Mechanical release mechanism for implant

Abstract

The utility model discloses a mechanical release mechanism for an implant, and relates to the field of medical equipment.The mechanical release mechanism for the implant comprises a pushing rod, the pushing rod is provided with the mechanical release mechanism for the implant, the mechanical release mechanism comprises a developing metal tube fixedly installed at the far end of the pushing rod, and a spring ring is fixedly installed at one end of the developing metal tube; a round head is fixedly installed at one end of the spring ring, a releasing wire is arranged in the pushing rod, and one end of the releasing wire is located in the developing metal pipe. The near end of the implant and the farthest end of the push rod are fixed through a special mechanical structure, when the release wire and the push rod are fixed, the implant is connected with the push rod, and at the moment, the implant and the push rod can move synchronously; when the releasing wire and the far end of the pushing rod are released from fixation, the pushing rod is withdrawn after the releasing wire is pulled towards the near side, at the moment, the implant is released and stays at the original position, releasing of the implant is completed, and accurate, rapid, safe and efficient releasing can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, and particularly to a system and method for delivering an implant into a patient, and more particularly to a mechanical release mechanism for an intracranial coil embolization implant. BACKGROUND

[0002] An intracranial aneurysm is a common cerebrovascular disease, which is usually formed at a weak part of the blood vessel wall and forms an abnormal bulge similar to a tumor under the continuous action of blood flow and blood pressure. Although the intracranial aneurysm is not a real tumor, its harm is very serious, so it is necessary to effectively treat it.

[0003] The treatment methods for intracranial aneurysms mainly include craniotomy clipping and interventional embolization. As a commonly used intracranial aneurysm embolization material, the safety and effectiveness of the coil are widely recognized. Compared with the traditional craniotomy clipping operation, the coil has the advantages of simple operation, small trauma, fast recovery and good effect. Therefore, the treatment method of intracranial aneurysm embolization can fully meet the market demand. At present, the release methods of the coil on the market are divided into four types: electrolytic release, mechanical release, thermal melting release and hydrolysis release.

[0004] Although the electrolytic release has the longest development time, its release time is long, the release efficiency and stability are low, and the ideal release effect cannot be achieved. The thermal melting release melts the release wire by generating heat through electricity, which will produce smoke and cause local damage to the human body. The hydrolysis release releases the coil by injecting a dissolving agent into the delivery catheter, which can easily increase the pressure of the blood vessel and the solvent cannot accurately reach the release area. CONTENT OF THE INVENTION

[0005] In order to realize the functions of pushing, withdrawing and controllable release of the implant in the clinical application process, the present application provides a mechanical release mechanism for an implant.

[0006] The mechanical release mechanism for an implant provided by the present application adopts the following technical scheme: a mechanical release mechanism for an implant, comprising a pushing rod, wherein the pushing rod is provided with a mechanical release mechanism for an implant;

[0007] The mechanical release mechanism comprises a developing metal tube fixedly installed at the distal end of the pushing rod, one end of the developing metal tube is fixedly installed with a coil, one end of the coil is fixedly installed with a round head, the pushing rod is provided with a release wire, one end of the release wire is located in the developing metal tube, the developing metal tube is provided with a ball head matched with one end of the release wire, one end of the ball head is fixedly installed with a hook rod, one end of the hook rod is fixedly installed with a hook ring, and the coil is provided with a clamping part matched with the hook ring.

[0008] By adopting the technical scheme, the proximal end of the implant and the distal end of the push rod are fixed by a special mechanical structure, and when the release wire is fixed with the push rod, the implant is connected with the push rod, at this time, the implant can move synchronously with the push rod; when the release wire is disengaged from the distal end of the push rod, the release wire is pulled proximally, and then the push rod is withdrawn, at this time, the implant is released and remains in the original position, the release of the implant is completed, and precise, rapid, safe and efficient release can be achieved.

[0009] Preferably, the release wire is composed of a spiral part and a connecting part.

[0010] By adopting the technical scheme, the release wire is set to assist in release.

[0011] Preferably, the push rod is provided with a mounting hole, and the connecting part is slidingly mounted in the mounting hole.

[0012] By adopting the technical scheme, the mounting hole is set to assist in installation.

[0013] Preferably, the end of the push rod close to the release wire is the proximal end, and the end away from the release wire is the distal end.

[0014] By adopting the technical scheme, the end of the push rod close to the release wire is the proximal end, and the end away from the release wire is the distal end, so that installation and connection are facilitated.

[0015] Preferably, the inside of the developing metal tube is provided with a circular hole, and the circular hole is provided in a through manner.

[0016] By adopting the technical scheme, the circular hole is set to assist in installation.

[0017] Preferably, the release wire is a platinum-tungsten alloy wire.

[0018] By adopting the technical scheme, the platinum-tungsten alloy wire has excellent high-temperature stability and corrosion resistance, and can maintain stable performance in a high-temperature environment.

[0019] Preferably, the push rod body is a metal tube, and the inner diameter of the developing metal tube is greater than the inner diameter of the push rod body metal tube.

[0020] By adopting the technical scheme, the inner diameter of the developing metal tube is greater than the inner diameter of the push rod body metal tube, so that installation and use are facilitated.

[0021] In summary, the present application has at least one of the following beneficial technical effects:

[0022] 1. The application adopts the cooperation of push rod and other components, the implant is fixed with the distal end of the push rod by special mechanical structure, and the implant is connected with the push rod when the release wire is fixed with the push rod, at this time the implant can move synchronously with the push rod; when the release wire is released from the distal end of the push rod, the release wire is pulled proximally, and then the push rod is withdrawn, at this time the implant is released and stays in the original position, the release of the implant is completed, and precise, rapid, safe and efficient release can be realized.

[0023] 2. The application adopts the cooperation of release wire and other components, the distal end of the release wire is a spiral structure, the number of spiral turns, the diameter of the spiral, the pitch and the diameter and material of the release wire can be adjusted according to the required release force value, in this example, platinum tungsten alloy wire is used as the release wire, and the distal end is wound into a spring shape with a certain pitch. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is a schematic diagram of the overall structure of a mechanical release mechanism for an implant according to an embodiment of the application;

[0025] Fig. 2 It is a schematic diagram of the structure of the release wire component according to an embodiment of the application;

[0026] Fig. 3 It is a schematic diagram of the structure of the mechanical release mechanism before release according to an embodiment of the application;

[0027] Fig. 4 It is a schematic diagram of the structure of the mechanical release mechanism during release according to an embodiment of the application;

[0028] Fig. 5 It is a schematic diagram of the structure of the mechanical release mechanism after release according to an embodiment of the application;

[0029] Reference signs: 1, push rod; 2, developing metal tube; 3, spring ring; 4, round head; 5, release wire; 6, spiral part; 7, ball head; 8, hook rod; 9, hook ring; 10, clamping part; 11, round hole; 12, mounting hole; 13, connecting part. DETAILED DESCRIPTION

[0030] The following will be described in detail with reference to the accompanying drawings Figs. 1-5 The application will be further described in detail.

[0031] The application discloses a mechanical release mechanism for an implant.

[0032] Reference Figs. 1-3 A mechanical release mechanism for an implant, comprising a push rod 1, a mechanical release mechanism for an implant arranged on the push rod 1;

[0033] Wherein, the mechanical release mechanism includes a developing metal tube 2 fixedly installed at the distal end of the push rod 1, a spring ring 3 fixedly installed at one end of the developing metal tube 2, a round head 4 fixedly installed at one end of the spring ring 3, a release wire 5 arranged in the push rod 1, one end of the release wire 5 located in the developing metal tube 2, a ball head 7 arranged in the developing metal tube 2 and matched with one end of the release wire 5, a hook rod 8 fixedly installed at one end of the ball head 7, a hook ring 9 fixedly installed at one end of the hook rod 8, a clamping part 10 arranged in the spring ring 3 and matched with the hook ring 9, and the release wire 5 is composed of a spiral part 6 and a connecting part 13;

[0034] In use, the release wire 5 is inserted into the push rod 1 and extends to the farthest end of the push rod 1, and is detachably fixed at the nearest end of the push rod 1, when the release wire 5 is fixed at the nearest end of the push rod 1, the push rod 1 and the release wire 5 have no relative displacement, when the release wire 5 is released from the push rod 1, the push rod 1 is stationary, at this time the release wire 5 can be pulled to move proximally, the implant is fixed at the farthest end of the push rod 1 by a special mechanical structure, when the release wire 5 is fixed at the push rod 1, the implant is connected with the push rod 1, at this time the implant can move synchronously with the push rod 1, when the release wire 5 is released from the push rod 1, after pulling the release wire 5 proximally, the push rod 1 is withdrawn, at this time the implant is released and remains in the original position, the release of the implant is completed, and precise, rapid, safe and efficient release can be achieved.

[0035] With reference to Figs. 3-5 , the mechanical release mechanism further includes a mounting hole 12 arranged in the push rod 1, the connecting part 13 is slidingly installed in the mounting hole 12, one end of the push rod 1 close to the release wire 5 is the nearest end, one end of the push rod 1 away from the release wire 5 is the distal end, a circular hole 11 arranged in the developing metal tube 2, the circular hole 11 is through, the release wire 5 is a platinum-tungsten alloy wire, and the push rod 1 is a metal tube, the inner diameter of the developing metal tube 2 is larger than the inner diameter of the metal tube of the push rod 1.

[0036] In use, the inner cavity of the developing metal tube 2 is used to accommodate the distal end spiral structure of the release wire 5, by the difference between the diameters of the two tube cavities, the distal end spiral structure of the release wire 5 is unwound during the pulling of the release wire 5;

[0037] The implant example is a spring ring 3 implant, which is composed of a hook ring 9 with a ball head 7 and a spring ring 3 main body. The size of the ball head 7 can enter the spiral inner cavity of the distal end spiral structure of the release wire 5, and the implant is fixedly connected through the mechanical assembly of the push rod 1 and the release wire 5;

[0038] After the implant reaches the intended target, the proximal end of the push rod 1 is released from the fixing of the release wire 5, and then the push rod 1 is kept stationary, and the proximal end of the release wire 5 is pulled slightly, at which time the spiral structure at the distal end of the release wire 5 begins to unwind, and when the spiral structure cannot cover the hook ring 9 of the ball head 7 at the proximal end of the spring ring 3, the push rod 1 is withdrawn, at which time the implant is released and remains in the target position.

[0039] The implementation principle of the mechanical release mechanism for the implant according to the embodiment of the present application is as follows: in use, the release wire 5 is placed into the push rod 1 and extends to the distal end of the push rod 1, and is detachably fixed at the proximal end of the push rod 1, when the release wire 5 is fixed at the proximal end of the push rod 1, the push rod 1 and the release wire 5 have no relative displacement; when the release wire 5 is released from the fixing of the push rod 1, the push rod 1 is kept stationary, at which time the release wire 5 can be pulled to move proximally, the proximal end of the implant is fixed to the distal end of the push rod 1 by a special mechanical structure, and when the release wire 5 is fixed to the push rod 1, the implant is connected to the push rod 1, at which time the implant can move synchronously with the push rod 1; when the release wire 5 is released from the fixing of the push rod 1, the release wire 5 is pulled proximally, and then the push rod 1 is withdrawn, at which time the implant is released and remains in the original position, the release of the implant is completed, and precise, rapid, safe and efficient release can be achieved.

[0040] The distal end of the release wire 5 is a spiral structure, which can be adjusted in terms of the number of spiral turns, the diameter of the wound spiral, the pitch, and the diameter and material of the release wire 5 according to the required release force value, in the present example, a platinum-tungsten alloy wire is used as the release wire 5, and the distal end is wound into a spring shape with a certain pitch, when the release wire 5 is pulled, the spiral structure at the distal end will unwind with the pulling of the release wire 5, and the release of the implant is achieved.

[0041] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made in terms of structure, shape, principle, etc. according to the present application should be covered within the protection scope of the present application.

Claims

1. A mechanical release mechanism for an implant, comprising a push rod (1), characterized in that: The push rod (1) is provided with a mechanical release mechanism for the implant; The mechanical release mechanism comprises a radiopaque metal tube (2) fixedly installed at the distal end of the push rod (1), one end of the radiopaque metal tube (2) is fixedly installed with a spring ring (3), one end of the spring ring (3) is fixedly installed with a round head (4), the push rod (1) is provided with a release wire (5) inside, one end of the release wire (5) is located in the radiopaque metal tube (2), the radiopaque metal tube (2) is provided with a ball head (7) matched with one end of the release wire (5) inside, one end of the ball head (7) is fixedly installed with a hook rod (8), one end of the hook rod (8) is fixedly installed with a hook ring (9), the spring ring (3) is provided with a clamping part (10) matched with the hook ring (9) inside.

2. A mechanical release mechanism for an implant according to claim 1, wherein: The release wire (5) is composed of a spiral part (6) and a connecting part (13).

3. A mechanical release mechanism for an implant according to claim 1, wherein: The push rod (1) is provided with a mounting hole (12) inside, and the connecting part (13) is slidingly installed in the mounting hole (12).

4. A mechanical release mechanism for an implant according to claim 1, wherein: The push rod (1) is provided with a proximal end close to the release wire (5) and a distal end away from the release wire (5).

5. A mechanical release mechanism for an implant according to claim 1, wherein: The radiopaque metal tube (2) is provided with a circular hole (11) inside, and the circular hole (11) is provided in a through manner.

6. A mechanical release mechanism for an implant according to claim 1, wherein: The release wire (5) is a platinum-tungsten alloy wire.

7. A mechanical release mechanism for an implant according to claim 1, wherein: The push rod (1) is a metal tube, and the inner diameter of the radiopaque metal tube (2) is greater than the inner diameter of the metal tube of the push rod (1).

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