CN114191025A - Embolic system separation device - Google Patents
Embolic system separation device Download PDFInfo
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- CN114191025A CN114191025A CN202111562854.5A CN202111562854A CN114191025A CN 114191025 A CN114191025 A CN 114191025A CN 202111562854 A CN202111562854 A CN 202111562854A CN 114191025 A CN114191025 A CN 114191025A
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- push rod
- silk thread
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- cutting line
- handle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
- A61B2017/12054—Details concerning the detachment of the occluding device from the introduction device
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- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
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- Engineering & Computer Science (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
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- Surgical Instruments (AREA)
Abstract
The invention discloses a plug system separating device, which comprises a spring ring, a push rod with an inner cavity and a releasing mechanism, wherein the releasing mechanism comprises a polymer silk thread, a cutting line, a locking piece and a far-end connecting ring, the near end of the spring ring is fixedly connected with a spring ring connecting piece, the far-end connecting ring and the locking piece are arranged between the spring ring connecting piece and the push rod, the far end of the locking piece is fixedly connected with the far-end connecting ring, the near end of the locking piece is fixedly connected with the push rod, the near-end face of the locking piece is provided with a left clamping line groove and a right clamping line groove which are opened towards the inner cavity of the push rod, the far-end face of the far-end connecting ring is abutted against the near-end face of the spring ring connecting piece, the polymer silk thread penetrates through the spring ring, the spring ring is clamped with the locking piece through the polymer silk thread, the cutting line penetrates through the inner cavity of the push rod, and the polymer silk thread breaks through the cutting line Convenient operation, short release time and the like.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a plug system separating device.
Background
The stroke is divided into hemorrhagic stroke and ischemic stroke, and intracranial aneurysm is a hemorrhagic stroke disease with high morbidity and high mortality. The most clinically applied treatment at present adopts interventional therapy to perform coil embolization on the aneurysm, so as to prevent bleeding caused by rupture of the aneurysm.
In a coiled coil embolization aneurysm interventional procedure, coils of different sizes, different three-dimensional or two-dimensional shapes need to be delivered into the aneurysm until the spring within the aneurysm can densely pack the entire aneurysm. Clinically, interventional procedures for every aneurysm typically require several to ten-odd coils to achieve dense packing of the aneurysm. The packing of each spring ring needs to pass through the steps of conveying, placing, releasing and withdrawing the pushing rod, the operation duration of the three steps of conveying, placing and releasing is determined according to the establishment condition of the channel, the clinical operation level of a doctor and the like, and the releasing time of the spring ring can influence the whole operation time.
At present, three main modes of spring ring release include hydrolysis release, electrolysis release and mechanical release. Wherein, the hydrolytic despring ring has poor controllability and less clinical application; the electrolytic release spring ring used in clinic mostly has the problems of too long release time or unstable release time, prolongs the operation time and increases the pain of patients, so the use is limited; the mechanical releasing spring ring gradually becomes mainstream due to the characteristics of quick releasing and simple operation, and becomes the main research direction in the industry.
By 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 far end of the push rod, the spring ring is sleeved on the connecting piece, the push rod is provided with a hook, the near end of the connecting piece is provided with a sleeve ring which can be sleeved on the hook, a traction guide wire is positioned in the push rod, and the far end of the traction guide wire is provided with a pull ring which can be sleeved on the connecting piece; when pushing in a blood vessel, the sleeve ring penetrates through the pull ring, the sleeve ring is sleeved on the hook, the spring ring is fixed at 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 move forward or backward; after the spring coil enters into the aneurysm, pulling tractive seal wire, the pull ring pulling lantern ring on the tractive seal wire makes the lantern ring drop from the couple, loses the effort between pull ring and the lantern ring, and the connecting piece is kick-backed to the distal end under the spring coil elasticity effect to the spring coil in, the spring coil no longer takes place the relation of connection with the push rod, realizes the release of spring coil.
The method has the following disadvantages: firstly, because the drawing guide wire and the connecting piece are extremely fine, the pull ring is arranged at the far end of the drawing guide wire, the lantern ring is arranged at the near end of the connecting piece, the processing is inconvenient, meanwhile, the lantern ring needs to penetrate through the pull ring, and then the lantern ring is hung on the hook, 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, the lantern ring is sleeved on the hook more tightly with a high probability, but the lantern ring cannot be released from the hook, the possibility of the release failure of the spring ring is 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 at the moment, the traction guide wire is pulled, the aperture of the pull ring is tightened, the pull ring is changed into a strip shape, the lantern ring is not easy to release from the aperture of the pull ring, the release time of the spring ring is prolonged, the possibility that the pull ring and the lantern ring cannot be released is high, and the release failure of the spring ring is caused; fourthly, when the pull ring is pulled to separate the sleeve ring from the pull ring, the pull ring and the sleeve ring are not easy to release, so that the spring ring is pulled out of the aneurysm with a great probability and is left in the blood vessel; fifthly, when the pull ring is pulled backwards, the pull ring can drive the sleeve ring to move backwards, the connecting piece can drive the spring ring to move backwards, and the spring ring can enter the inner cavity of the push rod, so that the spring ring is prevented from being disengaged and fails.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide the plug system separating device which is simple in structure, convenient to operate and short in releasing time.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a embolism system separator, includes the spring coil, is equipped with the push rod and the release mechanism of inside cavity, its characterized in that: the releasing mechanism comprises a polymer silk thread, a cutting line, a locking piece and a far-end connecting ring, a spring ring connecting piece is fixedly connected to the near end of the spring ring, a far-end connecting ring and a locking piece are arranged between the spring ring connecting piece and the pushing rod, the far end of the locking piece is fixedly connected with the far-end connecting ring, the near end of the locking piece is fixedly connected with the pushing rod, a left clamping groove and a right clamping groove which are opened towards the inner cavity of the pushing rod are formed in the near-end face of the locking piece, and the far-end face of the far-end connecting ring is abutted to the near-end face of the spring ring connecting piece;
the spring ring is internally provided with a polymer silk thread in a penetrating way, the polymer silk thread consists of a first silk thread section, a second silk thread section and a silk thread connecting section, the first silk thread section and the second silk thread section are respectively and fixedly connected with the spring ring, the near end of the first silk thread section extends out of the spring ring, the spring ring connecting piece and the far end connecting ring and is connected with the right end of the silk thread connecting section, the near end of the second silk thread section extends out of the spring ring, the spring ring connecting piece and the far end connecting ring and is connected with the left end of the silk thread connecting section, the silk thread connecting section passes through the left wire clamping groove and the right wire clamping groove, and the spring ring is clamped with the locking piece through the polymer silk thread;
a cutting line penetrates through the inner cavity of the push rod and is arranged along the axial direction of the push rod, the cutting line consists of a first cutting line section, a second cutting line section and a cutting line connecting section, the cutting line connecting section penetrates through the space between the first silk thread section and the second silk thread section, the cutting line connecting section and the silk thread connecting section are arranged in a crossed mode and are not in contact 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 inner cavity of the push rod; through setting the cutting line and the high polymer silk thread in a cross way, when the spring coil is delivered to the aneurysm, the near end of the push rod pulls the cutting line outwards, the cutting line connecting section of the cutting line is contacted with the high polymer silk thread and breaks the silk thread connecting section of the high polymer silk thread, thereby realizing the releasing of the spring coil, and then pulls the push rod outwards to move the push rod out of the blood vessel, thereby successfully realizing the mechanical releasing of the spring coil and the push rod, the structure is simple, the operation is convenient, the releasing time is short, the operation time is greatly reduced, the operation risk is reduced, through setting the far end connecting ring and the spring coil connecting piece, the spring coil connecting piece is contacted with the far end connecting ring, when the spring coil pulls the high polymer silk thread after entering the aneurysm and breaks the spring coil, the spring coil is prevented from being driven to move backwards or being pulled out of the aneurysm under the acting force of the cutting line, and the displacement can be effectively prevented when the spring coil is released, further ensure the accurate nature and the success rate of spring coil release, the cooperation of spring coil connecting piece and distal end go-between simultaneously also can ensure the stability of spring coil in the delivery in-process, guarantees that the silk thread linkage segment can block in left card wire casing and right card wire casing all the time at the delivery in-process.
The locking piece of the invention 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 a 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, the left wire clamping segment and the right wire clamping segment are arranged oppositely or in a connecting way at one end far away from the connecting segment of the push rod, a left wire clamping groove with an opening facing to the inner cavity of the push rod is arranged on the end surface of the near end of the left wire clamping segment, a right wire clamping groove with an opening facing the inner cavity of the push rod is arranged on the end surface of the near end of the right wire clamping section, the distance between the left wire clamping groove and the right wire clamping groove is smaller than the inner diameter of the push rod, so that when the polymer silk thread passes through left card wire casing, right card wire casing joint, the polymer silk thread can not expose at the outside of push rod external diameter, prevents that the push rod from sending the wearing and tearing that the in-process caused the polymer silk thread.
The invention also comprises a holding handle, the holding handle is sleeved at the near end of the push 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 far end to the near end, the fixed handle is fixedly sleeved with the push rod, the movable handle is detachably clamped and fixed with the push rod, the bottom of the movable handle is fixedly connected with the near ends of the first cutting line segment and the second cutting line segment, the push rod and the cutting line are extremely fine, the holding handle is convenient for an operator to operate, the movable handle is detachably and fixedly connected with the push rod, so that the movable handle can be pulled to separate from the push rod and drive the cutting line to move backwards, the cutting line can break the high polymer silk thread, and the fixed handle is used for driving the push rod to move out of the blood vessel after the spring ring is smoothly released.
According to the invention, the first limiting groove or the first limiting bulge is arranged on the outer wall of the pushing rod, the first limiting bulge or the first limiting groove is arranged on the inner wall of the movable handle, and the movable handle is detachably clamped and fixed with the pushing rod through the first limiting groove and the first limiting bulge, so that the movable handle can be smoothly separated from the pushing rod when the movable handle is pulled backwards.
The movable handle is composed of a handle upper portion and a handle lower portion, a second limiting groove or a second limiting protrusion is arranged on the end face, facing the handle lower portion, of the handle upper portion, a second limiting protrusion or a second limiting groove is arranged on the end face, facing the handle upper portion, of the handle lower portion, the handle upper portion is clamped and fixed with the handle lower portion through the second limiting protrusion and the second limiting groove, and during machining, assembly is facilitated, and the movable handle is conveniently installed at the near end of the push rod.
The cutting line is made of metal materials, so that the polymer silk thread can be cut off by pulling the cutting line, the cutting line can be shaped when the pushing rod is moved in a blood vessel, the connecting section of the cutting line cannot be contacted with the connecting section of the silk thread, and the connecting section of the silk thread is prevented from being cut off in the moving 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 a cutting blade, so that when the spring ring is conveyed to the position and needs to be released, the cutting line is pulled, the cutting blade can cut off the polymer wire, and the smooth release of the spring ring is further ensured.
The far end of the push rod is provided with open grooves on the left side wall and the right side wall of the push rod, the open grooves are arranged at intervals along the axial direction of the push rod and penetrate through the side wall of the push rod, the open grooves on the left side wall of the push rod and the open grooves on the right side wall of the push rod are arranged in a staggered mode, and the open grooves are arranged to increase delivery flexibility 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 guaranteed to be pushed in a blood vessel smoothly.
According to the invention, the far end face of the far end connecting ring is provided with the third limiting groove or the third limiting bulge, the near end face of the spring connecting piece is provided with the third limiting bulge or the third limiting groove, and the far end connecting ring is clamped with the spring connecting piece through the third limiting groove and the third limiting bulge, so that the good abutting effect of the far end connecting ring and the spring connecting piece is further ensured.
The invention has the beneficial effects that: by arranging the cutting line and the polymer silk thread in a crossed manner, when the spring ring is delivered to the aneurysm, the cutting line is pulled outwards from the near end of the push rod, the connecting section of the cutting line is contacted with the polymer silk thread and breaks the connecting section of the silk thread of the polymer silk thread, so that the release of the spring ring is realized, the push rod is pulled outwards to move out of the blood vessel, the mechanical release of the spring ring and the push rod can be successfully realized, the structure is simple, the operation is convenient, the release time is short, the operation time is greatly reduced, and the operation risk is reduced; by arranging the far-end connecting ring and the spring ring connecting piece, the spring ring connecting piece is abutted against the far-end connecting ring, when the spring ring enters the aneurysm and pulls the cutting line to cut off the high-polymer silk thread, the spring ring is prevented from being driven to move backwards or pull out of the aneurysm under the action force of the cutting line, the spring ring can be effectively prevented from displacing when being disengaged, the accuracy and the success rate of the release of the spring ring are further ensured, meanwhile, the spring ring connecting piece is matched with the far-end connecting ring, the stability of the spring ring in the delivery process can also be ensured, and the silk thread connecting section can be ensured to be always clamped in the left clamping groove and the right clamping groove in the delivery process; the operation of the art person of being convenient for through setting up the gripping handle, set up movable handle and can dismantle fixed connection with the push rod to make the pulling movable handle can realize and drive the line of cut backward with the separation of push rod, make the line of cut can break the polymer silk thread, the spring coil is liberated the back smoothly, and fixed handle is used for driving the push rod and shifts out the blood vessel.
Drawings
Fig. 1 is a schematic view 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 of the present invention.
Fig. 5 is a schematic view of the spring ring and release mechanism engagement 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 release mechanism of the present invention.
FIG. 9 is a schematic view of the structure of the moving handle and the pushing rod of the present invention.
Fig. 10 is a schematic view of the moving handle structure of the present invention.
Fig. 11 is another overall structure diagram of the present invention.
Figure 12 is an enlarged view of the spring connector of the present invention in cooperation with the distal connector ring.
Fig. 13 is a schematic view of a distal attachment ring structure in accordance with the present invention.
Reference numerals: a spring ring-1, a spring ring connecting piece-2, a releasing mechanism-3, a macromolecule silk thread-301, a first silk thread segment-3011, a second silk thread segment-3012, a silk thread connecting segment-3013, a cutting line-302, a first cutting line segment-3021, a second cutting line segment-3022, a cutting line connecting segment-3023, a cutting blade-30231, a locking piece-303, a push rod connecting segment-3031, a left clamping line segment-3032, a left clamping line segment-30321, a right clamping line segment-3033, a right clamping line segment-30331, a far-end connecting ring-304, a push rod-4, a limiting groove-401, an open groove-402, a left open groove-4021, a right open groove-4022, a holding handle-5, a fixed handle-501, a moving handle-502, a handle upper-5021, a handle connecting ring-3011, a left opening groove-4021, a right opening groove-4022, a left opening groove-4022, a holding handle-5, a moving handle-501, a left handle, a right handle, a left handle, a right handle, a, The upper part-50211 of the limit bulge I, the lower part-5022 of the handle, the second limit bulge-50221 and the lower part-50222 of the limit bulge I.
Detailed Description
The invention is described below with reference to the accompanying drawings and examples.
A plug system separation device comprises a spring ring 1, a push rod 4 and a release mechanism 3, wherein the push rod 4 is provided with an internal cavity, the release mechanism 3 comprises a polymer silk thread 301, a cutting line 302, a locking piece 303 and a far-end connecting ring 304, the near end of the spring ring 1 is fixedly connected with a spring ring connecting piece 2, the far-end connecting ring 304 and the locking piece 303 are arranged between the spring ring connecting piece 2 and the push rod 4, the far end of the locking piece 303 is fixedly connected with the far-end connecting ring 304, the near end of the locking piece 303 is fixedly connected with the push rod 4, the near end face of the locking piece 303 is provided with a left clamping line groove 30321 and a right clamping line groove 30331, the openings of the left clamping line groove 30321 face the internal cavity of the push rod, and the far-end face of the far-end connecting ring 304 is abutted to the near-end face of the spring ring connecting piece 2;
a macromolecule silk thread 301 penetrates through the spring ring 1, the macromolecule silk thread 301 is composed of a first silk thread section 3011, a second silk thread section 3012 and a silk thread connection section 3013, the first silk thread section 3011 and the second silk thread section 3012 are respectively fixedly connected with the spring ring 1, in this embodiment, the spring ring 1, the first silk thread section 3011, the second silk thread section 3012 and the spring ring connecting piece 2 are fixed through glue, the proximal end of the first silk thread section 3011 extends out of the spring ring 1, the spring ring connecting piece 2 and the distal end connecting ring 304 are connected with the right end of the silk thread connection section 3013, the proximal end of the second silk thread section 3012 extends out of the spring ring 1, the spring ring connecting piece 2 and the distal end connecting ring 304 and is connected with the left end of the silk thread connection section 3013, the silk thread connection section 3013 passes through the left clamping wire groove 30321 and the right clamping wire groove 30331, and the spring ring 1 is clamped with the locking piece 303 through the macromolecule silk thread 301;
a cutting line 302 penetrates through the inner cavity of the push rod 4, 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 thread segment 3011 and the second thread segment 3012, the cutting line connecting segment 3023 and the thread connecting segment 3013 are arranged in a crossed mode and are not in contact with each other, the right end of the cutting line connecting segment 3023 is connected with the far end of the first cutting line segment 3021, the left end of the cutting line connecting segment 3023 is connected with the far end of the second cutting line segment 3022, and the near ends of the first cutting line segment 3021 and the second cutting line segment 3022 extend out of the inner cavity of the push rod 4; by placing the cut 302 across the polymer thread 301, when the coil 1 is delivered into an aneurysm, the cutting line 302 is pulled outwards from the near end of the push rod 4, the cutting line connecting section 3023 of the cutting line 302 contacts with the silk thread connecting section 3013 between the left wire clamping groove and the right wire clamping groove and breaks the silk thread connecting section 3013 to release the spring ring 1, the push rod 4 is pulled outwards to move the push rod 4 out of the blood vessel, the mechanical release of the spring ring 1 and the push rod 4 can be successfully realized, the structure is simple, the operation is convenient, the release time is short, the operation time is greatly reduced, the operation risk is reduced, the structural design is that when the push rod is moved in the blood vessel, when the spring ring is adjusted whether the pushing rod pushes towards the far end or retracts towards the near end, the spring ring can be prevented from being separated from the pushing rod, and the spring ring can be separated only when the cutting line is pulled; through setting up distal end go-between 304, spring coil connecting piece 2 is inconsistent with distal end go-between 304, spring coil 1 draws the line of cut 302 after getting into the aneurysm and breaks polymer silk thread 301, prevent that spring coil 1 from being driven under the effort of line of cut 302 and moving backward or pull out the aneurysm, produce the displacement when can effectively preventing spring coil 1 from breaking away, further ensure the accuracy and the success rate of the 1 release of spring coil, spring coil connecting piece 2 and distal end go-between 304's cooperation simultaneously, also can ensure the stability of spring coil 1 at the delivery in-process, guarantee that silk thread connection section 3013 can block all the time in left card wire casing 30321 and right card wire casing 30331 in the delivery process. The spring coil connecting piece 2 is arranged as a ring-shaped piece and fixed with the spring coil 1 through glue dispensing, and the far-end connecting ring 304, the locking piece 303 and the pushing rod are integrally formed.
The locking member 303 comprises a push rod connecting section 3031, a left wire clamping section 3032 and a right wire clamping section 3033, the distal end of the push rod connecting section 3031 is fixedly connected with the distal end connecting ring 304, the proximal end of the push rod connecting section 3031 is fixedly connected with the push rod 4, the left end of the push rod connecting section 3031 is fixedly connected with the left wire clamping section 3032, the right end of the push rod connecting section 3033 is fixedly connected with the right wire clamping section 3033, the left wire clamping section 3032 and the right wire clamping section 3033 are oppositely or continuously arranged at the end far away from the push rod connecting section, a left wire clamping groove 30321 with an opening facing the inner cavity of the push rod is arranged on the proximal end face of the left wire clamping section 3032, a right wire clamping groove 30331 with an opening facing the inner cavity of the push rod is arranged on the proximal end face of the right wire clamping section 3033, the distance between the left wire clamping groove 30321 and the right wire clamping groove 30331 is smaller than the inner diameter of the push rod 4, so that the polymer silk thread 301 is not exposed outside the outer diameter of the polymer wire clamping groove 3033 when the polymer wire is clamped through the left wire clamping groove 30321 and the right wire clamping groove 30331, not only prevents the abrasion of the polymer silk thread 301 caused in the delivery process of the push rod 4, but also ensures that the push of the push rod is not influenced. The push rod connection segment 3031 in this embodiment is set to be arc-shaped, so as to match with the side wall of the push rod, the left clamping line segment and the right clamping line segment both extend to the inner side, and the ends of the left clamping line segment and the right clamping line segment, which are far away from the push rod connection segment, are close to each other, so as to ensure that the first silk thread segment and the second silk thread segment cannot exceed the outer diameter of the push rod after the polymer silk thread passes through the left clamping line slot and the right clamping line slot.
In this embodiment, the groove walls of the left wire clamping groove 30321 and the right wire clamping groove 30331 are arc-shaped groove walls, and the arc-shaped groove walls extend from the near end to the far end in an inclined manner toward the direction of the connecting section of the push rod, so that the polymer silk thread can be easily sleeved in the left wire clamping groove and the right wire clamping groove, and the locking and fixing effects are good.
In this embodiment, the groove wall of the left wire retaining groove 30321 and the outer end surface and the inner end surface of the left wire retaining section 3032 are in arc-shaped smooth transition connection, and the groove wall of the right wire retaining groove 30331 and the outer end surface and the inner end surface of the right wire retaining section 3033 are in arc-shaped smooth transition connection, so as to ensure that the polymer filaments in the spring ring are not broken.
This embodiment further comprises a holding handle 5, the holding handle 5 is sleeved on the proximal end of the pushing rod 4, the holding handle 5 comprises a fixed handle 501 and a movable handle 502, the fixed handle 501 and the movable handle 502 are coaxially arranged from the far end to the near end in sequence, the fixed handle 501 is fixedly sleeved with the push rod 4, the movable handle 502 is detachably clamped and fixed with the push rod 4, the bottom of the movable handle 502 is fixedly connected with the proximal ends of the first cutting line section 3021 and the second cutting line section 3022, the push rod 4 and the cutting line 302 are extremely fine, the holding handle 5 is arranged to facilitate the operation of the operator, the moving handle 502 is detachably and fixedly connected with the pushing rod 4, so that the pulling of the moving handle 502 can separate from the pushing rod 4 and drive the cutting line 302 to move backwards, so that the cutting line 302 can break the polymer silk thread 301, and after the spring ring 1 is released smoothly, the fixing handle 501 is used for driving the push rod 4 to move out of the blood vessel.
In this embodiment, the fixed handle 501 is configured to be a cylindrical structure having a front and rear through cavity, so that the fixed handle can be sleeved on the push rod, the movable handle 502 is configured to be a movable handle sleeve and a bottom plate, the movable handle sleeve is a cylindrical structure having a front and rear through cavity, the bottom plate is fixed to the proximal end of the movable handle sleeve, and the proximal end of the cutting line 302 is fixed to the bottom plate, so that the movable handle can be sleeved on the proximal end of the push rod, and can pull the cutting line to retract.
Be equipped with spacing recess one 401 or spacing protruding one on the outer wall of push rod 4, be equipped with spacing protruding one or spacing recess one 401 on the inner wall of moving handle 502, moving handle 502 can dismantle the joint with push rod 4 through spacing recess one 401 and spacing protruding one and fix, and when being convenient for pull backward moving handle 502, moving handle 502 can break away from with push rod 4 smoothly. In this embodiment, the left side and the right side of the outer wall of the pushing rod 4 are both provided with a first limiting groove 401, and the inner wall of the movable handle 502 is provided with a first limiting protrusion matched with the first limiting groove 401.
The movable handle 502 comprises a handle upper part 5021 and a handle lower part 5022, a limit groove two or a limit protrusion two 50221 is arranged on the end face of the handle upper part 5021 towards the handle lower part 5022, a limit protrusion two 50221 or a limit groove two is arranged on the end face of the handle lower part 5022 towards the handle upper part 5021, the handle upper part 5021 is connected with the handle lower part 5022 through the limit protrusion two 50221 and the limit groove two and is fixed, and during processing, the assembly is convenient, and the movable handle 502 is convenient to be installed to the near end of the push rod 4.
In this embodiment, the lower portion 5022 of the handle is provided with a plurality of second limit protrusions 50221, and the upper portion 5021 of the handle is provided with a second limit groove 50221 which is matched with the second limit protrusions 50221.
In this embodiment, the first limit protrusion comprises an upper portion 50211 and a lower portion 50222, the upper portion 50211 is arranged on the upper portion 5021, the lower portion 50222 is arranged on the lower portion 5022, and when the upper portion 5021 is attached to the lower portion 5022, the upper portion 50211 and the lower portion 50222 are attached to form the first limit protrusion.
In this embodiment, the inner wall of the moving handle 502 is provided with a first limiting protrusion matched with the first limiting groove 401, the inner wall of the moving handle 502 can also be provided with a first limiting groove, the outer wall of the push rod is provided with a first limiting protrusion matched with the first limiting groove, when the inner wall of the moving handle 502 is provided with the first limiting groove, the first limiting groove comprises a first upper limiting groove part and a first lower limiting groove part, the inner wall of the upper part of the handle is provided with a first upper limiting groove part, the inner wall of the lower part of the handle is provided with a first lower limiting groove part, the upper part of the handle is attached to the lower part of the handle, the first upper part of the first limiting groove part is attached to the lower part of the limiting groove part to form a first limiting groove matched with the first limiting protrusion, and the push rod and the moving handle can be conveniently assembled by the structural design.
The cutting line 302 is made of metal materials, so that the polymer silk thread 301 can be broken by pulling the cutting line 302, and the cutting line 302 can be shaped when the push rod 4 is transferred in a blood vessel, the cutting line connecting section 3023 cannot be in contact with the silk thread connecting section 3013, and the silk thread connecting section 3013 is prevented from being cut off in the transferring process of the push rod 4.
The cutting line connecting section 3023 is evenly ground and flattened towards the end surfaces of the first thread section 3011 and the second thread section 3012 to form a cutting blade 30231, so that when the spring ring 1 is conveyed to the right position and needs to be released, the cutting line 302 is pulled, the cutting blade 30231 can cut the polymer thread 301, and smooth release of the spring ring 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 and runs through push rod 4 lateral wall along push rod 4's axial interval, open slot 402 on the push rod left side wall sets up with open slot 402 on the push rod right side wall is crisscross, and the setting of open slot 402 is in order to increase the compliance that the push rod delivered in the blood vessel.
Be equipped with left open slot 4021 on the left side wall of push rod 4 in this embodiment, be equipped with right open slot 4022 on the right side wall of push rod, left open slot 4021, right open slot 4022 all set up along the axial interval of push rod, left open slot 4021 sets up with right open slot 4022 is crisscross, left open slot 4021, right open slot 4022 all run through the lateral wall of push rod and are linked together with the inside cavity of push rod.
The length directions of the left open slot 4021 and the right open slot 4022 extend along the circumferential direction of the push rod to form an arc-shaped structure, so that the push rod can be ensured to conform to the tortuous trend of blood vessels.
The lengths of the left open slot 4021 and the right open slot 4022 are both greater than one half of the circumferential dimension of the push rod 4, the front end of the left open slot 4021 and the front end of the right open slot 4022 are arranged in a staggered manner, and the rear end of the left open slot 4021 and the rear end of the right open slot 4022 are arranged in a staggered manner, so that the delivery flexibility of the push rod is further ensured.
The outer diameter of the spring ring connecting piece 2, the outer diameter of the far-end connecting ring 304 and the outer diameter of the far end of the pushing rod 4 are matched, so that the near-end face of the spring ring connecting piece 2 can be abutted against the far-end face of the far-end connecting ring 304, and the pushing rod 4 can be guaranteed to be smoothly pushed in a blood vessel.
In this embodiment, the diameter of the polymer filament is 0.03mm to 0.05mm, and the diameter of the cutting line is 0.05mm to 0.1 mm.
As shown in fig. 11-13, a third limiting groove or a third limiting protrusion may be formed on the distal end surface of the distal end connection ring 304, a third limiting protrusion or a third limiting groove is formed on the proximal end surface of the spring connector 2, and the distal end connection ring 304 is clamped with the spring connector 2 through the third limiting groove and the third limiting protrusion, so as to further ensure that the distal end connection ring and the spring connector have good abutting effect.
The overall shape of the third limiting groove is a hemispherical groove, and the third limiting protrusion is a hemispherical protrusion matched with the three phases of the third limiting groove, so that the assembly is facilitated. The far end face of the far end connecting ring and the near end face of the spring connecting piece can also be arranged to be in a step shape, and the step-shaped end face of the far end connecting ring is attached to the step-shaped end face of the spring connecting piece so as to realize the interference between the far end connecting ring and the spring connecting piece.
When the invention is used:
step S1: the operator puts in 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: using a micro guide wire to carry the micro catheter to pass through the guide catheter to reach the aneurysm, and withdrawing the micro guide wire;
step S3: the operator conveys the push rod 4 and the spring coil 1 to the aneurysm through the microcatheter and pushes the spring coil 1 out of the microcatheter;
step S4: the moving handle 502 is pulled backwards to drive the cutting line 302 to move backwards, the cutting blade 30231 cuts off the silk thread connection section 3013, the spring ring 1 cannot move backwards under the action of the spring ring connecting piece 2 and the far-end connecting ring 304, and the spring ring 1 and the push rod 4 are mechanically disengaged;
step S5: the operator holds the fixed handle 501, pulls the fixed handle backwards, and removes the push rod 4 from the microcatheter;
step S6: the microcatheter is withdrawn.
The processing method of the locking piece of the invention comprises the following steps (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: laser cutting the distal end of the push rod 4 along the circumference of the push rod 4 to form an arc line penetrating the side wall of the push rod, so as to form a distal connecting ring 304;
step S3: laser cutting the push rod 4 at a distance from the proximal end of the distal connector ring 304 to a circumference of the push rod to form a curved line that extends through the side wall of the push rod to form a locking member 303, the connection between the locking member 303 and the distal connector ring 304 and the connection between the locking member 304 and the push rod body forming a push rod connection 3031;
step S4: the position, far away from the push rod connecting section 3031, on the locking piece 303 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: a left wire clamping groove 30321 with an opening facing the near end of the push rod is cut on the near end face of the left wire clamping section 3032 through laser cutting, and a right wire clamping groove 30331 with an opening facing the near end of the push rod is cut on the near end face of the right wire clamping section 3033 through laser cutting;
step S6: one ends of the left clamping line segment 3032 and the right clamping line segment 3033, which are far away from the push rod connecting segment 3031, are respectively cut off in the axial direction by laser cutting;
step S7: a left internal pressure top column is arranged on the left side of the left clamping line segment 3032, a right internal pressure top column is arranged on the right side of the right clamping line segment 3033, and the left internal pressure top column and the right internal pressure top column are respectively fixed on a tool;
step S8: the left inner pressure top column and the right inner pressure top column are simultaneously moved inwards, the left wire clamping section 3032 and the right wire clamping section 3033 are pushed to move inwards, and the distance between the left wire clamping groove 30321 and the right wire clamping groove 30331 is smaller than the outer diameter of the push rod 4;
step S9: the end face of the left wire clamping section 3032, the interior of the left wire clamping groove 30321, the end face of the right wire clamping section 3033 and the interior of the right wire clamping groove 30331 are subjected to sand blasting and polishing, so that the smoothness of the left wire clamping section 3032 and the smoothness of the right wire clamping section 3033 are ensured, and the high polymer silk thread 301 is ensured to be clamped in the left wire clamping groove 30321 and the right wire clamping groove 30331 and cannot be broken by abrasion.
In step S7, the left wire clamping segment 3032 and the right wire clamping segment 3033 are pressed inward by the left inner pressing top pillar and the right inner pressing top pillar, and the left wire clamping segment and the right wire clamping segment can be pressed inward by the clamp at the same time.
In this embodiment, the first limit groove 401 at the proximal end of the push rod and the open groove 402 at the distal end of the push rod are both realized by laser cutting.
Claims (10)
1. The utility model provides a embolism system separator, includes the spring coil, is equipped with the push rod and the release mechanism of inside cavity, its characterized in that: the releasing mechanism comprises a polymer silk thread, a cutting line, a locking piece and a far-end connecting ring, a spring ring connecting piece is fixedly connected to the near end of the spring ring, a far-end connecting ring and a locking piece are arranged between the spring ring connecting piece and the pushing rod, the far end of the locking piece is fixedly connected with the far-end connecting ring, the near end of the locking piece is fixedly connected with the pushing rod, a left clamping groove and a right clamping groove which are opened towards the inner cavity of the pushing rod are formed in the near-end face of the locking piece, and the far-end face of the far-end connecting ring is abutted to the near-end face of the spring ring connecting piece;
the spring ring is internally provided with a polymer silk thread in a penetrating way, the polymer silk thread consists of a first silk thread section, a second silk thread section and a silk thread connecting section, the first silk thread section and the second silk thread section are respectively and fixedly connected with the spring ring, the near end of the first silk thread section extends out of the spring ring, the spring ring connecting piece and the far end connecting ring and is connected with the right end of the silk thread connecting section, the near end of the second silk thread section extends out of the spring ring, the spring ring connecting piece and the far end connecting ring and is connected with the left end of the silk thread connecting section, the silk thread connecting section passes through the left wire clamping groove and the right wire clamping groove, and the spring ring is clamped with the locking piece through the polymer silk thread;
the cutting line is arranged along the axial direction of the push rod in a penetrating mode, the cutting line is composed of a first cutting line section, a second cutting line section and a cutting line connecting section, the cutting line connecting section penetrates through the space between the first silk thread section and the second silk thread section, the cutting line connecting section and the silk thread connecting section are arranged in a crossed mode and are not in contact 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 inner cavity of the push rod.
2. The embolic system separation device of claim 1, wherein: the locking piece includes push rod linkage segment, left card line segment and right card line segment, the distal end and the distal end go-between fixed connection of push rod linkage segment, near-end and push rod fixed connection, the left end and the left card line segment fixed connection of push rod linkage segment, right-hand member and right card line segment fixed connection, the one end that push rod linkage segment was kept away from to left card line segment and right card line segment is relative or links to each other and sets up, set up the left card wire casing of opening towards the inside cavity of push rod on the near-end terminal surface of left card line segment, set up the right card wire casing of opening towards the inside cavity of push rod on the near-end terminal surface of right card line segment, the distance between left card wire casing and the right card wire casing is less than the internal diameter of push rod.
3. An embolic system separation device as in claim 1 or 2, wherein: still include the grip handle, the grip handle cover is at the near-end of push rod, the grip handle includes fixed handle and moving handle, fixed handle, moving handle are by the distal end to the coaxial setting in proper order of near-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 first cutting line segment, second cutting line segment's near-end fixed connection.
4. A plug system detachment apparatus as in claim 3, further comprising: the outer wall of the push rod is provided with a first limiting groove or a first limiting protrusion, the inner wall of the movable handle is provided with a first limiting protrusion or a first limiting groove, and the movable handle is detachably clamped and fixed with the push rod through the first limiting groove and the first limiting protrusion.
5. The embolic system separation device of claim 4, wherein: the movable handle is composed of a handle upper portion and a handle lower portion, a second limiting groove or a second limiting protrusion is arranged on the end face, facing the handle lower portion, of the handle upper portion, a second limiting protrusion or a second limiting groove is arranged on the end face, facing the handle upper portion, of the handle lower portion, and the handle upper portion is fixed with the handle lower portion in a clamped mode through the second limiting protrusion and the second limiting groove.
6. An embolic system separation device as in claim 1, 2, 4 or 5, wherein: the cutting line is made of metal materials.
7. The embolic system separation device of claim 6, wherein: and the end surfaces of the cutting line connecting sections facing the first wire section and the second wire section are evenly ground to form a cutting blade.
8. An embolic system separation device as in claim 1, 2, 4, 5 or 7, wherein: the utility model discloses a push rod, including push rod, push rod's distal end 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 the push rod lateral wall along push rod's axial interval, open slot on the push rod left side wall sets up with the open slot is crisscross on the push rod right side wall.
9. The embolic system separation device of 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 separation device as in claim 1, 2, 4, 5, 7, or 9, wherein: the spring connector is characterized in that a third limiting groove or a third limiting protrusion is arranged on the far end face of the far end connecting ring, a third limiting protrusion or a third limiting groove is arranged on the near end face of the spring connector, and the far end connecting ring is connected with the spring connector in a clamping mode through the third limiting groove and the third limiting protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111562854.5A CN114191025B (en) | 2021-12-20 | 2021-12-20 | Embolic system detachment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111562854.5A CN114191025B (en) | 2021-12-20 | 2021-12-20 | Embolic system detachment device |
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| CN114191025A true CN114191025A (en) | 2022-03-18 |
| CN114191025B CN114191025B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111562854.5A Active CN114191025B (en) | 2021-12-20 | 2021-12-20 | Embolic system detachment device |
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|---|---|
| CN114191025B (en) | 2023-05-09 |
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