CN111528956B - Releasable spring ring - Google Patents
Releasable spring ring Download PDFInfo
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- CN111528956B CN111528956B CN202010380731.9A CN202010380731A CN111528956B CN 111528956 B CN111528956 B CN 111528956B CN 202010380731 A CN202010380731 A CN 202010380731A CN 111528956 B CN111528956 B CN 111528956B
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- spring
- spring ring
- clamp
- spring coil
- ring
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- 239000007769 metal material Substances 0.000 claims description 8
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- 239000010963 304 stainless steel Substances 0.000 claims description 6
- 229910000566 Platinum-iridium alloy Inorganic materials 0.000 claims description 6
- 229920002614 Polyether block amide Polymers 0.000 claims description 6
- 229910001260 Pt alloy Inorganic materials 0.000 claims description 6
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 6
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- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical class [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 claims description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
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Images
Classifications
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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
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
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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
- A61B2017/00831—Material properties
- A61B2017/00902—Material properties transparent or translucent
- A61B2017/00915—Material properties transparent or translucent for radioactive radiation
- A61B2017/0092—Material properties transparent or translucent for radioactive radiation for X-rays
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
-
- 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 provides a releasable spring ring, which comprises an introducing sheath, a pushing system and a spring ring assembly, wherein the pushing system is positioned in the introducing sheath and comprises a clamp, the shape and the number of the clamp are optimized, and a protruding part is arranged at the near end of the spring ring, so that the spring ring is fixed and matched more tightly and firmly through the clamp at ordinary times, the releasable spring ring can be stably conveyed into a position needing thrombus occlusion in a human body, then the spring ring is easily released, instant release can be realized during release, the operation mode is simple and convenient, injury to blood vessels is avoided, the mechanical release system has strong controllability and good developing performance on the embolic spring ring before release, and instant release can be realized, compared with a lock catch type release mode, the releasable spring ring can be pushed more easily, the injury to the spring ring is avoided, when the spring ring is pushed out of a guide tube, the push rod can not be damaged when being withdrawn.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a releasable spring coil.
Background
The spring ring is a medical apparatus for treating aneurysm, and when in treatment, the spring ring is sent into the aneurysm, and after reaching a focus position, the spring ring is used for filling the aneurysm, so that the aneurysm is filled, blood flow is prevented from entering the aneurysm, and the purpose of treating aneurysm rupture is achieved.
In interventional procedures for spring coil embolization of aneurysms, coils of different sizes, three-dimensional or two-dimensional shapes need to be delivered from large to small into the tumor until the spring within the tumor can densely pack the entire aneurysm. Clinically, interventional procedures for every aneurysm typically require several to ten-odd coils to achieve dense packing of the aneurysm. On the basis of establishing the channel by using the catheter, the filling of each spring ring needs to be carried out through the steps of conveying, placing, releasing and withdrawing the push rod.
Currently, there are three main modes of embolic coil release: hydrolytic, electrolytic and mechanical release. The hydrolytic release spring ring has poor controllability and less clinical application; the most used electrolytic release spring rings in clinic mostly have the problems of too long release time or unstable release time, and the operation time is influenced; the simple buckle type design in the mechanical releasing spring ring can realize the instant releasing of the spring ring, but the controllability of the spring ring in the filling process is reduced, and particularly, the spring ring is difficult to pull back or push after being pushed out of the channel. Thus, there is a need for an embolic coil release that provides strong controllability of the embolic coil prior to release and that allows for instantaneous release.
Disclosure of Invention
The embodiment of the invention provides a releasable spring ring, which is characterized in that a guide-in sheath, a spring ring and a pushing system are arranged, the pushing system is positioned in the guide-in sheath and comprises a clamp and a pushing rod, the shape and the number of the clamp are optimized, the shape of the near end of the spring ring is improved, the spring ring is fixedly matched with a microcatheter more tightly and firmly through the clamp at ordinary times, the friction area between the spring ring and the microcatheter is reduced in the conveying process, the spring ring can be ensured to keep the original shape in the conveying process, the waste caused by deformation of the spring ring is reduced, the spring ring can be stably conveyed into a position needing thrombus occlusion in a human body, then the spring ring is easily released, the spring ring can be instantly released in the releasing process, the operation.
In view of the above problems, the technical solution proposed by the present invention is:
a releasable spring coil comprising:
introducing a sheath;
a spring coil assembly comprising a spring coil and a protrusion;
wherein the spring coil assembly is disposed inside the introducer sheath, the protrusion being disposed on a proximal side of the spring coil;
the pushing system comprises a clamp and is used for fixing and moving the position of the spring ring assembly;
the pushing system is arranged inside the guiding sheath, and the protruding part is detachably connected with the clamp;
the anchor clamps with the face that the spring coil subassembly contacted is seted up flutedly, the inside screw thread that is provided with of recess, the shape of this screw thread with the surface looks adaptation of spring coil, the pitch of this screw thread with the pitch of spring coil is 1: 1 or n:1, n >1, and n is an integer.
In order to better realize the technical scheme of the invention, the following technical measures are also adopted.
Further, the guiding sheath is a catheter with an internal hollow structure, the guiding sheath is made of any one of polyether block amide Pebax, Nylon and polytetrafluoroethylene PTFE, the length of the guiding sheath is 800mm-1700mm, the thickness of the inner wall of the pipe body is 0.05mm-3mm, and the outer diameter of the pipe body is 0.1mm-3 mm.
Further, the spring coil has a two-stage configuration, the spring coil assumes a linearly compressed primary configuration when the spring coil is fed out of the introducer sheath and into the body, the spring coil recovers to assume a secondary configuration, i.e., a final configuration of the spring coil, the diameter of the secondary configuration of the spring coil is greater than the diameter of the primary configuration of the spring coil, the diameter of the primary configuration ranges from 0.25mm to 0.35mm, the wire diameter ranges from 0.02mm to 0.1mm, and the spring coil is made of any one of nickel-titanium alloy, platinum-iridium alloy, platinum-tungsten alloy, tungsten, iridium and titanium alloy.
Further, the material of the protruding portion is any one of 304 stainless steel and nickel titanium alloy, and the shape of the protruding portion is any one of spherical and columnar.
Furthermore, the clamp material is metal or polymer material, and is any one of 304 stainless steel, 316 stainless steel, platinum iridium alloy, platinum tungsten alloy, high density polyethylene HDPE, polytetrafluoroethylene PTFE and optical fiber LCP, the number of the clamps is 2-8, and the clamps are uniformly distributed in the guiding sheath by taking the axis of the guiding sheath as an array center.
Further, one end of the clamp, which is in contact with the spring ring assembly, is provided with a marking block for marking the position of the clamp under the ray, the material of the marking block is any one of platinum alloy, tungsten alloy or metal materials of Pt, W and Au, the marking block is connected with the clamp through riveting or welding, and the ratio of the marking block to the material of the clamp is 1: 1 or 1: 2.
Further, the shape of the clamp is columnar, spherical, cylindrical and other shapes or a combination thereof.
Further, contain the push rod in the push system, the push rod set up in the anchor clamps, the push rod is the integrative or many-body cylinder or the bar-shaped structure of cuboid that adopt metal or macromolecular material to make for push out anchor clamps with the spring coil, make the spring coil get into human body, the distal end of push rod is provided with the mark ring, the mark ring is located inside the push rod distal end, the material of mark ring is any one of platinum alloy, tungsten alloy or Pt, W, Au metal material, the mark ring is arranged in showing in the ray environment the position of push rod.
Compared with the prior art, the invention has the beneficial effects that: the pushing system is positioned in the guiding sheath and comprises a clamp, the shape and the number of the clamp are optimized, a protrusion part is arranged at the proximal end of the spring ring, can adapt to various spring rings with different specifications to fix and match the spring rings more tightly and firmly through a clamp at ordinary times, can stably convey the spring ring into the position needing thrombus occlusion in the human body, push the clamp out of the catheter to easily release the spring ring, realize instant release when releasing, have simple and convenient operation mode, avoid damaging blood vessels, the mechanical releasing system has strong controllability and good developing property for the embolic coil before releasing, can realize instantaneous releasing, compared with a lock catch type releasing mode, the disengageable spring ring can enable the spring ring to be pushed more easily, damage to the spring ring is avoided, when the spring ring is pushed out of the catheter, the clamp cannot damage the catheter when being withdrawn.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
FIG. 1 is a schematic illustration of a releasable spring coil according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an embodiment of the present invention showing four releasable spring coils;
FIG. 3 is a schematic structural view of the releasable spring ring of the present invention with two clamps;
FIG. 4 is a schematic structural view of six releasable spring ring clamps according to an embodiment of the present invention;
FIG. 5 is a schematic view of a push rod with a releasable spring ring according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a releasable spring ring clamp according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of embodiment 1 disclosed in the present invention;
FIG. 8 is a schematic structural diagram of embodiment 2 disclosed in the present invention;
FIG. 9 is a schematic structural diagram of embodiment 3 according to the disclosure of the present invention;
FIG. 10 is a schematic structural diagram of embodiment 4 of the present disclosure;
FIG. 11 is a schematic structural diagram of embodiment 5 disclosed in the present application;
FIG. 12 is a schematic structural diagram of embodiment 6 of the disclosure according to the present invention;
FIG. 13 is a schematic structural diagram of embodiment 7 of the present invention;
fig. 14 is a schematic structural diagram of embodiment 8 disclosed in the embodiments of the present invention.
Reference numerals:
1-introducing sheath; 2-a push system; 201-a clamp; 20101-groove; 202-a push rod; 203-marker loop; 3-a spring coil assembly; 301-spring coils; 302-projection.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
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.
Referring to fig. 1-14, the interior of the introducing sheath 1 is hollow, the introducing sheath 1 is a tube body with a length of 800mm-1700mm, the thickness of the inner wall of the tube body is 0.05mm-3mm, the outer diameter of the tube body is 0.1mm-3mm, the material of the introducing sheath 1 is any one of polyether block amide Pebax, Nylon and polytetrafluoroethylene PTFE, and has good mechanical strength and wear resistance, wherein the distal end of the introducing sheath 1 is communicated with a catheter for establishing a channel, the pushing system 2 enters the interior of the introducing sheath 1 from the proximal end of the introducing sheath 1, the pushing system 2 comprises a clamp 201, the clamp 201 is used for fixing the spring coil 301 in a normal state, and in operation, the spring coil 301 is pushed by the clamp 201 to enter the channel of the catheter from the introducing sheath 1 and finally reach a lesion site of a human body from the channel, the spring coil assembly 3 comprises a spring coil 301 and a protruding part 302, the spring ring assembly 3 is arranged inside the introducing sheath 1, the protruding part 302 is arranged at the proximal end side of the spring ring 301, the protruding part 302 is detachably connected with the clamp 201, the number and the shape of the clamp 201 can be selected according to the shape of the protruding part 302, the shape and the number of the clamp 201 are optimized, the shape of the proximal end of the spring ring 301 is improved, the releasable spring ring 301 can stably fix the spring ring 301, so that the spring ring 301 can be accurately conveyed to a position needing thrombus occlusion in a human body, the spring ring 301 is in a compressed primary form when being introduced into the sheath 1 or the catheter, the spring ring is restored to the original state of the spring ring 301 due to the self elasticity when being outside the catheter, and after the clamp 201 pushes the spring ring 301 out of the catheter, the spring ring 301 and the clamp 201 are not limited by the introducing sheath 1 and the inner wall of the catheter, the clamp 201 is separated from the spring ring 301, so that instantaneous release can be realized during release, the operation mode is simple and convenient, and the damage to blood vessels is avoided.
The embodiment of the invention is also realized by the following technical scheme.
Referring to fig. 1, in the present embodiment, the spring coil 301 has a two-stage configuration, the spring coil 301 assumes a linearly compressed primary configuration when being introduced into the introducer sheath 1, the spring coil 301 returns to its original secondary configuration, i.e., the final configuration of the spring coil 301, the diameter of the secondary configuration of the spring coil 301 is larger than that of the primary configuration of the spring coil 301, the diameter of the primary configuration ranges from 0.25mm to 0.35mm, the diameter of the spring wire ranges from 0.02mm to 0.1mm, the material of the spring coil 301 is any one of nickel-titanium alloy, platinum-iridium alloy, platinum-tungsten alloy, tungsten, iridium, and titanium alloy, the spring coil 301 has a shape with a large proximal end and a small distal end in the primary configuration in order to facilitate the distal end portion thereof to pass through the clamp 201 and the proximal protrusion 302 to be clamped and fixed by the clamp 201, meanwhile, the spring ring 301 can be withdrawn and released again when not completely released, the far-end surface of the spring ring 301 can be provided with polyester fibers to increase the thrombus-inducing function of the spring, and the primary form and the secondary form of the spring ring 301 are prefabricated. When the coil 301 is inside the introducer sheath 1, constrained by the wall of the tube and the clamp 201, it assumes a primary form that is maintained when the coil 301 is pushed out of the introducer sheath 1 and into the catheter, but when the coil 301 exits the catheter and into the aneurysm, the coil 301 returns to a pre-set secondary form due to the disengagement of the wall constraint and the elasticity of the material itself, typical secondary forms of the coil 301 being cylindrical, conical, cubic, spherical, etc.
Referring to fig. 1-4 and 6-14, in the embodiment of the present invention, the material of the clamp 201 is a metal or a polymer material, and is any one of 304 stainless steel, 316 stainless steel, platinum iridium alloy, platinum tungsten alloy, high density polyethylene HDPE, polytetrafluoroethylene PTFE and optical fiber LCP, the number of the clamps 201 is 2-8, the axial center of the leading-in sheath 1 is taken as the array center and is uniformly distributed in the leading-in sheath 1, different shapes and numbers of clamps 201 may be selected for different gauges of spring coils 301, by increasing the number of clamps 201, which preferably includes 4 clamps 201 for the coils 301 in the primary configuration, the coils 301 can be further firmly clamped, avoiding damage caused by movement or rotation of the coils 301 in the introducer sheath 1, for better performance and optimal cost.
Referring to fig. 1 and 6-14, in an embodiment of the present invention, an end of the clamp 201, which is in contact with the spring coil assembly 3, is provided with a marking block for marking a position of the clamp 201 under a ray to facilitate an operation of a surgeon in an operation, the marking block is made of any one of platinum alloy, tungsten alloy or Pt, W, Au metal materials, and is connected with the clamp 201 by riveting or welding, and a ratio of the marking block to the clamp 201 is 1: 1 or 1: 2.
Referring to fig. 1 and 6-14, in the embodiment of the present invention, a groove 20101 is formed on a surface of the clamp 201, which is in contact with the spring ring assembly 3, a thread is arranged inside the groove 20101, the shape of the thread is matched with the outer surface of the spring ring 301, and the pitch of the thread and the pitch of the spring ring 301 are 1: 1 or n:1, n is greater than 1, and n is an integer, the spring ring 301 can be clamped into the threads, so that the spring ring 301 is prevented from loosening, stress concentration of the spring ring 301 and the protruding part of the spring ring 301 is reduced, the matching of the clamp 201 and the spring ring 301 is further ensured, and the spring ring 301 can be effectively protected from deformation when being clamped.
Referring to fig. 1 and 6-14, in the embodiment of the present invention, the clamp 201 is in the shape of a cylinder, a sphere, a cylinder, or other shapes or combinations thereof, for better matching with the proximal protrusion 302 of the spring coil 301 with different shapes, so as to facilitate clamping, pushing and releasing the spring coil 301, the material of the protrusion 302 is any one of 304 stainless steel and nickel-titanium alloy, which has good mechanical strength and anti-rust effect, the shape of the protrusion 302 is any one of a sphere and a cylinder, and furthermore, the contact position between the clamp 201 and the proximal end of the spring coil 301 can be grooved according to the protrusion 302 of the spring coil 301 to obtain better matching.
Example 1, referring to fig. 7, the shape of the protruding portion 302 provided at the proximal end of the spring coil 301 is spherical, and the shape of the clamp 201 is a combination of rectangular parallelepiped and cubic, and the clamp 201 can selectively clamp and fix the protruding portion 302 provided at the proximal end of the spring coil 301.
In embodiment 2, referring to fig. 8, the spring ring 301 with the spherical protruding portion 302 can also adopt a semicircular clamp 201 to abut against or clamp one end of the protruding portion 302, so as to reduce damage to the spring ring 301.
In example 3, referring to fig. 9, the protrusion 302 provided at the proximal end of the spring coil 301 is shaped like a ball, and the clamp 201 is shaped like a rectangular parallelepiped, and the clamp 201 can selectively clamp the proximal end of the spring coil 301 to fix it.
Example 4, referring to fig. 10, the protrusion 302 of the spring coil 301 is spherical, the clamp 201 is a combination of rectangular parallelepiped and cubic, and the clamp 201 can selectively clamp the proximal end of the spring coil 301 to secure it against the end of the protrusion 302 of the spring coil 301 so that it cannot move distally without the pushing rod 202.
In example 5, referring to fig. 11, if the protrusion 302 of the spring coil 301 is a rectangular parallelepiped, a rectangular parallelepiped jig 201 may be selected for fixing.
Referring to fig. 1, 5 and 12-14, in an embodiment of the present invention, the pushing system includes a pushing rod 202, the pushing rod 202 is disposed in the clamp 201, the pushing rod 202 is an integral or multi-body cylindrical or rectangular rod-shaped structure made of metal or polymer material, and is used for pushing the spring coil 301 out of the clamp 201, so that the spring coil 301 enters the human body, the pushing rod 202 needs to abut against the proximal protrusion 302 of the spring coil 301 and push the spring coil to the distal end of the guide tube, the distal end of the pushing rod is provided with a marking ring, the marking ring 203 is located inside the distal end of the pushing rod 202, in order to increase the developability of the pushing rod 202, the marking ring 203 is made of any one of platinum alloy, tungsten alloy or metal materials of Pt, W, and Au, and the addition of the developability material can better control the pushing rod 202, and reduce the surgical risk, the distal end of the push rod 202 can be normally separated from the proximal end of the spring coil 301. when the spring coil 301 needs to be pushed, the distal end of the push rod 202 contacts the proximal end of the spring coil, so that the spring coil 301 moves towards the distal end of the guide tube. The following occurs during release of the different coil 301 and clamp 201 combinations as they exit the catheter into the body.
Example 6, referring to fig. 12, the pushing system 2 can be combined with a proximal solid or hollow catheter and a distal 2 clamps 201, the catheter is used for fixing the clamps 201, the pushing system 2 does not include the pushing rod 202, the spring coil 301 is fixed by the clamps 201 in advance, the pushing system 2 and the spring coil 301 are inserted into the introducing sheath 1, when the pushing system 2 and the spring coil 301 enter the catheter from the introducing sheath 1, preferably leave the catheter and enter the human body, the clamps 201 are firstly expanded due to no constraint of the catheter wall, then the spring coil 301 is released by the clamps 201 to enter the human body, if the clamps 201 are made of nickel-titanium alloy, the clamps 201 can be deformed to the preset position when the body temperature reaches about 37 ℃ due to the characteristic of nickel-titanium alloy, and the clamps 201 can be automatically expanded to the preset position when the clamps 201 leave the catheter and enter the human body.
Example 7, referring to fig. 13, the pushing system 2 comprises a hollow catheter for fixing the clamp 201, the pushing rod 202 and 2 clamps 201, when the pushing system 2 and the spring coil 301 enter the catheter from the guiding sheath 1, preferably leave the catheter and enter the human body, the clamp 201 will be opened first because there is no constraint of the catheter wall, because the system comprises the pushing rod 202, if the post-opening angle of the clamp 201 entering the human body is not large enough to make the spring coil 301 enter the human body, at this time, the pushing rod 202 can be used to push the spring coil 301 to enter the human body, compared with the pushing system 2 without the pushing rod 202 1, the pushing system 2 can push the catheter out more smoothly, and there is no situation that the catheter cannot be pushed out.
Embodiment 8, referring to fig. 14, the pushing system 2 comprises a hollow catheter for fixing the clamp 201, the pushing rod 202 and 2 clamps 201, in the normal state, because the clamp 201 is supported by the wall of the guiding sheath 1 and cannot be opened, and in the closed state, the pushing rod 202 will touch the clamp 201 before touching the spring coil 301 and will be blocked by the clamp 201 and cannot advance, so the spring coil 301 cannot be pushed out, only when the clamp 201 and the spring leave the catheter and enter the human body, because there is no constraint of the catheter, the preset clamp 201 can be opened, the pushing rod 202 can smoothly send the spring coil 301 into the human body, this design can avoid pushing the spring coil 301 out of the clamp 201 when the spring coil reaches the lesion site during pushing, and can also reduce the damage to the spring coil 301 during pushing.
The method comprises the following specific implementation steps: the pushing system 2 and the spring coil assembly 3 are positioned in the guide-in sheath 1, the pushing system 2 comprises a clamp 201, the spring coil assembly 3 comprises a spring coil 301 and a protruding portion 302, the far-end surface of the spring coil 301 is provided with polyester fibers which can increase the thrombus causing function of the spring, a groove 20101 is formed in the contact position of the clamp 201 and the protruding portion 302, threads are arranged in the groove, the contact area of the spring coil 301 and the clamp 201 is increased, the clamp 201 is convenient to clamp the spring coil assembly 3, the clamp 201 abuts against one end of the spring coil assembly 3 to prevent the end from sliding towards the far end in the normal state, when the pushing system is used, the spring coil 301 is clamped and fixed by the clamp 201 and moves to a diseased part of a human body through the guide-in sheath 1 and a catheter channel, the spring coil 301 is limited by a tube wall in the guide-in sheath 1 and the catheter channel to be in a linear compressed primary form, when the spring coil 301 leaves, the clamp 201 can be expanded to a preset position, the spring ring 301 can be released, the spring ring 301 is restored to be in a secondary form, if the spring ring 301 cannot be completely released due to the expansion angle of the clamp 201, the push rod 202 can be used for contacting the near end of the spring ring 301 to push the spring ring 301 out of the clamp 201, and the spring ring 301 is pushed out of the catheter to enter a human body, so that the releasable spring ring 301 has the advantages that the spring ring 301 can be guaranteed to keep the original shape in the conveying process, waste caused by deformation of the spring ring 301 is reduced, the spring ring 301 can be stably conveyed into the position of the human body needing thrombus occlusion, then the spring ring 301 is easily released, instant release can be realized during release, the operation mode is simple and convenient, and the effect of damaging blood vessels is avoided.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A releasable spring coil, comprising:
introducing a sheath;
a spring coil assembly comprising a spring coil and a protrusion;
wherein the spring coil assembly is disposed inside the introducer sheath, the protrusion being disposed on a proximal side of the spring coil;
the pushing system comprises a clamp and is used for fixing and moving the position of the spring ring assembly;
the pushing system is arranged inside the guiding sheath, and the protruding part is detachably connected with the clamp;
the anchor clamps with the face that the spring coil subassembly contacted is seted up flutedly, the inside screw thread that is provided with of recess, the shape of this screw thread with the surface looks adaptation of spring coil, the pitch of this screw thread with the pitch of spring coil is 1: 1 or n:1, n >1, and n is an integer.
2. The releasable spring coil of claim 1, wherein: the guiding sheath is a catheter with an internal hollow structure, the guiding sheath is made of any one of polyether block amide Pebax, Nylon and polytetrafluoroethylene PTFE, the length of the guiding sheath is 800mm-1700mm, the thickness of the inner wall of the pipe body is 0.05mm-3mm, and the outer diameter of the pipe body is 0.1mm-3 mm.
3. The releasable spring coil of claim 1, wherein: the spring ring has a two-stage form, when the spring ring is introduced into the sheath, the spring ring is in a linear compressed primary form, when the spring ring is sent out of the introduction sheath and enters a human body, the spring ring is restored to a secondary form, namely the final form of the spring ring, the diameter of the secondary form of the spring ring is larger than that of the primary form of the spring ring, the diameter of the primary form ranges from 0.25mm to 0.35mm, the diameter of the spring wire ranges from 0.02mm to 0.1mm, and the spring ring is made of any one of nickel-titanium alloy, platinum-iridium alloy, platinum-tungsten alloy, tungsten, iridium and titanium alloy.
4. The releasable spring coil of claim 1, wherein: the material of the protruding part is any one of 304 stainless steel and nickel titanium alloy, and the shape of the protruding part is any one of spherical shape and columnar shape.
5. The releasable spring coil of claim 1, wherein: the clamp is made of metal or high polymer materials, and is made of any one of 304 stainless steel, 316 stainless steel, platinum iridium alloy, platinum tungsten alloy, high-density polyethylene (HDPE), Polytetrafluoroethylene (PTFE) and optical fiber LCP, the number of the clamps is 2-8, and the clamps are uniformly distributed in the guide-in sheath by taking the axis of the guide-in sheath as an array center.
6. The releasable spring coil of claim 1, wherein: the spring ring assembly is characterized in that one end of the clamp, which is in contact with the spring ring assembly, is provided with a marking block for marking the position of the clamp under the ray, the marking block is made of any one of platinum alloy, tungsten alloy or Pt, W and Au metal materials, the marking block is connected with the clamp through riveting or welding, and the ratio of the marking block to the clamp materials is 1: 1 or 1: 2.
7. The releasable spring coil of claim 1, wherein: the shape of the clamp is columnar, spherical, cylindrical and other shapes or a combination thereof.
8. The releasable spring coil of claim 1, wherein: contain the push rod among the push system, the push rod set up in the anchor clamps, the push rod is the integrative or many-body cylinder or the bar-shaped structure of cuboid that adopt metal or macromolecular material to make for release anchor clamps with the spring coil, make the spring coil get into human body, the distal end of push rod is provided with the mark ring, the mark ring is located inside the push rod distal end, the material of mark ring is any kind among platinum alloy, tungsten alloy or Pt, W, the Au metal material, the mark ring is arranged in showing in the ray environment the position of push rod.
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| CN112626605B (en) * | 2020-12-07 | 2022-01-14 | 北京泰杰伟业科技有限公司 | Clamp capable of continuously processing electrochemical polishing anode electrode |
| CN113768555B (en) * | 2021-09-16 | 2023-01-31 | 孟自力 | Spring ring for bronchus pleura fistula |
| CN116525121B (en) * | 2023-07-05 | 2023-09-26 | 昆明同心医联科技有限公司 | Method for establishing primary spring coil recommendation model of embolic aneurysm and application of primary spring coil recommendation model |
| CN116831679B (en) * | 2023-09-02 | 2023-11-14 | 杭州亿科医疗科技有限公司 | Aneurysm vortex device easy to release |
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| CN110974333A (en) * | 2020-01-07 | 2020-04-10 | 北京美中双和医疗器械股份有限公司 | Releasable embolic coil system |
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| DK175166B1 (en) * | 1995-01-03 | 2004-06-21 | Cook William Europ | Method of manufacturing an assembly for placing an embolization coil in the vascular system and such assembly as well as an apparatus for advancing the assembly |
| WO2010123821A1 (en) * | 2009-04-20 | 2010-10-28 | Achieva Medical Limited | Delivery assembly for occlusion device using mechanical interlocking coupling mechanism |
| US9579104B2 (en) * | 2011-11-30 | 2017-02-28 | Covidien Lp | Positioning and detaching implants |
| WO2014145012A2 (en) * | 2013-03-15 | 2014-09-18 | Covidien Lp | Delivery and detachment mechanisms for vascular implants |
| US20150216688A1 (en) * | 2014-02-04 | 2015-08-06 | The Texas A&M University System | Intravascular Medical Device Release System |
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| CN110974333A (en) * | 2020-01-07 | 2020-04-10 | 北京美中双和医疗器械股份有限公司 | Releasable embolic coil system |
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