CN113057773A - Recyclable intraluminal implanting instrument and application thereof - Google Patents

Abstract

The invention relates to a recyclable intraluminal implanting instrument, which comprises a shape-changing memory body which is formed by a single rod along the length direction and is provided with two free ends, wherein the shape-changing memory body comprises at least two support frames which are formed by the rod and are provided with closed structures between the two free ends, the closed surface formed by the closed support frames is basically vertical to the length direction of the rod, and the implanting instrument is formed by winding the rod, so that the support frames can be opened by reversely pulling the two free ends to release the closed structures, thereby completing recycling.

Description

Recyclable intraluminal implanting instrument and application thereof

Technical Field

The invention belongs to the technical field of medical instruments, relates to a recyclable intraluminal implanting instrument and application thereof, and particularly relates to a recyclable medical instrument for treating hypertension and application thereof.

Background

The treatment of hypertension based on baroreceptor reflex activation therapy is under investigation. The baroreceptors are rich pressure sensitive nerve endings under the outer membranes of the blood vessel walls of the carotid sinus and the aortic arch, and the arterial baroreceptors do not directly sense the change of blood pressure but sense the mechanical tension degree of the blood vessel walls. When the arterial blood pressure is increased, the degree of stretching of the arterial wall is increased, and nerve impulses emitted by the baroreceptors are increased, so that the blood pressure is reduced. Research shows that in a certain range, the afferent impulse frequency of the baroreceptors is in direct proportion to the expansion degree of the arterial wall, and the mechanical tension degree of the baroreceptors sensing the vascular wall is in direct proportion to the curvature radius of the blood vessel. The following documents are incorporated by reference: suding von arterial pressure-sensitive reflex and cardiovascular disease [ M ]// suding von, mukoro jade, maing cardiovascular pharmacology, 2 nd edition, beijing: scientific press, 2010: 101-: systematic review and subsequent analysis ", tangt.y., european endovascular vascular surgery, month 9, 2007; 34(3): 304-11; "baroreceptor-mediated changes in arterial pressure in coronary arteries: primary study in sheep in awake and anesthetized states, "bennettsj.s., physio-pharmacological clinics and experiments, month 9 in 2001; 28(9): 768-72 parts; "stress mechanism on carotid baroreceptors", landgrens, scandinavia physiology bulletin, 7/17 in 1952; 26(1): 1 to 34; "effects of varying mean, pulsatile, and pulsatile frequency on the stimulatory activity in baroreceptor fibers from the aortic arch and right subclavian artery in rabbits", AngellJames JE, journal of physiology.1971 for 4 months; 214(1): 65-88.

The American vessel dynamics company develops a device MobiusHD based on the principle of pressure-sensitive reflex activation therapy, is a novel mechanical device which is implanted in a blood vessel, can reshape the carotid sinus and amplify pressure-sensitive signals, adopts the texture of self-expanding nickel-titanium materials, and is placed in a proper position of an internal carotid artery through a standard percutaneous catheter. The intermittent geometry changes of the venal sinus are passively activated to increase the stretching of the pulsatile wall. At present, the three specifications of 5.0-7.0mm, 6.25-9.00mm and 8.00-11.75mm are mainly available, and the clinical stage is still in progress.

However, such devices also have deficiencies. The metal stent exists in a blood vessel for a long time, the metal stent has certain influence on the reconstruction of the endothelium of the blood vessel wall and the normal contraction and relaxation of the blood vessel, and particularly when the blood vessel in situ is subjected to restenosis, a new stent is difficult to expand in the original metal stent, so that obstacles are added to secondary treatment. Thus, the presence of a vascular stent in the body after vascular function is complete or repaired has no significance.

The study on the clinical application of carotid artery stenosis treatment by carotid artery angioplasty stent implantation by people of Liujian, Houkai, Lihui and the like is carried out, and the fact that after the carotid artery angioplasty stent implantation, because intracranial arteries are in a low perfusion state for a long time, sufficient compensation is not provided, the self-regulation function of blood vessels is damaged, and the complication of high perfusion syndrome can be probably caused. Therefore, the recovery of the intravascular stent is a problem which needs to be solved at present.

Chinese patent CN106063735 discloses an artificial blood vessel stent and a conveyor thereof, comprising a head end bare stent, a film covering main body, a tightening wire and a conveying wire; one end of the tightening wire is connected with the rear end of the film covering main body; the other end of the tightening wire is connected with the conveying wire. The conveyor comprises: guide head, core pipe, main sheath pipe, outer tube. The tightening wire is connected with the conveying wire and the conveying wire is connected with the conveyor, the recovery purpose of the vascular stent is secondary positioning and releasing, and the recovery of the vascular stent is not suitable for months.

Therefore, there is a need to develop a new structure and performance of the apparatus for treating hypertension.

Disclosure of Invention

The invention aims to provide a recyclable intraluminal implantation instrument, which can solve the problems that a hypertension treatment device in the prior art has poor blood pressure reduction effect, cannot be stably fixed in a carotid artery, is displaced or overturned along with blood pressure impact, is difficult to recycle and the like.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

providing a recoverable intraluminal implanting instrument, comprising a shape-changing memory body with two free ends and a single rod which is constructed along the length direction of the rod, at least two openable supporting frames with a closed structure and a bent structure of the rod are arranged between the free ends, and the closed surface formed by the closed supporting frames is basically vertical 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, the shape-changing memory tending to maintain the closed shape of the support frame in the unconstrained state.

In the description of the present invention, it should be noted that the "shape change memory body with two free ends constructed by a single rod along the length direction" does not limit the manufacturing method of the present apparatus, and the manufacturing method of the present apparatus may be the shape change memory body structure made by laser cutting a tubular material or by bending a single rod, or may be the form of other conventional processes which are not mentioned in the present invention but well known to those skilled in the art, and the shape change memory body structure finally obtained is the structure which can be flattened along the length direction into a single straight rod in an ideal situation which is obviously imaginable and does not require the shape change memory body structure to have the shape change capability in the ideal situation.

In the description of the present invention, it should be further noted that the "deformation memory" refers to a structure having an elastic deformation capability in the present invention, that is, a structure that can be deformed when an external force is applied and can recover or tend to recover to the original shape when the external force is removed. For example, conventional stents implanted in blood vessels are all shape change memories. Such elastic deformation capability can be obtained by selecting a deformation memory material and by means of hot working, which is conventional in the art.

In the embodiment of the implanting apparatus of the present invention, the support frame may have a rectangular structure, a triangular structure, an oval structure or other polygonal structures.

Wherein the two support frames are the same or different in size.

According to the invention, the support frame is preferably a rectangular structure, and the number of the support frames is two.

As another embodiment, one skilled in the art may set the number of the support frames to 3 or more as necessary.

In an embodiment of the implanting apparatus of the present invention, the portion of the rod between the two support frames is a middle section located at an outermost peripheral face of the closed faces of the two support frames. The middle section can not protrude out of two sides of the outermost periphery of the closed surfaces of the two support frames along the radial direction of the closed surfaces, and the structure enables the middle section to be attached to the inner wall of a blood vessel when the middle section is implanted into the blood vessel, so that the functions of stabilizing the shape memory body and fixing the relative positions of the two support frames are achieved, and particularly normal blood flow in the blood vessel cannot be influenced.

The middle section can be of a straight rod structure and is perpendicular to the closed surfaces of the two supporting frames. However, alternatively, the intermediate section may be a non-closed arc-like structure.

In an embodiment of the implantation instrument according to the invention, the free end may be provided with a ball-shaped knob, which may have a larger diameter, so as to be easily caught and restrained by the restraining unit. The free end can be also provided with a developing mark, so that the positioning is convenient.

In one embodiment of the implanting apparatus of the present invention, the closing structure is a combination of a protrusion and a groove disposed on two spatially adjacent portions 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.

In another embodiment of the implanting apparatus of the present invention, the closing structure is a combination of magnetic members that attract each other and are respectively disposed on two spatially adjacent portions of the rod. In a preferred embodiment, the magnetic member is a magnetic ring embedded in the rod body.

The combination of the two aforementioned occlusive structures may be administered either alternatively or simultaneously. Obviously, it is a preferred embodiment to provide a combination of magnetic elements in the vicinity of the projection and recess combination.

The present invention also provides a further improved embodiment of the aforementioned implantation instrument, further comprising a pull wire fixed to one of the components of the closure structure, the pull wire being used to pull the two components of the closure structure towards each other. One end of the pull wire can be fixed on one of the components of the closed structure, the other end of the pull wire can directly extend out of the body along a path constructed by the interventional operation, or the other end of the pull wire does not directly extend out of the body and is led into an implantation position of the implantation instrument through another traction mechanism, and the traction mechanism is utilized to pull the free end of the pull wire to enable the two components which are matched to be pulled close or directly realize the closing.

Preferably, the pull cord is an absorbable cord.

The invention also provides the application of the implant device in being used as a medical device for treating hypertension.

The invention also provides the application of the implantation device in the medical device implanted in the carotid sinus

In conclusion, compared with the prior art, the invention has the following advantages:

a) the closed structure is arranged at the bending position of the support bracket and the middle connecting piece, and after the product is released, the position of the protruding structure is adjusted through the pull wire, so that a closed support structure is formed, and the curvature radius of the blood vessel can be increased to a greater extent.

b) The straight rod at the head end and the tail end of the instrument is designed to be 90 degrees with the supporting surface, so that the supporting surface is close to the radial surface of a blood vessel, and the effect of changing the curvature radius of the blood vessel is obvious.

c) The round head design of the starting end and the tail end of the instrument is convenient for clamping the round head by using a clamp or a capture ring and temporarily taking out the round head by using a minimally invasive surgery, and the instrument is prevented from stabbing and puncturing inner wall tissues due to tiny deviation along with the impact of blood flow.

d) This apparatus adopts cylindrical structural design, and the adherence compliance is good, easily makes the moulding anticipated shape that becomes of vascular wall, and difficult fracture vascular wall or production stress concentration damage vascular wall.

e) The instrument has good biocompatibility, and can be stretched into a straight line or tend to a straight line by applying a certain force due to the fact that the instrument is formed by winding a rod, so that the instrument is convenient to recycle into a sheath tube.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of an implantation instrument embodiment 1 of the present invention;

FIG. 2 is an enlarged schematic view of the upper closure structure in embodiment 1 of the insertion device of the present invention

FIG. 3 is an enlarged schematic view of the lower closure structure of embodiment 1 of the insertion instrument of the present invention;

FIG. 4 is a schematic structural view of an implanting device of embodiment 4 of the present invention;

FIG. 5 is a schematic structural view of an implantation instrument embodiment 5 of the present invention;

FIG. 6 is a schematic cross-sectional view of the device of the present invention implanted within a lumen of a blood vessel;

FIG. 7 is a schematic representation of the change in vessel diameter before and after implantation of an embodiment of the apparatus of the present invention;

fig. 8 is a schematic view of an embodiment of the insertion device of the present invention in a catheter in a retracted state.

In the drawings, the symbols are described as follows:

FIG. 1: the device comprises a free end 1, a rectangular supporting frame 2, an upper closing structure 3, a middle section 4 and a lower closing structure 5;

FIG. 2: 3-1 parts of protrusions, 3-2 parts of grooves and 3-3 parts of pull wires;

FIG. 3: the groove 5-1, the protrusion 5-2 and the stay wire 5-3;

FIG. 4: a free end 7, a triangular support frame 8, an upper closure structure 9, a middle section 10, and a lower closure structure 11;

FIG. 5: a free end 12, an elliptical support frame 13, an upper closure structure 14, a middle section 15, a lower closure structure 16;

Detailed Description

The present invention will be described in further detail with reference to the drawings and the detailed description. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1:

referring to fig. 1, there is shown a retrievable intraluminal implantation instrument comprising a shape memory body constituted by two free ends, two rectangular support frames 2, an upper closing structure 3, an intermediate section 4, a lower closing structure 5.

The rectangular support frames 2 are used for changing the curvature radius of the blood vessel, one end of each support frame is connected with the free end, and the other end of each support frame is connected with the middle section 4, namely the two support frames 2 are connected through the middle sections 4.

Wherein the free ends and the middle section 4 may be substantially in line to ensure stability of the support frame structure, the rectangular support frame structure 2 being provided with an upper closure structure 3 and a lower closure structure 5, the opening or closing of the rectangular support frame 2 being achieved by operation of the closure structures 3 and 5.

The protrusion and the groove are arranged at the joint of the free end and the supporting frame or at the joint of the supporting frame and the middle section, and the protrusion and the groove can be mutually matched to form a closed frame structure after the apparatus is implanted into the lumen due to the shape memory of the deformation memory material product.

The shape memory can be deployed by being pulled in opposite directions, the upper and lower closing structures 3 and 5 of the two rectangular support frames 2 being opened simultaneously, the deployed shape memory can be approximately linear, for example, see the rod illustrated in fig. 8. The expanded shape memory may also be in the form of a rod having a wave shape.

The shape memory body has a reduced outer profile diameter by being deployed so that it can be removed from a large lumen. For example, the deployed shape memory shown in FIG. 8 may be placed into a delivery catheter having a smaller diameter to be delivered to the vicinity of the site in which the body is to be implanted, and by withdrawing the catheter without withdrawing the shape memory, the deployed shape memory may be released from the catheter to spontaneously deform and tend to return to its set memory shape, such as the shape shown in FIG. 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 closely contacting with the inner wall of the blood vessel, the diagonal length of the closed rectangular frame is larger than the diameter of the blood vessel at the implanted part, and the closed surface is perpendicular to the axial direction of the blood vessel at the implanted part is expected, because the curvature radius of the blood vessel is effectively changed. Referring to fig. 8, the effect of the changing radius of curvature of the vessel after implantation of the implantation instrument in the vessel is shown, with the vessel radius R1 flowing to R2, R2 > R1. The middle section 4 and the two free ends respectively play a role in orienting and limiting the two closed rectangular support frames 2. Thus, it is preferred that the plane of closure formed when the support frame 2 is closed is substantially perpendicular to the length of the intermediate section, but a small included angle is acceptable.

The two rectangular support frames 2 of the implantation instrument may be of the same size, as shown in fig. 1, for example, or of different sizes, as shown in fig. 6, for example. The skilled person can select the choice according to the anatomical physiological morphology of the blood vessel.

The implantation instrument may be implanted within the patient's blood vessel for a period of time, such as hours, days, or months, or longer periods may be allowed to effect a reduction in the patient's blood pressure. In some cases, the implantation instrument may be removed from the patient. Fig. 1 shows that when the implantation device is withdrawn from the implanted blood vessel, a delivery or withdrawal channel from the outside of the body to the implantation device position can be established by a delivery catheter, a restraint mechanism for withdrawal can be introduced into the channel, a free end of the implantation device close to the channel is restrained by the restraint mechanism, a pulling force is applied to the outside of the body to pull the implantation device to expand, thereby reducing the length of the implantation device along the radial direction of the blood vessel, and the implantation device is withdrawn into the delivery catheter while being expanded, and finally can be withdrawn from the body of the patient along with the delivery catheter.

The restraining mechanism may be a guide wire, for example, having a restraining unit such as a loop, hook, clip, etc. at its distal end, which may capture the proximal free end of the implant device.

The free end of this embodiment may be provided with a spherical knob which may have a larger diameter so as to be easily caught and bound by the binding unit. The spherical round head can also avoid the damage of the free end to the inner wall of the blood vessel and reduce the recovery resistance of the free end entering the recovery catheter. For example, the puncture of the inner wall tissue by a small offset puncture wound following the pulsation of a blood vessel or the impact of blood flow is avoided.

A further improvement may be provided based on this embodiment, wherein the free end may be provided with a head adapted to fit the restraining element for facilitating transport and retrieval of the device.

In addition, the free end can be provided with a developing mark, so that the positioning is convenient.

The closed structure in the implantation instrument of the present embodiment employs a combination of protrusions and grooves, as shown in fig. 2 and 3, a protrusion 3-1 and a groove 3-2 are disposed at the upper closed structure 3, a groove 5-1 and a protrusion 5-2 are disposed at the lower closed structure 5, and the protrusion and the groove have a matched size and shape, so that the protrusion can be stably inserted into the groove, and the formed closed rectangular supporting frame structure is shaped and stabilized, thereby preventing the rectangular supporting frame from being undesirably opened.

The free ends and intermediate sections of this embodiment are in the form of straight bars, however, may be provided in a curved form, such as an arc, as desired.

The intermediate section of this embodiment is located on the face of the closed faces of the two support frames where the outermost peripheral edges are located. The plane of the outermost periphery of the closed faces of the two support frames is understood to be the side of a cylinder with the two rectangular closed faces as top and bottom. The intermediate section shown in figure 1 of this embodiment is located on one of the aforementioned side surfaces. The middle section can not protrude out of two sides of the outermost periphery of the closed surfaces of the two support frames along the radial direction of the closed surfaces, the structure enables the middle section to be attached to the inner wall of a blood vessel when the middle section is implanted into the blood vessel, the functions of stabilizing the shape memory body and fixing the relative positions of the two support frames are achieved, and especially normal blood flow in the blood vessel cannot be influenced.

The shape memory material of the present invention may be selected from metallic or non-metallic materials having shape memory properties including, but not limited to, copper-zinc-aluminum-nickel alloys, copper-aluminum-nickel alloys, nickel-titanium alloys, zinc-copper-gold alloys, and block copolymers such as polyethylene terephthalate-polyethylene oxide, polystyrene-poly (1, 4-butadiene), poly (2-methyl-2-oxazoline) -polytetrahydrofuran, and the like. The preferred nickel-titanium alloy wire has good radial support performance and axial bending performance, and can ensure that the implant device has excellent elasticity after being released.

The surfaces of the supporting frames 2 contacting the vessel wall can all adopt the design of rounding off, and the frame edges are in smooth transition connection.

It will be appreciated that in other embodiments the number of support frames 2 may be 3 or more.

Example 2:

the present embodiment is substantially the same as embodiment 1, and for brevity of description, in the description process of the present embodiment, the technical features the same as those of embodiment 1 are not described again, but only the difference between the present embodiment and embodiment 1 is described, and the difference is that the upper closing structure 3 and the lower closing structure 5 are further provided with a set of magnetic components respectively, and the magnetic components attract each other, so that the closing of the closing structure can be strengthened, and the closing structure is more stable.

In the implantation instrument of example 1, in principle, the shape memory material product will return to the closed frame shape of the intended design due to its own shape memory. However, in view of the obstruction of the vessel wall and the uncertainty of the implantation procedure and the uncontrollable environment inside the vessel lumen, it may result in the closure structure not being positioned exactly and the closure of the support frame not being performed in one step.

Thus, in this embodiment, the additional magnetic component facilitates alignment and mating of the protrusion and recess after the implantation instrument is implanted in the vessel lumen, improving the stability of the support frame to close into a powered or closed configuration.

In this embodiment, the magnetic component may be a magnetic ring embedded in the deformation memory material.

It is clear that it is also possible to provide an embodiment where the upper closing structure 3 and the lower closing structure 5 are provided with only magnetic components, and not with a combination of reliefs and protrusions, although this may not be a preferred solution.

Example 3

On the basis of any of the above embodiments 1-3, the upper closing structure 3 or the lower closing structure 5 is further provided with a pull wire, which is pulled by the operator to provide additional assistance in closing the support frame.

One end of the pull wire can be fixed at one part of the closing structure component, such as a groove or a protrusion, and the other end is not fixed and is in a free state.

In another embodiment, the pull wire is an annular closed wire, a through hole is arranged at one position of the closed frame component, and one end of the closed wire penetrates through the through hole and then is closed with the other end of the closed wire so as to be fixed by the through hole.

The pull wire may be captured and secured using a similar restraining mechanism as previously described to apply traction to bring the two mating components of the closure structure together to ultimately form the closed support frame.

Wherein the closure thread is more easily caught by the tethering mechanism.

The pull-string may be selected from a material that is human absorbable, e.g., the pull-string may be absorbed or degraded after a certain period of implantation.

Example 4:

this embodiment is substantially the same as embodiment 1, and for the sake of brevity of description, in the description process of this embodiment, the technical features that are the same as those of embodiment 1 are not described again, and only the difference between this embodiment and embodiment 1 is explained, in which the frame structure 2 is a triangular structure, as shown in fig. 4.

Example 5:

this embodiment is substantially the same as embodiment 1, and for the sake of brevity of description, in the description process of this embodiment, the technical features the same as those of embodiment 1 are not described again, and only the difference between this embodiment and embodiment 1 is explained, in which the frame structure 2 is an elliptical structure, as shown in fig. 5.

Example 6

The embodiment provides a recyclable intraluminal implanting instrument implanting method, which comprises the following steps:

referring to fig. 8, prior to implantation, the instrument is in the condition shown in fig. 8;

the device is pushed to the part of the blood vessel to be treated by the catheter to be slowly released, and when the device is released, a free end of the device is pushed out of the catheter and contacts with the wall of the blood vessel firstly;

further releasing, when the support frame is pushed out of the conduit, the support frame returns to the state in the free state to form a structure to be sealed or a sealed structure;

the support frame is adjusted by the closing structure, so that the frame is more stable.

This example provides a method for retrieving a retrievable intraluminal implantable device, the retrieval process comprising:

applying a traction or other force to the free end to separate the protrusion and the recess from each other in the closed configuration; the support frame is opened;

further, removing the treatment delivery device from the blood vessel and retrieving it into the catheter;

the device is retracted into the catheter, the condition of which is shown in figure 8.

Because the instrument is provided with a free end, the instrument can be reliably connected with the conveying conduit, and the pushing and/or recovering functions are realized. The function of propelling movement is retrieved comparatively simply relatively, sets up the function that a push rod can realize the propelling movement in carrying the pipe. The push rod can have different structures, can be a solid rod, and can also be a hollow through pipe. The recovery function is realized in a more diversified manner, the main change lies in that the recovery structure of the catheter is connected with an adapter in a different manner, and the recovery structure of the catheter can be roughly divided into flexible connection and rigid connection, wherein the flexible connection comprises snare connection, hook connection and the like, and the rigid connection comprises buckle connection, threaded connection and the like. However, in either connection mode, the connection structure of the stent is firstly folded and then pulled into the sheath tube during the recovery process of the stent, and then the rest part of the stent is also pulled into the sheath tube.

The invention also provides application of the implantation device of the previous embodiments, such as implantation in an arterial blood vessel, and changing the curvature radius of the blood vessel, so as to achieve the effect of reducing hypertension of a patient.

As a preferred embodiment, the aforementioned implantation device may be implanted in the carotid sinus.

It is apparent that the implantation instrument of the embodiment of the present invention can also be used as a support device for a lumen, providing an increased lumen space for a narrow lumen, for example, to improve the throughput of blood flow in the lumen per unit time.

While the above detailed description of the retrievable intraluminal implantation device provided by the present invention has been described in terms of specific embodiments thereof, it will be appreciated that those skilled in the art, upon attaining an understanding of the present invention, may make numerous modifications thereto without departing from the spirit of the invention, and it is intended to cover such modifications as fall within the scope of the appended claims.

Claims (12)

1. A retrievable intraluminal implanting device, comprising a shape-changing memory body having two free ends, the single rod being configured along its length, at least two openable support frames having a closed configuration, the support frames being closed to form a closed plane substantially perpendicular to the length of the rod, the support frames being in a bent configuration between the free ends; the closed structure of the support frame can be opened by pulling the two free ends in opposite directions, the shape-changing memory tending to maintain the closed shape of the support frame in the unconstrained state.

2. The implantation instrument of claim 1, wherein the support frames are rectangular, triangular, elliptical, or other polygonal structures, wherein the two support frames are the same or different sizes.

3. The implantation instrument of claim 1, wherein the portion of the rod between the two support frames is a middle section that is located on a face of the closed faces of the two support frames on which the outermost peripheral edge is located.

4. An implantation instrument according to claim 3, wherein the intermediate section is of a straight rod configuration and is perpendicular to the closed faces of the two support frames.

5. The implantation instrument of claim 3, wherein the intermediate section is a non-closed arc-like structure.

6. An implantation instrument as claimed in any one of claims 1 to 5, wherein the closure formation is a projection and recess combination provided on two spatially adjacent parts of the rod, wherein the projection can be inserted into the recess to effect closure of the support frame and the projection can be pulled out of the recess to open the closed support frame.

7. An implanting instrument according to any of claims 1 to 5, wherein the closure mechanism is a combination of mutually attractive magnetic elements provided on two spatially adjacent portions of the rod, respectively.

8. The implanting instrument of claim 7, wherein the magnetic member is a magnetic ring embedded in the shaft.

9. The implantation instrument of claim 6 or 7, further comprising a pull wire secured at one of the components of the closure structure, the pull wire for pulling the two mating components of the closure structure together.

10. The implantation instrument of claim 9, wherein the pull wire is an absorbable wire.

11. Use of an implant device according to any one of claims 1 to 10 as a medical device for the treatment of hypertension.

12. Use of an implant device according to any one of claims 1-10 for implanting a medical device as a carotid sinus.

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