Mechanical release spring system

Abstract

The utility model relates to medical instrument technical field, specifically disclose a kind of mechanical release spring ring system, the spring ring system includes push rod, release assembly and spring plug body;The push rod has hollow cavity from distal end to proximal end through, the release assembly is through the hollow cavity, and its distal end detachably connected in the proximal end of the spring plug body, and the proximal end of the spring plug body is stopped in the distal end of the push rod outside.The mechanical release spring ring system provided by the utility model can avoid the risk of incomplete release and displacement of the spring plug body during the release process, and achieve convenient and efficient release of the spring plug body. The structure is simple, which improves the convenience and stability of operation and has higher safety.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a mechanical release spring coil system. Background Technology

[0002] Coil release is a medical device used to treat aneurysms. It utilizes a delivery system to deliver a spring-loaded embolus to the lesion site. Then, a specific release mechanism detaches the delivery system from the embolus, leaving the embolus embedded at the lesion site to prevent blood flow into the aneurysm and thus prevent rupture. Release methods between the delivery system and the embolus include mechanical release, electrical release, thermal release, and hydraulic release. Mechanical release, which requires no additional current or hydrolytic solvent, is rapid and reliable, and has become the most common release method for current coil products.

[0003] In existing procedures, one method employs a mechanical release mechanism using a snap-lock system. Once the spring embolization is implanted and the catheter is advanced, the connection point between the push rod and the spring embolization is released, freed from the constraints of the outer sheath. However, in practice, multiple spring emboli are often implanted within the aneurysm. As the number of implanted emboli increases, the release space becomes limited, leading to incomplete release and increasing surgical risks. Another method achieves mechanical release by removing the limiting wire. A ball head is placed proximally on the spring embolization, located in an internal groove or limiting hole at the distal end of the push tube. The limiting wire is located inside the push tube and extends beyond its distal end. When the limiting wire is removed, the ball head proximal to the spring embolization can detach from the push tube. However, in practice, when the limiting wire is removed, the ball head on the spring embolization is subjected to force, which may cause displacement of the spring embolization, affecting treatment efficacy and reducing surgical safety. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a mechanical release spring coil system.

[0005] The technical solution adopted in this utility model is:

[0006] The spring coil system includes a push rod, a release assembly, and a spring plug body; the push rod has a hollow cavity extending from the distal end to the proximal end, the release assembly extends through the hollow cavity, and a release hook is provided at the distal end of the release assembly; a release element is provided at the proximal end of the spring plug body, the release element having a release hole perpendicular to the length direction of the release assembly; the release hook passes through the release hole, and the proximal end of the spring plug body abuts against the distal end of the push rod.

[0007] Furthermore, in the aforementioned mechanical release spring coil system, the release assembly includes a release wire, a limiting member, and a release hook connected sequentially from the proximal end to the distal end; the limiting member abuts against the inner wall of the push rod and can slide along the axis of the hollow cavity under the action of the release wire.

[0008] Furthermore, in the aforementioned mechanical release spring coil system, the release wire, the limiting member, and the release hook are integrally formed or connected separately.

[0009] Furthermore, in the aforementioned mechanical release spring coil system, the limiting member is cylindrical, spiral, or wavy.

[0010] Furthermore, in the aforementioned mechanical release spring coil system, the release hook is an elastic element; when the release wire is pulled proximally, the proximity of the spring plug abuts against the distal end of the push rod, and simultaneously, the release hook disengages from the release hole as the state changes, completing the release separation.

[0011] Furthermore, in the aforementioned mechanical release spring coil system, the edge of the release hole is provided with a bevel towards its proximal end.

[0012] Furthermore, in the aforementioned mechanical release spring coil system, the distal end of the push rod extends in the axial direction to form a limiting protrusion, and the proximal end of the spring plug body abuts against the limiting protrusion.

[0013] Furthermore, in the aforementioned mechanical release spring coil system, the limiting protrusion is in the shape of a hollow frustum, and the diameter of its distal end is smaller than the diameter of the spring plug and the push rod.

[0014] Furthermore, in the aforementioned mechanical release spring coil system, the diameter of the release element is smaller than the diameter of the distal end of the limiting protrusion.

[0015] Furthermore, in the aforementioned mechanical release spring coil system, the axial length of the release element is 0.5mm-15mm.

[0016] The beneficial effects of the above technical solution are as follows:

[0017] (1) The mechanical release spring coil system provided by this utility model can avoid the risk of incomplete release and displacement of the spring plug body during the release process, realize the convenient and efficient release of the spring plug body, and has a simple structure, improves the convenience and stability of operation, and has higher safety. Attached Figure Description

[0018] Figure 1 A schematic diagram of the mechanical release spring coil system provided in Embodiment 1 of this utility model;

[0019] Figure 2 A schematic diagram of the mechanical release spring coil system provided in Embodiment 2 of this utility model;

[0020] Figure 3 This is a schematic diagram illustrating the release of the spring plug body in the mechanical release spring coil system provided in Embodiment 2 of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 100-Push rod; 110-Limiting protrusion; 200-Release assembly; 210-Release pull wire; 220-Limiting component; 230-Release hook; 300-Release component; 310-Release hole; 400-Spring plug body. Detailed Implementation

[0022] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this utility model, but should not be used to limit the scope of this utility model. That is, this utility model is not limited to the described preferred embodiments, and the scope of this utility model is defined by the claims.

[0023] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance; those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this specification, the term "proximal" usually refers to the end closer to the operator of the medical device, and "distal" usually refers to the part of the medical device that is farther away from the operator, commonly the end that first enters the body.

[0025] Example 1

[0026] Figure 1 This is a schematic diagram of the mechanical release spring coil system provided in Embodiment 1 of this utility model. The spring coil system includes a push rod 100, a release assembly 200, and a spring plug body 400. The push rod 100 has a hollow cavity extending from its distal end to its proximal end. The release assembly 200 extends through the hollow cavity, and its distal end is detachably connected to the proximal end of the spring plug body 400. The spring plug body is confined outside the distal end of the push rod 100. When the release assembly 200 is pulled proximally, the proximal end of the spring plug body 400 abuts against the distal end of the push rod 100. Further pulling of the release assembly 200 causes its distal end to disengage from the proximal end of the spring plug body 400, completing the release.

[0027] Specifically, a release element 300 is provided at the proximal end of the spring plug body 400, and the release element 300 has a release hole 310 perpendicular to the length direction of the release assembly 200. A release hook 230 is provided at the distal end of the release assembly 200, and the release hook 230 passes through the release hole 310. The release hook 230 is a hook-shaped elastic element, and the end of the elastic element passes through the release hole 310. Its bending angle and stiffness can drive the release element 300 and the spring plug body 400 to move when the release assembly 200 is pulled. The edge of the release hole 310 is provided with a bevel towards its proximal end, so that the release hook 230 can be more easily disengaged from the release hole 310 without causing the spring plug body 400 to move.

[0028] The release assembly 200 includes a release wire 210, a limiting member 220, and a release hook 230 connected sequentially from proximal to distal. The release wire 210 is the end closest to the medical device operator and is the direct operating end. The limiting member 220 abuts against the inner wall of the push rod 100 and can slide along the axis of the hollow cavity within the push rod 100 under the dragging action of the release wire 210. The limiting member 220 can be helical or wavy and has a certain degree of elasticity. Figure 3 As shown, when the release wire 210 is pulled proximally, the proximal end of the spring plug 400 abuts against the distal end of the push rod 100, remaining in place. Simultaneously, the release hook 230 slowly straightens, disengaging from the release hole 310 as the state changes during the pulling process, thus completing the release separation. The release wire 210, the limiting member 220, and the release hook 230 are integrally formed or separately connected. The release assembly 200 is made of one or more materials selected from stainless steel, nickel-titanium alloy, polymer materials, or platinum-tungsten alloy. The axial length of the release member 300 ranges from 0.5mm to 15mm.

[0029] The distal end of the push rod 100 extends into a limiting protrusion 110 along the axial direction, and the proximal end of the spring plug 400 abuts against the limiting protrusion 110. Specifically, the limiting protrusion 110 is a hollow frustum shape, and the diameter of its distal end is smaller than the diameter of the spring plug 400 and the push rod 100. The diameter of the release member 300 is smaller than the diameter of the distal end of the limiting protrusion 110, allowing the release member 300 to extend from the distal end of the limiting protrusion 110 into the push rod 100 and connect with the release assembly 200; or the distal end of the push rod 100 extends out of the distal end of the limiting protrusion 110 and connects with the release member 300, and then the release member 300 and the spring plug 400 are pulled back.

[0030] Example 2

[0031] Figure 2This is a schematic diagram of the mechanical release spring coil system provided in Embodiment 2 of this utility model. Unlike Embodiment 1, the limiting member 220 is cylindrical, and the inner wall of the cylindrical circumferential push rod 100 abuts against it, and can slide along the axis of the hollow cavity inside the push rod 100 under the dragging action of the release wire 210.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A mechanical release spring coil system, characterized in that, The spring coil system includes a push rod, a release assembly, and a spring plug body; the push rod has a hollow cavity extending from the distal end to the proximal end, the release assembly extends through the hollow cavity, and a release hook is provided at the distal end of the release assembly; a release element is provided at the proximal end of the spring plug body, the release element having a release hole perpendicular to the length direction of the release assembly; the release hook passes through the release hole, and the proximal end of the spring plug body abuts against the distal end of the push rod.

2. The mechanical release spring coil system according to claim 1, characterized in that, The release assembly includes a release wire, a limiting member, and a release hook connected sequentially from the proximal end to the distal end; the limiting member abuts against the inner wall of the push rod and can slide along the axis of the hollow cavity under the action of the release wire.

3. The mechanical release spring coil system according to claim 2, characterized in that, The detachable wire, the limiting member, and the detachable hook are integrally formed or connected separately.

4. A mechanical release spring coil system according to claim 2 or 3, characterized in that, The limiting element is cylindrical, spiral, or wavy.

5. A mechanical release spring coil system according to claim 2 or 3, characterized in that, The release hook is an elastic element; when the release wire is pulled towards the proximal end, the proximal end of the spring plug body abuts against the distal end of the push rod, and at the same time, the release hook disengages from the release hole as the state changes, completing the release separation.

6. A mechanical release spring coil system according to any one of claims 1 to 3, characterized in that, The edge of the release hole is provided with a slope towards its proximal end.

7. A mechanical release spring coil system according to any one of claims 1 to 3, characterized in that, The distal end of the push rod extends into a limiting protrusion in the axial direction, and the proximal end of the spring plug body abuts against the limiting protrusion.

8. A mechanical release spring coil system according to claim 7, characterized in that, The limiting protrusion is in the shape of a hollow frustum, and the diameter of its distal end is smaller than the diameter of the spring plug and the push rod.

9. A mechanical release spring coil system according to claim 7, characterized in that, The diameter of the release element is smaller than the diameter of the distal end of the limiting protrusion.

10. A mechanical release spring coil system according to any one of claims 1 to 3, characterized in that, The axial length of the release component is 0.5mm-15mm.

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