A retrievable intraluminal implant device and its application

Abstract

The present invention discloses a retrievable intraluminal implant device, comprising a support rod, a gripping rod connected to the support rod, and a recovery part for recovering or re-releasing the implant device, wherein both ends of the support rod are bent into the lumen and provided with an embedding part. The device of the present invention can be effectively recovered or re-released, and the risk of damaging the inner wall of the blood vessel or tissue cavity during the recovery process can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of interventional medical devices, in particular to a retrievable intraluminal implant device, and more particularly to an intraluminal implant device implanted in an artery for lowering blood pressure. Background Art

[0002] About one in ten people in the world suffer from hypertension, of which nearly 100 million suffer from refractory hypertension, also known as intractable hypertension. Patients with refractory hypertension have high blood pressure that is difficult to control and are highly dangerous. Refractory hypertension is a major difficulty in the treatment of hypertension.

[0003] One of the device-based treatments for refractory hypertension is carotid baroreflex activation therapy (BAT), which is based on the theory that increased sympathetic nerve tone and decreased vagal nerve tone are closely related to the onset of heart failure symptoms and disease progression. When the heart's contractile arterial blood pressure reflexively increases, the carotid sinus and aortic arch baroreceptors can sense vasodilation and transmit afferent impulses to the solitary nucleus of the central nervous system, thereby reducing the signals of the sympathetic system's efferent nerves to the heart, peripheral blood vessels, and kidneys, causing decreased cardiac contractility, vasodilation, and reduced renin secretion. At the same time, the output of parasympathetic signals is increased, causing a decrease in heart rate and blood pressure, thereby improving cardiac function and clinical prognosis in patients with heart failure.

[0004] For example, Vascular Dynamics has developed a The system has been put into practical use. It is a new type of device that can be implanted in a blood vessel, reshape the carotid sinus and amplify the pressure sensing signal. It is made of self-expanding nickel-titanium material. It is a mechanical device that is placed in a suitable position of the internal carotid artery by a standard percutaneous catheter. It can stimulate the pressure receptor nerves that can regulate heart rate and blood output. The intermittent geometric changes of the venous sinus are passively activated to increase the stretch of the pulsating wall, thereby regulating the blood pressure of the human body. The apparatus related to this method can be found in Chinese patent CN201180022468.5, which is fully incorporated into this application.

[0005] Actual surgical situations are more complicated. Most similar interventional devices, such as stents, may not meet the expected shape or position after release and cannot meet treatment needs. They often need to be recovered or released again after recovery. However, the devices or systems mentioned above cannot be recovered.

[0006] Therefore, the prior art still has room for improvement and development. Summary of the invention

[0007] One object of the present invention is to provide a retrievable intraluminal implant device which can be easily retrieved or released a second time after being implanted into the lumen.

[0008] An embodiment of the retrievable intraluminal implant device of the present invention may include: a plurality of longitudinally extending support rods, and a gripping rod connecting two adjacent support rods in a non-longitudinal direction, wherein the plurality of support rods are arranged circumferentially and connected to the gripping rods to form an elastic support body that can be radially compressed, and also includes a recovery portion arranged on one end of the support rod, wherein the recovery portion includes a linear flexible member and a positioning structure arranged on the corresponding end of each support rod for positioning the flexible member, and the flexible member is connected to each support rod via the positioning structure.

[0009] Among them, the elastic support body can be used as a functional structure to achieve a medical treatment effect on the implanted person. For example, the elastic support body can be placed in a narrow segment in a blood vessel to expand the lumen of the blood vessel. For another example, the elastic support body can also change the shape of the implanted blood vessel segment, adjust the shape of the blood vessel segment or change the tension of the blood vessel wall to achieve the effect of treating hypertension in the implanted person. Those skilled in the art can change or adjust the elastic support body structure as needed to achieve the desired effect or function.

[0010] The recovery part, as a structure for recovering the device, can be arranged at one or both ends of the support rod, and can include a flexible member and a positioning structure, through which the flexible member is connected to each support rod. When recovering, the flexible member can be captured and pulled by an external capture device, thereby pulling each support rod together, so that the outer diameter of the device is reduced, and finally the device can be collected into the recovery catheter. The capture device can be an interventional device with a recovery hook or a similar capture function component.

[0011] The positioning structure may include fixing holes provided on the end rod bodies of the support rods and / or fixing hooks formed by bending the end rod bodies, and the flexible member may connect all the support rods via the fixing holes and / or fixing hooks.

[0012] The flexible member may sequentially or non-sequentially connect the support rods in series. For example, the flexible member sequentially connects the support rods in series through a fixing hole, or the flexible member sequentially connects the support rods in series through a fixing hook, or the flexible member first connects two non-adjacent support rods in series through a fixing hole, and then connects other support rods in series, and finally connects the support rods in series in a closed ring structure.

[0013] In an embodiment of the present invention, the flexible member is fixedly connected or movably connected to the support rod.

[0014] For example, in one embodiment of the movable connection, the flexible member passes through the fixing holes on the same end side of each support rod and connects the end to the end, thereby connecting the support rods.

[0015] In another embodiment of the movable connection, the flexible member is connected end to end and is bound in the hook bends of each fixing hook.

[0016] As an optional implementation of the fixed connection, the flexible member is bound to the fixing hole or the fixing hook.

[0017] It should be understood that in an implant device, the flexible member can be fixedly connected to one or more support rods and simultaneously movably connected to another one or more support rods. A flexible member can be connected to all support rods at one end of the elastic support body using embodiments including but not limited to the aforementioned fixed connection and movably connected.

[0018] As a preferred embodiment, the flexible member is limited to a ring shape by the positioning structure. The "ring shape" in the present invention, unless otherwise specified, should be understood in a broad sense, including but not limited to a circular ring shape, an elliptical ring shape, a square shape and other polygonal shapes.

[0019] As a preferred embodiment, at least one pressing and gripping rod has a pressing and gripping structure. Optionally, the pressing and gripping structure on the pressing and gripping rod is in a “V” shape, a “Ω” shape, a “W” shape or a “U” shape.

[0020] The present invention also provides an improved embodiment of a retrievable intraluminal implant device, wherein the support rod is provided with a curved section protruding toward the outside of the elastic support body near at least one of its two ends, and the curved sections of each support rod on the same end side are combined to form an embedded portion of the elastic support body.

[0021] Preferably, the support rods are respectively provided with bent sections protruding toward the outside of the elastic support body at the parts adjacent to the two ends thereof, and the bent sections at the two end sides of each support rod are combined to respectively constitute the first embedding portion and the second embedding portion of the elastic support body, and the first embedding portion and the second embedding portion have the same or different sized outer circumferences.

[0022] As a further improvement, the rod body at the end of the support rod is bent toward the inside of the elastic support body to form a positioning structure fixing hook for positioning the flexible member, and the rod body of the support rod is directly transitioned from the bent section constituting the embedding portion to the fixing hook.

[0023] Wherein, the fixing hook can be formed by bending the support rod body from the outer flange of the bending section toward the inner side of the elastic support body.

[0024] Along the radial direction of the elastic support body, the fixing hook is located outside the inner circumference surrounded by the middle sections of the plurality of support rods.

[0025] The present invention also provides some implementation modes, wherein when the elastic support body is in an unconstrained state, the flexible member is in a tensioned state.

[0026] Furthermore, the flexible member is a wire having substantially no stretchable elastic force.

[0027] For example, the flexible member may be a metal wire or a high molecular polymer wire, preferably a bioabsorbable wire, such as a biodegradable polymer wire.

[0028] Another object of the present invention is to provide an intra-arterial implant device for treating and / or preventing hypertension. The intra-arterial implant device can be the aforementioned intraluminal implant device, and it changes the tension state of the arterial wall in the implanted artery in order to achieve the effect of treating hypertension.

[0029] A preferred embodiment of the intra-arterial implant device comprises an elastic support body composed of four or more support rods, wherein the elastic support body has a cross-sectional profile that is substantially rectangular, trapezoidal or other polygonal.

[0030] After implantation, the intra-arterial implant device applies a mechanical force to the subject's artery, such as the carotid artery, the aorta, the subclavian artery and / or the cerebral artery. The mechanical force is directly applied to the blood vessel, causing the shape of the artery to change, thereby changing the tension state of the arterial wall. For example, the shape of the artery changes from a circle to an ellipse and / or causes a local change in the shape of the artery (such as a depression or a curved surface point on the arterial wall). The wall of the artery may have a rich area of ​​pressure receptors, and the tension of the wall of the artery regulates the activity of the subject's pressure receptors to reduce the subject's hypertension. The application of mechanical force may also directly affect the pressure receptors.

[0031] In summary, the present invention has the following advantages compared to the prior art:

[0032] The implant device of the present invention is provided with a recovery part, which can be used to recover the implant device, thereby avoiding the damage to the patient caused by poor treatment effect or failure to recover due to an inappropriate placement position.

[0033] Some embodiments of the present invention are provided with an embedding portion, which has a diameter greater than that of the middle section of the support rod. The embedding portion can fit well with the inner wall of the lumen, play a positioning role in the lumen, and prevent the device from moving or flipping in the lumen. At the same time, the positioning structure is arranged on the inner side of the embedding portion, so that there is a certain safety distance between the positioning structure and the inner wall of the lumen, thereby reducing the risk of damaging the inner wall of the blood vessel or tissue cavity. 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 It is a three-dimensional schematic diagram of an embodiment of a retrievable intraluminal implant device of the present invention;

[0036] Figure 2 for Figure 1 A front view of an embodiment of the retrievable intraluminal implant device;

[0037] Figure 3 for Figure 1 A left side view of an embodiment of the retrievable intraluminal implant device shown;

[0038] Figure 4 for Figure 1 A top view of an embodiment of the retrievable intraluminal implant device;

[0039] Figure 5 It is a plan view of an implant device embodiment of the present invention after unfolding;

[0040] Figure 6 This is a schematic diagram of an embodiment of a recovery portion of an implant device of the present invention;

[0041] Figure 7 for Figure 6 The enlarged schematic diagram of the middle A part;

[0042] Figure 8 It is a schematic diagram of another embodiment of the implant device recovery part of the present invention;

[0043] Fig. 9 This is a schematic diagram of the change in the diameter of the lumen wall before and after the implant device of the present invention is implanted into the lumen;

[0044] Fig.10 This is a schematic diagram of an implant device embodiment of the present invention being implanted into a lumen;

[0045] Fig.11 This is an overall schematic diagram of the recovery phase of an implant device embodiment of the present invention.

[0046] Fig.12 for Fig.10 The enlarged schematic diagram of the middle part B;

[0047] Fig.13 for Fig.10 A schematic diagram of a recovery state of part B of the implant device embodiment shown;

[0048] Fig.14 A schematic diagram of an implant device embodiment of the present invention being recovered into a sheath;

[0049] In each of the drawings, the reference numerals are described as follows:

[0050] 11 is a support rod; 21 is a gripping rod, 22 is a gripping structure; 31 is a flexible member, 32 is a positioning structure; 33 is a fixing hook; 4 is an embedding portion; 5 is a fixing hole; 6 is a carotid artery; 7 is a recovery sheath, and 8 is a capture device. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0052] One object of the present invention is to provide a retrievable intraluminal implant device, which includes: at least three or more longitudinally extending support rods, and a gripping rod connecting two adjacent support rods in a non-longitudinal direction, the gripping rod having a gripping structure, a plurality of support rods are arranged circumferentially and connected to the gripping rod to form an elastic support body that can be radially compressed, and also includes a recovery portion arranged on one end side of the support rod, the recovery portion includes a linear flexible member and a positioning structure arranged on the corresponding end of each support rod for positioning the flexible member, and the flexible member is connected to each support rod through the positioning structure.

[0053] Specifically, the retrievable intraluminal implant device of the present invention can be a stent, which can be used in the esophagus, gastrointestinal tract (including intestines, stomach and colon), trachea and bronchial tract, urinary tract, bile duct, vascular system, etc. of the subject, and can be retrieved after being implanted in the lumen of the aforementioned organs or tissues, and the stent can be removed from the lumen.

[0054] Among them, see Fig. 9 Before implantation into the lumen, the elastic support body of the stent in the unconstrained state usually has an outer diameter R1 or R2 larger than the lumen into which it is implanted. Fig.11 or Fig.12 When the stent is compressed by the inner wall of the lumen, at least the elastic support body will shrink radially relative to its unconstrained state, thereby fixing the position of the stent in the lumen.

[0055] The support rod and at least a portion of the gripping rod contact the inner wall of the lumen to form a wall contact area where the elastic support body contacts the inner wall of the lumen, for example, see Figure 1 For example, the plane where the middle sections of two adjacent support rods 11 are located is not coplanar with the plane where the gripping rod 21 connecting the two adjacent support rods is located. Specifically, when part of the gripping rod 21 tends to the central axis of the elastic support body, the support rod and part of the gripping rod are in contact with the inner wall of the lumen, and the axial direction of the support rod usually conforms to the axial direction of the lumen.

[0056] Optionally, all support rods and the gripping rods are in contact with the inner wall of the tube cavity, forming a wall contact area where the elastic support body contacts the inner wall of the tube cavity. Figure 1 and 11 For example, when the plane where the middle sections of two adjacent support rods 11 are located is coplanar with the plane where the gripping rod 21 connecting the two adjacent support rods is located, both the support rods and the gripping rod are in contact with the inner wall of the lumen, and the axial direction of the support rods usually conforms to the axial direction of the lumen.

[0057] The pressure gripping rod provides deformation capability for the elastic support body, and a pressure gripping structure 22 is provided on the pressure gripping rod 21 to resist the extrusion of the lumen and maintain the stability of the elastic support body structure.

[0058] Optionally, the elastic support body may have a cross-sectional profile with substantially four sides or more than four sides, such as four support rods arranged, which may be rectangular or trapezoidal, or for example five or six or more support rods arranged.

[0059] The elastic support body can usually be designed as a functional structure to provide a medical treatment effect to the implanted person. For example, the elastic support body can be placed in a narrow section of a blood vessel to expand the lumen of the blood vessel.

[0060] For another example, the elastic support body can also change the appearance of the implanted blood vessel segment, adjust the shape of the blood vessel segment or change the tension of the blood vessel wall, thereby achieving the effect of treating hypertension in the recipient.

[0061] Without being limited to the above description, those skilled in the art may change or adjust the structure of the elastic support body as required to achieve the desired effect or function.

[0062] Furthermore, the present invention particularly provides a design of a recovery part based on the aforementioned elastic support body, see Figure 1 The recovery part serves as a recovery structure for the device, including a flexible member 31 and a positioning structure 32. The flexible member is connected to each support rod through the positioning structure. The flexible member 31 can be pulled to make the support rod move away from the inner wall of the tissue cavity and gather into the cavity. At the same time, the pressing rod and the pressing structure arranged on the pressing rod also deform, and cooperate with the support rod to retract the device for recovery.

[0063] See also Figure 7 The positioning structure 32 may include a fixing hole 5 provided on the end rod body of each support rod and a fixing hook 33 formed by bending the end rod body.

[0064] Alternatively, the positioning structure may be only one of a fixing hole and a fixing hook.

[0065] The positioning structure 32 may also be provided with an X-ray development mark, such as medical gold or platinum material, which helps to identify the position of the positioning structure or the flexible member during the recycling process.

[0066] The flexible member can be selected by connecting the supporting rods in series, either sequentially or non-sequentially. Figure 6 As shown, the flexible member 31 is connected in series with each support rod in sequence through the fixing hole 5. Figure 8 As shown, the flexible member can also connect the support rods in series in sequence through a fixing hook, or the flexible member can first connect two non-adjacent support rods in series through a fixing hole, and then connect other support rods in series through other fixing holes or fixing hooks, finally forming a closed ring structure.

[0067] The flexible member and the support rod may be fixedly connected or movably connected.

[0068] For example, an implementation of an active connection, see Figure 6 and Figure 7 The flexible member 31 passes through the fixing holes 5 on the same end side of each support rod 11 and connects the end to the end, thereby connecting the support rods.

[0069] For another implementation of active connection, see Figure 8 The flexible member 31 is connected end to end and is bound in the hook bend of each fixing hook 33, and the flexible member 31 is in a tensioned state. The flexible member can be a line with substantially no stretching elasticity. Preferably, the flexible member can be a biodegradable polymer line.

[0070] As an optional implementation of the fixed connection, the flexible member may also be bound in a fixing hole or a fixing hook.

[0071] It should be understood that in an implant device, the flexible member can be fixedly connected to one or more support rods and simultaneously movably connected to another one or more support rods. A flexible member can be connected to all support rods at one end of the elastic support body using embodiments including but not limited to the aforementioned fixed connection and movably connected.

[0072] The flexible member is limited to an annular shape by the positioning structure. The "annular shape" mentioned in the present invention, unless otherwise specified, should be understood in a broad sense, including but not limited to a circular ring shape, an elliptical ring shape, a square shape and other deformable shapes.

[0073] The gripping structure of the gripping rod can be in a "V" shape, "Ω" shape, "W" shape or "U" shape. The purpose of the above-mentioned shape design is to make it have the characteristic of being compressible, which can cause the gripping rod to deform to a certain extent, thereby reducing the complexity of the recycling process. It should be understood that the shape of the gripping structure includes but is not limited to the shapes listed above. The above-mentioned "V"-shaped, "Ω"-shaped, "W"-shaped or "U"-shaped gripping structures also include "V"-shaped, "Ω"-shaped, "W"-shaped or "U"-shaped shapes. Furthermore, it can also be a deformation or modification of the above shapes. For example, the gripping structure can also be in an "M" shape.

[0074] The rod body of the support rod or the grip rod may also be provided with hollow or non-hollow grooves as required, which may be helpful for endothelialization of the device after implantation. Figure 5 Each support rod is shown to be provided with three slots.

[0075] The aforementioned device can be further improved by providing an embedding and pressing portion on the device.

[0076] An implementation method of the embedding portion, such as Figure 2As shown, the two ends of the support rod are provided with curved sections protruding toward the outside of the elastic support body, and the curved sections of each support rod at the same end are combined to form the embedding and pressing part of the elastic support body. Figure 2 It is shown that the elastic support body has an embedding portion at each end of the support rod, which can be named as a first embedding portion and a second embedding portion, respectively, and the first embedding portion and the second embedding portion have outer circumferences of different sizes.

[0077] Obviously, a first pressing portion and a second pressing portion with the same outer circumference may be provided as required.

[0078] The rod body at the end of the support rod is bent toward the inner side of the elastic support body to form a fixing hook for positioning the flexible member. Preferably, the rod body of the support rod is directly transformed into the fixing hook by the bending section constituting the embedding portion. Figure 2-3 .

[0079] The present invention also provides an intra-arterial implant device for treating hypertension, which may be the aforementioned intraluminal implant device, for example, an elastic support body composed of four or more support rods, wherein the elastic support body has a cross-sectional profile that is basically rectangular, trapezoidal or other polygonal, and changes the tension state of the arterial wall in the artery into which it is implanted, in the hope of achieving the effect of treating hypertension.

[0080] After implantation, the intra-arterial implant device can apply a mechanical force to the artery of the subject, such as the carotid artery, the aorta, the subclavian artery and / or the cerebral artery. The mechanical force is directly applied to the blood vessel, causing the shape of the artery to change, thereby changing the tension state of the arterial wall. For example, the shape of the artery changes from a circle to an ellipse and / or causes a local change in the shape of the artery (such as a depression or a curved surface point on the arterial wall). The wall of the artery may have a rich area of ​​pressure receptors, and the tension of the wall of the artery regulates the activity of the subject's pressure receptors to reduce the subject's hypertension. The application of mechanical force may also directly affect the pressure receptors.

[0081] An embodiment of a retrievable intra-arterial implant device, see Figure 1-4 , including four longitudinally extending support rods 11, and a gripping rod 21 connecting two adjacent support rods in a non-longitudinal direction. The four support rods 11 are arranged in a circumferential direction and connected with the gripping rod 21 to form an elastic support body that can be radially compressed.

[0082] See also Figure 11-12 The elastic support body changes the tension of the arterial wall in order to achieve the effect of treating hypertension.

[0083] A gripping structure 22 is provided between two adjacent gripping rods 21. Figure 1Two types of crimping structures are shown, which are respectively in an "Ω" shape and a "V" shape. The crimping structures and the crimping rods are symmetrically arranged on the four sides of the elastic support body, so that the elastic support body has different compressibility in different directions.

[0084] The device of this embodiment further comprises a recovery part arranged at one end of the support rod 11, the recovery part comprises a linear flexible member 31 and a positioning structure 32 arranged at the corresponding end of each support rod for positioning the flexible member, see Figure 6 and Figure 7 The positioning structure 32 is a fixing hook 33 with fixing holes 5, and the flexible member passes through the fixing holes to connect the support rods.

[0085] Continue to see Figure 1 The support rod 11 is provided with curved sections protruding toward the outside of the elastic support body at the parts near its two ends, and the curved sections at the two end sides of each support rod are combined to constitute the first embedding part and the second embedding part of the elastic support body, respectively, and the first embedding part and the second embedding part have different circumferences.

[0086] Before the device of this embodiment is implanted into the arterial cavity, the support rod and the gripping rod are in a non-constrained state. Figure 1 As shown, the flexible member can be a polymer wire, connected in series with each support rod, and is in a tensioned state. Figure 11-12 After the device is implanted in the lumen, the diameter of the first embedding portion is L3, which is the maximum diameter on the stent at this time, so that the first embedding portion can provide sufficient radial strength to maintain its position in the lumen.

[0087] The device of this embodiment can be made of nickel-titanium alloy. The nickel-titanium alloy tube is laser cut, heat-treated by a mold at high temperature, and then sandblasted and polished. The inner diameter of the alloy can be selected to be 0.5-1.5mm and the outer diameter is 1.5-3mm. The nickel-titanium material itself has superelasticity and shape memory recovery. The device product of this embodiment is compressed in the delivery system and can self-expand and release into the expected heat-set shape after being released in the blood vessel.

[0088] Due to the material properties used, the implant device can be compressed and can return to its original shape after the external force is removed. When the stent body is implanted into the lumen, the support rod 11 first contacts the inner wall of the lumen and radially widens the inner wall of the lumen to increase the diameter of the lumen. The shape of the lumen can be changed, resulting in a change in the geometric shape of the inner wall. For example, the lumen changes from an original circular shape to an approximately elliptical shape, such as Fig. 9 As shown, this causes local changes in the shape of the artery (such as depressions or curved points on the arterial wall) and changes in the radius of curvature of the lumen.

[0089] See also Fig.10, shows a recovery or capture device and the state of the device of this embodiment. The recovery or capture device includes a recovery sheath 7 and a capturer 8 arranged therein, the capturer is provided with capture hooks with the same number of rods as the support rod, and the flexible member 31 can be captured and pulled by the capture hooks on the capturer.

[0090] The following Figure 12-14 The implant device shown schematically illustrates the process of its retrieval.

[0091] See also Fig.11 and Fig.12 , shows the state of the implant device being implanted in the artery. At this time, the entire device is restricted by the artery and is in a restrained state. Specifically, the device support rods and the pressure grip rods are in contact with the inner wall of the artery, and the flexible member is connected in series with the support rods. The distance L1 of the middle section of the stent and the distance L2 and L3 of the first and second pressing parts of the recovery end are all slightly reduced compared to the non-restrained state.

[0092] See also Fig.13 , shows the initial state of the implant device being recovered. The implant device has not yet been recovered to the recovery sheath. At this time, the capture device pulls the flexible member and drives the fixing hook to deform. Specifically, the first embedding portion gradually moves away from the inner wall of the artery, and the inner diameter or outer circumference of the first embedding portion is reduced from L3 to L3'. The fixing hooks located at the embedding portion begin to gather toward the central axis of the device. The angle of the "V"-shaped gripping structure of the two gripping rods shown in the figure also becomes smaller due to compression, that is, β'<β.

[0093] See also Fig.14 , the catcher 8 continues to apply traction to the flexible member of the implant device, so that the outer diameter of the implant device is reduced, and it is finally recovered to the recovery sheath, the gripping structure of the gripping rod is fully compressed, and the distance between the first and second embedded parts and the middle section of the support rod reaches the minimum value from implantation to recovery, that is, L3" <L3’<L3,L2”<L2’<L2,L1”<L1’<L1。

[0094] The present invention has been introduced in detail above. The embodiments of the present invention are described by using specific examples. The description of the above embodiments is only used to help understand the present invention. It should be pointed out that for those skilled in the art, several improvements can be made to the present invention without departing from the principles 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 implant device, comprising: A plurality of support rods extending longitudinally, and a gripping rod connecting two adjacent support rods in a non-longitudinal direction, wherein the plurality of support rods are arranged in a circumferential direction and connected to the gripping rod to form an elastic support body that can be radially compressed, characterized in that: it also includes a recovery portion arranged on one end side of the support rod, the recovery portion includes a linear flexible member and a positioning structure arranged at the corresponding end of each support rod for positioning the flexible member, the flexible member is connected to each support rod through the positioning structure, The flexible member is limited to a ring shape by the positioning structure, and when the elastic support body is in an unconstrained state, the flexible member is in a tensioned state; The positioning structure comprises a fixing hook formed by bending a rod body at an end of a support rod toward an inner side of an elastic support body and used to position the flexible member, wherein the fixing hook is provided with a fixing hole, and the flexible member is connected to all support rods through the fixing hole; The support rod is provided with a bent section protruding toward the outside of the elastic support body at the parts near its two ends, and the bent sections at the two end sides of each support rod respectively constitute the first embedding portion and the second embedding portion of the elastic support body, and the rod body of the support rod is directly transitioned to the fixed hook by the bent section constituting one of the first embedding portion and the second embedding portion.

2. The intraluminal implant device according to claim 1, characterized in that: The flexible member is connected in series with the support rods sequentially or non-sequentially.

3. The intraluminal implant device according to claim 1, characterized in that: The flexible member is fixedly connected or movably connected to the support rod.

4. The intraluminal implant device according to claim 1, characterized in that: The flexible member passes through the fixing holes on the same end side of each support rod and is connected end to end, thereby connecting each support rod; or, the flexible member is bound to the fixing hole.

5. The intraluminal implant device according to claim 1, characterized in that: More than one pressing and gripping rod is provided with a pressing and gripping structure, and the pressing and gripping structure of the pressing and gripping rod is in a "V" shape, a "Ω" shape, a "W" shape or a "U" shape.

6. The intraluminal implant device according to claim 1, characterized in that: The first pressing portion and the second pressing portion have peripheries of the same or different sizes.

7. The intraluminal implant device according to claim 1, characterized in that: Along the radial direction of the elastic support body, the fixing hook is located outside the inner circumference surrounded by the middle sections of the plurality of support rods.

8. The intraluminal implant device according to claim 1, characterized in that: The flexible member is a substantially non-stretchable elastic line.

9. The intraluminal implant device according to claim 1, characterized in that: The flexible member is a metal wire or a high molecular polymer wire.

10. The intraluminal implant device according to claim 9, characterized in that: The flexible member is a bioabsorbable thread.

11. An intra-arterial implant device for treating hypertension, characterized in that: The intra-arterial implant device is the intraluminal implant device according to any one of claims 1 to 10, and changes the tension state of the arterial wall in the implanted artery.

12. The intra-arterial implant device according to claim 11, characterized in that: The elastic support body comprises four or more support rods, wherein the elastic support body has a cross-sectional profile that is substantially rectangular, trapezoidal or other polygonal.

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