CN218356284U - Conveyor and spring coil system - Google Patents

Abstract

The utility model provides a conveyer and spring coil system, wherein the conveyer is used for carrying the spring coil implant, the conveyer includes core silk and control tube, the core silk is worn to locate in the control tube, and with control tube fixed connection, the distal end of core silk can be linked to each other with the near-end of spring coil implant can take off, the distal end of core silk is equipped with the region of liberating, the core silk is equipped with buffer structure in the near side of the region of liberating, buffer structure is located the far side of control tube, but elastic deformation when buffer structure receives the effort to slow down the kinetic energy of far side transmission to near side by buffer structure, the utility model discloses a conveyer can prevent in the use that the mouth of pipe of control tube from moving by a wide margin.

Description

Conveyor and spring coil system

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a conveyer and spring coil system.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

Hemangiomas are hemangioma-like bulges caused by angiopathy. Especially aneurysms, which bleed when the blood pressure within the vessel rises, can cause the patient to be disabled or die. With the development of imaging technology and intravascular materials, interventional therapy has replaced surgical aneurysm clipping surgery as the first choice for treating intracranial aneurysms due to lower risk and less trauma than surgical intervention.

The existing spring coil system comprises a spring coil implant and a conveyor, wherein the conveyor comprises a microcatheter, an operating tube and a core wire, the distal end of the core wire is connected with the proximal end of the spring coil implant, and the core wire is fixedly connected with the operating tube.

When the micro catheter is used, the micro catheter is conveyed along a blood vessel, a pipe orifice at the far end of the micro catheter enters a tumor cavity, and a pipe orifice at the near end of the micro catheter is placed outside the body, so that a conveying path from the outside of the body to a lesion part is established. After the spring coil implant, the operating tube and the core wire are conveyed to the aneurysm cavity along the tube cavity of the microcatheter, the far end of the core wire is disconnected with the spring coil implant, and the purpose of treating the aneurysm is achieved by filling the spring coil implant in the aneurysm.

However, when the core wire and the spring ring implant are disengaged, the core wire and the spring ring implant are instantaneously disconnected, the core wire receives the reaction force of the spring ring implant, the core wire transmits the action force to the operating tube, and the operating tube transmits the action force at least partially to the micro-catheter, so that the distal orifice of the micro-catheter can be greatly moved, and the distal orifice of the micro-catheter is moved out of the tumor cavity, namely the kicking tube in the field. Once the distal orifice of the microcatheter is moved out of the tumor cavity, the position of the distal orifice of the microcatheter needs to be adjusted again so that the distal orifice of the microcatheter is re-implanted into the tumor cavity to establish a delivery path for subsequent coil implant implantation into the tumor cavity (generally, three to five coil implants need to be packed into one tumor cavity).

As shown in FIG. 1, since the distal end of the core wire 11 is connected to the coil implant 21 and the core wire 11 is fixedly connected to the operation tube 12, the distal end of the core wire 11 is provided with a release region 111, and the operation tube 12 is slidably inserted into the lumen of the microcatheter 13 (the inner diameter of the microcatheter 13 is close to the outer diameter of the operation tube 12). When the operation tube 12, the spring ring implant 21 and the distal end of the core wire 11 are released, the distal end is pushed into the tumor cavity from the distal end orifice of the microcatheter 13, and then the electricity is supplied to perform the release. As shown in fig. 2 and 3, when the core wire 11 is in a bent state in the tumor cavity during the releasing, and the core wire 11 is disconnected from the spring ring, the core wire 11 is no longer subjected to the traction binding force applied thereto by the spring ring implant 21, and the core wire 11 is greatly shaken. Since the core wire 11 is fixedly connected with the operation tube 12, and the operation tube 12 is disposed in the lumen of the micro-catheter 13, which is equivalent to the indirect connection between the core wire 11 and the micro-catheter 13, the core wire 11 can feed back the jitter to the micro-catheter 13, resulting in a large movement of the distal orifice of the micro-catheter in the aneurysm. Movement of the microcatheter may cause the microcatheter to detach from the aneurysm, causing kicking of the microcatheter. If the complete coil implant 21 is not implanted, the distal nozzle of the microcatheter 13 needs to be moved into the tumor cavity again when the coil implant 21 needs to be implanted again, which results in longer operation time and risks during the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at least solving the technical problem that the far end pipe orifice of the microcatheter is moved by a wide margin when the spring ring implant is implanted. The purpose is realized by the following technical scheme:

the embodiment of the application provides a conveyer for carry the spring coil implant, the conveyer includes core silk and control tube, the core silk is worn to locate in the control tube, and with control tube fixed connection, the distal end of core silk can be continuous with the near-end of spring coil implant with disengaging, the distal end of core silk is equipped with the region of disengaging, the core silk is equipped with buffer structure in the near side of region of disengaging, buffer structure is located the far side of control tube, but buffer structure elastic deformation when receiving the effort, thereby slow down the kinetic energy of transmitting to the near side by buffer structure's far side.

In one embodiment, a spring coil system is disclosed comprising a spring coil and the above-described delivery device, wherein the distal end of the core wire is releasably coupled to the proximal end of the spring coil implant, and wherein the outer diameter of the handle tube is less than or equal to the maximum outer diameter of the buffer structure.

The conveyer is provided with a buffer structure extending spirally on the near side of the releasing area, and the acting force formed by the core wire in the releasing area is transmitted to the near side at the moment of breaking the core wire; when transmitting to buffer structure, because buffer structure receives elastic deformation when effort to slow down the kinetic energy through the buffer structure transmission, and then can reduce the motion range of slowing down or eliminating the operation pipe distal end by a wide margin, further can avoid the core silk to drive operation pipe and little pipe motion, make the difficult emergence of little pipe remove, little pipe can not break away from the aneurysm promptly, can not produce the phenomenon of playing the pipe, thereby reduce operator's the operation degree of difficulty, reduce the risk in the art.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of a spring coil system of the prior art;

FIG. 2 is a schematic view of a prior art spring coil system as implanted;

FIG. 3 is an enlarged view of III in FIG. 2;

FIG. 4 is a schematic view of a spring coil system according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of the guide wire according to the first embodiment of the present invention;

FIG. 6 is a first state view of the coil implant of the first embodiment of the present invention;

FIG. 7 is a second state view of the coil implant of the first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a buffering structure according to a first embodiment of the present invention;

fig. 9 is a schematic structural view of a handling tube according to a first embodiment of the present invention;

FIG. 10 is a schematic diagram of a spring coil system according to a second embodiment of the present invention;

fig. 11 is a schematic structural view of a buffering structure according to a third embodiment of the present invention;

fig. 12 is a schematic structural diagram of a buffer structure according to a fourth embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both an up and down orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present application, an end close to the operator in use is referred to as a "proximal end", an end far from the operator is referred to as a "distal end", and "proximal end", "distal end", "proximal side", and "distal side" are defined according to this principle.

First embodiment

As shown in FIG. 4, the present embodiment discloses a spring coil system 300 including a spring coil implant 31 and a delivery device 41, wherein the distal end of the delivery device 41 is releasably coupled to the spring coil implant 31 for delivery of the spring coil implant 31.

Conveyor 41 includes a core wire 43, an handling tube 57, and a microcatheter 59.

The operation tube 57 and the micro-catheter 59 are both hollow tube structures, and the outer diameter of the operation tube 57 is smaller than or equal to the inner diameter of the micro-catheter 59.

As shown in fig. 5, the core wire 43 is made of an elastic metal material having conductivity, such as stainless steel, the distal end of the core wire 43 is releasably connected to the proximal end of the spring ring implant 31, the core wire 43 includes a straight extension 45, a curved extension 47 and a releasable section 53, and the straight extension 45, the curved extension 47 and the releasable section 53 are sequentially arranged from proximal to distal and connected to each other. The straight extension 45 is located proximally relative to the curved extension 47, the straight extension 45 extending substantially linearly. Releasable section 53 is distally located relative to curvilinear extension 47, and releasable section 53 is releasably connected to spring coil implant 31.

The outer surface of the core wire 43 is coated with an insulating layer, and the core wire 43 is provided with a turn of exposed metal area inside the disengageable section 53, thereby forming a disengagement zone 55 at the distal end of the core wire 43 (i.e., forming the disengagement zone 55 inside the disengageable section 53). When the core wire 43 is energized, the bare metal of the relieved area 55 can be electrolyzed in the blood, thereby disconnecting the core wire 43 from the spring coil implant 31.

The curvilinearly extending segment 47 in this embodiment extends along a helical line such that the core wire 43 forms a buffer structure 49 proximal to the relieved area 55, the buffer structure 49 being elastically deformable upon application of a force to dampen the kinetic energy transmitted from the distal side to the proximal side of the buffer structure 49.

When the core wire 43 is connected to the operation tube 57, the core wire 43 is inserted into the operation tube 57 and is fixedly connected to the operation tube 57. The distal end of the core wire 43 protrudes from the distal end orifice of the handling tube 57 and is releasably coupled to the spring coil implant 31 such that the buffer structure 49 and the release area 55 are both distal to the handling tube 57.

As shown in fig. 6, in use, the distal end orifice of the microcatheter 59 is placed into a blood vessel to establish a delivery channel from outside the body to the aneurysm, the distal end orifice of the microcatheter 59 is maintained in the aneurysm, the core wire 43, the operating tube 57 and the coil implant 31, which are assembled together, are delivered along the lumen of the microcatheter 59, the whole body of the coil implant 31 is electrically released after entering the aneurysm cavity, so that the coil implant 31 remains in the aneurysm cavity and fills the aneurysm cavity, then the core wire 43 and the operating tube 57 are withdrawn to the outside of the body, the orifice of the microcatheter 59 remains in the aneurysm cavity, and then the other assembled core wire 43, operating tube 57 and coil implant 31 are delivered to the aneurysm cavity along the microcatheter 59 again to be filled. Generally, one tumor cavity requires about five coil implants 31 to be packed. Prior to implantation of all of the coil implants 31, it is necessary to ensure that the mouth of the microcatheter 59 is within the tumor space. It should be noted that, in order to clearly illustrate the implantation of the coil implant 31, the present embodiment is only illustrated with respect to the implantation of one coil implant 31, since a plurality of coil implants 31 may be hidden from each other within the tumor cavity, thereby visually interfering.

When conveyer and spring coil implant among the prior art are got rid of, the moment of core silk and spring coil implant separation, the constraint force of spring coil implant to core silk disappears in the twinkling of an eye, the core silk is because no longer receive the spring coil implant to its traction constraint power that produces, the core silk receives effort (for example the tension of core silk self) in the region of getting rid of and is transmitted to the near-end of core silk by the region of getting rid of, can make the core silk produce shake by a relatively large margin, and the core silk can transmit kinetic energy for operation tube and pipe a little, thereby drive operation tube and pipe a little shake by a wide margin.

As shown in fig. 7, the conveyer 41 of the present embodiment is provided with the buffer structure 49 extending in a spiral shape on the near side of the releasing area 55, and at the moment when the core wire 43 is broken, the acting force (for example, the elastic force of the core wire 43 itself and/or the tension of the core wire 43) formed by the core wire 43 in the releasing area 55 is transmitted to the near side; when the force is transmitted to the buffer structure 49, the buffer structure 49 can be elastically deformed (for example, axially stretched or radially swung) when receiving the acting force, so that the kinetic energy transmitted through the buffer structure 49 is reduced, the movement amplitude of the distal end of the operation tube 57 can be greatly reduced or eliminated, and further the movement of the operation tube 57 and the micro-catheter 59 driven by the core wire 43 can be avoided. Make little pipe 59 difficult emergence removal, little pipe 59 can not break away from the aneurysm promptly, can not produce the phenomenon of playing the pipe to reduce operator's the operation degree of difficulty, reduce the intraoperative risk.

The buffer structure 49 is made of an elastic material, and the buffer structure 49 extends spirally, so that the maximum outer diameter of the buffer structure 49 is smaller than or equal to the inner diameter of the micro-catheter 59 when the buffer structure 49 is in a stretched state, so that the core wire 43 can be pushed along the lumen of the micro-catheter 59. In one embodiment, the maximum outer diameter of the buffer structure 49 in its natural state may be larger than the inner diameter of the micro-catheter 59 or smaller than the inner diameter of the micro-catheter 59, as long as the maximum outer diameter of the buffer structure 49 in its stretched state may be smaller than or equal to the inner diameter of the micro-catheter 59.

In this embodiment, the maximum outer diameter of the buffer structure 49 is greater than or equal to the outer diameter of the operation tube 57, so that the buffer structure 49 has better elasticity.

As shown in fig. 8, in the present embodiment, the outer diameters of the buffer structures 49 are the same along the length direction of the buffer structures 49, so that the outer diameters of all the spiral portions are larger, and further the elasticity of the buffer structures 49 is increased, and the same outer diameters of the buffer structures 49 can further make the buffering effect of the buffer structures 49 more balanced.

As shown in FIG. 9, spring coil system 300 further includes an electrically conductive member 58, electrically conductive member 58 being disposed within the lumen at the distal end of operative tube 57. Upon electrolysis, the electrically conductive member 58 is electrically connected to the negative pole of the power source, the guidewire is electrically connected to the positive pole of the power source, both are routed through the blood, and the detachment zone 55 is electrolyzed, thereby disconnecting the coil implant 31 from the delivery 41.

The operating tube 57 comprises a spring tube 57a at a relatively far side and a stainless steel tube 57b at a relatively near side, the spring tube 57a is connected with the stainless steel tube 57b, the spring tube 57a enables the far end of the operating tube 57 to have better flexibility so as to enter a tortuous blood vessel, and the stainless steel tube 57b enables the near end of the operating tube 57 to have better rigidity so as to retreat into the blood vessel. The electrically conductive member 58 is located inside the distal end of the spring tube 57 a.

Second embodiment

As shown in fig. 10, the present embodiment is different from the first embodiment in that the buffer structure 49 includes outer diameters of at least two specifications in the length direction of the buffer structure 49.

In the present embodiment, the outer diameter of the buffer structure 49 gradually decreases from the proximal end to the distal end along the extending direction of the buffer structure 49, so that the buffer structure 49 is substantially in the shape of a conical spiral.

The maximum outer diameter of the buffer structure 49 is the same as the outer diameter of the embolic coil, thus ensuring that the buffer structure 49 can be smoothly pushed in the microcatheter 59 and maintaining the buffer characteristic of the buffer structure 49. Of course, in other embodiments, the maximum outer diameter of the buffer structure 49 may also be greater than the outer diameter of the embolic coil, or the maximum outer diameter of the buffer structure 49 may be less than the outer diameter of the embolic coil, so long as the outer diameter of the buffer structure 49 after being stretched is less than or equal to the inner diameter of the microcatheter 59. Of course, in other embodiments, the maximum outer diameter of the buffer structure 49 in its natural state when not subjected to external forces is less than or equal to the inner diameter of the micro-catheter 59, thereby allowing the carrier 41 to be transported more smoothly within the micro-catheter 59.

Third embodiment

As shown in fig. 11, the buffer structure 49 of the present embodiment includes a plurality of spiral sub-units 11 connected to each other, and the present embodiment is different from the second embodiment in that the outer diameters of two adjacent spiral sub-units 11 are different, and the outer diameters of the spiral sub-units 11 located on both sides of the same spiral sub-unit 11 are the same. The number of the screw subunits 11 having a larger outer diameter can be reduced as compared with the first embodiment, and thus the frictional resistance against the core wire 43 pushed inside the microcatheter 59 can be reduced.

Fourth embodiment

In one embodiment, as shown in fig. 12, the spiral portions of the buffer structure 49 are all in the same plane, and the outer diameter of the buffer structure 49 gradually decreases along the extending direction of the buffer structure 49, and the maximum outer diameter of the planar spiral structure of the core wire 43 is close to that of the embolic coil, thereby ensuring the smooth passage of the spiral guide wire in the microcatheter 59 and maintaining the buffer property of the spiral guide wire.

At the same time, since the buffer structure 49 extends spirally in the same plane, the axial length of the buffer structure 49 is shortened, and the distance between the disengagement area 55 and the electrically conductive member 58 is shortened. When the core wire 43 is connected to the positive pole of the power source and the conductive member 58 is connected to the negative pole of the power source, both of which are connected through the blood, the resistance is reduced due to the reduction in the distance between the releasing section 55 and the conductive member 58, and the influence of the electrolytic releasing time can be reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A conveyer is used for conveying a spring ring implant and comprises a core wire and an operating pipe, wherein the core wire is arranged in the operating pipe in a penetrating mode and fixedly connected with the operating pipe, the distal end of the core wire is detachably connected with the spring ring implant, the distal end of the core wire is provided with a releasing area, the core wire is provided with a buffer structure on the near side of the releasing area, the buffer structure is located on the far side of the operating pipe, and the buffer structure can be elastically deformed when being subjected to acting force, so that the kinetic energy transmitted from the far side of the buffer structure to the near side is reduced.

2. A conveyor apparatus according to claim 1, further comprising a micro-duct, wherein said buffer structure is made of an elastic material, said buffer structure extends helically, and the maximum outer diameter of said buffer structure in a stretched state is smaller than or equal to the inner diameter of said micro-duct; the outer diameter of the operating tube is less than or equal to the inner diameter of the microcatheter.

3. A conveyor according to claim 2, characterised in that the outer diameter of the buffer structure is the same along its length.

4. A conveyor according to claim 2, wherein said buffer structure comprises at least two gauge outer diameters along the length of said buffer structure.

5. Conveyor according to claim 4, characterized in that the outer diameter of the buffer structure decreases from the proximal end to the distal end in the direction of extension of the buffer structure.

6. A conveyor according to claim 4, characterised in that the helical portions of the buffer structure are all located in the same plane, the outer diameter of the buffer structure decreasing in the direction of extension of the buffer structure.

7. The delivery device of claim 6, further comprising an electrically conductive member disposed within the lumen at the distal end of the operating tube, the electrically conductive member being negatively charged when energized.

8. A conveyor as in claim 4 wherein the buffer structure comprises a plurality of interconnected spiral sub-units, adjacent ones of the spiral sub-units having different outer diameters, and the spiral sub-units on opposite sides of the same spiral sub-unit having the same outer diameter.

9. A delivery device according to any of claims 4 to 7, wherein the buffer structure has a maximum outer diameter which is greater than the inner diameter of the micro-catheter when in its natural state.

10. A spring coil system comprising a spring coil and the delivery apparatus of any one of claims 1-9, the distal end of the core wire being releasably coupled to the proximal end of the spring coil implant, the operating tube having an outer diameter less than or equal to the maximum outer diameter of the buffer structure.

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