CN115054803A

CN115054803A - Implant releasing mechanism and conveying device with same

Info

Publication number: CN115054803A
Application number: CN202210989997.2A
Authority: CN
Inventors: 刘文菁; 曹奇敏; 唐道武
Original assignee: Suzhou Meichuang Medical Technology Co ltd
Current assignee: Suzhou Meichuang Medical Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-09-16
Anticipated expiration: 2042-08-18
Also published as: CN115054803B

Abstract

The invention relates to the field of medical instruments, and provides an implant release mechanism and a conveying device with the same, wherein the release mechanism comprises: a release member; an anti-release member having a release opening formed thereon; the conveying piece is provided with a conveying cavity, and the conveying piece is provided with a jack and a slot which is suitable for being communicated with the conveying cavity through the jack; and the constraint piece is sleeved on the conveying piece and at least covers the slot. Release is after carrying in the transport chamber, its distal end can pass disengagement mouth and jack in proper order and stretch into the slot, restraint can exert binding force to the distal end of the release that lies in the slot simultaneously, make the distal end of release be retrained in the slot, the three links together this moment, connection status has, under this state, the release provides the power of stopping to anti disengagement, in order to prevent anti disengagement to the distal end motion, when the release position of implant is incorrect, can be with implant backward withdrawal partly again through pulling back the transport, then release again.

Description

Implant releasing mechanism and conveying device with same

Technical Field

The invention relates to the technical field of medical instruments, in particular to an implant releasing mechanism and a conveying device with the same.

Background

The use of interventional catheter systems for positioning and deploying an implant device in a body vessel and corresponding coordination has become a standard procedure for treating intravascular conditions, and such placement of an implant device procedure is particularly useful in treating areas where conventional surgical procedures are not possible or would pose significant risks to the patient (e.g., in treating aneurysms, arteriovenous malformations, pseudoaneurysms).

The treatment of diseases such as aneurysms is very difficult due to the traditional surgical procedures and the long recovery period of the patient is accompanied by a high risk of complications. Advances in the delivery and deployment technology of implant devices provide an alternative treatment for such conditions. These procedures include inserting a delivery catheter fitted with an implantation instrument into a patient's blood vessel and guiding deployment at the lesion, then passing the delivery system with the implantation instrument secured thereto through the delivery catheter to the treatment site, and then releasing the implantation instrument through the delivery system.

In the implantation instrument in the prior art, when mechanical connection is adopted, the pushing rod is used for directly pushing the implant out of the catheter system, namely release is carried out, the release is not controllable, the implant can not be released again after being withdrawn at the intravascular position, and the implant can cause great clinical risks at the wrong position, for example, ectopic embolism can be caused to a patient, and a plurality of complications are caused.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defects that when the mechanical connection is adopted in the prior art, the implant is directly pushed out from the catheter system by using the push rod, namely, the release is uncontrollable, the position of the implant in the blood vessel cannot be withdrawn any more, and then the implant is released again, and the implant can cause great clinical risks at the wrong position, such as ectopic embolism to a patient, and a plurality of complications, so as to provide an implant release mechanism and a delivery device with the same.

An implant release mechanism comprising: a release member; an anti-release member having a proximal end adapted to form a release opening, the implant adapted to fit over the anti-release member; the conveying piece is provided with a conveying cavity with at least one open end along the axial direction, the far-end wall surface of the conveying piece is suitable for being provided with at least one jack, the outer wall surface of the conveying piece corresponding to the jack is provided with a slot, and the slot is suitable for being communicated with the conveying cavity through the jack; the two ends of the restraint piece are provided with openings and are sleeved on the conveying piece, and the horizontal projection area of the restraint piece on the conveying piece is at least larger than the horizontal section area of the slot along the axial direction of the slot so as to at least cover the slot; the distal end of the release member is adapted to extend into the delivery cavity and sequentially pass through the release opening and the insertion hole so as to be adapted to extend into the insertion groove, the release opening of the anti-release member is adapted to extend into the delivery cavity, the restraining member is adapted to apply a restraining force to the distal end of the release member positioned in the insertion groove, and under the action of the restraining force, the distal end of the release member is adapted to be restrained in the insertion groove so that the release member, the anti-release member and the delivery member have a connection state, and in the connection state, the release member is adapted to provide a blocking force to the anti-release member so as to prevent the anti-release member from moving distally; and applying a pulling force to a proximal end of the release member, a distal end of the release member sequentially exiting the insertion slot, the insertion hole and being adapted to deform to escape from the release opening to provide the release member, the anti-release member and the delivery member with a separated state.

Optionally, in the above implant release mechanism, the release member is provided in a step shape, in the connected state, the vertical height of the release member is a first height, and in the disconnected state, the vertical height of the release member is a second height, and the first height is greater than the second height.

Optionally, in the above-mentioned implant releasing mechanism, the insertion groove is a blind groove, a groove bottom of the insertion groove is adapted to receive a distal end of the releasing member, and in the connected state, an inner wall surface of the restraining member abuts against the releasing member to apply a restraining force to the distal end of the releasing member.

Optionally, in the above-mentioned implant releasing mechanism, the restraining element is an elastic element.

Optionally, in the above-mentioned implant release mechanism, one end of the anti-release member is adapted to be bent toward the other end, and the bent portion has a space to form the release opening.

Optionally, the implant release mechanism further includes a connecting member, one end of the anti-release member is adapted to be bent toward the other end, and both ends of the anti-release member are connected to the connecting member, so that the anti-release member is in a closed loop configuration, and the implant is adapted to be sleeved on the anti-release member;

in the connected state, both ends of the implant are respectively abutted against the distal end side faces of the connecting member and the delivery member.

Optionally, in the above-mentioned implant release mechanism, a limiting member is provided on the anti-release member, the limiting member being adapted to be wound around an outer wall surface of the anti-release member in an axial direction of the anti-release member and located in a space between the implant and the anti-release member, and having a longitudinal cross-sectional area larger than a longitudinal cross-sectional area of the distal opening of the delivery lumen, so as to provide the anti-release member with a limiting force against proximal movement thereof.

Optionally, in the above-mentioned implant release mechanism, a blocking member is disposed in the delivery cavity along a delivery direction of the release member, the blocking member is provided with a passage through which the release member passes, a blocking portion is disposed on a body of the release member, and the blocking member abuts against the blocking portion in a process of the distal delivery movement of the release member along the delivery cavity, so as to prevent the distal delivery movement of the release member.

Optionally, in the above-mentioned implant releasing mechanism, the blocking member is a circular ring, and an eccentric hole is formed in the blocking member, and the eccentric hole serves as the passing member channel;

forming a flat on said release member adapted to form said blocking portion, said blocking portion abutting said ring.

Optionally, in the above-mentioned implant release mechanism, a break-off portion is provided at a proximal end of the delivery member, and a breaking force is applied to the break-off portion to bisect the delivery member at the break-off portion so that one end of the release member is exposed from within the delivery cavity.

A delivery device, comprising: a conveying pipe which is provided with a containing cavity with two open ends; an implant release mechanism, the implant release mechanism being as described above; when the release member is pulled along the delivery cavity of the delivery member to the proximal end of the delivery member, the implant can be switched from a folded state in the receiving cavity to a released state after the anti-release member is separated from the release member.

The technical scheme of the invention has the following advantages:

1. the invention provides an implant release mechanism, comprising: a release member; an anti-release member having a proximal end adapted to form a release opening, the implant adapted to fit over the anti-release member; the conveying piece is provided with a conveying cavity with at least one open end along the axial direction, the far-end wall surface of the conveying piece is suitable for being provided with at least one jack, the outer wall surface of the conveying piece corresponding to the jack is provided with a slot, and the slot is suitable for being communicated with the conveying cavity through the jack; the two ends of the restraint piece are provided with openings and are sleeved on the conveying piece, and the horizontal projection area of the restraint piece on the conveying piece is at least larger than the horizontal section area of the slot along the axial direction of the slot so as to at least cover the slot; the far end of the releasing piece is suitable for extending into the conveying cavity and sequentially penetrates through the releasing port and the inserting hole so as to be suitable for extending into the inserting groove, the releasing port of the anti-releasing piece is suitable for extending into the conveying cavity, the restraining piece is suitable for exerting restraining force on the far end of the releasing piece positioned in the inserting groove, and under the action of the restraining force, the far end of the releasing piece is suitable for being restrained in the inserting groove so that the releasing piece, the anti-releasing piece and the conveying piece have a connection state, and in the connection state, the releasing piece is suitable for providing blocking force for the anti-releasing piece and preventing the anti-releasing piece from moving towards the far end; and applying a pulling force to a proximal end of the release member, a distal end of the release member sequentially exiting the insertion slot, the insertion hole and being adapted to deform to escape from the release opening to provide the release member, the anti-release member and the delivery member with a separated state.

In the implant release mechanism with the structure, the anti-release piece is arranged, the proximal end of the anti-release piece is provided with the release port, the implant is sleeved on the anti-release piece, the far end wall surface of the conveying piece is provided with the jack and the slot, after the release piece is conveyed in the conveying cavity, the far end of the release piece can sequentially penetrate through the release port and the jack and extend into the slot, meanwhile, the restraint piece can apply restraint force to the far end of the release piece positioned in the slot, under the action of the restraint force, the far end of the release piece is restrained in the slot, at the moment, the release piece, the anti-release piece and the conveying piece are connected together to form a connection state, under the connection state, the release piece provides the stop force for the anti-release piece to prevent the anti-release piece from moving towards the far end, when the release position of the implant is incorrect, the implant can be partially withdrawn again by pulling back the conveying piece and then be released again, the release mechanism has simple integral structure and convenient operation, when the implant needs to be released, only the pulling force needs to be applied to the proximal end of the release member, so that the distal end of the release member is sequentially withdrawn from the slot and the jack into the delivery cavity after overcoming the restraining force provided by the restraining member and is suitable for deforming to be withdrawn from the release opening, and further the release member, the anti-release member and the delivery member have a separated state, thereby relieving the blocking force of the release member borne by the anti-release member, and the release opening is withdrawn from the delivery cavity, the separation of the anti-release part, the release part and the delivery part is completed, the defect that the implantation instrument in the prior art is overcome, the implant is directly pushed out from a catheter system by using a push rod, namely, the release is not controllable, the implant is released again after the position in the blood vessel cannot be withdrawn, and the implant can cause great clinical risks at wrong positions, for example, ectopic embolism can be caused to a patient, and a plurality of complications are caused.

2. In the implant release mechanism provided by the invention, a limiting piece is arranged on the anti-release piece, the limiting piece is suitable for being wound on the outer wall surface of the anti-release piece along the axial direction of the anti-release piece and is positioned in the interval between the implant and the anti-release piece, and the longitudinal cross-sectional area of the limiting piece is larger than that of the distal opening of the delivery cavity, so that the limiting force for preventing the anti-release piece from moving towards the proximal end is provided for the anti-release piece.

In the release mechanism with the structure, the limiting piece is arranged on the anti-release piece, so that the problem that one end of the anti-release piece is pulled into the delivery cavity too much to cause the implant to be separated from the anti-release piece in the process of pulling the release piece to withdraw from the slot is avoided.

3. In the implant release mechanism provided by the invention, a blocking piece is arranged in the delivery cavity along the delivery direction of the release piece, a piece passing channel for the release piece to pass through is formed in the blocking piece, a blocking part is arranged on the body of the release piece, and the blocking piece is abutted against the blocking part in the process of delivering the release piece to the far end along the delivery cavity so as to prevent the release piece from delivering to the far end.

In the release mechanism with the structure, the blocking piece is arranged in the conveying cavity and can block the release piece from continuously moving to the far end of the conveying cavity, so that the release piece can penetrate into the conveying cavity to a proper depth, and in a connection state, the anti-release piece is in a stretching state due to the fact that the anti-release piece is tensioned by the release piece, the arrangement of the blocking piece can also prevent the anti-release piece from driving the release piece to move towards the far end, and the release success rate is improved.

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 overall structural view of a release mechanism provided in a first embodiment of the present invention;

FIG. 2 is a schematic longitudinal sectional view of the release member of the release mechanism of FIG. 1 in connection with the anti-release member and the conveying member;

FIG. 3 is a schematic longitudinal cross-sectional view of the release member of the release mechanism of FIG. 1 in a separated state from the anti-release member and the conveying member;

FIG. 4 is a schematic view of the entire structure of the anti-detachment member;

FIG. 5 is a front view of the anti-release member of FIG. 4;

FIG. 6 is a top view of the anti-release member of FIG. 4;

FIG. 7 is a schematic view of the overall structure of the conveying member;

FIG. 8 is a top view of the transport element of FIG. 7;

FIG. 9 is a schematic axial cross-sectional view of the transfer member of FIG. 7;

FIG. 10 is a schematic view of the overall structure of the release member;

FIG. 11 is a top view of the release member of FIG. 10;

FIG. 12 is a front view of the release member of FIG. 10;

FIG. 13 is a schematic view of a restraint construction;

FIG. 14 is a schematic view of the structure of the blocking member;

FIG. 15 is a schematic view of the position structure of the blocking member and the conveying member;

FIG. 16 is a partial schematic view of the release member and anti-release, restraining member;

FIG. 17 is a first highly schematic view of the release member;

FIG. 18 is a second highly schematic view of the release member;

FIG. 19 is a schematic view showing an axial sectional structure of a transporting apparatus in a second embodiment;

description of reference numerals:

1. a release member;

2. an anti-release member; 201. a releasing port;

3. a conveying member; 301. a conveying cavity; 302. a jack; 303. inserting slots;

4. a restraint; 5. a connecting member; 6. a limiting member;

7. a stopper; 701. a workpiece passing channel;

8. a blocking portion; 9. a breaking part;

10. a delivery pipe; 1001. a receiving cavity;

11. an implant.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The far end and the near end in the invention are both relative to the operation end of an operator, wherein the end close to the operation end of the operator is the near end, and the end far away from the operation end of the operator is the far end.

Example 1

This embodiment describes an implant release mechanism, see fig. 1-18, comprising release member 1, anti-release member 2, delivery member 3 and constraint member 4, wherein, a release opening 201 is formed at the proximal end of the anti-release piece 2, the implant is sleeved on the anti-release piece 2, a conveying cavity 301 with at least one open end is arranged along the axial direction of the conveying piece 3, at least one jack 302 is arranged on the far-end wall surface of the conveying member 3, a slot 303 is arranged on the outer wall surface of the conveying member 3 corresponding to the jack 302, the slot 303 is communicated with the conveying cavity 301 through a corresponding jack 302, the restraint piece 4 is open at two ends, and the restraining member 4 is sleeved on the conveying member 3, and the horizontal projection area of the restraining member 4 on the conveying member 3 is at least larger than the horizontal section area of the slot 303 along the axial direction thereof, so as to at least cover the slot 303.

Specifically, referring to fig. 2, 4 and 7, the proximal end of the anti-release member 2, i.e. the end where the release opening 201 is located, is inserted into the delivery cavity 301, the distal end of the release member 1 is inserted through the release opening 201 and the insertion hole 302 in sequence and can be inserted into the insertion groove 303, and then the outer wall surface of the delivery member 3 is sleeved with a restriction member 4, the restraining member 4 is capable of exerting a restraining force on the distal end of the release member 1, which is located within the slot 303 and, under the restraining force, the distal end of the release element 1 is constrained in the slot 303, at which point the release element 1, the anti-release element 2 and the delivery element 3 are assembled together in a connected state, and in the connected state, which as a whole pushes the implant distally, while during pushing the release member 1 is able to provide a blocking force to the anti-detachment member 2, with the effect that the anti-detachment member 2 is prevented from moving distally.

When the implant and the anti-release member 2 located therein need to be separated from the release member 1, so that the release port 201 is withdrawn from the delivery cavity 301, a pulling force can be applied to the proximal end of the release member 1, and the distal end of the release member 1 can be sequentially withdrawn from the slot 303 and the insertion hole 302 located therein, and is appropriately deformed to be released from the release port 201 of the anti-release member 2, so that the release member 1, the anti-release member 2 and the delivery member 3 have a separated state.

By arranging the anti-release piece 2 and arranging the release opening 201 at the proximal end of the anti-release piece 2, the implant is sleeved on the anti-release piece 2, the far end wall surface of the conveying piece 3 is provided with the jack 302 and the slot 303, after the release piece 1 is conveyed in the conveying cavity 301, the far end of the release piece 1 can sequentially penetrate through the release opening 201 and the jack 302 and extend into the slot 303, meanwhile, the restraint piece 4 can apply restraint force to the far end of the release piece 1 positioned in the slot 303, under the action of the restraint force, the far end of the release piece 1 is restrained in the slot 303, at the moment, the release piece 1, the anti-release piece 2 and the conveying piece 3 are connected together, and the anti-release piece 2 has a connection state, under the connection state, the release piece 1 provides blocking force for the anti-release piece 2 to prevent the anti-release piece 2 from moving towards the far end, and under the condition that the release position of the implant is incorrect, at the moment, the anti-release piece 2, the release piece 1 and the conveying piece 3 are still in the connection state, further, the implant can be partially withdrawn again by pulling back the delivery member 3, and then released again, so as to avoid the problem of erroneous release, and when the operator considers that the release position of the implant is not ideal, the operator can also pull back the delivery member 3 to displace the withdrawn portion of the implant, and then release the implant again at the correct position, so that the operator has more choices, and simultaneously avoid clinical risks such as implant drift caused by the unsatisfactory release position, and the like, the release mechanism has a simple overall structure and is convenient to operate, when the implant needs to be released, only the proximal end of the release member 1 needs to be applied with pulling force, so that the distal end of the release member 1 is withdrawn from the slot 303 and the jack 302 into the delivery cavity 301 in sequence after overcoming the restraining force provided by the restraining member 4, and is suitable for being deformed to escape from the release opening 201, so that the release member 1, the anti-release member 2 and the delivery member 3 have a separated state, so that the blocking force of the releasing part 1 on the anti-release part 2 is released, the release port 201 exits the conveying cavity 301, the separation of the anti-release part 2 from the releasing part 1 and the conveying part 3 is completed, and the release of the implant is realized.

In this embodiment, in order to enable the release member 1 to be smoothly withdrawn from the slot 303 into the transportation chamber 301, the release member 1 may be disposed in a step shape, see fig. 17 and 18, in a connected state, a vertical height of the release member 1 is set to be a first height H1, in a separated state, the vertical height of the release member 1 is set to be a second height H2, and the first height H1 is greater than the second height H2.

In a specific application, the releasing member 1 may be made of a deformable material, such as a rubber material, nitinol, stainless steel, and the like, and when the releasing member 1 is assembled with the conveying member 3 and the anti-releasing member 2, by applying a traction force to the distal end of the releasing member 1, the releasing member 1 may pass through the releasing port 201 and enter the insertion slot 303 along the insertion hole 302, thereby completing the connection of the conveying member 3, the releasing member 1, and the anti-releasing member 2, and the releasing member 1 is made of a rubber material or a nitinol material, and has a high deformation degree, and can smoothly exit from the insertion slot 303 and then exit into the conveying cavity 301, and similarly, the anti-releasing member 2 may also be made of an elastic material, and the proximal end of the releasing member 2 extends into the conveying cavity 301 to a depth not exceeding the insertion hole 302, so that in a connection state, the anti-releasing member 2 is tightened on the releasing member 1.

Specifically, the length of the anti-release member 2 is smaller than the total length of the implant plus the distance from the end of the delivery member 3 in contact with the implant to the insertion hole 302, so that the anti-release member 2 can be tightened in the state of being connected to the release member 1.

In this embodiment, referring to fig. 7, the insertion slot 303 may be configured to have an open blind slot, the blind slot is opened on an outer wall surface of the conveying member 3, and a bottom of the blind slot can receive the distal end of the releasing member 1, in a connected state, an inner wall surface of the constraining member 4 abuts against the outer wall surface of the releasing member 1 to apply a constraining force to the distal end of the releasing member 1, in a specific application, the constraining member 4 may be configured to be an elastic member, for example, a heat-shrinkable sleeve made of a heat-shrinkable material, and after the heat-shrinkable sleeve is sleeved on the conveying member 3, the heat-shrinkable sleeve is heated to reduce a radial dimension thereof, so as to apply a constraining force to the distal end of the releasing member 1, and of course, a spring may also be used.

In this embodiment, referring to fig. 4, one end of the anti-release member 2 may be adapted to be bent toward the other end, and the bent portion has a space to form the release opening 201, the anti-release member 2 is shaped like a rod before being bent, and after one end of the anti-release member is bent toward the other end, one end of the anti-release member may be connected to the rod body of the anti-release member 2 near the other end, and one end of the anti-release member is bonded to the rod body at the other end, or of course, one end of the anti-release member may be directly aligned with the other end, so that the bent portion of the anti-release member 2 is located at a half position of the anti-release member 2.

Referring to fig. 4, when one end is directly aligned with the other end so that the bending position of the anti-detachment element 2 is located at a half position of the anti-detachment element 2, the implant release mechanism further comprises a connecting element 5, after one end of the anti-detachment element 2 is suitable for being bent towards the other end, both ends of the anti-detachment element are connected to the connecting element 5, so that the anti-detachment element 2 is in a closed loop arrangement, the implant is suitable for being sleeved on the anti-detachment element 2, and in a connected state, both ends of the implant are respectively abutted to the side surface of the connecting element 5 and the distal end side surface of the conveying element 3.

Referring to fig. 4, in the implant release mechanism of the present embodiment, in order to avoid the problem that one end of the anti-detachment member 2 is drawn into the delivery lumen 301 too much during the process of withdrawing the release member 1 from the insertion slot 303, resulting in detachment of the implant from the anti-detachment member 2, it is also possible to provide a restriction member 6 on the anti-detachment member 2, the limiting member 6 is adapted to be wound around the outer wall surface of the anti-detachment member 2 in the axial direction of the anti-detachment member 2, and is located in the space between the implant and the anti-detachment member 2, with a longitudinal cross-sectional area greater than that of the distal opening of the delivery lumen 301, to provide the anti-detachment member 2 with a restraining force against proximal movement, thereby avoiding the problem that one end of the anti-detachment member 2 is drawn into the delivery lumen 301 too much during the process of withdrawing the pull release member 1 from the insertion slot 303, resulting in detachment of the implant from the anti-detachment member 2.

At the same time, the provision of the limiting member 6 also avoids the risk of the anti-detachment member 2 being pulled apart by too much tension.

Specifically, the limiting member 6 may also be made of an elastic material, and the limiting member 6, the anti-release member 2, and the connecting member 5 are all made of a biocompatible material.

In order to block the release member 1 from further movement towards the distal end of the delivery chamber 301, see fig. 10 and 15, a blocking member 7 may also be provided in the delivery chamber 301 in the direction of delivery of the release member 1, the blocking piece 7 is provided with a piece passing channel 701 for the release piece 1 to pass through, and the body of the release piece 1 is provided with a blocking part 8, in the process of conveying the release piece 1 to the far end along the conveying cavity 301, the blocking part 7 is abutted against the blocking part 8 to prevent the release part 1 from continuously conveying towards the far end, so as to avoid excessive depth penetrating into the conveying cavity 301, causing the problem that the distal end of release member 1 needs to pull back release member 1 again beyond receptacle 302 and allowing release member 1 to penetrate deep into delivery lumen 301 to the appropriate depth, while, when the release member 1 pulls the anti-release member 2, the anti-release member 2 has a certain elastic potential energy, and the blocking member 7 is provided to prevent the anti-release member 2 from pulling the release member 1 toward the distal end by its elastic potential energy.

In a specific application, referring to fig. 14, the blocking member 7 may be configured as a circular ring, an eccentric hole is formed in the circular ring, the eccentric hole serves as a piece passing channel 701, referring to fig. 11, 12 and 13, a flat part is formed on the releasing member 1, so as to form the blocking portion 8, the blocking portion 8 abuts against the circular ring, so that the effect that the blocking member 7 can block the releasing member 1 from continuing to move to the distal end of the conveying cavity 301 is achieved, the blocking portion 8 is simply formed and is convenient to operate, and of course, a circle of protrusions may be provided on the circumferential surface of the releasing member 1, and the radial dimension of the protrusions and the releasing member 1 together is greater than the radial dimension of the piece passing channel 701.

In this embodiment, referring to fig. 16, the axial length of the constraining member may be set to L1, the distance from the distal end of the conveying member to the stopper is L2, in practical application, L1 may be set to be greater than L2, the conveying member 3 may be provided with an installation groove, the limiting member is connected to the inner wall surface of the conveying cavity corresponding to the installation groove, and the bottom of the limiting member is bonded to the inner wall surface of the conveying cavity, the axial length of the installation groove may be set to be slightly longer, the installation groove may be protected, and the specific length may be set according to practical application, in this embodiment, the proximal end of the conveying member 3 may be provided with a breaking part 9, and after applying the breaking force to the breaking part 9, the conveying member 3 may be divided into two at the breaking part 9, so that one end of the releasing member 1 is exposed from the conveying cavity 301, and the pulling force may be applied to the releasing member 1.

The assembly of the release mechanism of the present embodiment:

the anti-release element 2 is inserted into the implant and directly extends into the delivery cavity 301 of the delivery element 3, then the release element 1 is inserted, the release element 1 passes through the release opening 201 on the anti-release element 2, then the distal end of the release element 1 passes through the jack 302 and finally rides on the groove bottom of the slot 303 on the delivery element 3, at this time, the step height of the release element 1 is hooked on the bending part of the anti-release element 2, as shown in fig. 2, because the anti-release element 2 has certain elasticity and is not very long, the anti-release element 2 is tensioned on the release element 1, and finally, a heat-shrinkable tube is sleeved on the outer circumferential surface of the delivery element 3, namely, the distal end of the release element 1 can be fixed in the slot 303 to prevent the release element 1 from shifting, and the heat-shrinkable tube can be self-locked at the slot 303 of the delivery element 3 in a heating way.

Releasing manner of the release mechanism of the present embodiment:

when the broken part shown in fig. 1 is broken, the releasing element 1 can be pulled, and when the releasing element 1 is pulled towards the proximal end, the releasing element 1 is thin and soft and has certain elasticity, so that the releasing element 1 can be easily withdrawn from the slot 303 into the conveying cavity 301, and the anti-releasing element 2 retracts to the original position under the self elastic tension because of no blocking of the releasing element 1. Thus, the whole system is separated in a releasing way.

Example 2:

this embodiment describes a conveying apparatus, see fig. 19, including: a delivery pipe 10 having a storage chamber 1001 with both ends opened; and an implant release mechanism, the implant release mechanism being the implant release mechanism as described in example 1; wherein, when release member 1 is pulled along delivery lumen 301 of delivery member 3 towards the proximal end of delivery member 3, the implant can be switched from the collapsed state in receiving lumen 1001 to the release state after anti-release member 2 is separated from release member 1.

When the implant 11 is connected with the delivery member 3, the anti-release member 2 and the release member 1, and the operator pushes the implant 11 out of the accommodating cavity 1001, the operator can withdraw the implant 11 into the accommodating cavity 1001 again to release the implant 11 from the accommodating cavity 1001 again when finding that the release position is wrong, and the whole process only has a time of several seconds, so that the operation is rapid and does not stay for a long time.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An implant release mechanism, comprising:

a release member (1);

an anti-release member (2) having a proximal end adapted to form a release opening (201), the implant being adapted to fit over said anti-release member (2);

the conveying part (3) is provided with a conveying cavity (301) with at least one open end along the axial direction, the far-end wall surface of the conveying part (3) is suitable for being provided with at least one jack (302), the outer wall surface of the conveying part (3) corresponding to the jack (302) is provided with a slot (303), and the slot (303) is suitable for being communicated with the conveying cavity (301) through the jack (302);

the two ends of the restraint piece (4) are open and are sleeved on the conveying piece (3), and the horizontal projection area of the restraint piece (4) on the conveying piece (3) is at least larger than the horizontal section area of the slot (303) along the axial direction of the slot (303) so as to at least cover the slot (303);

the distal end of the release element (1) is adapted to extend into the delivery lumen (301), and sequentially passes through the release opening (201) and the insertion hole (302) to be suitable for extending into the insertion groove (303), the release opening (201) of the anti-release element (2) is adapted to protrude into the delivery chamber (301), said restraint (4) being adapted to apply a restraining force to a distal end of said release member (1) located within said slot (303), the distal end of the release member (1) is adapted to be constrained within the socket (303) under the constraining force, so that the release element (1), the anti-release element (2) and the transport element (3) have a connected state, in the connected state, the release member (1) is adapted to provide a blocking force to the anti-release member (2) preventing the anti-release member (2) from moving distally;

applying a pulling force to the proximal end of the release member (1), the distal end of the release member (1) exiting the insertion slot (303), the receptacle (302) in sequence and being adapted to deform to exit from the release opening (201) so as to give the release member (1), the anti-release member (2) and the delivery member (3) a separated state.

2. The implant release mechanism according to claim 1, wherein the release member (1) is stepped, wherein in the connected state the vertical height of the release member (1) is a first height, and in the disconnected state the vertical height of the release member (1) is a second height, the first height being larger than the second height.

3. The implant release mechanism according to claim 2, characterized in that the insertion slot (303) is a blind slot with a slot bottom adapted to receive the distal end of the release member (1), in the connected state the inner wall surface of the restraint member (4) abutting the release member (1) to apply a restraining force to the distal end of the release member (1).

4. The implant release mechanism according to claim 3, characterized in that the constraint (4) is a resilient element.

5. The implant release mechanism according to any of claims 1-4, wherein one end of the anti-detachment member (2) is adapted to be bent towards the other end with a space at the bend to form the detachment port (201).

6. The implant release mechanism according to claim 5, further comprising a connecting member (5), wherein after one end of the anti-detachment member (2) is adapted to be bent towards the other end, both ends of the anti-detachment member are connected to the connecting member (5) so as to enable the anti-detachment member (2) to be in a closed loop arrangement, and the implant is adapted to be sleeved on the anti-detachment member (2);

in the connected state, both ends of the implant are respectively in abutment with the distal side surfaces of the connecting element (5) and the delivery element (3).

7. The implant release mechanism according to claim 6, characterized in that a limiting member (6) is provided on the anti-detachment member (2), said limiting member (6) being adapted to be wound on the outer wall surface of the anti-detachment member (2) in the axial direction of the anti-detachment member (2) and being located in the space between the implant and the anti-detachment member (2) with a longitudinal cross-sectional area greater than the longitudinal cross-sectional area of the distal opening of the delivery lumen (301) to provide the anti-detachment member (2) with a limiting force against its proximal movement.

8. The implant release mechanism according to claim 7, wherein a stopper (7) is arranged in the delivery cavity (301) along the delivery direction of the release element (1), the stopper (7) is provided with an element passing channel (701) for the release element (1) to pass through, a stopper (8) is arranged on the body of the release element (1), and during the distal delivery movement of the release element (1) along the delivery cavity (301), the stopper (7) abuts against the stopper (8) to prevent the distal delivery movement of the release element (1).

9. The implant release mechanism according to claim 8, characterized in that the blocking member (7) is a circular ring, which is provided with an eccentric hole, and the eccentric hole is used as the passing member channel (701);

-forming a flat level on said release element (1) suitable for forming said blocking portion (8), said blocking portion (8) being in abutment with said circular ring.

10. The implant release mechanism according to claim 9, wherein a break (9) is provided at the proximal end of the delivery member (3), a breaking force being applied to the break (9) to bisect the delivery member (3) at the break (9) to expose one end of the release member (1) from within the delivery lumen (301).

11. A conveyor apparatus, comprising:

a delivery pipe (10) having a housing chamber (1001) with both ends open;

an implant release mechanism according to any one of claims 1 to 10;

wherein, when the releasing element (1) is pulled to the proximal end of the conveying element (3) along the conveying cavity (301) of the conveying element (3), the implant can be switched from a furled state of furling in the containing cavity (1001) to a released state of separating the anti-release element (2) and the releasing element (1).