Wide-neck aneurysm mechanical release embolism spring ring device and use method thereof

Abstract

The invention discloses a wide-neck aneurysm mechanical release embolism spring ring device and a using method thereof, and belongs to the technical field of medical instruments. The device comprises a catheter, a catheter channel is arranged on the inner wall of the catheter, and a thrombus removal mechanism and a protection mechanism are arranged in the channel. The bolt releasing mechanism realizes quick bolt releasing of the spring ring through cooperation of a sliding shaft, a clamping plate and other parts; the protection mechanism can prevent the spring ring from being popped up accidentally due to the fact that the releasing wire falls accidentally. When in use, the catheter is pushed to a cerebrovascular segment where an aneurysm is located under the guidance of X-ray fluoroscopy and a contrast agent, a proper spring ring is selected and pushed to a preset position, the spring ring is released through a series of operations to complete embolism, and the catheter is withdrawn after the position is determined to be stable. The problems that when a spring ring is released through traditional electrolytic fusing, the position is difficult to adjust accurately, the packing effect is affected, and the recurrence risk is increased are solved, the spring ring can be released rapidly and accurately, an operation can be completed in time, and the operation risk is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a mechanical detachment embolization coil device for wide-neck aneurysms and a using method thereof. Background Art

[0002] Wide-neck aneurysms are rather intractable in cerebrovascular diseases. The ratio of the aneurysm neck width to the aneurysm body diameter is relatively large, and traditional treatment methods face many problems. Aneurysm rupture and bleeding are extremely serious consequences, with a high fatality rate and disability rate. Therefore, it is urgent to seek effective treatment means.

[0003] When the existing ordinary coils are detached, electrolysis is generally required for fusing. This means that it is difficult for doctors to accurately adjust the position of the coil according to the shape and size of the aneurysm, which may lead to uneven distribution of the coils, affect the packing effect of the aneurysm, and increase the risk of aneurysm recurrence. Therefore, we propose a mechanical detachment embolization coil device for wide-neck aneurysms. Summary of the Invention

[0004] The present invention aims to provide an innovative mechanical detachment embolization coil device for wide-neck aneurysms and a using method thereof. Through a uniquely designed embolization detachment mechanism and a protection mechanism, the problems existing in the detachment of the coil in the prior art are effectively solved, thereby improving the treatment effect of wide-neck aneurysms and reducing the surgical risk.

[0005] The mechanical detachment embolization coil device for wide-neck aneurysms of the present invention mainly includes a catheter. A catheter channel is carefully designed inside the catheter, and this channel provides a key path for subsequent operations. On the inner wall of the catheter channel, an embolization detachment mechanism is installed, and its specific structure is as follows: The inner wall of the catheter channel is slidably connected to a push rod, and the push rod plays an important role in pushing the coil in the whole device. On the outer wall of the end of the push rod far from the detachment wire, a connecting member is firmly connected. A pressure spring is sleeved on the outer wall of the connecting member, and the pressure spring plays a key role in the subsequent release process of the coil. A plurality of sliding grooves are opened on the inner wall of the connecting member, and a sliding plate is slidably connected in each sliding groove. A sliding shaft is fixedly connected to the outer wall of the sliding plate. The sliding shaft not only works in cooperation with the sliding plate, but also has a compression spring sleeved on its outer wall. A clamping plate is fixedly connected to the outer wall of the end of the sliding shaft far from the sliding plate, and the outer walls of a plurality of clamping plates are used for clamping the coil. In order to ensure the safety and stability of the device during operation, a protection mechanism is arranged on the inner wall of the push rod.

[0006] The protection mechanism includes a snap ring tightly and fixedly connected to the inner wall of the push rod. A plurality of card slots are provided on the inner wall of the snap ring. At the same time, a circular ring is fixedly connected to the outer wall of the push rod. A plurality of card blocks are fixedly connected to the outer wall of the circular ring, and these card blocks cooperate with the card slots on the snap ring to play an important protection role. On the outer wall of the push rod close to the snap ring, a fixed plate is fixedly connected. A fixed shaft is slidably connected to the inner wall of the fixed plate, and the fixed shaft penetrates through the fixed plate to the outer wall. A return spring is sleeved on the outer wall of the fixed shaft. A pull plate is fixedly connected to the outer wall of the fixed shaft close to the fixed plate, which is convenient for the operator to apply force; a limiting plate is fixedly connected to the outer wall on the side away from the pull plate, and the limiting plate cooperates with the fixed plate to effectively control the movement of the return spring. In addition, a positioning groove is provided on the inner wall of the push rod, and the inner wall of the positioning groove is slidably connected to the outer wall of the limiting plate, further enhancing the stability and reliability of the entire protection mechanism.

[0007] The usage method of the mechanical detachment embolization coil device for wide-neck aneurysms of the present invention is as follows:

[0008] s1. Preoperative preparation and catheter positioning: Before the operation starts, the medical team needs to comprehensively evaluate the patient's condition, including detailed analysis of key parameters such as the location, size, shape, and neck width of the aneurysm. Based on these evaluation results, select a spring coil of appropriate specifications and ensure that the surgical equipment is in good condition and functions properly. Under the dual guidance of X-ray fluoroscopy and contrast agent, the doctor, relying on professional skills and rich experience, slowly pushes the catheter to the cerebrovascular segment near the aneurysm with extremely cautious operation. During this process, it is necessary to continuously monitor the position of the catheter, use the image information real-time feedback by the X-ray fluoroscopy equipment to ensure that the catheter reaches the target area accurately. At the same time, closely monitor the patient's vital signs to prevent accidental damage to the surrounding vascular tissues caused by the catheter pushing process and trigger unnecessary complications.

[0009] s2. Spring coil selection and installation: According to the specific situation of the aneurysm, accurately select a suitable spring coil from a variety of spring coils of different specifications. The selection of the spring coil is crucial, and spring coils that are too large or too small may affect the embolization effect. After selection, install the spring coil correctly on the card board according to the design requirements of the device to ensure that the spring coil is firmly clamped on the outer wall of the card board, making preparations for the subsequent smooth pushing and release.

[0010] S3. Coil Delivery and Deployment: By operating the pusher rod, the installed coil is slowly pushed along the catheter channel to the predetermined position within the aneurysm. During the pushing process, constantly pay attention to the pushing force and speed to avoid coil displacement or damage to the blood vessel wall due to improper operation. When the coil reaches the predetermined position, carefully release the coil according to the operation specifications, allowing it to gradually deploy within the aneurysm cavity and naturally form a basket-like structure. This basket-like structure is the basis for effective embolization. The formation process requires the doctor to precisely control the release rhythm and force to ensure the uniform distribution of the coils within the aneurysm cavity and initially fill the aneurysm.

[0011] S4. Preparation for Detaching the Coil: After the initial deployment of the coil, enter the preparation stage for detaching the coil. The operator uses a finger or a special instrument to pull the pull plate upward. When the pull plate is stressed, it drives the fixed shaft to move upward. As the fixed shaft moves, the sliding plate connected to it will also move upward synchronously, thereby driving the limit plate to move. During the movement of the limit plate, it cooperates with the fixed plate to squeeze the return spring. When the fixed shaft is completely withdrawn from the positioning groove, it means that the preparation is complete. At this time, the protection mechanism is in a state of waiting to be unlocked, making key preparations for detaching the coil.

[0012] S5. Operation of Detaching the Coil: After confirming that the preparation is correct, first gently rotate the detaching wire with a professional tool or a finger. The rotation of the detaching wire will drive the connected ring to rotate synchronously. When the ring rotates, it will drive the blocks on its outer wall to rotate. When it is observed that both blocks are accurately aligned with the slots on the inner wall of the snap ring, then pull the detaching wire outward. As the detaching wire is smoothly withdrawn from the pusher rod, the two originally restricted clamping plates are released from the restriction. At this time, the compression spring that was originally in a compressed state instantly releases its elastic force, driving the sliding shaft to expand outward. The expansion of the sliding shaft further drives the clamping plates to expand outward, enabling the coil that was originally restricted by the sliding shaft to be released. At the same time, the pressure spring that was originally compressed by the coil is also released, and the pressure spring quickly rebounds. The powerful elastic force generated by it forcefully ejects the coil, thus successfully achieving the detachment of the coil and achieving the purpose of embolizing the aneurysm. During the entire detachment process, the doctor needs to rely on real-time imaging monitoring equipment, such as X-ray fluoroscopy or angiography equipment, to closely observe the position and state of the coil to ensure that the coil is accurately filled within the aneurysm and there are no displacements or other abnormal conditions.

[0013] S6. Postoperative examination and catheter removal: After the coil detachment is completed, use the imaging monitoring equipment again to comprehensively check whether the position of the coil in the aneurysm is stable, confirm that there is no risk of displacement, and that the aneurysm is effectively embolized. After ensuring that everything is normal, carefully withdraw the catheter from the patient's body according to the strict operation procedure. The withdrawal process also requires careful operation to avoid unnecessary damage to the blood vessels. After the operation, closely observe and care for the patient, monitor the patient's vital signs and recovery, and promptly handle possible complications.

[0014] The present invention has the following remarkable beneficial effects:

[0015] Fast and accurate thrombus detachment: Through the carefully designed sliding shaft structure, when the sliding shaft expands outwards, it can quickly drive the clamping plate to expand outwards together, thereby timely releasing the coil. At the same time, the springback effect of the compression spring enables the coil to quickly pop out, achieving fast and accurate thrombus detachment. This characteristic is crucial for completing the embolization operation in a race against time during the operation and promptly closing the aneurysm, effectively reducing the surgical risk and improving the success rate of the operation.

[0016] Reliable protection mechanism: The set release wire and the protection mechanism cooperate with each other. After the sliding plate moves upwards to drive the limiting plate to squeeze the reset spring and the fixed shaft is pulled out from the positioning groove, by rotating the release wire to drive the ring and the clamping block to rotate, the release wire can only be pulled when the clamping block accurately aligns with the card slot. This design effectively prevents the accidental detachment of the release wire and avoids the accidental ejection of the coil, greatly improving the safety and reliability of the device during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly and intuitively display the technical solutions of the embodiments of the present invention, the following provides a detailed introduction to the drawings required for describing the embodiments. These drawings are an important part of the technical solutions of the present invention and are of great help for those of ordinary skill in the art to understand the structure and working principle of the present invention. Without creative efforts, based on these drawings, technicians can also obtain other relevant drawings to further deeply study the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention, showing the overall appearance of the device and the approximate positional relationship of the main components, giving readers a preliminary overall impression of the device.

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention. Through this cross-sectional view, the specific layout and connection relationship of components such as the catheter channel, thrombus detachment mechanism, and protection mechanism inside the catheter can be clearly seen, which helps to deeply understand the internal structure of the device.

[0020] Figure 3This is a cross-sectional view of the connecting member structure of the present invention, focusing on the key component of the connecting member, and showing in detail the structure and connection method of components such as the chute, sliding plate, sliding shaft, and compression spring inside the connecting member, providing an important reference for understanding the working principle of the bolt removal mechanism.

[0021] Figure 4 For the present invention Figure 3 The enlarged view at position A in Figure 3 enlargely shows the local structure at position A in

[0022] Figure 5 This is a cross-sectional view of the conduit structure of the present invention, specifically showing the internal structure of the conduit, including the conduit channel and the connection relationship between the conduit and other components, which helps to understand the role and working principle of the conduit in the whole device.

[0023] Figure 6 For the present invention Figure 5 The enlarged view at position B in Figure 5 enlarges the local structure at position B in

[0024] In the attached drawings, the list of components represented by each reference numeral is as follows: 1. Conduit; 101. Conduit channel; 2. Bolt removal mechanism; 201. Pushing rod; 202. Release wire; 203. Connecting member; 204. Pressure spring; 205. Chute; 206. Sliding plate; 207. Sliding shaft; 208. Compression spring; 209. Clamping plate; 210. Spring coil; 3. Protection mechanism; 301. Snap ring; 302. Card slot; 303. Ring; 304. Block; 305. Fixed plate; 306. Fixed shaft; 307. Pulling plate; 308. Return spring; 309. Limiting plate; 310. Positioning groove. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be described comprehensively, meticulously, and in-depth in combination with the attached drawings in the embodiments of the present invention. It should be clear that the described embodiments are only a part of the embodiments of the present invention, not all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0026] Please refer to Figures 1-6As shown, the mechanical detachment embolization coil device for wide-neck aneurysms of the present invention is based on the catheter 1. The inner wall of the catheter 1 is carefully provided with a catheter channel 101, which provides a stable and smooth path for the pushing operation of the pushing rod 201 and is the key channel for realizing the entire embolization process. On the inner wall of the catheter channel 101, a detachment mechanism 2 is installed.

[0027] In the detachment mechanism 2, the pushing rod 201 is slidably connected to the inner wall of the catheter channel 101. This connection method not only ensures that the pushing rod 201 can move flexibly within the catheter channel 101 but also guarantees the stability of the pushing process. One end of the pushing rod 201 away from the detachment wire 202 is firmly connected to the connecting piece 203 by high-strength welding or other reliable fixing methods. When the detachment wire 202 is pulled out from the pushing rod 201, this action will trigger a series of chain reactions, causing the two clamping plates 209 to be released from restriction, creating conditions for the release of the coil. A pressure spring 204 is sleeved on the outer wall of the connecting piece 203. The pressure spring 204 plays a key role in the release process of the coil, and the elastic potential energy stored in it is converted into the power to push the coil out at the right time. A plurality of sliding grooves 205 are provided on the inner wall of the connecting piece 203, and a sliding plate 206 adapted to each sliding groove 205 is installed in each sliding groove 205. The sliding plate 206 can slide freely within the sliding groove 205. A sliding shaft 207 is fixedly connected to the outer wall of the sliding plate 206, and a compression spring 208 is sleeved on the outer wall of the sliding shaft 207. When the device is in a ready state, the compression spring 208 is in a compressed state, storing a certain amount of elastic potential energy. One end of the sliding shaft 207 away from the sliding plate 206 is fixedly connected to a clamping plate 209, and the outer walls of a plurality of clamping plates 209 are used for clamping the coil 210. When the sliding shaft 207 expands outward, it will drive the clamping plate 209 to expand outward together by virtue of its fixed connection relationship with the clamping plate 209, thereby realizing the release of the coil 210. To ensure the safety and stability of the entire detachment process, a protection mechanism 3 is provided on the inner wall of the pushing rod 201.

[0028] One of the core components of the protection mechanism 3 is the snap ring 301. The outer wall of the snap ring 301 and the inner wall of the push rod 201 are integrally formed through a tight fixed connection method. A plurality of card slots 302 are formed on the inner wall of the snap ring 301, and these card slots 302 cooperate with the card blocks 304 on the ring 303 fixedly connected to the outer wall of the push rod 201 to form an effective protection barrier to prevent the release wire 202 from accidentally falling off. A plurality of card blocks 304 are fixedly connected to the outer wall of the ring 303, and the positions and shapes of these card blocks 304 are precisely matched with the card slots 302. On the outer wall of the push rod 201 close to the snap ring 301, a fixing plate 305 is fixedly connected. A fixing shaft 306 is slidably connected to the inner wall of the fixing plate 305, and the fixing shaft 306 penetrates through the fixing plate 305 to the outer wall. A return spring 308 is sleeved on the outer wall of the fixing shaft 306, and the return spring 308 plays an important reset role during the operation of the entire protection mechanism. A pull plate 307 is fixedly connected to the outer wall of the fixing shaft 306 close to the fixing plate 305, and the pull plate 307 provides a convenient force application component for the operator. A limiting plate 309 is fixedly connected to the outer wall of the fixing shaft 306 away from the pull plate 307, and the limiting plate 309 cooperates with the fixing plate 305 to precisely control the compression and extension process of the return spring 308. A positioning groove 310 is formed on the inner wall of the push rod 201, and the inner wall of the positioning groove 310 is slidably connected to the outer wall of the limiting plate 309, further enhancing the stability and reliability of the protection mechanism and ensuring the safety of the entire device during operation.

[0029] A specific application of this embodiment is as follows: When a medical team needs to use this device for surgical treatment, it first enters the preoperative preparation stage. Comprehensively evaluate the patient's physical condition and the detailed situation of the aneurysm, including using advanced medical imaging techniques such as cerebral angiography, magnetic resonance angiography, etc. to obtain key parameters such as the accurate location, size, shape, and aneurysm neck width of the aneurysm. According to these parameters, select the most suitable coil 210 for the patient's aneurysm situation from various specifications of coils. In the operating room, ensure that the surgical equipment is in good condition and functions normally, including checking and debugging the catheter 1, the push rod 201, and other related components.

[0030] Under the guidance of fluoroscopy and contrast agent, the doctor begins the pushing operation of catheter 1. The doctor holds catheter 1 and slowly pushes catheter 1 along the patient's blood vessel path to the cerebrovascular segment near the aneurysm in an extremely cautious operation manner. During the pushing process, continuously observe the position of catheter 1 through the fluoroscopy equipment, and according to the real-time feedback image information, continuously adjust the pushing direction and force to ensure that catheter 1 reaches the target area accurately. At the same time, closely monitor the patient's vital signs, such as heart rate, blood pressure, blood oxygen saturation, etc. Once an abnormal situation is found, immediately stop the pushing operation and take corresponding treatment measures to prevent accidental damage to the surrounding vascular tissue caused by the catheter pushing process and trigger serious complications.

[0031] When catheter 1 reaches the predetermined position, according to the specific situation of the aneurysm, the selected coil 210 is correctly installed on the clamping plate 209. The installation process needs to be carried out strictly in accordance with the operating specifications to ensure that coil 210 is firmly clamped on the outer wall of clamping plate 209 to avoid falling off or displacement during subsequent pushing and releasing processes. After the installation is completed, by operating the push rod 201, coil 210 is slowly pushed along the catheter channel 101 to the predetermined position inside the aneurysm. During the pushing process, the doctor should always pay attention to the pushing force and speed to avoid displacement of coil 210 or damage to the blood vessel wall caused by improper operation. Use the fluoroscopy equipment to observe the position change of coil 210 in real time. When coil 210 reaches the predetermined position, carefully release coil 210 in accordance with the operating specifications to make it gradually unfold in the aneurysm cavity and naturally form a basket-like structure. This process requires the doctor to precisely control the release rhythm and force to ensure that coil 210 is evenly distributed in the aneurysm cavity and initially tamponade the aneurysm.

[0032] After the initial deployment of coil 210 is completed, enter the preparation stage for detaching the coil. The operator uses a finger or a special instrument to pull the pull plate 307 upward. After being stressed, pull plate 307 drives the fixed shaft 306 to move upward. As the fixed shaft 306 moves, the connected slide plate 206 will also move upward synchronously, thereby driving the limit plate 309 to move. During the movement of the limit plate 309, it cooperates with the fixed plate 305 to squeeze the return spring 308. When the fixed shaft 306 is completely pulled out of the positioning groove 310, it means that the preparation work is ready, and at this time the protection mechanism is in a state of waiting to be unlocked.

[0033] After confirming that the preparatory work is correct, start the operation of releasing the detachable coil. First, gently rotate the detaching wire 202 with a professional tool or finger. The rotation of the detaching wire 202 will drive the synchronous rotation of the connected ring 303. When the ring 303 rotates, it will drive the rotation of the clamping block 304 on its outer wall. The operator observes the image of the X-ray fluoroscopy device. When seeing that both clamping blocks 304 are accurately aligned with the slots 302 on the inner wall of the clamping ring 301, at this time, pull the detaching wire 202 outwards. As the detaching wire 202 is smoothly withdrawn from the pushing rod 201, the two originally restricted clamping plates 209 are released from the restriction.

[0034] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A device for mechanically releasing embolic coils from wide-necked aneurysms, comprising a catheter (1), characterized in that: The inner wall of the catheter (1) is provided with a catheter channel (101), and the inner wall of the catheter channel (101) is provided with a bolt removal mechanism (2); the bolt removal mechanism (2) comprises: the inner wall of the catheter channel (101) is slidably connected with a push rod (201), the outer wall of the push rod (201) away from the release wire (202) is fixedly connected with a connecting piece (203), the outer wall of the connecting piece (203) is sleeved with a pressure spring (204), and the inner wall of the connecting piece (203) is provided with a plurality of sliding grooves (205) The inner walls of several sliding grooves (205) are slidably connected to slide plates (206), the outer walls of several slide plates (206) are fixedly connected to sliding shafts (207), the outer walls of several sliding shafts (207) are sleeved with extrusion springs (208), the outer walls of several sliding shafts (207) away from the slide plates (206) are fixedly connected to clamping plates (209), the outer walls of several clamping plates (209) are clamped with spring rings (210), and the inner wall of the push rod (201) is provided with a protective mechanism (3).

2. A wide-necked aneurysm mechanical detachment embolization coil device according to claim 1, characterized in that: The protection mechanism (3) comprises a snap ring (301), the outer wall of the snap ring (301) being fixedly connected to the inner wall of the push rod (201).

3. The wide-necked aneurysm mechanical detachment embolization coil device according to claim 2, characterized in that: The inner wall of the clamping ring (301) is provided with a plurality of clamping grooves (302), and the outer wall of the pushing rod (201) is fixedly connected with a circular ring (303).

4. The wide-necked aneurysm mechanical detachment embolization coil device according to claim 3, characterized in that: A plurality of clamping blocks (304) are fixedly connected to the outer wall of the circular ring (303), and a fixing plate (305) is fixedly connected to the outer wall of the push rod (201) on one side close to the clamping ring (301).

5. The wide-necked aneurysm mechanical detachment embolization coil device according to claim 4, characterized in that: The inner wall of the fixing plate (305) is slidably connected with a fixing shaft (306), and the fixing shaft (306) passes through the fixing plate (305) to the outer wall.

6. The wide-necked aneurysm mechanical detachment embolization coil device according to claim 5, characterized in that: The outer wall of the fixed shaft (306) is sleeved with a return spring (308); the outer wall of one end of the fixed shaft (306) close to the fixed plate (305) is fixedly connected to a pull plate (307); and the outer wall of one side of the fixed shaft (306) away from the pull plate (307) is fixedly connected to a limit plate (309).

7. The wide-necked aneurysm mechanical detachment embolization coil device according to claim 6, characterized in that: The inner wall of the push rod (201) is provided with a positioning groove (310), and the inner wall of the positioning groove (310) is slidably connected to the outer wall of the limiting plate (309).

8. A method for using the wide-necked aneurysm mechanical detachment embolization coil device according to any one of claims 1 to 7, characterized in that: The following steps are involved: s1. Under the guidance of X-ray fluoroscopy and contrast agent, the catheter (1) is slowly pushed to the cerebral vascular segment close to the aneurysm; s2. According to the size, shape and width of the aneurysm, a suitable coil (210) is selected and installed on the device; s3. Pushing the coil (210) to a predetermined position within the aneurysm so that it gradually expands within the aneurysm cavity to form a basket-like structure; s4. Pull the pull plate (307) upward to drive the fixed shaft (306) to move upward, so that the limit plate (309) cooperates with the fixed plate (305) to squeeze the return spring (308). When the fixed shaft (306) is completely pulled out of the positioning groove (310), the release wire (202) is rotated to drive the ring (303) and the block (304) to rotate. When the two blocks (304) are aligned with the groove (302), the release wire (202) is pulled outward; s5. After the release wire (202) is pulled out, the extrusion spring (208) is released, driving the slide shaft (207) to expand outward, thereby driving the card plate (209) to expand, releasing the spring coil (210), and the pressure spring (204) rebounds to eject the spring coil (210), completing the bolt removal; s6. After confirming that the coil is in a stable position and has no risk of displacement, remove the catheter (1) from the patient's body according to the operating procedures.

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