CN114469231B - Embolic coil conveying system - Google Patents
Embolic coil conveying system Download PDFInfo
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- CN114469231B CN114469231B CN202210102385.7A CN202210102385A CN114469231B CN 114469231 B CN114469231 B CN 114469231B CN 202210102385 A CN202210102385 A CN 202210102385A CN 114469231 B CN114469231 B CN 114469231B
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- 230000003073 embolic effect Effects 0.000 title claims abstract description 18
- 239000007943 implant Substances 0.000 claims abstract description 37
- 238000002513 implantation Methods 0.000 claims description 11
- 239000003550 marker Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000007917 intracranial administration Methods 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010002329 Aneurysm Diseases 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 201000008450 Intracranial aneurysm Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005259 peripheral blood Anatomy 0.000 description 1
- 239000011886 peripheral blood Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011277 treatment modality Methods 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
-
- 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
-
- 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
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Reproductive Health (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurosurgery (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses an embolic coil conveying system, which belongs to the technical field of medical appliances, and comprises: an implant comprising a release assembly, wherein a rod-shaped part of the release assembly extends out of one end of the implant to be provided with a spherical head part; a pushing system comprising a release wire wound on the release member proximate one end of the implant for detachable mounting on the release member by the bulbous head; the breaking release mechanism is positioned at one end of the pushing system far away from the implant, and the breaking wire extends into the breaking release mechanism far away from the spherical head part and is used for breaking to separate the implant. The invention provides a novel mechanical release structure, wherein a distal release wire is detachably connected with a release assembly through a spiral spring-shaped structure, so that the machining precision and assembly requirements of parts are reduced, and the release reliability is improved.
Description
Technical Field
The invention belongs to the technical field of medical appliances, and particularly relates to an embolic coil conveying system.
Background
Percutaneous therapy of intravascular lesions in a variety of forms is an increasingly popular treatment modality. Embolic coil therapy is also becoming increasingly available in a wide range of applications as a common clinical instrument. The embolic spring ring plays an important role in treating from intracranial aneurysm to peripheral blood vessel and then to tumor, and can promote thrombosis, prevent aneurysm from bleeding or cut off tumor blood supply, etc.
Embolic coils are typically composed of two parts, including a pusher system for delivery and a coil for implantation. After percutaneous vascular puncture, the coil is delivered to a predetermined location through a multi-stage delivery catheter. Taking intracranial implantation as an example, a guide catheter is first inserted into a puncture sheath, the distal end of the guide catheter reaches an ideal position and then is placed into an intermediate catheter, and finally, the intracranial microcatheter is placed. After the microcatheter reaches the lesion site, we can then place the embolic coil system, and after the coil reaches the predetermined site we need to manipulate the instrument ex vivo to separate the pusher system from the coil.
There are various solutions on the market such as mechanical release (with a mechanical locking mechanism inside, unlocking by external operation), electrolytic release (melting the joint by energizing), hydrolytic release (melting the joint after contact with water), etc.
However, the above release method has various problems:
and (3) electrolytic stripping: the release time is long, and matched power supply equipment is needed. The current can pass through the blood vessel and the temperature is increased, which causes harm to the blood vessel or the blood flow environment.
Hydrolysis and removal: the hydrolysis release is realized by introducing solvent into the conveying pipe for dissolution, the problem of unstable release mode exists, the pressure of blood vessels is easy to increase when the solvent is injected, and the release is difficult to realize if the solvent injection quantity is insufficient and the position where the spring ring cannot be released is not reached.
For mechanical release, the damage to the human body is small, the realizability is high, but the requirement on the processing precision is high, the structural assembly requirement is high, the structure is easy to fail, in addition, the product on the market usually pulls the release wire at the proximal end of the conveying system in the conveying system through a manual breaking or release device, the purpose of releasing the spring ring is achieved, the embolic spring ring system as proposed by CN113413186A is high in the processing precision, and once the release wire is blocked or broken, serious consequences can occur.
Disclosure of Invention
The invention aims to provide an embolic coil delivery system, which aims to solve the problems in the use process of the prior embolic coil delivery system in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: an embolic coil delivery system, comprising:
an implant comprising a release assembly, wherein a rod-shaped part of the release assembly extends out of one end of the implant to be provided with a spherical head part;
a pushing system comprising a release wire wound on the release member proximate one end of the implant for detachable mounting on the release member by the bulbous head;
the breaking release mechanism is positioned at one end of the pushing system far away from the implant, and the breaking wire extends into the breaking release mechanism far away from the spherical head part and is used for breaking to separate the implant.
The raw material of the untwisted yarn is nickel titanium yarn, the distal end is ground and the diameter is reduced, the grinding section is wound on a heat treatment tool, and the heat treatment tool is shaped, and finally the heat treatment tool is shaped.
According to the convention in the medical instrument field, the "proximal end" refers to the end of the medical instrument, which is close to the doctor, when the doctor uses the medical instrument; "distal" refers to the end of the medical device that is distal from the doctor when the doctor is using the medical device.
The distal end of the present disclosure may be said to mean the end of the device that is proximal to the implant.
The spring ring is made of alloy through coiling, and is formed into a certain shape through heat treatment.
Preferably, the other end of the release assembly is provided with an annular member and is connected with a filament.
The filaments are made of high polymer materials.
The implantation stop ring is a 304 metal ring having a smaller bore diameter than the annular member of the release assembly.
Preferably, an implantation baffle ring is arranged on the outer edge of one end of the rod-shaped part, which is close to the annular part, and a spring ring is connected to the outer wall of the implantation baffle ring.
The release assembly is 304 and the rod-shaped portion is connected to the spherical head at one end and to the annular member at the other end, and the spring ring is welded to the implant stop ring.
Preferably, the aperture of the implant stop ring is smaller than the outer diameter of the annular member.
Preferably, the end of the release wire near the implant is arranged in a spiral spring-like structure and wound on the rod-shaped part.
Preferably, a pushing rod is arranged outside the release wire, and one end of the pushing rod is provided with a pushing baffle ring which is in contact with the implantation ring.
The pushing rod is a 304 metal tube formed by laser cutting, the near end of the pushing rod is easy to break, the pushing baffle ring is a metal ring with a taper hole inside, and the releasing wire is a nickel-titanium wire which is shaped by heat treatment.
The pushing baffle ring and the pushing rod are formed by laser welding, and the stripping wire is arranged in the pushing rod.
Preferably, the pushing baffle ring is a ring with a taper hole inside, and the minimum diameter of the distal end of the taper section of the pushing baffle ring is larger than the diameter of the spherical head.
Preferably, the proximal maximum diameter of the pushing retainer cone section is smaller than the minimum diameter of the spiral spring-shaped structure of the releasing wire.
Preferably, an outer tube is arranged at the outer edge of the pushing rod.
The outer tube is PTFE pyrocondensation pipe, and outer tube pyrocondensation is on the push rod.
Preferably, the break release mechanism comprises a marker tube disposed at an end of the push rod remote from the release assembly.
The push rod and the release assembly are relatively fixed through pressing and holding, and the marking pipe is heat-shrunk on the push rod.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a novel mechanical release structure, wherein the distal release wire is detachably connected with the release assembly through a spiral spring-shaped structure, so that the processing precision and the assembly requirement of parts are reduced, the mechanical release structure is simple and easy to operate, the cost of the instrument is reduced, and the release reliability is improved.
The unique spring-shaped release structure is ingenious in design, the breaking point of the breaking release mechanism and the position of the release wire for breaking are separated, jamming or breakage is avoided during release, normal pushing and withdrawing of the conveying system can be achieved through the design, and the purpose of releasing the spring is achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the structure of FIG. 2A according to the present invention;
FIG. 4 is a schematic view of the implant structure of the present invention;
FIG. 5 is a schematic diagram of a pushing system according to the present invention;
FIG. 6 is a schematic diagram of a push ring structure according to the present invention;
FIG. 7 is a schematic diagram of a push ring structure according to the present invention;
fig. 8 is a schematic view of a broken structure of a proximally disposed break release mechanism of the pusher system of the present invention.
In the figure: 100. an implant; 100a, a spring ring; 100b, implanting a baffle ring; 100c, a release assembly; 100d, filaments; 200. a pushing system; 200a, pushing a rod; 200b, pushing the baffle ring; 200c, releasing the wires; 200d, an outer tube; 300. breaking off the release mechanism; 300a, marking the tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1-6, the present invention provides a technical solution: an embolic coil delivery system, comprising:
implant 100, including release member 100c, with a shaft portion of release member 100c extending beyond one end of implant 100 provided with a bulbous head;
the pushing system 200, comprising a release wire 200c, the release wire 200c being wrapped around the release assembly 100c near one end of the implant 100 to be detachably mounted on the release assembly 100c by a bulbous head;
the break release mechanism 300 is located at an end of the push system 200 remote from the implant 100, and the break-away wire 200c extends into the break release mechanism away from the bulbous head for breaking to effect detachment of the implant 100.
From distal to proximal, the implant 100 pushing system 200 breaks the release mechanism 300, which is in turn fixedly connected.
Specifically, the other end of the release assembly 100c is provided with an annular member and is connected with a filament 100d.
Specifically, an implantation baffle ring 100b is disposed at the outer edge of one end of the rod-shaped portion, which is close to the annular member, and a spring ring 100a is connected to the outer wall of the implantation baffle ring 100b.
In this embodiment, the coil 100a is wound from wire.
Specifically, the aperture of the implanted baffle ring 100b is smaller than the outer diameter of the annular member.
In this embodiment, the inner bore of the implanted stop ring 100b is smaller than the diameter of the release member 100c, such that the release member 100c cannot pass through the implanted stop ring 100b.
The release assembly 100c is made of 304 wire and the spring ring 100a and the implant stop ring 100b are connected by laser welding.
Specifically, the release wire 200c is disposed in a coil spring-like structure around the rod-like portion near one end of the implant 100.
Specifically, a push rod 200a is provided outside the release wire 200c, and one end of the push rod 200a is provided with a push stop ring 200b contacting the implant ring 100b.
In this embodiment, the pushing rod 200a and the release wire 200c are held and fixed at a distance of about 10cm from the proximal end.
Specifically, the pushing retainer ring 200b is a ring with a tapered hole inside, and the minimum diameter of the distal end of the tapered section of the pushing retainer ring 200b is larger than the diameter of the spherical head.
Specifically, the proximal maximum diameter of the tapered segment of push stop ring 200b is less than the minimum diameter of the coil spring-like structure of trip wire 200 c.
In this embodiment, the pushing rod 200a is formed by cutting 304 tubes with laser, so that the distal end is softer and is convenient for later assembly.
The pushing retainer ring 200b is a ring with a conical hole inside, and the minimum diameter of the end of the cone Duan Yuan needs to be larger than that of the spherical head, so that the spherical head can be smoothly separated from the releasing wire 200 c.
The maximum diameter of the proximal end of the cone section is required to be smaller than the minimum diameter of the spiral spring-shaped structure of the release wire 200c, so that the release wire 200c can be blocked for fixation.
Specifically, the outer edge of the push rod 200a is provided with an outer tube 200d.
Specifically, the break release mechanism 300 includes a marker tube 300a disposed at an end of the push rod 200a remote from the release assembly 200 c.
In this embodiment, the marker tube 300a is heat shrunk onto the push rod 200 a.
Fig. 7 shows the break release mechanism 300 in a broken away configuration, with the marker tube 300a broken away to expose the release assembly 200c, and the positional relationship of the break release mechanism 300 to the pusher system 200 is not shown here, where the break release mechanism 300 is disposed at an end of the pusher system 200 remote from the implant 100.
In use, filament 100d passes through the aperture of release assembly 100c, and release assembly 100c passes through implant stop ring 100b, completing the attachment of implant 100.
The release assembly 100c in the implant 100 is placed into the pushing system 200 through the pushing stop ring 200b, the distal end of the release wire 200c is wound on the release assembly 100c and is fixed by the spherical head of the release wire 200c, the proximal end of the release wire 200c is pressed and held with the pushing rod 200a together, and after the assembly is completed, the outer tube 200d is heat-shrunk on the pushing rod 200 a.
By the device, when in pushing, the implanted baffle ring 100b contacts with the pushing baffle ring 200b, so that the transmission of pushing force is completed, and the spring ring 100a is conveyed; during retraction, the release member 100c contacts the release wire 200c, and when the implant 100 is delivered to a predetermined position, the release wire 200c is retracted, the end is disengaged from the release member 100c, and the release is performed, at this time, the marker tube 300a of the breaking release mechanism 300 is broken, the release wire 200c is pulled out, the release member 100c is disengaged from the hole of the push stop ring 200b, and retraction after completion of the release is completed.
Embodiment two:
referring to fig. 7, the present invention further provides another technical solution: similar to the embodiment, the distal end of the trip wire 200c may be formed as a conical spring to facilitate assembly and improve stability, where F in fig. 7 refers to the direction of the force.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An embolic coil delivery system, comprising: comprising the following steps:
an implant (100) comprising a release assembly (100 c), wherein a rod-shaped part of the release assembly (100 c) extends out of one end of the implant (100) to be provided with a spherical head, and the other end of the release assembly (100 c) is provided with an annular part and is connected with a filament (100 d);
a pushing system (200) comprising a release wire (200 c), wherein a conical spring is formed at the distal end of the release wire (200 c), one end of the release wire (200 c) close to the implant (100) is wound on the release assembly (100 c) so as to be detachably mounted on the release assembly (100 c) through the spherical head, an implantation baffle ring (100 b) is arranged at the outer edge of one end of the rod-shaped part close to the annular part, a spring ring (100 a) is connected to the outer wall of the implantation baffle ring (100 b), and the aperture of the implantation baffle ring (100 b) is smaller than the outer diameter of the annular part;
a break release mechanism (300) at an end of the push system (200) remote from the implant (100), the break-away wire (200 c) extending into the break release mechanism away from the bulbous head for breaking to effect detachment of the implant (100);
one end of the release wire (200 c) close to the implant (100) is arranged into a spiral spring-shaped structure and is wound on the rod-shaped part;
the outside of release silk (200 c) is provided with push rod (200 a), the one end of push rod (200 a) be provided with implant keep off ring (100 b) contact push keep off ring (200 b).
2. An embolic coil delivery system as in claim 1, wherein: the pushing baffle ring (200 b) is a ring with a taper hole inside, and the minimum diameter of the distal end of the taper section of the pushing baffle ring (200 b) is larger than the diameter of the spherical head.
3. An embolic coil delivery system as in claim 1, wherein: the maximum diameter of the proximal end of the conical section of the pushing baffle ring (200 b) is smaller than the minimum diameter of the spiral spring-shaped structure of the releasing wire (200 c).
4. An embolic coil delivery system as in claim 1, wherein: an outer tube (200 d) is arranged at the outer edge of the pushing rod (200 a).
5. An embolic coil delivery system as in claim 4, wherein: the break release mechanism (300) includes a marker tube (300 a) disposed at an end of the push rod (200 a) remote from the release assembly (100 c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210102385.7A CN114469231B (en) | 2022-01-27 | 2022-01-27 | Embolic coil conveying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210102385.7A CN114469231B (en) | 2022-01-27 | 2022-01-27 | Embolic coil conveying system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114469231A CN114469231A (en) | 2022-05-13 |
| CN114469231B true CN114469231B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210102385.7A Active CN114469231B (en) | 2022-01-27 | 2022-01-27 | Embolic coil conveying system |
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| CN (1) | CN114469231B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115211924B (en) * | 2022-07-26 | 2024-04-05 | 苏州中天医疗器械科技有限公司 | Embolic coil, embolic coil assembly and method of use thereof |
| CN114948360B (en) * | 2022-07-29 | 2022-10-25 | 杭州亿科医疗科技有限公司 | Intratumoral turbulent flow device easy to assemble |
| CN116211380B (en) * | 2022-07-29 | 2023-07-14 | 杭州亿科医疗科技有限公司 | Spring coil release device convenient to operate |
| CN115054803B (en) * | 2022-08-18 | 2022-11-04 | 苏州美创医疗科技有限公司 | Implant releasing mechanism and conveying device with same |
| CN115607218B (en) * | 2022-09-28 | 2023-11-07 | 上海心玮医疗科技股份有限公司 | Mechanical release device for intratumoral implant |
| CN115674078B (en) * | 2022-09-29 | 2023-09-08 | 南京思脉德医疗科技有限公司 | Assembly tool and assembly process for spring ring pushing rod |
| CN115607219B (en) * | 2022-10-18 | 2023-11-24 | 南京思脉德医疗科技有限公司 | Release device of vascular embolism spring ring |
| CN116058904A (en) * | 2023-02-24 | 2023-05-05 | 上海微创医疗器械（集团）有限公司 | Spring ring conveying device and spring ring system |
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| US5234437A (en) * | 1991-12-12 | 1993-08-10 | Target Therapeutics, Inc. | Detachable pusher-vasoocclusion coil assembly with threaded coupling |
| CN101835430A (en) * | 2007-03-13 | 2010-09-15 | 微治疗公司 | An implant including a coil and a stretch-resistant member |
| CN105899151A (en) * | 2013-11-29 | 2016-08-24 | 德国Pfm医用产品有限公司 | System for connecting a medical implant to an insertion aid |
| CN106377292A (en) * | 2016-11-10 | 2017-02-08 | 珠海通桥医疗科技有限公司 | Embolic coil detaching device |
| CN209695281U (en) * | 2018-09-17 | 2019-11-29 | 南京沃福曼医疗科技有限公司 | A kind of embolism spring ring conveying device escape wire position limiting structure |
| CN211131221U (en) * | 2019-07-12 | 2020-07-31 | 上海小鱼医疗科技有限公司 | Snap-off type embolism intervention instrument |
| CN211131220U (en) * | 2019-07-12 | 2020-07-31 | 上海小鱼医疗科技有限公司 | Embolism spring ring device that can mechanically disengage |
| CN111870303A (en) * | 2020-08-06 | 2020-11-03 | 聚辉医疗科技(深圳)有限公司 | Embolization device |
| CN112274209A (en) * | 2020-12-29 | 2021-01-29 | 北京泰杰伟业科技有限公司 | Spring ring conveying and releasing system |
| CN113397642A (en) * | 2021-08-02 | 2021-09-17 | 珠海通桥医疗科技有限公司 | Vascular embolism spring coil system |
| CN215384340U (en) * | 2021-12-08 | 2022-01-04 | 北京美中双和医疗器械股份有限公司 | Releasable embolic coil system |
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