Cerebrovascular angiography catheter device

Abstract

The utility model discloses a cerebrovascular angiography catheter device which comprises a first catheter, a rotating mechanism connected with the first catheter, a second catheter with one end movably arranged in the rotating mechanism, a side tube arranged on one side of the second catheter, a self-locking mechanism connected to the lower end of the second catheter and a guide wire, and the guide wire penetrates through the first catheter, the second catheter and the self-locking mechanism. The first end of the first locking shell is connected with the second catheter, the second locking shell is connected with the second end of the first locking shell, the locking inner core is installed in the second locking shell, a plurality of elastic locking parts are arranged outside the locking inner core, and the guide wire is arranged in the elastic locking parts in a penetrating mode. The elastic locking part is close to the first end of the first locking shell, the locking inner core can be matched with the first locking shell to lock the guide wire, the guide wire is released and locked when the elastic locking part is far away from the first end, a contrast agent can be added without completely retreating from the guide wire, the supporting force of the first catheter is enhanced, and the situation that the catheter falls off is reduced; angiography can be conveniently and smoothly completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a cerebral angiography catheter device. Background Art

[0002] Cerebral angiography is a imaging technique that injects iodine-containing contrast agent into the common carotid artery, internal and external carotid arteries, and vertebral arteries through an interventional method, and shows the morphology, location, distribution, and path of cerebral arteries, draining veins, and venous sinuses at different times through continuous DSA (Digital Subtraction Angiography).

[0003] Currently, when injecting contrast agent into the catheter, the guide wire inside the catheter needs to be withdrawn from the catheter lumen to prevent the moving guide wire from accidentally entering the patient's blood vessel and endangering the patient's safety. However, after the guide wire is withdrawn, the supporting force of the catheter decreases, and there is a risk of catheter dislodgment, resulting in angiography failure. Summary of the Utility Model

[0004] Aiming at the technical problem that when injecting contrast agent in the prior art, after the guide wire is withdrawn from the catheter, the supporting force of the catheter decreases and the catheter is prone to dislodgment, resulting in angiography failure, the utility model provides a cerebral angiography catheter device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A cerebral angiography catheter device includes a first catheter, a rotating mechanism fixedly connected to the lower end of the first catheter, a second catheter with one end movably arranged in the rotating mechanism and capable of communicating with the first catheter, a side tube arranged on one side of the second catheter and internally communicating with the second catheter, a self-locking mechanism detachably connected to the lower end of the second catheter and internally communicating with the second catheter, and a guide wire. A through cavity for the guide wire to pass through is formed after the inner cavity of the first catheter, the inner cavity of the second catheter, and the inner cavity of the self-locking mechanism communicate with each other. The side tube has two connection ports communicating with the inner cavity of the side tube. The self-locking mechanism includes a first locking housing detachably connected to the first end of the second catheter, a second locking housing connected to the second end of the first locking housing, and a locking inner core installed in the second locking housing with several elastic locking parts exposed outside the second locking housing. The guide wire passes through the elastic locking parts. When the elastic locking parts approach the first end of the first locking housing, the locking inner core can cooperate with the first locking housing to lock the guide wire. When the elastic locking parts move away from the first end of the first locking housing, the locking inner core can release the locked guide wire.

[0007] Further, the rotating mechanism includes a rotating housing, and a connecting cylinder disposed within the rotating housing and having an upper end communicating with the interior of the first conduit. The lower end of the connecting cylinder communicates with the second conduit located within the rotating housing.

[0008] Further, the second conduit is sleeved within the rotating housing. The outer wall of the second conduit is provided with a first annular platform, a second annular platform, and a third annular platform that are sequentially arranged at intervals from top to bottom and are all located within the rotating housing. An annular first sealing rubber ring with a bottom surface abutting against the first annular platform is sleeved on the end of the second conduit. After the lower end of the connecting cylinder enters the first sealing rubber ring, it communicates with the second conduit, and the lower end of the connecting cylinder can also horizontally rotate within the first sealing rubber ring.

[0009] An annular flange is accommodated between the first annular platform and the second annular platform, and the annular flange can horizontally rotate between the first annular platform and the second annular platform. The annular flange protrudes from the inner wall of the rotating housing towards the second conduit.

[0010] The bottom surface of the third annular platform abuts against the inner bottom surface of the rotating housing, and an annular second sealing rubber ring with a bottom surface abutting against the third annular platform is clamped on the outer wall of the second conduit.

[0011] Further, the first conduit includes a soft tube body and a rigid connector disposed at the lower end of the soft tube body. The inner cavity of the soft tube body communicates with the inner cavity of the rigid connector.

[0012] Further, the locking inner core further includes a cylindrical core rod with an outer wall fixedly connected to the inner wall of the second locking housing. The upper end of the core rod is exposed outside the second locking housing. The upper end of the core rod has a plurality of branch portions arranged at intervals. One end of each of the plurality of branch portions is correspondingly connected to an elastic locking portion. The plurality of elastic locking portions are arranged at intervals around the center of the core rod and enclose a through cavity. The through cavity communicates with the inner cavity of the core rod to form a locking cavity for threading the guide wire. When an external force is applied to the elastic locking portions, the plurality of elastic locking portions approach each other to lock the guide wire.

[0013] Further, the elastic locking portion is composed of a first inclined portion, a vertical portion, and a second inclined portion. The first inclined portion is a structure with a gradually increasing cross-sectional area from top to bottom. One end of the vertical portion is connected to the first inclined portion, and the other end is connected to the second inclined portion.

[0014] Furthermore, the first locking shell is threadedly connected to the second catheter through a first connecting portion, and the first locking shell has a push chamber and a release chamber connected to the push chamber, the end of the push chamber close to the second catheter is defined as the first end, and the end away from the second catheter is defined as the second end, the push chamber is a variable cross-section cavity with a cross-section gradually increasing from the first end to the second end, and the cross-sectional area of ​​the release chamber is greater than the cross-sectional area of ​​the end face of the second end of the push chamber.

[0015] Furthermore, the second locking shell includes a shell body, an annular platform arranged around the outer periphery of the shell body, and a second connecting portion fixedly connected to the top surface of the shell body, the second connecting portion is fixedly connected to the core rod, the end extending out of the second connecting portion is connected to the elastic locking portion, and the second connecting portion can be threadedly connected to the release chamber;

[0016] When the second connecting portion moves toward the direction close to the pushing cavity, the plurality of elastic locking portions can enter the pushing cavity, and the cavity wall of the pushing cavity squeezes the plurality of elastic locking portions toward the center of the locking cavity to lock the guide wire;

[0017] When the second connecting portion moves in a direction away from the pushing cavity, the elastic locking portion can be disengaged from the pushing cavity, and the elastic locking portion returns to a state where no external force is applied to release the locked guide wire.

[0018] Furthermore, a knob seat is provided on the side tube, and a knob switch for controlling the on-off of liquid in the two connecting ports is installed on the knob seat.

[0019] In summary, the beneficial effects of the utility model are as follows: 1. It has a self-locking mechanism. When the guidewire is not completely withdrawn, the position can be locked, so that the guidewire continues to be located in the first catheter. During angiography, it can not only prevent the guidewire from entering the blood vessel and damaging the patient's vascular structure, but also allow the first catheter to have a stronger supporting force to reduce the occurrence of tube detachment, improve the success rate of angiography, and make the operation more convenient. In addition, the guidewire is no longer required to be pulled out during angiography, which simplifies the surgical steps, saves the operation time, and improves the surgical efficiency. 2. When operating the self-locking mechanism to lock the guidewire, by rotating the shell body in the second locking shell, the elastic locking part can be controlled to enter the push cavity to lock the guidewire, or withdraw from the push cavity to release the guidewire. The operation steps are simple and convenient. 3. By rotating the rotating mechanism, the first catheter can be rotated during the operation, which improves the controllability of the head end of the first catheter and allows the first catheter to be operated more flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a structural schematic diagram of a cerebral angiography catheter device.

[0021] Figure 2 is Figure 1 the vertical sectional view of

[0022] Figure 3 is Figure 1 the top view of the locking inner core in

[0023] Figure 4 the three-dimensional structure schematic diagram of the locking inner core in the present utility model.

[0024] In the figure, 100 - the first catheter, 110 - the soft tube body, 120 - the rigid joint, 200 - the rotating mechanism, 210 - the rotating outer shell, 211 - the annular flange, 220 - the connecting cylinder, 300 - the second catheter, 310 - the first annular platform, 320 - the second annular platform, 330 - the third annular platform, 340 - the first sealing rubber ring, 350 - the second sealing rubber ring, 400 - the side tube, 410 - the connecting port, 420 - the knob seat, 421 - the knob switch, 500 - the self-locking mechanism, 510 - the first locking outer shell, 511 - the first connecting part, 512 - the pushing cavity, 513 - the releasing cavity, 520 - the second locking outer shell, 521 - the shell main body, 522 - the annular platform, 523 - the second connecting part, 530 - the locking inner core, 531 - the elastic locking part, 531A - the first inclined part, 531B - the vertical part, 531C - the second inclined part, 532 - the core rod, 5320 - the branch part, 533 - the locking cavity, 600 - the guide wire. Specific embodiments

[0025] The present utility model will be further described below with reference to specific illustrations.

[0026] Please refer to Figure 1 and Figure 2, the present utility model provides a cerebral angiography catheter device, which includes a first catheter 100, a rotating mechanism 200 fixedly connected to the lower end of the first catheter 100, a second catheter 300 with one end movably disposed in the rotating mechanism 200 and capable of communicating with the first catheter 100, a side tube 400 disposed on one side of the second catheter 300 and communicating with the inside of the second catheter 300, a self-locking mechanism 500 detachably connected to the lower end of the second catheter 300 and having an internal cavity communicating with the second catheter 300, and a guide wire 600. A through cavity for the guide wire 600 to pass through is formed after the inner cavities of the first catheter 100, the second catheter 300, and the self-locking mechanism 500 communicate with each other. The side tube 400 has two connection ports 410 communicating with the inner cavity of the side tube 400. The self-locking mechanism 500 includes a first locking housing 510 with a first end detachably connected to the second catheter 300, a second locking housing 520 connected to the second end of the first locking housing 510, and a locking inner core 530 installed in the second locking housing 520 with a plurality of elastic locking portions 531 exposed outside the second locking housing 520. The guide wire 600 passes through the elastic locking portions 531. When the elastic locking portions 531 approach the first end of the first locking housing 510, the locking inner core 530 can cooperate with the first locking housing 510 to lock the guide wire 600. When the elastic locking portions 531 are away from the first end of the first locking housing 510, the locking inner core 530 can release the locked guide wire 600. Before injecting the contrast agent into the first catheter 100 from the position of the connection port 410 of the side tube 400, the movable guide wire 600 is pulled until the guide wire 600 retracts into the through cavity, and then the position of the guide wire 600 is locked by using the self-locking mechanism 500 to prevent the guide wire 600 from moving towards the outlet end of the first catheter 100. The guide wire 600 does not need to be completely withdrawn but is locked in the through cavity, so that the supporting force of the first catheter 100 can be enhanced when adding the contrast agent, the occurrence of tube detachment can be reduced, and the angiography success rate can be improved.

[0027] The rotating mechanism 200 includes a rotating housing 210 and a connecting cylinder 220 disposed in the rotating housing 210 and having an upper end communicating with the inside of the first catheter 100. The lower end of the connecting cylinder 220 communicates with the second catheter 300 located in the rotating housing 210. The first catheter 100 is fixedly connected to the rotating mechanism 200, and the connection is stable and reliable.

[0028] The second catheter 300 is sleeved inside the rotating housing 200. On the outer wall of the second catheter 300, there are a first annular platform 310, a second annular platform 320, and a third annular platform 330 that are arranged at intervals from top to bottom and are all located inside the rotating housing 210. An annular first sealing rubber ring 340 with a bottom surface abutting against the first annular platform 310 is sleeved at the end of the second catheter 300. After the lower end of the connecting cylinder 220 enters the first sealing rubber ring 340, it communicates with the second catheter 300, and the lower end of the connecting cylinder 220 can also rotate horizontally inside the first sealing rubber ring 340. An annular flange 211 is accommodated between the first annular platform 310 and the second annular platform 320, and the annular flange 211 can rotate horizontally between the first annular platform 310 and the second annular platform 320. The annular flange 211 protrudes from the inner wall of the rotating housing 210 towards the second catheter 300. The bottom surface of the third annular platform 330 abuts against the inner bottom surface of the rotating housing 210, and an annular second sealing rubber ring 350 with a bottom surface abutting against the third annular platform 330 is clamped on the outer wall of the second catheter 300. The rotating housing 210 can rotate 360° around the central axis of the second catheter 300. During the rotation process, the sleeved end of the connecting cylinder 230 and the second catheter 300 is located inside the first sealing rubber ring 340 to prevent liquid at the connection from leaking outwards. The annular flange 211 cooperates with the first annular platform 310 and the second annular platform 320 to prevent the rotating housing 210 from separating from the second catheter 300. After the second sealing rubber ring 350 is provided on the third annular platform 330, the sealing performance inside the rotating housing 210 is further improved to prevent liquid from leaking outside the rotating housing 210. During the imaging process, the flexibly rotating rotating housing 210 can drive the first catheter 100 to rotate flexibly, making the imaging operation more convenient.

[0029] The first catheter 100 includes a soft tube body 110 and a rigid joint 120 provided at the lower end of the soft tube body 110. The inner cavity of the soft tube body 110 communicates with the inner cavity of the rigid joint 120. Anti-slip lines are provided on the outer wall of the rigid joint 120 to enhance the anti-slip performance, and it is not easy to fall off during the holding operation.

[0030] A knob base 420 is provided on the side tube 400, and a knob switch 421 for controlling the on-off of the liquid in the two connection ports 410 is installed on the knob base 420. One of the connection ports 410 can be used to convey the contrast agent into the first catheter 100, and the other connection port 410 can be used to perfusion clear water into the first catheter 100. By rotating the knob switch 421 to control the on-off of the liquid in different connection ports 410, the operation is convenient. Moreover, since the second catheter 300 itself has two connection ports 410, it is not necessary to assemble a three-way valve or a Y-valve to complete the imaging, saving medical consumables.

[0031] The first locking housing 510 is screwed to the second catheter 300 through a first connecting portion 511, with the threads tightly engaged, so that the self-locking mechanism 500 will not easily fall off, and has high reliability.

[0032] The first locking housing 510 has a pushing cavity 512 and a release cavity 513 communicating with the pushing cavity 512. One end of the pushing cavity 512 close to the second catheter 300 is defined as the first end, and the end far from the second catheter 300 is defined as the second end. The pushing cavity 512 is a variable cross-section cavity with a gradually increasing cross-section from the first end to the second end, and the cross-sectional area of the release cavity 513 is larger than the cross-sectional area of the end face of the second end of the pushing cavity 512. The elastic locking portion 531 will be extruded by an external force in the pushing cavity 512 and retract into the release cavity 513 when the external force is withdrawn, and the elastic locking portion 531 returns to its initial state.

[0033] Please refer to Figure 4 , the locking inner core 530 further includes a cylindrical core rod 532 whose outer wall is fixedly connected to the inner wall of the second locking housing 520. The upper end of the core rod 532 is exposed outside the second locking housing 520, and the upper end of the core rod 532 has a plurality of branch portions 5320 arranged at intervals. One end of each of the plurality of branch portions 5320 is correspondingly connected to an elastic locking portion 531. The plurality of elastic locking portions 531 are arranged at intervals around the center of the core rod 532 and enclose a through cavity, and the through cavity communicates with the inner cavity of the core rod 532 to form a locking cavity 533 (the locking cavity 533 is a partial penetration cavity) for threading the guide wire 600. When an external force is applied to the elastic locking portion 531, the plurality of elastic locking portions 531 approach each other to lock the guide wire 600. Please refer to Figure 3 , in the top view projection plane, the elastic locking portion 531 is fan-shaped and evenly distributed around the central axis of the core rod 532, and uniform force application can lock the guide wire 600 more stably.

[0034] Please refer to Figure 4, the elastic locking portion 531 is composed of a first inclined portion 531A, a vertical portion 531B, and a second inclined portion 531C. The first inclined portion 531A has a structure with a gradually increasing cross-sectional area from top to bottom. One end of the vertical portion 531B is connected to the first inclined portion 531A, and the other end is connected to the second inclined portion 531C. During the process of locking the guide wire 600, it is the first inclined portion 531A that first enters the pushing cavity 512. The first inclined portion 531A has a structure with a gradually increasing cross-sectional area from top to bottom, similar to a wedge. This design makes the resistance encountered in the initial stage relatively small when the elastic locking portion 531 enters the pushing cavity 512. As the first inclined portion 531A penetrates deeper, the cross-sectional area gradually increases, enabling a smooth transition to a larger space (i.e., the vertical portion 531B), avoiding jamming or damage caused by a sudden increase in resistance, and allowing the elastic locking portion 531 to enter the pushing cavity 512 more smoothly.

[0035] The second locking housing 520 includes a housing main body 521, an annular platform 522 provided around the outer periphery of the housing main body 521, and a second connecting portion 523 fixed to the top surface of the housing main body 521. The second connecting portion 523 is fixedly connected to the core rod 532, and the end extending out of the second connecting portion 523 is connected to the elastic locking portion 531. The second connecting portion 523 can be screwed to the release cavity 513. When the second connecting portion 523 moves towards the direction close to the pushing cavity 512, several elastic locking portions 531 can enter the pushing cavity 512, and the cavity wall of the pushing cavity 512 squeezes several elastic locking portions 531 to move towards the center of the locking cavity 533 to lock the guide wire 600. When the second connecting portion 523 moves towards the direction away from the pushing cavity 512, the elastic locking portion 531 can disengage from the pushing cavity 512, and the elastic locking portion 531 returns to the state without external force applied to release the locked guide wire 600. Rotating the housing main body 521 forward can control the elastic locking portion 531 to enter the pushing cavity 512. When the elastic locking portion 531 continuously enters the pushing cavity 512 with a gradually increasing cross-sectional area from the first end to the second end, the cavity wall of the pushing cavity 512 will push the elastic locking portion 531 towards the center direction of the core rod 532, that is, the elastic locking portion 531 surrounding the guide wire 600 moves towards the direction close to the guide wire 600 until the guide wire 600 is locked. When the housing main body 521 is rotated in the reverse direction, the elastic locking portion 531 will withdraw from the pushing cavity 512, and the elastic locking portion 531 is located in the release cavity 513, and the guide wire 600 can then resume free movement.

[0036] To facilitate holding the housing main body 521 to operate the locking or releasing of the guide wire 600, anti-slip patterns are also provided on the outer wall of the housing main body 521, enabling a more stable grip when using the housing main body 521 and reducing operation errors and time waste caused by slipping.

[0037] This catheter device: First, it has a self-locking mechanism 500. When the guide wire 600 is not completely withdrawn, its position can be locked, allowing the guide wire 600 to continue to be located within the first catheter 100. During angiography, it can not only prevent the guide wire 600 from entering the blood vessel and damaging the patient's cerebrovascular vessels, but also enable the first catheter 100 to have a stronger supporting force, thereby reducing the occurrence of catheter dislodgment, improving the angiography success rate, and making the operation more convenient. Moreover, during angiography, the guide wire 600 does not need to be withdrawn, simplifying the surgical procedure, saving the surgical duration, and improving the surgical efficiency. Second, when operating the self-locking mechanism 500 to lock the guide wire 600, by rotating the housing main body 521 in the second locking housing 520, the elastic locking portion 531 can be controlled to enter the pushing cavity 512 to lock the guide wire 600, or exit the pushing cavity 512 to release the guide wire 600, and the operation steps are simple and convenient. Third, through the rotation of the rotating mechanism 200, the first catheter 100 can rotate during the operation, which is flexible and practical in use.

[0038] The above are only the implementation manners of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structures made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, are similarly within the patent protection scope of the present utility model.

Claims

1. A cerebral angiography catheter device, characterized in that: The invention comprises a first catheter, a rotating mechanism fixedly connected to the lower end of the first catheter, a second catheter with one end movably arranged in the rotating mechanism and capable of communicating with the first catheter, a side tube arranged at one side of the second catheter and communicating with the interior of the second catheter, a self-locking mechanism detachably connected to the lower end of the second catheter and communicating with the interior of the second catheter, and a guide wire, wherein the inner cavity of the first catheter, the inner cavity of the second catheter and the inner cavity of the self-locking mechanism are connected to form a through cavity for the guide wire to pass through, and the side tube has two connection ports communicating with the inner cavity of the side tube; the self-locking mechanism comprises a first locking shell detachably connected to the second catheter at a first end, a second locking shell connected to the second end of the first locking shell, and a locking inner core installed in the second locking shell and with a plurality of elastic locking parts exposed outside the second locking shell, and the guide wire is passed through the elastic locking part; When the elastic locking portion is close to the first end of the first locking shell, the locking inner core can cooperate with the first locking shell to lock the guide wire. When the elastic locking portion is away from the first end of the first locking shell, the locking inner core can release the locked guide wire.

2. The cerebral angiography catheter device according to claim 1, characterized in that: The rotating mechanism includes a rotating shell, and a connecting tube which is arranged in the rotating shell and the upper end of which is communicated with the inside of the first conduit, and the lower end of the connecting tube is communicated with the second conduit located in the rotating shell.

3. The cerebral angiography catheter device according to claim 2, characterized in that: The second conduit is sleeved in the rotating housing, and the outer wall of the second conduit is provided with a first ring platform, a second ring platform and a third ring platform which are arranged in sequence from top to bottom and are all located in the rotating housing. The end of the second conduit is sleeved with an annular first sealing rubber ring whose bottom surface abuts against the first ring platform. The lower end of the connecting tube enters the first sealing rubber ring and is connected with the second conduit, and the lower end of the connecting tube can also rotate horizontally in the first sealing rubber ring. An annular flange is accommodated between the first ring stage and the second ring stage, and the annular flange can rotate horizontally between the first ring stage and the second ring stage, and the annular flange protrudes from the inner wall of the rotating shell toward the direction close to the second conduit; The bottom surface of the third ring platform abuts against the inner bottom surface of the rotating shell, and an annular second sealing rubber ring with a bottom surface abutting against the third ring platform is clamped on the outer wall of the second conduit.

4. The cerebral angiography catheter device according to claim 3, characterized in that: The first catheter includes a soft tube body and a hard joint arranged at the lower end of the soft tube body, and the inner cavity of the soft tube body is communicated with the inner cavity of the hard joint.

5. The cerebral angiography catheter device according to claim 1, characterized in that: The locking inner core also includes a cylindrical core rod whose outer wall is fixedly connected to the inner wall of the second locking outer shell, the upper end of the core rod is exposed outside the second locking outer shell, the upper end of the core rod has a plurality of branch parts arranged at intervals, and the upper ends of the plurality of branch parts are connected to an elastic locking part one by one, and the plurality of elastic locking parts are arranged at intervals around the center of the core rod and enclose a through cavity, the through cavity is connected with the inner cavity of the core rod to form a locking cavity for passing the guide wire, and when external force is applied to the elastic locking part, the plurality of elastic locking parts move closer to each other to lock the guide wire.

6. The cerebral angiography catheter device according to claim 5, characterized in that: The elastic locking portion is composed of a first inclined portion, a vertical portion and a second inclined portion. The first inclined portion is a structure with a gradually increasing cross-sectional area from top to bottom. One end of the vertical portion is connected to the first inclined portion, and the other end is connected to the second inclined portion.

7. The cerebral angiography catheter device according to claim 6, characterized in that: The first locking shell is threadedly connected to the second catheter through a first connecting portion. The first locking shell has a push chamber and a release chamber connected to the push chamber. The end of the push chamber close to the second catheter is defined as the first end, and the end away from the second catheter is defined as the second end. The push chamber is a variable-section cavity with a cross-section gradually increasing from the first end to the second end, and the cross-sectional area of ​​the release chamber is greater than the cross-sectional area of ​​the end face of the second end of the push chamber.

8. The cerebral angiography catheter device according to claim 7, characterized in that: The second locking shell comprises a shell body, an annular platform arranged around the outer periphery of the shell body, and a second connecting portion fixedly connected to the top surface of the shell body, the second connecting portion is fixedly connected to the core rod, the end extending out of the second connecting portion is connected to the elastic locking portion, and the second connecting portion can be screwed to the release chamber; When the second connecting portion moves toward the direction close to the pushing cavity, the plurality of elastic locking portions can enter the pushing cavity, and the cavity wall of the pushing cavity squeezes the plurality of elastic locking portions toward the center of the locking cavity to lock the guide wire; When the second connecting portion moves in a direction away from the pushing cavity, the elastic locking portion can be disengaged from the pushing cavity, and the elastic locking portion returns to a state where no external force is applied to release the locked guide wire.

9. The cerebral angiography catheter device according to any one of claims 1 to 8, characterized in that: A knob seat is provided on the side tube, and a knob switch for controlling the on-off of liquid in the two connecting ports is installed on the knob seat.

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