Multifunctional fishhook catheter for neuroangiography

Abstract

The utility model discloses a multifunctional fishhook catheter for neuroangiography, which relates to the technical field of medical instruments and comprises an angiography catheter, the angiography catheter is integrally formed into a catheter main body and a fishhook end, and the catheter main body and the fishhook end are sequentially composed of an outer rubber layer, a steel frame and an inner rubber layer from outside to inside. The steel frame is composed of a plurality of elastic steel bars, a plastic steel ring and a central steel ring. According to the multifunctional fishhook catheter for neuroangiography, by means of the fishhook end formed at the end of the angiography catheter, the multifunctional fishhook catheter can adapt to the bent structure of the end of the neuroangiography and is convenient to use, meanwhile, by additionally arranging the steel frame, especially by means of the thickening and reinforcing design of the center steel ring, bent forming of the fishhook end can be reinforced, and the service life of the fishhook catheter is prolonged. In addition, the angiographic catheter can be supported through the cooperation of the elastic steel bar and the plastic steel ring, and the situation that the angiographic catheter sinks and deforms in the process of penetrating into the blood vessel, and consequently a subsequent guiding catheter and a contrast agent are difficult to introduce is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely is a multifunctional fishhook catheter for neurovascular angiography. BACKGROUND

[0002] Contrast examination refers to the density and the body inconsistent material, namely contrast agent, is introduced to the part needing examination through blood vessel, digestive tract, respiratory tract etc., the density difference of the part being examined is artificially caused, then the relevant contrast examination equipment is used, the morphology and function of the tissue organ are observed through the density difference, and finally corresponding diagnosis and treatment are carried out;

[0003] In neurovascular angiography and interventional therapy, the contrast catheter is the key equipment of percutaneous angiography, the contrast catheter is a long rubber tube, its main function is to provide tube guide so that contrast agent can be smoothly introduced into blood vessel, and the contrast effect is produced, and the qualified contrast catheter should have the characteristics of suitable hardness, elasticity and torsion, good X-ray transmission performance, contrast performance and the like.

[0004] However, the existing contrast catheter is mostly simple straight line structure, and since the end of neurovascular is mostly curved structure, the catheter end is difficult to penetrate into the curved blood vessel end and bend elastically along the blood vessel wall, the user needs to change the angle for trying, and it is more troublesome to use, and the existing contrast catheter does not have a supporting structure, so that the catheter is prone to deformation during penetration into the blood vessel, and the subsequent guide catheter and contrast agent are difficult to smoothly pass in.

[0005] In view of the above problems, it is necessary to make innovative design on the basis of the original equipment, therefore we propose a multifunctional fishhook catheter for neurovascular angiography, which can well solve the above problems. SUMMARY

[0006] The utility model discloses a multifunctional fishhook catheter for neurovascular angiography, to solve the problem that the existing contrast catheter is mostly simple straight line structure, and since the end of neurovascular is mostly curved structure, the catheter end is difficult to penetrate into the curved blood vessel end and bend elastically along the blood vessel wall, the user needs to change the angle for trying, and it is more troublesome to use, and the existing contrast catheter does not have a supporting structure, so that the catheter is prone to deformation during penetration into the blood vessel, and the subsequent guide catheter and contrast agent are difficult to smoothly pass in.

[0007] To achieve the above object, the utility model provides the following technical scheme: a multifunctional fishhook catheter for neurovascular angiography, including contrast catheter, the contrast catheter is shaped as the straight line type catheter main part and the fishhook end head of end portion in the conventional state;

[0008] The conduit body and the fishhook end are sequentially composed of an outer rubber layer, a steel frame and an inner rubber layer from outside to inside, wherein the steel frame is flexible and is composed of a plurality of elastic steel strips, a plastic steel ring and a center steel ring, the elastic steel strips are equidistantly distributed between the outer rubber layer and the steel frame, the plastic steel ring is connected between each elastic steel strip and is uniformly arranged along the conduit body and the fishhook end, and the plastic steel ring at the center of the fishhook end is shaped as the center steel ring, which is wider and stronger than the other plastic steel rings.

[0009] The fishhook end shaped at the end of the contrast conduit can adapt to the curved structure of the end of the neurovascular vessel, facilitate the deep penetration into the end of the vessel and the slight elastic bending along the vessel wall to better fit the shape of the vessel, facilitate the use, and through the addition of the steel frame between the outer rubber layer and the inner rubber layer, especially the thickening and strengthening design of the center steel ring, the bending and shaping of the fishhook end can be reinforced, and through the cooperation of the elastic steel strips and the plastic steel ring, the contrast conduit can be supported to avoid the deformation of the contrast conduit during the deep penetration into the vessel, which leads to the difficulty of the subsequent guide conduit and contrast agent.

[0010] Preferably, the inner wall of the inner rubber layer is provided with a smooth coating for increasing the smoothness of the inner wall of the inner rubber layer, so that the subsequent guide conduit and contrast agent can be more smoothly inserted along the contrast conduit.

[0011] Preferably, the elastic steel strips at the outer diameter of the fishhook end have stronger elasticity and torsion than the elastic steel strips at the inner diameter to adapt to the curved structure of the fishhook end.

[0012] Preferably, the end of the fishhook end is fixedly connected with a fixed end ring, the outer wall of the fixed end ring is in a structure of inwardly shrinking, the fixed end ring can connect and consolidate the outer rubber layer, the steel frame and the inner rubber layer of each layer of the fishhook end, and the shrinking structure of the fixed end ring can make the fishhook end more smoothly penetrate into the vessel.

[0013] Preferably, the outer wall of the fixed end ring is shaped with a plurality of uniformly distributed one-way limiting blocks, the one-way limiting blocks are tilted towards the fishhook end, this structure can limit the fixed end ring in one direction in the vessel without affecting the penetration of the fixed end ring into the vessel, so as to prevent the contrast conduit from being pulled back and deviated due to the misuse of the user after being inserted into the correct position.

[0014] Preferably, the end of the conduit body is sequentially fixedly connected with a connecting seat and a connecting sleeve, the connecting seat can connect and consolidate the outer rubber layer, the steel frame and the inner rubber layer of each layer of the end of the conduit body, and the connecting sleeve is used for sleeving with an external instrument such as a syringe containing contrast agent.

[0015] Preferably, the inner wall of the end portion of the connecting sleeve away from the hook end is formed with several circles of fastening convex rings to improve the stability of the sleeve connection with the external instrument.

[0016] Compared with the prior art, the nerve and blood vessel angiography multifunctional fishhook catheter has the following beneficial effects: the fishhook end formed at the end of the angiography catheter can adapt to the curved structure of the end of the nerve and blood vessel, facilitating the use, and the thickened and reinforced design of the center steel ring of the added steel frame can reinforce the bending and forming of the fishhook end, and the cooperation of the elastic steel strip and the shaped steel ring can support the angiography catheter, avoiding the deformation of the angiography catheter during the deepening into the blood vessel, and the subsequent guide catheter and contrast agent are difficult to pass in.

[0017] 1. The fishhook end formed at the end of the angiography catheter can adapt to the curved structure of the end of the nerve and blood vessel, facilitating the deepening into the end of the blood vessel, and the slight elastic bending along the blood vessel wall can better fit the shape of the blood vessel, facilitating the use.

[0018] 2. The thickened and reinforced design of the center steel ring of the added steel frame between the outer rubber layer and the inner rubber layer can reinforce the bending and forming of the fishhook end, and the cooperation of the elastic steel strip and the shaped steel ring can support the angiography catheter, avoiding the deformation of the angiography catheter during the deepening into the blood vessel, and the subsequent guide catheter and contrast agent are difficult to pass in.

[0019] 3. The setting of the fixed end ring can connect and consolidate the outer rubber layer, the steel frame and the inner rubber layer of each layer of the end of the fishhook end, and the contraction structure of the fixed end ring can make the end of the fishhook end more smoothly penetrate into the blood vessel, and the one-way limiting block formed on the outer wall of the fixed end ring can one-way limit the fixed end ring in the blood vessel without affecting the penetration of the fixed end ring into the blood vessel, preventing the offset caused by the pulling back of the angiography catheter after entering the correct position due to the user's mistake.

[0020] 4. The connection seat can connect and consolidate the outer rubber layer, the steel frame and the inner rubber layer of each layer of the end of the catheter main body, the connecting sleeve is used for sleeving with the external instrument such as a syringe containing contrast agent, and the several circles of fastening convex rings formed on the inner wall of the connecting sleeve can improve the stability of the sleeve connection with the external instrument. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the utility model;

[0022] Figure 2 It is a whole cross section structure schematic view of the utility model;

[0023] Figure 3The internal cutting structure schematic view of the outer rubber layer of the utility model;

[0024] Figure 4 The connecting structure schematic view of the steel frame and the fixed end ring and the connecting seat of the utility model;

[0025] Figure 5 The utility model discloses Figure 1 The enlarged structure schematic view of A place in the middle;

[0026] Figure 6 The cutting structure schematic view of the connecting seat and the connecting pipe sleeve of the utility model.

[0027] In the drawing: 1, contrast guide tube, 2, guide tube main body, 3, fishhook end head, 4, outer rubber layer, 5, steel frame, 501, elastic steel strip, 502, shaping steel ring, 503, center steel ring, 6, inner rubber layer, 7, soft and smooth coating, 8, fixed end ring, 9, one-way limiting block, 10, connecting seat, 11, connecting sleeve, 12, fastening convex ring. Specific implementation

[0028] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] Embodiment one: please refer to Figures 1-6 The utility model provides the following technical scheme: a multifunctional fishhook guide tube for neurovascular angiography, including contrast guide tube 1, contrast guide tube 1 is integrally formed as the guide tube main body 2 and the fishhook end head 3 of end portion in the conventional state and presents linear type;

[0030] The guide tube main body 2 and the fishhook end head 3 are sequentially composed of the outer rubber layer 4, the steel frame 5 and the inner rubber layer 6 from outside to inside, wherein the steel frame 5 can be flexibly bent as a whole, and it is composed of a plurality of elastic steel strips 501, shaping steel rings 502 and a center steel ring 503, a plurality of elastic steel strips 501 are circumferentially equidistantly distributed between the outer rubber layer 4 and the steel frame 5, the elastic steel strip 501 at the outer diameter of the fishhook end head 3 has stronger elasticity and torsion than the elastic steel strip 501 at the inner diameter to adapt to the bending structure of the fishhook end head 3, the shaping steel ring 502 is connected between each elastic steel strip 501 and is evenly arranged along the guide tube main body 2 and the fishhook end head 3, wherein the shaping steel ring 502 at the center of the fishhook end head 3 is shaped into the center steel ring 503, the center steel ring 503 is wider and has higher strength relative to other shaping steel rings 502;

[0031] The fishhook end 3 shaped at the end of the contrast medium catheter 1 can adapt to the curved structure of the nerve blood vessel end, facilitate the deepening into the blood vessel end, and make small elastic bending along the blood vessel wall to more conform to the shape of the blood vessel, facilitate use, and through the addition of the steel frame 5 between the outer rubber layer 4 and the inner rubber layer 6, especially the thickening and strengthening design of the center steel ring 503, the bending and shaping of the fishhook end 3 can be reinforced, and the elastic steel strip 501 and the shaped steel ring 502 are used to support the contrast medium catheter 1, so that the contrast medium catheter 1 does not deform inwardly during the deepening into the blood vessel, and the subsequent guide catheter and contrast medium can be difficult to pass in.

[0032] In addition, the inner wall of the inner rubber layer 6 is provided with a smooth coating 7 for increasing the smoothness of the inner wall of the inner rubber layer 6, so that the subsequent guide catheter and contrast medium can be more smoothly passed along the contrast medium catheter 1.

[0033] In the embodiment one, the end of the fishhook end 3 is fixedly connected with a fixed end ring 8, the outer wall of the fixed end ring 8 is in a structure of inwardly shrinking, the fixed end ring 8 can connect and consolidate the outer rubber layer 4, the steel frame 5 and the inner rubber layer 6 at the end of the fishhook end 3, and the shrinking structure of the fixed end ring 8 can make the end of the fishhook end 3 more smoothly penetrate into the blood vessel, and the outer wall of the fixed end ring 8 is shaped with a plurality of uniformly distributed one-way limiting blocks 9, the one-way limiting blocks 9 are tilted towards the fishhook end 3, and the structure can one-way limit the fixed end ring 8 in the blood vessel without affecting the penetration of the fixed end ring 8 into the blood vessel, so as to prevent the contrast medium catheter 1 from being pulled back and deviated due to the misoperation of the user after being passed into the correct position.

[0034] The end of the catheter main body 2 is fixedly connected with a connecting seat 10 and a connecting sleeve 11 in sequence, the connecting seat 10 can connect and consolidate the outer rubber layer 4, the steel frame 5 and the inner rubber layer 6 at the end of the catheter main body 2, the connecting sleeve 11 is used for sleeving with an external instrument such as a syringe filled with contrast medium, and the end of the connecting sleeve 11 away from the fishhook end 3 is shaped with a plurality of fastening convex rings 12 in the inner wall, so as to improve the stability of the sleeve connection with the external instrument.

[0035] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connection", "connect" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0036] Although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multifunctional fishhook catheter for neurovascular angiography, comprising an angiography catheter (1) which is integrally formed as a catheter body (2) in a straight line in a normal state and a fishhook end head (3) at an end thereof. characterized in that The catheter body (2) and the fishhook end head (3) are sequentially formed from the outside to the inside by an outer rubber layer (4), a steel frame (5) and an inner rubber layer (6), wherein the steel frame (5) is flexible and is formed by a plurality of elastic steel bars (501), a plurality of shaped steel rings (502) and a central steel ring (503), the elastic steel bars (501) are equidistantly distributed between the outer rubber layer (4) and the steel frame (5) in a circle, the shaped steel rings (502) are connected between each of the elastic steel bars (501) and are uniformly arranged along the catheter body (2) and the fishhook end head (3), the shaped steel ring (502) at the center of the fishhook end head (3) is formed as the central steel ring (503), the central steel ring (503) is wider and stronger than the other shaped steel rings (502).

2. The multi-purpose fish hook catheter for neuro-angiography according to claim 1, characterized in that: The inner wall of the inner rubber layer (6) is provided with a smooth coating (7) for increasing the smoothness of the inner wall of the inner rubber layer (6).

3. The multi-purpose fish hook catheter for neuro-angiography according to claim 2, characterized in that: The elastic steel bars (501) at the outer diameter of the fishhook end head (3) have stronger elasticity and torsion than the elastic steel bars (501) at the inner diameter.

4. The multi-purpose fish hook catheter for neuro-angiography according to claim 1, wherein: The end of the fishhook end head (3) is fixedly connected with a fixed end ring (8), and the outer wall of the fixed end ring (8) is inwardly contracted.

5. The multi-purpose fish hook catheter for neuro-angiography according to claim 4, characterized in that: The outer wall of the fixed end ring (8) is formed with a plurality of uniformly distributed one-way limiting blocks (9) which are tilted towards the fishhook end head (3).

6. The multi-purpose fish hook catheter for neuro-angiography according to claim 1, wherein: The end of the catheter body (2) is sequentially fixedly connected with a connecting seat (10) and a connecting sleeve (11).

7. The multi-purpose fish hook catheter for neuro-angiography according to claim 6, characterized in that: The end of the connecting sleeve (11) away from the fishhook end head (3) is formed with a plurality of fastening convex rings (12) on the inner wall thereof.

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