CN107714239B

CN107714239B - Fastener and fastening system

Info

Publication number: CN107714239B
Application number: CN201711101299.XA
Authority: CN
Inventors: 杨凡; 徐靖; 李强; 李飞; 刘颖; 寇云腾; 董永贺
Original assignee: Beijing Huamai Taike Medical Instrument Co ltd
Current assignee: Beijing Huamai Taike Medical Instrument Co ltd
Priority date: 2017-11-09
Filing date: 2017-11-09
Publication date: 2022-03-18
Anticipated expiration: 2037-11-09
Also published as: CN107714239A

Abstract

The invention provides a fixer and a fixing system, belonging to the field of medical equipment. The fixing system comprises a fixer, a conveying unit and an adjusting unit. This fixer can carry and enter into and treat fixed position department and pin the fixer on the vascular wall, accomplishes the fastening of support and vascular wall, with the gap closure between support tectorial membrane and the vascular wall, has improved the adherence of support tectorial membrane, has promoted the anchoring force between support and the vascular wall simultaneously, prevents that the support from taking place to shift.

Description

Fastener and fastening system

Technical Field

The invention relates to the field of medical equipment, in particular to a fixator and a fixing system.

Background

The aortic dissection or aneurysm is a vascular disease which is extremely dangerous clinically, has great threat to the life of a patient, is mainly caused by hypertension, arteriosclerosis, injury, infection and other reasons, causes the aorta to have limited dilatation, and slowly presents a tumor sample under the impact of high-pressure blood flow. The aorta is expanded for a long time, the vessel wall becomes very fragile, rupture is very easy to occur, once the aneurysm ruptures, a large amount of bleeding is caused, and the name of a bomb in a human body is listed as one of 10 life diseases in European and American countries. With the increasing aging of population, the improvement of people's living standard and the continuous improvement of medical standard, the incidence and detection rate of the interlayer and aneurysm have been on the rising trend year by year. At present, surgical treatment methods mainly comprise open surgery, hybrid surgery and intracavity repair treatment.

The intracavity repair treatment is to push the conveying system loaded with the covered stent to the diseased part through the incision of the aorta far end, such as the femoral artery of a human body, the stent is unfolded to isolate the diseased artery, and a blood transportation channel is reconstructed, so that the pressure of the aneurysm body is reduced, and the treatment purpose is achieved. The intracavity repair belongs to complete interventional therapy, does not need to open the chest and open the abdomen, and has the advantages of small surgical wound, short surgical time, quick postoperative recovery and the like compared with open therapy and hybrid surgery. Since the 90 s of the 20 th century, the advent and development of minimally invasive, intraluminal repair therapies has gradually replaced open surgical procedures as the surgical preference for the treatment of dissections and aneurysms.

The inventor finds in research that the traditional operation for treating the dissecting layer and the aneurysm has at least the following disadvantages:

the aortic dissection and aneurysm in interventional therapy still have not enough, and the support is attached to the human blood vessel inside through the autologous elasticity after the release, has the risk of interior hourglass and support aversion under the effect of high pressure, high-speed blood flow impact. The endoleak and/or the stent displacement may cause that the tumor body cannot be reduced or continuously increases after the operation, so that the interventional operation cannot achieve the expected treatment effect and even endangers the life of the patient;

in the case of internal leakage or stent migration, it is currently common practice to implant a stent again at the proximal end of the original stent. However, this method has many disadvantages, for example, the re-implanted stent has many unstable factors due to poor anchoring conditions, the long-term operation effect is to be evaluated, and due to the branched blood vessels at the proximal end of the stent, the re-implantation of a new stent may not have enough anchoring regions to block endoleaks by the new stent.

Disclosure of Invention

The invention aims to provide a fixer to solve the problems of internal leakage and stent displacement after traditional operation for treating dissections and aneurysms.

The invention aims to provide a fixing system to solve the problems of internal leakage and stent displacement after traditional operation for treating dissections and aneurysms.

The embodiment of the invention is realized by the following steps:

in view of the first object, the present invention provides a fixer, including:

at least one three-dimensional helical fixation arm having an insertion end and a drive end along its length, an

The transmission arm is installed on the transmission end, and the projection of the transmission arm along the central axis direction of the three-dimensional spiral fixing arm falls into the area surrounded by the three-dimensional spiral fixing arm.

In a preferred embodiment of the present invention, two three-dimensional spiral fixing arms are provided, central axes of the two three-dimensional spiral fixing arms are collinear, and two driving ends of the two three-dimensional spiral fixing arms are connected to the driving arm, so that the fixing device is in a double-spiral structure.

In a preferred embodiment of the present invention, an outer contour of the three-dimensional spiral fixing arm is cylindrical, truncated cone-shaped, or conical.

In view of the above second object, the present invention provides a fixing system, comprising an adjusting unit, a conveying unit and the fixing device,

the adjusting unit comprises a bending adjusting sheath tube,

the conveying unit comprises a container and a driving assembly, the container is provided with a mounting hole, the inner wall of the mounting hole is provided with a thread groove, the fixer is matched with the thread groove, and the driving mechanism is used for enabling the fixer to rotate relative to the container and enabling the fixer to slide in a reciprocating manner along the central axis direction of the container;

the container is movably arranged in the bending adjusting sheath in a penetrating way.

In a preferred embodiment of the present invention, the driving assembly includes a shifting fork, an outer sheath tube and a torque transmission cable, one end of the torque transmission cable is connected to the shifting fork, the shifting fork is connected to the transmission arm in a transmission manner, and the torque transmission cable rotates to drive the shifting fork to rotate, so that the holder rotates relative to the accommodating device;

the outer sheath pipe is sleeved outside the torque transmission cable, one end of the outer sheath pipe is connected to the container, and the outer sheath pipe is movably arranged in the bending adjusting sheath pipe in a penetrating mode.

In a preferred embodiment of the present invention, the shift fork includes a torque transmission portion and a limiting portion, an end surface of the limiting portion is a connection surface, the torque transmission portion is mounted on the connection surface, a projection of the torque transmission portion on the limiting portion along a central axis direction thereof is located in the connection surface, the torque transmission portion has a clamping plane and a clamping arc surface, the clamping plane and the connection surface form a clamping groove for accommodating the transmission arm, and the torque transmission cable is mounted at an end of the limiting portion away from the torque transmission portion.

In a preferred embodiment of the present invention, the torque transmission cable includes at least two layers, the adjacent torque transmission cables are inserted and fixed, each layer of the torque transmission cable is formed by braiding a plurality of filaments along the same rotation direction, and the rotation directions of the adjacent torque transmission cables are different.

In a preferred embodiment of the present invention, the container has an abutting end and a connecting end along a central axis direction thereof, the abutting end has an annular end surface, the annular end surface is provided with at least one groove, and a groove depth direction of the at least one groove extends from the abutting end to the connecting end along the central axis direction of the container.

In a preferred embodiment of the present invention, the bending-adjusting sheath tube includes a sheath tube main body, a pulling wire and an adjusting handle, the pulling wire is movably disposed in a tube wall of the sheath tube main body, one end of the pulling wire is fixed to an end portion of the sheath tube main body far away from the adjusting handle, the other end of the pulling wire is mounted on the adjusting handle, and the adjusting handle is configured to drive the pulling wire to slide so as to bend the sheath tube main body.

In a preferred embodiment of the invention, the adjusting handle comprises an outer cylinder, an inner cylinder, a screwing cylinder and a sliding block, the inner cylinder is provided with a sliding groove, the sliding block is sleeved outside the inner cylinder and is provided with a clamping part inserted in the sliding groove, the outer cylinder is sleeved outside the inner cylinder and is connected with the inner cylinder, and an annular mounting space is formed between the outer cylinder and the inner cylinder, the screwing cylinder comprises a transmission cylinder part and a screwing cylinder part, the transmission cylinder part is positioned in the annular mounting space, a thread groove is arranged on the cylinder wall of the transmission cylinder part, the peripheral surface of the sliding block is provided with teeth matched with the thread groove of the transmission cylinder part, the screwing cylinder part is sleeved outside the inner cylinder, the screwing cylinder part rotates to drive the transmission cylinder part to rotate, and the traction wire is installed on the sliding block.

The embodiment of the invention has the beneficial effects that:

in summary, the embodiment of the invention provides a fixator, which is simple and reasonable in structure, convenient to manufacture and process, and convenient to install and use, and meanwhile, the fixator can be conveyed to a position to be fixed and can be pinned on a blood vessel wall, so that the stent is fastened with the blood vessel wall, a gap between a stent coating and the blood vessel wall is closed, the adherence of the stent coating is improved, the anchoring force between the stent and the blood vessel wall is improved, and the displacement of the stent is prevented. The method comprises the following specific steps:

the fixer that this embodiment provided, including three-dimensional spiral fixed arm and drive arm, three-dimensional spiral fixed arm has along its length direction and inserts the end and drive end, and drive end department is connected drive arm and three-dimensional spiral fixed arm. In the use, the fixer passes through conveyor and carries to the vascular wall and the fixed position department of treating of support, passes through the drive arm with outside torsion and transmits for three-dimensional spiral fixed arm, and three-dimensional spiral fixed arm rotates in-process can the screw in vascular wall, fixes the support on the vascular wall. In the operation process, the fixator can be used for reinforcing at a plurality of positions of the stent as required, the operation is flexible and reliable, the adherence performance and the anchoring performance of the stent covering membrane are greatly improved, and the intra-type post-operation I-shaped internal leakage and the stent displacement are effectively prevented.

The fixing system provided by the embodiment comprises the fixator, can deliver the fixator to the position to be anchored of the stent and the blood vessel wall and anchor the fixator on the blood vessel wall, and has all the advantages of the fixator.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a fastener according to an embodiment of the present invention;

FIG. 2 is a schematic view of a modified structure of the anchor according to the embodiment of the present invention;

FIG. 3 is a schematic view of a fastening system according to an embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3;

FIG. 5 is a cross-sectional view of an adjustment unit of the binding system according to an embodiment of the invention;

FIG. 6 is a schematic view of a portion of an adjustment unit of the binding system according to an embodiment of the present invention;

FIG. 7 is a schematic view of a receptacle of a fastening system according to an embodiment of the present invention;

FIG. 8 is a schematic view of a yoke of a fastening system according to an embodiment of the present invention;

FIG. 9 is a schematic view of an application of the fastening system according to the embodiment of the present invention;

FIG. 10 is a schematic view of a stent graft with endoleak defects between the stent graft and the vessel wall;

FIG. 11 is a schematic view of anchoring between the stent graft and the vessel wall using a fixation device;

FIG. 12 is a schematic view of a torque transmitting cable according to an embodiment of the present invention.

Icon: 100-a holder; 110-a three-dimensional spiral fixed arm; 111-an insertion end; 120-a drive arm; 200-a regulating unit; 210-bending a sheath tube; 211-sheath body; 212-a traction wire; 213-adjusting handle; 214-an outer barrel; 215-inner cylinder; 2151-chute; 216-a screw-on cartridge; 2161-drive cylinder part; 2162-screwing barrel; 217-a slide block; 2171-snap-fit portion; 300-a conveying unit; 310-a container; 311-mounting holes; 312-a groove; 313-a connector; 320-shifting fork; 321-a torque transmission part; 322-a limiting part; 323-annular limit projection; 324-a card slot; 330-sheath canal; 340-a torque transfer cable; 350-a delivery handle; 400-vessel wall; 500-stent covering film.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Examples

Referring to fig. 1, the present embodiment provides a stent 100 for anchoring a stent to a vessel wall 400 after an operation for interventional therapy of aortic dissection and aneurysm, which effectively prevents the occurrence of type I endoleak and stent migration; in addition, in the event that a type I endoleak has occurred, the use of the fixation device 100 anchors the stent to the vessel wall 400 at the site of the endoleak for remedy and improvement.

In this embodiment, the fixing device 100 includes a driving arm 120 and at least one three-dimensional spiral fixing arm 110, two ends of the three-dimensional spiral fixing arm 110 along the length direction thereof are an insertion end 111 and a driving end, respectively, the insertion end 111 is a tip, and the insertion end 111 may be a conical tip, a rhombus tip (e.g., a rhombus pyramid), or a wedge-shaped tip. When anchoring, the stent is inserted into the stent graft 500 and the vessel wall 400 in this order by the insertion end 111, thereby anchoring the stent to the vessel wall 400.

Alternatively, the outer profile of the three-dimensional spiral fixing arm 110 may be cylindrical, conical or frustoconical.

The driving arm 120 is cylindrical, one end of the driving arm 120 is connected to the driving end, a projection of the driving arm 120 along the central axis direction of the three-dimensional spiral fixing arm 110 falls into an area surrounded by the three-dimensional spiral fixing arm 110, and optionally, the driving arm 120 is perpendicular to the central axis of the three-dimensional spiral fixing arm 110.

Referring to fig. 2, in another embodiment, two three-dimensional spiral fixing arms 110 are provided, two driving ends of the two three-dimensional spiral fixing arms 110 are respectively connected to two ends of the driving arm 120, the two three-dimensional spiral fixing arms 110 are coaxially disposed, and meanwhile, the two three-dimensional spiral fixing arms 110 are located on the same side of the driving arm 120, and the fixator 100 forms a double-spiral structure. The double-helix structured fixator 100 has a larger helix angle and a larger thread pitch, and a smaller rotation angle is required in the release process, so that the release is more convenient.

In this embodiment, the fixator 100 may be made of medical stainless steel, cobalt-based alloy, titanium alloy, or other metal materials by machining to form a single-helix or double-helix structure, and the insertion end 111 thereof is machined to be conical, wedge-shaped, or three (more) prismatic pointed shape, so as to facilitate the puncture of the stent coating 500 and the blood vessel wall 400 during the release process, close the gap between the stent coating 500 and the blood vessel wall 400, improve the adherence of the stent coating 500, and simultaneously improve the anchoring force between the stent and the blood vessel wall 400, thereby preventing the stent from shifting. Meanwhile, the condition that I-type internal leakage occurs can be repaired.

It should be noted that the holder 100 may be formed by bending an elongated workpiece.

Examples

Referring to fig. 3 to 9, the present embodiment provides a fixing system, which includes an adjusting unit 200, a conveying unit 300, and the above-mentioned embodiment of the fixing device 100.

Referring to fig. 3, 5 and 6, the adjusting unit 200 includes a bending-adjusting sheath 210, the bending-adjusting sheath 210 includes a sheath main body 211, a pulling wire 212 and an adjusting handle 213, the pulling wire 212 is disposed in a wall of the sheath main body 211, one end of the pulling wire 212 is fixed to an end of the sheath main body 211 away from the adjusting handle 213, the other end of the pulling wire 212 is mounted on the adjusting handle 213, and the adjusting handle 213 is used for driving the pulling wire 212 to slide to bend the sheath main body 211. The adjusting handle 213 comprises an outer cylinder 214, an inner cylinder 215, a screwing cylinder 216 and a sliding block 217, wherein a sliding groove 2151 is formed in the inner cylinder 215, the sliding block 217 is sleeved outside the inner cylinder 215, the sliding block 217 is provided with a clamping portion 2171 inserted in the sliding groove 2151, the outer cylinder 214 is sleeved outside the inner cylinder 215, the outer cylinder 214 is connected with the inner cylinder 215, an annular installation space is formed between the outer cylinder 214 and the inner cylinder 215, the screwing cylinder 216 comprises a transmission cylinder portion 2161 and a screwing cylinder portion 2162, the transmission cylinder portion 2161 is located in the annular installation space, a thread groove is formed in the cylinder wall of the transmission cylinder portion 2161, teeth matched with the thread groove of the transmission cylinder portion 2161 are arranged on the outer peripheral surface of the sliding block 217, the screwing cylinder portion 2162 is sleeved outside the inner cylinder 215, the screwing cylinder portion 2162 rotates to drive the transmission cylinder portion 2161 to rotate, and the traction wire 212 is installed on the sliding block 217. When the sheath tube main body 211 is used, the outer cylinder 214 is held, the screwing cylinder 216 is rotated, the screwing cylinder 216 rotates relative to the inner cylinder 215, the screwing cylinder 216 is in threaded connection with the sliding block 217, the sliding block 217 is in circumferential limited connection with the inner cylinder 215, namely the sliding block 217 and the inner cylinder 215 cannot rotate relatively, the screwing cylinder 216 rotates relative to the sliding block 217, the sliding block 217 slides along the inner cylinder 215, tensioning and loosening of the traction wire 212 are achieved, and bending of the sheath tube main body 211 is further achieved.

It should be noted that the bending sheath 210 may also be implemented by the prior art.

Referring to fig. 3, 4, 7 and 8, the delivery unit 300 includes a receiver 310 for receiving the anchor 100 and a driving assembly for transmitting torque to the anchor 100 to rotate the anchor 100 relative to the receiver 310, wherein the anchor 100 punctures the stent coating 500 and the vessel wall 400 and anchors the stent and the vessel wall 400 during screwing.

In this embodiment, the container 310 is cylindrical, the container 310 is provided with a circular mounting hole 311, the mounting hole 311 is a through hole penetrating through two end surfaces of the container 310 along a central axis direction of the container 310, an inner wall of the mounting hole 311 is provided with a thread groove, a thread pitch of the thread groove is equal to a thread pitch of the three-dimensional spiral fixing arm 110 of the fixator 100, that is, the fixator 100 can be screwed in the thread groove. The anchor 100 can be released from one end of the holder 310 and anchored to the vessel wall 400 during rotation of the anchor 100 relative to the holder 310. Two terminal surfaces of container 310 are annular terminal surfaces, container 310 has butt end and link along its central axis direction, be provided with at least one recess 312 on the annular terminal surface of butt end, at least one recess 312 is arranged around the axis of container 310, the groove depth direction of every recess 312 extends to the link by the butt end along the axis direction of container 310, and further, every recess 312 is logical groove, and every recess 312 extends to on the inner wall and the outer wall of container 310 respectively along the radial direction's of container 310 both ends. Due to the structural design, after the abutting end of the container 310 abuts against the stent covering membrane 500, the friction force generated when the container 310 contacts with the stent covering membrane 500 can be increased, the fixator 100 is effectively prevented from rotating in the releasing process, the operation time is shortened, and the fixing efficiency is improved. A hollow connection head 313 is arranged at the connection end of the container 310, the connection head 313 is cylindrical, and the outer diameter of the connection head 313 is smaller than that of the container 310.

The driving assembly comprises a shifting fork 320, an outer sheath 330, a torque transmission cable 340 and a conveying handle 350, one end of the torque transmission cable 340 is connected with the shifting fork 320, the other end of the torque transmission cable 340 is connected with the conveying handle 350, the conveying handle 350 transmits torque to the shifting fork 320 through the torque transmission cable 340, the shifting fork 320 is in transmission connection with the transmission arm 120, and the torque transmission cable 340 rotates to drive the shifting fork 320 to rotate so that the fixer 100 rotates relative to the container 310; the outer sheath 330 is sleeved outside the torque transmission cable 340 to protect the cable, one end of the outer sheath 330 is connected to the container 310, optionally, the outer sheath 330 is sleeved outside the connector 313, the other end of the outer sheath 330 is mounted on the handle, and the outer sheath 330 is movably arranged in the bending adjusting sheath 210.

Optionally, the shifting fork 320 includes a torque transmission portion 321 and a limiting portion 322, an end surface of the limiting portion 322 is a connection surface, the torque transmission portion 321 is located in the connection surface along a projection of the central axis direction of the torque transmission portion on the limiting portion 322, the torque transmission portion 321 has a clamping plane and a clamping arc surface, the clamping plane and the connection surface form a clamping groove 324 for accommodating the transmission arm 120, and the torque transmission cable 340 is installed at one end of the limiting portion 322, which is far away from the torque transmission portion 321. During installation, torque transmission portion 321 is inserted into fixer 100, transmission arm 120 is clamped in clamping groove 324, transmission arm 120 is circumferentially limited with shifting fork 320 through a clamping plane and a clamping arc surface, shifting fork 320 can drive fixer 100 to rotate relative to container 310 in the rotating process, and release of fixer 100 is achieved.

It should be further noted that the outer peripheral surface of the limiting portion 322 is provided with an annular limiting protrusion 323, the annular limiting protrusion 323 is used for limiting the shifting fork 320 to slide towards the accommodating device 310, when the shifting fork 320 is installed, the limiting of the position of the shifting fork 320 is realized through the annular limiting protrusion 323, the shifting fork 320 is not easy to contact with the stent covering film 500, and the surgical process is safer and more reliable.

It should be noted that the torque transmission cable 340 may be woven from multiple filaments or made from a single metal wire, and has a certain torsional rigidity to transmit the torque generated at the position of the delivery handle 350 to the fork, and a certain flexibility to pass through the tortuous artery and the bending sheath 210. Referring to fig. 12, optionally, the torque transmission cable is a multilayer structure, each layer is a cylinder formed by weaving a plurality of strands of filaments with the same rotation direction, adjacent layers are spliced and fixed by cables, the rotation directions of adjacent layers of cables are different, the cables are not easy to loosen during torque transmission, the torque response of the cables is very sensitive during forward rotation or reverse rotation, and the torque transmission efficiency is improved. For example, two layers, three layers, etc. can be designed.

Referring to fig. 9, in use, the fixation system first makes a puncture or a longitudinal incision at the femoral artery, implants the bending sheath 210 through the guide wire and withdraws the guide wire, and then adjusts the angle and position of the end (proximal end) of the bending sheath 210 near the vessel wall 400, so that the proximal end of the bending sheath 210 is approximately perpendicular to the stent and the vessel wall 400 and aligned with the position where the fixator 100 is to be released, thereby establishing a pathway for implantation of the intravascular fixator 100.

Then carry the fixer 100 to its position of treating the release through the route of transferring the bent sheath pipe 210 and establishing, through carrying handle 350, make moment of torsion transmission cable 340 drive the shift fork and rotate, the shift fork drives fixer 100 and screws out the container 310 and realizes the release, advances pinning with support tectorial membrane 500 and vascular wall 400.

It should be noted that, the fixing system provided in this embodiment may deliver one or more of the plurality of the fixing devices 100 to the position to be anchored and release the fixing device perpendicular to the vessel wall 400, and the fixing device 100 may tightly pin the endovascular graft and the vessel inner wall together after releasing, so as to effectively improve the anchoring of the stent, and improve or restore the adherence of the stent coating 500, so as to improve the I-type endoleak and the stent displacement caused by the poor adherence of the stent.

In the actual operation, after releasing one of the fasteners 100 is completed, the outer sheath 330, the container 310 and the fork 320 are withdrawn from the body, a new fastener 100 is loaded at the position of the container 310 again, the position of the proximal end of the bent sheath is adjusted, the implantation of the completed fastener 100 is completed, and the operation is repeated, so that the implantation of a plurality of fasteners 100 is completed.

Referring to fig. 10-11, in addition, for the endovascular aneurysm repair treatment without the solution provided in this embodiment, if an I-type endoleak has occurred after the operation, the repair can be remedied and improved by implanting the fixture 100. The fixer 100 is released at the position where the inner leakage occurs and is vertical to the inner wall of the stent and the blood vessel, so that the gap between the stent and the blood vessel wall 400 is closed, and the inner leakage caused by poor adherence of the stent is improved or eliminated.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixing system is characterized by comprising an adjusting unit, a conveying unit and a fixer, wherein the fixer comprises at least one three-dimensional spiral fixing arm and a transmission arm, the three-dimensional spiral fixing arm is provided with an inserting end and a transmission end along the length direction of the three-dimensional spiral fixing arm, the transmission arm is installed on the transmission end, and the projection of the transmission arm along the central axis direction of the three-dimensional spiral fixing arm falls into an area surrounded by the three-dimensional spiral fixing arm;

the adjusting unit comprises a bending adjusting sheath pipe;

the conveying unit comprises a container and a driving assembly, the container is provided with a mounting hole, the inner wall of the mounting hole is provided with a thread groove, the fixer is matched with the thread groove, and the driving assembly is used for enabling the fixer to rotate relative to the container and enabling the fixer to slide in a reciprocating mode along the central axis direction of the container; the driving assembly comprises a shifting fork, an outer sheath tube and a torque transmission cable, one end of the torque transmission cable is connected with the shifting fork, the shifting fork is connected with the transmission arm in a transmission manner, and the torque transmission cable rotates to drive the shifting fork to rotate so as to enable the fixer to rotate relative to the container; the shifting fork comprises a torque transmission part and a limiting part, one end face of the limiting part is a connecting face, the torque transmission part is installed on the connecting face, the torque transmission part is located in the connecting face along the projection of the torque transmission part on the limiting part in the direction of the central axis, the torque transmission part is provided with a clamping plane and a clamping arc face, the clamping plane and the connecting face form a clamping groove for accommodating the transmission arm, and a torque transmission cable is installed at one end, far away from the torque transmission part, of the limiting part; the torque transmission cable comprises at least two layers, the adjacent torque transmission cables are fixedly inserted and connected, each layer of the torque transmission cable is formed by weaving multiple wires along the same rotation direction, and the rotation directions of the adjacent torque transmission cables are different;

the outer sheath pipe is sleeved outside the torque transmission cable, one end of the outer sheath pipe is connected to the container, and the outer sheath pipe is movably arranged in the bending adjusting sheath pipe in a penetrating mode;

2. The fixing system according to claim 1, wherein two three-dimensional spiral fixing arms are provided, central axes of the two three-dimensional spiral fixing arms are collinear, and two driving ends of the two three-dimensional spiral fixing arms are connected with the driving arms, so that the fixing device is in a double-spiral structure.

3. The securement system of claim 1, wherein the outer profile of said three-dimensional helical securement arm is cylindrical, frustoconical, or conical.

4. The fastening system according to any one of claims 1 to 3, wherein the receptacle has an abutting end and a connecting end along a central axis thereof, the abutting end having an annular end surface, the annular end surface being provided with at least one groove, a depth of the at least one groove extending from the abutting end to the connecting end along the central axis of the receptacle.

5. The fixation system according to any one of claims 1 to 3, wherein the bending sheath comprises a sheath body, a pulling wire movably disposed in a wall of the sheath body, one end of the pulling wire being fixed to an end of the sheath body away from the adjusting handle, and an adjusting handle, the other end of the pulling wire being mounted on the adjusting handle, the adjusting handle being configured to drive the pulling wire to slide to bend the sheath body.

6. The fixation system of claim 5, wherein the adjustment handle comprises an outer barrel, an inner barrel, a twist barrel, and a slider, the inner cylinder is provided with a sliding groove, the sliding block is sleeved outside the inner cylinder and is provided with a clamping part inserted in the sliding groove, the outer cylinder is sleeved outside the inner cylinder and is connected with the inner cylinder, and an annular mounting space is formed between the outer cylinder and the inner cylinder, the screwing cylinder comprises a transmission cylinder part and a screwing cylinder part, the transmission cylinder part is positioned in the annular mounting space, a thread groove is arranged on the cylinder wall of the transmission cylinder part, the peripheral surface of the sliding block is provided with teeth matched with the thread groove of the transmission cylinder part, the screwing cylinder part is sleeved outside the inner cylinder, the screwing cylinder part rotates to drive the transmission cylinder part to rotate, and the traction wire is installed on the sliding block.