CN217548750U - Guide tube for nerve insertion microcatheter - Google Patents

Abstract

A guide tube for a nerve interventional microcatheter, which includes a guide tube body 1, and a guide cone with a diameter gradually increasing from bottom to top and a bell-shaped guide cone is integrally formed at the upper end of the guide tube body. The connecting part between the lower end of the guiding cone and the upper end of the main body of the guiding tube is set as a smooth transition surface with a rounded corner structure. A notch extending axially from both ends of the whole body and radially penetrating the side wall is provided on a side wall of the whole body formed by the guide tube main body and the guide cone, and the width of the notch does not exceed the guide tube The thickness of the side wall of the main body and the guide cone. When the microcatheter is introduced into the neurointerventional surgery, the microcatheter can stably and smoothly pass through the Y-shaped hemostatic valve from the main body of the guiding tube. After the microcatheter successfully reaches the target point, the elasticity of the material of the main body of the guiding tube is used. and the incision on the side wall, the main body of the guiding tube can be easily peeled off from the microcatheter along the incision.

Description

Guide tube for neurointerventional microcatheter

technical field

The utility model relates to the technical field of medical instruments used in nerve intervention operations, in particular to a guide tube of a nerve intervention micro-catheter.

Background technique

Interventional therapy is not like an exposed, open surgery that is completely opened, and it is not a surgery that is treated by drugs. It is somewhere in between, so American doctors named it intervention (meaning interventional intervention). , Neurointerventional therapy is the use of special materials (catheters, guide wires, emboli, stents, etc.) under the guidance of imaging equipment such as X-ray machines (dsa machines) with fluoroscopy and digital subtraction functions. Vascular and nonvascular diseases of the central nervous system. During treatment, femoral artery or radial artery puncture is generally used, and seldinger percutaneous vascular puncture and catheter technology are used. The microcatheter is selectively inserted into the target vessel to reach the responsible intracranial lesion for treatment. Neurointerventional therapy has the advantages of light injury, less pain, good curative effect, quick postoperative recovery and wide range of indications. During the operation, the microcatheter is sent into the patient's blood vessel through a percutaneous puncture sheath, and a Y-shaped hemostatic valve is installed at the rear end of the sheath. In the surgical treatment of intracranial aneurysm embolization, the shaping of the front end of the microcatheter is the key technology for the treatment of intracranial aneurysm embolization. Appropriate and accurate microcatheter shape can make the operation smoother. The microcatheter needs to pass through the Y-shaped hemostatic valve to enter the punctured blood vessel such as the femoral artery or radial artery, and finally reach the intracranial target artery. Because the tip of the microcatheter is thin and soft, it may not be able to pass through the Y-shaped hemostatic valve without protection, or it is easy to deform the tip of the microcatheter when passing through the Y-shaped hemostasis valve, even during the passing process due to The microcatheter is damaged due to friction, which increases the risk of the operation to a certain extent and affects the operation process of the operation.

Aiming at the problem that the above-mentioned microcatheter is difficult to pass through the Y-shaped hemostatic valve stably and smoothly by itself, the invention aims to design a guiding tube for the nerve intervention microcatheter.

Utility model content

The purpose of the utility model is to provide a guide tube for a nerve interventional microcatheter. The technical problem to be solved is that the microcatheter is difficult to pass through the Y-shaped hemostatic valve stably and smoothly by itself in the process of nerve interventional therapy.

In order to solve the above-mentioned technical problems, the present invention provides a guide tube of a nerve intervention microcatheter, which includes a guide tube main body, and an integrally formed connection at the upper end of the guide tube main body is provided with a diameter that gradually increases from bottom to top. The guide cone is in the shape of a bell mouth, and the connecting part between the lower end of the guide cone and the upper end of the main body of the guide pipe is set as a smooth transition surface with a rounded corner structure.

Preferably, a notch extending axially from both ends of the whole body and penetrating the side wall radially is provided on a side wall of the whole formed by the main body of the guide tube and the guide cone, and the width of the notch does not exceed the width of the The thickness of the guide tube body and the side wall of the guide cone.

Preferably, a lug extending radially outward is provided in an integrally formed connection between the upper end of the guide cone and the other side edge corresponding to the cutout.

Preferably, the axial length of the guide tube body is 60-70 mm, the inner diameter of the guide tube body is 1.2-1.4 mm, and the thickness of the side wall of the guide tube body is 8-15 filaments.

Preferably, the axial length of the main body of the guiding tube is 64 mm, the inner diameter of the main body of the guiding tube is 1.27 mm, and the thickness of the side wall of the main body of the guiding tube is 12 wires.

Preferably, the main body of the guide tube and the guide cone are made of stainless steel or PP.

Preferably, a rounded corner structure is provided at the corners of the upper end of the guide cone located on both sides of the cutout.

Compared with the prior art, the beneficial effects of the present utility model are:

1. When the microcatheter is introduced into the neurointerventional operation, the main body of the guiding tube can be placed in the Y-shaped hemostatic valve to form an "exclusive channel", and the microcatheter can pass through the main body of the guiding tube stably and smoothly through the Y-shaped hemostatic valve. hemostatic valve;

2. After the microcatheter successfully reaches the target point, the main body of the guiding tube can be removed from the microcatheter along the incision by using the material elasticity of the main body of the guiding tube and the incision on the side wall. peels off easily.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of the present invention.

FIG. 2 is a partial enlarged structural schematic diagram of A in FIG. 1 .

3 is a schematic diagram of a radial projection structure of the present invention.

In the accompanying drawings: 1. the main body of the guide tube; 2. the guide cone; 3. the incision; 4. the ear handle.

Detailed ways

The following will describe in more detail a guide tube of a nerve intervention microcatheter proposed by the present invention with reference to Figures 1-3 and preferred embodiments.

As shown in Figures 1 and 2, the present invention provides a guide tube for a nerve interventional microcatheter, which includes a guide tube main body 1, and an integrally formed connection at the upper end of the guide tube main body 1 is provided with a diameter extending from the bottom to the bottom. The guide cone 2 with a bell mouth shape is gradually increased upwards, and the connecting part between the lower end of the guide cone 2 and the upper end of the guide tube main body 1 is set as a smooth transition surface with a rounded corner structure; A notch 3 extending axially from both ends of the whole body and penetrating the side wall radially is provided on a side wall of the whole formed by the guide tube main body 1 and the guide cone 2. The notch 3 will close the ring structure. The guide tube body 1 and the guide cone 2 are cut into an open annular structure, and the width of the cut 3 does not exceed the thickness of the side walls of the guide tube body 1 and the guide cone 2 .

During the specific implementation of the present utility model, the Seldinger puncture technique is used to establish a surgical channel through the radial artery or the femoral artery, an angiography catheter is inserted to the angiography position through an arterial sheath, a contrast agent is injected for angiography, and an appropriate operating angle is selected after 3D imaging. , put the guiding tube main body 1 of the present invention into the Y-shaped hemostatic valve, and then pass the micro-catheter from the guiding cone 2 into the guiding tube main body 1, and pass through the guiding tube The main body 1, then the guide tube body can be peeled off from the microcatheter using the incision 3 and withdrawn from the Y-shaped hemostatic valve, and the microcatheter is further advanced deep into the arterial vessel to reach In the aneurysm cavity, the deformed shape of the front end of the microcatheter can be effectively prevented from being deformed in the process, and the success rate of the operation is improved.

Further, as shown in FIG. 3 , an integrally formed connection between the upper end of the guide cone 2 and the other side edge corresponding to the cutout 3 is provided with an ear handle 4 extending radially outward, and the ear handle 4 can be used for Medical staff operation.

The axial length of the guide tube main body 1 is 64mm, the inner diameter of the guide tube main body 1 is 1.27mm, the thickness of the side wall of the guide tube main body 1 is 12 wires, and the guide tube main body 1 has a thickness of 12 wires. 1 and the guide cone 2 are made of stainless steel or PP, and the hardness is just suitable for not easily deformed when squeezed, which ensures the integrity of the channel, and has a certain elasticity, which can be easily peeled from the microcatheter.

In addition, a rounded corner structure is provided at the upper end of the guide cone 2 at the corners on both sides of the cutout 3 , and this structure can make one end of the cutout 3 have a peeling guide structure.

It should be noted again that, in view of the needs of surgical hygiene, the present invention can be used as a disposable surgical instrument, and can also be reused after being sterilized under medical conditions, but similar structures that can be reused after being inspired by the present invention should also be used. into the scope of protection of the present invention.

In summary, the technical solution of the present utility model can fully and effectively accomplish the above-mentioned purpose of the utility model, and the structural principle and functional principle of the present utility model have been fully verified in the embodiment, and the expected effect and purpose can be achieved. , and the embodiments of the present utility model can also be transformed according to these principles, therefore, the present utility model includes all the replacement contents within the scope mentioned in the scope of the patent application. Any equivalent changes made within the scope of the patent application of the present utility model shall fall within the scope of the patent application of this case.

Claims (7)

1. A guide tube of a nerve intervention micro-catheter, which comprises a guide tube main body, and is characterized in that: the upper end of the guide tube main body is integrally connected with a guide cone hopper, the diameter of the guide cone hopper is gradually increased from bottom to top and is in a horn mouth shape, and the part connected between the lower end of the guide cone hopper and the upper end of the guide tube main body is a smooth transition curved surface with a fillet structure.

2. The guide tube for a nerve insertion microcatheter of claim 1, wherein: a notch which axially extends out of two ends of the whole body and radially penetrates through the side wall is arranged on one side wall of the whole body formed by the guide tube main body and the guide cone bucket, and the width of the notch does not exceed the thickness of the side walls of the guide tube main body and the guide cone bucket.

3. The guide tube for a neuro-interventional micro-catheter as set forth in claim 2, wherein: and the upper end of the guide cone bucket is connected with the edge of the other side corresponding to the notch in an integrated manner, and a lug extending and expanding to the radial outer side is arranged.

4. The guide tube of a neuro-interventional micro-catheter as set forth in claim 3, wherein: the axial length of the guide tube main body is 60-70mm, the inner diameter of the guide tube main body is 1.2-1.4mm, and the thickness of the side wall of the guide tube main body is 8-15 threads.

5. The guide tube for a nerve insertion microcatheter of claim 4, wherein: the axial length of the guide tube main body is 64mm, the inner diameter of the guide tube main body is 1.27mm, and the thickness of the side wall of the guide tube main body is 12 threads.

6. The guide tube for a nerve insertion microcatheter of claim 5, wherein: the guide tube main body and the guide cone hopper are made of stainless steel or PP materials.

7. The guide tube for a nerve insertion microcatheter of claim 6, wherein: and a fillet structure is arranged at the corner parts of the upper end of the guide cone bucket on two sides of the notch.

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