A cerebral angiography catheter device

Abstract

The application discloses a cerebral angiography catheter device and belongs to the technical field of medical equipment. The cerebral angiography catheter device comprises a sheath pipe, a puncture needle connected with the sheath pipe, a liquid storage balloon arranged on the sheath pipe, a limiting pipe and an adjusting module. The limiting pipe is fixed on the sheath pipe. 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 sheath pipe. The adjusting module is used for adjusting the opening and closing state of the sheath pipe. Before puncture, the sheath pipe can be adjusted to a completely closed state by the adjusting module. After an operator holds the sheath pipe, pinches the liquid storage balloon and punctures, the sheath pipe is adjusted to a state with a certain opening degree after blood enters the balloon, so that a guide wire passes through. In this process, the sprayed blood enters the balloon and is prevented from being sprayed through the hole in the sheath pipe. Therefore, the guide wire insertion resistance can be adjusted, and the sprayed blood can be collected.

Description

Technical Field

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

[0002] The cerebral angiography procedure involves inserting a puncture needle into the femoral artery. The puncture needle is usually connected to a cannula. The medical staff holds the cannula in one hand, maintains an angle of about 45 degrees between the puncture needle and the skin, and gently pushes it forward. After a certain amount of arterial blood is ejected, the guide wire is inserted 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] Chinese patent publication number CN115400323A discloses a cerebral angiography catheter device, pointing out that when the catheter device in the prior art is used, the guidewire speed is too fast, which may cause plaque to fall off, thereby causing cerebral thrombosis. This patent uses the reciprocating motion of the extrusion cylinder on the detachable adjustment mechanism to extrude the elastic deformation segment, thereby achieving the adjustable radial size of the elastic deformation segment.

[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 quantitative adjustment can be achieved by cooperating with a tube body with a protrusion and an extrusion cylinder with a groove, 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 inserted. Therefore, a hole for the guide wire to pass through will be left in the catheter device after adjustment. Therefore, during puncture, arterial blood will spray out of the hole and contaminate the surgical area.

[0005] Chinese patent publication number CN115400330A discloses a cerebral angiography catheter device. It points out that conventional catheter devices rely on the ejection of blood to determine whether the puncture needle has been accurately inserted into the artery, which can easily cause contamination of the surgical area. This patent utilizes a balloon to store the ejected blood, and the balloon is observed to determine whether the puncture needle has been accurately inserted.

[0006] However, although the above patent controls the opening and closing of the wire entry 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 during the entry of the guidewire 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 for enhancing understanding of the background technology of the present invention and therefore it may contain information that does not constitute the prior art that is already known to a person of ordinary skill in the art. 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 art that the current prior art cannot simultaneously achieve the adjustment of the resistance during the entry of the guidewire 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 further being provided with a liquid storage balloon, and further comprising: a limiting 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 clamping block adjustment disk is arranged on the periphery of the sheath tube, and the clamping assembly is arranged in the clamping block adjustment disk and penetrates into the gap between the clamping 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 adjustment disk has a concave ring on 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 installed on the fixed pipe section.

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

[0022] The end surface of the tube body facing the adjustable tube section is further provided with a T-shaped groove, which 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 includes 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 face 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, which is passed through the fixed ring;

[0036] The movable rod is provided with a fastening spring, and both 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 further 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 the adjustment module. Before puncture, the sheath can be adjusted to a completely closed state by the adjustment module. The operator holds the sheath and squeezes the liquid storage balloon to perform puncture. After the blood enters the balloon, the sheath is adjusted to a certain opening to allow the guide wire to pass through. During this process, the ejected blood enters the balloon and is prevented from being ejected through the hole in the sheath. Therefore, the resistance to the guide wire insertion can be adjusted, and the ejected blood can also 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 provided 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 entire process can be operated 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 diagram of the adjustment module and 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 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 Schematic diagram of the structure of the limiting tube of the present invention;

[0050] Figure 8 for Figure 6 sectional view of

[0051] Figure 9 for Figure 1 Side view of;

[0052] Figure 10 This is a schematic diagram of the planar structure of Example 2 of the present invention;

[0053] Figure 11 for Figure 9 A magnified view of the structure at point A;

[0054] Figure 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, chute; 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 limit rod;

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

[0063] The following will be combined with the accompanying 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 embodiments described are only some embodiments of the present invention, not all embodiments. It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any sizes are only illustrative and not restrictive.

[0064] Example 1:

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

[0066] By adopting the above-mentioned technical solution, 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 the 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 achieve the adjustment of the inner diameter size of the sheath tube 1. Therefore, when in use, the 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 that 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 passed through the T-shaped groove 43.

[0068] The T-shaped groove 43 serves to restrict 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 passed through 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 fixedly connected to two adjacent clamping blocks 521 respectively; the clamping block 521 is provided with an arc-shaped clamping plate 522 on the side facing the adjustable pipe section 11, away from the adjustable pipe section 1 1 is provided with a connecting rod 523, which extends to the wavy path ring 512 and is provided with a spherical shaft 524 at the end; a T-shaped limit rod 525 is fixedly installed on the block 521, facing the tube body 41 and perpendicular to the end face of the side plate 511, and the T-shaped limit rod 525 penetrates into the T-shaped groove 43. The wavy path ring 512 includes a protrusion 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 protrusion 5121, and the slide groove 5122 is distributed in a circumferential array, as shown in FIG. 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 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 fully 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-shaped splint 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 that it is convenient for single-handed operation to adjust.

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

[0072] Example 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, which 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 fixedly connected to the fixed ring 81 and the movable ring 82 respectively, and the movable ring 82 is in contact with the side plate 511.

[0074] By adopting the above technical solution, the movable ring 82 contacts the side plate 511 under the action of the fastening spring 84, providing a more appropriate friction force to offset the tension of the curved spring 53. Therefore, after the operator adjusts, there is no need to constantly control the knob 6.

[0075] Example 3:

[0076] See also Figure 12 , wherein a plane 5125 is further 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, to confirm that the puncture needle 2 is in the correct position, and then rotates the knob 6 with the thumb 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. With the cooperation of the T-shaped groove 43 and the T-shaped limit rod 525, the clamping block 521 moves in the extension direction of the T-shaped groove 43, 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 can be sent into the sheath tube 1.

[0079] All standard parts used in the present invention can be purchased commercially, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connections adopt conventional connection methods in the prior art and will not be described in detail here. Any matters not described in detail in this specification belong to the prior art known to professionals 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 to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. "Multiple" means two or more, unless otherwise specifically defined.

[0081] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0082] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0083] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[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. 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 scope of protection 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 adjusting disk (51) is arranged on the periphery of the sheath tube (1), and the clamping assembly (52) is arranged in the clamping block adjusting disk (51) and penetrates into the gap between the clamping block adjusting disk (51) and the sheath tube (1); The clamping components (52) are distributed 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 on 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); 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); 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 disposed on the wavy path ring (512); The clamping assembly (52) includes 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 facing away from the adjustable pipe section (11). The connecting rod (523) passes through the wavy path ring (512) and has a spherical shaft (524) at its end. The limiting tube (4) comprises a tube body (41), and a clamping plate (42) is provided at the end of the tube body (41) facing the adjustable tube section (11), and the edge of the clamping plate (42) is movably clamped in the concave ring (54); The end surface of the tube body (41) facing the adjustable tube section (11) is further provided with a T-shaped groove (43), the T-shaped groove (43) pointing 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); A T-shaped limiting rod (525) is also fixedly mounted on the clamping block (521), facing the tube body (41) and perpendicular to the end surface of the side plate (511). The T-shaped limiting rod (525) penetrates into the T-shaped groove (43).

2. The cerebral angiography catheter device according to claim 1, characterized in that: The wavy path ring (512) includes protrusions (5121), the number of which is the same as that of the spherical shafts (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) contacts the convex arc (5123) or the concave arc (5124).

3. The cerebral angiography catheter device according to claim 1, characterized in that: A scale (7) is provided on the side of the side plate (511) facing the tube body (41).

4. The cerebral angiography catheter device according to claim 1, characterized in that: The fixed pipe section (12) is made of hard material.

5. The cerebral angiography catheter device according to claim 1, 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 fixedly connected to the fixed ring (81) and the movable ring (82) respectively, and the movable ring (82) is in contact with the side plate (511).

6. The cerebral angiography catheter device according to claim 2, 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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