CN215384338U

CN215384338U - Mechanical release's vascular embolism spring coil system

Info

Publication number: CN215384338U
Application number: CN202121792119.9U
Authority: CN
Inventors: 赵中
Original assignee: Zhuhai Tongqiao Medical Technology Co ltd
Current assignee: Zhuhai Tongqiao Medical Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-01-04
Anticipated expiration: 2031-08-02

Abstract

The utility model provides a mechanical releasing vascular embolic coil system, which comprises a push rod with an inner cavity, a releasing wire and a releasing ball which are arranged in the inner cavity, and an embolic coil connected with the releasing ball, wherein the side wall of the inner cavity, close to the far end, of the push rod is provided with a limiting notch, the releasing ball is matched with the limiting notch under the action of the releasing wire to be limited in the inner cavity of the push rod, thus, the releasing ball is matched with the limit notch under the action of the releasing wire to be limited in the inner cavity of the pushing rod to realize the limitation of the embolic coil, therefore, a structure that a limit step or an end cover and the like limit the releasing ball is not needed to be arranged at the far end port of the push rod, the problem that the releasing ball cannot be released because the releasing ball is blocked by the limit step or the end cover when being released from the far end port is avoided, when the release ball is drawn out of the release wire, the release ball can be conveniently, quickly and accurately separated from the push rod.

Description

Mechanical release's vascular embolism spring coil system

Technical Field

The utility model relates to a vascular embolic coil system, in particular to a mechanical-release vascular embolic coil system.

Background

At present, the release modes of the spring ring comprise four main modes of hydrolysis release, electrolysis release, thermal fusion release and mechanical release. The spring ring is released by introducing a solvent into the conveying pipe for dissolution, so that 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 electric release is that the spring ring and the guide wire are welded together by electric welding. After electric welding is cooled, the welding part is uneven, relatively high voltage is easily generated, the time for electrically disconnecting the spring ring from the micro-catheter is not easy to control, the time for electrically disconnecting the spring ring is long, and the time is different from 30 seconds to several minutes; the thermal fuse release needs to introduce current, wires, electrodes and the like, and the spring ring release is realized by electrically generating a thermal fuse for thermal fuse. The smoking phenomenon can be generated during hot melting, so that local damage in a human body is easily caused, and the pain of a patient is increased; mechanical releasing adopts mechanical structure to link together propelling movement pole and spring coil, releases the spring coil to the aneurysm in through removing the release part, and mechanical releasing does not need extra input solvent or electric energy, and easy operation is convenient, and the response is rapid, and connects reliably, has become the commonly used mode of releasing of spring coil product in the market.

An intravascular implant delivery system is known. The system carries the implant by holding an engagement member that engages the implant in a position proximate to an aperture at the distal end of the delivery system. The engagement member is held proximate to the aperture by a cord that blocks movement of the engagement member through the aperture. The engagement member is free to rotate and move within the area defined by the delivery system, thereby allowing the implant to resist forces applied to the implant by the delivery system and movement of the implant through the delivery catheter. Once the implant is in the desired implantation position, the cord is removed from the aperture and the engagement member is allowed to move away from the delivery system. Analysis has found that this design suffers from a number of deficiencies. One disadvantage of this design is that it requires the use of an actuator to perform the detachment operation, which is done by first inserting the outer tube at the proximal end of the delivery system into a predetermined position in the interface of the actuator, and then confirming that the detachment operation is possible without error, which can make the detachment operation more complicated and increase the operation time; the other disadvantage of the design is that the end cover is welded at the far end of the conveying system, a step exists between the combining component and the end cover hole, the size of the combining component is close to that of the end cover hole, the combining component can be blocked by the end cover after the releasing operation, the combining component cannot be separated from the conveying system, and the releasing failure occurs with a certain probability.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a mechanically releasable vasoocclusive coil system that facilitates release.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a vascular embolism spring coil system that machinery was liberated, wherein, including the push rod that has the inner chamber, locate the liberation silk and the liberation ball of inner chamber and with the embolism spring coil that the liberation ball is connected, the push rod is close to and is equipped with spacing breach on the inner chamber lateral wall of distal end, the liberation ball in the effect of liberation silk with spacing breach cooperation in order to be restricted in the inner chamber of push rod.

Further, the vasoocclusive coil system is in a limiting state, and the release ball is at least partially clamped in the limiting notch.

Further, the vascular embolic coil system is in a release state, and the release ball is separated from the limit notch and separated from the push rod from the far end so as to release the embolic coil.

Further, the width of the limiting notch is not smaller than the diameter of the releasing ball.

Furthermore, the limiting notch is circular, oval or U-shaped.

Furthermore, the diameter of the release ball is D1, the diameter of the connecting wire is D2, and D1 is 2D 2.

Further, the wire diameter of the connecting wire is equal to that of the release wire.

Furthermore, the interference magnitude of the matching of the release wire and the release ball with the inner diameter of the push rod is smaller than the wall thickness of the push rod.

Furthermore, a near-end connecting piece is arranged at the near end of the pushing rod, and the near-end connecting piece is fixed with the release wire and welded with the pushing rod.

Furthermore, an indication pipe is arranged at the welding joint of the near-end connecting piece and the push rod.

After the technical scheme is adopted, the utility model has the following advantages:

1. in the utility model, the side wall of the inner cavity of the pushing rod close to the far end is provided with the limiting notch, so that the releasing ball is matched with the limiting notch under the action of the releasing wire to be limited in the inner cavity of the pushing rod to realize the limitation of the embolic coil, therefore, a structure that a limit step or an end cover and the like limit the releasing ball is not needed to be arranged at the far end port of the push rod, the problem that the releasing ball cannot be released because the releasing ball is blocked by the limit step or the end cover when being released from the far end port is avoided, so that the releasing ball can be conveniently, quickly and accurately released from the pushing rod when the releasing wire is pulled out, namely, the releasing ball is separated from the limit notch and is released from the far end port to complete the releasing, thereby greatly facilitating the releasing of the embolic coil, and the detachment is quick, the operation time can be greatly saved, the detachment success rate is high, and the problem of false positive detachment is avoided.

2. When the embolism spring coil is in spacing state, the release ball is partly blocked in spacing breach at least to form the spacing to the embolism spring coil, guarantee convenience, quick and accuracy when spacing reliability and release, simultaneously, when releasing the embolism spring coil, take out the release silk, make the release ball break away from spacing breach and realize the release, this kind of release and spacing mode, simple structure not only, and convenient release and spacing reliable.

3. The width of the limiting notch is set to be not less than the diameter of the releasing ball, so that the matching limiting reliability of the releasing ball and the limiting notch and the convenience and timeliness in releasing are guaranteed.

4. Through being circular or oval or U-shaped with spacing breach setting, spacing reliability of assurance that can not only be fine reaches convenience and promptness when breaking away, and the processing production of the spacing breach of being convenient for improves production machining efficiency.

5. In order to facilitate the connection of the release ball and the embolic coil, the release ball can be connected with a connecting wire, the diameter of the release ball is set to be D1, the wire diameter of the connecting wire is set to be D2, and D1 is 2D2, so that the release ball and the embolic coil are conveniently connected, the connection strength is sufficient, and the connection stability is good.

6. The line footpath of connecting wire equals the line footpath of the release silk, can guarantee like this that push rod and embolism spring circle have higher joint strength, improves the stability of connecting.

7. The interference magnitude of the releasing wire and the releasing ball matched with the inner diameter of the pushing rod is smaller than the wall thickness of the pushing rod, so that the releasing ball is released from the far end port of the pushing rod when the releasing is convenient, and the problem of releasing false positive is avoided.

8. The near-end of push rod is equipped with the near-end connecting piece, and the near-end connecting piece is fixed and with the push rod welding with the release silk, in order to realize the release to the release silk through the near-end connecting piece like this, and the release is convenient, reliable and stable.

9. The indication tube is arranged at the welding joint of the near-end connecting piece and the push rod, so that the user can conveniently know that the near-end connecting piece is bent or broken from the welding joint, the operation of releasing the release wire is convenient, the releasing speed is improved, and the operation time is shortened.

Drawings

The utility model will be further described with reference to the accompanying drawings in which:

fig. 1 is a schematic structural view of a vasoocclusive coil system in accordance with the present invention.

Fig. 2 is a schematic partially cut-away perspective view of a vasoocclusive coil system in accordance with the present invention.

Fig. 3 is a schematic perspective view of a vasoocclusive coil system in accordance with the present invention.

Fig. 4 is an axial cross-sectional schematic view of a vasoocclusive coil system in accordance with the present invention.

Fig. 5 is a schematic axial cross-sectional view of a vasoocclusive coil system according to the present invention shown in a disengaged position.

Fig. 6 is a schematic view of the vasoocclusive coil system of the present invention with the implanted coil disengaged from the push rod.

Fig. 7 is a schematic view of the proximal end operation of the vasoocclusive coil system of the present invention in its disengaged position.

Fig. 8 is a graphical representation of the results of the release of the vasoocclusive coil system of the present invention.

The names of the components marked in the figures are as follows:

20. connecting wires; 21. releasing the balls; 40. an embolic coil; 50. a proximal connector; 51. an indicator tube; 60. a push rod; 61. an inner cavity; 62. a limiting notch; 70. heat shrink tubing; 80. releasing the silk; 90. and developing the mark.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are not connected to each other by the intermediate structure but connected to each other by the connecting structure to form a whole. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 6, the present invention provides a mechanically released vasoocclusive coil system, which comprises a pushing rod 60 having a lumen 61, a releasing wire 80 and a releasing ball 21 arranged in the lumen 60, and an occlusive coil 40 connected with the releasing ball 21, wherein a limiting notch 62 is arranged on the side wall of the lumen 61 of the pushing rod 60 near the distal end, the releasing ball 21 is matched with the limiting notch 62 under the action of the releasing wire 80 to be limited in the lumen 61 of the pushing rod 60, by arranging a limiting notch on the side wall of the lumen near the distal end of the pushing rod, the releasing ball is matched with the limiting notch under the action of the releasing wire to be limited in the lumen of the pushing rod, so as to realize the limitation of the occlusive coil, thus a limiting structure for limiting the releasing ball is not required to be arranged at the distal end port of the pushing rod, and the problem that the releasing ball is blocked by the limiting step or the end cap when being released from the distal end port is avoided, make the liberation ball when the liberation silk is taken out, can make things convenient for, quick and accurate break away from the push rod, the liberation ball breaks away from spacing breach promptly and deviates from the distal end port and can accomplish the liberation to make things convenient for the liberation of embolism spring coil greatly, and the liberation is quick, can save the time of operation greatly, and the rate of success of liberation is high simultaneously, avoids appearing the problem that false positive liberated.

In this embodiment, this mechanical release's vascular embolism spring coil system is still including the pyrocondensation pipe 70 and the development mark 90 of cover on push rod 60, and vascular embolism spring coil system is under spacing state, release ball 21 at least part card is gone into in spacing breach 62, in order to form spacing to embolism spring coil 40, guarantee spacing reliability and convenience when releasing, it is quick and accurate, and simultaneously, when releasing embolism spring coil 40, release wire 80 is taken out, thereby make release ball 21 break away from spacing breach 62 mouthful and realize the release, this kind of release and spacing mode, and is simple structure, and convenient release and spacing reliable.

Wherein, the width of spacing breach 62 is not less than the diameter of freeing ball 21, guarantees like this that the spacing reliability of cooperation and the convenience and the promptness when breaking away from of freeing ball and spacing breach.

Secondly, can be with spacing breach 62 setting be the U-shaped, the spacing reliability of assurance that can not only be fine, and convenience and promptness when breaking away, and the processing production of the spacing breach of being convenient for improves production machining efficiency.

Meanwhile, in order to facilitate the connection of the release ball and the embolic coil, the connection wire 20 can be connected to the release ball 21, the diameter of the release ball 21 is set to be D1, the wire diameter of the connection wire 20 is set to be D2, and D1 is 2D2, so that the release ball and the embolic coil can be conveniently connected, the connection strength is sufficient, and the connection stability is good.

In addition, the wire diameter of the connecting wire 20 can be equal to that of the release wire 80, so that the higher connection strength between the pushing rod and the embolic coil can be ensured, and the connection stability is improved; and the interference magnitude of the matching of the release wire 80, the release ball 21 and the inner diameter of the push rod 60 can be smaller than the wall thickness of the push rod 60, so that the release ball is conveniently released from the far end port of the push rod during release, and the problem of false positive release is avoided.

In order to facilitate the operation of the unthreading wire, a proximal end connecting piece 50 may be disposed at the proximal end of the pushing rod 60, and the proximal end connecting piece 50 is fixed to the unthreading wire 80 and welded to the pushing rod 60, so that the unthreading wire is unthreaded through the proximal end connecting piece, and the unthreading is convenient, reliable and stable.

Finally, also in order to facilitate bending of the proximal connector, an indicator tube 51 may be provided at the welded junction of the proximal connector 50 and the push rod 60, so that it is convenient to know from which to bend or break the proximal connector to facilitate the operation of releasing the release wire, thereby increasing the release speed to reduce the operation time.

It will be appreciated that the spacing notch may also be circular or oval.

In addition to the above preferred embodiments, the technical solutions protected by the present invention are not limited to the above embodiments, and it should be noted that the technical solutions of any one embodiment are combined with the technical solutions of one or more other embodiments within the protection scope of the present invention. Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims

1. The utility model provides a vascular embolism spring coil system that machinery was liberated, its characterized in that, including the push rod that has the inner chamber, locate the liberation silk and the liberation ball of inner chamber and with the embolism spring coil that the liberation ball is connected, the push rod is close to and is equipped with spacing breach on the inner chamber lateral wall of distal end, the liberation ball in the effect of liberation silk with spacing breach cooperation in order to be restricted in the inner chamber of push rod.

2. The vasoocclusive coil system of claim 1, wherein the vasoocclusive coil system is configured such that in a restraining state, the release ball at least partially snaps into the restraining notch.

3. The vasoocclusive coil system of claim 2, wherein the vasoocclusive coil system in a disengaged state, the release ball disengages the retention notch and the push rod from the distal end to release the embolic coil.

4. The vasoocclusive coil system of claim 1, wherein the width of the retention notch is no less than the diameter of the relief ball.

5. The vasoocclusive coil system of claim 1, wherein the retention notch is circular or oval or U-shaped.

6. The vasoocclusive coil system of claim 1, wherein said release balloon has a connecting wire attached thereto, said release balloon having a diameter of D1, said connecting wire having a wire diameter of D2, D1-2D 2.

7. The vasoocclusive coil system of claim 6, wherein the wire diameter of the connecting wire is equal to the wire diameter of the release wire.

8. The vasoocclusive coil system of claim 6, wherein the interference of the release wire and release ball with the inner diameter of the push rod is less than the wall thickness of the push rod.

9. The vasoocclusive coil system of claim 1, wherein the proximal end of the push rod is provided with a proximal connector, the proximal connector secured to the release wire and welded to the push rod.

10. The vasoocclusive coil system of claim 9, wherein an indicator tube is provided at a weld junction of the proximal connector and the push rod.