Implant and system for interventional occlusion treatment

Abstract

The invention provides an implant and a system for interventional occlusion treatment. The system comprises an implant, a transmission tube, a transmission guide wire, a separation point and a separator. The transmission guide wire pushes the implant to move towards the direction of the target cavity, and the moment when the separator disconnects the separation point of the transmission guide wire and the implant is judged by observing the development mark of the implant. The implant includes an occlusion device body and a coil coil. One end of the spiral spring ring is connected to the near end of the plugging device body, the other end of the spiral spring ring is wound into a disc shape along the radial plane of the plugging device body and abuts against the plugging device body, and the outer diameter B of the spiral spring ring is larger than the outer diameter A of the near end of the plugging device body. When the implant is implanted into the target cavity, the helical spring coil is rewound into a disc shape within the target cavity. The periphery of the spiral spring ring abuts against the inner wall of the cavity to extrude the inner wall of the cavity, and stable mutual supporting is formed. The spiral spring ring generates stable supporting force on the plugging device body, and plugging of the implant in the target cavity is more stable.

Description

[0001] This invention application is a divisional application submitted based on the Chinese patent application with application number 202010636326.9, application date July 3, 2020, and invention name “Implant and system for interventional occlusion treatment”. Technical Field

[0002] The present invention relates to a minimally invasive interventional treatment device, belonging to the technical field of medical devices, and in particular to an implant and a system for interventional occlusion treatment. Background Art

[0003] Take the interventional occlusion method for the treatment of intracranial aneurysms as an example. Intracranial aneurysms refer to the abnormal local expansion of the lumen of cerebral arteries, which causes a tumor-like protrusion of the arterial wall. Due to hemodynamics, the bifurcation of blood vessels is most susceptible to blood flow impact and aneurysm formation. The blood flow continuously generates axial shear stress on the blood vessel wall at the bifurcation. The faster the blood flow, the greater the shear stress on the bifurcation. When the shear stress increases to a certain extent, the intima of the artery is damaged or torn, and an aneurysm is gradually formed.

[0004] After an aneurysm is formed, the blood flow in the artery enters the distal end of the aneurysm when passing through the aneurysm, causing an impact on the distal outer wall of the aneurysm, causing the blood flow rate to slow down. Then, the blood flows along the inner wall of the aneurysm, gradually forming a vortex, and finally the blood flows out through the proximal end of the aneurysm. The aneurysm is constantly impacted by the blood flow. Once the aneurysm is damaged and ruptured, the subarachnoid hemorrhage caused by the rupture is one of the diseases that leads to a high mortality rate.

[0005] In order to reduce the force of blood flow on the aneurysm cavity, the prior art can reinforce the aneurysm by implanting an implant into the aneurysm cavity.

[0006] According to the Chinese patent application number CN201821298904.7, a device for blocking intracranial aneurysms is provided. Figure 1 As shown, the occluding device includes an occluding device body 1, a proximal development mark 11, a distal development mark 12, a transmission guide wire 4, a separation point 5, a transmission tube 3 and a separator 6.

[0007] The main body 1 of the occluding device is woven into a mesh by nickel-titanium memory alloy wires, and the proximal end and the distal end of the main body 1 of the occluding device are respectively bound and fixed by the proximal end development mark 11 and the distal end development mark 12. The main body 1 of the occluding device is gathered in the transmission tube 3. The transmission guide wire 4 is located in the transmission tube 3, and a separation point 5 is provided between the proximal end development mark 11 and the distal end of the transmission guide wire 4, and the proximal end of the transmission guide wire 4 is connected to the separator 6.

[0008] When performing interventional treatment on a patient without craniotomy, the location of the intracranial aneurysm is determined by angiography, the occlusion device is introduced into the blood vessel from the femoral artery or the brachial artery, the transmission tube 3 is pushed to the aneurysm-bearing artery, and the location of the occlusion device body 1 is determined by the imaging mark. When the distal end of the transmission tube 3 passes through the opening of the aneurysm, the transmission guide wire 4 is pushed to release the occlusion device body 1, and the occlusion device body 1 is removed from the transmission tube 3 and expands in the aneurysm cavity due to its own shape memory function.

[0009] However, combined with Figure 1 and Figure 2 After the occlusion device is implanted in the aneurysm at the bifurcation of the blood vessel, blood flows from the main blood vessel into the aneurysm cavity and impacts the occlusion device in the aneurysm cavity. Since the blood flow velocity at the bifurcation is high, the container of the occlusion device collapses, resulting in unstable occlusion. Therefore, after the occlusion device in the prior art is impacted by the blood flow, it is difficult to stably occlude the aneurysm, which is not conducive to the repair of the aneurysm.

[0010] In addition, combined Figure 1 and Figure 3 When the occluding device body 1 is transmitted to the distal inner wall of the aneurysm, the distal imaging marker 12 of the occluding device body 1 contacts the inner wall of the aneurysm before the occluding device body 1. Since the material of the distal imaging marker 12 is relatively hard, it is easy to break through the aneurysm wall. Summary of the invention

[0011] In order to overcome the deficiencies in the prior art, the present invention provides an implant for interventional occlusion therapy, which can stably occlude a target cavity.

[0012] The implant for interventional occlusion treatment provided by the present invention comprises an occlusion device body, the occlusion device body comprises a coaxially arranged proximal development mark and a distal development mark, and a plurality of metal wires connecting the proximal development mark and the distal development mark, wherein the metal wires are made of a shape memory alloy material; and

[0013] The proximal helical spring coil is made of shape memory alloy material, one end of which is connected to the proximal developing mark, and the other end is wound into a disc shape along the radial plane of the occluding device body. The disc-shaped proximal helical spring coil is abutted against the occluding device body, and the outer diameter B of the proximal helical spring coil is larger than the outer diameter A of the proximal end of the occluding device body.

[0014] Because of the shape memory characteristics of the metal wire and the proximal helical spring coil, the metal wire and the proximal helical spring coil can restore the pre-set shape after being delivered into the tumor cavity.

[0015] When the implant is implanted in the target cavity, the proximal coil spring coil can be rewound into a disc shape inside the target cavity by utilizing the shape memory function. Since the outer diameter B of the proximal coil spring coil is larger than the outer diameter A of the proximal end of the occluding device body, the periphery of the disc-shaped proximal coil spring coil abuts against the inner wall of the cavity, squeezing the inner wall of the cavity to form a stable mutual support. Because the proximal coil spring coil abuts against the occluding device body, the proximal coil spring coil generates a stable supporting force on the occluding device body, and compared with the case where only the occluding device body is implanted in the target cavity, the implant is more stably blocked in the target cavity.

[0016] The present invention also provides an implant for interventional occlusion treatment, which can reduce the risk of the inner wall of the cavity being damaged by the implant.

[0017] The implant for interventional occlusion treatment provided by the present invention comprises an occlusion device body, a coaxially arranged proximal development mark and a distal development mark, and a plurality of metal wires connecting the proximal development mark and the distal development mark, wherein the metal wires are made of a shape memory alloy material; and

[0018] The distal helical spring coil is made of a shape memory alloy material, one end of which is connected to the distal development mark, and the other end is wound along the radial plane of the occlusion device body.

[0019] By adopting the above technical solution, during the process of the implant being implanted into the target cavity, the distal coil reaches the distal inner wall of the target cavity before the distal developing mark. Since the distal coil can form surface contact with the wall of the target cavity (for example, the tumor wall) after being wound along the radial plane, and the material of the distal coil is less hard than the material of the distal developing mark, the distal coil causes less damage to the distal inner wall of the target cavity, and interventional occlusion treatment is safer.

[0020] The present invention also provides an implant for interventional occlusion therapy, which can stably occlude a target cavity and reduce the risk of the inner wall of the cavity being damaged by the implant.

[0021] The implant for interventional occlusion treatment provided by the present invention comprises

[0022] The main body of the occlusion device includes a coaxially arranged proximal development mark and a distal development mark, and a plurality of metal wires connecting the proximal development mark and the distal development mark, wherein the metal wires are made of a shape memory alloy material.

[0023] Also includes a spiral spring coil, which is made of a shape memory alloy material. The spiral spring coil includes

[0024] A distal helical spring coil, one end of which is connected to the distal visualization marker and the other end of which is wound along the radial plane of the occlusion device body; and

[0025] The proximal helical spring coil has one end connected to the proximal developing mark and the other end wound into a disc shape along the radial plane of the occluding device body. The disc-shaped proximal helical spring coil abuts against the occluding device body, and the outer diameter B of the proximal helical spring coil is larger than the outer diameter A of the proximal end of the occluding device body.

[0026] By adopting the above technical solution, during the process of the implant being implanted into the target cavity, the distal coil reaches the distal inner wall of the target cavity before the distal developing mark. Since the distal coil can form surface contact with the wall of the target cavity (for example, the tumor wall) after being wound along the radial plane, and the material of the distal coil is less hard than the material of the distal developing mark, the distal coil causes less damage to the distal inner wall of the target cavity, and interventional occlusion treatment is safer.

[0027] By utilizing the shape memory function, the proximal helical spring coil can be rewound into a disc shape inside the target cavity. Since the outer diameter B of the proximal helical spring coil is larger than the outer diameter A of the proximal end of the occluding device body, the periphery of the disc-shaped proximal helical spring coil abuts against the inner wall of the cavity, squeezing the inner wall of the cavity to form a stable mutual support. Because the proximal helical spring coil abuts against the occluding device body, the proximal helical spring coil generates a stable supporting force on the occluding device body, and compared with the case where only the occluding device body is implanted in the target cavity, the implant is more stably blocked in the target cavity.

[0028] A technical solution of the present invention is further configured such that the center portion of the proximal spiral spring coil protrudes in a direction away from the main body of the occluding device.

[0029] The proximal helical spring coil of the above structure can partially weaken the impact force of blood flow and maintain structural stability, thereby preventing the central part of the proximal helical spring coil from collapsing into the target cavity under the action of the impact force of blood flow.

[0030] A technical solution of the present invention is further configured such that the metal coverage of the proximal helical spring coil is greater than the metal coverage of the main body of the occluding device.

[0031] This structure can increase the metal coverage of the proximal end of the implant, slow down the blood flow rate, and make the target cavity easier to occlude.

[0032] A technical solution of the present invention is further configured as follows: the spiral spring coil comprises

[0033] Spring coils; and

[0034] A thin filament extending through the spring coil.

[0035] By adopting the above technical solution, since the filament extends through the spring coil to form a spiral spring coil, compared with the case of only having a spring coil or a filament, the metal coverage of the spiral spring coil is increased, which can slow down the blood flow rate and make the target cavity easier to occlude.

[0036] In addition, in the arrangement of the spiral spring coil of the above structure, the filaments are coiled and abut against the inner wall of the spring coil, which limits the position of the spring coil. The shape of the spiral spring coil is easier to determine than when there is only a spring coil.

[0037] A technical solution of the present invention is further configured such that the main body of the occluding device protrudes toward the proximal developing mark at the junction of the proximal developing mark and the main body of the occluding device.

[0038] This structure makes it easier for the proximal surface of the main body of the occluding device to be retracted within the proximal development mark.

[0039] A technical solution of the present invention is further configured such that the outer diameter A of the proximal end of the main body of the occluding device is less than 0.8 mm.

[0040] By adopting the above technical solution, the main body of the occluding device can be more easily implanted into the target cavity.

[0041] The present invention also provides a system having an implant for interventional occlusion treatment.

[0042] A technical solution of the present invention is further configured to include

[0043] Transmission pipe;

[0044] a delivery guidewire extending through the delivery tube;

[0045] a separation point disposed between the distal end of the delivery guidewire and the proximal end of the proximal helical coil; and

[0046] A separator to disconnect the separation point;

[0047] The proximal end of the transmission guide wire is connected to the separator, and the proximal end of the proximal spiral spring coil is provided with a development mark.

[0048] Through the setting of the above system structure, the transmission tube is inserted into the blood vessel connected to the target cavity. Since the transmission guide wire extends through the transmission tube, the transmission guide wire can transmit the implant connected to it into the target cavity along the transmission tube. Since the proximal spiral spring coil has shape memory, it can be gathered in the transmission tube. Since the proximal spiral spring coil is connected to the distal end of the transmission guide wire, when the transmission guide wire moves in the direction of the target cavity, the proximal spiral spring coil is pushed to move in the direction of the target cavity. Since the proximal end of the proximal spiral spring coil is provided with a developing mark, by observing the position of the developing mark, the moment when the separator disconnects the separation point can be judged. Due to the setting of the separation point position, the transmission guide wire and the proximal spiral spring coil are separated. After the implant connected to the proximal spiral spring coil is implanted into the target cavity along with the proximal spiral spring coil, the implant can restore the pre-set shape due to shape memory, thereby achieving a more stable blocking function.

[0049] In addition, when the implant includes a distal helical spring coil, the above-mentioned system structure setting can simultaneously achieve the functions of reducing damage to the inner wall of the target cavity and improving the safety of interventional occlusion treatment.

[0050] The present invention also provides a system having an implant for interventional occlusion treatment.

[0051] A technical solution of the present invention is further configured to include

[0052] Transmission pipe;

[0053] a delivery guidewire extending through the delivery tube;

[0054] a separation point disposed between the distal and proximal visualization markers of the delivery guidewire; and

[0055] A separator to disconnect the separation point;

[0056] The proximal end of the delivery guidewire is connected to the separator.

[0057] Since the distal helical spring coil has shape memory, it can be gathered in the transmission tube. Since the proximal development marker is connected to the distal end of the transmission guidewire, when the transmission guidewire moves toward the target cavity, the implant is pushed toward the target cavity. By observing the position of the proximal development marker, the moment when the separator disconnects the separation point can be determined. Due to the setting of the separation point position, the transmission guidewire and the proximal development marker are separated, and the implant is sent into the target cavity. The setting of the implant structure and the material of the distal development marker reduces the damage to the inner wall of the target cavity and improves the safety of interventional occlusion treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a schematic diagram of the overall structure of the prior art plugging device of the present invention;

[0059] Figure 2 is a schematic diagram of a prior art occlusion device of the present invention occluding the interior of a bifurcated aneurysm;

[0060] Figure 3 is a schematic diagram of the prior art of the present invention in which the distal imaging marker contacts the inner wall of the tumor;

[0061] Figure 4 is a schematic diagram of the overall structure of a system for interventional occlusion treatment according to a fourth embodiment of the present invention;

[0062] Figure 5 is a schematic structural diagram of an implant for occluding a bifurcated aneurysm according to a first embodiment of the present invention;

[0063] Figure 6 is a schematic structural diagram of a first embodiment of the present invention in which the central portion of the proximal helical spring coil protrudes in a direction away from the main body of the occlusion device;

[0064] Figure 7 It is a front view of the occlusion device body of the first embodiment of the present invention, where the proximal end development mark and the proximal end development mark are connected and protrude toward the proximal end development mark;

[0065] Figure 8 is a top view of the occlusion device body of the first embodiment of the present invention, where the proximal end development mark and the proximal end development mark are combined and protrude toward the proximal end development mark;

[0066] Fig. 9 It is an axonometric view of the occlusion device body of the first embodiment of the present invention, where the proximal end development mark and the proximal end development mark are connected and protrude toward the proximal end development mark;

[0067] Fig.10 is a schematic structural diagram of an implant for occluding an aneurysm according to a second embodiment of the present invention;

[0068] Fig.11 Schematic diagram of the structure of an implant for occluding an aneurysm according to the third embodiment of the present invention.

[0069] Description of Reference Numerals

[0070] 1- occlusion device body; 11- proximal imaging mark; 12- distal imaging mark;

[0071] 2-helical spring coil; 21-proximal helical spring coil; 22-distal helical spring coil;

[0072] 3-Transmission pipe;

[0073] 4-Transmission guidewire;

[0074] 5- separation point;

[0075] 6-Separator. DETAILED DESCRIPTION

[0076] The preferred technical solutions of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these technical solutions are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0077] It should be noted that, in the description of the preferred embodiments of the present invention, the terms "upper", "lower", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0078] In the description of the preferred embodiment of the present invention, the "distal end" refers to the end far away from the operator during the operation, and the "proximal end" refers to the end close to the operator during the operation.

[0079] The present invention is described by taking the interventional occlusion method for treating intracranial aneurysm as an example.

[0080] First embodiment

[0081] This embodiment can solve the problem that bifurcated aneurysms are difficult to be stably blocked by the blocking device body 1. The embodiment provides an implant for interventional blocking treatment, including a blocking device body 1 and a spiral spring coil 2.

[0082] Among them, Figure 4 As shown, the main body 1 of the occluding device includes a proximal development mark 11, a distal development mark 12 and a plurality of metal wires.

[0083] The proximal development mark 11 and the distal development mark 12 are coaxially arranged, and a plurality of metal wires made of shape memory alloy material connect the proximal development mark 11 and the distal development mark 12 .

[0084] In this embodiment, the present invention is described by taking the blocking device body 1 as a cylinder and the metal wire as a nickel-titanium memory alloy wire as an example.

[0085] The main body 1 of the blocking device is woven into a mesh shape by 72 strands of nickel-titanium memory alloy wires. The main body 1 of the blocking device is in a "cylindrical" shape, and the upper and lower surfaces are respectively in a "conical" shape.

[0086] The spiral spring coil 2 is also made of shape memory alloy material.

[0087] Specifically, combined Figure 4 and Figure 5One end of the spiral spring coil 2 is connected to the proximal development mark 11, and the other end is wound into a disc shape along the radial plane of the occluding device body 1. The disc-shaped spiral spring coil 2 is in contact with the occluding device body 1, and the outer diameter B of the spiral spring coil 2 is greater than the outer diameter A of the occluding device body 1.

[0088] Because of the shape memory properties of the metal wire and the spiral spring coil 2, the occlusion device body 1 and the spiral spring coil 2 can restore the pre-set shape after being sent into the tumor cavity. Specifically, the occlusion device body 1 can restore to a cylindrical shape in the tumor cavity, and the spiral spring coil 2 can be re-wound into a disc shape in the tumor cavity.

[0089] After the implant is delivered into the tumor cavity, the cylindrical occlusion device body 1 is squeezed and deformed by the inner wall of the tumor cavity and abuts against the inner wall of the tumor cavity. Since the outer diameter B of the spiral spring coil 2 is larger than the outer diameter A of the occlusion device body 1, the periphery of the disc-shaped spiral spring coil 2 abuts against the inner wall of the cavity, squeezing the inner wall of the cavity to form a stable mutual support. Because the spiral spring coil 2 abuts against the occlusion device body 1, the spiral spring coil 2 generates a stable supporting force on the occlusion device body 1. Compared with the case where only the occlusion device body 1 is implanted into the tumor cavity, the implant is more stably blocked in the tumor cavity.

[0090] In this embodiment, the helical spring coil 2 is a proximal helical spring coil 21 .

[0091] Preferably, if Figure 6 As shown, the center of the proximal coil spring 21 bulges away from the occlusion device body 1. This structure can partially weaken the blood flow impact force and maintain the structural stability of the implant, preventing the center of the proximal coil spring 21 from collapsing into the target cavity under the action of the blood flow impact force.

[0092] Moreover, the design of the above structure allows the implant to fill the space in the aneurysm cavity as much as possible, thereby reducing the recurrence rate of aneurysms.

[0093] Preferably, the metal coverage of the proximal helical spring coil 21 is greater than the metal coverage of the occluding device body 1, thereby increasing the metal coverage of the proximal end of the implant, slowing down the blood flow rate, and making it easier to occlude the target cavity.

[0094] After the blood flow into the aneurysm cavity slows down, it flows through the occlusion device body 1 and the flow rate slows down a second time, which greatly reduces the pressure on the aneurysm caused by the impact of the blood flow.

[0095] Specifically, the proximal helical spring coil 21 includes a spring coil and a filament extending through the spring coil. Compared with the case of only a spring coil or a filament, the metal coverage of the proximal helical spring coil 21 is increased. In addition, in the above-mentioned configuration of the proximal helical spring coil 21, the filament is coiled and abuts against the inner wall of the spring coil, limiting the position of the spring coil, and the shape of the proximal helical spring coil 21 is easier to shape than when there is only a spring coil.

[0096] More preferably, combined with Figure 7 , Figure 8 and Fig. 9 At the connection between the occluding device body 1 and the proximal development mark 11 , the occluding device body 1 protrudes toward the proximal development mark 11 , and the proximal surface of the occluding device body 1 is more easily converged within the proximal development mark 11 .

[0097] Preferably, the outer diameter A of the occluding device body 1 is less than 0.8 mm, so that the occluding device body 1 is easier to be implanted into the target cavity.

[0098] Second embodiment

[0099] The present invention also provides an implant for interventional occlusion therapy, which can reduce the risk of the inner wall of the cavity being damaged by the implant. The difference from the first embodiment is the difference in the connection position and connection relationship between the spiral spring coil 2 and the occlusion device body 1. In this embodiment, in order to distinguish it from the first embodiment, the spiral spring coil 2 is a distal spiral spring coil 22.

[0100] In this embodiment, if Fig.10 As shown, one end of the distal spiral spring coil 22 is connected to the distal development mark 12, and the other end is wound along the radial plane of the occlusion device body 1.

[0101] During the process of implanting the implant into the tumor cavity, the distal coil spring coil 22 reaches the distal inner wall of the tumor cavity before the distal developing mark 12. Since the distal coil spring coil 22 can form surface contact with the tumor wall after being wound along the radial plane, and the material of the distal coil spring coil 22 is less hard than the material of the distal developing mark 12, the distal coil spring coil 22 causes less damage to the distal inner wall of the tumor cavity, and interventional occlusion treatment is safer.

[0102] Third embodiment

[0103] This embodiment combines the first embodiment and the second embodiment. Fig.11 As shown, the proximal development mark 11 of the occluding device body 1 is connected to the proximal coil spring coil 21 , and the distal development mark 12 of the occluding device body 1 is connected to the distal coil spring coil 22 .

[0104] Accordingly, the effect of the implant is combined with the technical effects that are compatible with the first embodiment and the second embodiment. It can reduce the possibility of the distal developing mark 12 causing damage to the distal inner wall of the tumor cavity during the implantation process through the setting of the distal coil spring coil 22, thereby improving the safety of interventional occlusion treatment, and can also make the occlusion of the tumor cavity more stable through the setting of the proximal coil spring coil 21 to stably support the main body 1 of the occlusion device.

[0105] Fourth embodiment

[0106] This embodiment has an implant for interventional occlusion therapy according to any of the above embodiments, and provides a system for interventional occlusion therapy, such as Figure 4 As shown, the system further includes a transmission tube 3 , a transmission guide wire 4 , a separation point 5 and a separator 6 .

[0107] The purpose of setting the separation point 5 is to separate the implant from the transmission guide wire 4. Without affecting this purpose, the position of the separation point 5 is not limited.

[0108] In this embodiment, the helical spring coil 2 is described by taking the proximal helical spring coil 21 as an example.

[0109] The transmission guide wire 4 extends through the transmission tube 3 , the separation point 5 is arranged between the distal end of the transmission guide wire 4 and the proximal end of the proximal spiral spring coil 21 , and the separator 6 is used to disconnect the separation point 5 .

[0110] Combination Figure 4 and Fig.11 When the helical spring coil 2 of the implant includes a proximal helical spring coil 21 and a distal helical spring coil 22, the setting of the separation point 5 is consistent with the above.

[0111] The proximal end of the transmission guide wire 4 is connected to the separator 6, and the proximal end of the proximal spiral spring coil 21 is provided with a development mark.

[0112] The transmission tube 3 is introduced into the tumor-bearing artery. Since the transmission guide wire 4 extends through the transmission tube 3, the transmission guide wire 4 can transmit the implant connected thereto into the tumor cavity along the transmission tube 3. The proximal helical spring coil 21 is gathered in the transmission tube 3. Since the proximal helical spring coil 21 is connected to the distal end of the transmission guide wire 4, when the transmission guide wire 4 moves toward the direction of the tumor cavity, the proximal helical spring coil 21 is pushed to move toward the direction of the tumor cavity. Since a developing mark is provided at the proximal end of the proximal helical spring coil 21, the moment when the separator 6 disconnects the separation point 5 can be determined by observing the position of the developing mark. Due to the setting of the position of the separation point 5, the transmission guide wire 4 and the proximal helical spring coil 21 are separated. After the implant connected to the proximal helical spring coil 21 is implanted into the tumor cavity along with the proximal helical spring coil 21, the implant can restore the pre-set shape due to shape memory, thereby achieving a more stable occlusion function.

[0113] When the implant includes the distal helical spring coil 22, the arrangement of the system structure can also simultaneously achieve the function of reducing the damage to the inner wall of the tumor cavity and improving the safety of interventional occlusion treatment.

[0114] Fifth embodiment

[0115] The present embodiment is different from the fourth embodiment in that the position of the separation point 5 is different.

[0116] Specifically, combined Figure 1 and Fig.10 When the helical spring coil 2 of the implant is only the distal helical spring coil 22 , the separation point 5 is set between the proximal development mark 11 and the distal end of the transmission guide wire 4 .

[0117] The configuration of the system structure can reduce damage to the inner wall of the tumor cavity and improve the safety of interventional occlusion treatment.

[0118] So far, the technical solutions of the present invention have been described in conjunction with the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific technical solutions. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An implant for interventional occlusion therapy, comprising The main body of the occlusion device includes a coaxially arranged proximal development mark and a distal development mark, and a plurality of metal wires connecting the proximal development mark and the distal development mark, wherein the metal wires are made of a shape memory alloy material. It is characterized in that Also includes The distal helical spring coil is made of a shape memory alloy material, one end of which is connected to the distal development mark, and the other end is wound along the radial plane of the occluding device body.

2. The implant for interventional occlusion therapy according to claim 1, characterized in that: The distal helical coil comprises Spring coils; and A filament extends through the spring coil.

3. The implant for interventional occlusion therapy according to claim 1 or 2, characterized in that: The main body of the occluding device protrudes toward the proximal end developing mark at the junction of the proximal end developing mark and the main body of the occluding device.

4. The implant for interventional occlusion therapy according to claim 1 or 2, characterized in that: The outer diameter A of the proximal end of the main body of the occluding device is less than 0.8 mm.

5. A system for interventional occlusion treatment, comprising the implant for interventional occlusion treatment according to any one of claims 1 to 4.

6. The system for interventional occlusion therapy according to claim 5, characterized in that: Also includes Transmission pipe; a delivery guidewire extending through the delivery tube; A separation point is disposed between the distal end of the transmission guide wire and the proximal development marker; and A separator for disconnecting the separation point; The proximal end of the transmission guidewire is connected to the separator.

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