Cerebral arteriovenous malformation interventional embolism postoperation reserved catheter cutting device
By setting up an extrusion groove and a cutoff groove inside the bracket and using the extrusion slope connection, the linear insertion and stable cutoff of the microcatheter are achieved, which solves the problem of difficulty in inserting the microcatheter and secondary injury during resection, and improves the convenience and safety of the operation.
Patent Information
- Application Number
- CN202510516351.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-07-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing interventional embolization of cerebral arteriovenous malformation, microcatheter insertion is difficult and can easily cause secondary damage to the patient during resection, especially the inclined structure, which leads to large insertion resistance and is easy to pull the duct during resection.
A tube truncation device after interventional embolization of cerebral arteriovenous malformation is designed. By setting up an extrusion groove and a cutoff groove inside the stent and connecting with the extrusion slope, the linear insertion of the microcatheter is achieved, and the stability and accuracy of the microcatheter during cutoff is ensured through the cooperation of the extrusion block and the clamping groove.
It reduces the difficulty of microcatheter insertion, improves surgical convenience, reduces the risk of secondary injury to patients, and ensures the stability and accuracy of truncation.
Smart Images
Figure CN120242299A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a device for truncating a catheter left after interventional embolization of cerebral arteriovenous malformation. Background Art
[0002] Cerebral arteriovenous malformation (AVM) is a congenital variation in the local cerebral vasculature, manifested as the lack of capillaries between cerebral arteries and cerebral veins at the lesion site, resulting in a direct connection between arteries and veins, forming a short circuit between arteries and veins, and leading to a series of disorders of cerebral hemodynamics; clinically, cerebral arteriovenous malformation often presents as repeated intracranial hemorrhage, partial or generalized seizures, transient ischemic attack, and progressive neurological dysfunction, and is one of the important causes of spontaneous subarachnoid hemorrhage in the cranial cavity; At present, the treatment methods for cerebral arteriovenous malformation mainly include craniotomy surgical resection, minimally invasive endovascular interventional embolization therapy, and stereotactic radiotherapy; among them, endovascular interventional embolization therapy has gradually become an important method for treating cerebral arteriovenous malformation due to its minimally invasive, safe, and effective characteristics; however, during the interventional embolization treatment process, especially when using a microcatheter for glue embolization, there is a risk of glue reflux sticking to the tip of the microcatheter; by using a catheter truncation device, the catheter can be partially left and truncated in the embolized blood vessel, and even if the catheter is stuck, it can be easily pulled out, providing more sufficient glue injection time for embolization and maximizing the avoidance of bleeding risk; In the prior art, due to the small size of the device, the cutting tool needs to be vertically arranged. The existing device needs to set an inclined surface for cutting during resection, but the inclined surface will cause greater resistance during the insertion of the microcatheter, resulting in difficult insertion of the microcatheter, and the pipeline will be pulled a little during resection, which will cause secondary harm to the patient; Therefore, in view of the above problems in the prior art, the present solution proposes a device for truncating a catheter left after interventional embolization of cerebral arteriovenous malformation. Summary of the Invention
[0003] In order to solve the above problems in the prior art, the present invention designs a device for truncating a catheter left after interventional embolization of cerebral arteriovenous malformation. By setting a squeezing groove at the upper end inside the stent, a truncating groove at the lower end, and connecting them through a squeezing inclined surface in the middle, after truncation, the microcatheter is squeezed to one side by a squeezing block, so that the microcatheter fits the squeezing inclined surface, and the microcatheter is truncated by a blade inside the squeezing block; at the same time, through a clamping groove provided at the bottom of the stent, the microcatheter is clamped during truncation to prevent secondary harm to the patient caused by pulling the microcatheter during squeezing and truncation; To achieve the above technical effects, the present invention is realized through the following technical solutions: a device for truncating a catheter left after interventional embolization of cerebral arteriovenous malformation, comprising: a stent, a squeezing block; The squeezing block is slidably connected inside the stent; The upper end of the stent is provided with an extrusion groove, the lower end is provided with a truncation groove for slidably connecting a microcatheter, and an extrusion inclined surface is provided at the connection; an extrusion block is provided on one side of the extrusion groove, and inclined grooves are provided on both sides of the upper end; a cutting chute is provided in the middle of the extrusion block for slidably connecting a cutting slide plate, a slider is provided at the upper end of one side, and a compression spring is provided at the lower end and fixedly connected to one side of the extrusion groove; the slider slidably connects the stent and penetrates the stent to provide the extrusion block; Further, the truncation groove is a circular groove; Further, the extrusion groove is a long groove, the length of which is greater than the inner diameter of the truncation groove, the middle of the lower end communicates with the truncation groove, and an extrusion inclined surface is provided on the left side to smoothly communicate with the truncation groove; Further, a cutting step is provided at the lower end of the cutting chute; Further, a slide rod is provided at the lower end of the cutting slide plate and fixedly connected to a blade, and an inclined block is provided at the top for slidably connecting the inclined groove; an excision spring is sleeved outside the slide rod; the excision spring is fixedly connected to the excision step; Further, a clamping groove is provided at the lower end of the truncation groove; clamping blocks are symmetrically provided on both sides of the clamping groove; a clamping rack is provided on one side of the clamping block and meshes with a clamping gear; a clamping rod is provided at the upper end of the clamping gear; the upper end of the clamping rod penetrates the stent to provide a clamping knob; Further, scales are provided on the outside of the stent, which can directly show the insertion depth of the stent and judge the truncation length of the microcatheter.
[0004] The beneficial effects of the present invention are: By providing an extrusion groove at the upper end inside the stent, a truncation groove at the lower end, and connecting them through an extrusion inclined surface, the microcatheter can be inserted linearly, avoiding the insertion resistance caused by the inclined surface. And when truncation is required, the microcatheter is squeezed to one side by the extrusion block, so that the microcatheter fits the extrusion inclined surface, and the microcatheter is truncated by the blade inside the extrusion block. Thus, it not only ensures the truncation of the microcatheter, but also reduces the difficulty of inserting the microcatheter and improves the convenience of the operation; At the same time, the clamping groove and clamping blocks provided at the bottom of the stent can clamp the microcatheter during the truncation process, prevent the catheter from shifting during extrusion and truncation, ensure the stability and accuracy of truncation, reduce the pulling of the microcatheter during the truncation process, and thus reduce the risk of secondary injury to the patient. BRIEF DESCRIPTION OF THE DRAWINGS
[0005] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below.
[0006] Figure 1 It is an overall structural schematic diagram of a device for truncating a catheter left after interventional embolization of cerebral arteriovenous malformation; Figure 2It is a schematic diagram of a microcatheter being squeezed by a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation; Figure 3 It is a schematic diagram of the vertical structure of a microcatheter of a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation; Figure 4 It is a schematic diagram of the partial structure A of a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation; Figure 5 It is a schematic diagram of the structure of a pressing block of a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation; Figure 6 It is a schematic diagram of the structure of a cutting slide plate of a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation; Figure 7 It is a schematic diagram of the structure of a clamping block of a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation; In the attached drawings, the list of components represented by each reference numeral is as follows: 1 - stent, 2 - microcatheter, 3 - inclined groove, 4 - compression spring, 5 - cutting step, 6 - pressing block, 7 - cutting chute, 8 - slider, 9 - pressing block, 10 - inclined block, 11 - cutting slide plate, 12 - cutting spring, 13 - sliding rod, 14 - blade, 15 - clamping knob, 16 - clamping rod, 17 - clamping gear, 18 - clamping block, 19 - clamping rack, 20 - clamping groove, 21 - pressing inclined surface, 22 - compression groove, 23 - truncating groove. Detailed implementation manners
[0007] The present invention discloses a device for truncating a catheter left after interventional embolization of a cerebral arteriovenous malformation, including: a stent 1 and a pressing block 6; the pressing block 6 is slidably connected inside the stent 1; a compression groove 22 is provided at the upper end of the stent 1, and a truncating groove 23 is provided at the lower end, which is slidably connected to the microcatheter 2, and a pressing inclined surface 21 is provided at the connection; a pressing block 6 is provided on one side of the compression groove 22, and inclined grooves 3 are provided on both sides of the upper end; a cutting chute 7 is provided in the middle of the pressing block 6, which is slidably connected to the cutting slide plate 11, a slider 8 is provided at the upper end of one side, and a compression spring 4 is provided at the lower end, which is fixedly connected to one side of the compression groove 22; the slider 8 is slidably connected to the stent 1 and penetrates the stent 1 to provide the pressing block 6; through the connection of the pressing inclined surface 21, the microcatheter 2 can be inserted linearly, avoiding the insertion resistance caused by the inclined surface.
[0008] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Embodiment 1
[0009] As Figure 1-7 shown, the pressing block 6 is slidably connected inside the stent 1; The upper end of the stent 1 is provided with an extrusion groove 22, the lower end is provided with a truncation groove 23 which is slidably connected to the microcatheter 2, and an extrusion inclined surface 21 is arranged at the connection; an extrusion block 6 is arranged on one side of the extrusion groove 22, and inclined grooves 3 are arranged on both sides of the upper end; a cutting chute 7 is arranged in the middle of the extrusion block 6 and is slidably connected to a cutting slide plate 11, a slider 8 is arranged at the upper end of one side, and a compression spring 4 is arranged at the lower end and is fixedly connected to one side of the extrusion groove 22; the slider 8 is slidably connected to the stent 1 and penetrates through the stent 1 to arrange the extrusion block 6; The truncation groove 23 is a circular groove; The extrusion groove 22 is a long groove, the length of which is greater than the inner diameter of the truncation groove 23, the middle of the lower end communicates with the truncation groove 23, and an extrusion inclined surface 21 is arranged on the left side to smoothly communicate with the truncation groove 23; A cutting step 5 is arranged at the lower end of the cutting chute 7; A slide bar 13 is arranged at the lower end of the cutting slide plate 11 and is fixedly connected to a blade 14, and an inclined block 10 is arranged at the top and is slidably connected to the inclined groove 3; the outside of the slide bar 13 is sleeved with a cutting spring 12; the cutting spring 12 is fixedly connected to the cutting step 5; A clamping groove 20 is arranged at the lower end of the truncation groove 23; clamping blocks 18 are symmetrically arranged on both sides of the clamping groove 20; a clamping rack 19 is arranged on one side of the clamping block 18 and meshes with a clamping gear 17; a clamping rod 16 is arranged at the upper end of the clamping gear 17; the upper end of the clamping rod 16 penetrates through the stent 1 to arrange a clamping knob 15; Scales are arranged on the outside of the stent 1, and the insertion depth of the stent 1 can be directly seen to judge the truncation length of the microcatheter 2; In this embodiment, when the device is in use, the microcatheter 2 is inserted linearly, and through the hollow structure of the stent 1, it can smoothly reach the target position. By means of the scales on the outside of the stent 1, the insertion depth can be visually judged, so as to accurately control the truncation length of the microcatheter 2 and achieve precise positioning. When it is necessary to truncate the microcatheter 2, the slider 8 is driven to slide on the stent 1 by externally pushing the pressing block 9, and then the extrusion block 6 is driven to move towards the microcatheter 2. The extrusion block 6 extrudes the microcatheter 2 to one side, making it fit against the extrusion inclined surface 21. While the extrusion block 6 is moving, through the cooperation of the inclined block 10 and the inclined groove 3 inside the device, the cutting slide plate 11 is pushed to slide in the cutting chute 7. The sliding of the cutting slide plate 11 drives the blade 14 on the slide bar 13 to move, and the blade 14 truncates the microcatheter 2 that fits against the extrusion inclined surface 21 under the action of the cutting step 5. Before the truncation operation, by rotating the clamping knob 15, the clamping rod 16 and the clamping gear 17 are driven to rotate, and then the clamping rack 19 is driven to move the clamping block 18 in the clamping groove 20 to firmly clamp the microcatheter 2, ensuring the stability of the microcatheter 2 during the truncation process; In this embodiment, the microcatheter 2 can be inserted straight through the hollow structure of the stent 1, avoiding the insertion resistance caused by the inclined surface, thereby reducing the difficulty of inserting the microcatheter 2 and improving the convenience of the operation. During the truncation process, the clamping block 18 can firmly clamp the microcatheter 2 to prevent the catheter from shifting during truncation, thereby ensuring the stability and accuracy of the truncation; In this embodiment, the extrusion and removal of the microcatheter 2 can be completed at one time by simply pressing the block 9, which not only reduces the difficulty of operating the device, but also ensures the effective removal of the microcatheter 2. In summary, the present invention provides an extrusion groove 22 at the upper end of the stent 1, a truncation groove 23 at the lower end, and connects them through an extrusion slope 21, so that the microcatheter 2 can be inserted in a straight line, avoiding the insertion resistance caused by the slope, and when truncation is required, the microcatheter 2 is squeezed to one side by the extrusion block 6, so that the microcatheter 2 fits the extrusion slope 21, and the microcatheter 2 is truncation by the blade 14 inside the extrusion block 6, thereby ensuring the truncation of the microcatheter 2, while reducing the difficulty of inserting the microcatheter 2, and improving the convenience of the operation; At the same time, the clamping groove 20 and the clamping block 18 arranged at the bottom of the bracket 1 can clamp the microcatheter 2 during the truncation process to prevent the catheter from shifting during squeezing and truncation, ensure the stability and accuracy of the truncation, reduce the pulling on the microcatheter 2 during the truncation process, and thus reduce the risk of secondary injury to the patient.
[0010] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described.
Claims
1. An intravascular catheter truncation device after interventional embolization for cerebral arteriovenous malformation, characterized in that, Comprising: A bracket, an extrusion block; The extrusion block is slidably connected inside the bracket; An extrusion groove is provided at the upper end of the bracket, a truncation groove is provided at the lower end and is slidably connected to a microcatheter, and an extrusion inclined surface is provided at the connection; an extrusion block is provided on one side of the extrusion groove, and inclined grooves are provided on both sides of the upper end; a cutting chute is provided in the middle of the extrusion block and is slidably connected to a cutting slide plate, a slider is provided at the upper end of one side, and an extrusion spring is provided at the lower end and is fixedly connected to one side of the extrusion groove; the slider is slidably connected to the bracket and penetrates the bracket to provide the extrusion block.
2. The tube truncation device for use after interventional embolization of cerebral arteriovenous malformation according to claim 1, wherein The truncation groove is a circular groove.
3. The indwelling catheter truncation device after interventional embolization for cerebral arteriovenous malformation according to claim 1, wherein The extrusion groove is an elongated groove, the length of which is greater than the inner diameter of the truncation groove, the middle of the lower end communicates with the truncation groove, and an extrusion inclined surface is provided on the left side to smoothly communicate with the truncation groove.
4. The indwelling catheter truncation device after interventional embolization for cerebral arteriovenous malformation according to claim 1, wherein, A cutting step is provided at the lower end of the cutting chute.
5. The indwelling catheter truncation device after interventional embolization for cerebral arteriovenous malformation according to claim 1, characterized in that, A slide bar is provided at the lower end of the cutting slide plate and is fixedly connected to a blade, and an inclined block is provided at the top and is slidably connected to the inclined groove; the slide bar is sleeved with a cutting spring; the cutting spring is fixedly connected to the cutting step.
6. The catheter truncation device after interventional embolization for cerebral arteriovenous malformation according to claim 3, wherein, A clamping groove is provided at the lower end of the truncation groove; clamping blocks are symmetrically provided on both sides of the clamping groove; a clamping rack is provided on one side of the clamping block and meshes with a clamping gear; a clamping rod is provided at the upper end of the clamping gear; the upper end of the clamping rod penetrates the bracket to provide a clamping knob.
7. A device for truncating a catheter left after interventional embolization of cerebral arteriovenous malformation according to claim 1, characterized in that, A scale is provided on the outer side of the bracket, and the insertion depth of the bracket can be directly seen to judge the truncation length of the microcatheter.