CN114469231A - Embolic coil conveying system - Google Patents
Embolic coil conveying system Download PDFInfo
- Publication number
- CN114469231A CN114469231A CN202210102385.7A CN202210102385A CN114469231A CN 114469231 A CN114469231 A CN 114469231A CN 202210102385 A CN202210102385 A CN 202210102385A CN 114469231 A CN114469231 A CN 114469231A
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- Prior art keywords
- release
- implant
- embolic coil
- delivery system
- ring
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- 230000003073 embolic effect Effects 0.000 title claims abstract description 24
- 239000007943 implant Substances 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000002513 implantation Methods 0.000 claims description 13
- 239000003550 marker Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 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
- 238000003466 welding Methods 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical group [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007917 intracranial administration Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000002560 therapeutic procedure 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
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000000338 in vitro Methods 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
- 230000003902 lesion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000002093 peripheral effect Effects 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
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000011282 treatment 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
- 238000004804 winding Methods 0.000 description 1
Images
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
Abstract
The invention discloses an embolic coil delivery system, belonging to the technical field of medical instruments, the embolic coil delivery system comprises: the implant comprises a release component, wherein a rod-shaped part of the release component extends out of one end of the implant and is provided with a spherical head; a pusher system comprising a release wire wound around the release member proximate an end of the implant for detachable mounting on the release member by the bulbous head; and the breaking release mechanism is positioned at one end of the pushing system far away from the implant, and the release wire extends into the breaking release mechanism far away from the spherical head part to realize the separation of the implant by breaking. The invention provides a novel mechanical releasing structure, wherein a releasing wire at the far end is detachably connected with a releasing component through a spiral spring-shaped structure, so that the processing precision and the assembly requirement of parts are reduced, and the releasing reliability is improved.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to an embolic coil delivery system.
Background
Percutaneous treatment of a wide variety of intravascular pathologies is an increasingly popular treatment modality. Embolic coil therapy is a common clinical instrument, and the amount and range of usage is increasing. From intracranial aneurysms to peripheral vessels to tumor therapy, embolic coils play an important role in promoting thrombosis, preventing bleeding from aneurysms or cutting off blood supply to tumors, etc.
Embolic coils are typically composed of two parts, including a pusher system for delivery and a coil for implantation. After the percutaneous vascular puncture operation, the spring coil is conveyed to a preset position through a multi-stage conveying catheter. Taking intracranial implantation as an example, a guiding catheter is inserted into a puncture sheath, the distal end of the guiding catheter reaches an ideal position and then is placed into an intermediate catheter, and finally, a microcatheter for intracranial use is placed. After the microcatheter reaches the lesion site, the microcatheter can be placed in the embolic coil system, and after the coil reaches the predetermined position, the device needs to be operated in vitro to separate the pushing system from the coil.
There are several solutions on the market today, such as mechanical disengagement (having a mechanical locking mechanism inside, which is unlocked by external operation), electrolytic disengagement (melting the joint by energizing), hydrolytic disengagement (melting the joint after contact with water), etc.
However, the above-mentioned releasing method has various problems:
and (3) electrolytic desorption: the release time is long, and a matched power supply device is needed. The blood vessel can pass current, and the temperature is increased, so that the damage to the blood vessel or the blood flow environment is caused.
Hydrolysis and dehydration: the spring ring is released by introducing a solvent into the conveying pipe for dissolution, the problem of unstable release mode exists, the pressure of the blood vessel is easily increased by injecting the solvent, and the spring ring cannot be released if the injection amount of the solvent is insufficient, so that the release is difficult to realize.
The mechanical release has high realizability with little damage to human bodies, but has high requirements on processing precision, high requirements on structural assembly and easy structural failure, and in addition, the release wire is usually pulled by a manual breaking or releasing device at the proximal end of the conveying system in the conveying system to achieve the purpose of releasing the spring ring in the products on the market, such as the embolic spring ring system proposed by CN113413186A, the processing precision is high, and serious consequences can occur once the release wire is blocked or broken.
Disclosure of Invention
It is an object of the present invention to provide an embolic coil delivery system that solves the problems set forth in the background above in the use of existing embolic coil delivery systems.
In order to achieve the purpose, the invention provides the following technical scheme: an embolic coil delivery system comprising:
the implant comprises a release component, wherein a rod-shaped part of the release component extends out of one end of the implant and is provided with a spherical head;
a pusher system comprising a release wire wound around the release member proximate an end of the implant for detachable mounting on the release member by the bulbous head;
and the breaking release mechanism is positioned at one end of the pushing system far away from the implant, and the release wire extends into the breaking release mechanism far away from the spherical head part to realize the separation of the implant by breaking.
The raw material of the release wire is nickel-titanium wire, the far end of the release wire is ground and reduced in diameter, the grinding section is wound on a thermal treatment tool for shaping, and finally the release wire is formed.
According to the common convention in the field of medical instruments, the term "proximal end" refers to the end of the medical instrument close to a doctor when the doctor uses the medical instrument; "distal" refers to the end of the medical device that is distal from the clinician using the medical device.
The distal end in this case may be said to mean the end of the device near the implant.
The spring ring is formed by coiling alloy and is formed into a certain shape through heat treatment processing.
Preferably, the other end of the release member is provided with an annular member and a filament is attached thereto.
The filaments are made of a polymer material.
The implant stop ring is a 304 metal ring with a smaller bore diameter than the annular member of the release assembly.
Preferably, the outer edge of one end of the rod-shaped part, which is close to the annular part, is provided with an implantation retaining ring, and the outer wall of the implantation retaining ring is connected with a spring ring.
The release assembly is made of 304, one end of the rod-shaped part is connected with the spherical head part, the other end of the rod-shaped part is connected with the annular part, and the spring ring is connected with the implantation retaining ring through welding.
Preferably, the diameter of the hole of the implantation baffle ring is smaller than the outer diameter of the annular component.
Preferably, one end of the release wire close to 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 stop ring 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 subjected to heat treatment and shaping.
The pushing stop ring and the pushing rod are formed by laser welding, and the releasing wire is arranged in the pushing rod.
Preferably, the pushing baffle ring is a ring with a conical hole inside, and the minimum diameter of the distal end of the conical section of the pushing baffle ring is larger than the diameter of the spherical head.
Preferably, the maximum diameter of the proximal end of the conical section of the pushing baffle ring is smaller than the minimum diameter of the spiral spring-shaped structure of the release wire.
Preferably, the outer edge of the push rod is provided with an outer pipe.
The outer tube is a PTFE heat-shrinkable tube and is heat-shrunk on the push rod.
Preferably, the break-off 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 thermally shrunk on the push rod.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a novel mechanical releasing structure, the releasing wire at the far end is detachably connected with a releasing component through a spiral spring-shaped structure, the processing precision and the assembly requirement of parts are reduced, the mechanical releasing structure is simple and easy to operate, the instrument cost is reduced, and the releasing reliability is improved.
The unique spring-shaped releasing structure is ingenious in design, the breaking point of the breaking releasing mechanism and the releasing wire can be separated from the breaking position, the blockage or the breakage in the releasing process is avoided, the normal pushing and withdrawing of the conveying system can be realized through the design, and the purpose of releasing the spring is achieved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the present invention;
FIG. 3 is a schematic cross-sectional view taken at A in FIG. 2 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 view of a push baffle ring according to the present invention;
FIG. 7 is a schematic view of a push baffle ring according to the present invention;
FIG. 8 is a schematic view of a break-away configuration of the proximal end of the pusher system of the present invention with a break release mechanism.
In the figure: 100. an implant; 100a, a spring ring; 100b, implanting a baffle ring; 100c, a release assembly; 100d, filaments; 200. a push system; 200a, a push rod; 200b, pushing a baffle ring; 200c, releasing the silk; 200d, an outer tube; 300. a break release mechanism; 300a, marking the tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-6, the present invention provides a technical solution: an embolic coil delivery system comprising:
the implant 100 comprises a release component 100c, wherein a rod part of the release component 100c extends out of one end of the implant 100 and is provided with a spherical head part;
a pusher system 200 comprising a release wire 200c, one end of the release wire 200c near the implant 100 being wound around the release member 100c to be detachably mounted on the release member 100c by a bulbous head;
a break-off release mechanism 300 located at an end of the pusher system 200 distal to the implant 100, the release wire 200c extending into the break-off release mechanism distal to the bulbous head for breaking off to effect separation of the implant 100.
Distally to proximally, the implant 100 pusher system 200 is in turn fixedly connected to the break release mechanism 300.
Specifically, the other end of the release assembly 100c is provided with a loop member and a filament 100d is attached.
Specifically, an implantation stop ring 100b is arranged at the outer edge of one end of the rod-shaped part close to the annular part, and a spring ring 100a is connected to the outer wall of the implantation stop ring 100 b.
In this embodiment, the spring coil 100a is formed by winding a wire.
Specifically, the aperture of the implant baffle 100b is smaller than the outer diameter of the annular member.
In this embodiment, the inner bore of the implant stop 100b is smaller than the diameter of the release member 100c so that the release member 100c cannot pass through the implant stop 100 b.
The release member 100c is made of 304 wire and the spring ring 100a and implant stop ring 100b are joined by laser welding.
Specifically, one end of the release wire 200c near the implant 100 is provided in a coil spring-like structure, wound around the rod-shaped portion.
Specifically, the outside of the release wire 200c is provided with a push rod 200a, and one end of the push rod 200a is provided with a push stopper 200b contacting with the implant ring 100 b.
In this embodiment, the pushing rod 200a and the releasing wire 200c are pressed and fixed at a distance of about 10cm from the proximal end.
Specifically, the pushing stopper 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 stopper ring 200b is larger than the diameter of the spherical head.
Specifically, the maximum diameter of the proximal end of the tapered section of the push baffle ring 200b is smaller than the minimum diameter of the coil spring-like structure of the release wire 200 c.
In this embodiment, the push rod 200a is formed by cutting 304 tubes with laser, so that the distal end is softer, and later-stage assembly is facilitated.
The pushing baffle ring 200b is a ring with a taper hole inside, and the minimum diameter of the far end of the taper section needs to be larger than the diameter of the spherical head, so that the spherical head can be smoothly separated from the release wire 200 c.
The maximum diameter of the proximal end of the tapered section needs to be smaller than the minimum diameter of the coil spring-like structure of the release wire 200c, so that the release wire 200c can be blocked and fixed.
Specifically, the outer edge of the pushing rod 200a is provided with an outer tube 200 d.
In particular, the break-off release mechanism 300 includes a marker tube 300a disposed at an end of the push rod 200a distal from the release member 200 c.
In this embodiment, the marking tube 300a is heat shrunk onto the push rod 200 a.
FIG. 7 illustrates the broken-off release mechanism 300 in a configuration in which the marker tube 300a is broken away to expose the release member 200c, and the positional relationship of the break-off release mechanism 300 to the pusher system 200 is not shown, where the break-off release mechanism 300 is disposed at an end of the pusher system 200 distal to the implant 100.
In use, the filament 100d is passed through the aperture of the release member 100c and the release member 100c is passed through the implant stop 100b to complete the attachment and fixation of the implant 100.
The release assembly 100c of the implant 100 is inserted into the pushing system 200 through the pushing stop ring 200b, the distal end of the releasing wire 200c is wound around the release assembly 100c and fixed by the spherical head of the releasing wire 200c, the proximal end of the releasing wire 200c is then pressed and fixed with the pushing rod 200a, and the outer tube 200d is heat-shrunk on the pushing rod 200a after the assembly is completed.
By the device, when the spring ring is pushed, the implantation baffle ring 100b is contacted with the pushing baffle ring 200b to finish the transmission of the pushing force and convey the spring ring 100 a; when the release assembly 100c is retracted, the release wire 200c is contacted with the release member 200c, when the implant 100 is conveyed to a preset position, the release wire 200c is retracted, the end part is separated from the release assembly 100c to release, the marking tube 300a of the breaking release mechanism 300 is disconnected at the moment, the release wire 200c is pulled out, the release assembly 100c is separated from the hole of the pushing stop ring 200b, and the implant is retracted after the release is completed.
Example two:
referring to fig. 7, the present invention further provides another technical solution: similar to the embodiment, the distal end of the release wire 200c may be formed as a tapered spring to facilitate assembly and improve stability, and F in fig. 7 indicates the direction of the force.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An embolic coil delivery system, comprising: the method comprises the following steps:
the implant (100) comprises a release component (100c), and a spherical head is arranged at one end of the rod-shaped part of the release component (100c) extending out of the implant (100);
a push system (200) comprising a release wire (200c), the release wire (200c) being wound on the release member (100c) near one end of the implant (100) to be detachably mounted on the release member (100c) by the bulbous head;
a break-off release mechanism (300) located at an end of the pusher system (200) distal to the implant (100), the release wire (200c) extending into the break-off release mechanism distal to the bulbous head for breaking off to effect separation of the implant (100).
2. The embolic coil delivery system of claim 1, wherein: the other end of the release member (100c) is provided with a ring-shaped member and connected with a filament (100 d).
3. The embolic coil delivery system of claim 2, wherein: an implantation retaining ring (100b) is arranged on the outer edge of one end, close to the annular part, of the rod-shaped part, and a spring ring (100a) is connected to the outer wall of the implantation retaining ring (100 b).
4. The embolic coil delivery system of claim 3, wherein: the bore diameter of the implant collar (100b) is smaller than the outer diameter of the annular member.
5. The embolic coil delivery system of claim 1, wherein: the release wire (200c) is arranged in a coil spring-like structure near one end of the implant (100) and wound around the rod-shaped portion.
6. The embolic coil delivery system of claim 1, wherein: the outside of the release wire (200c) is provided with a pushing rod (200a), and one end of the pushing rod (200a) is provided with a pushing stop ring (200b) which is in contact with the implantation ring (100 b).
7. The embolic coil delivery system of claim 6, wherein: the pushing stop ring (200b) is a ring with a taper hole in the inner part, and the minimum diameter of the far end of the taper section of the pushing stop ring (200b) is larger than the diameter of the spherical head.
8. The embolic coil delivery system of claim 7, wherein: the maximum diameter of the proximal end of the conical section of the pushing baffle ring (200b) is smaller than the minimum diameter of the spiral spring-shaped structure of the release wire (200 c).
9. The embolic coil delivery system of claim 6, wherein: an outer tube (200d) is arranged on the outer edge of the push rod (200 a).
10. The embolic coil delivery system of claim 9, wherein: the break-off release mechanism (300) comprises a marker tube (300a) disposed at an end of the push rod (200a) distal to the release assembly (200 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 true CN114469231A (en) | 2022-05-13 |
| CN114469231B CN114469231B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210102385.7A Active CN114469231B (en) | 2022-01-27 | 2022-01-27 | Embolic coil conveying system |
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| CN (1) | CN114469231B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114948360A (en) * | 2022-07-29 | 2022-08-30 | 杭州亿科医疗科技有限公司 | Intratumoral turbulent flow device easy to assemble |
| CN115054803A (en) * | 2022-08-18 | 2022-09-16 | 苏州美创医疗科技有限公司 | Implant releasing mechanism and conveying device with same |
| CN115211924A (en) * | 2022-07-26 | 2022-10-21 | 苏州中天医疗器械科技有限公司 | Embolic coil, embolic coil assembly and use method thereof |
| CN115607219A (en) * | 2022-10-18 | 2023-01-17 | 南京思脉德医疗科技有限公司 | Release device for vascular embolism spring ring |
| CN115607218A (en) * | 2022-09-28 | 2023-01-17 | 上海心玮医疗科技股份有限公司 | Mechanical releasing device for intratumoral implant |
| CN115674078A (en) * | 2022-09-29 | 2023-02-03 | 南京思脉德医疗科技有限公司 | Assembly tool and assembly process for spring ring pushing rod |
| CN116211380A (en) * | 2022-07-29 | 2023-06-06 | 杭州亿科医疗科技有限公司 | Spring coil release device convenient to operate |
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