CN115869031A - Spring ring for blocking blood flow and release system thereof - Google Patents

Abstract

The invention provides a spring ring for blocking blood flow and a release system thereof, relating to the technical field of medical instruments. The blood flow blocking spring ring comprises a spring ring body and a fiber wire, wherein the spring ring body is formed by winding a spring body which is formed by spirally processing a spring wire, at least part of the fiber wire is positioned in the spring ring body, and at least one end of the fiber wire extends out of the outer surface of the spring ring body; the spring body is internally provided with a first anti-unscrewing wire and a second anti-unscrewing wire which are attached side by side in a penetrating manner. The double-strand anti-unwinding wire is used for preventing the spring ring from unwinding, the double-strand anti-unwinding wire is used for primarily fixing the fiber wire, the double-strand anti-unwinding wire is multifunctional, the fiber wire is wound and finally fixed through the spring wire, knotting of the fiber wire is not needed, the problems that the fiber wire falls off and the outer diameter of the spring body is increased are solved, the two sides of the fiber wire are located outside the spring body and are subjected to lock treatment, and the embolism effect can be further improved.

Description

Spring ring for blocking blood flow and release system thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a spring coil for blocking blood flow and a spring coil release system with the spring coil for blocking blood flow.

Background

In the process of the vascular occlusion therapy, the spring ring and other implants are required to be implanted into the blood vessel of a human body through the spring ring release system for blocking blood flow, and in order to improve the operation treatment efficiency, the prior art binds fiber wires on the spring ring, thereby improving the thrombus-making effect.

However, the existing fiber binding method generally clamps the fiber line through the gap between adjacent spring wires of the spring ring, and the method has poor fixing effect and is easy to cause the fiber line to fall off to cause serious adverse events such as distal embolism and the like; in addition, the other mode is used for knotting and fixing the fiber wires on the spring wires, the operation is difficult and the efficiency is low, and the lap joint is exposed, so that the conveying resistance of the spring wires is increased. In addition, the existing spring ring release structure also has the problems of complex operation, low efficiency, easy release failure and the like.

Disclosure of Invention

The invention aims to provide a spring coil for blocking blood flow and a release system thereof, and aims to solve the technical problems wholly or partially.

In order to solve the problems, the invention firstly provides a spring ring for blocking blood flow, which comprises a spring ring body and a fiber wire, wherein the spring ring body is formed by winding a spring body formed by spirally processing a spring wire; follow spring body length direction, wear to be equipped with first anti unwinding wire and the second anti unwinding wire that the laminating set up side by side in the spring body, the fibre line through following mode ligature in first anti unwinding wire with the second is anti unwinding wire:

s1, straightening the spring body before the spring body is wound and molded into the spring ring body, stretching at least part of the spring body to a deformation state, and forming a plurality of first binding spaces by the stretched spring wires of the spring body;

s2, penetrating a first anti-unwinding wire and a second anti-unwinding wire which are longer than the straightened spring body into a channel formed by the spring body to ensure that the first anti-unwinding wire and the second anti-unwinding wire are in a vertically parallel and fixed state, and forming a second binding space between the first anti-unwinding wire and the second anti-unwinding wire;

s3, a double-stranded closed-loop fiber wire penetrates through the second binding space, the middle of the fiber wire is kept between the first anti-unwinding wire and the second anti-unwinding wire, and the fiber wire is provided with a first part located on one side of the first anti-unwinding wire and the second anti-unwinding wire and a second part located on the other side of the first anti-unwinding wire and the second anti-unwinding wire;

s4, translating the first anti-unwinding yarns or the second anti-unwinding yarns to enable the first anti-unwinding yarns and the second anti-unwinding yarns to be attached side by side, and clamping the fiber wires;

s5, fixedly connecting one end of the first anti-unscrewing wire and one end of the second anti-unscrewing wire with a fixed end head of the spring body;

s6, erecting and winding the first part on the first anti-unwinding wire and/or the second anti-unwinding wire along a first circumferential direction, and erecting and winding the second part on the second anti-unwinding wire and/or the first anti-unwinding wire along a second circumferential direction, wherein the first circumferential direction is the same as or opposite to the second circumferential direction;

s7, releasing the stretching of the spring body, and clamping the first part and the second part by two adjacent circles of spring wires;

and S8, cutting redundant first anti-unwinding yarns and second anti-unwinding yarns, and fixedly connecting the other ends of the first anti-unwinding yarns and the second anti-unwinding yarns.

Adopt above-mentioned technical scheme, play through the anti helicla silk of bifilar and prevent when the spring coil unrotates, utilize the anti helicla silk of bifilar to carry out the preliminary fixed of fibre line, it is integrative multi-purpose, then carry out final fixed through the spring silk after twining the fibre line, need not to knot the fibre line and handle, compare in traditional ligature mode convenient operation not only, it is fixed effectual, the fibre line can not appear and drop and increase the problem of spring body external diameter, and the both sides of fibre line all are located the spring body and outside and beat the lock and handle, also can further improve the embolism effect.

Further, the step of binding the fiber thread to the first anti-unwinding thread and the second anti-unwinding thread further comprises: s9, conducting lock treatment on the first portion and the second portion, and dividing the first portion and the second portion into a plurality of fiber yarns.

By adopting the technical scheme, the first part and the second part of the two sides of the fiber thread, which are positioned outside the spring body, are subjected to the lock beating treatment to form a plurality of fiber yarns, so that the embolism effect is further improved.

Further, the first portion has a length greater than a length of the second portion, the first portion is located outside the spring ring after the spring body is wound to form the spring ring, and the second portion is located at least partially inside the spring ring.

Adopt above-mentioned technical scheme, be greater than second partial length with first partial length design, avoid both to interfere mutually when the winding to arrange longer first portion in and play good embolism effect outside the spring coil, arrange shorter second portion in the spring coil, can reduce the waste of cellosilk when supplementary embolism.

Furthermore, one side of the first anti-unscrewing wire, which faces the second anti-unscrewing wire, is provided with a first clamping plane, one side of the second anti-unscrewing wire, which faces the first anti-unscrewing wire, is provided with a second clamping plane, and the fiber wire is clamped between the first clamping plane and the second clamping plane.

Adopt above-mentioned technical scheme, press from both sides tight planar cooperation through first tight plane of clamp and second and can improve the clamp force to the fibre line, avoid the fibre line to break away from the spring coil.

Further, the first clamping plane and/or the second clamping plane are provided with friction particles.

Adopt above-mentioned technical scheme, utilize the friction particle to improve the frictional force that first clamp plane and second press from both sides tight plane and fibre line, further improve the stability after the fibre line is fixed.

Furthermore, a first fixing hole, a second fixing hole and a third fixing hole are formed in one side, facing the first anti-unscrewing wire and the second anti-unscrewing wire, of the fixing end, the first fixing hole and the second fixing hole are arranged at an interval, the third fixing hole is located between the first fixing hole and the second fixing hole and is adjacent to the first fixing hole, and a clamping groove is formed between the third fixing hole and the second fixing hole; one end of the first anti-unwinding wire is inserted into the first fixing hole and is tightly matched with the first fixing hole; the second anti-unscrewing wire sequentially comprises a first inserting portion, a breaking body, a connecting belt and a second inserting portion along the direction departing from the fixing end, one end of the first inserting portion is configured to be capable of being inserted into and tightly matched with the second fixing hole, the other end of the first inserting portion is connected with one end of the second inserting portion through the breaking body, the breaking body is configured to be capable of being disconnected with the first inserting portion and the second inserting portion under the action of external force, the length of the breaking body is equal to that of the clamping groove and can be clamped in the clamping groove, and the connecting belt is respectively connected with the first inserting portion, the breaking body and the second inserting portion; wherein the second anti-unwinding wire is connected with the fixed end head by: inserting one end of the second anti-unscrewing wire into the second fixing hole; breaking the breaking body to disconnect one end of the breaking body with the first plug part, and to disconnect the other end of the breaking body with the second plug part, and placing the breaking body in the clamping groove; and inserting the second inserting part into the third fixing hole.

Adopt above-mentioned technical scheme, utilize first fixed orifices and second fixed orifices to be convenient for first anti unwinding silk of first and the second is anti to unwind preliminary fixed of spinning, and then do benefit to passing of fibre line, and through the design of fracture body and connecting band, be convenient for to resist the unwinding silk translation of second to the third fixed orifices and fix for first anti unwinding silk and the second is anti to unwind the silk and laminates centre gripping fibre line side by side, and the structure is ingenious, easy operation.

Furthermore, the connecting band is the same as the second anti-unwinding wire in quality and is in hot-melt connection with the first plug-in part, the breaking body and the second plug-in part.

By adopting the technical scheme, the structural stability of the second anti-unwinding yarn can be further improved.

The invention also provides a blood flow blocking spring ring release system, which comprises a catheter mechanism, a delivery mechanism, a release mechanism and the blood flow blocking spring ring in the technical scheme, wherein at least part of the delivery mechanism, the release mechanism and the blood flow blocking spring ring are positioned in the catheter mechanism, and the far end of the delivery mechanism is connected with the blood flow blocking spring ring through the release mechanism; wherein the release mechanism is configured to: and operating the proximal end of the delivery mechanism to actuate the release mechanism, so that the spring ring for blocking the blood flow is separated from the delivery mechanism.

Adopt above-mentioned technical scheme, make the improvement to the ligature structure of fibre line on the spring coil, the fibre line is tentatively fixed through the anti untwisted silk of bifilar, then elasticity through the spring body carries out the centre gripping to the both sides of fibre line fixed, need not to knot the fibre line and handle, compare in traditional ligature mode convenient operation not only, it is fixed effectual, the fibre line can not appear and drop and increase the problem of spring body external diameter, the both sides of fibre line all are located the spring body and outside and beat the lock and handle, also can further improve the embolism effect.

Further, the release mechanism comprises a guide sleeve, a first release member and a second release member; the guide sleeve is arranged in the catheter mechanism, the outer diameter of the guide sleeve is smaller than the inner diameter of the catheter mechanism, a first limiting part is arranged on the outer wall of the far end of the guide sleeve, and a second limiting part which can be in limiting fit with the first limiting part is arranged on the inner wall of the far end of the catheter mechanism; the first releasing piece and the second releasing piece are slidably mounted in the guide sleeve, one end of the first releasing piece is connected with the conveying mechanism, the other end of the first releasing piece is provided with a shape memory alloy part, one end of the second releasing piece is provided with a slot matched with the shape memory alloy part in an inserting mode, a limiting groove is formed in the side wall of the slot, a space for bending deformation of the shape memory alloy part is formed in the limiting groove, the shape memory alloy part is configured to at least partially extend into the limiting groove at a first temperature and be separated from the limiting groove at a second temperature, and the first temperature is lower than the second temperature.

Adopt above-mentioned technical scheme, need not medical personnel and carry out operations such as rupture, act as go-between and release the processing, directly arrange the spring coil in blood certain time can automatic untwist, alleviateed medical personnel's operation, improve and know and take off efficiency and the degree of accuracy.

Furthermore, the conveying mechanism comprises a conveying pipe connected with the releasing mechanism, spiral grooves are formed in the conveying pipe along the length direction of the conveying pipe, and the distance between every two adjacent spiral grooves is gradually reduced from the near end to the far end of the conveying pipe.

Adopt above-mentioned technical scheme, utilize the helicla flute to be convenient for the crooked transport of conveyer pipe to adopt the design of gradual change interval, make the conveyer pipe soft gradually by near-end to distal end, reinforcing transport performance, reduction are to the influence at catheter tip.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a spring body of a blood flow occlusion spring coil according to an embodiment of the present invention after being stretched;

fig. 2 is a schematic structural view of a blood flow blocking spring ring according to an embodiment of the present invention after the fiber thread is clamped by a first anti-unwinding wire and a second anti-unwinding wire;

fig. 3 is a schematic structural view of the fiber thread of the blood flow blocking coil according to the embodiment of the present invention after being wound to the first state of the first anti-unwinding thread and the second anti-unwinding thread;

FIG. 4 is a schematic structural view of a fiber strand of a blood flow blocking coil provided in accordance with an embodiment of the present invention after being wound into a second state with first and second anti-unwinding wires;

fig. 5 is a schematic structural view of the fiber thread of the blood flow blocking coil according to the embodiment of the present invention after being wound to the third state of the first anti-unwinding thread and the second anti-unwinding thread;

FIG. 6 is a schematic view of the spring body of a blood flow occluding spring coil according to an embodiment of the present invention after implantation of a fiber optic thread;

FIG. 7 is a schematic diagram of a blood flow blocking spring coil according to an embodiment of the present invention after the spring body is formed into a spring coil;

FIG. 8 is a schematic structural diagram of a fixing end of a blood flow blocking coil and a second anti-unwinding wire according to an embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating a configuration of a spring coil release system for occluding blood flow in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of a blood flow blocking spring coil release system according to an embodiment of the present invention after the spring coil is disengaged;

fig. 11 is a schematic structural view of a delivery tube of a coil delivery system for occluding blood flow provided in accordance with an embodiment of the present invention.

Description of reference numerals:

100-a spring coil body; 110-a spring body; 120-a fixed tip; 121-a first fixing hole; 122-a second fixing hole; 123-a third fixing hole; 124-card slot;

200-fiber thread; 210-a first portion; 220-a second portion;

300-first anti-unwinding filaments; 301-a first clamping plane;

400-second anti-unwinding filaments; 401-a second clamping plane; 410-a first mating part; 420-a breaking body; 430-connecting strips; 440-a second mating part;

500-a catheter mechanism; 510-a second limiting portion;

600-a conveying mechanism; 610-helical groove;

700-a release mechanism; 710-a guide sleeve; 711-a first stop; 720-a first release; 721-a shape memory alloy portion; 730-a second release member; 731-slot.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

In order to solve the problems that the existing fiber fixing method has poor fixing effect and is easy to cause serious distal embolism, or the outer diameter of the spring wire at a knotting point is increased to increase the conveying resistance, the embodiment firstly provides the spring ring for blocking blood flow, and aims to solve the technical problems by improving the structure of the spring ring and the fixing mode of the fiber wire.

Referring to fig. 6 and 7, the blood flow blocking spring ring of the present embodiment includes a spring ring body 100 and a fiber wire 200, wherein the outer diameter of the distal end of the spring ring of the present embodiment is designed to be sixty percent to eighty percent of the outer diameter of the proximal end, which is convenient for anchoring operation, and makes anchoring more firm, and is easier to fix and embolize in blood vessels with large blood flow rate, specifically, the spring ring body 100 is formed by winding a spring body 110 formed by processing a spring wire in a spiral manner, i.e. different from the conventional spring structure form, in the present embodiment, the spring wire is wound in a spiral manner to form the spring body 110, the existing spring structure form of the spring body 110 is the same, and then the spring body 110 is wound in a bending manner to form the spring ring, the structure form of the spring ring may be a regular 3D spring shape in fig. 1, or an irregular 2D shape (this form is not shown in the figure), and the structure diagram of the spring body 110 may refer to fig. 2. It should be noted that the terms "distal" and "proximal" as used in this embodiment refer to the distance from the medical operator when performing the embolization procedure.

The part of the fiber line 200 of this embodiment is located in the spring coil body 100, and at least one end stretches out of the outer surface of the spring coil body 100, in order to be different from the fixed mode of the existing fiber line 200, in the direction of winding the formed spring coil along the spring body 110, the spring body 110 of this embodiment is provided with the first anti-unscrewing wire 300 and the second anti-unscrewing wire 400 in a penetrating way, one end of the first anti-unscrewing wire 300 and one end of the second anti-unscrewing wire 400 are both connected with the fixed end 120 at the far end of the spring coil body 100, the first anti-unscrewing wire 300 and the second anti-unscrewing wire 400 mainly have the effect of preventing the spring coil from being accidentally unscrewed, and the spring coil can be recovered when the medical personnel operate, and when the spring coil is prevented from being recovered, the far end of the spring coil is blocked or the resistance becomes larger to cause the thread pitch to become larger and the unwinding.

Unlike the conventional manner of binding the fiber thread 200, the fiber thread 200 of the present embodiment is fixed to the first and second anti-unwinding threads 300 and 400 by the following steps:

s1, straightening a spring body before the spring body is wound and molded into a spring ring body 100 to form a state shown in the attached drawing 1, stretching at least part of the spring body to a deformation state, and forming a plurality of first binding spaces by spring wires of the stretched spring body; the stretching of the spring body in step S1 may be achieved by a stretching device (not shown in the figure), the stretching device has at least two first clamping mechanisms, the two first clamping mechanisms can clamp and fix two ends of the spring body, and the two first clamping mechanisms can be close to or away from each other, so as to achieve the stretching fixation and the releasing of the stretching fixation of the spring body.

S2, penetrating a first anti-unwinding wire 300 and a second anti-unwinding wire 400 with the length larger than the straightened length of the spring body into a channel formed by the spring body to ensure that the first anti-unwinding wire 300 and the second anti-unwinding wire 400 are in a vertical parallel and fixed state, and forming a second binding space between the first anti-unwinding wire 300 and the second anti-unwinding wire 400; this step may be achieved by means of a movable clamping device (not shown in the figures).

And S3, passing the double-stranded closed-loop fiber wire 200 through the second binding space, and keeping the middle part of the fiber wire 200 between the first anti-unwinding wire 300 and the second anti-unwinding wire 400, wherein the fiber wire 200 is provided with a first part 210 positioned on one side of the first anti-unwinding wire 300 and the second anti-unwinding wire 400 and a second part 220 positioned on the other side of the first anti-unwinding wire 300 and the second anti-unwinding wire 400.

And S4, translating the first anti-unwinding yarns 300 or the second anti-unwinding yarns 400, enabling the first anti-unwinding yarns 300 and the second anti-unwinding yarns 400 to be attached side by side, and clamping the fiber wires 200 to form the state shown in the attached drawing 2.

And S5, fixedly connecting one end of the first anti-unscrewing wire 300 and one end of the second anti-unscrewing wire 400 with the fixed end head 120 of the spring body, wherein the specific fixed connection mode is given in the following.

S6, the first part 210 is arranged and wound on the first anti-unwinding wire 300 and/or the second anti-unwinding wire 400 along a first circumferential direction, and the second part 220 is arranged and wound on the second anti-unwinding wire 400 and/or the first anti-unwinding wire 300 along a second circumferential direction, wherein the first circumferential direction is the same as or opposite to the second circumferential direction. The winding process can be realized by a micro-mechanical arm.

There are various winding methods for this step, for example, as shown in fig. 3, the first part 210 is wound up to the first anti-unwinding wire 300 of about half of the circumference, and the second part 220 is wound down to the second anti-unwinding wire 400 of about half of the circumference, but it is also possible to wind the first part 210 down, so that the first part 210 is wound up to the second anti-unwinding wire 400 of about half of the circumference, and wind the second part 220 up, so that the second part 220 is wound up to the first anti-unwinding wire 300 of half of the circumference, as shown in fig. 4.

Of course, in order to improve the stability of the fiber line 200 after winding, as shown in fig. 5, the first part 210 may be wound upward and then wound downward about half a turn with the second anti-unwinding yarn 400, the second part 220 may be wound downward and then wound upward about half a turn with the first anti-unwinding yarn 300, and so on.

S7, releasing the tension of the spring body, and clamping the first part 210 and the second part 220 by two adjacent circles of spring wires to form the state in the figure 6.

And S8, cutting redundant first anti-unwinding yarns 300 and second anti-unwinding yarns 400, and fixedly connecting the other ends of the first anti-unwinding yarns 300 and the second anti-unwinding yarns 400.

Adopt foretell processing step to the cellosilk, when playing to prevent the spring coil from untwisting through the anti unwinder silk of bifilar, utilize the anti unwinder silk of bifilar to carry out the preliminary fixed of cellosilk 200, the integrative multipurpose of first anti unwinder silk 300 and the anti unwinder silk 400 of second has been realized, then carry out final fixed through the spring silk after twining with cellosilk 200 again, need not to knot to cellosilk 200 and handle, compare in traditional ligature mode convenient operation not only, it is fixed effectual, the problem that cellosilk 200 drops and increases the spring body external diameter can not appear, and the both sides of cellosilk 200 all are located the spring body and beat the lock and handle outward, also can further improve the embolism effect.

In addition, in order to further improve the embolization effect, the step of binding the fiber thread 200 to the first anti-unwinding filaments 300 and the second anti-unwinding filaments 400 further includes: s9, performing the lock making treatment on the first part 210 and the second part 220, and dividing both the first part 210 and the second part 220 into a plurality of fiber yarns. The lock beating device (not shown in the figures) may include a plurality of micro scrapers arranged side by side at intervals and a driving structure for driving the micro scrapers to act, a single fiber thread 200 may form a plurality of fiber filaments after the lock beating, and the number of the fiber filaments is determined according to the number of the micro scrapers and the number of the actions.

Optionally, the fiber thread 200 of the present embodiment may be a double-strand closed-loop structure, and thus, the fiber thread 200 is designed as a closed-loop double-strand structure, which can further increase the number of the fiber filaments of the fiber thread 200 after being tressed, and further improve the embolization effect.

Alternatively, the present embodiment provides for the first portion 210 of the filament to have a length greater than the length of the second portion 220, with the first portion 210 being outside the coil and the second portion 220 being at least partially within the coil after the body has been wrapped to form the coil. In this way, the length of the first portion 210 is designed to be greater than the length of the second portion 220, so as to avoid mutual interference when the two portions are wound by a micro-mechanical arm or the like, and the longer first portion 210 is arranged outside the coil ring to achieve a good embolization effect, and the shorter second portion 220 is arranged inside the coil ring, so that the embolization is assisted and the waste of the fiber filaments can be reduced.

In addition, a first clamping plane 301 may be disposed on a side of the first anti-unscrewing wire 300 facing the second anti-unscrewing wire 400, a second clamping plane 401 may be disposed on a side of the second anti-unscrewing wire 400 facing the first anti-unscrewing wire 300, the fiber thread 200 is clamped between the first clamping plane 301 and the second clamping plane 401, and a clamping force on the fiber thread 200 can be improved by cooperation of the first clamping plane 301 and the second clamping plane 401, so that the fiber thread 200 is prevented from being disengaged from the spring ring.

Optionally, friction particles (not shown in the drawings) may be disposed on the first clamping plane 301 and the second clamping plane 401 of this embodiment, and the friction force between the first clamping plane 301 and the second clamping plane 401 and the fiber line 200 is increased by the friction particles, so as to further improve the stability of the fiber line 200 after being fixed.

With reference to fig. 8, in order to facilitate the first anti-unscrewing wire 300 and the second anti-unscrewing wire 400 to form a first binding space relatively fixed in step S2 and facilitate one of the first anti-unscrewing wire 300 and the second anti-unscrewing wire 400 to move to form a fitting state, the present embodiment further improves the structure of the fixing end 120, a first fixing hole 121, a second fixing hole 122 and a third fixing hole 123 are disposed on one side of the fixing end 120 facing the first anti-unscrewing wire 300 and the second anti-unscrewing wire 400, the first fixing hole 121 and the second fixing hole 122 are disposed at an interval, the third fixing hole 123 is located between the first fixing hole 121 and the second fixing hole 122 and adjacent to the first fixing hole 121, and a clamping groove 124 is disposed between the third fixing hole 123 and the second fixing hole 122.

One end of the first anti-unscrewing wire 300 of the embodiment is inserted into the first fixing hole 121, and is tightly fitted with the first fixing hole 121; along the direction departing from the fixing end 120, the second anti-rotation wire 400 sequentially comprises a first inserting portion 410, a breaking body 420, a connecting band 430 and a second inserting portion 440, one end of the first inserting portion 410 is configured to be capable of being inserted into the second fixing hole 122 and tightly matched with the second fixing hole, the other end of the first inserting portion 410 is connected with one end of the second inserting portion 440 through the breaking body 420, the breaking body 420 is configured to be capable of being disconnected from the first inserting portion 410 and the second inserting portion 440 under the action of an external force, the length of the breaking body 420 is equal to that of the clamping groove 124 and can be clamped in the clamping groove 124, and the connecting band 430 is respectively connected with the first inserting portion 410, the breaking body 420 and the second inserting portion 440.

Wherein the second anti-unscrewing wire 400 is connected to the fixed end head 120 in the following manner: in step S2, one end of the second anti-unwinding wire 400 is inserted into the second fixing hole 122; in step S4, the breaking body 420 of this embodiment is broken, such that one end of the breaking body 420 is disconnected from the first inserting portion 410, the other end of the breaking body 420 is connected to the second inserting portion 440, and the breaking body 420 is disposed in the clamping groove 124; the second inserting portion 440 is inserted into the third fixing hole 123.

Above-mentioned structural design utilizes first fixed orifices 121 and second fixed orifices 122 to be convenient for first anti unwinding silk 300 and the preliminary fixed of the anti unwinding silk 400 of second, and then do benefit to passing of fibre line 200, and through the design of fracture body 420 and connecting band 430, be convenient for fix the anti unwinding silk 400 translation of second to third fixed orifices 123, make first anti unwinding silk 300 and the anti unwinding silk 400 of second laminate centre gripping fibre line 200 side by side, and is ingenious in structure, and the operation is simple.

Optionally, the connection band 430 of the present embodiment is made of the same material as the second anti-unscrewing wire 400, for example, an alloy or a polymer material, and is connected to the first inserting portion 410, the breaking body 420, and the second inserting portion 440 in a hot-melting manner, so as to further improve the structural stability of the second anti-unscrewing wire 400.

With reference to fig. 9 and fig. 10, based on the above-mentioned coil structure, the present invention further provides a blood flow blocking coil release system, which includes a catheter mechanism 500, a delivery mechanism 600, a release mechanism 700, and the above-mentioned blood flow blocking coil, wherein at least a portion of the delivery mechanism 600, the release mechanism 700, and the blood flow blocking coil are located in the catheter mechanism 500, and the distal end of the delivery mechanism 600 is connected to the blood flow blocking coil through the release mechanism 700; also, the release mechanism 700 of the present embodiment is configured to: the proximal release mechanism 700 of the delivery mechanism 600 is actuated to disengage the blood flow occlusion coil from the delivery mechanism 600.

The blood flow of this embodiment blocks and improves with spring coil release system to the ligature structure of fibre line 200 on the spring coil, fibre line 200 is tentatively fixed through the two-strand anti-unwinding silk, then elasticity through the spring body is fixed the centre gripping to the both sides of fibre line 200, need not to tie a knot to fibre line 200 and handle, compare in traditional ligature mode convenient operation not only, it is fixed effectual, the problem that fibre line 200 drops and increases the spring body external diameter can not appear, and the both sides of fibre line 200 all are located the spring body and outside and beat the lock and handle, also can further improve the embolism effect.

The releasing mechanism 700 of this embodiment has various structural forms, for example, it can adopt the existing double "S" bending mechanical releasing structure (not shown in the figure), and the structure is divided into the implant S bending and the conveying system S bending after being integrally cut and formed, the implant S bending is connected with the spring ring, the conveying system S bending is connected with the conveying mechanism 600, the implant S bending and the conveying system S bending are connected by inserting the releasing wire in the middle of the conveying mechanism 600; when the spring ring needs to be released, the proximal part of the conveying mechanism 600 is broken off, then the release wire is stretched from the proximal end, the S-bend of the implant is separated from the S-bend of the conveying system, the length of the release area is less than 2mm, the influence on the head end of the catheter in the conveying process is reduced, and the phenomenon of tube kicking after release is avoided; specifically, the near end of the release wire is connected with a release pipe, and the release pipe is welded with the conveying system in a dotted manner; when the release wire needs to be released, the point-shaped welding point is broken, the release pipe is pulled backwards, and the release wire correspondingly moves backwards to realize the release; does not need any accessories such as a handle, a power supply and the like, and is simple and quick. In addition, the hardness in the area is also reduced by selecting the material and the inner and outer diameters of the S-shaped bend; the short disengagement zone can further reduce the probability of disengagement failure and improve stability.

The connection of the release wire and the release pipe can be realized in the following modes: A. welding; inserting the release wire into a release pipe, adhering the release wire to the wall by using a mandrel, and performing laser welding on the outer surface of the release pipe to connect the release wire and the release pipe together; the laser welding can be continuous welding or spot welding, so that the connection strength is realized; B. pressing and holding: inserting the release thread into the release tube, and pressing and holding the release tube by using a pressing and holding tool or equipment to connect the release thread and the release tube together; the press-holding can be continuous or punctiform, so that the connection strength is realized; C. bonding: and inserting the release wire into the release pipe, and injecting glue into the release pipe to realize connection.

The connection of the release tube and the delivery system can be spot welding, such as 180-degree interval (2 points), 120-degree interval (3 points) and 90-degree interval (4 points), so that the balance of connection strength and breaking force is realized; the device can avoid accidental breakage and accidental release before use, can ensure that the breaking force required during breakage is not too large, meets the use requirement, reduces the operation difficulty and reduces the operation time.

The inventor finds that the conventional release mechanism 700 generally has two release portions connected by a release line, the release line needs to pass through the delivery pipe of the delivery mechanism 600, and a break line is arranged on the delivery pipe, when the spring ring needs to be released, the break line of the delivery pipe needs to be manually broken by a medical worker, and then the pull release line is used for releasing the embedded connection of the two release portions, which not only is tedious in operation, but also needs to make more structural improvements on the delivery pipe of the delivery mechanism 600, and in addition, in the process of pulling the release line, the problems of release failure, dead release line clamp and fracture easily occur, so the embodiment also provides a new spring ring release mechanism 700.

Unlike the conventional release structure, the release mechanism 700 of the present embodiment includes a guide sleeve 710, a first release member 720, and a second release member 730; the guide sleeve 710 is arranged in the catheter mechanism 500, the outer diameter of the guide sleeve 710 is smaller than the inner diameter of the catheter mechanism 500, a first limiting part 711 is arranged on the outer wall of the far end of the guide sleeve 710, and a second limiting part 510 which can be in limiting fit with the first limiting part 711 is arranged on the inner wall of the far end of the catheter mechanism 500; the first releasing member 720 and the second releasing member 730 are slidably mounted in the guide sleeve 710, one end of the first releasing member 720 is connected to the conveying mechanism 600, the other end of the first releasing member 720 is provided with a shape memory alloy part 721, one end of the second releasing member 730 is provided with a slot 731 in plug-in fit with the shape memory alloy part 721, a side wall of the slot 731 is provided with a limiting groove, the limiting groove is internally provided with a space for bending and deforming the shape memory alloy part 721, as shown in fig. 9, the shape memory alloy part 721 is configured to at least partially extend into the limiting groove at a first temperature, as shown in fig. 10, the shape memory alloy part 721 is released from the limiting groove at a second temperature, the first temperature is lower than the second temperature, for example, the first temperature is 0-20 ℃, and the second temperature is 30-40 ℃.

The release mechanism 700 of this embodiment need not medical personnel and carries out operations such as rupture, act as go-between and release the processing when releasing the spring coil, directly places the spring coil in blood certain time can automatic untwist, has alleviateed medical personnel's operation, improves and knows and takes off efficiency and degree of accuracy.

Referring to fig. 11, the conveying mechanism 600 of this embodiment includes a conveying pipe connected to the releasing mechanism 700, the conveying pipe has spiral grooves 610 along its length direction, and from the near end to the far end of the conveying pipe, the distance between two adjacent spiral grooves 610 is gradually reduced, the spiral grooves 610 are used to facilitate the bending conveying of the conveying pipe, and the design of gradually changing the distance is adopted, so that the conveying pipe is gradually flexible from the near end to the far end, the conveying performance is enhanced, and the influence on the tip of the catheter is reduced.

Specifically, the conveying pipe of the conveying mechanism 600 of the embodiment is cut in a far-end "spiral, interrupted, gradual change" manner, the cutting width is 0.01mm to 2mm, the screw pitch of the spiral is 0.1mm to 10mm, and the cutting ratio is changed step by 180 degrees (cutting area): 45 deg. (uncut area) and is graduated (note: the interruption ratio means that after cutting 180 deg. according to the defined cutting width and pitch, cutting is stopped at 45 deg., cutting is again stopped at 180 deg., the cycle is repeated, etc.).

The structure design has the following advantages: A. gradual cutting is performed, so that perfect combination of near-end support and far-end compliance is realized; B. the stable change of the hardness is realized by gradually increasing the screw pitch, and the transmission of the pushing force is enhanced; C. the flexible design of the far end enhances the conveying performance and reduces the influence on the tip of the catheter; D. intermittent cutting is performed, the anti-ovalization performance is enhanced, the phenomenon that a part of area is too soft after being excessively cut is avoided, the untwisted extruded untwisted wires are used, the resistance of untwisting and pulling out is increased, and the failure conditions that the instrument cannot be untwisted and the like are possibly caused.

In addition, the blood flow blocking spring ring release system of the embodiment is further provided with a marking ring (not shown in the figure), when the first spring ring is implanted, the developing performance of the spring ring can block the development of the tip of the catheter; therefore, the conventional spring ring catheters are provided with 2 marking rings at the interval of 3cm; therefore, the product needs to be provided with a developing mark at the position 3cm away from the spring ring, and when the mark is aligned with the mark at the proximal end of the catheter, the product starts to be disengaged; the assembly accuracy requirement of the marking ring is very high; therefore, in the embodiment, the marking ring is newly designed, the marking ring is installed on the release wire, and the marking ring is fixed at a required position by using methods such as welding, swaging, bonding and the like; the marker rings may be wound wires, tubing or C-tubes; in the traditional design, the mark is placed on the outer surface of the conveying system, so that the outer diameter is increased, and the conveying resistance is increased; on the other hand, the two ends of the marking ring are provided with steps which are easy to clamp at the position of a catheter tube seat, in a tortuous blood vessel and the like; the new design completely avoids this problem; in addition, in the traditional design, in order to reduce the outer diameter, the wall thickness of the marking ring needs to be reduced, and the difficulty in connection is increased; the novel design of the embodiment fixes the marking ring on the release wire, the process is simple and easy to operate, and when the release wire needs to be released, the release wire is pulled by the near end to release the implant; at the moment, the marking ring on the release wire can move a certain distance towards the proximal end and deviate from the marking ring on the catheter, so that an indicating function is achieved, the implant is indicated to be completely released, and the operation of a doctor is facilitated.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims. In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

Claims (10)

1. The spring ring for blocking the blood flow comprises a spring ring body (100) and a fiber wire (200), wherein the spring ring body (100) is formed by winding a spring body (110) formed by spirally processing a spring wire, at least part of the fiber wire (200) is positioned in the spring ring body (100), and at least one end of the fiber wire extends out of the outer surface of the spring ring body (100);

the spring body (110) is internally provided with a first anti-unscrewing wire (300) and a second anti-unscrewing wire (400) which are attached side by side in a penetrating manner, and the fiber wire (200) is bound on the first anti-unscrewing wire (300) and the second anti-unscrewing wire (400) in the following manner:

s1, straightening a spring body (110) before the spring body (110) is wound and molded into a spring ring body (100), stretching at least part of the spring body (110) to a deformation state, and forming a plurality of first binding spaces by spring wires of the stretched spring body (110);

s2, penetrating a first anti-unscrewing wire (300) and a second anti-unscrewing wire (400) which are longer than the straightened spring body (110) into a channel formed by the spring body (110), ensuring that the first anti-unscrewing wire (300) and the second anti-unscrewing wire (400) are in a vertically parallel and fixed state, and forming a second binding space between the first anti-unscrewing wire (300) and the second anti-unscrewing wire (400);

s3, a double-stranded closed-loop type fiber wire (200) is passed through the second binding space, and the middle part of the fiber wire (200) is kept between the first anti-unscrewing-resistant wire (300) and the second anti-unscrewing-resistant wire (400), and the fiber wire (200) is provided with a first part (210) on one side of the first anti-unscrewing-resistant wire (300) and the second anti-unscrewing-resistant wire (400) and a second part (220) on the other side of the first anti-unscrewing-resistant wire (300) and the second anti-unscrewing-resistant wire (400);

s4, translating the first anti-unscrewing yarns (300) or the second anti-unscrewing yarns (400), enabling the first anti-unscrewing yarns (300) and the second anti-unscrewing yarns (400) to be attached side by side, and clamping the fiber wires (200);

s5, fixedly connecting one end of the first anti-unscrewing wire (300) and one end of the second anti-unscrewing wire (400) with a fixed end (120) of the spring body (110);

s6, overlapping and winding the first part (210) on the first anti-unscrewing wires (300) and/or the second anti-unscrewing wires (400) along a first circumferential direction, overlapping and winding the second part (220) on the second anti-unscrewing wires (400) and/or the first anti-unscrewing wires (300) along a second circumferential direction, wherein the first circumferential direction is the same as or opposite to the second circumferential direction;

s7, releasing the tension of the spring body (110), and clamping the first part (210) and the second part (220) by two adjacent turns of the spring wire;

s8, cutting redundant first anti-unscrewing yarns (300) and second anti-unscrewing yarns (400), and fixedly connecting the other ends of the first anti-unscrewing yarns (300) and the second anti-unscrewing yarns (400).

2. The blood flow blocking spring coil of claim 1, wherein the step of passing the fiber strand (200) over the first anti-unwinding wire (300) and the second anti-unwinding wire (400) further comprises:

s9, performing a lock making treatment on the first part (210) and the second part (220), and dividing the first part (210) and the second part (220) into a plurality of fiber filaments.

3. The occlusion coil of claim 1, wherein the first portion (210) has a length greater than the length of the second portion (220), the first portion (210) being disposed outside the coil and the second portion (220) being disposed at least partially within the coil after the coil is formed by winding the body (110).

4. A blood flow blocking spring coil as set forth in claim 1, wherein a side of the first anti-unscrewing wire (300) facing the second anti-unscrewing wire (400) is provided with a first clamping plane (301), a side of the second anti-unscrewing wire (400) facing the first anti-unscrewing wire (300) is provided with a second clamping plane (401), and the fiber wire (200) is clamped between the first clamping plane (301) and the second clamping plane (401).

5. A blood flow occlusion coil as claimed in claim 4, characterised in that the first clamping plane (301) and/or the second clamping plane (401) is provided with friction particles.

6. A blood flow blocking coil as claimed in claim 1, wherein the side of the fixing end (120) facing the first anti-unscrewing wire (300) and the second anti-unscrewing wire (400) is provided with a first fixing hole (121), a second fixing hole (122) and a third fixing hole (123), the first fixing hole (121) and the second fixing hole (122) are arranged at intervals, the third fixing hole (123) is located between the first fixing hole (121) and the second fixing hole (122) and adjacent to the first fixing hole (121), and a clamping groove (124) is arranged between the third fixing hole (123) and the second fixing hole (122);

one end of the first anti-unscrewing wire (300) is inserted into the first fixing hole (121) and is tightly matched with the first fixing hole (121);

along the direction departing from the fixing end head (120), the second anti-unscrewing wire (400) sequentially comprises a first inserting portion (410), a breaking body (420), a connecting band (430) and a second inserting portion (440), one end of the first inserting portion (410) is configured to be capable of being inserted into the second fixing hole (122) and tightly matched with the second fixing hole, the other end of the first inserting portion (410) is connected with one end of the second inserting portion (440) through the breaking body (420), the breaking body (420) is configured to be capable of being disconnected from the first inserting portion (410) and the second inserting portion (440) under the action of external force, the length of the breaking body (420) is equal to that of the clamping groove (124) and capable of being clamped in the clamping groove (124), and the connecting band (430) is respectively connected with the first inserting portion (410), the breaking body (420) and the second inserting portion (440);

wherein the second anti-unwinding wire (400) is connected with the fixing tip (120) by:

inserting one end of the second anti-rotation wire (400) into the second fixing hole (122);

breaking the breaking body (420) to disconnect one end of the breaking body (420) from the first insertion part (410), disconnecting the other end of the breaking body (420) from the second insertion part (440), and placing the breaking body (420) in the clamping groove (124);

and inserting the second inserting part (440) into the third fixing hole (123).

7. The blood flow occlusion coil as set forth in claim 6, wherein said connecting band (430) is made of the same material as said second anti-unwinding wire (400), and is thermally fused to said first insertion portion (410), said breaking body (420) and said second insertion portion (440).

8. A blood flow occlusion coil release system comprising a catheter mechanism (500), a delivery mechanism (600), a release mechanism (700), and the blood flow occlusion coil of any of claims 1-7, at least some of the delivery mechanism (600), the release mechanism (700), and the blood flow occlusion coil being disposed within the catheter mechanism (500), the distal end of the delivery mechanism (600) being coupled to the blood flow occlusion coil via the release mechanism (700); wherein the release mechanism (700) is configured to: the release mechanism (700) is actuated to operate the proximal end of the delivery mechanism (600), and the blood flow occlusion coil is disengaged from the delivery mechanism (600).

9. The occlusion coil release system of claim 8, wherein the release mechanism (700) includes a guide sleeve (710), a first release member (720), and a second release member (730); the guide sleeve (710) is arranged in the catheter mechanism (500), the outer diameter of the guide sleeve (710) is smaller than the inner diameter of the catheter mechanism (500), a first limiting part (711) is arranged on the outer wall of the far end of the guide sleeve (710), and a second limiting part (510) which can be in limiting fit with the first limiting part (711) is arranged on the inner wall of the far end of the catheter mechanism (500); the first release piece (720) and the second release piece (730) are slidably mounted in the guide sleeve (710), one end of the first release piece (720) is connected with the conveying mechanism (600), the other end of the first release piece (720) is provided with a shape memory alloy part (721), one end of the second release piece (730) is provided with a slot (731) which is in plug-in fit with the shape memory alloy part (721), the side wall of the slot (731) is provided with a limiting groove, the limiting groove is internally provided with a space for bending deformation of the shape memory alloy part (721), the shape memory alloy part (721) is configured to at least partially extend into the limiting groove at a first temperature and separate from the limiting groove at a second temperature, and the first temperature is lower than the second temperature.

10. The blood flow occlusion coil release system of claim 8, wherein the delivery mechanism (600) comprises a delivery tube connected to the release mechanism (700), the delivery tube defining a spiral groove (610) along its length, the distance between two adjacent spiral grooves (610) decreasing from a proximal end to a distal end of the delivery tube.

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