Implantable medical devices

Abstract

The present invention provides an implantable medical device, comprising a spring coil structure and a connecting structure, wherein the connecting structure comprises an anti-unraveling wire, a soft wire, a first connecting member housed inside the proximal end of the spring coil structure, and a second connecting member disposed outside the proximal end of the spring coil structure, wherein one end of the anti-unraveling wire is connected to the distal end of the spring coil structure, and the other end of the anti-unraveling wire is connected to the first connecting member, one end of the soft wire is connected to the first connecting member and the other end is connected to the second connecting member, and the length of the soft wire extending into the spring coil structure varies with the length of the spring coil structure. When the spring coil structure of the present invention is released into a hemangioma, the soft wire is pulled into the spring coil structure, and the length of the soft wire extending into the spring coil structure varies with the length of the spring coil structure, thereby compensating for the length of the anti-unraveling wire, placing the anti-unraveling wire and the spring coil structure in a relaxed state, ensuring the flexibility of the spring coil structure, and preventing the hard spring coil structure from bursting the hemangioma.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an implantable medical device. Background Art

[0002] With the improvement of people's living standards and changes in dietary structure, the incidence of various diseases has gradually increased, including hemangiomas. Hemangiomas are tumor-like protrusions on blood vessels, which can occur on arteries, such as aneurysms. Hemangiomas can have more serious consequences. For example, when the blood pressure in the blood vessels suddenly rises, the aneurysm may rupture and bleed, causing disability or death to the patient. Existing treatment methods mainly include surgical aneurysm clipping and endovascular interventional therapy. With the development of imaging technology and intravascular materials, endovascular interventional therapy has lower risks and less trauma than surgical treatment. It has replaced surgical aneurysm clipping and become the preferred method for treating aneurysms, especially intracranial aneurysms.

[0003] Existing intravascular interventional treatment methods involve implanting a coil structure within the hemangioma. Because the coil occupies a certain amount of space within the hemangioma and stimulates thrombosis within the tumor, it acts to occlude and block the hemangioma. This prevents blood from entering the hemangioma, preventing the blood from impacting the hemangioma and rupturing it, resulting in a good therapeutic effect. The existing coil structure includes a coil, a guidewire, and a delivery tube. The coil is equipped with an anti-disintegration wire. The guidewire passes through the lumen of the delivery tube, with the proximal end of the guidewire connected to the proximal end of the delivery tube, and the distal end of the guidewire is bonded to the coil and anti-disintegration wire. During interventional surgical treatment, after the spring coil is released in the hemangioma, the guide wire between the spring coil and the push tube is melted to separate the spring coil from the push tube. This has the following disadvantages: since the length of the anti-unraveling wire is fixed, after the spring coil is implanted in the hemangioma and released, the anti-unraveling wire will coil along the curved inner wire of the spring coil, forming a "straightening phenomenon". At this time, the anti-unraveling wire is in a tight state, and the softness of the spring coil is lost, resulting in a larger and harder tension of the spring coil, which leads to the occurrence of the tube kicking phenomenon. Moreover, the tight spring coil can easily rupture the blood vessel, threatening the patient's life safety. Summary of the Invention

[0004] In order to overcome the above technical problems, the present invention provides an implantable medical device that prevents a spring coil from being too hard during release and causing a hemangioma to burst.

[0005] As conceived above, the technical solution adopted by the present invention is: an implantable medical device, including a spring coil structure and a connecting structure, the connecting structure including an anti-unraveling wire, a soft wire, a first connecting piece accommodated inside the proximal end of the spring coil structure, and a second connecting piece arranged outside the proximal end of the spring coil structure, one end of the anti-unraveling wire is connected to the distal end of the spring coil structure, the other end of the anti-unraveling wire is connected to the first connecting piece, one end of the soft wire is connected to the first connecting piece and the other end is connected to the second connecting piece, and the length of the soft wire extending into the spring coil structure changes with the change of the length of the spring coil structure.

[0006] Preferably, the spring coil structure includes a spring coil and a card frame arranged at the proximal end of the spring coil, the first end of the card frame is provided with an opening, the soft wire passes through the opening, and the first connecting member and the second connecting member are located on both sides of the opening.

[0007] Preferably, the first connecting member is a ring; and / or the second connecting member is a ball.

[0008] Preferably, the first connecting member, the flexible wire and the second connecting member are integrally formed.

[0009] Preferably, the diameter of the flexible wire is smaller than the diameter of the opening.

[0010] Preferably, the diameter of the first connecting member is larger than the diameter of the opening, and the diameter of the second connecting member is larger than the diameter of the opening.

[0011] Preferably, the connection structure further comprises a hot melt block formed at one end of the anti-unraveling line by hot melting, and the hot melt block is fixed to the distal end of the spring coil.

[0012] Preferably, the implantable medical device further comprises a conveying structure connected to the spring coil structure, and the conveying structure comprises a clamping claw for clamping the second connecting member.

[0013] Preferably, the conveying structure further includes a pushing rod, and the pushing rod is connected to the clamping claw.

[0014] Preferably, the conveying structure further includes a pushing tube, the pushing rod and the clamping claw are accommodated in the pushing tube, the clamping frame is truncated cone-shaped, the clamping frame abuts against the distal end of the pushing tube and the first end of the clamping frame is accommodated in the pushing tube.

[0015] The present invention has at least the following beneficial effects:

[0016] After the implantable medical device of the present invention is implanted in a hemangioma, when the spring coil structure is released in the hemangioma, the soft wire is pulled into the spring coil structure, and the length of the soft wire changes with the change of the length of the spring coil structure, thereby compensating for the length of the anti-unraveling wire, so that the anti-unraveling wire is in a relaxed state in the spring coil structure, and then the spring coil structure is in a relaxed state, ensuring the softness of the spring coil structure, avoiding the hard spring coil structure from bursting the hemangioma, and increasing the safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial structural schematic diagram of the implantable medical device provided by the present invention;

[0018] Figure 2 This is a partial structural diagram of the implantable medical device provided by the present invention in a tense state;

[0019] Figure 3 This is a schematic diagram of a portion of the structure of the implantable medical device provided by the present invention after implantation;

[0020] Figure 4 is a partial schematic diagram of the connection structure of the implantable medical device provided by the present invention;

[0021] Figure 5 is a three-dimensional diagram of a card frame of an implantable medical device provided by the present invention;

[0022] Figure 6 is a schematic structural diagram of the implantable medical device provided by the present invention;

[0023] Figure 7 is a schematic diagram of a delivery structure of an implantable medical device provided by the present invention;

[0024] Figure 8 yes Figure 7 Schematic diagram of the push rod and clamping claws of the delivery structure before implantation;

[0025] Figure 9 yes Figure 7 Schematic diagram of the push rod and clamping claw of the delivery structure after implantation;

[0026] Figure 10 This is a schematic diagram of the structure of the implantable medical device provided by the present invention before implantation into a hemangioma;

[0027] Figure 11 This is a schematic diagram of the structure of the implantable medical device provided by the present invention when implanted into a hemangioma;

[0028] Figure 12 This is a schematic diagram of the structure of the implantable medical device provided by the present invention after being implanted into a hemangioma.

[0029] Description of the accompanying drawings: 1-spring coil structure; 11-spring coil; 111-distal end; 112-proximal end; 12-card frame; 121-first end; 122-second end; 123-opening; 2-connecting structure; 21-first connecting member; 22-soft line; 23-second connecting member; 24-anti-unraveling line; 25-hot melt block; 3-delivery structure; 31-pushing tube; 32-pushing rod; 33-clamping claw; 331-clamping member; 3311-abutting part; 4-blood vessel; 41-hemangioma; 5-microcatheter. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the implantable medical device provided by the present invention in conjunction with the accompanying drawings. It can be understood that the described embodiments are only some embodiments of the present invention, not all embodiments, and the present invention can be implemented in many other ways different from those described herein.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention.

[0032] It should be noted that all directional indications in the embodiments of this specification are only used to explain the relative position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout this specification, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0034] The technical solutions of the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] In this specification, axial refers to the direction parallel to the line connecting the distal center and the proximal center of the component; radial refers to the direction perpendicular to the above axial direction; circumferential refers to the intersection line of a plane perpendicular to the axial direction and the outer surface of the instrument.

[0036] like Figures 1 to 12 As shown, the following will clearly and completely describe the implantable medical device of the present invention:

[0037] In one embodiment, the implantable medical device of the present invention includes a spring coil structure 1 and a connecting structure 2 , wherein the spring coil structure 1 is connected to the connecting structure 2 .

[0038] Preferably, the spring coil structure 1 is used to fill the hemangioma 41. Specifically, the spring coil structure 1 is in a straight state before it is extended into the hemangioma 41. After it fills the hemangioma 41, the spring coil structure 1 can be released to fill part or all of the space inside the hemangioma 41, thereby stimulating the formation of thrombus in the tumor to occlude and block the hemangioma 41. In this way, it is more difficult for the blood in the blood vessel 4 to enter the hemangioma 41, preventing the blood from impacting the hemangioma 41 and bursting it, thereby achieving a good therapeutic effect.

[0039] More preferably, one end of the connecting structure 2 is connected to the spring coil structure 1, and the other end is connected to the delivery structure 3, thereby connecting the spring coil structure 1 and the delivery structure 3, thereby delivering the spring coil structure 1 into the hemangioma 41 through the delivery structure 3. The connecting structure 2 allows the spring coil structure 1 to remain relaxed and soft when released within the hemangioma 41, preventing the hard coil structure 1 from bursting the hemangioma 41, thereby increasing the safety of the surgery.

[0040] In one embodiment, the connecting structure 2 includes an anti-unraveling line 24, a soft line 22, a first connecting member 21 housed inside the proximal end of the spring coil structure 1, and a second connecting member 23 arranged outside the proximal end of the spring coil structure 1. One end of the anti-unraveling line 24 is connected to the distal end 111 of the spring coil structure 1, and the other end of the anti-unraveling line 24 is connected to the first connecting member 21. One end of the soft line 22 is connected to the first connecting member 21 and the other end is connected to the second connecting member 23. The length of the soft line 22 extending into the spring coil structure 1 changes with the change in the length of the spring coil structure 1, that is, when the length of the spring coil structure 1 becomes longer, the length of the soft line 22 extending into the spring coil structure 1 will also become longer. It should be noted that before release, the length of the spring coil structure 1 is the length in a straight state; after release, the length of the spring coil structure 1 is the length of the outside after bending.

[0041] Preferably, the anti-unraveling wire 24 is located inside the spring coil structure 1, and the diameter of the anti-unraveling wire 24 is 0.02 mm to 0.05 mm, that is, the diameter of the anti-unraveling wire 24 can be any value between 0.02 mm and 0.05 mm, and the user can select and set it as needed, without specific limitation here. Furthermore, the material of the anti-unraveling wire 24 is preferably a polymer insulating material such as PP (polypropylene) and PE (polyethylene), and the user can select and set it as needed, without specific limitation here.

[0042] More preferably, one end of the anti-unraveling wire 24 is connected to the distal end 111 of the spring coil structure 1 , such as by hot-melt fixation, and the other end of the anti-unraveling wire 24 is connected to the first connector 21 .

[0043] like Figure 1 As shown, before implantation into the hemangioma 41 , the spring coil structure 1 is preferably in a straight line, and the length of the anti-disintegration line 24 is substantially consistent with the length of the spring coil 11 of the spring coil structure 1 .

[0044] like Figure 2 As shown, as the spring coil structure 1 is filled in the hemangioma 41, the spring coil loop is formed in the hemangioma 41, and the spring ring spacing on the outside of the spring coil structure 1 will change. The smaller the spring coil loop diameter, the larger the spring ring spacing, resulting in a longer length of the outside of the spring coil structure 1, while the length of the anti-unraveling line 24 remains unchanged. The anti-unraveling line 24 is gradually consumed as the spring coil loop bends, and the primary ring spacing at the proximal end of the subsequent spring coil structure 1 is shortened to 0. If this section of the anti-unraveling line 24 is coiled on the inside of the spring coil loop, it means that the anti-unraveling line 24 is in a taut state at this time, and the flexibility of this section of the spring coil structure 1 is lost, forming a "straightening" phenomenon. At this time, the spring coil structure 1 is relatively hard, and there is a risk of tube kicking.

[0045] like Figure 3 As shown, since the soft wire 22 has a certain length, the soft wire 22 can be pulled into the spring coil structure 1 as the spring coil structure 1 becomes longer, thereby compensating for the length of the anti-unraveling wire 24 that is gradually consumed as the length of the spring coil structure 1 changes, so that the anti-unraveling wire 24 is coiled on the outside of the spring coil loop, and the anti-unraveling wire 24 is in a wavy and relaxed state. The spring coil structure 1 in this section is softer, thereby reducing the risk of tube kicking and increasing surgical safety.

[0046] More preferably, the first connector 21 is used to connect the anti-unraveling wire 24 and the flexible wire 22. The first connector 21 is located inside the proximal end of the spring coil structure 1 and opposite the distal end 111 of the spring coil structure 1. Furthermore, the first connector 21 is preferably made of a polymer insulating material such as PP (polypropylene) or PE (polyethylene). The user can select and set it according to their needs, and no specific limitation is given here.

[0047] Further preferably, the flexible wire 22 is flexible and preferably made of a polymer insulating material such as PP (polypropylene) or PE (polyethylene). The user can select and configure it as needed, and no specific restrictions are set here. The provision of the flexible wire 22 allows the spring coil structure 1 to compensate for the length consumed by the anti-unraveling wire 24 when released, thereby making the spring coil structure 1 softer, reducing the force transmitted to the delivery structure 3, reducing the risk of the delivery structure 3 kicking the tube, and increasing surgical safety.

[0048] Furthermore, the second connecting member 23 is provided outside the spring coil structure 1 and is located outside the proximal end of the spring coil structure 1. The second connecting member 23 is preferably made of a polymer insulating material such as PP (polypropylene) or PE (polyethylene). The user can select and set it according to needs, and no specific limitation is made here.

[0049] It should be noted that the proximal end of the spring coil structure 1 is the end close to the operator, and the distal end of the spring coil structure 1 is the end away from the operator.

[0050] Furthermore, one end of the soft wire 22 extends into the spring coil structure 1 and is connected to the first connecting piece 21, and the other end of the soft wire 22 is outside the spring coil structure 1 and is connected to the second connecting piece 23, so that the length of the soft wire 22 extending into the spring coil structure 1 changes with the change of the length of the spring coil structure 1, that is: when the spring coil structure 1 is released, the length of the spring coil structure 1 becomes longer, and the soft wire 22 extends into the interior of the spring coil structure 1 and can change with the change of the length of the spring coil structure 1, so that the spring coil structure 1 remains relaxed and soft, which can avoid the kicking tube phenomenon and improve the safety of the operation.

[0051] In one embodiment, the spring coil structure 1 includes a spring coil 11 and a clamping frame 12 arranged at the proximal end 112 of the spring coil 11. The first end 121 of the clamping frame 12 is provided with an opening 123, and the flexible wire 22 passes through the opening 123. The first connecting member 21 and the second connecting member 23 are located on both sides of the opening 123.

[0052] Preferably, the spring coil 11 is an annular platinum-tungsten alloy spring coil, and the diameter of the spring coil 11 is any value between 0.25 mm and 0.38 mm, and the wire diameter is any value between 0.03 mm and 0.08 mm. The user can select and set it as needed, and no specific limitation is given here. Furthermore, the anti-unraveling wire 24 is located within the spring coil 11.

[0053] It should be noted that the spring coil 11 includes a distal end 111 away from the conveying structure 3 and a proximal end 112 close to the conveying structure 3 .

[0054] More preferably, the card frame 12 is hollow and truncated. The card frame 12 is fixed to the proximal end 112 of the spring coil 11, for example, by welding the card frame 12 to the proximal end 112 of the spring coil 11. The specific method of fixed connection can be selected and set as needed and is not specifically limited here. The card frame 12 includes a first end 121 proximal to the conveying structure 3 and a second end 122 distal from the conveying structure 3. The diameter of the second end 122 of the card frame 12 is the same as the diameter of the spring coil 11. For example, the diameter of the second end 122 of the card frame 12 ranges from 0.25 mm to 0.38 mm, thereby facilitating welding and fixing the second end 122 of the card frame 12 to the proximal end 112 of the spring coil 11.

[0055] More preferably, the card frame 12 is made of alloy materials such as platinum tungsten, platinum iridium, etc., and can be developed under digital silhouette angiography (DSA) to facilitate inspection and position identification. A truncated cone-shaped inner cavity is provided in the card frame 12, and the inner cavity of the card frame 12 is connected to the internal space of the spring coil 11.

[0056] Further preferably, the opening 123 is provided at the first end 121 of the card frame 12 and communicates with the interior of the card frame 12 , so as to facilitate the flexible wire 22 to pass through the opening 123 and extend into the card frame 12 or the spring coil 11 .

[0057] Furthermore, the first connecting member 21 is inside the card frame 12 or the spring coil 11, and the second connecting member 23 is outside the card frame 12, so that the first connecting member 21 and the second connecting member 23 are on both sides of the opening 123 and are connected by a soft wire 22, and the spring coil 11 is connected to the conveying structure 3 through the second connecting member 23.

[0058] In one embodiment, the first connecting member 21 is a ring; and / or the second connecting member 22 is a ball.

[0059] Preferably, the first connecting member 21 is annular, and the outer ring diameter of the first connecting member 21 is any value between 0.08 mm and 0.12 mm, while the inner ring diameter of the first connecting member 21 is any value between 0.03 mm and 0.06 mm. The user can select and set the diameter as needed, and no specific limitation is given here. Furthermore, the circular ring configuration facilitates connection with the anti-disintegration line 24.

[0060] More preferably, the second connecting member 23 is a ball, and the diameter of the ball is any value between 0.08 mm and 0.12 mm, which can be selected by the user according to the needs and is not specifically limited here. Further, the setting of the ball facilitates the connection with the conveying structure 3.

[0061] In one embodiment, the first connecting member 21 , the flexible wire 22 and the second connecting member 23 are integrally formed.

[0062] Preferably, the first connecting member 21 , the flexible wire 22 and the second connecting member 23 are integrally injection molded, which not only simplifies the molding process but also improves the connection strength of the three to meet the requirements of tightening the spring coil 11 and releasing the spring coil 11 .

[0063] In one embodiment, the diameter of the flexible wire 22 is smaller than the diameter of the opening 123 .

[0064] Preferably, the diameter of the soft wire 22 is any value between 0.04 mm and 0.08 mm, such as 0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, etc. The user can choose and set it according to needs, and no specific limitation is made here.

[0065] More preferably, the diameter of the opening 123 is any value between 0.06 mm and 0.1 mm, such as 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, etc. The user can choose to set it according to needs, and no specific limitation is made here.

[0066] More preferably, the diameter of the soft wire 22 is smaller than the diameter of the opening 123, so that the soft wire 22 can smoothly pass through the opening 123 and can move freely back and forth in the card frame 12 or the spring coil 11, thereby achieving compensation against the unraveling of the wire 24 when the spring coil 11 is released.

[0067] In one embodiment, the diameter of the first connecting member 21 is greater than the diameter of the opening 123 , and the diameter of the second connecting member 23 is greater than the diameter of the opening 123 .

[0068] Preferably, when the first connecting member 21 is a ring, the outer diameter of the first connecting member 21 is larger than the diameter of the opening 123 , thereby preventing the first connecting member 21 from passing through the opening 123 , so that the first connecting member 21 remains in the card frame 12 or the spring ring 11 .

[0069] More preferably, when the second connecting member 23 is a ball, the diameter of the second connecting member 23 is larger than the diameter of the opening 123, thereby preventing the second connecting member 23 from passing through the opening 123 into the card frame 12 or the spring coil 11, so that the second connecting member 23 remains outside the card frame 12, preventing the spring coil 1 from untwisting.

[0070] In one embodiment, the connection structure 2 further includes a hot melt block 25 formed at one end of the anti-unraveling line 24 by hot melting, and the hot melt block 25 is fixed to the distal end 111 of the spring coil 11 .

[0071] Preferably, the hot melt block 25 is formed at the distal end of the anti-unraveling line 24 by hot melting, so as to achieve a fixed connection between the hot melt block 25 and the anti-unraveling line 24 .

[0072] More preferably, the hot melt block 25 is fixedly connected to the distal end 111 of the spring coil 11, thereby preventing the hot melt block 25 from being pulled into the spring coil 11 by the anti-unraveling line 24, so that the anti-unraveling line 25 is fixedly connected to the distal end 111 of the spring coil 11 through the hot melt block 25.

[0073] In one embodiment, the implantable medical device further includes a conveying structure 3 , which is connected to the spring coil structure 1 . The conveying structure 3 includes a clamping claw 33 for clamping the second connecting member 23 .

[0074] Preferably, the clamping jaws 33 are made of materials such as platinum-tungsten alloy, nickel-titanium alloy, etc., so that they can be visualized under digital silhouette angiography (DSA) to facilitate inspection and position identification, thereby improving convenience of use.

[0075] More preferably, the clamping jaw 33 includes at least two clamping members 331 disposed opposite to each other, and the clamping members 331 are bent, and the thickness of the clamping members 331 is any value between 0.04 mm and 0.08 mm, and the area is 0.1 mm. 2 to 0.2mm 2 The user can select any value between , and the specific value is not limited here.

[0076] More preferably, before loading, Figure 9 As shown, the clamping members 331 of the clamping jaws 33 are in an open state, and the clamping members 331 are away from each other, which makes it convenient to extend the second connecting member 23 into the clamping jaws 33. Figure 8 As shown, the clamping member 331 of the clamping jaw 33 is in a pressed gripping state, so that the clamping member 331 clamps the second connecting member 23 to prevent the second connecting member 23 from being separated from the clamping jaw 33. At this time, the conveying structure 3 is kept relatively fixed with the connecting member 2 and the spring coil structure 1. After the spring coil 11 moves to the internal space of the hemangioma 41, the spring coil 11 needs to be released, and then the clamping members 331 of the clamping jaw 33 are moved away from each other to open, as shown in FIG. Figure 9 As shown, at this time, the second connecting member 23 is separated from the clamping jaw 33, so that the spring coil structure 1 and the connecting structure 2 are separated from the conveying structure 3, and the clamping jaw 33 is moved out of the inner cavity of the hemangioma 41.

[0077] In one embodiment, the conveying structure 3 further includes a pushing rod 32 , and the pushing rod 32 is connected to the clamping claw 33 .

[0078] Preferably, the push rod 32 is cylindrical, and the diameter of the push rod 32 is any value between 0.1 mm and 0.12 mm. The user can select a specific value as needed, and no specific limitation is made here. Furthermore, the push rod 32 is made of a material such as stainless steel, and the user can select and set it as needed, and no specific limitation is made here.

[0079] More preferably, the distal end of the pushing rod 32 is connected to the clamping claw 33 , so that the clamping claw 33 can be pushed into the hemangioma 41 by the pushing rod 32 , thereby pushing the spring coil 11 into the hemangioma 41 .

[0080] In one embodiment, the conveying structure 3 further includes a pushing tube 31 , and the pushing rod 32 and the clamping claw 33 are accommodated in the pushing tube 31 .

[0081] Preferably, the push tube 31 is hollow cylindrical and axially connected at both ends. The outer diameter of the push tube 31 is any value between 0.32 mm and 0.4 mm, and the wall thickness of the push tube 31 is any value between 0.05 mm and 0.08 mm. The user can select and set it according to needs and no specific restrictions are set here.

[0082] More preferably, the push rod 32 and the clamping claw 33 can be accommodated in the push tube 31, and the clamping member 331 includes a bent portion 3311. When the clamping claw 33 is outside the push tube 31, the clamping members 331 are away from each other and are in an open state. Figure 9 As shown, when the clamping claw 33 is inside the pushing tube 31, the bent portion 3311 abuts against the inner wall of the pushing tube 31, and the clamping members 331 are close to each other to be in a pressing and gripping state, so that the second connecting member 23 is clamped in the middle and will not be separated. Figure 7 and Figure 8 shown.

[0083] In one embodiment, the clamping frame 12 is in a truncated cone shape. The clamping frame 12 abuts against the distal end of the pushing tube 31 , and the first end 121 of the clamping frame 12 is received in the pushing tube 31 .

[0084] Preferably, the diameter of the first end 121 of the card frame 12 is any value between 0.07 mm and 0.11 mm, and the distance between the first end 121 and the second end 122 of the card frame 12 is any value between 0.2 mm and 0.4 mm, so that the card frame 12 is truncated. The beneficial effect of this shape design is that when the release shape of the spring coil 11 is unsatisfactory, the position shape of the spring coil 11 and the push tube 31 is at any angle, and the first end 121 of the card frame 12 can be smoothly pulled into the distal end of the push tube 31, thereby facilitating the recovery of the spring coil structure 1 and improving the convenience and safety of surgical operations. Figure 6 shown.

[0085] When the implantable medical device of the present invention is in use, a spring coil structure 1 of appropriate size and length is first selected according to the size and spatial dimensions of the hemangioma 41, and then a channel leading to the interior of the hemangioma 41 is established in the blood vessel 4 through the microcatheter 5. The implantable medical device of the present invention is then transported through the interior of the microcatheter 5. After the distal end 111 of the spring coil 11 is transported to the distal outlet of the microcatheter 5, the clamp 33 is first pushed toward the direction of the hemangioma 41 to approach the first connecting piece 21. At this time, the soft wire 22 is between the clamp 33 and the first connecting piece 21 and is in a relaxed state. Then, the pushing tube 31 is moved toward the direction of the hemangioma 41 to finally release the spring coil 11. During the process of releasing the spring coil 11, the distance between the inner and outer rings of the spring coil 11 in the inner cavity of the hemangioma 41 becomes larger and the overall length of the outer side becomes longer. The anti-unraveling line 24 is gradually consumed as the length of the outer side of the spring coil 11 becomes longer, and the soft line 22 is pulled into the spring coil 11, thereby freely compensating for the length gap of the anti-unraveling line 24 as the spring coil 11 becomes longer, so that the anti-unraveling line 24 is in a relaxed state, thereby making the spring coil 11 soft, reducing the risk of kicking the tube, preventing the hard spring coil 11 from breaking the hemangioma 41, and increasing the safety of the operation. After the spring coil 11 is released and the shape is satisfactory, the release process begins. At this time, the spring coil 11 is connected to the push tube 31 through the soft wire 22, and then the push rod 32 is moved toward the hemangioma 41, so that the clamping jaw 33 moves out of the push tube 31. At this time, the clamping jaw 33 changes from a clamping state to an open state, so that the second connecting member 23 is disengaged from the clamping jaw 33, and then the connecting structure 2 is separated from the conveying structure 3. The soft wire 33 can reduce the reaction force transmitted from the spring coil 11 to the push tube 31 during the release process, reduce the risk of the push tube 31 kicking the tube, and increase the safety of the operation.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An implantable medical device, characterized in that: The invention comprises a spring coil structure (1) and a connecting structure (2), wherein the connecting structure (2) comprises an anti-unraveling line (24), a soft line (22), a first connecting member (21) accommodated in the proximal end of the spring coil structure (1), and a second connecting member (23) arranged outside the proximal end of the spring coil structure (1), one end of the anti-unraveling line (24) is connected to the distal end (111) of the spring coil structure, the other end of the anti-unraveling line (24) is connected to the first connecting member (21), one end of the soft line (22) is connected to the first connecting member (21) and the other end is connected to the second connecting member (23), and the length of the soft line (22) extending into the spring coil structure (1) changes as the length of the spring coil structure (1) changes.

2. The implantable medical device according to claim 1, wherein: The spring coil structure (1) comprises a spring coil (11) and a clamping frame (12) arranged at the proximal end (112) of the spring coil, wherein a first end (121) of the clamping frame (12) is provided with an opening (123), the flexible wire (22) passes through the opening (123), and the first connecting member (21) and the second connecting member (23) are located on both sides of the opening (123).

3. The implantable medical device according to claim 2, characterized in that The first connecting member (21) is a ring; and / or the second connecting member (23) is a ball.

4. The implantable medical device according to claim 3, wherein: The first connecting member (21), the soft wire (22) and the second connecting member (23) are integrally formed.

5. The implantable medical device according to claim 4, characterized in that The diameter of the flexible wire (22) is smaller than the diameter of the opening (123).

6. The implantable medical device according to claim 5, characterized in that The diameter of the first connecting member (21) is greater than the diameter of the opening (123), and the diameter of the second connecting member (23) is greater than the diameter of the opening (123).

7. The implantable medical device according to claim 6, characterized in that The connection structure (2) further includes a hot melt block (25) formed at one end of the anti-disintegration line (24) by hot melting, and the hot melt block (25) is fixed to the distal end (111) of the spring coil (11).

8. The implantable medical device according to any one of claims 2 to 7, characterized in that: The implantable medical device further comprises a conveying structure (3), wherein the conveying structure (3) is connected to the spring coil structure (1), and the conveying structure (3) comprises a clamping claw (33) for clamping the second connecting member (23).

9. The implantable medical device according to claim 8, characterized in that The conveying structure (3) further comprises a pushing rod (32), wherein the pushing rod (32) is connected to the clamping claw (33).

10. The implantable medical device according to claim 9, characterized in that The conveying structure (3) further comprises a pushing tube (31), the pushing rod (32) and the clamping claw (33) are accommodated in the pushing tube (31), the clamping frame (12) is in a truncated cone shape, the clamping frame (12) abuts against the distal end of the pushing tube (31), and the first end (121) of the clamping frame (12) is accommodated in the pushing tube (31).

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