CN114948046B - Delivery system for implant - Google Patents
Delivery system for implant Download PDFInfo
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- CN114948046B CN114948046B CN202210377070.3A CN202210377070A CN114948046B CN 114948046 B CN114948046 B CN 114948046B CN 202210377070 A CN202210377070 A CN 202210377070A CN 114948046 B CN114948046 B CN 114948046B
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- implant
- core wire
- inner core
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- axial direction
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
- A61B2017/12054—Details concerning the detachment of the occluding device from the introduction device
Abstract
The present application provides a delivery system for an implant. The system comprises: the conveying rod, the inner core wire and the releasing component; the conveying rod is of a hollow structure along the axial direction; the disengagement assembly is located at an end of the conveyor bar and comprises: a connecting piece and a fixed claw; one end of the connecting piece is connected with the implant, the other end of the connecting piece is mechanically locked with the fixed claw, and the fixed claw is connected with the inner core wire; the inner core wire is positioned in the hollow structure of the conveying rod and can pull the fixing claw to move axially in the direction away from the implant, and the fixing claw is disengaged from the connecting piece, so that the implant is disengaged in the axial direction of the conveying rod. This conveying system is at the desorption in-process of implant, easy operation, and the implant desorption is stable, and does not have the desorption result, can shorten the operation time greatly, reduces the thrombus and produces the probability, effectively reduces the damage to blood, blood vessel, very big reduction the clinical risk of operation in-process.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a conveying system for an implant
Background
Intracranial aneurysm is the most main disease species of hemorrhagic cerebrovascular disease, if the intracranial aneurysm ruptures and bleeds, the intracranial aneurysm is easy to cause disability and even death, and intratumoral embolism through endovascular intervention operation is the main treatment mode for treating the intracranial aneurysm.
In clinical procedures, it is generally necessary to deliver an intratumoral implant to an aneurysm through a delivery system and then achieve intratumoral embolization by detachment of the delivery system from the intratumoral implant. At present, the commonly used release modes of intratumoral embolic implants and delivery systems mainly comprise hydrolysis, mechanical release, electrolysis and thermal fusion. The hydrolytic release is realized by injecting a solvent into a delivery system for dissolution, so that the implant is rarely used clinically due to unstable release, and mechanical release, electrolytic release and thermal release have different degrees of clinical risks in the operation process.
Therefore, it is desirable to provide a solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
It is an object of the present application to provide a delivery system for an implant that solves or alleviates the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the present application provides a delivery system for an implant, comprising: the conveying rod, the inner core wire and the releasing component; the conveying rod is of a hollow structure along the axial direction; the disengaging assembly is located at an end of the conveyor bar and comprises: a connecting piece and a fixed claw; one end of the connecting piece is connected with the implant, the other end of the connecting piece is connected with the fixed claw in a matching way, and the fixed claw is connected with the inner core wire; the inner core wire is positioned in the hollow structure of the conveying rod and can pull the fixing claw along the axial direction, so that the fixing claw has displacement along the axial direction, and the fixing claw and the connecting piece are locked or unlocked in a matching manner.
Preferably, an annular groove is formed in one end, matched with the fixing claw, of the connecting piece along the circumferential direction, and correspondingly, the fixing claw is matched with the annular groove to lock or release the connecting piece.
Preferably, one end of the connecting rod is spherical, and the annular groove is circumferentially arranged on the outer surface of the sphere.
Preferably, the disengaging assembly further comprises: a wedge block; the outer peripheral wall of the wedge-shaped block is matched and fixed with the inner peripheral wall of the hollow structure of the conveying rod, a tapered hole is formed in the wedge-shaped block along the axial direction, and a plurality of non-through grooves extending along the bus direction are formed in the side wall of the tapered hole; a spring is arranged in each non-through groove; correspondingly, the fixing claws are correspondingly arranged in the non-through type grooves and can move along the non-through type grooves under the action of the inner core wire and the spring.
Preferably, a stopper is arranged at the end of the conveying rod, and the stopper is matched with the through end of the non-through groove to prevent the fixed claw from moving.
Preferably, the method further comprises the following steps: a fixing clip; the fixing clamp and the releasing component are oppositely arranged at two ends of the conveying rod and are matched with the inner core wire so as to clamp or release the inner core wire.
Preferably, a limiting opening is formed in the conveying rod along the axial direction; correspondingly, the implant delivery system further comprises: the limiting pin is positioned in the limiting opening and can move in the limiting opening along the axial direction; the limiting pin is fixedly connected with the inner core wire so as to drive the inner core wire to move along the axial direction.
Preferably, a handle is arranged at one end of the conveying rod, which is far away from the releasing component; one end of the handle is in adaptive connection with the limiting pin, and the handle can rotate to drive the limiting pin to move in the limiting opening along the axial direction.
Preferably, the handle is connected with the inner peripheral wall of the conveying rod through an end plug, wherein the end plug is fittingly connected with the inner peripheral wall of the conveying rod, and the handle is in threaded fit with the end plug and is connected with the limit pin after passing through the end plug along the axial direction.
Preferably, the inner core wire is connected with the fixing claw in a heat shrinkage mode.
Has the advantages that:
according to the technical scheme of the conveying system for the implant, the conveying rod is of a hollow structure along the axial direction, the end part of the conveying rod is provided with the releasing component, one end of the connecting piece in the releasing component is connected with the implant, the other end of the connecting piece in the releasing component is connected with the fixed claw of the releasing component in a matched mode, and the fixed claw is connected with the inner core wire located in the hollow structure of the conveying rod, so that the fixed claw is driven to displace towards the direction away from the implant along with the movement of the inner core wire towards the direction away from the implant, and the fixed claw is locked with the connecting piece; as the inner core wire is pulled and moved in a direction approaching the implant, the fixing claw is displaced in a direction approaching the implant, and the engagement between the fixing claw and the connecting member is released, so that the implant is separated from the delivery rod. In the process of releasing the implant, the operation is simple, the implant is released stably, and no release product exists, so that the operation time can be greatly shortened, the probability of thrombus generation is reduced, the damage to blood and blood vessels is effectively reduced, and the clinical risk in the operation process is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
FIG. 1 is a schematic structural view of a delivery system for an implant according to some embodiments of the present application;
FIG. 2 is a schematic structural view of a trip assembly provided in accordance with some embodiments of the present application;
FIG. 3 is a view of the disengaging assembly B-B of the embodiment of FIG. 2;
fig. 4 is a schematic structural view of a wedge provided in accordance with some embodiments of the present application;
FIG. 5 is a side view of the wedge block of the embodiment of FIG. 4;
FIG. 6 is a schematic view of an implant coupled to a delivery system provided according to some embodiments of the present application;
FIG. 7 is a release schematic of an implant and delivery system provided according to some embodiments of the present application;
FIG. 8 is a schematic structural view of another delivery system for implants provided in accordance with some embodiments of the present application;
FIG. 9 is a locking schematic of a holding pawl and a coupling member provided in accordance with some embodiments of the present application;
fig. 10 isbase:Sub>A viewbase:Sub>A-base:Sub>A of the embodiment shown in the figure.
Description of reference numerals:
1. a connecting member; 2. a stopper; 3. a fixed jaw; 4. a spring; 5. a wedge block; 6. an inner core wire; 7. a conveying rod; 8. a fixing clip; 9. a pull ring; 10. a limit pin; 11. a handle; 12. an end plug.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application encompass such modifications and variations as fall within the scope of the appended claims and their equivalents.
At present, in the detachment mode of the intratumoral embolic implant from the delivery system, the electrolytic detachment mainly realizes the separation of the implant from the delivery system through electrochemical reaction, and the electrochemical reaction is generated at the connection part of the implant and the delivery system to realize the disconnection of the connection part by introducing electrodes and electric wires and electrifying the electric wires, so that the implant is separated from the delivery system. Generally, the connecting part is made of metal which is sensitive to current or is easy to generate electrochemical reaction, the conveying system is connected with the implant through welding, and the welding part is difficult to treat uniformly, so that the electrochemical reaction time is unstable, the release time is different from 30 seconds to several minutes, great inconvenience is brought to clinical operation, and the risk of damaging blood vessels exists.
The thermal fuse is fused to realize the separation of the implant from the conveying system mainly through the thermal effect, an electrode and an electric wire need to be introduced, the heat is generated through the electrification of the electric wire, and the thermal fuse is fused when the heat reaches a certain temperature, so that the implant is released. Generally, the fuse wire is a high-molecular wire material sensitive to heat effect, and local high temperature is easily generated instantaneously in the release process to cause local damage to blood vessels.
The mechanical release is mainly to connect and disconnect the implant and the delivery system by means of mechanical connection, and the separation of the implant and the delivery system is generally realized by mechanical cooperation between release components. Therefore, the applicant provides a conveying system for the implant through researching the prior art, the connection and the disconnection of the implant are realized through a mechanical connection mode, and through the structural design of a disconnection component, the mechanical locking between the conveying system and the implant is safe and reliable, the influence of mechanical force on the implant in the conveying process is effectively reduced, and the implant is prevented from being accidentally disconnected; in the implant releasing process, the release of the implant is controlled along the axial direction of the conveying system, and the influence of the conveying system on the position of the implant in the releasing process is effectively reduced.
For convenience of description, in the embodiments provided herein, the end of the delivery rod near the implant is defined as a distal end, the end far from the implant is defined as a proximal end, and the axial extension direction of the delivery rod is defined as an axial direction.
First embodiment
As shown in fig. 1, 2 and 3, the delivery system for an implant includes: the conveying rod 7, the inner core wire 6 and the releasing component; the conveying rod 7 is of a hollow structure along the axial direction; the disengaging assembly is located at the end of the conveyor bar 7 and comprises: the connecting piece 1 and the fixed claw 3; one end of the connecting piece 1 is connected with the implant, the other end is connected with the fixed claw 3 in a matching way, and the fixed claw 3 is connected with the inner core wire 6; the inner core wire 6 is positioned in the hollow structure of the conveying rod 7 and can fix the claw 3 along the axial direction, so that the fixing claw 3 has displacement along the axial direction, and the matching between the fixing claw 3 and the connecting piece 1 is locked or released.
In this application embodiment, carry pole 7 to adopt hollow tube material, and the release subassembly is installed in hollow structure's one end, drives stationary dog 3 through the inner core silk 6 that is located carry pole 7 hollow structure and produces the displacement along the axial, ensures that the implant can be released along the axial, effectively reduces the position deviation that the influence of the mechanical force in the machinery release brought the implant, ensures the reliability of implant release.
The fixing claw 3 is driven to generate axial displacement by the traction of the inner core wire 6, and when the inner core wire 6 drives the fixing claw 3 to move towards the direction (namely the near end) far away from the implant, the fixing claw 3 is locked with the connecting piece 1; when the inner core wire 6 moves the fixing jaw 3 toward the direction of approaching the implant (i.e., the proximal end), the fixing jaw 3 is released from the connecting member 1.
In addition, the release between the fixing claws 3 and the core wire 6 can also be released by pulling the core wire 6 to move in a direction away from the implant (proximal end) to break the core wire 6 and release the engagement between the fixing claws 3 and the connecting member 1. Specifically, the inner core wire 6 is broken near the proximal end of the delivery rod 7, releasing the engagement between the fixation claws 3 and the attachment 1, and releasing the implant.
The fixing claw 3 and the connecting piece 1 are mechanically locked, so that the risk of accidental separation of the implant in the implant conveying process is effectively reduced, and the safety and reliability in conveying of the implant are ensured; utilize inner core silk 6 to move along axial tractive in hollow structure, drive stationary dog 3 and have along axial displacement, the cooperation between instantaneous release stationary dog 3 and the connecting piece 1 to realize the instantaneous release of implant, the process of releasing is simple reliable, and whole in-process of releasing does not have the thing of releasing and produces, has effectively reduced thrombus emergence probability, and has reduced the harm to blood, blood vessel.
In some alternative embodiments, the connecting element 1 is provided with an annular groove along the circumference at the end that is engaged with the fixing jaw 3, and correspondingly, the fixing jaw 3 is engaged with the annular groove to lock or release the connecting element 1. Furthermore, one end of the connecting rod is spherical, and the annular groove is formed in the outer surface of the spherical body along the circumferential direction.
Specifically, one end of the connecting piece 1, which is far away from the implant, is designed to be a sphere, an annular groove is arranged along the great circle of the sphere, and the head of the fixed claw 3 can be a sphere matched with the annular groove; furthermore, after the annular groove is mechanically locked with the head of the fixed claw 3, the ball body can be effectively ensured to be positioned at the center of the mechanical claw, so that the connecting piece 1, the implant and the center of the mechanical claw are positioned on the same straight line. After the inner core wire 6 is pulled along the axial direction and the fixing claw 3 is separated from the ball body of the connecting piece 1, the implant is ensured to be separated along the axial direction, and the position influence of mechanical force on the implant is effectively reduced. Here, it should be noted that the globular head of stationary dog 3 that this application embodiment provided has at least three, and along the circumference equipartition of stationary dog 3 for, behind the globular head of stationary dog 3 and the cooperation of annular groove, make the connecting rod along axial atress even, avoid the unbalance loading operating mode, ensure on the axis of connecting rod and implant equal position conveying pole 7, make implant and conveying pole 7 coaxial.
In some alternative embodiments, as shown in fig. 4 and 5, the disengaging assembly further comprises: a wedge block 5; the outer peripheral wall of the wedge-shaped block 5 is matched and fixed with the inner peripheral wall of the hollow structure of the conveying rod 7, a tapered hole is formed in the wedge-shaped block 5 along the axial direction, and a plurality of non-through grooves extending along the bus direction are formed in the side wall of the tapered hole; a spring 4 is arranged in each non-through groove; correspondingly, the fixing claws 3 are correspondingly arranged in the plurality of non-through grooves and can move along the non-through grooves under the action of the inner core wire 6 and the spring 4.
In the embodiment of the present application, the outer circumferential wall of the wedge-shaped block 5 may be tightly fitted (e.g., interference fitted) with the inner circumferential wall of the hollow structure of the feeding rod 7, thereby fixing the wedge-shaped block 5 in the hollow structure of the feeding rod 7.
The outer peripheral wall of the wedge-shaped block 5 and the inner peripheral wall of the hollow structure of the conveying rod 7 can also be adaptive conical surfaces, and the conical surfaces of the inner peripheral wall of the hollow structure of the conveying rod 7 are in a tapered structure from the far end to the near end, so that when the inner core wire 6 is pulled axially, the connection tightness between the wedge-shaped block 5 and the conveying rod 7 is further enhanced due to mutual extrusion.
In the embodiment of the present application, the wedge block 5 may be an integrally formed structure, or may be formed by connecting a plurality of wedge sub-blocks that are adapted to each other in a matching manner.
When the wedge block 5 is an integrally formed structure, a tapered hole is axially formed in the wedge block 5, the small end of the tapered hole faces the near end of the conveying rod 7, and the large end of the tapered hole faces the far end of the conveying rod 7. Thereby, by pulling the fixing jaw 3 axially by the inner core wire 6 to move towards the proximal end of the delivery rod 7, the ball connecting the rod end can be made to abut against the side wall of the tapered hole, ensuring that the connecting rod and the implant are located on the axis of the delivery rod 7, so that the implant is coaxial with the delivery rod 7, as shown in fig. 6; when the inner core wire 6 is released and the fixing jaw 3 is pulled to move towards the distal end of the delivery rod 7, the implant is released along the axial direction of the delivery rod 7, and the position deviation of the implant is reduced, as shown in fig. 7.
The side wall of the conical hole is provided with a plurality of non-through grooves extending along the bus direction, the non-through grooves are uniformly distributed along the circumferential direction, the fixed claws 3 are correspondingly arranged in the non-through grooves, after the fixed claws 3 and the annular grooves in the connecting rod are mechanically locked, the connecting rod is prevented from being under the action of unbalance loading of the fixed claws 3, the spherical center of the sphere of the connecting rod is further ensured to be positioned on the axis of the conveying rod 7, and the influence deviation of mechanical force on the detachment of the implant is reduced.
By utilizing the spring 4 arranged in the non-through groove, the fixed claw 3 is abutted against one end of the spring 4 at the far end, and when the inner core wire 6 pulls the fixed claw 3 to move towards the near end of the conveying rod 7 along the axial direction, the spring 4 is extruded by the fixed claw 3 and is continuously compressed along the non-through groove; when the inner core wire 6 is released, the fixing claws 3 move towards the far end of the conveying rod 7 along the non-through grooves under the action of the elastic force of the spring 4, so that the matching between the fixing claws and the connecting piece 1 can be released instantly, the connecting piece 1 is released, and the implant is released. The whole process is simple and controllable to operate, no decomposition product is generated, and the occurrence rate of thrombus is effectively reduced; and can effectively shorten the operation time and reduce the damage to blood and blood vessels.
Here, one end of the non-through pocket is an open end for fitting the spring 4 and the fixing claw 3 into the non-through pocket, and after the spring 4 is fitted, one end of the spring 4 abuts against the non-open end of the non-through pocket, and after the fixing claw 3 is fitted, the other end of the spring 4 abuts. The inner core wire 6 penetrates through the through hole on the non-opening end of the non-through type groove along the axis of the spring 4 from the inside of the spring 4 and is connected with the fixed claw 3. It should be noted that the cross-sectional shape of the non-through recess is adapted to the outer shape of the fixed claw 3.
When wedge 5 constitutes for the cooperation of the wedge subblock of a plurality of mutual adaptations, after a plurality of wedge subblocks cooperate each other, the inclined plane (being the wedge face) of wedge subblock mutually support and form the bell mouth, and set up non-through recess on the wedge face of wedge 5 to installation spring 4 and stationary dog 3, specific mounting means is the same with integrated into one piece's wedge 5, no longer gives unnecessary the description one by one here.
In a specific example, the end of the feed rod 7 is provided with a stopper 2, and the stopper 2 is engaged with the through end of the non-through type recess to prevent the movement of the fixing jaw 3. Thereby, the fixed claw 3 is prevented from coming out of the through end of the non-through type groove during the moving process.
In an application scene, the through end of the non-through groove is connected with the large end of a conical hole formed in the wedge block 5 along the axial direction, at the moment, the wedge block 5 is installed in the hollow structure of the conveying rod 7, the stop block 2 can be arranged on the end surface of the conveying rod 7, and the end surface of the stop block 2 is fixedly connected with the end surface of the conveying rod 7 and is abutted against the large end of the circular truncated cone; the stop block 2 can also be positioned in the hollow structure, the outer peripheral wall of the stop block 2 is matched and connected with the inner peripheral wall of the hollow structure of the conveying rod 7, and the end surface of the stop block 2 is connected with the large end of the conical hole. Here, it should be noted that the stopper 2 is provided with a through hole in the axial direction so that the connecting rod can pass through the through hole.
In addition, a stepped boss may be provided on the inner peripheral wall of the feed rod 7, and the surface of the boss is engaged with the end surface of the stopper 2 or the wedge 5 to position the stopper 2 or the wedge 5.
In some alternative embodiments, the delivery system for an implant further comprises: the fixing clamp 8 is arranged at two ends of the conveying rod 7 opposite to the releasing component, and the fixing clamp 8 is matched with the inner core wire 6 so as to clamp or release the inner core wire 6. Specifically, the clamping of the core wire 6 is realized by clamping the fixing clamp 8, the release of the core wire 6 is realized by breaking the fixing clamp 8, and further, the position of the core wire 6 is limited. Here, the fixing clip 8 is connected to the proximal end surface of the delivery rod 7 to be operated quickly and conveniently during the delivery of the implant to clamp or release the inner core wire 6, thereby reducing the operation time and improving the operation efficiency.
Specifically, the fixing clip 8 is of a folding structure, and after the fixing clip 8 is unfolded along the length direction, two ends of the fixing clip 8 are respectively the mutually attached parts after the fixing clip 8 is folded, so that after the fixing clip 8 is folded, a clamping part of the fixing clip 8 is formed. Further, after the fixing clamp 8 is unfolded, the arc-shaped convex surfaces or the arc-shaped concave surfaces matched with each other are respectively arranged at the two ends of the fixing clamp along the length direction, so that after the fixing clamp 8 is folded, the convex surfaces and the concave surfaces at the two ends are mutually attached to clamp the inner core wire 6. After the fixing clip 8 is folded, the end opposite to the clamping portion has a hollow arc-shaped structure in the width direction. Here, the fixing clip 8 may be made of a material having certain elasticity and rigidity, so as to effectively improve the clamping effect of the clamping portion of the fixing clip 8 on the core wire 6, and simultaneously, when the fixing clip 8 is broken open to release the core wire 6, ensure that the hollow arc structure has a proper restoring force.
It should be noted that in the embodiment of the present application, one end of the inner core wire 6 passes through the fixing clip 8 and then is connected to a pulling ring 9 disposed at the proximal end of the conveying rod 7, and the pulling ring 9 is pulled to realize the axial movement of the inner core wire 6 in the hollow structure of the conveying rod 7, so as to improve the operation convenience of the conveying system.
In some alternative embodiments, the core wire 6 is heat-shrunk to the fixing jaw 3. Specifically, the inner core wire 6 can be made of high polymer materials, the fixing claws 3 can be made of metal wire materials, and the inner core wire and the fixing claws are effectively connected through a thermal shrinkage mode. Therefore, the connection convenience and reliability between the inner core wire 6 and the fixed claw 3 are effectively improved.
In the embodiment of the application, the mechanical locking between the delivery system and the implant is safe and reliable, the influence of mechanical force on the implant in the delivery process is effectively reduced, the implant is prevented from being accidentally separated, and the delivery safety of the implant is ensured; during the process of releasing the implant, when the inner core wire 6 is pulled and moved towards the direction close to the implant, the fixing claws 3 have axial displacement, and the cooperation between the fixing claws 3 and the connecting piece 1 is released, so that the implant is separated from the conveying rod 7. In the releasing process of the implant, the releasing of the implant is controlled along the axial direction of the conveying system, the position influence of the conveying system on the implant in the releasing process is effectively reduced, the operation is simple, the implant is released stably, releasing products are not generated, the operation time can be greatly shortened, the probability of thrombus generation is reduced, the damage to blood and blood vessels is effectively reduced, the stability and the reliability of the releasing of the implant are enhanced, and the clinical risk in the operation process is greatly reduced.
Second embodiment
In the embodiment of the present application, only the different parts from the first embodiment are described in detail, and the same parts are not described in detail.
In some alternative embodiments, as shown in fig. 8, the conveying rod 7 is provided with a limiting opening along the axial direction; correspondingly, the implant delivery system further comprises: the limiting pin 10 is positioned in the limiting opening, and the limiting pin 10 can move in the limiting opening along the axial direction; wherein, the spacing pin 10 is fixedly connected with the inner core wire 6 to drive the inner core wire 6 to move along the axial direction.
Specifically, the limiting port is arranged at the proximal end side of the conveying rod 7, is positioned on the side wall of the conveying rod 7, and is communicated with the hollow structure of the conveying rod 7; the limiting pin 10 is installed in the limiting hole, and the moving stroke of the limiting pin 10 is limited through two ends of the limiting hole. When the limiting pin 10 moves towards the near end in the limiting hole, the inner core wire 6 is driven to move towards the near end, and the fixing claw 3 and the connecting piece 1 are driven to be mechanically locked; when the limiting pin 10 moves towards the far end in the limiting hole, the fixing claw 3 is disengaged from the connecting piece 1, so that the implant is disengaged along the axial direction of the conveying rod 7. Therefore, the movement strokes of the inner core wire 6 and the fixed claw 3 are limited through the matching of the limiting pin 10 and the limiting opening, and the reliability of component removal is further improved.
Further, a handle 11 is arranged at one end of the conveying rod 7, which is far away from the disengaging component; one end of the handle 11 is connected with the limit pin 10 in an adaptive manner, and the handle 11 can rotate to drive the limit pin 10 to move in the limit opening along the axial direction. Specifically, the handle 11 extends into one end of the hollow structure of the conveying rod 7 and is connected with the limiting pin 10 through the clamping groove, so that the rotary motion of the handle 11 is converted into the linear motion of the limiting pin 10, the limiting pin 10 moves in the limiting opening along the axial direction, the convenience of the operation of the conveying system is improved, and the conveying efficiency of the operation conveying system for the implant is further improved. Here, the clamping groove is spherical, that is, the section of the clamping groove along the axial direction of the conveying rod 7 is circular, and the axial line of the clamping groove coincides with the axial line of the conveying rod 7; the shape of the limiting pin 10 is matched with the sphere of the clamping groove, so that the limiting pin can move in the clamping groove along the axial direction of the conveying rod 7 after being matched with the spherical clamping groove.
In the embodiment of the present application, as shown in fig. 9 and 10, the fixing claws 3 are located in the non-through grooves of the wedge block 5, the springs 4 are not arranged in the non-through grooves, and the cooperation between the fixing claws 3 and the connecting piece 1 is released by the axial force value for converting the rotation of the handle 11. Specifically, the rotation of the handle 11 is converted into the movement of the limit pin 10 towards the far end of the conveying rod 7, and then the force value of the axial movement is transmitted to the inner core wire 6, so that the inner core wire moves towards the far end of the conveying rod 7, and the matching between the fixed claw 3 and the connecting piece 1 is released, so that the implant is separated from the conveying rod 7.
Further, the handle 11 is connected with the inner peripheral wall of the conveying rod 7 through an end plug 12, wherein the end plug 12 is fittingly connected with the inner peripheral wall of the conveying rod 7, and the handle 11 is in threaded fit with the end plug 12 and is connected with the limit pin 10 after passing through the end plug 12 in the axial direction. Specifically, the middle part of the end plug 12 is provided with a threaded hole along the axial direction, the handle 11 is provided with an external thread matched with the threaded hole, and one end of the handle 11 penetrates through the threaded hole and then is connected with the limit pin 10. Therefore, the handle 11 is in threaded fit with the end plug 12, the rotary motion of the handle 11 is converted into the linear motion of the limit pin 10, the limit pin 10 moves in the limit port along the axial direction, and the operation convenience of the conveying system is improved.
Here, the outer peripheral wall of the end plug 12 and the inner peripheral wall of the conveying rod 7 have the same shape, and the two may be in interference fit, or may be connected by an adaptive connection manner such as a sliding groove, a clamping groove, and the like, which is not limited in the embodiment of the present application.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (7)
1. A delivery system for an implant, comprising: the conveying rod, the inner core wire and the releasing component are arranged on the conveying rod;
the conveying rod is of a hollow structure along the axial direction;
the disengagement assembly is located at an end of the conveyor bar and comprises: a connecting piece and a fixed claw; one end of the connecting piece is connected with the implant, the other end of the connecting piece is connected with the fixed claw in a matching way, and the fixed claw is connected with the inner core wire;
the inner core wire is positioned in the hollow structure of the conveying rod and can pull the fixing claw along the axial direction, so that the fixing claw has displacement along the axial direction, and the fixing claw and the connecting piece are locked or unlocked in a matching way;
an annular groove is arranged on one end of the connecting piece matched with the fixed claw along the circumferential direction,
in a corresponding manner, the first and second optical fibers are,
the fixing claw is matched with the annular groove to lock or release the connecting piece;
one end of the connecting rod is spherical, and the annular groove is formed in the outer surface of the spherical shape along the circumferential direction;
the disengaging assembly further comprises: a wedge block;
the outer circumferential wall of the wedge-shaped block is matched and fixed with the inner circumferential wall of the hollow structure of the conveying rod, a conical hole is formed in the wedge-shaped block along the axial direction, and a plurality of non-through grooves extending along the bus direction are formed in the side wall of the conical hole; a spring is arranged in each non-through groove;
in a corresponding manner, the first and second optical fibers are,
the fixing claws are correspondingly arranged in the non-through grooves and can move along the non-through grooves under the action of the inner core wires and the springs.
2. The delivery system for implant of claim 1, wherein the end of the delivery rod is provided with a stopper cooperating with the through end of the non-through recess to prevent the movement of the fixing jaw.
3. The delivery system for an implant of claim 1, further comprising: a fixing clip;
the fixing clamp and the releasing component are oppositely arranged at two ends of the conveying rod and are matched with the inner core wire so as to clamp or release the inner core wire.
4. The delivery system for implants of claim 1, wherein the delivery rod is provided with a limit port along the axial direction;
in a corresponding manner, the first and second optical fibers are,
the implant delivery system further comprises: the limiting pin is positioned in the limiting opening and can move in the limiting opening along the axial direction; the limiting pin is fixedly connected with the inner core wire so as to drive the inner core wire to move along the axial direction.
5. The implant delivery system of claim 4, wherein a handle is provided on an end of the delivery rod distal from the release assembly;
one end of the handle is connected with the limiting pin in an adaptive mode, and the handle can rotate to drive the limiting pin to move in the limiting opening along the axial direction.
6. The delivery system for an implant of claim 5, wherein the handle is connected to an inner peripheral wall of the delivery rod by an end plug,
the end plug is in adaptive connection with the inner peripheral wall of the conveying rod, and the handle is in threaded fit with the end plug and is connected with the limiting pin after axially penetrating through the end plug.
7. The delivery system for an implant of any of claims 1-6, wherein the inner core wire is heat shrunk to the fixation pawl.
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| CN202210377070.3A CN114948046B (en) | 2022-04-11 | 2022-04-11 | Delivery system for implant |
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| CN202210377070.3A CN114948046B (en) | 2022-04-11 | 2022-04-11 | Delivery system for implant |
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| CN114948046B true CN114948046B (en) | 2023-02-28 |
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| CN114469230B (en) * | 2022-01-26 | 2023-08-11 | 上海心玮医疗科技股份有限公司 | Delivery release device for medical implants |
| CN115607218B (en) * | 2022-09-28 | 2023-11-07 | 上海心玮医疗科技股份有限公司 | Mechanical release device for intratumoral implant |
| CN115607219B (en) * | 2022-10-18 | 2023-11-24 | 南京思脉德医疗科技有限公司 | Release device of vascular embolism spring ring |
| CN115944343A (en) * | 2022-12-07 | 2023-04-11 | 上海心玮医疗科技股份有限公司 | Tumor internal dense net support and support system |
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