CN114191025B

CN114191025B - Embolic system detachment device

Info

Publication number: CN114191025B
Application number: CN202111562854.5A
Authority: CN
Inventors: 田立剑; 苏宏东; 王英平; 张汝翔; 丁华芳
Original assignee: Shandong Weixin Medical Equipment Co ltd
Current assignee: Shandong Weixin Medical Equipment Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2023-05-09
Anticipated expiration: 2041-12-20
Also published as: CN114191025A

Abstract

The invention discloses an embolic system separation device which comprises a spring ring, a pushing rod provided with an internal cavity and a release mechanism, wherein the release mechanism comprises a macromolecule silk thread, a cutting line, a locking piece and a distal connecting ring, the proximal end of the spring ring is fixedly connected with the spring ring connecting piece, the distal connecting ring and the locking piece are arranged between the spring ring connecting piece and the pushing rod, the distal end of the locking piece is fixedly connected with the distal connecting ring, the proximal end of the locking piece is fixedly connected with the pushing rod, the proximal end face of the locking piece is provided with a left clamping slot and a right clamping slot which are open towards the internal cavity of the pushing rod, the distal end face of the distal connecting ring is in contact with the proximal end face of the spring ring connecting piece, the macromolecule silk thread is penetrated into the spring ring and is clamped with the locking piece through the macromolecule silk thread, the cutting line is penetrated into the internal cavity of the pushing rod, and the macromolecule silk thread is struggled through the cutting line.

Description

Embolic system detachment device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an embolism system separation device.

Background

The stroke is classified into hemorrhagic stroke and ischemic stroke, and intracranial aneurysms are a high-morbidity and high-mortality hemorrhagic stroke disease. The most widely used treatment scheme for clinical treatment at present is to perform spring coil embolism on the aneurysm by adopting interventional treatment, so that the rupture hemorrhage of the aneurysm is prevented.

In the interventional procedure of coil embolization of aneurysms, coils of different sizes, different three-dimensional or two-dimensional shapes, are required to be delivered into the body until the springs in the body can densely tamp the entire aneurysm. Clinically, several to more than ten spring coils are usually required for each aneurysm interventional operation to complete dense filling of the aneurysm. The step of conveying, placing, releasing and withdrawing the push rod is needed for the filling of each spring ring, and the operation time of the conveying, placing and releasing steps is determined according to the establishment condition of a channel, the clinical operation level of a doctor and the like, and the release time of the spring ring can influence the whole operation time.

Currently, the spring coil release modes include three main modes of hydrolysis release, electrolysis release and mechanical release. Wherein, the hydrolysis spring coil has poor control and less clinical application; most of electrolytic release coils used in clinic have the problems of overlong release time or unstable release time, so that the operation time is prolonged, pain of patients is increased, and the use is limited; the mechanical release spring ring is a main stream gradually due to the characteristics of quick release and simple operation, and becomes a main research direction in the industry.

Through retrieval, CN2019114231131 discloses a mechanical release spring ring system, which comprises a push rod, a spring ring and a connecting piece, wherein the connecting piece is connected to the distal end of the push rod, the spring ring is sleeved on the connecting piece, a hook is arranged on the push rod, a collar capable of being sleeved on the hook is arranged at the proximal end of the connecting piece, a traction guide wire is positioned in the push rod, and a pull ring capable of being sleeved on a connecting component is arranged at the distal end of the traction guide wire; when pushing in a blood vessel, the lantern ring passes through the pull ring, the lantern ring is sleeved on the hook, the spring ring is fixed on the far end of the pushing rod through the connecting piece, the pushing rod is pushed or retracted, and the pushing rod can drive the spring ring to advance or retract; after the spring ring enters the aneurysm, the pulling guide wire is pulled, the pull ring on the pulling guide wire pulls the lantern ring, the lantern ring falls off from the hook, acting force is lost between the pull ring and the lantern ring, the connecting piece rebounds to the spring ring towards the distal end under the action of spring ring elasticity, the spring ring is not connected with the push rod any more, and the release of the spring ring is realized.

The defects of the method are that: firstly, because the traction guide wire and the connecting piece are extremely fine, the pull ring is arranged at the far end of the traction guide wire, the lantern ring is arranged at the near end of the connecting piece, the processing is inconvenient, meanwhile, the lantern ring also passes through the pull ring, and then the lantern ring is hung on the hook, so that the operation difficulty is high, and the manufacturing cost is increased; secondly, the traction guide wire and the connecting piece are thin and soft, when the traction guide wire and the connecting piece are released, the pull ring is pulled, so that the lantern ring can be tightly sleeved on the hook, the lantern ring can not be released from the hook, the possibility of releasing the spring ring is extremely high, and the operation risk is increased; thirdly, after the lantern ring is released from the hook, the lantern ring and the pull ring are still in a sleeved state, the pull guide wire is pulled, the aperture of the pull ring is tightened, the pull ring becomes long, the lantern ring is not easy to release from the aperture of the pull ring, the spring ring release time is prolonged, the possibility that the pull ring and the lantern ring cannot be released is high, and the spring ring release failure is caused; fourthly, when the pull ring is pulled to separate the lantern ring from the pull ring, the pull ring and the lantern ring are not easy to be separated, and a part of the spring ring is pulled out of the aneurysm with great probability, so that the spring ring is left in the blood vessel; fifthly, when the pull ring is pulled backwards, the pull ring moves backwards with the lantern ring, the connecting piece moves backwards with the spring ring, and the spring ring enters the inner cavity of the push rod, so that the spring ring is released and fails.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides the embolic system separation device which has the advantages of simple structure, convenient operation and short release time.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides an embolism system separator, includes spring coil, push rod and the tripping device who is equipped with inside cavity, its characterized in that: the release mechanism comprises a polymer silk thread, a cutting line, a locking piece and a distal connecting ring, wherein the proximal end of the spring ring is fixedly connected with the spring ring connecting piece, the distal connecting ring and the locking piece are arranged between the spring ring connecting piece and the pushing rod, the distal end of the locking piece is fixedly connected with the distal connecting ring, the proximal end is fixedly connected with the pushing rod, a left clamping slot and a right clamping slot with openings facing to the cavity inside the pushing rod are formed in the proximal end face of the locking piece, and the distal end face of the distal connecting ring is in contact with the proximal end face of the spring ring connecting piece;

the novel high-molecular wire is characterized in that a high-molecular wire is arranged in the spring ring in a penetrating manner and consists of a first wire segment, a second wire segment and a wire connecting segment, the first wire segment and the second wire segment are respectively and fixedly connected with the spring ring, the proximal end of the first wire segment extends out of the spring ring, a spring ring connecting piece and a distal end connecting ring and is connected with the right end of the wire connecting segment, the proximal end of the second wire segment extends out of the spring ring, the spring ring connecting piece and the distal end connecting ring and is connected with the left end of the wire connecting segment, the wire connecting segment penetrates through a left clamping wire slot and a right clamping wire slot, and the spring ring is clamped with the locking piece through the high-molecular wire;

the cutting line is arranged in the inner cavity of the pushing rod in a penetrating way, the cutting line is arranged along the axial direction of the pushing rod and consists of a first cutting line segment, a second cutting line segment and a cutting line connecting segment, the cutting line connecting segment penetrates through the first wire segment and the second wire segment, the cutting line connecting segment and the wire connecting segment are arranged in a crossing way and are not contacted with each other, the right end of the cutting line connecting segment is connected with the far end of the first cutting line segment, the left end of the cutting line connecting segment is connected with the far end of the second cutting line segment, and the near ends of the first cutting line segment and the second cutting line segment extend out of the inner cavity of the pushing rod; through setting up cutting line and polymer silk thread and alternately setting, in the aneurysm is delivered to the spring coil, the proximal end at the push rod outwards pulls the cutting line, the cutting line link of cutting line and polymer silk thread contact and struggle the silk thread link of polymer silk thread, realize the release of releasing of spring coil, outwards pull the push rod again, shift out the blood vessel with the push rod, can be successful realize the mechanical release of spring coil and push rod, and a structure is simple, and an operation is convenient, release time is short, very big reduction operation time, reduce the operation risk, through setting up distal end go-between, the spring coil connecting piece is in contact with the distal end go-between, the spring coil is when pulling the cutting line struggle the polymer silk thread after entering the aneurysm, prevent that the spring coil from being driven the back under the effort of cutting line or pulling out the aneurysm, can effectively prevent that the spring coil from producing the displacement when releasing, further ensure the precision and the success rate that the spring coil releases, the cooperation of spring coil connecting piece and distal end go-between, also can ensure the stability of spring coil in the delivery process, guarantee that the silk thread link can block in the card slot and right side slot all the time in the delivery process.

The locking piece comprises a push rod connecting section, a left clamping line section and a right clamping line section, wherein the far end of the push rod connecting section is fixedly connected with a far end connecting ring, the near end of the push rod connecting section is fixedly connected with the push rod, the left end of the push rod connecting section is fixedly connected with the left clamping line section, the right end of the push rod connecting section is fixedly connected with the right clamping line section, one ends of the left clamping line section and the right clamping line section, which are far away from the push rod connecting section, are opposite or connected, a left clamping line groove with an opening facing the inner cavity of the push rod is formed in the near end face of the left clamping line section, a right clamping line groove with an opening facing the inner cavity of the push rod is formed in the near end face of the right clamping line section, and the distance between the left clamping line groove and the right clamping line groove is smaller than the inner diameter of the push rod, so that when a polymer wire is clamped through the left clamping line groove and the right clamping line groove, the polymer wire is not exposed outside the outer diameter of the push rod, and abrasion of the polymer wire is prevented in the delivery process of the push rod.

The invention further comprises a holding handle, the holding handle is sleeved at the proximal end of the pushing rod, the holding handle comprises a fixed handle and a movable handle, the fixed handle and the movable handle are sequentially and coaxially arranged from the distal end to the proximal end, the fixed handle is fixedly sleeved with the pushing rod, the movable handle is detachably and fixedly connected with the pushing rod in a clamping manner, the bottom of the movable handle is fixedly connected with the proximal ends of the first cutting line segment and the second cutting line segment, the pushing rod and the cutting line are extremely fine, the holding handle is convenient for operators to operate, the movable handle is detachably and fixedly connected with the pushing rod, so that the movable handle can be pulled to separate from the pushing rod and drive the cutting line to move backwards, the cutting line can break a macromolecule wire, and after a spring ring is smoothly released, the fixed handle is used for driving the pushing rod to move out of a blood vessel.

According to the invention, the first limit groove or the first limit protrusion is arranged on the outer wall of the push rod, the first limit protrusion or the first limit groove is arranged on the inner wall of the movable handle, and the movable handle is detachably clamped and fixed with the push rod through the first limit groove and the first limit protrusion, so that the movable handle can be smoothly separated from the push rod when being pulled backwards.

The movable handle consists of the upper part of the handle and the lower part of the handle, wherein the end face of the upper part of the handle, which faces towards the lower part of the handle, is provided with the second limiting groove or the second limiting protrusion, the end face of the lower part of the handle, which faces towards the upper part of the handle, is provided with the second limiting protrusion or the second limiting groove, and the upper part of the handle is clamped and fixed with the lower part of the handle through the second limiting protrusion and the second limiting groove.

The cutting line is made of metal materials, so that the macromolecule silk thread can be cut and broken by pulling the cutting line, the cutting line can be shaped when the pushing rod is conveyed in a blood vessel, the connecting section of the cutting line cannot be contacted with the silk thread connecting section, and the silk thread connecting section is prevented from being cut in the conveying process of the pushing rod.

The end faces of the cutting line connecting section, facing the first wire section and the second wire section, are ground to form the cutting blades, so that when the spring ring is conveyed in place and needs to be released, the cutting lines are pulled, the cutting blades can cut off the polymer wires, and further smooth release of the spring ring is ensured.

The distal end of the push rod is provided with open slots on the left side wall and the right side wall of the push rod, the open slots are arranged at intervals along the axial direction of the push rod and penetrate through the side wall of the push rod, the open slots on the left side wall of the push rod are staggered with the open slots on the right side wall of the push rod, and the arrangement of the open slots is used for increasing the flexibility of delivery of the push rod in blood vessels.

The outer diameter of the spring ring connecting piece, the outer diameter of the far-end connecting ring and the outer diameter of the far end of the pushing rod are matched, so that the near end face of the spring ring connecting piece can be abutted against the far end face of the far-end connecting ring, and the pushing rod can be pushed in a blood vessel smoothly.

The third limiting groove or the third limiting protrusion is arranged on the distal end face of the distal connecting ring, the third limiting protrusion or the third limiting groove is arranged on the proximal end face of the spring ring connecting piece, and the distal connecting ring is clamped with the spring ring connecting piece through the third limiting groove and the third limiting protrusion, so that the good abutting effect of the distal connecting ring and the spring ring connecting piece is further ensured.

The beneficial effects of the invention are as follows: through setting up the cutting line and setting up alternately with polymer silk thread, in the spring coil is delivered to the aneurysm, outwards pull the cutting line in the proximal end of push rod, the cutting line link of cutting line is contacted with polymer silk thread and break open the silk thread link of polymer silk thread, realize the release of releasing of spring coil, outwards pull the push rod again, shift out the push rod blood vessel, can be successful realize the mechanical release of spring coil and push rod, moreover, the steam generator is simple in structure, convenient for operation, the release time is short, very big reduction operation time, the reduction operation risk; through setting up distal end go-between, spring coil connecting piece and distal end go-between are in touch, when pulling the cutting line and cutting off the polymer silk thread after the spring coil gets into the aneurysm, prevent that the spring coil from being driven the back under the effort of cutting line or pulling out the aneurysm, can prevent effectively that the spring coil from producing the displacement when releasing, further ensure the precision and the success rate that the spring coil releases, simultaneously the spring coil connecting piece cooperates with distal end go-between, also can ensure the stability of spring coil in the delivery process, guarantee that the silk thread linkage segment can block in left card wire casing and right card wire casing all the time in the delivery process; the operation person operation of being convenient for through setting up the handle of holding, set up movable handle and push rod and dismantle fixed connection to make the pulling movable handle can realize with the separation of push rod and drive the line of cut backward movement, make the line of cut can break up polymer silk thread, after the spring coil is the trip smoothly, fixed handle is used for driving the push rod and shifts out the blood vessel.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a front view of the overall structure of the present invention.

Fig. 3 is a bottom view of the overall structure of the present invention.

Fig. 4 is a cross-sectional view A-A of fig. 3 in accordance with the present invention.

Fig. 5 is a schematic view of the engagement structure of the coil and the release mechanism of the present invention.

Fig. 6 is an enlarged schematic view at a in fig. 1.

Fig. 7 is an enlarged schematic view at B in fig. 5.

Fig. 8 is a schematic view of the structure of the releasing mechanism of the present invention.

Fig. 9 is a schematic diagram of the cooperation structure of the moving handle and the pushing rod.

Fig. 10 is a schematic view of the structure of the moving handle of the present invention.

Fig. 11 is a schematic view of another overall structure of the present invention.

FIG. 12 is an enlarged schematic view of the spring ring connector of the present invention mated with a distal connecting ring.

Fig. 13 is a schematic view of the structure of the distal connecting ring of the present invention.

Reference numerals: spring ring-1, spring ring connector-2, releasing mechanism-3, polymer wire-301, first wire segment-3011, second wire segment-3012, wire connecting segment-3013, cutting line-302, first cutting line segment-3021, second cutting line segment-3022, cutting line connecting segment-3023, cutting blade-30231, locking piece-303, push rod connecting segment-3031, left clip line segment-3032, left clip line slot-30321, right clip line segment-3033, right clip line slot-30331, distal connecting ring-304, push rod-4, limit groove-401, open slot-402, left open slot-4021, right open slot-4022, grip handle-5, fixed handle-501, moving handle-502, upper handle-5021, upper limit projection-11, lower handle-2, second limit projection-50221, lower limit projection-50222.

Detailed Description

The invention is described below with reference to the drawings and examples.

The utility model provides an embolic system separator, includes spring coil 1, push rod 4 and release mechanism 3 that are equipped with the inside cavity, release mechanism 3 includes polymer silk thread 301, cutting line 302, locking piece 303 and distal end go-between 304, the proximal end fixedly connected with spring coil connecting piece 2 of spring coil 1, be equipped with distal end go-between 304 and locking piece 303 between spring coil connecting piece 2 and the push rod 4, the distal end and the distal end go-between 304 of locking piece 303 are fixedly connected, proximal end and push rod 4 fixed connection, offer opening towards push rod inside cavity's left card wire casing 30321 and right card wire casing 30331 on the proximal end terminal surface of locking piece 303, the distal end terminal surface of distal end go-between 304 is inconsistent with the proximal end terminal surface of spring coil connecting piece 2;

the polymer wire 301 is threaded in the spring coil 1, the polymer wire 301 is composed of a first wire section 3011, a second wire section 3012 and a wire connecting section 3013, the first wire section 3011 and the second wire section 3012 are respectively and fixedly connected with the spring coil 1, in this embodiment, the spring coil 1 is fixed with the first wire section 3011, the second wire section 3012 and the spring coil connecting piece 2 through dispensing, the proximal end of the first wire section 3011 extends out of the spring coil 1, the spring coil connecting piece 2 and the distal end connecting ring 304 are connected with the right end of the wire connecting section 3013, the proximal end of the second wire section 3012 extends out of the spring coil 1, the spring coil connecting piece 2 and the distal end connecting ring 304 are connected with the left end of the wire connecting section 3013, the wire connecting section 3013 passes through the left clamping wire slot 30321 and the right clamping wire slot 30331, and the spring coil 1 is clamped with the locking piece 303 through the polymer wire 301;

a cutting line 302 is arranged in the internal cavity of the push rod 4 in a penetrating way, the cutting line 302 is arranged along the axial direction of the push rod 4, the cutting line 302 is composed of a first cutting line segment 3021, a second cutting line segment 3022 and a cutting line connecting segment 3023, the cutting line connecting segment 3023 penetrates through the space between the first wire segment 3011 and the second wire segment 3012, the cutting line connecting segment 3023 is arranged in a crossing way and is not contacted with the wire connecting segment 3013, the right end of the cutting line connecting segment 3023 is connected with the distal end of the first cutting line segment 3021, the left end of the cutting line connecting segment 3023 is connected with the distal end of the second cutting line segment 3022, and the proximal ends of the first cutting line segment 3021 and the second cutting line segment 3022 extend out of the internal cavity of the push rod 4; through setting up cutting line 302 and polymer silk thread 301 and alternately setting up, when spring coil 1 delivers to the aneurysm, pull out cutting line 302 in the proximal end of push rod 4, the cutting line linkage segment 3023 of cutting line 302 contacts with the silk thread linkage segment 3013 that is located between left calorie of wire groove and the right calorie of wire groove and struggles apart silk thread linkage segment 3013, realize the release of tripping of spring coil 1, pull out push rod 4 again, remove push rod 4 out of the blood vessel, can successfully realize the mechanical release of spring coil 1 and push rod 4, and is simple in structure, convenient operation, tripping time is short, greatly reduce operation time, reduce the operation risk, this kind of structural design, when the push rod is transferred in the blood vessel, no matter push rod pushes away to the distal end or when retracting to the proximal end and adjusting the spring coil position, can guarantee that spring coil and push rod can not break away, only realize the release when pulling the cutting line; through setting up distal end go-between 304, spring coil connecting piece 2 is inconsistent with distal end go-between 304, when pulling cutting line 302 earned broken polymer silk thread 301 after spring coil 1 got into the aneurysm, prevent that spring coil 1 from being driven the back under the effort of cutting line 302 or pulling out the aneurysm, can effectively prevent to produce the displacement when spring coil 1 releases, further ensure the accuracy and the success rate that spring coil 1 released, the cooperation of spring coil connecting piece 2 and distal end go-between 304 also can ensure the stability of spring coil 1 in the delivery process simultaneously, guarantee that silk thread link 3013 can block in left card wire casing 30321 and right card wire casing 30331 all the time in the delivery process. In this embodiment, the spring coil connector 2 is configured as a ring member and is fixed to the spring coil 1 by dispensing, and the distal end connecting ring 304, the locking member 303 and the push rod are integrally formed.

The locking piece 303 comprises a push rod connecting section 3031, a left clamping line section 3032 and a right clamping line section 3033, the distal end of the push rod connecting section 3031 is fixedly connected with a distal end connecting ring 304, the proximal end of the push rod connecting section 3031 is fixedly connected with a push rod 4, the left end of the push rod connecting section 3031 is fixedly connected with the left clamping line section 3032, the right end of the push rod connecting section 3033 is fixedly connected with the right clamping line section 3033, the left clamping line section 3032 and the right clamping line section 3033 are oppositely or continuously arranged at one end far away from the push rod connecting section, a left clamping line groove 30321 with an opening facing the inner cavity of the push rod is formed in the proximal end face of the left clamping line section 3032, a right clamping line groove 30331 with an opening facing the inner cavity of the push rod is formed in the proximal end face of the right clamping line section 3033, and the distance between the left clamping line groove 30321 and the right clamping line groove 30331 is smaller than the inner diameter of the push rod 4, so that when the high polymer wire 301 is clamped through the left clamping line groove 30321 and the right clamping line groove 30331, the high polymer wire 301 cannot be exposed outside the push rod 4, and the high polymer wire 301 is prevented from being worn and prevented from being influenced in the push rod 4. In this embodiment, the push rod connecting section 3031 is configured to be arc-shaped, so as to be matched with the side wall of the push rod, the left clamping line segment and the right clamping line segment extend towards the inner side, and one ends of the left clamping line segment and the right clamping line segment, which are far away from the push rod connecting section, are close to each other, so that after the polymer wire passes through the left clamping line slot and the right clamping line slot, the first wire segment and the second wire segment cannot exceed the outer diameter of the push rod.

In this embodiment, the groove walls of the left and

right slot

30321 and 30331 are arc groove walls, and the arc groove walls extend obliquely from the proximal end to the distal end towards the direction of the connecting section of the push rod, so that the polymer silk thread can be easily sleeved in the left and right slot and the locking fixing effect is guaranteed.

In this embodiment, the groove wall of the left slot 30321 is in arc-shaped smooth transition connection with the outer end face and the inner end face of the left slot 3032, and the groove wall of the right slot 30331 is in arc-shaped smooth transition connection with the outer end face and the inner end face of the right slot 3033, so as to ensure that the polymer silk yarn in the spring ring cannot be broken.

This embodiment still includes grip handle 5, grip handle 5 cover is in the proximal end of push rod 4, grip handle 5 includes fixed handle 501 and movable handle 502, fixed handle 501, movable handle 502 are by distal end to proximal end coaxial setting in proper order, fixed handle 501 and push rod 4 are fixed to be cup jointed, movable handle 502 can dismantle the joint fixedly with push rod 4, the bottom of movable handle 502 and the proximal end fixed connection of first cut line 3021, second cut line 3022 section, push rod 4 and cutting line 302 are superfine, be convenient for the operation of art person through setting up grip handle 5, set up movable handle 502 and push rod 4 and dismantle fixed connection to make pulling movable handle 502 can realize the separation with push rod 4 and drive cutting line 302 and remove backward, make polymer silk thread 301 struggle apart, after spring coil 1 releases smoothly, fixed handle 501 is used for driving push rod 4 and shifts out the blood vessel.

In this embodiment, the fixed handle 501 is configured as a tubular structure with a front-rear through cavity, so that the fixed handle can be sleeved on the push rod, the movable handle 502 is composed of a movable handle sleeve and a bottom plate, the movable handle sleeve is of a tubular structure with a front-rear through structure, the bottom plate is fixed at the proximal end of the movable handle sleeve, and the proximal end of the cutting line 302 is fixed with the bottom plate, so that the movable handle can be sleeved at the proximal end of the push rod, and the cutting line can be pulled to be retracted.

The outer wall of the push rod 4 is provided with a first limit groove 401 or a first limit protrusion, the inner wall of the movable handle 502 is provided with a first limit protrusion or a first limit groove 401, and the movable handle 502 is detachably and fixedly clamped with the push rod 4 through the first limit groove 401 and the first limit protrusion, so that when the movable handle 502 is pulled backwards, the movable handle 502 can be smoothly separated from the push rod 4. In this embodiment, the left and right sides of the outer wall of the push rod 4 are respectively provided with a first limiting groove 401, and the inner wall of the moving handle 502 is provided with a first limiting protrusion matched with the first limiting groove 401.

The movable handle 502 is composed of a handle upper portion 5021 and a handle lower portion 5022, a second limiting groove or a second limiting protrusion 50221 is arranged on the end face, facing the handle lower portion 5022, of the handle upper portion 5021, a second limiting protrusion 50221 or a second limiting groove is arranged on the end face, facing the handle upper portion 5021, of the handle lower portion 5022, the handle upper portion 5021 is fixedly clamped with the handle lower portion 5022 through the second limiting protrusion 50221 and the second limiting groove, assembly is facilitated during machining, and the movable handle 502 is conveniently mounted to the proximal end of the push rod 4.

In this embodiment, a plurality of second limiting protrusions 50221 are disposed on the lower portion 5022 of the handle, and a second limiting groove matching with the second limiting protrusions 50221 is disposed on the upper portion 5021 of the handle.

In this embodiment, the first limiting protrusion comprises a first upper limiting protrusion portion 50211 and a lower limiting protrusion portion 50222, the first upper limiting protrusion portion 50211 is arranged on the upper handle portion 5021, the second lower limiting protrusion portion 50222 is arranged on the lower handle portion 5022, when the upper handle portion 5021 is attached to the lower handle portion 5022, the first upper limiting protrusion portion 50211 is attached to the second lower limiting protrusion portion 50222 to form a first limiting protrusion, and the structure is convenient for assembling the movable handle to the proximal end of the push rod.

In this embodiment, the first limiting protrusion 401 matched with the first limiting groove is disposed on the inner wall of the moving handle 502, the first limiting protrusion matched with the first limiting groove is disposed on the outer wall of the pushing rod, when the first limiting groove is disposed on the inner wall of the moving handle 502, the first limiting groove comprises an upper portion of the first limiting groove and a lower portion of the limiting groove, an upper portion of the first limiting groove is disposed on the inner wall of the upper portion of the handle, a lower portion of the limiting groove is disposed on the inner wall of the lower portion of the handle, the upper portion of the handle is attached to the lower portion of the handle, and the upper portion of the first limiting groove is attached to the lower portion of the limiting groove to form the first limiting groove matched with the first limiting protrusion.

The cutting line 302 is made of metal materials, so that the macromolecule silk thread 301 can be broken by pulling the cutting line 302, the cutting line 302 can be shaped when the pushing rod 4 is conveyed in a blood vessel, the cutting line connecting section 3023 cannot be contacted with the silk thread connecting section 3013, and the silk thread connecting section 3013 is prevented from being cut in the conveying process of the pushing rod 4.

The end surfaces of the cutting line connection section 3023 facing the first wire section 3011 and the second wire section 3012 are ground to form a cutting blade 30231, so that when the spring coil 1 is conveyed in place and needs to be released, the cutting line 302 is pulled, and the cutting blade 30231 can cut off the polymer wire 301, so that the smooth release of the spring coil 1 is further ensured.

The distal end of push rod 4 all is equipped with open slot 402 on push rod's left side wall, right side wall, open slot 402 sets up along push rod 4's axial interval and runs through push rod 4 lateral wall, open slot 402 on push rod left side wall and open slot 402 on push rod right side wall crisscross setting, the setting of open slot 402 is in order to increase the compliance that the push rod delivered in the blood vessel.

In this embodiment, a left open groove 4021 is formed in the left side wall of the push rod 4, a right open groove 4022 is formed in the right side wall of the push rod, the left open groove 4021 and the right open groove 4022 are all arranged along the axial direction of the push rod at intervals, the left open groove 4021 and the right open groove 4022 are arranged in a staggered manner, and the left open groove 4021 and the right open groove 4022 penetrate through the side wall of the push rod and are communicated with the inner cavity of the push rod.

The length direction of the left opening groove 4021 and the right opening groove 4022 extends along the circumferential direction of the pushing rod to form an arc-shaped structure, so that the pushing rod is ensured to conform to the tortuosity trend of a blood vessel.

The lengths of the left opening groove 4021 and the right opening groove 4022 are respectively larger than one half of the circumferential dimension of the pushing rod 4, the front end part of the left opening groove 4021 and the front end part of the right opening groove 4022 are arranged in a staggered mode, the rear end part of the left opening groove 4021 and the rear end part of the right opening groove 4022 are arranged in a staggered mode, and the delivery flexibility of the pushing rod is further ensured.

The outer diameter of the spring ring connector 2, the outer diameter of the distal connecting ring 304 and the outer diameter of the distal end of the pushing rod 4 are matched, so that the proximal end face of the spring ring connector 2 can be abutted against the distal end face of the distal connecting ring 304, and smooth pushing of the pushing rod 4 in a blood vessel is ensured.

In this embodiment, the diameter of the polymer thread is 0.03mm to 0.05mm, and the diameter of the cutting line is 0.05mm to 0.1mm.

As shown in fig. 11-13, a third limit groove or a third limit protrusion may be provided on the distal end surface of the distal end connecting ring 304, a third limit protrusion or a third limit groove may be provided on the proximal end surface of the spring ring connecting member 2, and the distal end connecting ring 304 is clamped with the spring ring connecting member 2 via the third limit groove and the third limit protrusion, so as to further ensure that the distal end connecting ring and the spring ring connecting member have good interference effect.

In the embodiment, the three whole shape of the limiting groove is a hemispherical groove, and the three limiting protrusion is a hemispherical protrusion matched with the three phases of the limiting groove, so that the assembly is convenient. The distal end face of the distal end connecting ring and the proximal end face of the spring ring connecting piece can be set to be in a step shape, and the step-shaped end face of the distal end connecting ring is attached to the step-shaped end face of the spring ring connecting piece so as to realize the interference between the distal end connecting ring and the spring ring connecting piece.

The invention is used when:

step S1: the operator puts the adaptive guide wire and the guide catheter through femoral artery puncture, sends the guide catheter to a proper position through the guide wire, and withdraws the guide wire;

step S2: carrying a microcatheter through the guide catheter to the aneurysm using the microcatheter, withdrawing the microcatheter;

step S3: the operator conveys the pushing rod 4 and the spring ring 1 to the aneurysm through the micro-catheter, and pushes the spring ring 1 out of the micro-catheter;

step S4: pulling the movable handle 502 backwards to drive the cutting line 302 to move backwards, cutting the wire connecting section 3013 by the cutting blade 30231, preventing the spring coil 1 from moving backwards under the action of the spring coil connector 2 and the distal end connecting ring 304, and realizing mechanical release of the spring coil 1 and the push rod 4;

step S5: the operator holds the fixed handle 501 and pulls it backward to remove the push rod 4 from the microcatheter;

step S6: withdrawing the microcatheter.

The processing method of the locking piece comprises the following steps of (the push rod, the far-end connecting ring and the locking piece are integrally formed):

step S1: fixing the pushing rod 4 through a tool;

step S2: cutting an arc penetrating the side wall of the pushing rod along the circumferential direction of the pushing rod 4 at the distal end of the pushing rod 4 to form a distal end connecting ring 304;

step S3: cutting an arc line penetrating through the side wall of the push rod by laser along the circumferential direction of the push rod 4 at a certain distance from the proximal end of the distal connecting ring 304 to the distal connecting ring to form a locking piece 303, wherein the connecting part of the locking piece 303 and the distal connecting ring 304 and the connecting part of the locking piece 304 and the push rod main body form a push rod connecting section 3031;

step S4: the position of the locking piece 303 far away from the push rod connecting section 3031 is cut along the axial direction by laser cutting to form a left clamping line section 3032 and a right clamping line section 3033;

step S5: the proximal end face of the left clamping line segment 3032 is cut into a left clamping line slot 30321 with an opening facing the proximal end of the push rod by laser cutting, and the proximal end face of the right clamping line segment 3033 is cut into a right clamping line slot 30331 with an opening facing the proximal end of the push rod by laser cutting;

step S6: one end of the left clamping line segment 3032 and one end of the right clamping line segment 3033, which are far away from the push rod connecting segment 3031, are cut off into a section along the axial direction by laser cutting;

step S7: a left internal pressure jack post is arranged on the left side of the left clamping line segment 3032, a right internal pressure jack post is arranged on the right side of the right clamping line segment 3033, and the left internal pressure jack post and the right internal pressure jack post are respectively fixed on the tool;

step S8: the left internal pressure jack and the right internal pressure jack are simultaneously moved inwards to push the left clamping line segment 3032 and the right clamping line segment 3033 to move inwards, so that the distance between the left clamping line slot 30321 and the right clamping line slot 30331 is smaller than the outer diameter of the push rod 4;

step S9: the end face of the left wire clamping line segment 3032, the inside of the left wire clamping line slot 30321, the end face of the right wire clamping line segment 3033 and the inside of the right wire clamping line slot 30331 are all sandblasted and polished, so that the smoothness of the left wire clamping line segment 3032 and the right wire clamping line segment 3033 is ensured, and the polymer wire 301 is ensured not to be broken by grinding in the left wire clamping line slot 30321 and the right wire clamping line slot 30331.

In this embodiment, in step S7, the left and

right wire segments

3032 and 3033 are pressed inward by the left and right inner pressure pillars, or the left and right wire segments can be simultaneously pressed inward by the clamp, which is not limited to the two ways, and the left and right wire segments can be pressed inward, so that the distance between the left and right wire slots is shortened.

In this embodiment, the limit groove 401 at the proximal end of the pushing rod and the open groove 402 at the distal end are both realized by laser cutting.

Claims

1. The utility model provides an embolism system separator, includes spring coil, push rod and the tripping device who is equipped with inside cavity, its characterized in that: the release mechanism comprises a polymer silk thread, a cutting line, a locking piece and a distal connecting ring, wherein the proximal end of the spring ring is fixedly connected with the spring ring connecting piece, the distal connecting ring and the locking piece are arranged between the spring ring connecting piece and the pushing rod, the distal end of the locking piece is fixedly connected with the distal connecting ring, the proximal end is fixedly connected with the pushing rod, a left clamping slot and a right clamping slot with openings facing to the cavity inside the pushing rod are formed in the proximal end face of the locking piece, and the distal end face of the distal connecting ring is in contact with the proximal end face of the spring ring connecting piece;

a cutting line is arranged in the internal cavity of the pushing rod in a penetrating way, the cutting line is arranged along the axial direction of the pushing rod and consists of a first cutting line segment, a second cutting line segment and a cutting line connecting segment, the cutting line connecting segment passes through the space between the first wire segment and the second wire segment, the cutting line connecting section and the silk thread connecting section are arranged in a crossing manner and are not contacted with each other, the right end of the cutting line connecting section is connected with the far end of the first cutting line section, the left end of the cutting line connecting section is connected with the far end of the second cutting line section, and the near ends of the first cutting line section and the second cutting line section extend out of the cavity inside the pushing rod.

2. An embolic system detachment device as in claim 1, wherein: the locking piece comprises a push rod connecting section, a left clamping line section and a right clamping line section, wherein the far end of the push rod connecting section is fixedly connected with a far end connecting ring, the near end of the push rod connecting section is fixedly connected with the push rod, the left end of the push rod connecting section is fixedly connected with a left clamping line section, the right end of the push rod connecting section is fixedly connected with a right clamping line section, one end of the left clamping line section, far away from the push rod connecting section, of the right clamping line section is opposite to or connected with one end of the right clamping line section, the near end face of the left clamping line section is provided with a left clamping line groove with an opening facing the inner cavity of the push rod, and the near end face of the right clamping line section is provided with a right clamping line groove with an opening facing the inner cavity of the push rod, and the distance between the left clamping line groove and the right clamping line groove is smaller than the inner diameter of the push rod.

3. An embolic system detachment device as in claim 1 or 2, wherein: still including holding the handle, the handle cover is held in the proximal end of push rod, the handle of holding includes fixed handle and moving handle, fixed handle, moving handle are coaxial setting in proper order to the proximal end by the distal end, fixed handle cup joints with the push rod is fixed, moving handle can dismantle the joint with the push rod and fix, moving handle's bottom and the proximal end fixed connection of first cutting line segment, second cutting line segment.

4. An embolic system separation device as in claim 3, wherein: the push rod is characterized in that a first limit groove or a first limit protrusion is formed in the outer wall of the push rod, a first limit protrusion or a first limit groove is formed in the inner wall of the movable handle, and the movable handle is detachably and fixedly clamped with the push rod through the first limit groove and the first limit protrusion.

5. An embolic system detachment device as in claim 4, wherein: the movable handle consists of a handle upper part and a handle lower part, wherein a second limit groove or a second limit protrusion is arranged on the end face, facing the handle lower part, of the handle upper part, a second limit protrusion or a second limit groove is arranged on the end face, facing the handle upper part, of the handle lower part, and the handle upper part is fixedly clamped with the handle lower part through the second limit protrusion and the second limit groove.

6. An embolic system detachment device as in claim 1 or 2 or 4 or 5, wherein: the cutting line is made of metal materials.

7. An embolic system detachment device as in claim 6, wherein: and the end surfaces of the cutting line connecting sections facing the first wire section and the second wire section are subjected to grinding treatment to form cutting edges.

8. An embolic system detachment device as in claim 1 or 2 or 4 or 5 or 7, wherein: the distal end of push rod all is equipped with the open slot on push rod's left side wall, right side wall, the open slot sets up and runs through push rod lateral wall along push rod's axial interval, open slot on push rod left side wall and the open slot on push rod right side wall crisscross setting.

9. An embolic system detachment device as in claim 8, wherein: the outer diameter of the spring ring connecting piece, the outer diameter of the far-end connecting ring and the outer diameter of the far-end of the pushing rod are matched.

10. An embolic system detachment device as in claim 1 or 2 or 4 or 5 or 7 or 9, wherein: the distal end face of the distal end connecting ring is provided with a third limit groove or a third limit protrusion, the proximal end face of the spring ring connecting piece is provided with a third limit protrusion or a third limit groove, and the distal end connecting ring is clamped with the spring ring connecting piece through the third limit groove and the third limit protrusion.