A retrievable intraluminal implantable device and its application

Abstract

The present invention relates to a retrievable intraluminal implant device, comprising a deformation memory body having two free ends constructed along the length direction of a single rod, wherein the deformation memory body comprises at least two support frames having a closed structure constructed by the rod between the two free ends, and the closed surface formed by closing the support frames is substantially perpendicular to the length direction of the rod. Since the implant device is wound with a rod, the support frame can be opened by pulling the two free ends in the opposite direction to release the closed structure, thereby completing the recovery.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and relates to a recyclable intraluminal implant device and its application, and in particular to a recyclable medical device for treating hypertension and its application. Background Art

[0002] Research is ongoing on the treatment of hypertension based on baroreceptor reflex activation therapy. Baroreceptors are abundant pressure-sensitive nerve endings under the adventitia of the carotid sinus and aortic arch blood vessel walls. Arterial baroreceptors do not directly sense changes in blood pressure, but rather sense the degree of mechanical stretch of the blood vessel wall. When arterial blood pressure rises, the degree of stretching of the arterial wall increases, and the number of nerve impulses released by the baroreceptors increases, thereby lowering blood pressure. Studies have shown that within a certain range, the frequency of incoming impulses to the baroreceptors is proportional to the degree of expansion of the arterial wall, and the degree of mechanical stretch of the blood vessel wall sensed by the baroreceptors is proportional to the radius of curvature of the blood vessel. The following literature is available for reference: Su Dingfeng. Arterial baroreflex and cardiovascular disease [M]. / / Su Dingfeng, Miao Chaoyu, eds. Cardiovascular Pharmacology. 2nd edition, Beijing: Science Press, 2010: 101-109. "Carotid sinus nerve occlusion after carotid endarterectomy reduces blood pressure instability: a systematic review and subsequent analysis", Tang T.Y., Eur J Vas Surg. 2007 Sep; 34(3): 304-11; "Baroreceptor-mediated changes in coronary artery pressure: a preliminary study in awake and anesthetized sheep =“On the stress mechanism of carotid baroreceptors”, Bennetts J.S., Physiol Pharmacol Clin Exp. 2001 Sep;28(9):768-72; “On the stress mechanism of carotid baroreceptors”, Landgren S., Acta Physiologica Scandinavica. 1952 Jul 17;26(1):1-34; “Effects of changes in mean pressure, pulsatile pressure and pulsatile frequency on the stimulatory activity in baroreceptor fibers from the aortic arch and right subclavian artery of the rabbit”, Angell James JE, J Physiol. 1971 Apr;214(1):65-88.

[0003] AngioDynamics of the United States has developed a device based on the principle of pressure-sensitive reflex activation therapy, MobiusHD, which is a new type of mechanical device that can be implanted in blood vessels, reshape the carotid sinus and amplify pressure-sensitive signals. It is made of self-expanding nickel-titanium material and placed in the appropriate position of the internal carotid artery through a standard percutaneous catheter. The intermittent geometric changes of the venous sinus are passively activated, thereby increasing the stretch of the pulsating wall. Currently, there are three main specifications: 5.0-7.0mm, 6.25-9.00mm and 8.00-11.75mm, and it is still in the clinical stage.

[0004] However, this type of device still has shortcomings. The long-term presence of metal stents in blood vessels has a certain impact on the endothelial remodeling of the blood vessel wall and the normal contraction and relaxation of the blood vessels. In particular, when restenosis occurs in the original stent-placed blood vessel, it is difficult to deploy a new stent inside the original metal stent, which adds obstacles to secondary treatment. Therefore, when the blood vessel function is improved or repaired, the existence of vascular stents in the body has no meaning.

[0005] Liu Jianfeng, Hou Kai, Li Hui and others conducted a study on "Clinical treatment of internal carotid artery stenosis with carotid angioplasty and stent placement" and believed that after carotid angioplasty and stent placement, the intracranial artery is in a state of long-term low perfusion, there is insufficient compensation, and the vascular self-regulation function is impaired, which will lead to a high probability of complicated hyperperfusion syndrome. Therefore, the recovery of intravascular stents is an urgent problem to be solved.

[0006] Chinese patent CN106063735 discloses an artificial vascular stent and its conveyor, including a bare stent at the head end, a coated body, a tightening wire, and a conveying wire; wherein one end of the tightening wire is connected to the rear end of the coated body; and the other end of the tightening wire is connected to the conveying wire. The conveyor includes: a guide head, a core tube, a main sheath tube, and an outer tube. The tightening wire is connected to the conveying wire, and the conveying wire is connected to the conveyor. The purpose of the vascular stent recovery is secondary positioning and release, and it is not suitable for the recovery of the vascular stent after several months.

[0007] Therefore, it is necessary to develop a device for treating hypertension with new structure and performance. Summary of the invention

[0008] The purpose of the present invention is to provide a retrievable intraluminal implant device that can solve the problems of the prior art treatment of hypertension devices, such as poor blood pressure lowering effect, inability to be stably fixed in the carotid artery, displacement or flipping due to blood pressure shock and difficulty in recovery.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0010] Provided is a retrievable intraluminal implantable device, comprising a deformation memory body having two free ends constructed along the length direction of a single rod, at least two openable support frames having a closed structure formed by bending the rod between the free ends, wherein the closed surface formed by closing the support frames is substantially perpendicular to the length direction of the rod;

[0011] The closed structure of the support frame can be opened by pulling the two free ends in opposite directions, and the deformation memory body tends to maintain the closed shape of the support frame in an unconstrained state.

[0012] In the description of the present invention, it should be noted that the "deformation memory body with two free ends constructed along the length direction of a single rod" does not limit the manufacturing method of the present device. The manufacturing method of the present device can be that the deformation memory structure is obtained by laser cutting of a tubular material or by bending a single rod to obtain the deformation memory structure. It can also be in the form of other conventional processes that are not mentioned in the present invention but are well known to those skilled in the art. The deformation memory structure finally obtained is a structure that can be flattened into a single straight rod along the length direction under ideal conditions. This ideal condition can obviously be imagined, and the deformation memory structure is not required to have such ideal deformation ability.

[0013] In the description of the present invention, it is also necessary to explain that the "deformation memory body" in the present invention refers to a structure with the ability of elastic deformation, that is, a structure that can be deformed when an external force is applied, and can recover or tend to recover its original shape when the external force is removed. For example, conventional stents implanted in blood vessels are all deformation memory bodies. This elastic deformation ability can be obtained by selecting a deformation memory material and by thermal processing, which belongs to the conventional technology in the field.

[0014] In the implant device embodiment of the present invention, the support frame can be a rectangular structure, a triangular structure, an elliptical structure or other polygonal structures.

[0015] The two support frames may be of the same or different sizes.

[0016] In the present invention, the supporting frame is preferably a rectangular structure, and there are two supporting frames.

[0017] As another implementation, those skilled in the art may set the number of the support frames to 3 or more as needed.

[0018] In the implant device embodiment of the present invention, the portion of the rod between the two support frames is the middle section, and the middle section is located at the outermost peripheral surface of the closed surface of the two support frames. That is, the middle section will not protrude from both sides of the outermost peripheral edges of the closed surface of the two support frames along the radial direction of the closed surface. This structure enables the middle section to fit with the inner wall of the blood vessel when implanted in the blood vessel, and plays the function of stabilizing the shape memory body and fixing the relative positions of the two support frames, especially without affecting the normal blood flow in the blood vessel.

[0019] The middle section may be a straight rod structure and perpendicular to the closed surfaces of the two support frames. However, the middle section may be a non-closed arc structure.

[0020] In the implantation device embodiment of the present invention, the free end may be provided with a spherical head, which may have a larger diameter so as to be easily captured and bound by the binding unit. The free end may also be provided with a developing mark for easy positioning.

[0021] In one embodiment of the implant device of the present invention, the closing structure is a combination of protrusions and grooves arranged on two spatially adjacent parts of the rod, wherein the protrusion can be inserted into the groove to achieve the closure of the support frame, and the protrusion can be pulled out of the groove to open the closed support frame.

[0022] In another embodiment of the implantable device of the present invention, the closed structure is a combination of mutually attractive magnetic parts respectively arranged on two spatially adjacent parts of the rod. In a preferred embodiment, the magnetic part is a magnetic ring embedded in the rod body.

[0023] The combination of the above two closed structures can be applied selectively or simultaneously. Obviously, it is a preferred embodiment to arrange a magnetic member combination near the protrusion and groove combination.

[0024] The present invention also provides a further improved embodiment of the aforementioned implant device, further comprising a pull wire, the pull wire being fixed to one of the components of the closed structure, and the pull wire being used to pull the two matching components of the closed structure closer together. One end of the pull wire can be fixed to one of the components of the closed structure, and the other end can be directly extended out of the body along the path constructed by the interventional procedure, or the other end does not directly extend out of the body but is passed into the implantation position of the implant device through another traction mechanism, and the free end of the pull wire is pulled by the traction mechanism so that the two matching components are pulled closer together or directly closed.

[0025] Preferably, the pull wire is an absorbable wire.

[0026] The present invention also provides the use of the above implant device as a medical device for treating hypertension.

[0027] The present invention also provides the use of the aforementioned implant device as a carotid sinus implant medical device

[0028] In summary, the present invention has the following advantages compared to the prior art:

[0029] a) This device is provided with a closed structure at the bend between the support bracket and the intermediate connector. After the product is released, the protrusion structure calibration position is adjusted by pulling the wire to form a closed support structure, which can increase the radius of curvature of the blood vessel to the greatest extent.

[0030] b) The straight rod at the front and rear ends of the device is designed to be 90 degrees to the support surface, so that the support surface is close to the radial surface of the blood vessel, which has a significant effect on changing the radius of curvature of the blood vessel.

[0031] c) The rounded head design at the beginning and end of the device not only facilitates the use of a clamp or a capture ring to clamp the round head and temporarily remove it through minimally invasive surgery, but also prevents the device from puncturing the inner wall tissue due to slight deviation caused by the impact of blood flow.

[0032] d) The device adopts a cylindrical structure design, which has good wall compliance and can easily shape the blood vessel wall into a desired shape without easily breaking the blood vessel wall or causing stress concentration to damage the blood vessel wall.

[0033] e) The device has good biocompatibility. Since it is wound with a rod, it can be stretched into a straight line or tending to a straight line when a certain force is applied, so it is easy to retract it into the sheath and the retraction is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the structure of the implantation device embodiment 1 of the present invention;

[0036] Figure 2 This is an enlarged schematic diagram of the upper closed structure in Example 1 of the implant device of the present invention.

[0037] Figure 3 It is an enlarged schematic diagram of the lower closed structure in Embodiment 1 of the implant device of the present invention;

[0038] Figure 4 This is a schematic structural diagram of Embodiment 4 of the implant device of the present invention;

[0039] Figure 5 This is a schematic structural diagram of Embodiment 5 of the implant device of the present invention;

[0040] Figure 6 It is a cross-sectional schematic diagram of the device of the present invention implanted in the lumen of a blood vessel;

[0041] Figure 7 This is a schematic diagram of the change in blood vessel diameter before and after the device embodiment of the present invention is implanted into the blood vessel;

[0042] Figure 8 This is a schematic diagram of an embodiment of the implantable device of the present invention in a catheter / retrieved state.

[0043] In each figure, the figure marks are explained as follows:

[0044] Figure 1 : free end 1, rectangular support frame 2, upper closed structure 3, middle section 4, lower closed structure 5;

[0045] Figure 2 : protrusion 3-1, groove 3-2, pull line 3-3;

[0046] Figure 3 : Groove 5-1, protrusion 5-2, pull wire 5-3;

[0047] Figure 4: free end 7, triangular support frame 8, upper closed structure 9, middle section 10, lower closed structure 11;

[0048] Figure 5 : free end 12, elliptical support frame 13, upper closed structure 14, middle section 15, lower closed structure 16; DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the drawings and specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0050] Embodiment 1:

[0051] See also Figure 1 , which shows a retrievable intraluminal implant device, which includes a shape memory body consisting of two free ends, two rectangular support frames 2, an upper closing structure 3, a middle section 4, and a lower closing structure 5.

[0052] The rectangular support frame 2 is used to change the curvature radius of the blood vessel. One end of the support frame is connected to the free end, and the other end is connected to the middle section 4 , that is, the two support frames 2 are connected through the middle section 4 .

[0053] Among them, the free end and the middle section 4 can be basically in a straight line to ensure the stability of the supporting frame structure. An upper closing structure 3 and a lower closing structure 5 are provided on the rectangular supporting frame structure 2. The opening or closing of the rectangular supporting frame 2 is achieved by operating the closing structures 3 and 5.

[0054] The protrusions and grooves are arranged at the connection between the free end and the support frame or at the connection between the support frame and the middle section. Due to the shape memory of the deformation memory material product itself, after the above-mentioned device is implanted in the lumen, the above-mentioned protrusions and grooves can cooperate with each other to form a closed frame structure.

[0055] The shape memory body can be unfolded by pulling the two free ends in opposite directions, and the upper closed structure 3 and the lower closed structure 5 of the two rectangular support frames 2 are opened at the same time. The unfolded shape memory body can be approximately linear, for example, see Figure 8 The expanded shape memory body can also be in the form of a rod with a wave shape.

[0056] The shape memory body can be taken out of a large lumen by being expanded to have a reduced outer diameter. Figure 8The expanded shape memory body can be placed in a delivery catheter with a smaller diameter, and thus delivered to the vicinity of the position to be implanted in the human body. By withdrawing the catheter without withdrawing the shape memory body, the expanded shape memory body can be released from the catheter and deform spontaneously, and tend to recover to its set memory shape, for example Figure 1 The two rectangular support frames 2 are respectively closed by the upper closing structure 3 and the lower closing structure 5, each forming a closed surface, thereby forming a stable circumferential support structure in close contact with the inner wall of the blood vessel. The diagonal length of the closed rectangular frame is greater than the diameter of the blood vessel at the implanted site. It is desirable that the closed surface is perpendicular to the axial direction of the blood vessel at the implanted site, because this will effectively change the curvature radius of the blood vessel. Figure 8 , shows the effect of changing the curvature radius of the blood vessel after the implant device is implanted into the blood vessel, the blood vessel radius is plastically changed from R1 to R2, R2>R1. The middle section 4 and the two free ends respectively play a role in orientation and limitation for the two closed rectangular support frames 2. Therefore, it is preferred that the closed surface formed when the support frame 2 is closed is substantially perpendicular to the length direction of the middle section, but a smaller angle is also acceptable.

[0057] The two rectangular support frames 2 of the implant device can be of the same size, for example Figure 1 as shown, but may also be different, for example Figure 6 Those skilled in the art can make a selection based on the anatomical and physiological morphology of the blood vessel.

[0058] The implant device can be implanted in the patient's blood vessel for a period of time, such as a few hours, a few days or a few months, and a longer period of time may also be permitted to reduce the patient's blood pressure. In some cases, the implant device may be removed from the patient's body. Figure 1 When the implanted device is removed from the blood vessel into which it is implanted and recovered, a delivery or recovery channel from the outside of the body to the location of the implanted device can be established through the delivery catheter, and a restraining mechanism for recovery can be introduced into the channel. The restraining mechanism is used to restrain a free end of the implanted device close to the channel, and a pulling force is applied outside the body to pull the implanted device to unfold, thereby shortening its radial length along the blood vessel. The implanted device is retrieved and pulled into the delivery catheter while being unfolded, and can finally be withdrawn from the patient's body together with the delivery catheter.

[0059] The restraining mechanism may adopt conventional technical means in the art, for example, it may be a guide wire, at the end of which is provided with a restraining unit such as a ring, hook, or clip, and the restraining unit may capture the free end of the implanted device adjacent thereto.

[0060] The free end of this embodiment may be provided with a spherical round head, which may have a larger diameter, so that it is easy to be captured and bound by the binding unit. The spherical round head can also prevent the free end from causing damage to the inner wall of the blood vessel and reduce the recovery resistance of the free end entering the recovery catheter. For example, it can prevent the instrument from puncturing the inner wall tissue due to slight deviation due to the pulsation of the blood vessel or the impact of blood flow.

[0061] Based on this embodiment, a further improvement can be proposed. The free end can be provided with a head to match with the restraining unit to facilitate the transportation and recovery of the device.

[0062] In addition, a developing mark can be provided on the free end to facilitate positioning.

[0063] The closed structure of the implant device of this embodiment adopts a combination of protrusions and grooves, such as Figure 2 , 3 As shown, the upper closed structure 3 is provided with a protrusion 3-1 and a groove 3-2, and the lower closed structure 5 is provided with a groove 5-1 and a protrusion 5-2. The protrusion and the groove have matching sizes and shapes, so that the protrusion can be firmly inserted into the groove, which plays a shaping and stabilizing role in the formed closed rectangular support frame structure, thereby preventing the rectangular support frame from being opened unexpectedly.

[0064] The free end and the middle section of the present embodiment are both in the form of straight rods. However, they can also be arranged in a curved form, such as an arc shape, as required.

[0065] The middle section of this embodiment is located on the surface where the outermost periphery of the closed surface of the two support frames is located. The surface where the outermost periphery of the closed surface of the two support frames is located can be understood as the side surface of the cylinder with the two rectangular closed surfaces as the top and bottom surfaces. Figure 1 The middle section is located on one of the aforementioned side surfaces. The middle section does not protrude beyond the outermost peripheries of the closed surfaces of the two support frames along the radial direction of the closed surface. This structure enables the middle section to fit with the inner wall of the blood vessel when implanted in the blood vessel, stabilizing the shape memory body and fixing the relative positions of the two support frames, and in particular, will not affect the normal blood flow in the blood vessel.

[0066] The shape memory material of the present invention can be selected from metal or non-metal materials with shape memory properties, including but not limited to copper-zinc-aluminum-nickel alloy, copper-aluminum-nickel alloy, nickel-titanium alloy, zinc-copper-gold alloy and block copolymers such as polyethylene terephthalate-polyethylene oxide, polystyrene-poly (1, 4-butadiene), poly (2-methyl-2-oxazoline)-polytetrahydrofuran, etc. Nickel-titanium alloy wire with good radial support performance and axial bending performance is preferred to ensure that the implanted device has excellent elasticity after release.

[0067] The surfaces of the support frame 2 that contact the blood vessel wall can all be designed with rounded corners, and the frame edges can be connected with smooth transitions.

[0068] It can be understood that in other embodiments, the number of the supporting frames 2 can be 3 or more.

[0069] Embodiment 2:

[0070] This embodiment is basically the same as Embodiment 1. For the sake of brevity, in the description of this embodiment, the same technical features as those in Embodiment 1 are no longer described. It is only explained that this embodiment is different from Embodiment 1 in that the upper closed structure 3 and the lower closed structure 5 are respectively provided with a group of magnetic components. The magnetic components attract each other, which can strengthen the closure of the closed structure and make the closed structure more stable.

[0071] In the implant device of Example 1, in principle, due to the shape memory of the shape memory material product itself, it will return to the expected design of the closed frame shape. However, considering the obstruction of the blood vessel wall, the uncertainty of the implantation operation and the uncontrollability of the intravascular environment, the closed structure may not be positioned accurately, and the support frame may not be closed in one step.

[0072] Therefore, in this embodiment, after the implant device is implanted in the blood vessel cavity, the additional magnetic component helps to align and match the protrusions and grooves, thereby improving the success rate of support frame closure or the stability of the closed structure.

[0073] In this embodiment, the magnetic component may be a magnetic ring embedded with a deformation memory material.

[0074] Obviously, an embodiment can also be provided in which the upper closing structure 3 and the lower closing structure 5 are only provided with magnetic components without providing a combination of concave-convex and protrusions, although it may not be a preferred solution.

[0075] Example 3

[0076] On the basis of any one of the above embodiments 1-3, a pull wire is further provided on the upper closing structure 3 or the lower closing structure 5, and the operator pulls the pull wire to provide additional assistance to the closing support frame.

[0077] One end of the pull wire can be fixed to a place of the closed structural component, such as a groove or a protrusion, and the other end is not fixed and is in a free state.

[0078] In another embodiment, the pull wire is a ring-shaped closed wire, a through hole is provided at one place of the closed frame assembly, and one end of the closed wire is inserted into the through hole and closed with the other end so as to be fixed by the through hole.

[0079] The pull wire can be captured and fixed by a similar binding mechanism as described above, and then a traction force is applied, so that two matching components of the closed structure are brought close to each other and finally form a closed support frame.

[0080] Among them, the closing line is easier to be captured by the restraining mechanism.

[0081] The pull wire may be made of a material that is absorbable by the human body. For example, after a certain implantation period, the pull wire may be absorbed or degraded.

[0082] Embodiment 4:

[0083] This embodiment is basically the same as the embodiment 1. For the sake of simplicity, in the description of this embodiment, the same technical features as those of the embodiment 1 are no longer described. It is only explained that this embodiment is different from the embodiment 1 in that the frame structure 2 is a triangular structure, such as Figure 4 shown.

[0084] Embodiment 5:

[0085] This embodiment is basically the same as the embodiment 1. For the sake of simplicity, in the description of this embodiment, the same technical features as those of the embodiment 1 are no longer described. It is only explained that this embodiment is different from the embodiment 1 in that the frame structure 2 is an elliptical structure, such as Figure 5 shown.

[0086] Example 6

[0087] This embodiment provides a method for implanting a retrievable intraluminal implantable device, the process of which is as follows:

[0088] See also Figure 8 , before implantation, the device status is Figure 8 As shown;

[0089] The device is pushed through the catheter to the part of the blood vessel to be treated and slowly released. When released, one free end of the device is pushed out of the catheter first and contacts the blood vessel wall first;

[0090] Further release, when the support frame is pushed out of the catheter, the support frame returns to the state in the free state, forming a structure to be closed or a closed structure;

[0091] The support frame is adjusted using a closed structure to make the frame more stable.

[0092] This embodiment provides a method for recovering a recoverable intraluminal implantable device, and the recovery process is as follows:

[0093] Apply a traction force or other force to the free end, so that the protrusion and the groove in the closed structure are separated from each other; the support frame is opened;

[0094] Further, removing the treatment delivery device from the blood vessel and recovering it into the catheter;

[0095] When the device is retrieved into the catheter, its status is as follows Figure 8 shown.

[0096] Since the device is provided with a free end, it can be reliably connected to the delivery catheter to achieve the functions of pushing and / or recovery. The function of pushing is relatively simple compared to recovery, and a push rod can be provided in the delivery catheter to achieve the function of pushing. The push rod can have different structures, which can be a solid rod or a hollow through tube. The realization of the recovery function is more diverse, and its main change lies in the different adapter connection methods with the recovery structure of the catheter, which can be roughly divided into flexible connection and rigid connection. Flexible connection methods include snare connection and hook connection, etc., and rigid connection includes snap connection and threaded connection, etc. But no matter which connection method is used, during the recovery process of the stent, the connection structure of the stent is first retracted, and then pulled into the sheath, and then the rest of the stent is also pulled into the sheath.

[0097] The present invention also provides applications of the implantable device of the aforementioned embodiments, such as implanting the device into an arterial blood vessel to change the radius of curvature of the blood vessel, thereby reducing the patient's high blood pressure. The implantable device is used as a blood pressure lowering medical device.

[0098] As a preferred embodiment, the aforementioned implant device can be implanted in the carotid sinus.

[0099] Obviously, the implant device of the embodiment of the present invention can also be used as a supporting device for the lumen to provide an enlarged lumen space for a narrow lumen, for example, to increase the blood flow rate in the lumen per unit time.

[0100] The retrievable intraluminal implant device provided by the present invention is introduced in detail above. The implementation mode of the present invention is described by using specific examples in the present invention. The description of the above embodiments is only used to help understand the present invention. It should be pointed out that for technicians in this technical field, several improvements can be made to the present invention without departing from the principle of the present invention. These improvements also fall within the scope of protection of the claims of the present invention.

Claims

1. A retrievable intraluminal implantable device for treating hypertension, characterized in that: A deformation memory body having two free ends constructed along the length direction of a single rod, at least two openable support frames having a closed structure and formed by bending the rod between the free ends, the opening or closing of the support frame is achieved by operating the closed structure, and the closed surface formed by closing the support frame is substantially perpendicular to the length direction of the rod; the closed structure of the support frame can be opened by pulling the two free ends in opposite directions, and the deformation memory body tends to maintain the closed shape of the support frame in a non-constrained state; The support frame is a rectangular structure, a triangular structure, an elliptical structure or other polygonal structure, wherein the two support frames are the same or different in size, the portion of the rod between the two support frames is the middle section, and the middle section is located on the surface where the outermost periphery of the closed surface of the two support frames is located; The closing structure is a combination of a protrusion and a groove provided on two spatially adjacent parts of the rod, wherein the protrusion can be inserted into the groove to close the support frame, and the protrusion can be pulled out of the groove to open the closed support frame. Alternatively, the closed structure is a combination of mutually attractive magnetic parts respectively arranged on two spatially adjacent parts of the rod.

2. The implant device according to claim 1, characterized in that The middle section is a straight rod structure and is perpendicular to the closed surfaces of the two supporting frames.

3. The implant device according to claim 1, characterized in that The middle section is a non-closed arc-shaped structure.

4. The implant device according to claim 1, characterized in that: The magnetic member is a magnetic ring embedded in the rod body.

5. The implant device according to claim 1, characterized in that: The invention also comprises a pull wire, which is fixed to one of the components of the closed structure and is used to pull the two matching components of the closed structure closer.

6. The implant device according to claim 5, characterized in that: The pull wire is an absorbable wire.

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