Spring ring releasing structure and spring ring system

Abstract

The invention relates to a spring ring releasing structure and a spring ring system. The spring ring releasing structure comprises a pushing rod, a notch elastic piece located in the pushing rod and a traction wire connected with the notch elastic piece. The notch elastic piece is provided with a notch used for clamping a spring ring ball head, and the outer side wall of the notch elastic piece abuts against the inner wall of the pushing rod. A releasing groove is formed in the far end of the pushing rod, when the outer side wall of the notch elastic piece abuts against the groove bottom of the releasing groove, the caliber of the notch is larger than the diameter of the spring ring ball head, and when the outer side wall of the notch elastic piece abuts against the inner wall, outside the releasing groove, of the pushing rod, the caliber of the notch is smaller than the diameter of the spring ring ball head. The defects that an existing spring ring release structure limits the filling effect of a spring ring in hemangioma and the tube kicking phenomenon is likely to be caused are overcome, the embolism precision is improved in a free torsion air-finding connection mode, the fracture risk is reduced through low-pressure filling, meanwhile, the reliability of mechanical release is kept, and the safety of the embolism is improved. The method is a targeted upgrade of an interventional embolism spring ring release technology.

Description

Technical Field

[0001] This application relates to the field of medical technology, and in particular to a coil release structure and coil system. Background Technology

[0002] Intracranial aneurysms are a common cerebrovascular disease in neurosurgery, often referred to as intracranial "time bombs." They refer to weak points in the walls of intracranial arteries that bulge abnormally outward under the influence of blood flow and blood pressure, resembling tumors, hence the name aneurysm. Intracranial aneurysms are not true tumors, but once they rupture, the condition is critical, causing severe headaches, nausea, vomiting, convulsions, and altered consciousness, and even death. Treatment for intracranial aneurysms mainly includes open craniotomy clipping and interventional embolization. Interventional embolization, as a major treatment method, has become an important approach for treating intracranial aneurysms, from Serbinnenko's pioneering use of detachable balloon embolization techniques to Guglielmi's development of the distal end of electrolytic platinum microcoils (GDC) in 1991. Interventional embolization is a treatment method that involves inserting a coil into the femoral artery and then through the blood vessel to the intracranial aneurysm. The distal end of the coil is used to fill the aneurysm, preventing blood flow from entering the cerebral aneurysm. This separates the aneurysm from the blood flow, allowing a thrombus to form within the aneurysm and gradually organize, eventually fusing with the blood vessel wall. This eliminates the risk of aneurysm rupture. Interventional embolization is a minimally invasive procedure with minimal trauma, rapid recovery, and good results.

[0003] Currently, there are four main methods for distal release of coils in interventional embolization therapy: thermal release, electrolytic release, mechanical release, and hydrolytic release. Among them, mechanical release, which uses mechanical means to push and release the distal end of the coil, is a mature method. However, mechanical release still has certain drawbacks: due to the release structure, the distal end of the coil and the pushing device are fixed in conventional mechanical release. During delivery, the distal end of the coil is constantly twisted and deformed. The fixed position of the tail end makes it difficult for the coil to freely fill empty spaces in the hemangioma. The distal end of the coil is a pre-shaped metal wire, which can only be delivered in a pre-shaped form. Filling empty spaces requires more force, increasing the pressure inside the aneurysm and posing a risk of hemangioma rupture. In addition, the coil is compressed in the microcatheter before the procedure. When released, it will quickly return to the preset shape. When it separates from the pushing rod, it will generate a brief mechanical impact, resulting in a tube-kicking phenomenon. Summary of the Invention

[0004] Therefore, the purpose of this invention is to overcome the shortcomings of existing coil release structures, which limit the filling effect of coils within aneurysms and easily lead to tube kicking. This invention provides a coil release structure and coil system. The invention improves embolization accuracy through a free-torsional, hole-finding connection method, reduces the risk of rupture through low-pressure packing, and retains the reliability of mechanical release, representing a targeted upgrade to interventional embolization coil release technology.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A spring coil release structure includes a push rod, a slotted spring piece located inside the push rod, and a traction wire connected to the slotted spring piece; the slotted spring piece has a slot for clamping a spring coil ball head, and the outer side wall of the slotted spring piece abuts against the inner wall of the push rod; a release groove is formed at the distal end of the push rod, and when the outer side wall of the slotted spring piece abuts against the bottom of the release groove, the diameter of the groove is larger than the diameter of the spring coil ball head, and when the outer side wall of the slotted spring piece abuts against the inner wall of the push rod outside the release groove, the diameter of the groove is smaller than the diameter of the spring coil ball head.

[0006] The working principle of this application is as follows: Throughout the process of pushing the spring coil into the aneurysm, the outer wall of the slotted spring piece always abuts against the inner wall of the push rod outside the release groove. The inner wall of the push rod generates a radial constraint force on the slotted spring piece, tightly squeezing the spring piece together. The diameter of the slot on the spring piece for clamping the ball head of the spring coil is smaller than the diameter of the ball head of the spring coil. The ball head of the spring coil is firmly clamped in the slot, ensuring that there is no relative movement between the spring coil and the push rod during the pushing process. When the spring coil is delivered to the predetermined aneurysm... After positioning, the spring coil, with its air-seeking effect, deforms and twists to continuously fill the aneurysm until it is fully filled. The push rod continues to be pushed forward. When the outer wall of the slotted spring piece moves to and abuts the bottom of the release groove at the distal end of the push rod, the radial constraint force on its outer wall decreases. Due to its elasticity, the spring piece expands outward. This expansion causes the diameter of the slot to be larger than the diameter of the spring coil's ball head. The clamping force of the slot on the ball head disappears, and the spring coil can easily separate from the push rod, remaining inside the aneurysm, thus completing the release of the spring coil.

[0007] The advantage of this application lies in the fact that conventional mechanical release methods use fixed structures for the spring coil and the pushing device, resulting in the spring coil being twisted during delivery and having a fixed tail end position. This restricts the tail end's ability to actively adapt to irregular spaces within the aneurysm, forcing it to passively fill the space according to a pre-shaped form. This can easily lead to dead zones of embolism, requiring additional force. In contrast, the grooved spring clip of this application uses a wrap-around clamping method to hold the ball head of the spring coil. The groove diameter of the spring clip is only slightly larger than the diameter of the ball head. This allows the ball head to be released by the deformation of the outer wall of the elastic clamp after falling into the release groove. This means that a "ball-head" connection is formed between the ball head and the groove, allowing the ball head to rotate and swing within a certain angle range within the groove. This gives the spring coil free rotation capability during delivery and filling, meaning that when the spring coil fills the aneurysm space, it can freely twist and actively "find" the space. The presence of free space within the aneurysm enhances its ability to locate voids, adapting to the filling needs of irregular aneurysm cavities and achieving more uniform and comprehensive embolization. This avoids incomplete embolization, eliminates the need for external force compression, significantly reduces pressure on the aneurysm wall, and ensures tighter packing. This not only guarantees embolization effectiveness but also reduces the risk of rupture from an operational mechanics perspective, greatly improving safety. This application represents a key breakthrough in traditional mechanically released coil embolization techniques, overcoming the limitations of limited packing, excessive pressure, and the risk of aneurysm rupture. It improves embolization accuracy with a freely torsional, void-finding connection method, reduces the risk of rupture with low-pressure packing, and retains the reliability of mechanical release. This is a targeted upgrade to interventional embolization coil release technology.

[0008] Furthermore, the slotted spring includes an elastic ball socket, the inner cavity of which forms the slot, and an elastic lug connected at one end to the elastic ball socket, the other end of which abuts against the inner wall of the push rod. In this way, the arc-shaped inner cavity of the elastic ball socket fits more closely with the ball head of the spring coil, and combined with the continuous radial pressure of the elastic lug, it forms a wrap-around clamping mechanism, which is more secure than the clamping of a flat slot and can accommodate ball heads with slight size differences, improving adaptability. The elastic expansion process of the elastic lug is gradual and controllable, avoiding the mechanical impact during rigid structure separation, resulting in less mechanical disturbance when the spring coil is released, further reducing the risk of "kicking the tube".

[0009] Furthermore, the number of elastic lugs is at least two sets, and the elastic lugs are evenly distributed around the groove circumferentially. The number and relative position of the release grooves are consistent with the elastic lugs. In this way, multiple sets of elastic lugs expand elastically synchronously, the force distribution is uniform, there are no local stress abrupt changes, and the kicking phenomenon is further reduced.

[0010] Furthermore, the elastic ball socket and the elastic ear piece are integrally formed, with the ends of the elastic ear piece flaring outwards. This integral design avoids stress concentration at the joints, resulting in greater durability. The flared ear piece has a wider range of elastic deformation, improving the degree of deformation during clamping and releasing, enhancing the stability of clamping and releasing, and reducing operational difficulty.

[0011] Furthermore, the elastic ear piece includes a first bent portion, a second bent portion, and a third bent portion integrally formed and connected in sequence. The first bent portion connects to the elastic ball socket, and the bent protrusion of the third bent portion abuts against the inner wall of the push rod. In this way, the elastic deformation of the three-segment bent structure is controllable, and with its circumferentially uniform distribution, it can provide a continuous and symmetrical radial clamping force. The elastic recovery process of the bent portion is gradual, and the force transmission is smooth, without rigid impact. Compared with straight ear pieces, this further reduces mechanical disturbance during release and completely avoids the "kick-the-tube" phenomenon. The integrally formed structure avoids the risk of breakage, and the elastic deformation range of the bent portion is larger, making it resistant to repeated push and release operations and resulting in a longer service life.

[0012] Furthermore, the push rod includes an inner push rod and an outer push rod that is slidably sleeved on the outside of the inner push rod. The release groove is arranged along the circumference of the inner push rod, and the inner wall of the outer push rod forms the bottom of the release groove.

[0013] Thus, when the outer wall of the slotted spring piece enters the release groove and abuts against the inner wall of the outer push rod, the diameter of the slot is larger than the diameter of the spring coil ball head; when the outer wall of the slotted spring piece abuts against the inner wall of the inner push rod, the diameter of the slot is smaller than the diameter of the proximal ball head of the spring coil.

[0014] It should be noted that the double-nested inner and outer push rods introduce a new release method. Release is achieved by axially moving the through-hole to the outer wall of the elastic lug, allowing for controllable movement and avoiding potential positional deviations that can occur with the single release method where the traction wire pulls the elastic lug. This design is suitable for the precise release requirements of complex tumors. The outer push rod provides a stable bottom for the release groove, and the two rods support each other, reducing rod deformation during pushing, ensuring smooth force transmission to the elastic piece, and lowering the risk of structural failure.

[0015] Furthermore, developing material is provided on both the slotted spring and the push rod.

[0016] It should be noted that imaging blocks or imaging particles can be embedded in key positions on the groove spring and the inner wall or distal tube of the push rod, or imaging metal powder can be incorporated into the groove spring and push rod during manufacturing to form a tube sufficient to present imaging. At the same time, there will be a MARK mark at the proximal end of the push rod, which can identify the relative displacement when the doctor pushes the proximal end, making it easy to intuitively judge the pushing distance.

[0017] Furthermore, the diameter of the traction wire is 0.1 mm to 1 mm, and the traction wire is made of high-density polyethylene, nylon, polyether ether ketone (PEEK), poly(p-phenylene terephthalamide) (PPTA), polyimide (PI), polyglycolic acid (PGA), polycaprolactone (PCL), or polylactic acid (PLA).

[0018] Furthermore, the push rod is made of sodium hypochlorite tube.

[0019] This application also provides a spring coil system, including a spring coil and a spring coil release structure as described above.

[0020] Furthermore, the spring coil includes a spring coil body, an anti-unspinning cap disposed at one end of the spring coil body, a ball-head connecting rod disposed at the other end of the spring coil body, and an anti-unspinning wire connecting the anti-unspinning cap and the ball-head connecting rod respectively; one end of the ball-head connecting rod is limited inside the spring coil body, the other end of the ball-head connecting rod is a ball, and the slotted spring clip holds the ball.

[0021] In this way, the ball-head connecting rod of the spring coil is clamped and fixed by the ball head and the slotted spring piece of the release structure. The anti-unwinding wire connects the anti-unwinding end cap and the ball-head connecting rod to prevent the spring coil from twisting or unwinding during the transportation process, ensuring that it arrives at the cavity in a pre-shaped posture. The flexible cooperation between the ball-head connecting rod and the release structure, combined with the anti-unwinding design, allows the spring coil to rotate freely to find the cavity without affecting the filling density due to torsional deformation, which is suitable for irregular cavities. The anti-unwinding structure reduces the mechanical internal loss during the transportation of the spring coil and has no additional torsional impact during release. Combined with the smooth release of the slotted spring piece, it provides double protection to avoid "kicking" and damage to the cavity wall.

[0022] Furthermore, developing material is also provided on the spring coil. The developing material can be provided on the anti-unspinning head and the spring coil body, and the implantation of the developing material is similar to the implantation method of the slot spring / push rod.

[0023] The application method of the spring coil system in this application is as follows: Step 1: After establishing vascular access, confirm the size of the hemangioma and select the appropriate size and specifications of coil; Step 2: Remove the spring coil and spring coil release mechanism, and check the equipment for damage or kinking; Step 3: Before use, rinse the spring coil and spring coil release mechanism with heparinized saline, and immerse the spring coil and spring coil release mechanism in heparinized saline. Step 4: Use an introductory sheath to help the coil enter the microcatheter; Step 5: Slowly push the spring coil until the push rod enters the microcatheter, remove the guide sheath, and continue to push the traction wire into the hemangioma for packing; Step 6: Under the fluoroscopic guidance of DSA, after the spring coil is packed, the imaging point at the distal end of the spring coil coincides with the imaging point at the tip of the microcatheter, and release begins at the appropriate position; Step 7: By pulling / pushing the traction wire or moving the inner push rod radially, the outer wall of the slotted spring piece abuts into the release groove, thus completing the release; Step 8: After the release is complete, remove the push rod. During the operation, the doctor will determine the number of coils to pack based on the condition of the hemangioma and proceed with subsequent procedures. Step 9: After packing is completed, perform contrast imaging to check the surgical outcome; Step 10: After confirming that everything is correct, remove the instruments and complete the surgical treatment.

[0024] Furthermore, the spring coil body is made of a single wire material of platinum-tungsten or nickel-titanium alloy, and the diameter of the single wire of the spring coil is 0.001mm to 0.5mm.

[0025] Furthermore, the anti-unwinding filament is made of high-density polyethylene material, and the diameter of the anti-unwinding filament is 0.01 mm to 0.5 mm.

[0026] Compared with the prior art, the beneficial effects of the present invention are: (1) The advantage of this application is that the conventional mechanical release spring coil and push device have a fixed structure, which causes the spring coil to be twisted during the delivery process. The tail end position is fixed and the tail end is restricted. It cannot actively adapt to the irregular empty space in the aneurysm. It can only be passively filled according to the pre-shaped shape, which is prone to embolization dead angle and requires additional force. In contrast, the grooved spring clip of this application clamps the ball head of the spring coil in a wrap-around clamping manner. The groove diameter of the grooved spring clip is only slightly larger than the diameter of the ball head. This allows the ball head to be released by the deformation of the outer wall of the elastic clamp after falling into the release groove. This means that a "ball head" connection is formed between the ball head and the groove. The ball head can rotate and swing within a certain angle range in the groove, giving the spring coil free rotation ability during delivery and filling. This means that when the spring coil fills the aneurysm space, the spring coil can twist freely and can actively "find". With ample space within the tumor, it has a stronger ability to find empty spaces, adapting to the filling needs of irregular tumor cavities, achieving more uniform and comprehensive filling, avoiding incomplete embolization, eliminating the need for external force to compress, significantly reducing the pressure on the tumor wall, and at the same time, the filling is more compact, ensuring the embolization effect, while reducing the risk of rupture from the perspective of operation mechanics, and greatly improving safety.

[0027] (2) The core breakthrough of this application is that the traditional mechanical release spring coil packing is limited, the pressure is too high and the risk of aneurysm rupture is easy. The connection method of free torsion to find the void improves the accuracy of embolization, and the low pressure packing reduces the risk of rupture. At the same time, the reliability of mechanical release is retained. It is a targeted upgrade of interventional embolization spring coil release technology. Attached Figure Description

[0028] Figure 1 This is a schematic diagram showing the connection between the spring coil release structure and the spring coil in one embodiment; Figure 2 This is a schematic diagram of the inner push rod and the outer push rod sliding relative to each other in one embodiment to release the release (where the dashed line shape represents the slotted spring in the released state). Figure 3 This is a schematic diagram of the slotted spring sheet in one embodiment; Figure 4 This is a schematic diagram of the deformation of the slotted spring in the unreleased and released states in another embodiment (where the dashed lines represent the released slotted spring). Figure 5 This is a schematic diagram illustrating the application of a spring coil release structure and the spring coil being pushed in a microcatheter in one embodiment.

[0029] 1-Push rod, 10-Release groove, 11-Inner push rod, 12-Outer push rod, 2-Gate spring, 20-Gate, 21-Elastic ball socket, 22-Elastic ear, 221-First bend, 222-Second bend, 223-Third bend, 3-Traction wire, 100-Spring coil, 101-Spring coil body, 102-Anti-unwinding end cap, 103-Ball head connecting rod, 104-Anti-unwinding wire, 200-Microcatheter. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this application. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Example 1 like Figure 1 As shown, a spring coil release structure includes a push rod 1, a slotted spring piece 2 located inside the push rod 1, and a traction wire 3 connecting the slotted spring piece 2. The slotted spring piece 2 has a slot 20 for clamping the ball head of the spring coil 100, and the outer wall of the slotted spring piece 2 abuts against the inner wall of the push rod 1. A release groove 10 is opened at the far end of the push rod 1. When the outer wall of the slotted spring piece 2 abuts against the bottom of the release groove 10, the diameter of the slot 20 is larger than the diameter of the ball head of the spring coil 100. When the outer wall of the slotted spring piece 2 abuts against the inner wall of the push rod 1 outside the release groove 10, the diameter of the slot 20 is smaller than the diameter of the ball head of the spring coil 100.

[0034] The working principle of this application is as follows: During the entire process of the spring coil 100 being pushed into the aneurysm, the outer wall of the slotted spring piece 2 always abuts against the inner wall of the push rod 1 outside the release groove 10. The inner wall of the push rod 1 generates a radial constraint force on the slotted spring piece 2, tightly squeezing the spring pieces together. The diameter of the slot 20 on the spring piece for clamping the ball head of the spring coil 100 is smaller than the diameter of the ball head of the spring coil 100. The ball head of the spring coil 100 is firmly clamped in the slot 20, ensuring that there is no relative movement between the spring coil 100 and the push rod 1 during the pushing process; when the spring coil 100 is delivered to the pre- After the aneurysm is located, the spring coil 100 has a void-finding effect and can deform and twist to continuously fill the aneurysm until the filling effect is achieved. Continue to push the push rod 1 forward. When the outer wall of the grooved spring piece 2 moves to and abuts the bottom of the release groove 10 at the far end of the push rod 1, the radial constraint force on its outer wall decreases. Due to its own elasticity, the spring piece will expand outward. This expansion action makes the diameter of the groove 20 larger than the diameter of the ball head of the spring coil 100. The clamping force of the groove 20 on the ball head disappears, and the spring coil 100 can easily separate from the push rod 1 and remain in the aneurysm, completing the release of the spring coil 100.

[0035] like Figure 3 and Figure 4As shown, the slotted spring piece 2 includes an elastic ball socket 21, the inner cavity of which forms a slot 20, and an elastic lug 22 connected at one end to the elastic ball socket 21, with the other end of the elastic lug 22 abutting against the inner wall of the push rod 1. In this way, the arc-shaped inner cavity of the elastic ball socket 21 has a higher fit with the ball head of the spring coil 100. Combined with the continuous radial pressure of the elastic lug 22, it can form a wrap-around clamping action, which is more secure than the clamping action of the flat slot 20 and can accommodate ball heads with slight size differences, improving adaptability. The elastic expansion process of the elastic lug 22 is gradual and controllable, avoiding the mechanical impact when the rigid structure separates, resulting in less mechanical disturbance when the spring coil 100 is released, further reducing the risk of "kicking the tube".

[0036] In this embodiment, the number of elastic ear pieces 22 is at least two sets, and the elastic ear pieces 22 are evenly distributed around the groove 20.

[0037] It should be noted that the number and relative position of the release grooves 10 are consistent with those of the elastic lugs 22. In this way, multiple sets of elastic lugs 22 expand elastically synchronously, the force is evenly distributed, there are no local stress abrupt changes, and the kicking phenomenon is further reduced.

[0038] like Figure 3 As shown, the elastic ball socket 21 and the elastic ear piece 22 are integrally formed, with the ends of the elastic ear piece 22 flaring outwards. This integral design avoids stress concentration at the joints, resulting in greater durability. The flared ear piece has a wider range of elastic deformation, which improves the degree of deformation during clamping and releasing, enhances the stability of clamping and releasing, and reduces the difficulty of operation.

[0039] like Figure 3 As shown, the elastic earpiece 22 includes a first bent portion 221, a second bent portion 222, and a third bent portion 223, which are integrally formed and connected in sequence. The first bent portion 221 is connected to the elastic ball socket 21, and the bent protrusion of the third bent portion 223 abuts against the inner wall of the push rod 1. In this way, the elastic deformation of the three-section bent structure is controllable. With the circumferential uniform distribution, it can provide a continuous and symmetrical radial clamping force. The elastic recovery process of the bent portion is gradual and the force transmission is smooth, without rigid impact. Compared with the straight earpiece, it further reduces the mechanical disturbance during release and completely avoids the "kicking tube" phenomenon. The integrally formed structure avoids the risk of breakage, and the elastic deformation range of the bent portion is larger, which can withstand repeated push and release operations and has a longer service life.

[0040] like Figure 2 As shown, the push rod 1 includes an inner push rod 11 and an outer push rod 12 that is slidably sleeved on the outside of the inner push rod 11. The release groove 10 is arranged along the circumference of the inner push rod 11, and the inner wall of the outer push rod 12 forms the bottom of the release groove 10.

[0041] Thus, when the outer wall of the slotted spring piece 2 enters the release groove 10 and abuts against the inner wall of the outer push rod 12, the diameter of the slot 20 is larger than the diameter of the ball head of the spring coil 100. When the outer wall of the slotted spring piece 2 abuts against the inner wall of the inner push rod 11, the diameter of the slot 20 is smaller than the diameter of the proximal ball head of the spring coil 100.

[0042] It should be noted that the double-nested inner push rod 11 and outer push rod 12 add a new release method. The through hole position can be moved to the outer wall of the elastic ear piece 22 to achieve release through axial relative movement. The operation stroke is controllable, avoiding the release position deviation that may occur in the single release method of pulling the elastic ear piece 22 by the traction wire 3. It can adapt to the precise release requirements of complex tumors. The outer push rod 12 provides a stable groove bottom for the release groove 10. The double rods support each other, reduce the deformation of the rod body during pushing, ensure smooth force transmission of the elastic piece, and reduce the risk of structural failure.

[0043] In this embodiment, both the slotted spring 2 and the push rod 1 are provided with developing material.

[0044] It should be noted that imaging blocks or imaging particles can be embedded in key positions on the groove spring 2 and the inner wall or distal tube section of the push rod 1, or imaging metal powder material can be incorporated into the groove spring 2 and push rod 1 during the manufacturing process to form a tube section that can cooperate to present imaging. At the same time, there will be a MARK mark at the proximal end of the push rod 1. The doctor can identify the relative displacement when pushing the proximal end, which facilitates intuitive judgment of the pushing distance.

[0045] The advantage of this application lies in the fact that conventional mechanically released spring coils 100 and pushing devices have fixed structures, causing the spring coils 100 to twist during delivery and their tail ends to be fixed in position. This restricts their ability to actively adapt to irregular spaces within the aneurysm, forcing them to passively fill in pre-shaped areas, which can easily lead to embolization dead zones requiring additional force. In contrast, the grooved spring piece 2 of this application uses a wrap-around clamping method to hold the ball head of the spring coil 100. The diameter of the groove 20 of the grooved spring piece 2 is only slightly larger than the diameter of the ball head. This allows the ball head to be released by the deformation of the outer wall of the elastic clamp after falling into the release groove 10. This means that a "ball-head" connection is formed between the ball head and the groove 20, allowing the ball head to rotate and swing within a certain angle range within the groove 20. This gives the spring coil 100 free rotational capability during delivery and filling, meaning that when the spring coil 100 fills the aneurysm space, it can freely twist and actively "find" the space. With ample space within the aneurysm, it possesses enhanced locating capabilities, adapting to the filling needs of irregular aneurysm cavities, achieving more uniform and comprehensive embolization, avoiding incomplete embolization. It eliminates the need for external force compression, significantly reducing pressure on the aneurysm wall, while ensuring tighter packing. This not only guarantees embolization effectiveness but also reduces the risk of rupture from an operational mechanics perspective, greatly improving safety. This application represents a core breakthrough over traditional mechanically detachable coil 100 embolization techniques, overcoming the risks of limited packing, excessive pressure, and aneurysm rupture. It improves embolization accuracy with a freely torsional locating connection method, reduces rupture risk with low-pressure packing, and retains the reliability of mechanical detachment. This is a targeted upgrade to the interventional embolization coil 100 detachment technology.

[0046] Example 2 This embodiment is similar to Embodiment 1, except that: In this embodiment, the diameter of the traction wire 3 is 0.1 mm to 1 mm, and the traction wire 3 is made of high-density polyethylene, nylon, polyether ether ketone (PEEK), poly(p-phenylene terephthalamide) (PPTA), polyimide (PI), polyglycolic acid (PGA), polycaprolactone (PCL), or polylactic acid (PLA).

[0047] In this embodiment, the push rod 1 is made of sodium hypochlorite tube.

[0048] The other structures and principles of this embodiment are the same as those of Embodiment 1.

[0049] Example 3 This application also provides a spring coil system, including a spring coil 100, and a spring coil release structure as described in Embodiment 1 above.

[0050] like Figure 2As shown, the spring coil 100 includes a spring coil body 101, an anti-unspinning cap 102 disposed at one end of the spring coil body 101, a ball head connecting rod 103 disposed at the other end of the spring coil body 101, and an anti-unspinning wire 104 connecting the anti-unspinning cap 102 and the ball head connecting rod 103 respectively; one end of the ball head connecting rod 103 is limited inside the spring coil body 101, and the other end of the ball head connecting rod 103 is a ball head, which is held by the slotted spring piece 2.

[0051] In this way, the ball-head connecting rod 103 of the spring coil 100 is clamped and fixed by the ball head and the slotted spring piece 2 of the release structure. The anti-unspinning wire 104 connects the anti-unspinning end cap 102 and the ball-head connecting rod 103 to prevent the spring coil body 101 from twisting or unspinning during the transportation process, ensuring that it arrives at the cavity in a pre-shaped posture. The flexible cooperation between the ball-head connecting rod 103 and the release structure, combined with the anti-unspinning design, allows the spring coil body 101 to rotate freely to find the cavity without affecting the filling density due to torsional deformation, which is suitable for irregular cavities. The anti-unspinning structure reduces the mechanical internal loss of the spring coil 100 during transportation, and there is no additional torsional impact during release. Combined with the smooth release of the slotted spring piece 2, it provides double protection to avoid "kicking" and damage to the cavity wall.

[0052] In this embodiment, the spring coil 100 is also provided with developing material. The developing material can be provided on the anti-unspinning sealing head 102 and the spring coil body 101, and the implantation of the developing material is similar to the implantation method of the slot spring 2 / push rod 1.

[0053] like Figure 2 and Figure 5 As shown, the application method of the spring coil system in this application is as follows: Step 1: After establishing vascular access, confirm the size of the hemangioma and select a suitable size 100 coil. Step 2: Remove the spring coil 100 and spring coil release mechanism, and check the equipment for damage or kinking; Step 3: Before use, rinse the spring coil 100 and the spring coil release structure with heparinized saline, and immerse the spring coil 100 and the spring coil release structure in heparinized saline. Step 4: Use the infeeding sheath to help the spring coil 100 enter the microcatheter 200; Step 5: Slowly push the spring coil 100 until the push rod 1 enters the microcatheter 200, remove the guide sheath, and continue to push the traction wire 3 into the hemangioma for packing; Step 6: Under the fluoroscopic guidance of DSA, after the spring coil 100 is filled, the imaging point at the distal end of the spring coil 100 coincides with the imaging point at the tip of the microcatheter 200, and release begins at the appropriate position. Step 7: By pulling / pushing the traction wire 3 or moving the inner push rod 11 radially, the outer wall of the slotted spring piece 2 abuts into the release groove 10, thus completing the release; Step 8: After the release is completed, remove push rod 1. During the operation, the doctor determines the number of coils 100 to pack based on the condition of the hemangioma and proceeds with subsequent operations. Step 9: After packing is completed, perform contrast imaging to check the surgical outcome; Step 10: After confirming that everything is correct, remove the instruments and complete the surgical treatment.

[0054] In this embodiment, the spring coil body 101 is made of a single wire material of platinum-tungsten or nickel-titanium alloy, and the diameter of the single wire of the spring coil 100 is 0.001mm to 0.5mm.

[0055] In this embodiment, the anti-unwinding filament 104 is made of high-density polyethylene material, and the diameter of the anti-unwinding filament 104 is 0.01mm to 0.5mm.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A spring ring release structure, characterized by, The spring ring releasing structure comprises a push rod (1), a notch elastic sheet (2) inside the push rod (1), and a traction wire (3) connected to the notch elastic sheet (2); the notch elastic sheet (2) is provided with a notch (20) for clamping a ball head of a spring ring (100), and an outer side wall of the notch elastic sheet (2) abuts against an inner wall of the push rod (1); a distal end of the push rod (1) is provided with a releasing groove (10), when the outer side wall of the notch elastic sheet (2) abuts against a groove bottom of the releasing groove (10), a caliber of the notch (20) is greater than a diameter of the ball head of the spring ring (100), and when the outer side wall of the notch elastic sheet (2) abuts against the inner wall of the push rod (1) outside the releasing groove (10), the caliber of the notch (20) is smaller than the diameter of the ball head of the spring ring (100).

2. The spring ring release structure of claim 1, wherein The notch elastic sheet (2) comprises an elastic ball socket (21), an inner cavity of the elastic ball socket (21) forms the notch (20), and a spring ear (22) is connected to one end of the elastic ball socket (21), and the other end of the spring ear (22) abuts against an inner side wall of the push rod (1).

3. A spring ring release structure according to claim 2, wherein The number of the spring ears (22) is at least two groups, the spring ears (22) are uniformly distributed in a circumferential direction around the notch (20), and the number and relative position of the releasing grooves (10) are consistent with the spring ears (22).

4. The spring ring release structure of claim 2, wherein The elastic ball socket (21) and the spring ear (22) are integrally formed, and the end of the spring ear (22) is outwardly distributed.

5. The spring ring release structure of claim 2, wherein The spring ear (22) comprises a first bending part (221), a second bending part (222) and a third bending part (223) which are integrally formed and sequentially connected, the first bending part (221) is connected to the elastic ball socket (21), and a bending protrusion of the third bending part (223) abuts against the inner side wall of the push rod (1).

6. The spring ring release structure of claim 1 wherein, The push rod (1) comprises an inner layer push rod (11) and an outer layer push rod (12) which is slidably sleeved outside the inner layer push rod (11), the releasing grooves (10) are arranged in a circumferential direction of the inner layer push rod (11), and an inner wall of the outer layer push rod (12) forms a groove bottom of the releasing grooves (10).

7. The spring ring release structure of claim 1 wherein, The diameter of the traction wire (3) is 0.1mm-1mm, and the traction wire (3) is made of high-density polyethylene, nylon, polyether ether ketone, poly-p-phenylene terephthalamide, polyimide, polyglycolic acid, polycaprolactone or polylactic acid material.

8. The spring ring release structure of claim 1 wherein, The push rod (1) is made of a hypotube.

9. A spring system comprising a spring ring (100), characterized in that The spring ring releasing structure is also used in the spring ring releasing structure of any one of claims 1-8. The spring ring releasing structure is also used in the spring ring releasing structure of any one of claims 1-8.

10. A system of spring rings according to claim 9, characterized in that The spring ring (100) comprises a spring ring body (101), an anti-unwinding head (102) arranged at one end of the spring ring body (101), a ball head connecting rod (103) arranged at the other end of the spring ring body (101), and an anti-unwinding wire (104) connected with the anti-unwinding head (102) and the ball head connecting rod (103) respectively; one end of the ball head connecting rod (103) is limited in the spring ring body (101), and the other end of the ball head connecting rod (103) is a ball head, and the slot elastic sheet (2) clamps the ball head.

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