CN115721388A - Implant conveying device - Google Patents

Abstract

The invention discloses an implant conveying device which comprises a conveying catheter, wherein the conveying catheter comprises an inner pipe and an outer pipe, the outer pipe is sleeved with the inner pipe in an axially movable mode and comprises a large-diameter section and a small-diameter section which are connected in an axial mode, the large-diameter section is located at the far end of the outer pipe, and a loading cavity is formed between the large-diameter section and the inner pipe; still include the screw rod portion of suit inner tube to and the regulating part of suit screw rod portion, the regulating part can drive the outer tube along axial displacement, the inside wall part of regulating part be provided with screw rod portion external screw thread assorted internal thread, and the regulating part can switch at primary importance and second position: when the adjusting part is at the first position, the internal thread is meshed with the screw rod part; when the adjusting part is located at the second position, the internal thread is separated from the screw rod part. The invention can realize the functions of quick and slow release of the implant, meet the requirement of accurate release of the implant, shorten the operation time, improve the working efficiency, have simple structure and reduce the production cost.

Description

An implant delivery device

technical field

The invention relates to the technical field of medical instruments, in particular to an implant delivery device.

Background technique

The use of percutaneous interventional technology for disease treatment is an increasingly widespread treatment method in the medical field. Specifically, implants are carried by implant delivery devices, such as valves, aortic stents, etc., percutaneously implanted into the patient's body, and delivered to the patient's body. lesion, and then release the implant.

In the process of operation, it is generally required that the conveyor has different conveying speeds to realize slow or fast release, but the existing devices cannot realize slow and fast release at the same time, and there are problems of too many parts and complex structure.

Contents of the invention

The purpose of the present invention is to provide an implant delivery device, which realizes slow and rapid release of the implant at the same time, satisfies the precise implantation of the implant, shortens the operation time, improves work efficiency, and has a simple structure and reduces production costs. cost.

In order to solve the above technical problems, the present invention provides an implant delivery device, which includes a delivery catheter, the delivery catheter includes an inner tube and an outer tube that can axially movably fit the inner tube, and the outer tube includes an axial connection A large-diameter section and a small-diameter section, the large-diameter section is located at the distal end of the outer tube, and a loading chamber is provided between the large-diameter section and the inner tube;

It also includes a screw part that fits the inner tube, and an adjustment part that fits the screw part. The adjustment part can drive the outer tube to move in the axial direction. The inner side wall of the adjustment part is partially provided with a The external thread matches the internal thread, and the adjustment part can be switched between the first position and the second position:

When the adjustment part is at the first position, the internal thread is engaged with the screw part; when the adjustment part is at the second position, the internal thread is disengaged from the screw part.

The implant delivery device of the present invention realizes the slow and fast release of the implant by driving the regulating part to switch between the first position and the second position. Specifically, when the regulating part is in the first position, the inner thread and the The screw part is engaged, at this time, only the adjustment part can be rotated, and the adjustment part moves slowly along the axial direction of the screw part, and drives the outer tube to move slowly along the axial direction, and the implant loaded in the loading chamber is slowly released or recovered; And when the adjustment part is in the second position, the internal thread is separated from the screw part. At this time, the adjustment part is in an active state, which can drive the adjustment part to move quickly along the axial direction of the screw part, and drive the outer tube to move quickly along the axial direction, realizing Quick release or recovery of loads.

Therefore, the implant delivery device of the present invention can realize fast and slow release of the implant at the same time, which not only satisfies the precise release of the implant, but also shortens the operation time, improves work efficiency, has a simple structure, and reduces production costs.

Optionally, the adjustment part includes an outer sleeve and an inner sleeve, the peripheral wall of the outer sleeve is provided with an opening matching the inner sleeve, and the inner sleeve is inserted into the outer sleeve Inside, the inner side wall of the inner sleeve is provided with the inner thread at a position opposite to the opening, and the inner sleeve can be switched between the first position and the second position along the insertion direction.

Optionally, it also includes a first elastic member arranged between the outer sleeve and the inner sleeve along the insertion direction, and two first installation parts extending along the insertion direction are arranged inside the outer sleeve. The outer side wall of the inner sleeve is provided with two abutting columns at corresponding positions, and the first elastic member is partially inserted into the first installation groove and abuts against the abutting columns.

Optionally, the adjusting part further includes a first button and a first handle housing, the first handle housing covers the screw part and the outer sleeve, and the inner side wall of the first handle housing It is fixed with the outer sleeve, and the position of the first handle housing corresponding to the opening of the outer sleeve is provided with a first slot, and the first button is movably snapped into the first In a card slot, the first button can press against the inner sleeve to switch to the second position.

Optionally, the adjusting part further includes a second button arranged below the inner sleeve, a boss is provided on the side wall of the second button facing the inner sleeve, and the second button can be positioned along the shaft. towards the activity, and switch between the third and fourth positions:

When the second button is in the third position, the boss abuts against the peripheral wall of the inner sleeve, and the inner sleeve is in the first position; the second button is in the fourth position , the boss and the inner sleeve are axially staggered, and the inner sleeve can move radially.

Optionally, the first handle housing is provided with a second card slot at a corresponding position, and the second button can be movably locked in the second card slot along the axial direction, and also includes a second elastic member, so that A second mounting groove extending axially is provided inside the outer sleeve, and the second elastic part is partially inserted into the second mounting groove and abuts against the second button. The second elastic The component is in a compressed state, providing a restoring force for the boss to be in the third position.

Optionally, it also includes a connecting piece that fits the inner tube, the connecting piece is connected with the outer tube, the connecting piece is connected with the adjustment part in an axial limit, and can rotate in the circumferential direction. When the part moves axially relative to the screw part, it drives the connecting part to move axially, and the connecting part drives the outer tube to move axially.

Optionally, the distal end of the connecting piece is fixedly connected to the proximal end of the outer tube, and the proximal end of the connecting piece is connected to the inner side wall of the first handle housing, and one of them is provided with a limiting position extending in the circumferential direction. groove, and the other is provided with a protrusion inserted into the limiting groove, and the two realize axially limiting connection through the cooperation of the limiting groove and the protrusion.

Optionally, the screw part is provided with a guide notch extending in the axial direction, the connecting piece includes a main body sleeve part, and the main body sleeve part is provided with a radially extending abutment part, and the main body sleeve part is located at Between the inner tube and the screw part, the abutment part passes through the guide notch, and the abutment part is the protrusion.

Optionally, it also includes a limiting component arranged at the distal end or proximal end of the screw part, and a second handle housing, the second handle housing encapsulates the limiting component, and is connected with the limiting component Fixed connection.

Optionally, the inner tube includes an inner tube and a middle tube fixedly covering the inner tube, and the distal end of the inner tube passes through the middle tube and is fixed to the tip of the distal end connected, the proximal end of the inner hose passes through the middle tube and is connected with a Luer connector;

Or, it also includes a circular tube fixedly connected to the proximal end of the screw part in the axial direction, and a tail handle housing fixed to the proximal end of the circular tube, and the proximal end of the middle tube is fixed to the tail handle housing connect.

Description of drawings

Fig. 1 is a schematic structural view of a specific embodiment of an implant delivery device provided by the present invention;

Figure 2 is a partial axial sectional view of the implant delivery device of Figure 1;

Figure 3 is a partial enlarged schematic view of Figure 2;

Fig. 4 is a schematic structural view of the inner tube and the screw part of the implant delivery device in Fig. 1;

Fig. 5 is a schematic structural view of the regulating part in the implant delivery device of Fig. 1;

Fig. 6 is a schematic structural view of the outer sleeve in the adjustment part of Fig. 5;

Fig. 7 is a schematic structural view of the inner sleeve in the adjustment part of Fig. 5;

Fig. 8 is a schematic structural diagram of the first button in the adjustment part of Fig. 5;

Fig. 9 is a schematic structural diagram of the second button in the adjustment part of Fig. 5;

Fig. 10 is a state diagram of the regulating part during quick release;

Fig. 11 is a state diagram of the regulating part during slow release;

Fig. 12 is a schematic structural view of the first part of the first handle housing of the implant delivery device in Fig. 1;

Fig. 13 is a schematic structural view of the second part of the first handle housing of the implant delivery device in Fig. 1;

Fig. 14 is a schematic structural view of the connector in the implant delivery device of Fig. 1;

Fig. 15 is a schematic structural view of the outer tube in the implant delivery device of Fig. 1;

Fig. 16 is a schematic structural view of the first part of the second handle housing in the implant delivery device in Fig. 1;

Fig. 17 is a schematic structural view of the second part of the second handle housing in the implant delivery device in Fig. 1;

Fig. 18 is a schematic structural view of the circular tube in the implant delivery device of Fig. 1;

Fig. 19 is a schematic structural view of the tail handle housing in the implant delivery device of Fig. 1;

Wherein, the reference numerals in Fig. 1 to Fig. 19 are explained as follows:

1-inner tube; 11-inner hose; 12-middle tube; 2-outer tube; 21-large diameter section; 22-small diameter section; 3-screw part; 3a-guiding notch; 3'-limiting parts; 31'-limiting body; 32'-limiting wall; 33'-limiting protrusion; 4-adjustment part; 41-outer sleeve; 42-inner sleeve; - the first button; 45 - the second button; 451 - the boss; 46 - the first elastic piece; 47 - the second elastic piece; 5 - the connecting piece;

51-top; 6-first handle housing; 61-limiting groove; 6a-groove; 7-round pipe; 8-tail handle housing; 9-second handle housing.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Words such as "first" and "second" mentioned in this article are only for the convenience of describing two or more structures or components with the same or similar structure and/or function, and do not represent any order and/or importance. some special limit.

Herein, "proximal end" refers to the working end; "distal end" refers to the end implanted in the patient.

Please refer to Figures 1 to 19, the present invention provides an implant delivery device, including a delivery catheter, the delivery catheter includes an inner tube 1, as shown in Figure 4, the inner tube 1 includes an inner tube 11 and a sleeve inner tube The middle layer tube 12 of 11, the middle layer tube 12 covers the main part of the inner layer hose 11 except two ends, in other words, the far end of the inner layer hose 11 passes through the middle layer tube 12 to be connected with the tip end of the far end, and the proximal end Pass through the middle tube 12 to connect with the Luer connector. The middle tube 12 of the inner tube 1 can be made of metal or other hard materials to support the inner tube 11 .

The delivery catheter also includes an outer tube 2 that fits the inner tube 1, a loading cavity for loading the implant is provided between the distal end of the outer tube 2 and the inner tube 1, and the outer tube 2 can move axially relative to the inner tube 1, The loading chamber is closed or opened, and the implant is released when the loading chamber is opened. Wherein, as shown in FIG. 1 and FIG. 15 , the outer tube 2 includes a large-diameter section 21 and a small-diameter section 22 axially connected, the large-diameter section 21 is located at the far end of the outer tube 2, between the large-diameter section 21 and the inner tube 1 The aforementioned loading chamber is provided.

In order to realize the relative movement of the outer tube 2 and the inner tube 1 in the axial direction, the implant delivery device in this embodiment also includes a driving component for driving the outer tube 2 to move axially relative to the inner tube 1, and the driving component in this embodiment It specifically includes the screw part 3 of the sleeve inner tube 1 and the adjustment part 4 of the sleeve screw part 3. The screw part 3 and the inner tube 1 can form an annular channel extending in the axial direction, which is convenient for the outer tube 2 to pass through and adjust. Part 4 and screw part 3 can be screwed together to achieve slow axial displacement, or the adjustment part 4 and screw part 3 can be released to break away from the threaded cooperation to achieve rapid axial movement, and the adjustment part 4 will drive when the axial movement is achieved. The outer tube 2 moves axially synchronously, thereby realizing the adjustment of the moving speed of the outer tube 2 .

Specifically, as shown in Fig. 5 to Fig. 7, the adjustment part 4 includes an outer sleeve 41 and an inner sleeve 42, the peripheral wall of the outer sleeve 41 is provided with an opening matching the inner sleeve 42, and the inner sleeve 42 passes through the The opening is inserted inside the outer sleeve 41, the insertion direction is radial, and the inner wall of the inner sleeve 42 is provided with an internal thread a at a position opposite to the opening. In FIG. 7, the bottom wall of the inner sleeve 42 is provided with The internal thread a matches the external thread of the screw part 3 . The inner sleeve 42 can move along the insertion direction, and switch between the first position and the second position. In the first position, the internal thread a of the bottom wall of the inner sleeve 42 is engaged with the external thread of the screw part 3, as shown in FIG. 5 6. It is understood that after the inner sleeve 42 is pressed down, the inner thread a of the bottom wall of the inner sleeve 42 is separated from the outer thread of the screw part 3, so that the adjustment part 4 is in the second position.

In this way, the inner sleeve 42 is in the first position, and the inner thread a of the inner wall of the inner sleeve 42 is engaged with the outer thread of the screw part 3. At this time, the adjustment part 4 can only rotate, and the operator can rotate the adjustment part 4, and the adjustment part 4 Along the axial direction of the screw part 3, it gradually moves toward the proximal/distal end, and then drives the outer tube 2 to slowly move toward the proximal/distal end, so as to realize the slow delivery of the implant; when it is necessary to realize the rapid delivery of the implant , the operator can apply a compressive force to the inner sleeve 42, and the inner sleeve 42 moves radially toward the inside of the outer sleeve 41 under the action of the compressive force, the inner sleeve 42 switches to the second position, and the inner sleeve 42 The internal thread a of the inner wall is separated from the external thread of the screw part 3. At this time, the operator can control the adjusting part 4 to move rapidly to the proximal/distal end along the axial direction of the screw part 3, and then drive the outer tube 2 to quickly move to the proximal/distal end. remote movement.

As shown in Figure 5-7, in order to ensure that the adjustment part 4 is easy to return from the second position to the first position after the external force is removed, the outer sleeve 41 is provided with two first installation grooves extending along the direction of insertion. The outer peripheral wall of the sleeve 42 is correspondingly provided with two props 43, and also includes two first elastic members 46, and the two first elastic members 46 are inserted into the corresponding first installation grooves one by one, and are connected to the corresponding sides. and the first elastic member 46 is in a compressed energy storage state, so that after the external force pressing the inner sleeve 42 is removed, under the action of the first elastic member 46, the inner sleeve 42 will pop out to the first position again, Make its internal thread a cooperate with the external thread of the screw part 3 again. It can be known that the abutment post 43 is arranged on the outer sleeve 41 , and the first installation groove is also arranged on the inner sleeve 42 . In addition, in this embodiment, the first elastic member 46 is set to abut against the supporting post 43 on the corresponding side, that is, the two may not be connected. Since the first elastic member 46 is always in a compressed state, the first elastic member 46 will The abutting relationship with the abutment column 43 is always maintained; of course, it is also feasible to connect the two fixedly.

In addition, since the first elastic member 46 is provided between the inner sleeve 42 and the outer sleeve 41, and there is no other locking structure, when it is necessary to realize the rapid delivery of the implant, the operator needs to continuously apply a pressing force to maintain the implant. The disengagement state of the inner sleeve 42 and the screw part 3, this setting can effectively avoid the occurrence of misoperation and ensure the safety of the operation; Return to the engagement state with the screw part 3, simplifying the operation process. Of course, in addition to the implementation of this embodiment, a first locking unit and a second locking unit may also be provided. When the operator switches the inner sleeve 42 to the first position, the inner sleeve 42 and the outer sleeve 41 pass through The first locking unit is locked, and the internal thread a remains engaged with the external thread of the screw part 3; when the operator switches the inner sleeve 42 to the second position, the inner sleeve 42 and the outer sleeve 41 are locked by the second locking unit, The internal thread a maintains a disengagement state from the external thread of the screw part 3; at this time, the first elastic member 46 and related structures can be canceled, and this solution can also achieve the technical effect of switching the inner sleeve 42 between the first position and the second position .

At the same time, the adjustment part 4 is not limited to the realization of the first position and the second position switching through the radial insertion of the inner sleeve 42 and the outer sleeve 41 in this embodiment, nor is it limited to the partial position of the inner sleeve 42 Set internal thread a. For example, it can also be set as follows: the inner side wall of the inner sleeve 42 is provided with a circle of internal thread a, the inner sleeve 42 is formed by combining two half-tubes, and the two half-tubes are connected by a clamping method, and the two half-tubes are pinched and clamped. Open to disengage from the screw part 3, loosen the clip, and the two half cylinders are joined together to threadably engage with the screw part 3. For another example, the adjustment part 4 only includes the outer sleeve 41, and its inner side wall is provided with a mounting groove, and a fitting block is arranged in the mounting groove, and an internal thread is arranged on the fitting block. Protrude out of the installation groove and engage with the thread of the screw part 3. It can be seen that there are many ways to realize the switching between the first position and the second position of the adjustment part 4, so as to realize the adjustment of the moving speed of the adjustment part 4 and realize the fast and slow delivery of the implant.

Further, as shown in Fig. 1, Fig. 2 and Fig. 5, the adjustment part 4 also includes a first button 44, and the first handle housing 6 of the movable sleeve screw part 3 and the outer sleeve 41, and the first handle housing 6 The inner sidewall of the outer sleeve 41 is relatively fixedly arranged, and may also be an integral structure with the outer sleeve 41 . The first handle housing 6 is provided with a first card slot at a position corresponding to the inner sleeve 42 , the first button 44 can be movably locked in the first card slot in the radial direction, and the first button 44 faces the inner sleeve 42 One end of the inner sleeve abuts against the inner sleeve 42 to push the inner sleeve 42 to move along the insertion direction, and perform the above-mentioned operation of pressing the inner sleeve 42 . The first button 44 is provided to facilitate the operation of the inner sleeve 42 .

Obviously, whether the first handle housing 6 and the first button 44 are provided will not affect the control of the working position of the adjustment part 4. In practical applications, the first handle housing 6 and the first button 44 may not be provided. , the operator can directly press or release the inner sleeve 42 to switch the working position of the inner sleeve 42 . Of course, the first handle housing 6 is provided in this embodiment. On the one hand, the screw part 3 and the adjustment part 4 are encapsulated inside, so that the overall structure of the delivery device becomes more tidy, and the screw part 3 and the adjustment part 4 are not damaged. , the transmission is smoother; on the other hand, it is convenient to snap the first button 44 into the first slot, and switch the working position of the inner sleeve 42 through the first button 44, so that the control of the adjustment part 4 is more convenient, It is more practical and is a more preferred solution.

In this embodiment, the outer surface of the first button 44 adopts non-slip setting, and the appearance of the second handle housing 9 and the first handle housing 6 conforms to ergonomics and is easy to operate. A part of the outer peripheral wall of the inner sleeve 42 is arc-shaped, and the other part is polygonal. The internal thread a is arranged on the inner side of the arc-shaped peripheral wall, and the first button 44 abuts against the polygonal peripheral wall. Of course, the specific shape of the inner sleeve 42 is not limited to the above-mentioned form.

It is worth noting that when the adjustment part 4 and the screw part 3 achieve axial movement through thread engagement and rotation, if the adjustment part 4 directly drives the outer tube 2 to move, the outer tube 2 will also rotate. In order to further ensure that the outer tube 2 only moves along the Axial translation without rotation ensures the stability of the cooperation between the outer tube 2 and the inner tube 1 .

Specifically, as shown in Fig. 2 and Fig. 14, the connecting piece 5 is sleeved on the inner tube 1, and the distal end of the connecting piece 5 is fixedly connected to the proximal end of the outer tube 2, and the proximal end of the connecting piece 5 is provided with a radially extending abutment. The top 51 and the abutting top 51 are used to achieve an axial limit connection with the adjustment part 4, so that the adjustment part 4 will not drive the abutment top 51 to rotate when it rotates, but the axial displacement caused by the rotation will be transmitted to the outer tube through the abutment top 51 2, thereby driving the outer tube 2 to move axially.

In Fig. 14, the connecting piece 5 includes a main body sleeve portion, and the abutting portion 51 is arranged at the proximal end of the main body sleeve portion. In order to reduce space occupation, the main body sleeve portion is sleeved between the inner tube 1 and the screw portion 3. At this time In order to ensure that the abutting top 51 can be connected with the axial limit of the adjustment part 4 without interfering with the thread fit between the adjustment part 4 and the screw part 3, as shown in Figure 4, this solution is specially provided with a proximal opening on the peripheral wall of the screw part 3 , and the guiding notch 3a extending to the distal end, the abutment top 51 passes through the guiding notch 3a in the radial direction.

In addition, the connecting piece 5 specifically establishes an axial limit connection with the first handle housing 6 of the adjustment part 4. The inner side wall of the first handle housing 6 is provided with two limit portions extending in the circumferential direction. There is a predetermined distance along the axial direction of the first handle housing 6, and the two limiting parts enclose to form a limiting groove 61, and the abutting top 51 is inserted into the limiting groove 61, so when the first handle housing 6 rotates , the connecting piece 5 will not rotate accordingly, and when the first handle housing 6 moves in the axial direction, the two stoppers can abut against the corresponding end walls of the abutment top 51, pushing the abutment top 51 to move in the axial direction, Further, the outer tube 2 is driven to move in the axial direction. Specifically, when the first handle housing 6 moves proximally in the axial direction, the limiting portion of the limiting groove 61 near the distal end pushes against the distal end wall of the top 51, so that the connecting piece 5 and the outer tube 2 move toward the proximal end. When the first handle housing 6 moves axially to the far end, the stop portion near the proximal end in the stop slot pushes against the proximal end wall of the top 51, so that the connecting piece 5 and the outer tube 2 move far away. terminal moves.

Of course, it is also feasible to set a limiting groove at the proximal end of the connecting piece 5 and set it against the top of the inner peripheral wall of the first handle housing 6 , so as to achieve the above-mentioned technical effect.

It can be understood that the connecting piece 5 is not limited to such an arrangement, as long as it is connected with the outer tube 2 and connected with the adjustment part 4 in an axial limit, the rotation of the adjustment part 4 can be converted into a linear axial movement, and the rotation of the outer tube 2 can be avoided. . For example, the connecting piece 5 can also be set as a sleeve-shaped structure, the distal end is fixedly connected with the proximal end of the outer tube 2, and the proximal end is connected with the outer sleeve 41, and can rotate relatively with the outer sleeve 41, so that the outer sleeve 41 When rotating axially, the connecting piece 5 and the outer tube 2 will not rotate accordingly. At this time, the connecting piece 5 and the outer sleeve 41 can be regarded as an integral structure, which is a part of the adjusting part 4 . The sleeve-shaped connecting piece 5 can cover the inner tube 1 and connect with the outer tube 2, so that the connecting piece 5 can transmit force more evenly.

As mentioned above, when the adjustment part 4 is rotated, the screw part 3 is relatively stationary, so that the adjustment part 4 only generates an axial displacement relative to the screw part 3 and the inner tube 1 when the adjustment part 4 rotates. The screw part 3 can be connected with other fixing components, for example, it can be connected with the inner tube 1, and a connection structure is arranged at the proximal end of the screw part 3 and the inner tube 1, so that the screw part 3 is fixedly connected with the inner tube 1, thereby realizing the fixing of the screw part 3 technical effect; it can also be held and fixed by the operator. This embodiment is held and fixed by the operator, specifically the second handle housing 9 fixed with the screw part 3 is set, and the operator holds the second handle housing 9 tightly to relatively Fix the screw part 3.

As shown in Figure 3 and Figure 4, the distal end of the screw part 3 is provided with a limiting part 3', and the limiting part 3' includes a limiting body 31' axially connected with the screw part 3, and the limiting body 31' can be connected with the screw Part 3 is an integrally formed structure, or adopts a split structure, and then fixedly connected. The outer peripheral wall of the limiting body 31' is provided with a first limiting component and a second limiting component. The first limiting component includes at least one To the surrounding limiting wall 32', this embodiment is provided with two limiting walls 32', and the two limiting walls 32' have a predetermined gap in the axial direction, and the second limiting component includes at least one extending in the axial direction. The limiting protrusion 33', this embodiment is provided with two limiting protrusions 33', and the two limiting protrusions 33' are arranged opposite to each other. The second handle housing 9 encapsulates the position-limiting component 3 ′, and the inner wall of the second handle housing 9 is provided with a plurality of annular position-limiting parts, and the plurality of position-limiting parts are distributed along the axial direction, wherein two position-limiting parts encircle a position-limiting Groove, the two limiting walls 32' of the limiting part 3' are located in the limiting groove, and are opposed to the limiting parts on the corresponding side, so that the second handle housing 9 is connected to the limiting part 3' and the screw part 3 Axially fixed, and the rest of the plurality of limiters clamp the limit protrusion 33' to realize the circumferential fixation of the second handle housing 9, the limit member 3' and the screw part 3. In this way, the second handle housing 9 is actually fixed together with the limiting component 3 ′ and the screw portion 3 , and the fixing of the limiting component 3 ′ and the screw portion 3 can be realized by fixing the second handle housing 9 .

The conveying device of this embodiment adopts the above structure. In the natural state, the inner sleeve 42 is at the outermost position by the restoring force of the first elastic member 46, that is, the first position. At this time, the adjustment part 4 can only rotate, and the operator can hold the second handle housing 9 tightly, and at the same time rotate the first handle housing 6 to drive the adjustment part 4 to rotate, and the adjustment part 4 rotates along the screw part. The axial direction of 3 gradually moves toward the proximal/distal end, and the connecting piece 5 then drives the outer tube 2 to slowly move toward the proximal/distal end to realize the slow delivery of the implant; when it is necessary to realize the rapid delivery of the implant, The operator can press the first button 44 to apply a compressive force to the inner sleeve 42. Under the action of the compressive force, the inner sleeve 42 moves toward the inside of the outer sleeve 41 along the inserting direction, and the two ends of the inner sleeve 42 resist The column 43 compresses the first elastic member 46, and the inner sleeve 42 switches to the innermost position, that is, the second position. The internal thread a of the inner wall of the inner sleeve 42 is separated from the external thread of the screw part 3. At this time, the operator can hold Tighten the second handle housing 9, and at the same time drive the first handle housing 6 to move rapidly along the axial direction of the screw part 3, so that the adjustment part 4 quickly moves to the proximal end/distal end along the axial direction of the screw part 3, and the connecting part 5 then Drive the outer tube 2 to move quickly to the proximal end/distal end.

Therefore, the present invention realizes the adjustment of the moving speed of the adjusting part 4 by controlling the engagement or disengagement of the inner sleeve 42 and the external thread of the screw part 3, and then realizes fast and slow delivery of the implant, which satisfies the needs of the implant. Precise release can shorten the operation time and improve work efficiency, and the structure is simple and the production cost is reduced.

It can be understood that the limiting part 3' can be arranged at the distal end of the screw part 3, and can also be arranged at the proximal end of the screw part 3. When the limiting part 3' is arranged at the proximal end of the screw part 3, the first handle shell The body 6 is close to the far end, and the second handle housing 2 is close to the proximal end. The operation method is the same as above, and will not be repeated here.

In addition, the above-mentioned middle layer tube 12 supports the inner layer hose 11, which is mainly used to support the axial movement of the connecting piece 5 inside the screw part 3. Therefore, the length of the middle layer tube 12 covering the inner layer hose 11 should be at least Covers the movement area of the connecting piece 5.

Please continue to refer to FIG. 2, FIG. 3, and FIG. 9-FIG. 11, the implant delivery device of this embodiment also includes a locking portion, the locking portion includes a second button 45, and a second elastic member 47, and the second button 45 is axially It is arranged between the inner sleeve 42 and the outer sleeve 41, and at a position opposite to the opening, the second button 45 is provided with a boss 451 facing the side wall of the inner sleeve 42, and the first handle housing 6 is positioned on the second button 45. The corresponding position is provided with a second card slot, the second button 45 is clamped in the second card slot, the inside of the outer sleeve 41 is provided with a second installation slot extending in the axial direction at the corresponding position of the second button 45, and the second elastic Part 47 is inserted in the second mounting groove, and is against the end wall of the boss 451 of the second button 45, the second elastic member 47 is always in a compressed state, and the second button 45 can be moved along the axis in the second slot. To move, and switch between the third position and the fourth position: in the third position, the boss 451 is against the lower end of the peripheral wall of the inner sleeve 42, and the adjustment part 4 can only be in the first position and cannot move in the radial direction, such as As shown in FIG. 11 ; in the fourth position, the boss 451 and the inner sleeve 42 are axially staggered, and the adjusting part 4 can move in the radial direction, as shown in FIG. 10 .

In this way, when the implant needs to be released/recovered quickly, only by continuously pressing the second button 45 and compressing the second elastic member 47 to switch the second button 45 to the fourth position can the boss 451 be staggered with the inner sleeve 42 At this time, the first button 44 can be pressed again to switch the adjustment part 4 to the second position; and when the pressure applied to the first button 44 and the second button 45 is released, the second button 45 will be in the second elastic Return to the third position under the restoring force of the member 47, the first button 44 returns to the first position under the restoring force of the first elastic member 46, and the boss 451 is against the inner sleeve 42. When the first button 44 is pressed, the adjustment part 4 can only be in the first position and cannot move in the radial direction.

Of course, even if the second button 45 is not provided, it will not affect the adjustment of the adjustment part 4. In this embodiment, by adding a locking part, the occurrence of misoperation can be further avoided and the safety of operation can be ensured, which is a more preferable solution.

In this embodiment, the second elastic member 47 is arranged to abut against the end wall of the boss 451, that is, the two may not be connected. Since the second elastic member 47 is always in a compressed state, the second elastic member 47 will always maintain The abutting relationship with the boss 451; of course, it is also feasible to connect the two fixedly.

In this embodiment, both the first elastic member 46 and the second elastic member 47 are coil springs. In practical applications, other elastic bodies, such as elastic balls, can also be used, which are not limited here.

Please refer to Fig. 12 and Fig. 13. In this embodiment, the first handle housing 6 is formed by the cooperation of the left half-shell and the right half-shell, and the first card slot is also provided on the left half-shell and the right half-shell respectively. The groove 6a of the body is spliced together, which is convenient for installation.

Please refer to Fig. 1, Fig. 2, Fig. 18 and Fig. 19, the implant delivery device of this embodiment also includes a round tube 7 fixed on the proximal end of the screw part 3, and a tail handle housing fixed on the proximal end of the round tube 7 8. The round tube 7 plays the role of fixing and supporting the screw part 3. The luer connector is fixed on the tail handle housing 8 and connected with the inner hose 11 for injecting liquid, emptying the liquid injection channel or guide wire pass.

In addition, as shown in Fig. 16 and Fig. 17, the second handle housing 9 is also composed of two parts, which is convenient for installation.

The implant delivery device provided by the present invention has been described in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The descriptions of the above embodiments are only used to help understand the methods and methods of the present invention. its core idea. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (11)

1. An implant delivery device is characterized by comprising a delivery catheter, wherein the delivery catheter comprises an inner tube (1) and an outer tube (2) which can axially and movably sleeve the inner tube (1), the outer tube (2) comprises a large-diameter section (21) and a small-diameter section (22) which are axially connected, the large-diameter section (21) is positioned at the far end of the outer tube (2), and a loading cavity is arranged between the large-diameter section (21) and the inner tube (1);

still include the suit screw rod portion (3) of inner tube (1), and the suit regulation part (4) of screw rod portion (3), regulation part (4) can drive outer tube (2) are along axial displacement, the inside wall of regulation part (4) be provided with screw rod portion (3) external screw thread assorted internal thread (a), just regulation part (4) can be in primary importance and second place switching:

when the adjusting part (4) is at a first position, the internal thread (a) is meshed with the screw part (3); when the adjusting part (4) is at the second position, the internal thread (a) is separated from the screw part (3).

2. The implant delivery device according to claim 1, wherein the adjustment portion (4) includes an outer sleeve (41) and an inner sleeve (42), a peripheral wall of the outer sleeve (41) is provided with an opening that matches the inner sleeve (42), the inner sleeve (42) is inserted inside the outer sleeve (41), an inner side wall of the inner sleeve (42) is provided with the internal thread (a) at a position opposite to the opening, and the inner sleeve (42) is switchable between the first position and the second position in an insertion direction.

3. The implant delivery device according to claim 2, further comprising a first elastic member (46) disposed between the outer sleeve (41) and the inner sleeve (42) along the insertion direction, wherein two first mounting grooves extending along the insertion direction are disposed inside the outer sleeve (41), two abutting columns (43) are disposed at corresponding positions on the outer side wall of the inner sleeve (42), and the first elastic member (46) is partially inserted into the first mounting grooves and abuts against the abutting columns (43).

4. The implant delivery device according to claim 2, wherein the adjustment part (4) further comprises a first button (44) and a first handle housing (6), the first handle housing (6) is sleeved on the screw part (3) and the outer sleeve (41), the inner side wall of the first handle housing (6) is fixed with the outer sleeve (41), a first clamping groove is arranged at the position of the first handle housing (6) corresponding to the opening of the outer sleeve (41), the first button (44) is movably clamped in the first clamping groove, and the first button (44) can press the inner sleeve (42) to switch to the second position.

5. Implant delivery device according to claim 4, characterized in that the adjustment part (4) further comprises a second button (45), which second button (45) is arranged between the inner sleeve (42) and the outer sleeve (41) in a position opposite to the opening, the side wall of the second button (45) facing the inner sleeve (42) being provided with a projection (451), which second button (45) is axially movable and is switchable between a third position and a fourth position:

when the second button (45) is at the third position, the boss (451) is abutted against the peripheral wall of the inner sleeve (42), and the inner sleeve (42) can only be at the first position; when the second button (45) is in the fourth position, the boss (451) is axially offset from the inner sleeve (42), and the inner sleeve (42) is radially movable.

6. Implant delivery device according to claim 5, characterized in that the first handle housing (6) is provided at a corresponding position with a second snap groove, in which the second button (45) is axially movably snap-fitted, and further comprising a second elastic element (47), in which the outer sleeve (41) is provided with a second mounting groove extending in the axial direction, and in which the second elastic element (47) is partially inserted and abuts against the second button (45), and in which the second elastic element (47) is in a compressed state, providing a restoring force of the boss (451) in the third position.

7. The implant delivery device according to claim 4, further comprising a connecting member (5) sleeving the inner tube (1), wherein the connecting member (5) is connected with the outer tube (2), the connecting member (5) is in axial limit connection with the adjusting portion (4), the circumferential direction is rotatable, the adjusting portion (4) drives the connecting member (5) to axially move relative to the screw portion (3) when moving axially, and the connecting member (5) drives the outer tube (2) to axially move.

8. The implant delivery device according to claim 7, wherein the distal end of the connecting member (5) is fixedly connected with the proximal end of the outer tube (2), the proximal end of the connecting member (5) is fixedly connected with the inner side wall of the first handle housing (6), one is provided with a limiting groove extending along the circumferential direction, the other is provided with a projection inserted into the limiting groove, and the limiting groove and the projection are matched to realize axial limiting connection.

9. The implant delivery device according to claim 8, wherein the screw portion (3) is provided with a guide notch (3 a) extending in an axial direction, the connector (5) comprises a main body sleeve portion provided with a radially extending abutment portion (51) located between the inner tube (1) and the screw portion (3), the abutment portion (51) passing through the guide notch (3 a), the abutment portion (51) being the protrusion.

10. The implant delivery device according to any one of claims 1 to 9, further comprising a stop member (3 ') disposed at a distal or proximal end of the screw portion (3), and a second handle housing (9), the second handle housing (9) enclosing the stop member (3 ') and being fixedly connected to the stop member (3 ').

11. The implant delivery device according to any one of claims 1 to 9, wherein the inner tube (1) comprises an inner hose (11) and a middle hose (12) fixedly sleeved on the inner hose (11), the distal end of the inner hose (11) penetrates out of the middle hose (12) and is fixedly connected with a distal tip end, and the proximal end of the inner hose (11) penetrates out of the middle hose (12) and is connected with a luer connector;

or, still include along axial fixed connect in pipe (7) of screw rod portion (3) near-end, and be fixed in tail handle casing (8) of pipe (7) near-end, the near-end of intermediate layer pipe (12) with tail handle casing (8) fixed connection.

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