Cerebrovascular angiography catheter device

Abstract

The invention discloses a cerebrovascular angiography catheter device, which belongs to the technical field of medical equipment, and comprises a sheathing canal, a puncture needle connected with the sheathing canal, a limiting tube and an adjusting module, the limiting tube is fixed on the sheath tube; the adjusting module comprises a clamping block adjusting disc, a clamping assembly and a curved spring. The clamping block adjusting disc is arranged on the periphery of the sheathing canal. The opening and closing state of the sheathing canal is adjusted through the adjusting module, the sheathing canal can be adjusted to be in a completely-closed state through the adjusting module before puncture, after an operator holds the sheathing canal and pinches the liquid storage balloon for puncture, after blood enters the balloon, the sheathing canal is adjusted to have a certain opening degree, and a guide wire passes through, in the process, the operation is convenient, and the operation efficiency is greatly improved. The sprayed blood enters the balloon and is prevented from being sprayed out through a hole in the sheath tube, so that the guide wire implantation resistance can be adjusted, and the sprayed blood can be collected.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, in particular to a cerebral angiography catheter device. Background Art

[0002] The cerebral angiography surgery includes the process of inserting the puncture needle into the femoral artery. Usually the puncture needle is connected to the cannula. The medical staff holds the cannula in one hand, keeps the puncture needle at an angle of about 45° to the skin, and gently pushes it forward. After a certain amount of arterial blood is ejected, the guide wire is sent into the cannula. There should be no obvious resistance during the process of the guide wire being placed into the femoral artery through the cannula.

[0003] A Chinese patent with announcement number CN115400323A discloses a cerebral angiography catheter device, pointing out that when the catheter device in the prior art is used, the guide wire speed is too fast and the plaque will fall off, thereby causing the problem of cerebral thrombosis. This patent utilizes the reciprocating motion of the extrusion cylinder on the detachable adjustment mechanism to extrude the elastic deformation section, thereby achieving the adjustable radial size of the elastic deformation section.

[0004] The disadvantage of the above patent is that the detachable adjustment mechanism is more dependent on the subjective judgment of the operator during the adjustment process. Although the use of a tube body with a protrusion and an extrusion cylinder with a groove to cooperate with each other can achieve quantitative adjustment, it is difficult to operate with one hand during adjustment. When squeezing the cylinder during adjustment, a large force is required. After the extrusion protrusion is stuck in the corresponding groove, the entire device may be displaced, resulting in surgical errors. Therefore, the adjustment process should be carried out before the puncture needle is punctured. Therefore, a hole for the guide wire to pass through will be left in the adjusted catheter device. Therefore, during puncture, arterial blood will spray out of the hole and contaminate the surgical area.

[0005] A Chinese patent with announcement number CN115400330A discloses a cerebral angiography catheter device, pointing out that the catheter device in the prior art, when in use, relies on the spraying of blood to determine whether the puncture needle is accurately inserted into the artery, which can easily cause contamination of the surgical area. This patent uses a balloon to store the sprayed blood and determines whether the puncture needle is accurately inserted by observing the balloon.

[0006] However, although the above patent controls the opening and closing of the wire feeding channel by means of a baffle, it is not convenient to adjust the resistance during the insertion of the guide wire.

[0007] The combination of the technical solutions provided by the above two patents cannot simultaneously achieve the adjustment of the resistance of the guide wire during entry and the collection of the ejected blood.

[0008] Therefore, we propose a cerebral angiography catheter device to solve the above problems.

[0009] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0010] The object of the present invention is to provide a cerebral angiography catheter device to solve the problem raised in the above background technology that the current prior art cannot simultaneously achieve the adjustment of the resistance of the guide wire during entry and the collection of the ejected blood.

[0011] To achieve the above object, the present invention provides a cerebral angiography catheter device, comprising a sheath tube, a puncture needle connected to the sheath tube, the sheath tube is also provided with a liquid storage balloon, and also comprises: a limit tube and an adjustment module;

[0012] The limiting tube is fixed on the sheath tube;

[0013] The adjustment module includes a clamping block adjustment disk, a clamping assembly and a curved spring;

[0014] The clamp block adjustment disk is arranged on the periphery of the sheath tube, and the clamping assembly is arranged in the clamp block adjustment disk and penetrates into the gap between the clamp block adjustment disk and the sheath tube;

[0015] The clamping components are distributed in a circular array with the axis of the sheath tube as the center, the number of the curved springs is the same as the number of the clamping components, and the two ends of each curved spring are respectively connected to two adjacent clamping components;

[0016] The clamping block adjusting disk is provided with a concave ring at one end facing the limiting tube, and the concave ring is rotatably connected to the limiting tube;

[0017] The clamping block adjusting disk is also fixedly mounted with a knob.

[0018] Preferably, the sheath tube includes an adjustable tube section and a fixed tube section, which are connected to each other;

[0019] The puncture needle is connected to the adjustable tube segment;

[0020] The limiting pipe is fixedly mounted on the fixed pipe section.

[0021] Preferably, the position limiting tube comprises a tube body, and a clamping plate is provided at the end of the tube body facing the adjustable tube section, and the edge of the clamping plate is movably clamped in the concave ring;

[0022] The end surface of the tube body facing the adjustable tube section is also provided with a T-shaped groove, the T-shaped groove points to the center of the fixed tube section, and the number of the T-shaped grooves is the same as the number of the clamping components:

[0023] The clamping assembly is also inserted into the T-shaped groove.

[0024] Preferably, the clamping block adjustment plate comprises a side plate, a wavy path ring is provided in the middle of the side plate, and the side plate is movably mounted on the adjustable pipe section;

[0025] Preferably, the clamping assembly includes clamping blocks, the number of which is the same as the number of the curved springs, and both ends of each curved spring are fixedly connected to two adjacent clamping blocks respectively;

[0026] The clamping block is provided with an arc-shaped clamping plate on one side facing the adjustable pipe section, and a connecting rod is provided on the side away from the adjustable pipe section. The connecting rod passes through the wavy path ring and has a spherical shaft at the end.

[0027] A T-shaped limiting rod facing the tube body and perpendicular to the end surface of the side plate is also fixedly mounted on the clamping block, and the T-shaped limiting rod penetrates into the T-shaped groove.

[0028] Preferably, the wavy path ring includes bumps, the number of which is the same as that of the spherical shaft, and which are distributed in a circumferential array;

[0029] A sliding groove is provided in the middle of the protrusion;

[0030] The convex block has a convex arc and a concave arc, and there is a smooth transition between the convex arc and the concave arc;

[0031] The spherical shaft is in contact with the convex arc or the concave arc.

[0032] Preferably, a side of the side plate facing the tube body is provided with scales.

[0033] Preferably, the fixed pipe section is made of hard material.

[0034] Preferably, it further comprises a fastening module, wherein the fastening module comprises a fixed ring and a movable ring;

[0035] The fixed ring is fixedly mounted on the tube body, and the movable ring is fixedly mounted with a movable rod, and the movable rod is passed through the fixed ring;

[0036] The movable rod is provided with a fastening spring, and the two ends of the fastening spring are fixedly connected to the fixed ring and the movable ring respectively, and the movable ring is in contact with the side plate.

[0037] Preferably, a plane is also provided in the middle of the convex arc and is tangent to the adjustable pipe section;

[0038] There is a smooth transition between the convex arc and the plane.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) The present invention stores the blood ejected from the artery through a liquid storage balloon, and determines whether the puncture needle has penetrated the artery by observing the state of the balloon. The opening and closing state of the sheath is adjusted by an adjustment module. Before puncture, the sheath can be adjusted to a completely closed state through the adjustment module. The operator holds the sheath and squeezes the liquid storage balloon to perform puncture, and then adjusts the sheath to a certain opening after the blood enters the balloon to allow the guide wire to pass through. During this process, the ejected blood enters the balloon to avoid being ejected through the hole in the sheath. Therefore, the guide wire insertion resistance can be adjusted and the ejected blood can be collected.

[0041] (2) The present invention realizes quantitative adjustment of the adjustable tube segment by means of a limit tube, an adjustment module and a scale arranged on the sheath tube. In the initial state, the adjustable tube segment is in a completely closed state. Therefore, during the operation, the puncture needle can be inserted first, and then the opening of the adjustable tube segment can be adjusted. Moreover, the whole process can be performed with one hand, thereby improving the convenience of use.

[0042] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0044] Figure 2 It is a structural schematic diagram of the adjustment module and the knob of the present invention;

[0045] Figure 3 for Figure 2 Schematic diagram of the plan with the knob hidden;

[0046] Figure 4 for Figure 2 A plan view of the internal structure of

[0047] Figure 5 for Figure 3 A cross-sectional view of

[0048] Figure 6 It is a schematic diagram of the connection between the clamping assembly and the curved spring of the present invention;

[0049] Figure 7 It is a structural schematic diagram of the position limiting tube of the present invention;

[0050] Figure 8 for Figure 6 A cross-sectional view of

[0051] Fig. 9 for Figure 1 Side view of

[0052] Fig.10 This is a schematic diagram of the planar structure of Embodiment 2 of the present invention;

[0053] Fig.11 for Fig. 9 A magnified view of the structure at center A;

[0054] Fig.12 This is a schematic diagram of the internal structure of the adjustment module of Example 3 of the present invention.

[0055] In the figure: 1. sheath; 2. puncture needle; 3. fluid storage balloon; 4. limit tube; 5. adjustment module; 6. knob; 7. scale; 8. fastening module;

[0056] 11. Adjustable pipe section; 12. Fixed pipe section;

[0057] 41. tube body; 42. clamping plate; 43. T-shaped groove;

[0058] 51. Clamping block adjustment plate; 52. Clamping assembly; 53. Curved spring; 54. Concave ring;

[0059] 511, side plate; 512, wavy path ring;

[0060] 5121, convex block; 5122, slide groove; 5123, convex arc; 5124, concave arc; 5125, plane;

[0061] 521, clamping block; 522, arc-shaped splint; 523, connecting rod; 524, spherical shaft; 525, T-shaped limiting rod;

[0062] 81. Fixed ring; 82. Movable ring; 83. Movable rod; 84. Fastening spring. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. It should be pointed out that the drawings are schematic and not drawn to scale. For the sake of clarity and convenience in the figures, the relative sizes and proportions of the parts shown in the figures are exaggerated or reduced in size, and any size is only exemplary and not restrictive.

[0064] Embodiment 1:

[0065] See also Figure 1-Figure 4, a cerebral angiography catheter device, comprising: a sheath tube 1, a puncture needle 2 connected to the sheath tube 1, the sheath tube 1 is also provided with a liquid storage balloon 3, and also comprises: a limit tube 4 and an adjustment module 5; the limit tube 4 is fixed on the sheath tube 1; the adjustment module 5 comprises a clamping block adjustment disk 51, a clamping assembly 52 and a curved spring 53; the clamping block adjustment disk 51 is arranged on the periphery of the sheath tube 1, the clamping assembly 52 is arranged in the clamping block adjustment disk 51, and penetrates into the gap between the clamping block adjustment disk 51 and the sheath tube 1; the clamping assembly 52 is arranged in a circular array with the axis of the sheath tube 1 as the center, the number of the curved springs 53 is the same as the number of the clamping assemblies 52, and the two ends of each curved spring 53 are respectively connected to two adjacent clamping assemblies 52; a concave ring 54 is provided at one end of the clamping block adjustment disk 51 facing the limit tube 4, and the concave ring 54 is rotatably connected to the limit tube 4; the clamping block adjustment disk 51 is also fixedly installed with a knob 6.

[0066] By adopting the above-mentioned technical scheme, the sheath tube 1 is adjusted by utilizing the clamping assembly 52 distributed on the periphery of the sheath tube 1, the distributed curved springs 53 provide clamping force to the clamping assembly 52, the clamping block adjustment disk 51 provides the clamping assembly 52 with a supporting force to offset the tension of the curved spring 53, and provides the clamping assembly 52 with adjustment capability to adjust the inner diameter of the sheath tube 1. Therefore, when in use, adjustment can be achieved by turning the knob 6, and the sheath tube 1 can be maintained in a fully closed and fully open state. In the initial state, it is in a closed state. After puncture, when blood enters the liquid storage balloon 3, the knob 6 is turned to open the sheath tube 1 to allow the guide wire to pass.

[0067] See also Figure 7-8 The sheath 1 includes an adjustable tube section 11 and a fixed tube section 12, which are connected to each other; the puncture needle 2 is connected to the adjustable tube section 11; the limiting tube 4 is fixedly installed on the fixed tube section 12, the adjustable tube section 11 is made of elastic material, and the fixed tube section 12 is made of hard material, so the accuracy of adjustment can be ensured, the limiting tube 4 includes a tube body 41, and the end of the tube body 41 facing the adjustable tube section 11 is provided with a clamping disk 42, and the edge of the clamping disk 42 is movably clamped in the concave ring 54; the end surface of the tube body 41 facing the adjustable tube section 11 is also provided with a T-shaped groove 43, the T-shaped groove 43 points to the center of the fixed tube section 12, and the number is the same as the number of the clamping assembly 52: the clamping assembly 52 is also penetrated in the T-shaped groove 43.

[0068] The function of the T-shaped groove 43 is to limit the clamping assembly 52 so that the movement path of the clamping assembly 52 is the extension direction of the T-shaped groove 43 .

[0069] See also Figure 2-Figure 6Specifically, the clamping block adjustment disk 51 includes a side disk 511, a wavy path ring 512 is provided in the middle of the side disk 511, and the side disk 511 is movably mounted on the adjustable pipe section 11; the clamping assembly 52 is penetrated on the wavy path ring 512, and the clamping assembly 52 includes a clamping block 521, the number of which is the same as the number of the curved springs 53, and the two ends of each curved spring 53 are respectively fixedly connected to two adjacent clamping blocks 521; the side of the clamping block 521 facing the adjustable pipe section 11 is provided with an arc clamping plate 522, which is away from the adjustable pipe section 1 1 is provided with a connecting rod 523, the connecting rod 523 passes through the wavy path ring 512, and a spherical shaft 524 is provided at the end thereof; a T-shaped limiting rod 525 is fixedly mounted on the block 521, facing the tube body 41 and perpendicular to the end face of the side plate 511, and the T-shaped limiting rod 525 passes through the T-shaped groove 43, and the wavy path ring 512 includes a convex block 5121, the number of which is the same as the spherical shaft 524, and is distributed in a circumferential array; a slide groove 5122 is opened in the middle of the convex block 5121, and the slide groove 5122 is distributed in a circumferential array, such as Figure 3 As shown, the slide groove 5122 does not completely cut through the protrusion 5121, but is distributed at intervals on the protrusion 5121; the protrusion 5121 has a convex arc 5123 and a concave arc 5124, and there is a smooth transition between the convex arc 5123 and the concave arc 5124; the spherical shaft 524 is in contact with the convex arc 5123 or the concave arc 5124.

[0070] By adopting the above technical solution, the convex arc 5123 and the concave arc 5124 have two intersection points, one of which is a high point and the other is a low point. When the spherical shaft 524 is at the low point, it is in the initial state. In this state, the tension provided by the curved spring 53 to the clamping block 521 causes the arc clamping plate 522 to clamp the adjustable pipe section 11, so that the adjustable pipe section 11 is in a completely closed state. When the spherical shaft 524 is at the high point, the adjustable pipe section 11 is in a completely opened state. When the tube segment 11 is in a completely closed state, the puncture needle 2 is inserted into the blood vessel, and then the knob 6 is turned to make the spherical shaft 524 slide along the convex arc 5123 to pull the arc clamp 522 to move, thereby gradually resetting the adjustable tube segment 11 until the aperture size of the adjustable tube segment 11 allows the guide wire to pass through and is in a state of appropriate resistance. This operation process can be performed by holding the tube body 41 with the index finger and middle finger and controlling the knob 6 with the thumb, so it is convenient for single-handed operation to adjust.

[0071] See also Fig. 9 A scale 7 is provided on one side of the side plate 511 facing the tube body 41, through which the specific opening and closing state of the adjustable tube section 11 can be observed, thereby achieving quantitative adjustment.

[0072] Embodiment 2:

[0073] See also Figure 10-11On the basis of Example 1, it also includes a fastening module 8, which includes a fixed ring 81 and a movable ring 82; the fixed ring 81 is fixedly installed on the tube body 41, and the movable ring 82 is fixedly installed with a movable rod 83, and the movable rod 83 is passed through the fixed ring 81; the movable rod 83 is provided with a fastening spring 84, and the two ends of the fastening spring 84 are respectively fixedly connected to the fixed ring 81 and the movable ring 82, and the movable ring 82 is in contact with the side plate 511.

[0074] By adopting the above technical solution, the movable ring 82 is pressed against the side plate 511 under the action of the tightening spring 84, providing a more suitable friction force to offset the tension of the curved spring 53, so that after the operator adjusts it, there is no need to control the knob 6 all the time.

[0075] Embodiment 3:

[0076] See also Fig.12 , wherein a plane 5125 is also provided in the middle of the convex arc 5123 and is tangent to the adjustable pipe section 11 ; there is a smooth transition between the convex arc 5123 and the plane 5125 .

[0077] When the spherical shaft 524 slides to the plane 5125, it means that the opening of the adjustable tube section 11 has allowed the guide wire to pass through, which further provides the user with operational convenience.

[0078] Working principle: When in use, the operator first pinches the liquid storage balloon 3, then inserts the puncture needle 2 into the blood vessel at an angle of about 45° to the skin, slowly releases the liquid storage balloon 3, and blood enters the liquid storage balloon 3, causing it to bulge, so that the puncture needle 2 can be confirmed to be in the correct position, and then the thumb rotates the knob 6 to rotate the side plate 511, and the spherical shaft 524 and the convex arc 5123 of the protrusion 5121 slide relative to each other, and with the cooperation of the T-shaped groove 43 and the T-shaped limit rod 525, the block 521 moves in the extension direction of the T-shaped groove 43 as the path, driving the arc splint 522 to move, and the adjustable tube segment 11 gradually resets, so that the channel in the adjustable tube segment 11 allows the guide wire to pass through, and then the guide wire is sent into the sheath tube 1.

[0079] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0080] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0084] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0085] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cerebral angiography catheter device, comprising a sheath tube (1) and a puncture needle (2) connected to the sheath tube (1), wherein the sheath tube (1) is further provided with a liquid storage balloon (3), characterized in that: Also includes: A limit tube (4) and an adjustment module (5); The limiting tube (4) is fixed on the sheath tube (1); The adjustment module (5) comprises a clamping block adjustment disk (51), a clamping assembly (52) and a curved spring (53); The clamping block adjustment disk (51) is arranged on the periphery of the sheath tube (1), and the clamping assembly (52) is arranged in the clamping block adjustment disk (51) and penetrates into the gap between the clamping block adjustment disk (51) and the sheath tube (1); The clamping components (52) are arranged in a circular array with the axis of the sheath tube (1) as the center, the number of the curved springs (53) is the same as the number of the clamping components (52), and the two ends of each curved spring (53) are respectively connected to two adjacent clamping components (52); A concave ring (54) is provided at one end of the clamping block adjustment disk (51) facing the position limiting tube (4), and the concave ring (54) is rotatably connected to the position limiting tube (4); The clamping block adjustment disk (51) is also fixedly mounted with a knob (6).

2. A cerebral angiography catheter device according to claim 1, characterized in that: The sheath tube (1) comprises an adjustable tube section (11) and a fixed tube section (12), which are connected to each other; The puncture needle (2) is connected to the adjustable tube section (11); The limiting pipe (4) is fixedly mounted on the fixed pipe section (12).

3. A cerebral angiography catheter device according to claim 2, characterized in that: The limiting tube (4) comprises a tube body (41), and a locking plate (42) is provided at the end of the tube body (41) facing the adjustable tube section (11), and the edge of the locking plate (42) is movably locked in the concave ring (54); The end surface of the tube body (41) facing the adjustable tube section (11) is also provided with a T-shaped groove (43), the T-shaped groove (43) points to the center of the fixed tube section (12), and the number of the T-shaped grooves (43) is the same as the number of the clamping components (52): The clamping assembly (52) is also inserted into the T-shaped groove (43).

4. A cerebral angiography catheter device according to claim 2, characterized in that: The clamping block adjustment plate (51) comprises a side plate (511), a wavy path ring (512) is provided in the middle of the side plate (511), and the side plate (511) is movably mounted on the adjustable pipe section (11); The clamping assembly (52) is inserted into the wavy path ring (512).

5. A cerebral angiography catheter device according to claim 4, characterized in that: The clamping assembly (52) comprises clamping blocks (521), the number of which is the same as the number of the curved springs (53), and the two ends of each curved spring (53) are respectively fixedly connected to two adjacent clamping blocks (521); The clamping block (521) is provided with an arc-shaped clamping plate (522) on one side facing the adjustable pipe section (11), and a connecting rod (523) is provided on the other side away from the adjustable pipe section (11). The connecting rod (523) passes through the wavy path ring (512), and a spherical shaft (524) is provided at the end thereof. The clamping block (521) is also fixedly mounted with a T-shaped limiting rod (525) facing the tube body (41) and perpendicular to the end surface of the side plate (511), and the T-shaped limiting rod (525) penetrates into the T-shaped groove (43).

6. A cerebral angiography catheter device according to claim 5, characterized in that: The wavy path ring (512) includes bumps (5121), the number of which is the same as that of the spherical shaft (524) and which are distributed in a circumferential array; A sliding groove (5122) is provided in the middle of the protrusion (5121); The convex block (5121) has a convex arc (5123) and a concave arc (5124), and there is a smooth transition between the convex arc (5123) and the concave arc (5124); The spherical shaft (524) is in contact with the convex arc (5123) or the concave arc (5124).

7. A cerebral angiography catheter device according to claim 4, characterized in that: The side of the side plate (511) facing the tube body (41) is provided with a scale (7).

8. The cerebral angiography catheter device according to claim 2, characterized in that: The fixed pipe section (12) is made of hard material.

9. A cerebral angiography catheter device according to claim 4, characterized in that: It also includes a fastening module (8), wherein the fastening module (8) includes a fixed ring (81) and a movable ring (82); The fixed ring (81) is fixedly mounted on the tube body (41); the movable ring (82) is fixedly mounted with a movable rod (83); and the movable rod (83) is passed through the fixed ring (81); The movable rod (83) is provided with a fastening spring (84), and the two ends of the fastening spring (84) are respectively fixedly connected to the fixed ring (81) and the movable ring (82), and the movable ring (82) is in contact with the side plate (511).

10. The cerebral angiography catheter device according to claim 6, characterized in that: A plane (5125) is also provided in the middle of the convex arc (5123) and is tangent to the adjustable pipe section (11); There is a smooth transition between the convex arc (5123) and the plane (5125).

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