CN114668440A - Embolism spring ring - Google Patents
Embolism spring ring Download PDFInfo
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- CN114668440A CN114668440A CN202011548271.2A CN202011548271A CN114668440A CN 114668440 A CN114668440 A CN 114668440A CN 202011548271 A CN202011548271 A CN 202011548271A CN 114668440 A CN114668440 A CN 114668440A
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- 208000005189 Embolism Diseases 0.000 title description 34
- 230000003073 embolic effect Effects 0.000 claims abstract description 54
- 238000005452 bending Methods 0.000 claims abstract description 49
- 206010002329 Aneurysm Diseases 0.000 abstract description 58
- 230000010102 embolization Effects 0.000 description 39
- 210000001367 artery Anatomy 0.000 description 22
- 238000000034 method Methods 0.000 description 19
- 230000008569 process Effects 0.000 description 17
- 230000002792 vascular Effects 0.000 description 14
- 230000007423 decrease Effects 0.000 description 13
- 238000012545 processing Methods 0.000 description 10
- 230000006872 improvement Effects 0.000 description 9
- 201000008450 Intracranial aneurysm Diseases 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000004904 shortening Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 238000001361 intraarterial administration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000032170 Congenital Abnormalities Diseases 0.000 description 1
- 238000012276 Endovascular treatment Methods 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 208000032851 Subarachnoid Hemorrhage Diseases 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 210000004004 carotid artery internal Anatomy 0.000 description 1
- 208000026106 cerebrovascular disease Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007428 craniotomy Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 230000000004 hemodynamic effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007917 intracranial administration Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- ZONODCCBXBRQEZ-UHFFFAOYSA-N platinum tungsten Chemical compound [W].[Pt] ZONODCCBXBRQEZ-UHFFFAOYSA-N 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 210000002385 vertebral artery Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
-
- 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
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
- A61B17/12154—Coils or wires having stretch limiting means
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- 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 provides a embolic coil spring, which comprises a coil spring body and an anti-untwisting wire arranged in the coil spring body, wherein the wire diameter of the anti-untwisting wire at the near end is smaller than that of the far end; the anti-unwinding line comprises a bending section, the near end of the bending section is fixedly connected to the near end of the spring ring body, and the far end of the bending section is fixedly connected to the far end of the spring ring body; or the anti-unwinding line comprises a bent section and a straight section, the near end of the bent section is fixedly connected to the near end of the spring ring body, the far end of the bent section is connected to the near end of the straight section, and the far end of the straight section is fixedly connected to the far end of the anti-unwinding line. According to the embolic coil, a certain extension allowance is provided for the anti-unwinding line through the matching of the bending section or the bending section and the straight line section, and the line diameter of the near end of the anti-unwinding line is reduced, so that the flexibility of the near end of the anti-unwinding line is improved, the embolic coil body is prevented from being extended and hardened when being extruded in an aneurysm cavity, and the condition that the embolic coil kicks out the automatic aneurysm cavity of a delivery catheter is avoided.
Description
Technical Field
The invention relates to the technical field of interventional medical instruments, in particular to an embolic coil.
Background
Intracranial aneurysm is abnormal bulging formed by gradual expansion of intracranial arterial blood vessels under the action of hemodynamic load or other factors, and is caused by congenital abnormality or acquired injury and other factors, once the intracranial aneurysm ruptures and bleeds, the lethal and disabling rate is extremely high, the intracranial aneurysm is a cerebrovascular disease with high morbidity and high mortality, and is a main reason for causing subarachnoid hemorrhage, the mortality rate of the ruptured intracranial aneurysm reaches 51%, and the disabling rate of survivors approaches 50%.
There are currently two ways to clinically treat intracranial aneurysms: one is surgical craniotomy, clamping or ligating aneurysms, which has the disadvantages of long operation time and large wound of patients, and is also very difficult to treat aneurysms at special parts such as internal carotid artery, vertebral artery main stem and the like by surgical operation; the other is interventional endovascular treatment, which has the advantages of minimal invasion, safety and effectiveness, and becomes the preferred clinical treatment scheme of many medical experts at present, and the most applied at present is percutaneous vascular puncture under the guidance of X-ray, embolize the embolic coil into the aneurysm cavity through a delivery catheter, and close the aneurysm formation entity.
But at the embolism in-process, along with the embolism spring coil fills into the length in the aneurysm chamber longer and longer, the space that can supply the embolism spring coil to fill in the aneurysm intracavity is littleer and smaller, especially embolism later stage, the extrusion that the embolism spring coil received in filling into the aneurysm chamber is more and more serious, can lead to the embolism spring coil to extend the sclerosis, the condition in the embolism spring coil will be played the aneurysm chamber to carrying the intraarterial with the pipe with carrying, lead to the embolism to fail, the tail end of embolism spring coil can be perpendicular to carrying the intraarterial and cause the vascular embolism, consequently need take out this embolism spring coil and replace refill behind the new embolism spring coil, thereby prolong operation time, increase operation risk and patient's misery.
Disclosure of Invention
In order to solve the technical problem, the invention provides an embolic coil, which aims to solve the problem that the embolic coil easily kicks out an automatic aneurysm cavity of a delivery catheter to a parent artery during embolization.
In order to achieve one of the above objects, an embodiment of the present invention provides an embolic coil comprising a coil body and an anti-unwinding wire disposed within the coil body, the anti-unwinding wire having a proximal end with a smaller wire diameter than a distal end;
the anti-unwinding line comprises a bent section, the near end of the bent section is fixedly connected to the near end of the spring ring body, and the far end of the bent section is fixedly connected to the far end of the spring ring body;
or, the anti-unwinding line comprises a bending section and a straight section, the near end of the bending section is fixedly connected to the near end of the spring ring body, the far end of the bending section is connected to the near end of the straight section, and the far end of the straight section is fixedly connected to the far end of the anti-unwinding line.
As a further improvement of an embodiment of the present invention, the wire diameter of the anti-unraveling wire is tapered from the distal end to the proximal end.
As a further improvement of an embodiment of the present invention, a wire length of the proximal unit length of the anti-unraveling wire is longer than a wire length of the distal unit length in the distal-proximal direction of the anti-unraveling wire.
As a further improvement of an embodiment of the present invention, a line length per unit length of the anti-unraveling line gradually increases from a distal end to a proximal end in a distal-proximal direction of the anti-unraveling line.
As a further improvement of an embodiment of the present invention, the curved section is a variable pitch helix, and the pitch of the curved section is gradually reduced from the distal end to the proximal end.
As a further improvement of an embodiment of the present invention, the curved section is a wave line of the same height, and the distance between adjacent peaks of the curved section gradually decreases from the distal end to the proximal end.
In a further improvement of an embodiment of the present invention, the anti-unraveling line is a line of constant-height serrations, and a pitch between adjacent serrations of the anti-unraveling line gradually decreases from the distal end to the proximal end.
In a further improvement of an embodiment of the present invention, a line length of the anti-unwinding line is 105 to 150% of a line length thereof in the distal-proximal direction.
In a further improvement of an embodiment of the present invention, the wire diameter of the anti-unraveling wire is 0.02 to 0.1 mm.
In a further improvement of an embodiment of the present invention, the wire diameter of the anti-unraveling wire is 0.03 to 0.06 mm.
Compared with the prior art, the invention has the following beneficial effects: the embolic coil of the invention, the bending section provides a certain extension allowance for the anti-despiral line, in the process of embolization, when the coil body is extruded and extended in the aneurysm cavity, the anti-despiral line can be extended, thereby avoiding the extension hardening of the coil body, and the line diameter of the near end of the anti-despiral line is reduced, thereby improving the flexibility of the near end, further relieving the hardening of the near end of the coil body in the process of embolization, especially in the later stage of embolization, so as to prevent the extension hardening of the near end of the coil body under the combined action of the two, thereby preventing the condition that the near end of the embolic coil kicks out the automatic aneurysm cavity of the delivery catheter to the parent artery caused by the kicking of the near end of the embolic coil into the aneurysm cavity to lead the tail end of the embolic coil to hang down in the parent artery, thereby causing vascular embolization, greatly shortening the operation time, and reducing the operation risk, the pain of the patient is relieved; through the cooperation of bending section and straightway, can be different to the distal end of embolism spring coil and the near-end by the extrusion condition, and make the extension allowance distribution of anticycloid near-end and distal end different, reduced the processing degree of difficulty.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a partially sectioned diagrammatic view of the distal portion of an embolic coil in accordance with example 1 of the present invention;
FIG. 2 is a schematic structural view of an anti-unwinding line according to example 1 of the present invention;
FIG. 3 is a schematic structural view of an anti-unwinding line according to example 2 of the present invention;
FIG. 4 is a schematic structural view of an anti-unwinding line according to embodiment 3 of the present invention;
FIG. 5 is a schematic structural view of an anti-unwinding line according to example 4 of the present invention;
FIG. 6 is a schematic structural view of an anti-unwinding line according to example 5 of the present invention;
FIG. 7 is a schematic structural view of an anti-unwinding line according to example 6 of the present invention;
fig. 8 is a schematic structural view of a sizing device in embodiment 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. 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 application.
In the various drawings of the present invention, certain dimensions of structures or portions are exaggerated relative to other structures or portions for ease of illustration and, therefore, are used only to illustrate the basic structure of the subject matter of the present invention.
Example 1
Referring to fig. 1, the invention provides a embolic coil spring 100, comprising a coil spring body 1 and an anti-unwinding line 2 disposed in the coil spring body 1, wherein the near end of the anti-unwinding line 2 is fixedly connected to the near end of the coil spring body 1 through a first connecting portion disposed at the near end, and the far end of the anti-unwinding line 2 is fixedly connected to the far end of the coil spring body 1 through a second connecting portion disposed at the far end, i.e., the two ends of the anti-unwinding line 2 are respectively connected to the two ends of the coil spring body 1, thereby limiting the unwinding of the coil spring body 1.
In the present invention, the terms "distal" and "proximal" should be understood as meaning that the proximal end is the end facing the clinician and the distal end is the end facing away from the clinician, as viewed from the direction of the clinician, the direction indicated by the arrows in the figure being the direction from the distal end to the proximal end.
The first connecting portion and the second connecting portion of the anti-untwisting wire 2 can be fixedly connected to the spring ring body 1 through welding, tying or glue bonding and the like, and the glue can be instant dry glue, epoxy glue or UV glue and other medical glue.
Wherein the diameter of the primary spiral of the spring ring body 1 is 0.22-0.5 mm, so as to fill the aneurysm cavity; the spring coil body 1 is made of a shape memory material, preferably platinum-tungsten alloy. The material of the anti-unwinding thread 2 can be selected from PP, POE, PET, nylon and the like.
It should be understood that each embolic coil 100, coil body 1, and anti-unwinding wire 2 described in the present invention and shown in the figures are all in their straightened state in the proximal-distal direction, and will bend synchronously with the environment and external forces during use and movement.
In embolization, the embolic coil 100 is delivered to the aneurysm cavity through a delivery catheter under the guidance of X-rays, i.e., the delivery catheter is delivered to its distal end into the aneurysm cavity, and then the embolic coil 100 is pushed to gradually enter the aneurysm cavity from the distal end to the proximal end and fill.
Referring to fig. 1-2, in the present embodiment, the anti-unwinding wire 2 comprises a curved section, the proximal end of the curved section is fixedly connected to the proximal end of the spring coil body 1, the distal end of the curved section is fixedly connected to the distal end of the spring coil body 1, and the diameter of the proximal end of the anti-unwinding wire 2 is smaller than that of the distal end. Thus, the bending section provides a certain extension allowance for the anti-untwisting line 2, in the embolization process, when the spring coil body 1 is extruded and extended in the aneurysm cavity, the anti-untwisting line 2 can be extended, so that the extension hardening of the spring coil body 1 is avoided, the line diameter of the near end of the anti-untwisting line 2 is reduced, the flexibility of the near end is improved, the condition that the conveying catheter is automatically kicked out of the aneurysm cavity to the parent artery by the near end of the embolization spring coil 100 in the embolization process, particularly in the later embolization stage, the hardening of the near end of the spring coil body 1 can be prevented by the combined action of the two, the condition that the near end of the embolization spring coil 100 cannot be conveyed into the aneurysm cavity and the tail end of the embolization spring coil is perpendicular to the parent artery to cause vascular embolization is avoided, the operation time is greatly shortened, and the operation risk is reduced, the pain of the patient is relieved.
Furthermore, the wire diameter of the anti-unwinding wire 2 gradually decreases from the distal end to the proximal end, so that the flexibility of the anti-unwinding wire 2 from the distal end to the proximal end becomes better and better, the flexibility of the embolic coil 100 can be improved pertinently according to the difference of the extrusion degree of the embolic coil 100 from the distal end to the proximal end, the hardness of the embolic coil 100 is reduced section by section from the distal end to the proximal end, particularly the hardness of the proximal end of the embolic coil 100 can be reduced remarkably, the problem that the hardness of the coil body 1 gradually increases from the distal end to the proximal end due to the fact that the embolic coil 100 is extruded more and more seriously due to the smaller and smaller space in the aneurysm cavity in the embolization process is solved, the situation that the embolic coil 100 kicks out the automatic aneurysm cavity of the delivery catheter into the parent artery due to the above is prevented, and vascular embolism caused by the fact that the proximal end of the embolic coil 100 cannot be delivered into the aneurysm cavity and the tail end of the embolic coil is perpendicular to the parent artery, greatly shortens the operation time, reduces the operation risk and relieves the pain of patients.
It is understood that the wire diameter of the anti-unwinding wire 2 described herein gradually decreases from the distal end to the proximal end, the wire diameter of the anti-unwinding wire 2 may continuously decrease from the distal end to the proximal end, the wire diameter of the anti-unwinding wire 2 may gradually decrease from the distal end to the proximal end, or the wire diameter of the anti-unwinding wire 2 may gradually decrease from the distal end to the proximal end or may otherwise decrease, as long as the flexibility of the anti-unwinding wire 2 from the distal end to the proximal end is better.
Furthermore, in the far and near direction of the anti-untwisting line 2, the far and near direction is the direction from the far end to the near end of the anti-untwisting line 2, and the line length of the unit length of the near end of the anti-untwisting line 2 is larger than that of the unit length of the far end, so that the anti-untwisting line 2 not only has the extension allowance, but also greatly improves the extension amount of the near end, and relieves the hardening caused by the extension of the near end of the spring ring body 1 in the embolization process, especially in the late embolization period, thereby preventing the condition that the near end of the embolization spring ring 100 kicks out the automatic aneurysm cavity of the delivery catheter to the parent artery caused by the extension, avoiding the condition that the near end of the embolization spring ring 100 cannot be delivered into the aneurysm cavity and the tail end of the embolization spring ring hangs down in the parent artery to cause vascular embolization, greatly shortening the operation time, reducing the operation risk and relieving the patient pain.
Preferably, in the direction of the distal end and the proximal end of the anti-unwinding wire 2, the wire length of the anti-unwinding wire 2 per unit length is gradually increased from the distal end to the proximal end, that is, the extendable amount of the anti-unwinding wire 2 from the distal end to the proximal end is gradually increased, so that the extendable allowance of the spring coil body 1 from the distal end to the proximal end is gradually increased, in the process of embolization, when the spring coil body 1 is extended due to different extrusion degrees in the aneurysm cavity, the distal end and the proximal end of the anti-unwinding wire 2 can correspondingly provide enough extendable allowance, especially, the problem that the extendable allowance required by the proximal end of the anti-unwinding wire 2 is larger than the extendable allowance required by the distal end of the anti-unwinding wire can be improved, the extendable amount of the proximal end of the embolic spring coil 100 is remarkably increased, and the problem that the embolic spring coil 100 is increasingly seriously extruded due to the smaller and smaller space in the aneurysm cavity in the process is solved, thereby preventing the condition that the embolism spring ring 100 caused by the above kicks out the automatic aneurysm cavity of the delivery catheter to the parent artery, avoiding the situation that the near end of the embolism spring ring 100 can not be delivered into the aneurysm cavity and the tail end of the embolism spring ring hangs down in the parent artery to cause the vascular embolism, greatly shortening the operation time, reducing the operation risk and alleviating the pain of the patient.
Furthermore, the length of the anti-unwinding line 2 is 105-150% of the linear length of the anti-unwinding line in the far and near direction, so that the anti-unwinding line 2 can be extended, particularly, the extensible amount of the anti-unwinding line 2 is gradually increased from the far end to the near end in the range, the straightening and hardness increase of the spring coil body 1 caused by the length limitation of the anti-unwinding line 2 in the embolization process can be prevented, the rest part of the embolic spring coil 100 cannot be conveyed into an aneurysm, the tail end of the embolic spring coil 100 is perpendicular to the parent artery to cause the vascular embolization, and the unwinding of the spring coil body 1 in the embolization process can be prevented.
Further, the wire diameter of the anti-unwinding wire 2 is 0.02-0.1 mm, preferably, the wire diameter of the anti-unwinding wire 2 is 0.03-0.06 mm, so that the unwinding of the spring coil body 1 in the embolization process can be prevented on the one hand, and on the other hand, the anti-unwinding wire 2 can be ensured to have certain flexibility, especially, the wire diameter of the anti-unwinding wire 2 is gradually reduced from the far end to the near end in the range, so that the embolization spring coil 100 can be prevented from kicking out the conveying catheter from the aneurysm inlet to the parent artery, and then the rest part of the embolization spring coil 100 cannot be conveyed into the aneurysm, and the tail end of the embolization spring coil 100 is perpendicular to the parent artery to cause vascular embolization and the like.
Referring to FIG. 2, in particular, in the present embodiment, the bending section is provided as a spiral line, and the pitch of the spiral line is 0.2-1 mm.
Preferably, the helix is pitch-variable, and the pitch of the curved segment tapers from the distal end to the proximal end, that is, the density of the spiral coil of the bending section is gradually increased from the far end to the near end, namely, the extensibility of the anti-unwinding line 2 is gradually increased from the far end to the near end, so that the extensibility of the spring coil body 1 is gradually increased from the far end to the near end, in the process of embolism, when the spring coil body 1 is extruded in the aneurysm cavity to extend, the anti-unwinding wire 2 may correspondingly provide sufficient elongation margin at various positions from the distal end to the proximal end, thereby purposefully improving the increased compression of the embolic coil 100 due to the increased length of the embolic coil 100 into the aneurysm cavity, and then the problem that the hardness of the spring coil body 1 gradually increases from the far end to the near end is caused, so that the embolic spring coil 100 is prevented from kicking the delivery catheter out of the entrance of the aneurysm cavity into the parent artery.
The helix of crooked section can set up to the constant diameter to the size of adaptation spring coil body 1 reduces the processing degree of difficulty.
Preferably, the curved section is configured to be tapered such that the helical diameter of the curved section increases from the distal end to the proximal end, thereby further increasing the elongation margin of the embolic coil 100.
When processing, can with the bending section twines carries out heat setting on the rod and prepares into the helix, and the design temperature is 80 ~ 130 ℃, and the design time is 15 ~ 120min, can control through the winding density degree the pitch of bending section diminishes from the distal end to the near-end gradually, can also further control the diameter of anti-thread diameter of separating of spiral line 2 through the diameter of selecting the rod, for example can realize through the diameter grow gradually of selecting the rod the thread diameter of bending section grows gradually from the near-end to the distal end. Of course, other shaping methods can be used to process the bending section as long as the shape and size of the bending section can meet the requirements.
Example 2
Referring to fig. 3, another embodiment of the present invention is shown, and the difference between the embodiment 2 and the embodiment 1 is:
the bending section is set to be a wavy line, the wave amplitude is 0.05-1 mm, and the distance between adjacent wave crests of the bending section is gradually reduced from the far end to the near end, namely, the wave crest density of the bending section is gradually increased from the far end to the near end, so that the extensibility of the anti-unwinding line 2 is gradually increased from the far end to the near end, and the extension allowance of the spring coil body 1 is gradually increased from the far end to the near end, in the embolization process, when the spring coil body 1 is extruded in an aneurysm cavity in different degrees, the anti-unwinding line 2 can correspondingly provide enough extension allowance from the far end to different positions of the near end, and the problem that the hardness of the spring coil body 1 is gradually increased from the far end to the near end due to the fact that the embolization spring coil 100 is extruded more and more seriously due to the fact that the length of the embolization spring coil 100 entering the aneurysm cavity is large can be pertinently improved, the embolic coil 100 is prevented from kicking the delivery catheter out of the aneurysm entrance into the parent artery.
In the embodiment, the wavy lines of the bending sections are set to be equal in height so as to adapt to the size of the spring ring body 1 and reduce the processing difficulty; in other embodiments, the undulations of the curved segments may also be configured to increase in amplitude from the distal end to the proximal end to further increase the elongation margin of the embolic coil 100.
During processing, the anti-unwinding line 2 can be placed in a setting device 200 shown in fig. 8 for heat setting so as to prepare the bending section into a wavy line, wherein the setting temperature is 80-130 ℃, the setting time is 15-120 min, the bending shape of the bending section can be controlled by selecting the corrugated shape of the setting device 200, the distance between adjacent peaks of the anti-bending section can be controlled to gradually decrease from the far end to the near end by selecting the corrugated density of the setting device 200, and the distance between adjacent peaks of the bending section can be controlled to gradually decrease from the far end to the near end by selecting the corrugated height of the setting device 200. The anti-unraveling line 2 shown in fig. 3 is prepared by using a setting device 200 having a wave density gradually increasing from one end to the other end.
Except for the above differences, the embodiment 2 is the same as the embodiment 1, and thus, the description thereof is omitted.
Example 3
Referring to fig. 4, another embodiment of the present invention is shown, and the difference between the embodiment 3 and the embodiment 2 is:
the bending section is set to be a sawtooth line, the height of the sawtooth is 0.05-1 mm, and the distance between adjacent sawteeth of the anti-unwinding line 2 is gradually reduced from the far end to the near end, namely, the sawtooth density of the anti-unwinding line 2 is gradually increased from the far end to the near end, so that the extensibility of the anti-unwinding line 2 is gradually increased from the far end to the near end, and the extension allowance of the spring coil body 1 is gradually increased from the far end to the near end, in the embolization process, when the spring coil body 1 is extruded in an aneurysm cavity in different degrees, the anti-unwinding line 2 can correspondingly provide enough extension allowance from the far end to different positions of the near end, and the problem that the hardness of the spring coil body 1 is gradually increased from the far end to the near end due to the fact that the embolization spring coil 100 is extruded more and more seriously due to the fact that the length of the embolization coil 100 entering the aneurysm cavity is larger and more can be improved pertinently, the embolic coil 100 is prevented from kicking the delivery catheter out of the ostium of the aneurysm cavity into the parent artery.
In the embodiment, the sawtooth lines of the bending sections are set to be equal in height so as to adapt to the size of the spring ring body 1 and reduce the processing difficulty; in other embodiments, the zigzag lines of the curved segments may also be configured such that the zigzag height increases from the distal end to the proximal end to further increase the elongation margin of the embolic coil 100.
During processing, the shape of the saw teeth of the shaping device 200 can be selected to control the bending shape of the bending section, the spacing between adjacent saw teeth of the bending section can be controlled to gradually decrease from the far end to the near end by selecting the density of the saw teeth of the shaping device 200, and the spacing between adjacent saw teeth of the bending section can be controlled to gradually decrease from the far end to the near end by selecting the height of the saw teeth of the shaping device 200.
Except for the above differences, the embodiments 3 and 2 are the same as each other, and are not described herein again.
Example 4
Referring to fig. 5, another embodiment of the present invention is shown, and the difference between the embodiment 4 and the embodiment 1 is:
the anti-unwinding line 2 comprises a bending section and a straight section, the near end of the bending section is fixedly connected to the near end of the spring ring body 1, the far end of the bending section is connected to the near end of the straight section, and the far end of the straight section is fixedly connected to the far end of the anti-unwinding line 2. Like this, not only can reduce the processing degree of difficulty, can satisfy anti 2 distal ends of despiral line and near-end in addition and to its extensible volume's different requirements, prevent that the near-end of embolism spring coil 100 from kicking out the condition emergence that the condition that leads to the vascular embolism in the aneurysm, the tail end of embolism spring coil 100 is perpendicular to the parent artery in the aneurysm that residual embolism spring coil 100 that causes that the transfer duct kicks out the aneurysm entry to the parent artery in and then causes.
In this embodiment, the structure of the bending section is the same as that of embodiment 1, and thus, the description thereof is omitted.
Except for the above differences, the embodiment 4 is the same as the embodiment 1, and thus, the description thereof is omitted.
Example 5
Fig. 6 shows another embodiment of the present invention, and the difference between the embodiment 5 and the embodiment 2 is:
the anti-unwinding line 2 comprises a bending section and a straight section, the near end of the bending section is fixedly connected to the near end of the spring ring body 1, the far end of the bending section is connected to the near end of the straight section, and the far end of the straight section is fixedly connected to the far end of the anti-unwinding line 2. Like this, not only can reduce the processing degree of difficulty, can satisfy anti 2 distal ends of despin line and the different requirements of near-end to its elongation moreover, prevent that the near-end of embolism spring coil 100 from kicking conveying pipe out in aneurysm entry to carrying the aneurysm and then the remaining part embolism spring coil 100 that arouses can't be delivered into in the aneurysm, the tail end of embolism spring coil 100 leads to the condition emergence of vascular embolism in carrying the aneurysm.
In this embodiment, the structure of the bending section is the same as that of embodiment 2, and thus, the description thereof is omitted.
Except for the above differences, the embodiment 4 is the same as the embodiment 2, and thus, the description thereof is omitted.
Example 6
Referring to fig. 7, another embodiment of the present invention is shown, and the difference between the embodiment 6 and the embodiment 3 is:
the anti-unwinding line 2 comprises a bending section and a straight section, the near end of the bending section is fixedly connected to the near end of the spring ring body 1, the far end of the bending section is connected to the near end of the straight section, and the far end of the straight section is fixedly connected to the far end of the anti-unwinding line 2. Like this, not only can reduce the processing degree of difficulty, can satisfy anti 2 distal ends of despin line and the different requirements of near-end to its elongation moreover, prevent that the near-end of embolism spring coil 100 from kicking conveying pipe out in aneurysm entry to carrying the aneurysm and then the remaining part embolism spring coil 100 that arouses can't be delivered into in the aneurysm, the tail end of embolism spring coil 100 leads to the condition emergence of vascular embolism in carrying the aneurysm.
In this embodiment, the structure of the bending section is the same as that of embodiment 3, and thus, the description thereof is omitted.
Except for the above differences, the same as in embodiment 3, and thus, description thereof is omitted.
In conclusion, in the embolic coil 100 provided by the invention, the bending section provides a certain extension margin for the anti-derotation line 2, when the coil body 1 is extruded and extended in the aneurysm cavity in the embolization process, the anti-derotation line 2 can be extended, so that the extension hardening of the coil body 1 is avoided, the line diameter of the near end of the anti-derotation line 2 is reduced, the flexibility of the near end is improved, the hardening of the near end of the coil body 1 in the embolization process, especially in the late embolization stage, is further relieved, and the combined action of the two can prevent the extension hardening of the near end of the coil body 1, so that the situation that the near end of the embolic coil 100 automatically kicks out the aneurysm cavity of the delivery catheter to the parent artery coil is prevented, and the situation that the near end of the embolic coil 100 cannot be delivered into the aneurysm cavity and the tail end of the embolic coil 100 hangs down in the parent artery to cause vascular embolization, greatly shortens the operation time, reduces the operation risk and relieves the pain of patients; furthermore, the curve section is matched with the straight section, the wire diameter of the anti-unwinding line 2 gradually decreases from the far end to the near end, the wire length of the unit length of the near end of the anti-unwinding line 2 in the far and near directions of the anti-unwinding line 2 is larger than that of the unit length of the far end, and the wire length of the unit length of the anti-unwinding line 2 gradually increases from the far end to the near end, so that the flexibility or the elongation of the anti-unwinding line 2 from the far end to the near end is better and better or the elongation is increased, different requirements of the far end and the near end of the anti-unwinding line 2 on the elongation are met, and the situation that the residual part of the embolic coil spring ring 100 cannot be delivered into the aneurysm due to the fact that the delivery catheter is kicked out of the aneurysm inlet to the near end of the embolic coil 100 is perpendicular to the parent artery to cause vascular embolism is prevented.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. The embolic coil is characterized by comprising a coil body and an anti-untwisting line arranged in the coil body, wherein the wire diameter of the near end of the anti-untwisting line is smaller than that of the far end;
the anti-unwinding line comprises a bent section, the near end of the bent section is fixedly connected to the near end of the spring ring body, and the far end of the bent section is fixedly connected to the far end of the spring ring body;
or, the anti-unwinding line comprises a bending section and a straight section, the near end of the bending section is fixedly connected to the near end of the spring ring body, the far end of the bending section is connected to the near end of the straight section, and the far end of the straight section is fixedly connected to the far end of the anti-unwinding line.
2. The embolic coil of claim 1, wherein said anti-unwinding wire has a wire diameter that tapers from a distal end to a proximal end.
3. The embolic coil of claim 1, wherein said anti-unwinding wire has a proximal unit length greater than a distal unit length in a distal-proximal direction of said anti-unwinding wire.
4. The embolic coil of claim 3, wherein the length of the anti-unwinding wire per unit length increases gradually from the distal end to the proximal end in the distal-proximal direction of the anti-unwinding wire.
5. The embolic coil of any of claims 1 to 4, wherein said curved section is a variable pitch helix, said curved section having a pitch that tapers from a distal end to a proximal end.
6. The embolic coil of any of claims 1 to 4, wherein said curved segments are contoured and have adjacent peaks that taper from the distal end to the proximal end.
7. The embolic coil of any of claims 1 to 4, wherein said anti-unwinding line is a contour of constant pitch serrations, said anti-unwinding line having adjacent serrations that taper in pitch from a distal end to a proximal end.
8. The embolic coil of claim 1, wherein said anti-unwinding wire has a length that is 105-150% of its linear length in the distal-proximal direction.
9. The embolic coil of claim 1, wherein said anti-unwinding wire has a wire diameter of 0.02-0.1 mm.
10. The embolic coil of claim 9, wherein said anti-unwinding wire has a wire diameter of 0.03-0.06 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548271.2A CN114668440A (en) | 2020-12-24 | 2020-12-24 | Embolism spring ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011548271.2A CN114668440A (en) | 2020-12-24 | 2020-12-24 | Embolism spring ring |
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| Publication Number | Publication Date |
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| CN114668440A true CN114668440A (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011548271.2A Pending CN114668440A (en) | 2020-12-24 | 2020-12-24 | Embolism spring ring |
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| CN (1) | CN114668440A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810314A (en) * | 2005-01-26 | 2006-08-02 | 朝日印帝克股份有限公司 | A medical guide wire |
| CN1883402A (en) * | 2006-06-28 | 2006-12-27 | 金磊 | Occluder delivery system for cardiac surgery department |
| CN201802792U (en) * | 2010-08-26 | 2011-04-20 | 芜湖天佑汽车技术有限公司 | Variable-stiffness coil spring for automotive suspension |
| JP2017086267A (en) * | 2015-11-05 | 2017-05-25 | 国立大学法人信州大学 | Embolization coil |
| CN107028636A (en) * | 2017-03-30 | 2017-08-11 | 向建平 | The turn and its manufacture method of intracranial aneurysm embolization |
| CN110840508A (en) * | 2019-12-17 | 2020-02-28 | 上海加奇生物科技苏州有限公司 | Implant for treating arteriovenous pulmonary fistula |
| CN211300154U (en) * | 2019-06-28 | 2020-08-21 | 微创神通医疗科技（上海）有限公司 | Spring ring and anti-unscrewing part thereof |
-
2020
- 2020-12-24 CN CN202011548271.2A patent/CN114668440A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1810314A (en) * | 2005-01-26 | 2006-08-02 | 朝日印帝克股份有限公司 | A medical guide wire |
| CN1883402A (en) * | 2006-06-28 | 2006-12-27 | 金磊 | Occluder delivery system for cardiac surgery department |
| CN201802792U (en) * | 2010-08-26 | 2011-04-20 | 芜湖天佑汽车技术有限公司 | Variable-stiffness coil spring for automotive suspension |
| JP2017086267A (en) * | 2015-11-05 | 2017-05-25 | 国立大学法人信州大学 | Embolization coil |
| CN107028636A (en) * | 2017-03-30 | 2017-08-11 | 向建平 | The turn and its manufacture method of intracranial aneurysm embolization |
| CN211300154U (en) * | 2019-06-28 | 2020-08-21 | 微创神通医疗科技（上海）有限公司 | Spring ring and anti-unscrewing part thereof |
| CN110840508A (en) * | 2019-12-17 | 2020-02-28 | 上海加奇生物科技苏州有限公司 | Implant for treating arteriovenous pulmonary fistula |
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