intracranial artery, comprising a balloon assembly, a head segment catheter assembly, a tail segment catheter assembly, a middle segment catheter and a catheter sheath:

[0007] The balloon assembly comprises a balloon body, two dredging hoses, a plurality of bowl-shaped bases and a plurality of adsorption hoses. The balloon body is provided with dredging holes at the upper and lower parts of the middle part of the front and rear ends. A plurality of accommodating holes are uniformly provided around the balloon body. The outer side of each bowl-shaped base is fixedly provided with a drug storage protrusion.

[0008] The head segment catheter assembly comprises a head segment catheter body, two developing rings and a connecting hose. Two accommodating grooves are spaced apart and provided around the front end of the head segment catheter body. A pressure sensor is fixedly arranged inside each accommodating groove.

[0009] By adopting the technical scheme, the balloon assembly can expand the blood vessel expansion position and deliver drugs at the same time, prevent blood vessel restenosis and vasospasm, and make part of the blood in the blood vessel flow, prolong the expansion time, and facilitate accurate control and monitoring of the pressure of the balloon body during expansion by the head section catheter assembly, thereby preventing the blood vessel from being damaged.

[0010] Preferably, two of the four dredging holes are respectively provided with two dredging hoses on opposite sides.

[0011] By adopting the technical scheme, the dredging hoses penetrating the dredging holes make the blood in the blood vessel flow at the expansion position, the bowl-shaped base is fixed in the receiving hole, the bowl-shaped base communicates with the balloon body, and the bowl-shaped base rebounds after being extruded.

[0012] Preferably, a plurality of medicine storage protrusions are provided with medicine storage holes in the middle of the outer side, and the inner side of the balloon body is fixed to the front end of the head section catheter body.

[0013] By adopting the technical scheme, the medicine storage protrusions are provided with medicine storage holes on the outer side, the medicine storage protrusions are extruded by the inner wall of the blood vessel during expansion, the medicine in the medicine storage protrusions is discharged through the medicine storage holes, the medicine is matched with the expansion position, and the inner side of the balloon body is fixed to the circumference of the head section catheter body, so that the balloon body does not displace during expansion.

[0014] Preferably, a plurality of adsorption hoses are uniformly penetrated in the middle of the circumference of the balloon body in a ring shape, and a plurality of adsorption hoses are penetrated in the circumference of the head section catheter body in a ring shape.

[0015] By adopting the technical scheme, the adsorption hoses are uniformly penetrated in the middle of the circumference of the balloon body in a ring shape and in the circumference of the head section catheter body, so that the adsorption hoses are opposite to the inner wall of the blood vessel during expansion of the balloon body, and the thrombus of the inner wall of the blood vessel is adsorbed.

[0016] Preferably, two developing rings are respectively fixed to the circumference of the head section catheter body and located at opposite ends of the two receiving grooves, and the outer sides of the two developing rings are respectively extruded on the inner side of the balloon body.

[0017] By adopting the technical scheme, the developing rings are fixed to the circumference of the head section catheter body and extruded on the inner side of the balloon body, so that medical staff can more clearly understand the positional relationship between the balloon body and the diseased blood vessel under X-ray.

[0018] Preferably, the tail section catheter assembly comprises a tail section catheter body, a first catheter interface is fixedly arranged at the rear end of the tail section catheter body, and a second catheter interface is penetrated and arranged on the upper side of the circumference of the tail section catheter body.

[0019] By adopting the technical scheme, the first catheter interface arranged at the rear end of the tail section catheter body is convenient for the guide wire to enter, thrombus on the inner wall of the blood vessel to be adsorbed and discharged, and the second catheter interface is convenient for being connected with the syringe and the pressure pump.

[0020] Preferably, the connecting hose is embedded in the inner wall of the head section catheter body, the middle section catheter and the tail section catheter body.

[0021] By adopting the technical scheme, the connecting hose is embedded in the inner wall of the head section catheter body, the middle section catheter and the tail section catheter body, so that the connecting hose is convenient for injecting the contrast agent and pressurizing the balloon body.

[0022] Preferably, the head section catheter body, the middle section catheter and the tail section catheter body are fixedly connected with each other, and the inner side of each of the head section catheter body, the middle section catheter and the tail section catheter body is provided with a guide wire channel which is axially through and has the same diameter.

[0023] By adopting the technical scheme, the head section catheter body, the middle section catheter and the tail section catheter body are fixedly connected with each other to form a complete catheter, and the guide wire channel with the same diameter is provided to guide the guide wire to enter the head section catheter body, the middle section catheter and the tail section catheter body.

[0024] Preferably, the head section catheter body is made of super-soft polyurethane, the middle section catheter is made of medium-hardness Pebax and sparse stainless steel braided mesh, and the tail section catheter body is made of high-hardness nylon and high-density stainless steel braided mesh.

[0025] By adopting the technical scheme, the soft design of the head section catheter body reduces damage to the blood vessel, the middle section catheter can improve the twist control and support in the blood vessel, and the tail section catheter body can improve the overall pushability.

[0026] Preferably, the head section catheter body is fixedly provided with a flexible head end at the front end, and the tail section catheter body is embedded in the inner side of the catheter sheath.

[0027] By adopting the technical scheme, the flexible head end at the front end of the head section catheter body reduces damage to the inner side of the blood vessel caused by movement of the head section catheter body in the blood vessel, and the tail section catheter body is embedded in the inner side of the catheter sheath to limit the tail section catheter and provide a channel for entering the blood vessel.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] 1) The intracranial artery balloon dilatation catheter is used, the balloon body is expanded in the blood vessel, the medicine storage protrusion connected with the bowl-shaped base extrudes the inner wall of the blood vessel, the anti-proliferation medicine and the antispasmodic medicine stored in the medicine storage protrusion are released through the medicine storage hole, the blood vessel restenosis and vasospasm are prevented, the dredging hose is arranged in the hole and penetrates through the hole, when the balloon body expands and blocks the blood vessel, the blood flows in the dredging hose, the blood supply of the distal brain tissue is ensured, and the safe expansion time is prolonged.

[0030] 2) The intracranial artery balloon dilatation catheter is used, the head section catheter body, the middle section catheter body and the tail section catheter body are connected, and different materials are used to manufacture the head section catheter body, the middle section catheter body and the tail section catheter body, the head section catheter body is designed as a soft head without trauma, the blood vessel is prevented from being damaged, the middle section catheter body improves the twist control and support in the blood vessel, and the tail section catheter body improves the pushability of the whole body in the blood vessel.

[0031] 3) The intracranial artery balloon dilatation catheter is used, the connecting hose penetrates through the balloon body and is embedded in the pipe wall of the head section catheter body, the middle section catheter body and the tail section catheter body, the syringe is connected to the second catheter interface to inject the contrast medium into the balloon body, the inflation shape of the balloon body is observed in real time, the position of the balloon body is judged, the inflation size of the balloon body can be controlled through the second catheter interface connected to the pressure pump, the inflation pressure of the balloon body is fed back in real time through the pressure sensor, the blood vessel is prevented from being ruptured due to excessive inflation, the adsorption hose penetrates through the balloon body and the head section catheter body, the adsorption hose inlet is attached to the inner wall of the blood vessel, the thrombus at the expansion position is extracted through the first catheter interface connected to the negative pressure machine, and the thrombus in the blood vessel is removed while the blood vessel is expanded. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a schematic view of the shaft side of the application;

[0033] Figure 2 It is a schematic view of the shaft side of the balloon assembly of the application;

[0034] Figure 3 It is a schematic view of the shaft side of the head section catheter assembly of the application;

[0035] Figure 4 It is a schematic view of the shaft side of the first positive section of the balloon assembly of the application;

[0036] Figure 5 It is a schematic view of the shaft side of the second positive section of the balloon assembly of the application;

[0037] Figure 6 It is a schematic view of the shaft side of the balloon assembly of the application;

[0038] Figure 7 It is a schematic view of the shaft side of the balloon assembly of the application;

[0039] Figure 8 Side view of the tail catheter assembly of the present application;

[0040] Figure 9 Axial view of the bowl base of the present application;

[0041] Figure 10 Axial view of the drug storage protrusion of the present application;

[0042] Figure 11 Enlarged view of A of the present application;

[0043] Figure 12 Enlarged view of B of the present application;

[0044] Figure 13 Enlarged view of C of the present application.

[0045] Explanation of reference numbers in the figures: 1, balloon assembly; 2, head catheter assembly; 3, middle catheter; 4, catheter sheath; 5, tail catheter assembly; 6, flexible head end; 101, balloon body; 102, clearing hose; 103, suction hose; 104, drug storage protrusion; 105, drug storage hole; 106, bowl base; 107, clearing hole; 108, containing hole; 201, head catheter body; 202, connecting hose; 203, containing groove; 204, pressure sensor; 205, developing ring; 501, tail catheter body; 502, first catheter interface; 503, second catheter interface. DETAILED DESCRIPTION

[0046] Embodiment, please refer to Figures 1-13 A balloon dilatation catheter for intracranial artery, comprising a balloon assembly 1, a head catheter assembly 2, a tail catheter assembly 5, a middle catheter 3 and a catheter sheath 4, a flexible head end 6 is fixedly arranged at the front end of the head catheter body 201, the tail catheter body 501 penetrates the inside of the catheter sheath 4, the length of the middle catheter 3 is greater than that of the head catheter body 201 and the tail catheter body 501, the flexible head end 6 is arranged at the front end of the head catheter body 201, is made of a super-soft thermoplastic elastomer which is softer than the head catheter body 201, and is in a conical shape, which minimizes the stimulation and damage to the blood vessel wall, making the head catheter assembly 2 safer when entering the blood vessel with a guide wire, the tail catheter body 501 penetrates the inside of the catheter sheath 4, limiting the tail catheter body 501 inside the catheter sheath 4, and allowing the head catheter body 201, the middle catheter 3 and the tail catheter body 501 to penetrate the catheter sheath 4 and enter the inside of the blood vessel.

[0047] Specifically, the balloon assembly 1 comprises a balloon body 101, two dredging hoses 102, a plurality of bowl-shaped bases 106 and a plurality of adsorption hoses 103, dredging holes 107 are arranged at the upper and lower middle parts of the front and rear ends of the balloon body 101, a plurality of accommodating holes 108 are uniformly arranged on the circumference of the balloon body 101, the outer sides of the plurality of bowl-shaped bases 106 are fixedly provided with medicine storage protrusions 104, two dredging hoses 102 are respectively arranged through the opposite sides of the four dredging holes 107, and the plurality of bowl-shaped bases 106 are respectively fixed in the plurality of accommodating holes 108.

[0048] Medicine storage holes 105 are arranged at the middle parts of the outer sides of the plurality of medicine storage protrusions 104, the inner side of the balloon body 101 is fixed to the circumference of the proximal catheter body 201 near the front end, the plurality of adsorption hoses 103 are arranged through the middle part of the circumference of the balloon body 101 in a ring shape, and the inner side of the plurality of adsorption hoses 103 is arranged through the circumference of the proximal catheter body 201 in a ring shape.

[0049] Further, the balloon body 101 is fixed to the circumference of the catheter body, the balloon body 101 is in an expanded state, the two ends of the balloon body 101 are designed in a tapered transition, the hard step is eliminated, the passability in the blood vessel is greatly improved, the dredging holes 107 are arranged at the front and rear ends of the balloon body 101, the dredging hoses 102 are arranged through the inside of the dredging holes 107, when the balloon body 101 is expanded in the blood vessel, the blood flows through the dredging hose 102 from the expanded blocked position to supply blood to the distal brain tissue, the time of safe expansion is prolonged, the risk of operation caused by interruption of blood supply is prevented, the blood flow in the blood vessel is not affected during the expansion of the blood vessel, the bowl-shaped base 106 is fixed in the accommodating hole 108, the accommodating hole 108 is matched with the bowl-shaped base 106 in shape, the bowl-shaped base 106 communicates with the balloon body 101, the medium fills to form elastic buffering during expansion, the bowl-shaped base 106 is fixedly connected with the medicine storage protrusion 104, the anti-proliferative drug and the antispasmodic drug are pre-stored in the inside of the medicine storage protrusion 104, during the expansion of the balloon body 101, the medicine storage protrusion 104 is deformed by extruding the bowl-shaped base 106, the drug is discharged on the blood vessel wall through the medicine storage hole 105, the blood vessel restenosis and vasospasm are prevented, the effect of the expansion of the blood vessel is improved, the medicine storage protrusion 104 can also increase the friction force of the blood vessel to prevent displacement, since the medicine storage protrusion 104 is made of super-soft thermoplastic elastomer, the surface of the medicine storage protrusion 104 increases the friction of the blood vessel without causing damage to the blood vessel wall;

[0050] The adsorption hose 103 is attached to the blood vessel wall at the entrance when it is expanded, and the adsorption hose 103 penetrates the balloon body 101 and the head section catheter body 201, so that the thrombus at the attachment position of the adsorption hose 103 can be adsorbed by negative pressure, thereby improving the efficiency of thrombus removal in the blood vessel. Not only can the blood vessel be expanded to make the blood flow, but also the thrombus causing the blood vessel to be blocked can be removed. The adsorption hose 103 and the dredging hose 102 are made of fluorinated ethylene propylene. When the balloon body 101 is not expanded, the adsorption hose 103 and the dredging hose 102 are in a crumpled state inside the balloon body 101, which does not affect the movement of the balloon body 101 in the blood vessel driven by the head section catheter body 201. During the expansion of the balloon body 101, the adsorption hose 103 and the dredging hose 102 gradually change from the crumpled state to the cylindrical pipe. After the expansion of the balloon body 101 is completed, the blood flow and the adsorption of the thrombus are automatically adapted.

[0051] Specifically, the head section catheter assembly 2 includes a head section catheter body 201, two developing rings 205, and a connecting hose 202. The head section catheter body 201 is provided with two accommodating grooves 203 spaced apart at the front end around the periphery. The pressure sensor 204 is fixedly arranged inside each of the two accommodating grooves 203.

[0052] The two developing rings 205 are fixed around the periphery of the head section catheter body 201 and located at opposite ends of the two accommodating grooves 203. The outer sides of the two developing rings 205 are respectively pressed against the inner side of the balloon body 101.

[0053] Further, the accommodating grooves 203 of the head section catheter assembly 2 are annular, and the pressure sensor 204 is placed inside the accommodating grooves 203. When the balloon body 101 expands, the pressure generated by the balloon body 101 is monitored to avoid excessive expansion of the balloon body 101, which can cause the blood vessel to rupture. By monitoring the pressure of the balloon body 101 in real time and observing the state of the blood vessel through X-ray, the expansion pressure of the balloon body 101 can be accurately adjusted to ensure the safety of the operation process and prevent medical accidents caused by blood vessel damage. The developing ring 205 is pressed against the inner side of the balloon body 101, so that medical staff can clearly understand the positional relationship between the balloon body 101 and the diseased blood vessel through X-ray imaging of the developing ring 205, accurately expand the balloon body 101 at the position of the stenosis of the blood vessel, and prevent the balloon body 101 from not fully supporting the position of the stenosis of the blood vessel after expansion, thereby improving the success rate of blood vessel expansion.

[0054] Specifically, the tail section catheter assembly 5 includes a tail section catheter body 501, and a first catheter interface 502 fixedly arranged at the rear end of the tail section catheter body 501. A second catheter interface 503 is penetratingly arranged on the upper surface of the tail section catheter body 501 around the periphery.

[0055] The inlet of the connecting hose 202 passes through the inside of the balloon body 101. The connecting hose 202 is embedded in the wall of the head section catheter body 201, the middle section catheter 3, and the tail section catheter body 501. The head section catheter body 201, the middle section catheter 3, and the tail section catheter body 501 are fixedly connected to each other. The inner sides of the head section catheter body 201, the middle section catheter 3, and the tail section catheter body 501 are all provided with axially penetrating guide wire channels of the same diameter. The head section catheter body 201 is made of ultra-soft polyurethane, the middle section catheter 3 is made of medium-hardness Pebax and sparse stainless steel braided mesh, and the tail section catheter body 501 is made of high-hardness nylon and high-density stainless steel braided mesh.

[0056] Furthermore, the first catheter interface 502 facilitates guidewire entry and thrombus removal, while the second catheter interface 503 facilitates connection to a syringe and pressure pump. A connecting tubing 202 passes through the inner side of the balloon body 101 and is embedded within the walls of the head section catheter body 201, the middle section catheter 3, and the tail section catheter body 501. A syringe can be connected to the second catheter interface 503. Air is expelled from the balloon body 101 through the connecting tubing 202, and contrast agent is injected. After contrast agent injection, the balloon body 101 expands within the blood vessel by connecting to the pressure pump through the second catheter interface 503. The head section catheter body 201, the middle section catheter 3, and the tail section catheter body 501 are fixedly connected in pairs to form integral catheters of different diameters. Guidewire channels of the same diameter facilitate guidewire passage. The head section catheter body 201 is composed of… Made of ultra-soft polyurethane, it conforms to the natural curvature of blood vessels to the maximum extent, achieving non-invasive passage. The mid-section catheter 3 is made of medium-hardness Pebax and sparse stainless steel braided mesh, which can better absorb and transmit torque, while providing a certain amount of support to accurately execute the doctor's operation for rotation. The tail catheter body 501 is made of high-hardness nylon and high-density stainless steel braided mesh to prevent bending and wrinkling in the push path, ensuring that the thrust and response are directly transmitted to the head catheter body 201. The head catheter body 201, mid-section catheter 3 and tail catheter body 501 have different diameters, with the diameter increasing from the head catheter body 201 to the tail catheter body 501. This makes it easier for the head catheter body 201 to enter the narrow blood vessel position and prevents the blood vessel from being too narrow to expand.

[0057] The application uses the following steps: when treating intracranial artery stenosis, first puncture the artery, place the catheter sheath 4 into the blood vessel, then push the tail section catheter body 501 to drive the middle section catheter 3 to send the head section catheter body 201 to the target blood vessel along the guide wire, the flexible head end 6 at the front end of the head section catheter body 201 ensures that it can smoothly pass through the aortic arch and the tortuous intracranial blood vessels to reach the lesion site without damaging the blood vessels along the way, the second catheter interface 503 is connected with a syringe to pass the contrast agent through the connecting hose 202 to the inside of the balloon body 101, the contrast agent here is diluted contrast agent, which needs to be diluted with physiological saline in proportion, after dilution, the osmotic pressure of the contrast agent can be reduced, the stimulation to the endothelium of the intracranial blood vessels is reduced, at the same time, the contrast agent can be developed under the image, the balloon expansion shape and position are observed in real time to avoid blind operation, according to the development ring 205 around the head section catheter body 201, the position of the balloon body 101 and the stenosis blood vessel is clear under the image guidance, the balloon body 101 is opposite to the stenosis blood vessel, the second catheter interface 503 is connected with a pressure pump, the balloon body 101 is expanded through the connecting hose 202, and the pressure of the balloon body 101 is monitored in real time through the pressure sensor 204, a pressure threshold alarm function is designed, when the pressure exceeds the preset value, the liquid filling is automatically stopped, the safety of the operation is improved, at the same time of expansion, the medicine storage protrusion 104 connected with the bowl-shaped base 106 extrudes the blood vessel wall, the medicine storage protrusion 104 after extrusion releases the pre-stored anti-proliferative drug and antispasmodic drug through the medicine storage hole 105, prevents the blood vessel from being restenosed and vasospasm, and the medicine storage protrusion 104 extrudes the blood vessel wall to increase the friction to prevent the balloon body 101 from being displaced, after the stenosis blood vessel is expanded, the partial blood is circulated through the dredging hose 102 to supply blood to the distal brain tissue, and the time of safe expansion is prolonged.

[0058] After the blood vessel is expanded, the inlet of the adsorption hose 103 is attached to the blood vessel wall, when there is a thrombus on the blood vessel wall, the first catheter interface 502 is connected with a negative pressure machine, the adsorption hose 103 discharges the thrombus into the inside of the head section catheter body 201, the thrombus on the blood vessel wall is removed, and the removed thrombus is discharged and cleaned through the head section catheter body 201, the middle section catheter 3 and the tail section catheter body 501, the restenosis after the blood vessel expansion is reduced, and the stenosis blood vessel expansion and thrombus removal are simultaneously realized.

[0059] The basic principles, main features and advantages of the application are shown and described above. It should be understood by those skilled in the art that the application is not limited by the above examples, the above examples and descriptions in the specification are only preferred examples of the application, and are not used to limit the application, various changes and improvements of the application can be made without departing from the spirit and scope of the application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the application is defined by the appended claims and their equivalents.

Claims

1. A balloon dilatation catheter for intracranial artery, comprising a balloon assembly (1), a head section catheter assembly (2), a tail section catheter assembly (5), a middle section catheter (3) and a catheter sheath (4), characterized in that: the balloon assembly (1) comprises a balloon body (101), two dredging hoses (102), a plurality of bowl-shaped bases (106) and a plurality of adsorption hoses (103), the middle part of the balloon body (101) is provided with dredging holes (107) at the upper and lower ends, a plurality of accommodating holes (108) are uniformly provided on the circumference of the balloon body (101), a plurality of medicine storage protrusions (104) are fixedly arranged on the outer side of the bowl-shaped base (106), and a medicine storage hole (105) is formed in the middle part of the outer side of the medicine storage protrusion (104); the head section catheter assembly (2) comprises a head section catheter body (201), two developing rings (205) and a connecting hose (202), two accommodating grooves (203) are spaced apart and provided on the circumference of the head section catheter body (201), and a pressure sensor (204) is fixedly arranged in the accommodating groove (203); the tail section catheter assembly (5) comprises a tail section catheter body (501), a first catheter connector (502) is fixedly arranged at the rear end of the tail section catheter body (501), and a second catheter connector (503) is penetratingly arranged on the upper end face of the tail section catheter body (501); the head section catheter body (201) is made of super-soft polyurethane, the middle section catheter (3) is made of medium-hardness Pebax and sparse stainless steel woven mesh, and the tail section catheter body (501) is made of high-hardness nylon and high-density stainless steel woven mesh.

2. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: Two dredging hoses (102) are penetratingly arranged on the opposite side of the two dredging holes (107), respectively, and a plurality of bowl-shaped bases (106) are fixedly arranged in the plurality of accommodating holes (108).

3. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: The inner side of the balloon body (101) is fixedly arranged on the circumference of the head section catheter body (201) near the front end.

4. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: A plurality of adsorption hoses (103) are penetratingly arranged in the middle part of the circumference of the balloon body (101) in a ring shape, and the inner side of the adsorption hose (103) is penetratingly arranged on the circumference of the head section catheter body (201) in a ring shape.

5. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: Two developing rings (205) are fixedly arranged on the circumference of the head section catheter body (201) and located at the opposite end of the two accommodating grooves (203), and the outer side of the developing ring (205) is extruded on the inner side of the balloon body (101).

6. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: The inlet of the connecting hose (202) is penetratingly arranged on the inner side of the balloon body (101), and the connecting hose (202) is embeddedly arranged in the pipe wall of the head section catheter body (201), the middle section catheter (3) and the tail section catheter body (501).

7. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: The head section catheter body (201), the middle section catheter (3) and the tail section catheter body (501) are fixedly connected with each other, and the inner side of the head section catheter body (201), the middle section catheter (3) and the tail section catheter body (501) are provided with a guidewire channel which is axially penetrating and has the same diameter.

8. The balloon dilatation catheter for intracranial arteries according to claim 1, characterized in that: The head section conduit body (201) is fixedly provided with a flexible head end (6) at the front end, and the tail section conduit body (501) penetrates inside the conduit sheath (4).

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