CN113229871A

CN113229871A - Conveying steel cable and conveying system

Info

Publication number: CN113229871A
Application number: CN202110688495.1A
Authority: CN
Inventors: 阮成民; 沈斌; 粱玉麟; 李妙; 邓嘉铭
Original assignee: Guangdong Pulse Medical Technology Co ltd
Current assignee: Guangdong Pulse Medical Technology Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2021-08-10

Abstract

The invention relates to the technical field of medical instruments, in particular to a conveying steel cable and a conveying system. The conveying steel cable, the hand-held piece, the steel core and the positioning piece; the first end of the steel core is fixedly connected with the hand-holding piece, and the second end of the steel core is used for connecting an implantation instrument; the positioning piece is fixed outside the steel core and is positioned on one side of the hand-held piece close to the second end; when the positioning piece is positioned at the initial end of the delivery sheath, the positioning piece is used for indicating the implantation instrument to reach a set position.

Description

Conveying steel cable and conveying system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a conveying steel cable and a conveying system.

Background

Interventional therapy is an emerging therapeutic approach that is intermediate between surgical and medical therapies, including both intravascular and non-vascular interventions. After more than 30 years of development, the patient is called three-pillar department of surgery and medicine. In brief, the interventional therapy is a minimally invasive treatment method in which a small channel with a diameter of several millimeters is made on a blood vessel and a skin or an original pipeline of a human body under the guidance of an imaging device (an angiography machine, a fluoroscopy machine, a CT, an MR, a B-ultrasound) to treat a local part of a focus without operating to expose the focus.

The delivery system for interventional therapy mainly comprises a delivery sheath, a loader and a delivery steel cable. The conveying sheath tube is used for establishing an access channel of an implantation instrument; the loader is mainly used for facilitating a doctor to send an implantation instrument into the conveying sheath; the main function of the delivery cable is to release the implantation instrument to the site to be implanted by pushing it within the channel created by the delivery sheath. A steel cable for conveying the steel cable passes through the loader, an insertion device is fixed at the free end of the steel cable, and then the steel cable is pulled to enable the insertion device to be accommodated in the loader; the loader is then placed into the delivery sheath and the cable is then pushed to deliver the implantation instrument until the implantation instrument reaches the desired location for implantation.

Generally, as shown in fig. 1, the steel cable for conveying comprises a steel cable 01, a bolt head 02, a hand-held part 03 and a hand-held part screw 04, wherein the steel cable 01 is of a structure that an outer pipe is mostly spring and contains a steel core formed by winding a plurality of metal wires; the bolt head 02 is provided with external threads, the bolt head 02 is fixedly connected with one end of a steel cable, the other end of the steel cable is fastened in the hand-held piece 04 through a hand-held piece screw 03, corresponding internal threads matched with the external threads of the bolt head 02 are arranged on the embedded instrument, and the embedded instrument is fixedly connected with the bolt head 02 through threads. The problem that exists is that the steel cable of carrying need continuously to observe under DSA image when the implantation instrument of propelling movement in the conveying sheath pipe to prevent to carry the steel cable to unblock in advance and break away from with the implantation instrument when still not appointing to release the implantation instrument, art person and patient expose under ionizing radiation for a long time, and the received radiation dose is big.

Disclosure of Invention

The invention aims to provide a conveying steel cable and a conveying system, which solve the technical problem that the prior art has large radiation dose when an operator and a patient are exposed to ionizing radiation for a long time.

The invention provides a conveying steel cable, comprising: the handle, the steel core and the positioning piece; the first end of the steel core is fixedly connected with the hand-holding piece, and the second end of the steel core is used for connecting an implantation instrument; the positioning piece is fixed outside the steel core and is positioned on one side of the hand-held piece close to the second end; when the positioning piece is positioned at the initial end of the delivery sheath, the positioning piece is used for indicating the implantation instrument to reach a set position.

When the conveying steel cable conveying and implanting instrument provided by the invention is used for conveying and implanting the instrument, the conveying steel cable fixed with the implanting instrument and the loader sleeved outside the steel core are inserted into the conveying sheath; an operator (an operator) can judge whether the implantation instrument reaches a set position according to whether the positioning piece reaches the initial end of the delivery sheath (one end of the delivery steel cable entering the delivery sheath), for example, when the positioning piece reaches the initial end of the delivery sheath, the implantation instrument correspondingly reaches the set position, so that the operator can clearly know the position of the implantation instrument, the situation that the implantation instrument continuously observes under a DSA image before reaching the position can be avoided, the observation time under the DSA image can be reduced in the whole process of delivering the implantation instrument, the time of exposing the operator and a patient to ionizing radiation is further reduced, and the radiation dose is reduced.

Furthermore, the conveying steel cable further comprises a plurality of indicating positioning pieces, and the plurality of positioning pieces are arranged at intervals along the length direction of the steel core.

Further, a ready-to-release positioning member is included in the plurality of positioning members, and the release positioning member indicates that the implantation instrument reaches the end of the delivery sheath when reaching the beginning of the delivery sheath.

Furthermore, the positioning parts further include a half-release positioning part and a full-release positioning part, the half-release positioning part is located on one side of the positioning part to be released, which is close to the hand-held part, and the full-release positioning part is located on one side of the half-release positioning part, which is far away from the positioning part to be released.

Further, the positioning piece is a protrusion arranged outside the steel core.

Further, the conveying steel cable further comprises a rotating handle, a bolt head and a bolt sleeve, and the steel core comprises a pipe cavity and a lock cylinder; the lock cylinder penetrates through the pipe cavity; the bolt head is fixedly connected to one end of the tube cavity, and a notch is formed in the bolt head; the first end of the lock cylinder is fixedly connected with the rotary handle, and the second end of the lock cylinder penetrates through the tube cavity so as to be capable of penetrating through the notch to be in threaded connection with the part, far away from the tube cavity, of the bolt head; the fixed end of the bolt sleeve is fixedly connected to the bolt head, and the free end of the bolt sleeve can be sleeved on the lock cylinder at the notch; the hand-held piece is fixed at the position of the tube cavity close to the rotating handle.

Further, the conveying steel cable also comprises a connecting sleeve and a sliding block pointer; the connecting sleeve is fixedly connected with the lock cylinder, and the sliding block pointer is rotationally connected with the connecting sleeve; the hand-held piece is provided with a sliding groove, and the sliding block pointer is arranged in the sliding groove in a sliding manner;

and/or, the conveying cable further comprises a schematic plate; the indicating plate is fixed at one end of the hand-held piece close to the rotating handle, and the lock cylinder penetrates through the indicating plate; the surface of the indicating plate facing the rotating handle is provided with the rotating handle rotating identification.

The invention provides a conveying system, which comprises a conveying sheath, an expander, a loader and a conveying steel cable; the dilator can be inserted within the delivery sheath, the delivery cable can be inserted within the loader, and the loader can be inserted within the delivery sheath.

Further, the conveying system also comprises an auxiliary loader, the auxiliary loader comprises a connecting pipe section and a transition pipe section which are connected with each other, and one end of the connecting pipe section, which is far away from the transition pipe section, is detachably connected with the loader; the cross-sectional area of the transition pipe section is gradually increased from one end, close to the connecting pipe section, of the transition pipe section to one end, far away from the connecting pipe section, of the transition pipe section.

Furthermore, friction increasing structures are arranged on the outer wall of the connecting pipe section and the outer wall of the transition pipe section.

Furthermore, the auxiliary loader also comprises an intermediate pipe section, one end of the intermediate pipe section is connected with the connecting pipe section, and the other end of the intermediate pipe section is connected with the transition pipe section; the outer wall of the middle pipe section is arranged in an inward concave arc shape.

Further, the conveying sheath pipe comprises a sheath pipe seat and a sheath pipe body connected with the sheath pipe; the dilator comprises a dilator tube seat and a dilator tube body connected with the dilator tube seat; the dilator tube seat is clamped with the sheath tube seat.

It is to be understood that both the foregoing general description and the following detailed description are for purposes of illustration and description and are not necessarily restrictive of the disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of the disclosure. Together, the description and drawings serve to explain the principles of the disclosure.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a related art conveying wire rope;

FIG. 2 is a schematic diagram of a conveying cable according to an embodiment of the present invention;

figure 3 is a schematic view of the delivery cable of figure 2 in a stage in which the implantation instrument is ready to be released;

figure 4 is a schematic view of the delivery cable of figure 2 during a semi-release stage of the implantation device;

figure 5 is a schematic view of the delivery cable of figure 2 in a fully released stage of the implantation instrument;

figure 6 is a schematic view of the hand grip of the delivery cable of figure 2;

FIG. 7 is a schematic view of the construction of the slider finger and the schematic plate in the delivery cable shown in FIG. 2;

figure 8 is a schematic view of a plug in the delivery cable of figure 2;

figure 9 is another schematic view of the plug head of the delivery cable shown in figure 2;

FIG. 10 is a schematic view of a delivery sheath of the delivery system of the present invention;

FIG. 11 is a schematic view of a dilator in the delivery system in an embodiment of the present invention;

FIG. 12 is a schematic view of the structure of the loader in the transport system according to the embodiment of the present invention;

FIG. 13 is a schematic view of the construction of an auxiliary loader in the conveying system according to the embodiment of the present invention;

FIG. 14 is a cut-away view of the auxiliary loader shown in FIG. 13;

FIG. 15 is a schematic diagram of the structure of an auxiliary loader and a loader in the conveying system in an embodiment of the invention.

Icon: 100-a delivery sheath; 101-sheath tube seat; 102-a sheath tube body; 103-sheath three-way valve; 104-sheath extension tube; 200-a dilator; 201-dilator tube seat; 202-dilator tube; 300-a loader; 301-loader tube base; 302-loader tube; 303-loader three-way valve; 304-a loader extension tube; 400-conveying wire rope; 401-rotating the handle; 402-a lumen; 403-a lock cylinder; 404-bolt head; 405-a plug bush; 406-a hand grip; 407-anti-slip; 408-a connecting sleeve; 409-slider pointer; 410-schematic board; 411-notch; 412-ready to release the retainer; 413-semi-releasing location; 414-full release retainer; 500-an auxiliary loader; 501-connecting pipe sections; 502-a transition duct section; 503-middle tube section; 600-implanting the apparatus.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 2 to 15, the present invention provides a delivery wireline 400, comprising: a hand grip 406, a steel core and a positioning element; the first end of the steel core is fixedly connected with the hand-holding piece 406, and the second end of the steel core is used for connecting the implantation instrument 600; the positioning piece is fixed outside the steel core and is positioned on one side of the hand-held piece 406 close to the second end; when the positioning member is located at the beginning of the delivery sheath 100, it is used to indicate that the implantation instrument 600 reaches a set position.

When the delivery steel cable 400 provided by the embodiment is used for delivering the implantation instrument, the delivery steel cable 400 fixed with the implantation instrument 600 and the loader 300 sleeved outside the steel core are inserted into the delivery sheath 100; an operator (performing operator) can judge whether the implantation device 600 reaches a set position according to whether the positioning member reaches the beginning of the delivery sheath 100 (the end of the delivery cable 400 entering the delivery sheath 100), for example, when the positioning member reaches the beginning of the delivery sheath 100, the implantation device 600 correspondingly reaches a set position, so that the operator can clearly know the position of the implantation device, and can avoid continuously observing under the DSA image before the implantation device 600 reaches the position, thereby reducing the time of observing under the DSA image in the whole process of delivering the implantation device 600, further reducing the time of exposing the operator and the patient to ionizing radiation, and reducing the radiation dose.

Wherein, the positioning element 412 can be set to be ready to be released, when the positioning element is set to reach the beginning of the delivery sheath 100, the implantation device 600 is indicated to reach the end of the delivery sheath 100, that is, before the implantation device 600 reaches the designated implantation position, the position capable of being released is set, at this moment, the implantation device 600 is directly released outside the end of the delivery sheath 100 (the designated implantation position), and then in the whole delivery process of the implantation device 600, the observation under DSA image can be avoided, the exposure of the operator and the patient under ionizing radiation is avoided, and the protection is provided for the health of the operator and the patient.

On the basis of the above embodiment, further, the conveying steel cable 400 further includes a plurality of indicating positioning members, and the plurality of positioning members are arranged at intervals along the length direction of the steel core. In this embodiment, the plurality of positioning elements correspond to the setting positions of the plurality of implanting devices 600, the plurality of positioning elements are arranged in one-to-one correspondence with the plurality of setting positions, when a certain positioning element reaches the beginning of the delivery sheath 100, the implanting device 600 reaches a corresponding certain setting position, and as the steel cable continues to advance (moves in a direction close to the end of the delivery sheath 100), the next positioning element reaches the beginning of the delivery sheath 100, and the implanting device 600 reaches the next setting position; can make the position of the implantation instrument 600 known by the operator more carefully, more accurately and more conveniently.

When there are multiple locators, one locator may be provided in preparation for releasing the locator 412.

As shown in fig. 1 to 4, based on the above embodiments, further, the positioning members further include a half-release positioning member 413 and a full-release positioning member 414, the half-release positioning member 413 is located on a side of the positioning member 412 close to the hand-held member 406, and the full-release positioning member 414 is located on a side of the half-release positioning member 413 away from the positioning member 412, that is, along a direction of the steel core close to the hand-held member 406 and away from the hand-held member 406, the full-release positioning member 414, the half-release positioning member 413 and the full-release positioning member 414 are sequentially spaced apart, an end of the steel core away from the hand-held member 406 first penetrates into the delivery sheath 100, the positioning member 412 to be released first reaches a beginning end of the delivery sheath 100, and at this time, the implantation instrument 600 reaches a tail end of the delivery sheath 100 and is ready to be released; the steel core continues to advance, pushing the implantation instrument 600 to advance, and the half-release positioning element 413 reaches the beginning of the delivery sheath 100 second, at this time, the implantation instrument 600 releases half at the designated release position, and the other half is still positioned in the delivery sheath 100; the steel core continues to advance, pushing the implantation instrument 600 to advance, when the complete release positioning member 414 reaches the beginning of the delivery sheath 100, the implantation instrument 600 is completely released at the designated release position, at this time, the connection between the steel core and the implantation instrument 600 can be released, and the delivery system is withdrawn from the body. The delivery wire cable 400 provided by this embodiment not only enables the surgeon to know the position of the implantation device 600, but also enables the surgeon to know the release state of the implantation device 600, and the implantation device 600 can be made of degradable material (the degradable material is not developed on the ray detection).

On the basis of any of the above embodiments, further, the structural form of the positioning element may be various, for example: the positioning piece is an indication strip adhered outside the steel core, and the indication strip can be a light reflection strip; or the indication strip is a paster of red, blue, green, etc.; or the indication strip is made of plastic products and the like which can visually arouse the mind of the operator.

As an alternative, the positioning element is a protrusion arranged outside the steel core. In this embodiment, the locating piece is protruding, so that the operator can not only see the locating piece, but also touch the locating piece, and can obtain the position of the locating piece according to hand perception, thereby being more convenient to use.

Wherein, the protrusion can be a convex block, and the convex block is fixed outside the steel core through welding or adhesive bonding and other modes. Optionally, the protrusion is a lantern ring, the lantern ring is sleeved and fixed outside the steel core, and the lantern ring can be arranged in a spherical structure, a circular truncated cone structure, a cylindrical structure or a cubic structure.

As shown in fig. 2 to 9, based on any of the above embodiments, further, the steel delivery cable 400 further includes a rotation handle 401, a bolt head 404 and a bolt sleeve 405, and the steel core includes a tube cavity 402 and a lock cylinder 403; the lock cylinder 403 is arranged in the tube cavity 402 in a penetrating way; the bolt head 404 is fixedly connected to one end of the tube cavity 402, and a gap 411 is arranged on the bolt head 404; a first end of the lock cylinder 403 is fixedly connected with the rotary handle 401, and a second end of the lock cylinder 403 passes through the lumen 402 so as to be capable of passing through the gap 411 to be in threaded connection with a part of the bolt head 404 far away from the lumen 402; the fixed end of the bolt sleeve 405 is fixedly connected to the bolt head 404, and the free end of the bolt sleeve 405 can be sleeved on the lock core 403 at the notch 411; hand grip 406 is secured to lumen 402 at a location proximal to rotatable handle 401.

In this embodiment, the notch 411 divides the head 404 into two portions, one proximal and the other distal. With the delivery cable 400 in the open position: the first end of the lock cylinder 403 passes through the proximal lumen side of the bolt head 404 (it is understood that the proximal lumen side of the bolt head 404 is provided with a through hole through which the lock cylinder 403 can pass) and is disengaged from the distal lumen side of the bolt head 404, and the free end of the bolt sleeve 405 is disengaged from the second end of the lock cylinder 403. When the delivery wire rope 400 is in the locked state: the first end of the lock core 403 passes through the proximal lumen side of the bolt head 404, passes through the free end of the bolt sleeve 405, passes through the notch 411, and then is screwed on the distal lumen side of the bolt head 404 (it is understood that the second end of the lock core 403 is screwed with the distal lumen side of the bolt head 404, the second end of the lock core 403 is provided with external threads, and the wall of the distal lumen side of the bolt head 404 facing the notch 411 is provided with threaded holes).

Before the implantation instrument 600 is conveyed by using the conveying steel cable 400 provided by the embodiment, firstly, when the conveying steel cable 400 is in an open state, the free end of the bolt sleeve 405 is connected in series with the implantation instrument 600, then, the free end of the bolt sleeve 405 is placed at the notch 411 of the bolt head 404, then, the rotating handle 401 is rotated and pushed, the rotating handle 401 drives the second end of the lock cylinder 403 to move towards the direction close to the far lumen side of the bolt head 404, in the movement process of the lock cylinder 403, the second end of the lock cylinder 403 passes through the free end of the bolt sleeve 405 and is finally screwed into the far lumen side of the bolt head 404, at this moment, the conveying steel cable 400 is in a locking state, the implantation instrument 600 is fixed on the conveying steel cable 400, and then, the implantation instrument 600 is conveyed; when the implantation instrument 600 is conveyed to a designated implantation position, the rotating handle 401 is rotated reversely, the rotating handle 401 drives the lock cylinder 403 to retreat, the second end of the lock cylinder 403 is separated from the far lumen side of the bolt head 404, namely the conveying steel cable 400 is opened, the free end of the bolt sleeve 405 is separated from the second end of the lock cylinder 403, the conveying steel cable 400 is pulled to retreat, so that the bolt sleeve 405 is driven to retreat, the bolt sleeve 405 is separated from the implantation instrument 600, the conveying steel cable 400 is pulled out of the body, and implantation of the implantation instrument 600 is completed.

The delivery steel cable 400 provided by the embodiment is connected with the implantation instrument 600 through the embolus 405, the embolus 405 is connected through the implantation instrument 600, the appearance of the implantation instrument 600 is general or provided with a latticed sheath, the embolus 405 passes through the latticed structure, and after the implantation instrument 600 reaches the implantation position, the embolus 405 can exit the body along with the delivery steel cable 400 to avoid remaining on the implantation instrument 600; the connecting structures such as nuts and the like are avoided being arranged on the implantation instrument 600, so that on one hand, the connecting piece made of degradable materials is avoided being added to the implantation instrument 600, and the medical cost is avoided being increased; on the other hand, secondary processing on the implantation instrument 600 is avoided, so that the processing cost is reduced, and the medical cost is further reduced.

The lumen 402 may be a hollow structural member woven by metal; the lock cylinder 403 may be wound from a wire. The first end of the lock core 403 may be connected by welding or adhesive bonding. The lumen 402 may be fixed to the proximal lumen side of the plug 404 by welding or adhesive bonding.

The shape of the notch 411 in the head 404 may be various, for example: the longitudinal section of the notch 411 may be triangular, quadrangular or arc-shaped.

The material of the plug sheath 405 may be a metal wire or a polymer wire. The plug sleeve 405 may be fixed to the plug head 404 by welding, adhesive bonding, or binding.

The fixed end of the hub 405 may be positioned at any location on the hub 404 as desired, for example, the fixed end of the hub 405 is fixed to the proximal lumen side of the hub 405.

Alternatively, as shown in fig. 5 and 6, a plug sheath 405 is secured to the end of the plug head 404 distal to the lumen 402. In this embodiment, the fixed end of the plug 405 is disposed at the end of the plug 404 far from the lumen 402, so as to be closer to the implantation instrument 600, thereby avoiding interference between the plug 404 and the implantation instrument 600, and facilitating use.

As shown in fig. 6 and 7, based on the above embodiment, further, the conveying cable 400 further includes a hand grip 406, and the hand grip 406 is fixed on the lumen 402 near the rotating handle 401. In this embodiment, a hand grip 406 is disposed on the lumen 402 for easy handling by the user, thereby facilitating the user to rotate the rotatable handle 401.

Wherein the cross-section of the hand grip 406 may be circular, oval, triangular, quadrilateral, pentagonal, etc.

As shown in fig. 6 and 7, on the basis of the above embodiment, further, the outer wall of the hand-holding member 406 is provided with a slip-preventing member 407, and the slip-preventing member 407 can increase the friction between the user and the hand-holding member 406, so as to prevent the hand-holding member 406 from falling off due to a small friction between the hand and the hand-holding member 406. The anti-slip member 407 may be a plurality of protrusions disposed on the hand grip 406, a plurality of grooves disposed on the hand grip 406, or the like.

As shown in fig. 7 and 8, based on the above embodiment, further, the conveying cable 400 further includes a connection sleeve 408 and a slider pointer 409; the connecting sleeve 408 is fixedly connected with the lock cylinder 403, and the sliding block pointer 409 is rotatably connected with the connecting sleeve 408; the hand-held piece 406 is provided with a sliding groove, and the sliding block pointer 409 is arranged in the sliding groove in a sliding manner. In this embodiment, the connection sleeve 408 is sleeved and fixed outside the lock core 403, an annular groove may be formed on an outer wall of the connection sleeve 408, and one end of the slider pointer 409 is annular and is installed in the annular groove, so that the slider pointer 409 can rotate relative to the connection sleeve 408, and the other end of the slider pointer 409 slides in a sliding groove of the hand-held piece 406; the connecting sleeve 408 moves along with the lock cylinder 403, the slider pointer 409 moves linearly along with the connecting sleeve 408, the length of the sliding groove can be set according to the distance from the opening state to the locking state of the lock cylinder 403, the 'opening' and 'locking' marks are respectively arranged at the two ends of the sliding groove, when the slider pointer 409 is located at the 'opening' position, the conveying steel cable 400 is in the opening state, and when the slider pointer 409 is located at the 'locking' position, the conveying steel cable 400 is in the locking state, so that the use is convenient.

It should be noted that at least the hand grip 406 is provided with a slot opposite the lock cylinder 403, so that the connection sleeve 408 can be connected to both the lock cylinder 403 and the slider pointer 409.

As shown in fig. 8, in addition to any of the above embodiments, further, the conveying cable 400 further includes a schematic plate 410; a schematic plate 410 is fixed at one end of the hand grip 406 near the rotary handle 401, and the key cylinder 403 passes through the schematic plate 410; the surface of the indicating plate 410 facing the rotating handle 401 is provided with a rotating mark of the rotating handle 401. In this embodiment, a rotation direction arrow may be provided on the surface of the indicating plate 410 facing the rotary handle 401, so that the user can understand which direction to rotate the rotary handle 401, representing the advance of the lock cylinder 403 (movement in the direction toward the distal lumen side of the plug head 404), for example: the clockwise arrow indicates that lock cylinder 403 is advanced and the counterclockwise arrow indicates that lock cylinder 403 is retracted. Is convenient to use.

The present invention further provides a delivery system, which comprises the delivery sheath 100, the dilator 200, the loader 300 and the delivery cable 400 according to any of the above technical solutions, so that all the beneficial technical effects of the delivery cable 400 are achieved, and the details are not repeated herein. The dilator 200 can be inserted within the delivery sheath 100, the delivery cable 400 can be inserted within the loader 300, and the loader 300 can be inserted within the delivery sheath 100.

Specifically, as shown in fig. 10, the conveying sheath 100 includes a sheath tube base 101, a sheath tube body 102, a sheath tube three-way valve 103, and a sheath extension tube 104. The sheath pipe body 102 and the sheath pipe extension pipe are both connected with the sheath pipe seat 101, and one end of the sheath pipe extension pipe, which is far away from the sheath pipe seat 101, is connected with the sheath pipe three-way valve 103; the front end of the joint of the sheath tube base 101 and the sheath tube body 102 is wrapped with a spiral structure to protect the connection between the two; during the operation, the loader 300, the delivery cable 400 and the dilator 200 are fed into the sheath tube 102 from the sheath tube seat 101. One end of the sheath tube body 102 far away from the sheath tube base 101 is provided with a single-bent structure; the sheath three-way valve 103 has two outward injection inlets. The operator can evacuate the delivery sheath 100, heparinize the sheath, and perform intra-operative intracardiac imaging through the sheath three-way valve 103.

As shown in fig. 11, the dilator 200 includes a dilator tube seat 201 and a dilator tube 202 connected to the dilator tube seat 201, one end of the dilator tube 202 far from the dilator tube seat 201 is provided with a single-bending structure similar to the sheath tube 102, except that the end of the single-bending structure of the dilator tube 202 is an angled tip, but after the dilator tube 202 passes through the sheath tube 102, the dilator tube 202 can expand and support the sheath tube 102, the tip of the dilator tube 202 reduces resistance when passing through some narrow parts, so that the sheath 100 can be conveniently conveyed to reach the implantation position, and the inside of the dilator 200 can pass through a guide wire. After the end of the delivery sheath 100 reaches the desired location, the dilator 200 can be removed and the delivery cable 400 can be threaded to deliver the implantation instrument 600.

As shown in fig. 12, loader 300 includes a loader tube base 301, a loader tube body 302, a loader three-way valve 303, and a loader extension tube 304. The loader tube base 301, the loader three-way valve 303, and the loader extension tube 304 correspond to the respective components of the conveying sheath tube 100, except that the loader tube body 302 is a short straight tube structure. The second end of the steel core of the delivery cable 400 passes through the loader 300, protrudes out of the loader tube 302, attaches the implantation device 600 to the second end of the steel core, then pulls the steel core back so that the implantation device 600 is recovered within the loader tube 302, and then inserts the steel core and the loader 300 into the sheath tube 102 to deliver the implantation device 600.

As shown in fig. 13 to fig. 15, based on the above embodiment, further, the conveying system further includes an auxiliary loader 500, the auxiliary loader 500 includes a connecting pipe section 501 and a transition pipe section 502 connected with each other, and an end of the connecting pipe section 501 away from the transition pipe section 502 is detachably connected with the loader 300; the cross-sectional area of the transition pipe section 502 gradually increases from the end of the transition pipe section 502 near the connection pipe section 501 to the end of the transition pipe section 502 far from the connection pipe section 501.

In this embodiment, one end of the connection pipe section 501 may be sleeved at one end of the loader pipe body 302, so as to achieve detachable connection between the connection pipe section 501 and the transfer device. The middle through hole of the connecting pipe section 501 is a straight line, the inner through hole of the transition pipe section 502 is horn-shaped, and the cross-sectional area of one end, far away from the connecting pipe section 501, of the inner through hole of the transition pipe section 502 is large, so that in the process of conveying the steel cable 400 to retract the implantation instrument 600 to the loader 300, the transition pipe section 502 can enable the volume of the implantation instrument 600 to be gradually reduced, the implantation instrument 600 is convenient to shrink, and the conveying system is convenient to use.

As shown in fig. 13, based on any of the above embodiments, further, friction-increasing structures (e.g., a plurality of protrusions or a plurality of grooves, etc.) are disposed on the outer wall of the connecting pipe section 501 and the outer wall of the transition pipe section 502, and the friction-increasing structures can facilitate the user to hold the auxiliary loader 500.

As shown in fig. 13, in addition to any of the above embodiments, the auxiliary loader 500 further includes an intermediate pipe section 503, one end of the intermediate pipe section 503 is connected to the connecting pipe section 501, and the other end of the intermediate pipe section 503 is connected to the transition pipe section 502; the outer wall of the middle tube section 503 is disposed in an inwardly concave arc. The auxiliary loader 500 with such a structure is convenient to hold by hand and use.

On the basis of any one of the above embodiments, further, the dilator tube seat 201 is clamped with the sheath tube seat 101, and the clamping between the dilator tube seat and the sheath tube seat can be realized through the matching of the protrusion and the clamping groove, and the clamping between the dilator tube seat and the sheath tube seat can also be realized through the buckle; when the dilator 200 is mounted to the conveying sheath tube 100, the dilator tube seat 201 is clamped with the sheath tube seat 101, the dilator 200 can be positioned, the dilator 200 is prevented from moving, and when the dilator 200 needs to be withdrawn, the clamping relation between the dilator tube seat 201 and the sheath tube seat 101 can be removed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.

Claims

1. A conveying wireline, comprising: the handle, the steel core and the positioning piece; the first end of the steel core is fixedly connected with the hand-holding piece, and the second end of the steel core is used for connecting an implantation instrument; the positioning piece is fixed outside the steel core and is positioned on one side of the hand-held piece close to the second end; when the positioning piece is positioned at the initial end of the delivery sheath, the positioning piece is used for indicating the implantation instrument to reach a set position.

2. A delivery cable as in claim 1, further comprising a plurality of indicator locations, said locations being spaced along the length of said steel core.

3. The delivery cable of claim 2, wherein said plurality of positioning elements comprises a ready-to-release positioning element, said ready-to-release positioning element indicating arrival of said implantation instrument at the distal end of said delivery sheath upon reaching the beginning of said delivery sheath.

4. The delivery cable as claimed in claim 3, wherein said plurality of positioning elements further comprises a half release positioning element and a full release positioning element, said half release positioning element being located on a side of said ready-to-release positioning element adjacent to said hand-held element, said full release positioning element being located on a side of said half release positioning element remote from said ready-to-release positioning element.

5. A delivery cable as in claim 1, wherein said positioning element is a protrusion arranged outside said steel core.

6. The delivery cable according to any one of claims 1 to 5, further comprising a twist grip, a plug head and a plug sheath, said steel core comprising a lumen and a lock core; the lock cylinder penetrates through the pipe cavity; the bolt head is fixedly connected to one end of the tube cavity, and a notch is formed in the bolt head; the first end of the lock cylinder is fixedly connected with the rotary handle, and the second end of the lock cylinder penetrates through the tube cavity so as to be capable of penetrating through the notch to be in threaded connection with the part, far away from the tube cavity, of the bolt head; the fixed end of the bolt sleeve is fixedly connected to the bolt head, and the free end of the bolt sleeve can be sleeved on the lock cylinder at the notch; the hand-held piece is fixed at the position of the tube cavity close to the rotating handle.

7. The delivery cable as claimed in claim 6, further comprising a coupling sleeve and slider fingers; the connecting sleeve is fixedly connected with the lock cylinder, and the sliding block pointer is rotationally connected with the connecting sleeve; the hand-held piece is provided with a sliding groove, and the sliding block pointer is arranged in the sliding groove in a sliding manner;

8. A delivery system comprising a delivery sheath, a dilator, a loader, and a delivery cable as claimed in any one of claims 1 to 7; the dilator can be inserted within the delivery sheath, the delivery cable can be inserted within the loader, and the loader can be inserted within the delivery sheath.

9. The delivery system of claim 8, further comprising an auxiliary loader comprising a connecting tube section and a transition tube section connected to each other, wherein an end of the connecting tube section remote from the transition tube section is detachably connected to the loader; the cross-sectional area of the transition pipe section is gradually increased from one end, close to the connecting pipe section, of the transition pipe section to one end, far away from the connecting pipe section, of the transition pipe section.

10. The delivery system of claim 8, wherein said delivery sheath comprises a sheath hub and a sheath tube body connected to said sheath; the dilator comprises a dilator tube seat and a dilator tube body connected with the dilator tube seat; the dilator tube seat is clamped with the sheath tube seat.