CN118217055A

CN118217055A - Conveyor and conveying system

Info

Publication number: CN118217055A
Application number: CN202211649072.XA
Authority: CN
Inventors: 彭峰
Original assignee: Shenzhen Jianxin Medical Technology Co ltd
Current assignee: Shenzhen Jianxin Medical Technology Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2024-06-21
Also published as: WO2024131492A1

Abstract

The invention relates to a conveyor and a conveying system, wherein the conveyor comprises: a core tube assembly; the sheath assembly is sleeved outside the core tube assembly, and a first accommodating part is defined between the distal end of the sheath assembly and the core tube assembly along the circumferential direction; an inner rod disposed inside the core tube assembly, a distal end of the inner rod extending out of a distal end of the core tube assembly; the accommodating head is connected to the distal end of the inner rod, the accommodating head and the distal end of the outer sheath assembly are axially arranged at intervals, and the proximal end of the accommodating head is provided with a second accommodating part. The present invention aims to provide a conveyor that operates directly and quickly.

Description

Conveyor and conveying system

Technical Field

The invention relates to the technical field of interventional medical equipment, in particular to a conveyor and a conveying system.

Background

The heart valve refers to a valve between the atria and ventricles or between the ventricles and arteries, which includes the mitral valve (located between the left ventricle and the left atrium), the tricuspid valve (located between the right ventricle and the right atrium), the pulmonary valve (located at the right ventricular outlet), and the aortic valve (located at the left ventricular outlet).

Currently, there are two main treatments for heart valve dysfunction. Taking the aortic valve as an example, valve replacement under surgical direct vision and transcatheter aortic valve replacement can be classified. Under the condition of external circulation, the surgical replacement needs to cut the aorta of the patient, remove the aortic valve of the patient, implant a prosthetic valve, suture the implanted valve on the aortic valve ring, stop circulation finally, close the chest and finish the operation; transcatheter replacement is a procedure in which a valve is mounted in a crimped state on the end of a catheter in the presence of radiation to the implantation site and expanded to its functional size to replace the diseased heart valve.

However, in either method, there are realistic problems such as long extracorporeal circulation time of the surgical operation and high risk of the operation; transcatheter surgery is a procedure in a non-direct view, in which the prosthetic valve is not visually visible, and it is inconvenient to position the prosthetic valve directly and quickly to the treatment site.

Disclosure of Invention

In view of the above, the present invention aims to provide a conveyor that can be operated directly and quickly.

The aim is achieved by the following technical scheme:

According to a first aspect of the present invention, there is provided a conveyor for conveying medical devices, the conveyor comprising:

a core tube assembly;

The sheath assembly is sleeved outside the core tube assembly, and a first accommodating part is defined between the distal end of the sheath assembly and the core tube assembly along the circumferential direction;

An inner rod disposed inside the core tube assembly, a distal end of the inner rod passing out of a distal end of the core tube assembly;

the accommodating head is connected to the distal end of the inner rod, the accommodating head and the distal end of the outer sheath assembly are axially arranged at intervals, and the proximal end of the accommodating head is provided with a second accommodating part.

Further, the conveyor further includes: a first drive assembly coupled to the sheath assembly, the first drive assembly for driving the sheath assembly proximally relative to the core tube assembly to release the proximal end of the medical device; and/or a second drive assembly coupled to the proximal end of the inner rod for driving the inner rod axially relative to the core tube assembly to push the containment head away from the core tube assembly and release the distal end of the medical device.

Further, the first driving assembly includes: a first elastic member connected to the outer sheath assembly in a compressed state; a control member cooperating with a proximal stop of the sheath assembly such that the control member is switchable between a first position and a second position; in the first position, the proximal end of the sheath assembly abuts against the control member, and the first elastic member is in a compressed state to apply an elastic force to the sheath assembly toward the proximal end side; in the second position, the proximal end of the sheath assembly is separated from the control member, and the first resilient member extends and drives the sheath assembly proximally.

Further, the outer sheath assembly includes: an outer sheath; the matching piece is sleeved at the proximal end part of the outer sheath tube and comprises a first stop part positioned at the distal end and a second stop part positioned at the proximal end; wherein the proximal end of the first elastic element in a compressed state abuts against the first stop portion; the control piece is matched with the second stop part in a stop mode.

Further, the fitting comprises a first step structure, a second step structure and a third step structure, wherein the first step structure, the second step structure and the third step structure are sequentially arranged from the distal end to the proximal end, the diameters of the first step structure are gradually decreased, the distal end face of the first step structure is provided with a first stop part, the second stop part is a protruding structure arranged on the peripheral face of the proximal end of the third step structure, and the proximal end of the sheath tube penetrates into the fitting from the distal end of the fitting and is fixedly connected with the fitting.

Further, the proximal end of the conveyor comprises a handle assembly, the first driving assembly is arranged in the handle assembly, the handle assembly comprises a shell, a first protruding rib extending along the circumferential direction is arranged on the inner wall of the shell, the first protruding rib is located at the distal end of the control member, the matching piece penetrates through the first protruding rib and can move axially relative to the first protruding rib, when the matching piece moves proximally, the second ladder structure can be abutted to the distal end of the first protruding rib, and when the matching piece moves distally, the second stop portion can be abutted to the proximal end of the first protruding rib.

Further, one of the first convex rib and the third step structure is provided with a first guide groove, the other one of the first convex rib and the third step structure is provided with a first guide convex rib which is in sliding fit with the first guide groove, and the first guide convex rib and the first guide groove extend along the axial direction.

Further, the control piece is provided with a first guide hole, the proximal end of the outer sheath component can axially penetrate through the first guide hole, the inner wall of the first guide hole is provided with a boss, and the boss is matched with the proximal end stop of the outer sheath component; the control piece is also provided with a second elastic piece, and the second elastic piece is in a compressed state and drives the control piece to move vertically and axially, so that the proximal end of the outer sheath component abuts against the boss.

Further, the second driving assembly includes: the screw rod is fixedly connected with the proximal end of the inner rod; and the knob is rotatably matched with the thread of the screw rod and can drive the screw rod to move along the axial direction.

Further, the conveyor further includes: the guide piece comprises a connecting hole and a second guide hole which extend along the axial direction and are sequentially arranged and communicated, the connecting hole is located at the far end relative to the second guide hole, the near end of the core tube assembly is sleeved and fixed in the connecting hole, and the far end of the screw rod extends into the second guide hole.

Further, the screw is provided with a second guide groove extending along the axial direction; the inner wall of the second guide hole is provided with a second guide convex rib which is in sliding fit with the second guide groove.

Further, the core tube assembly comprises: a core tube; the fixing piece is connected with the distal end of the core tube; the medical device comprises a fixing piece, a sheath assembly, a first containing part, a second containing part, a plurality of tooth-shaped protrusions and a connecting rod, wherein the first containing part is defined between the fixing piece and the distal end of the sheath assembly along the circumferential direction, the tooth-shaped protrusions are arranged along the circumferential direction of the fixing piece at intervals in sequence and are used for hooking and connecting with the proximal end of the medical device.

According to the conveyor, the first accommodating part is defined between the distal end of the outer sheath component and the core tube component, the second accommodating part is arranged at the proximal end of the accommodating head, the accommodating head and the distal end of the outer sheath component are axially arranged at intervals, so that two ends of a medical instrument are respectively accommodated in the first accommodating part and the second accommodating part, and the main body part of the medical instrument is positioned between the accommodating head and the core tube component and is not accommodated in the outer sheath component. The advantages of surgical replacement, such as the accuracy of the procedure, on the one hand, and the time required for current surgical procedures, on the other hand, can be inherited over conventional surgical replacement.

According to a second aspect of the present invention, there is also provided a conveying system, including: a conveyor as described in the first aspect; the medical instrument, the proximal end of medical instrument is acceptd in first acceptd portion, the distal end of medical instrument acceptd in second acceptd portion.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

Fig. 1 schematically shows a schematic structural view of a conveyor according to an embodiment of the invention;

FIG. 2 schematically shows a schematic cross-sectional view of the portion A-A of FIG. 1;

Fig. 3 schematically shows a schematic cross-sectional structure of a receiving head according to an embodiment of the present invention;

FIG. 4 schematically illustrates a schematic exploded view of a conveyor according to an embodiment of the invention;

fig. 5 schematically shows a structural schematic of a control member according to an embodiment of the present invention;

FIG. 6 schematically illustrates a schematic view of the relative positions of the control member and the mating member in a locked state according to an embodiment of the present invention;

FIG. 7 schematically illustrates a relative position of a control member and a mating member in an unlocked state according to an embodiment of the present invention;

FIG. 8 schematically shows a schematic structural view of a fitting according to an embodiment of the present invention;

fig. 9 schematically shows a schematic cross-sectional structure of a fitting according to an embodiment of the present invention;

Fig. 10 schematically illustrates an enlarged cross-sectional structure of a portion a of fig. 2 according to an embodiment of the present invention.

Fig. 11 schematically shows a schematic view of a second housing according to an embodiment of the invention;

Fig. 12 schematically shows a schematic view of a first housing according to an embodiment of the invention;

Fig. 13 schematically illustrates a schematic view of a second housing from a front view perspective according to an embodiment of the present invention;

Fig. 14 schematically shows a schematic cross-sectional structure of a guide according to an embodiment of the present invention;

fig. 15 schematically shows a structural schematic of a screw according to an embodiment of the present invention;

FIG. 16 schematically illustrates a guide mated with a screw in accordance with an embodiment of the present invention;

Fig. 17 schematically shows a structural schematic of a fixing member and an inner rod according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

It should be noted that "distal end" and "proximal end" are used as terms of orientation, which are terms commonly used in the field of interventional medical devices, where "distal end" refers to an end that is away from an operator during a surgical procedure and "proximal end" refers to an end that is near the operator during a surgical procedure. Axial, refers to a direction parallel to the line connecting the distal center and the proximal center of the medical instrument; radial refers to a direction perpendicular to the axial direction.

Referring to fig. 1 and 2, a conveyor 100 is provided according to an embodiment of the present invention, the conveyor 100 being used for conveying medical devices. Wherein the medical apparatus can be a valve, a vascular stent, an occluder, etc. In this embodiment a valve is taken as an example.

The conveyor 100 includes a handle assembly 10, an outer sheath assembly 20, a core tube assembly 30, a containment head 40, and an inner rod 50. Specifically, the proximal end of the core tube assembly 30 is connected to the handle assembly 10, the outer sheath assembly 20 is sleeved outside the core tube assembly 30, a first accommodating portion 201 is defined between the distal end of the outer sheath assembly 20 and the core tube assembly 30 along the circumferential direction, the inner rod 50 is disposed inside the core tube assembly 30, the distal end of the inner rod 50 penetrates out of the distal end of the core tube assembly 30, the accommodating head 40 is connected to the distal end of the inner rod 50, the accommodating head 40 is axially spaced from the core tube assembly 30, a second accommodating portion 401 is disposed at the distal end of the accommodating head 40, the proximal end of the valve 2001 is accommodated in the first accommodating portion 201, and the distal end of the valve 2001 is accommodated in the second accommodating portion 401. In other embodiments, the handle assembly 10 may not be provided, and the valve 2001 may be accommodated and released by manually fixing the proximal end of the outer sheath assembly 20, the proximal end of the core tube assembly 30, and the proximal end of the inner rod 50, thereby manually controlling the positional relationship of the outer sheath assembly 20, the core tube assembly 30, and the inner rod 50.

It should be noted that, the two ends of the valve 2001 are respectively accommodated in the first accommodating portion 201 and the second accommodating portion 401, and the main body portion of the valve is located between the accommodating head 40 and the core tube assembly 30, so, compared with the process of accommodating the valve into the catheter entirely, the conveyor 100 only accommodates the end portion of the valve without completely compressing the valve and accommodating the valve into the conveyor 100, the middle portion of the valve 2001 is exposed outside the conveyor, the middle portion of the valve 2001 can be conveniently and directly and quickly positioned on the annulus of the treatment site through surgical exposure, and the inner space of the outer sheath assembly 20 and the accommodating head 40 occupied by the valve is smaller, so that the diameter size of the outer sheath assembly 20 and the accommodating head 40 is reduced, and the intervention of the valve is easier.

It is also emphasized that since the valve is compressed and received in the transporter 100 at only two ends, the release process is more rapid when the valve is released.

It will be appreciated that the valve has a large amount of deformation during expansion from a fully compressed state to a fully extended state due to the self-expanding nature of the valve, such that the position of the valve after full deployment will vary significantly from the compressed state, and that the position of the valve after release is not fully controllable due to the need for the valve deployment to be decoupled from the constraint of the conveyor 100, such that the position of the valve after release is offset from the ideal position. In the embodiment of the present invention, the proximal end and the distal end of the valve are compressed and accommodated in the transporter 100, and the middle area between the proximal end and the distal end of the valve is in the semi-expanded state, which is equivalent to the state that the valve is already in the partially semi-expanded state before the transporter 100 releases the valve, so that the deformation of the valve from the partially semi-expanded state to the fully expanded state is smaller than the deformation of the valve from the fully compressed state to the fully expanded state, and therefore, the position change of the valve after the valve is smaller, and the position accuracy of the valve after the valve is released and expanded is higher.

Specifically, the handle assembly 10 includes a first housing 11 and a second housing 12, both of which are detachably connected such that the first housing 11 and the second housing 12 constitute a hollow tubular structure and a receiving chamber 101 is formed between the first housing 11 and the second housing 12. In an exemplary embodiment, as shown in fig. 12 and 13, the first housing 11 is provided with a plurality of first buckles 111, the second housing 12 is provided with a first clamping groove 123 clamped with the first buckles 111, and the first housing 11 and the second housing 12 are clamped and connected by inserting the first buckles 111 into the first clamping groove 123. The distal ends of the first housing 11 and the second housing 12 form an opening through which the proximal ends of the core tube assembly 30, the outer sheath assembly 20 and the inner rod 50 can extend into the receiving cavity 101. In other embodiments, the first housing 11 and the second housing 12 are fixed by screws, glue, or other common methods, and may be an integral structure.

In some embodiments of the present invention, as shown in fig. 2, the conveyor 100 further includes a first drive assembly 60 and a second drive assembly 70. A first drive assembly 60 is provided in the receiving chamber 101 and is connected to the outer sheath assembly 20, the first drive assembly 60 being capable of driving the outer sheath assembly 20 proximally relative to the core tube assembly 30 to release the proximal end of the valve. A second drive assembly 70 is movably disposed on the handle assembly 10 and is coupled to the proximal end of the inner rod 50, the second drive assembly 70 being capable of driving the inner rod 50 axially relative to the core tube assembly 30 to urge the containment head 40 away from the core tube assembly 30 to release the distal end of the valve. It will be appreciated that the delivery device may include one of the first drive assembly 60 or the second drive assembly 70, and that when the delivery device includes only the first drive assembly 60 for releasing the proximal end of the valve, the inner rod 50 is driven to move axially relative to the core tube assembly 30 by manually controlling the proximal end of the inner rod 50 to release the distal end of the valve; when the delivery device comprises only the second drive assembly 70 for releasing the distal end of the valve, the sheath assembly 20 is driven proximally relative to the core tube assembly 30 to release the proximal end of the valve by manually controlling the proximal end of the sheath assembly 20.

In this embodiment, as shown in fig. 2 and 3, the accommodating head 40 includes a tubular connection portion 41 and a tubular housing portion 42 disposed around the tubular connection portion 41, wherein a distal end of the tubular connection portion 41 is connected to a distal end of the tubular housing portion 42, an annular cavity with a proximal opening is formed between an inner wall of the tubular housing portion 42 and an outer wall of the tubular connection portion 41 along a circumferential direction, that is, the second accommodating portion 401, and a distal end of the valve extends into the second accommodating portion 401 after being compressed. The inner wall surface of the tubular connecting portion 41 is provided with an internal thread, the distal end of the inner rod 50 is provided with an external thread, and the distal end of the inner rod 50 is inserted into the tubular connecting portion 41 and is in threaded fit with the tubular connecting portion 41 to achieve detachable connection. In other embodiments, the inner rod 50 and the tubular connecting portion 41 may be fixedly connected by conventional means such as cementing.

The sheath assembly 20 is capable of moving relative to the core tube assembly 30 in the axial direction between a third position and a fourth position, in which the sheath assembly 20 is in the third position, the distal end of the core tube assembly 30 is flush with the distal end of the sheath assembly 20 in the axial direction, and an annular cavity with a distal opening is formed between the distal end of the core tube assembly 30 and the distal end of the sheath assembly 20 in the circumferential direction, namely a first receiving portion 201, through which the proximal end of the valve is clamped and secured by the sheath assembly 20 and the core tube assembly 30; in the fourth position, the distal end of the sheath assembly 20 is axially closer to the proximal side than the distal end of the core tube assembly 30, allowing the proximal end of the valve to be withdrawn from the sheath assembly 20, thereby releasing the proximal end of the valve, which self-expands to the fully deployed state, completing the release of the valve. In this embodiment, the third position is closer to the distal end than the fourth position. Wherein the first drive assembly 60 is used to drive the sheath assembly 20 from the third position to the fourth position to release the proximal end of the valve. It should be emphasized that the proximal movement distance of the sheath assembly 20 is accurate and controllable by the way the primary drive assembly 60 drives the sheath assembly 20 relative to the manual operation of the sheath assembly 20, and the core tube assembly 30 is stationary to prevent deviation of the release position caused by the core tube assembly 30 being driven by the proximal end of the valve prior to release. In other embodiments, the distal end of the outer sheath assembly 20 and the portion of the core tube assembly 30 proximal to the distal end define a first receptacle therebetween in the circumferential direction, it being understood that in the third position the distal end of the core tube assembly 30 has exceeded the distal end of the outer sheath assembly 20; in the fourth position, the distal end of the core tube assembly 30 extends beyond the distal end of the outer sheath assembly 20 by a greater length, thereby releasing the proximal end of the valve.

In this embodiment, during the valve installation process, the proximal end of the valve is compressed first, the proximal end of the valve is fixed on the outer peripheral surface of the distal end of the core tube assembly 30, and then the outer sheath assembly 20 is moved from the fourth position to the third position, so that the proximal end of the valve is clamped and fixed by the outer sheath assembly 20 and the core tube assembly 30 together, and the proximal end of the valve is led into the first accommodating portion 201; then, the holding head 40 is mounted on the distal end of the inner rod 50, and the second driving assembly 70 drives the inner rod 50 to move towards one side of the proximal end to pull the holding head 40 to approach the core tube assembly 30, so that the distal end of the valve is compressed and extends into the second accommodating part 401, and the valve is mounted. Alternatively, in other embodiments, the distal end of the valve may be installed into the second receptacle 401 before the proximal end of the valve is installed into the first receptacle 201.

It should be noted that, during the release of the valve, the first driving assembly 60 is operated to drive the sheath assembly 20 to move so as to release the proximal end of the valve, and the second driving assembly 70 is operated to drive the accommodating head 40 to move so as to release the distal end of the valve. Therefore, the conveyor 100 proposed in this embodiment can sequentially release the distal end and the proximal end of the valve by operating the second driving assembly 70 and the first driving assembly 60, and then operate the second driving assembly 70 to release the distal end of the valve and operate the first driving assembly 60 to release the proximal end of the valve, so that after the distal end of the valve is released, if there is a large deviation in the deployment position of the valve, the core tube assembly 30 and the sheath assembly 20 can still be used to pull or push the valve in the semi-deployment state (i.e. the state that the distal end of the valve is deployed and the proximal end of the valve is retracted in the first accommodating portion 201) to adjust the position of the valve, and when the valve reaches the ideal position, the proximal end of the valve is finally released, so that the position accuracy of the valve after the release is more accurate, and the surgical quality is improved.

In some exemplary embodiments, as shown in fig. 2, the first driving assembly 60 includes a first elastic member 61 and a control member 62, one end of the first elastic member 61 is connected to the sheath assembly 20, the other end of the first elastic member 61 is connected to the handle assembly 10, the control member 62 is movably disposed in the accommodating cavity 101 and cooperates with a proximal end stop of the sheath assembly 20, so that the control member 62 can be shifted between a first position, in which the control member 62 is in the first position (see fig. 2 and 6), the proximal end 20a of the sheath assembly 20 abuts against the control member 62, and the first elastic member 61 is in a compressed state to apply an elastic force to the cooperation member 22 of the sheath assembly 20 toward the proximal end, the control member 62 serves to block the sheath assembly 20 from moving toward the proximal end, and pushes the proximal end 20a of the sheath assembly 20 against the control member 62 by an elastic driving force of the first elastic member 61 to keep the sheath assembly 20 in a fixed state with respect to the handle assembly 10 and the core tube assembly 30. When the control member 62 is in the second position (see fig. 7), the proximal end 20a of the sheath assembly 20 is separated from the control member 62, and the first resilient member 61 expands and drives the sheath assembly 20 proximally relative to the handle assembly 10 to move the sheath assembly 20 from the third position to the fourth position, thereby releasing the proximal end of the valve. In this embodiment, the control member 62 is only required to be moved from the first position to the second position, and the elastic force of the first elastic member 61 is used to drive the sheath assembly 20 to move, so that the release operation of the valve is simple and quick.

In an exemplary embodiment, as shown in fig. 2 and 5, the control member 62 includes a main body 621 and a pressing portion 622 connected to each other, the main body 621 is movably disposed in the accommodating cavity 101, and an end of the pressing portion 622 away from the main body 621 passes through the first housing 11 and is located outside the accommodating cavity 101, so that during the valve releasing process, only the pressing portion 622 needs to be pressed outside the accommodating cavity 101, so that the main body 621 moves from the first position to the second position to release the proximal end of the valve, which is easy and quick to operate, and is beneficial to shortening the operation time and reducing the operation risk.

In the present embodiment, as shown in fig. 4 and 5, the first driving assembly 60 further includes a second elastic member 64. At least one first spring sleeving column 6213 is disposed on the main body 621, a second spring sleeving column 122 (refer to fig. 11) opposite to the first spring sleeving column 6213 is disposed on the second housing 12, two ends of the second elastic member 64 are sleeved on the first spring sleeving column 6213 and the second spring sleeving column 122, two ends of the second elastic member 64 respectively abut against the main body 621 and the second housing 12, and the elastic driving force of the second elastic member 64 in a compressed state pushes the main body 621 to abut against the inner wall of the first housing 11, so that the control member 62 can be kept at the first position. When the pressing portion 622 is pressed, the main body portion 621 moves to a side closer to the second housing 12 by an external force, so that the control member 62 moves to the second position. In this embodiment, in the process of releasing the valve, the pressing portion 622 is only pressed outside the accommodating cavity 101, so that the main body portion 621 moves from the first position to the second position to release the proximal end of the valve, which is easy and quick to operate, and is beneficial to shortening the operation time and reducing the operation risk.

In other embodiments, a first clamping structure (not shown in the drawings) and a second clamping structure (not shown in the drawings) are disposed on the first housing 11 or the second housing 12 at intervals, the main body portion 621 is disposed with a third clamping structure (not shown in the drawings), the third clamping structure can be respectively clamped with the first clamping structure and the second clamping structure, when the third clamping structure is clamped with the first clamping structure, the control member 62 is in the first position, and when the third clamping structure is clamped with the second clamping structure, the control member 62 is in the second position. The first clamping structure and the second clamping structure can be clamping grooves, and the third clamping structure is a buckle matched with the clamping grooves in a clamping mode. The control piece 62 is in the clamping state at the first position and the second position in a clamping mode, so that the control piece 62 is in a firm locking state at the first position and the second position, and the probability of valve loosening caused by mistaken contact with the control piece 62 in the valve implantation process is reduced.

Further, as shown in fig. 2, the outer sheath assembly 20 includes an outer sheath 21 and a mating member 22. Specifically, the outer sheath 21 is sleeved outside the core tube assembly 30 and the proximal end of the outer sheath 21 is movably disposed in the receiving cavity 101. The fitting 22 is disposed in the accommodating cavity 101 and sleeved outside the outer sheath 21 and is located at the proximal end 21a of the outer sheath 21, the fitting 22 includes a first stop 2211 (see fig. 9) located at a distal end and a second stop 224 (see fig. 8) located at a proximal end, the first elastic member 61 is sleeved outside the outer sheath 21, and the distal end of the first elastic member 61 abuts against the stop 110 (see fig. 12) extending from the inner wall of the distal end of the first housing 11 and the stop 120 (see fig. 11) extending from the inner wall of the distal end of the second housing 12, the proximal end of the first elastic member 61 abuts against the first stop 2211 in a compressed state, and the main body 621 of the control member 62 abuts against the second stop 224. In other embodiments, the first stop 2211 and the second stop 224 may be provided directly on the proximal end 21a of the outer sheath 21 without providing the engaging member 22.

The first elastic member 61 may be a coil spring, a spring plate, or the like. In this embodiment, the fitting member 22 is respectively abutted and fitted with the first elastic member 61 and the control member 62, and the first elastic member 61 is used as the driving force for moving the sheath 21, so that the overall structure of the conveyor 100 is compact, the production cost is reduced, the operation is simple, the operation procedure is simplified, and the operation time is shortened. In other embodiments, the distal end of the first elastic member 61 may abut against the inner wall of the distal end of the first housing 11 and the inner wall of the distal end of the second housing 12, and the side of the first housing 11 and the side of the second housing 12 near the distal end may be configured in a tapered structure such that the diameter of the accommodating cavity 101 near the distal end is smaller than the diameter of the first elastic member 61, thereby enabling the distal end of the first elastic member 61 to abut against the inner walls of the first housing 11 and the second housing 12.

In an exemplary embodiment, as shown in fig. 8 and 9, the fitting 22 is generally tubular, and the fitting 22 includes a first step structure 221, a second step structure 222, and a third step structure 223 disposed in order from the distal end to the proximal end and having a decreasing diameter, and the proximal end of the sheath 21 is inserted into the second step structure 222 and fixedly connected to the second step structure 222. A first stepped surface 2212 is formed between the first stepped structure 221 and the second stepped structure 222, a second stepped surface 2221 is formed between the second stepped structure 222 and the third stepped structure 223, a distal end surface of the first stepped structure 221 forms a first stopper 2211, and the first stopper 2211 protrudes out of the outer wall surface of the outer sheath 21 so that the proximal end of the first elastic member 61 abuts against the first stopper 2211. The second stopper 224 is a convex structure provided on the outer peripheral surface of the proximal end of the third step structure 223. In other embodiments, the proximal end of the outer sheath 21 may be directly attached to the distal end of the mating member 22.

As shown in fig. 8 to 11, the inner wall of the second housing 12 is provided with a first rib 121 extending along the circumferential direction, the first rib 121 is located at the distal end of the control member 62, the fitting 22 passes through the first rib 121 and can move axially relative to the first rib 121, when the fitting 22 moves proximally, the second stepped structure 222 can abut against the distal end of the first rib 121, and when the fitting 22 moves distally, the second stop portion 224 can abut against the proximal end of the first rib 121, so as to limit the movement range of the sheath assembly 20 by using the first rib 121, thereby being beneficial to precisely controlling the movement range of the sheath tube 21 and enabling the release process of the valve to be more precise.

Referring to fig. 11, the inner wall of the second housing 12 is provided with a second rib 124 extending in the circumferential direction, and it is understood that the inner wall of the first housing 11 also has a rib that cooperates with the second rib 124. Wherein the second bead 124 has an opening in the middle thereof to facilitate passage of the mating element 22. The engagement member 22 is disposed between the first rib 121 and the second rib 124 to prevent axial movement of the engagement member 22 along the handle assembly.

In some embodiments, as shown in fig. 8 and 11, the first bead 121 is provided with a first guide groove 1211, the outer circumferential surface of the third stepped structure 223 is provided with a first guide bead 2231, the first guide bead 2231 is slidably engaged with the first guide groove 1211, and both the first guide bead 2231 and the first guide groove 1211 extend in an axial direction to define a moving direction of the sheath assembly 20 by engagement of the first guide bead 2231 with the first guide groove 1211 and prevent rotation of the engaging member 22 and the sheath tube 21 in a circumferential direction relative to the handle assembly 10 and the core tube assembly 30.

Or in other embodiments, the first guide groove is arranged on the third step structure, and the first guide rib is arranged on the first rib.

Further, in the present embodiment, as shown in fig. 5 to 7, the main body 621 is provided with a first guiding hole 6211, the engaging member 22 is disposed in the first guiding hole 6211, the inner wall of the first guiding hole 6211 facing away from the pressing portion 622 is provided with a boss 6212, and the boss 6212 is in stop engagement with the second stop portion 224. When the sheath assembly 20 is in the third position, the control member 62 is in the first position, the proximal end of the mating member 22 is positioned within the first guide aperture 6211, and the proximal end face of the second stop 224 abuts against the distal end face of the boss 6212, thereby placing the sheath assembly 20 in the locked state. When the pressing portion 622 is pressed, the boss 6212 moves in a direction away from the pressing portion 622, and when the control member 62 is in the second position, the proximal end surface of the second stop portion 224 is out of contact with the distal end surface of the boss 6212, at this time, the sheath assembly 20 is in an unlocked state, and under the driving of the elastic force of the first elastic member 61, the second stop portion 224 passes through the first guide hole 6211 and moves toward the proximal side until the proximal end of the valve is completely released after the sheath assembly 20 moves to the fourth position.

In this embodiment, as shown in fig. 2 and 4, the second driving assembly 70 includes a screw 71 and a knob 72, the screw 71 is provided with external threads, and the screw 71 is fixedly connected to the proximal end of the inner rod 50, the knob 72 is provided with internal threads matching the external threads of the screw 71, and the knob 72 can drive the screw 71 to move axially relative to the handle assembly 10. Specifically, an annular groove 1011 is provided on the inner wall of the proximal side of the housing chamber 101 (see fig. 11 and 12), an annular protrusion 721 is provided on the outer peripheral surface of the knob 72 near the distal end, and the annular protrusion 721 is engaged with the annular groove 1011, and the annular protrusion 721 is inserted into the annular groove 1011 and is rotatable in the circumferential direction, so that the knob 72 is rotatable in the circumferential direction, and the knob 72 is prevented from moving in the axial direction by the engagement of the annular groove 1011 and the annular protrusion 721. The axis of the screw 71 and the axis of the knob 72 are parallel to the axis of the handle assembly 10. Upon forward rotation of knob 72, knob 72 drives screw 71 axially proximally, thereby driving inner rod 50 and receiving head 40 proximally. When the knob 72 is reversely rotated, the knob 72 drives the screw 71 to move toward the distal end in the axial direction, thereby driving the inner rod 50 and the accommodating head 40 to move toward the distal end side.

Referring to fig. 2, 4 and 14, the conveyor further includes a guide member 13, where the guide member 13 is disposed in the accommodating cavity 101 and near a proximal end of the accommodating cavity 101, and the guide member 13 is fixedly connected with the first housing 11 and the second housing 12, respectively, and the guide member 13 is integrally in a tubular structure so that the inner rod can pass through the guide member 13 to be connected with the second driving assembly. The guide 13 includes a connecting hole 1321 and a second guide hole 1311 extending in the axial direction and disposed in series and communicating with each other, the connecting hole 1321 being located distally with respect to the second guide hole 1311, the proximal end of the core tube assembly 30 being sleeved and fixed in the connecting hole 1321, the distal end of the screw 71 extending into the second guide hole 1311.

As shown in fig. 15 and 16, the screw 71 is provided with a second guide groove 711 extending along an axial direction, the second guide groove 711 penetrates the external threads on the plurality of screw 71, the inner wall of the second guide hole 1311 is provided with a second guide rib 1312 slidingly engaged with the second guide groove 711, and the second guide groove 711 and the second guide rib 1312 both extend along the axial direction so as to prevent the screw 71 from rotating along the circumferential direction relative to the handle assembly 10 by the engagement of the second guide groove 711 and the second guide rib 1312, so as to ensure the screw 71 to move along the axial direction when the knob 72 is rotated.

In this embodiment, as shown in fig. 2 and 14, the guide member 13 includes a body portion 131 and a tubular guide portion 132 disposed at a distal end of the body portion 131, and the engaging member 22 is disposed around the tubular guide portion 132 in a tubular shape and capable of moving in an axial direction, so that the moving direction of the engaging member 22 is restricted by further restraining the tubular guide portion 132, and the engaging member 22 is prevented from shaking in a circumferential direction by engagement between an outer peripheral surface of the tubular guide portion 132 and an inner wall surface of the engaging member 22, so that the engaging member 22 is more stable when moving in the axial direction. Wherein, the outer peripheral surface of the tubular guiding part 132 near the distal end side is provided with a conical surface, and the guiding function of the conical surface is utilized to facilitate the insertion of the matching piece 22 outside the tubular guiding part 132.

In this embodiment, as shown in fig. 2 and 17, the core tube assembly 30 includes a core tube 31 and a fixing member 32, wherein a proximal end of the core tube 31 is connected to the handle assembly 10, and specifically, the proximal end of the core tube 31 is inserted into a connection hole 1321 (see fig. 14) of the guide member 13 and fixedly connected to the guide member 13. The fixing piece 32 is sleeved outside the core tube 31 and is located at the distal end of the core tube 31, a first accommodating part 201 is defined between the fixing piece 32 and the distal end of the outer sheath tube 21 along the circumferential direction, the fixing piece 32 is provided with a plurality of toothed protrusions 321 which are sequentially arranged at intervals along the circumferential direction of the fixing piece 32, the toothed protrusions 321 are used for hooking and connecting with a proximal support of a valve, so that the proximal end of the valve is prevented from loosening from the first accommodating part 201 after the distal end of the valve is released, and the position of the valve can be continuously adjusted by pulling or pushing the outer sheath assembly 20 and the core tube assembly 30 to improve the accuracy of valve throwing after the distal end of the valve is released.

According to an embodiment of the present invention, there is also provided a delivery system 200, the delivery system 200 comprising a medical device 2001 (e.g., a valve) and a delivery device 100, a proximal end of the medical device being received in a first receiving portion and a distal end of the medical device being received in a second receiving portion. The conveying system provided by the invention has the same technical effects as the conveyor, and is not described in detail herein.

It should be noted that the delivery device 100 and the delivery system 200 according to the embodiments of the present invention are applicable to a surgical method in which a surgical operation is performed to expose a target implantation site, and then a medical instrument is implanted at the target implantation site using the delivery device 100 and the delivery system 200 according to the embodiments of the present invention. The advantages of surgical replacement, such as the accuracy of the procedure, on the one hand, and the time required for current surgical procedures, on the other hand, can be inherited over conventional surgical replacement.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A conveyor for conveying medical devices, the conveyor comprising:

a core tube assembly;

2. The conveyor of claim 1, further comprising:

A first drive assembly coupled to the sheath assembly, the first drive assembly for driving the sheath assembly proximally relative to the core tube assembly to release the proximal end of the medical device;

And/or a second drive assembly coupled to the proximal end of the inner rod for driving the inner rod axially relative to the core tube assembly to push the containment head away from the core tube assembly and release the distal end of the medical device.

3. The conveyor of claim 2, wherein the first drive assembly comprises:

A first elastic member connected to the outer sheath assembly in a compressed state;

A control member cooperating with a proximal stop of the sheath assembly such that the control member is switchable between a first position and a second position;

In the first position, the proximal end of the sheath assembly abuts against the control member, and the first elastic member is in a compressed state to apply an elastic force to the sheath assembly toward the proximal end side;

in the second position, the proximal end of the sheath assembly is separated from the control member, and the first resilient member extends and drives the sheath assembly proximally.

4. A conveyor as in claim 3 wherein the outer sheath assembly comprises:

An outer sheath;

the matching piece is sleeved at the proximal end part of the outer sheath tube and comprises a first stop part positioned at the distal end and a second stop part positioned at the proximal end;

wherein the proximal end of the first elastic element in a compressed state abuts against the first stop portion;

The control piece is matched with the second stop part in a stop mode.

5. The conveyor according to claim 4, wherein the fitting comprises a first step structure, a second step structure and a third step structure which are sequentially arranged from a distal end to a proximal end and have decreasing diameters, a distal end surface of the first step structure forms the first stop part, the second stop part is a protruding structure arranged on an outer peripheral surface of a proximal end of the third step structure, and a proximal end of the sheath tube penetrates the fitting from the distal end of the fitting and is fixedly connected with the fitting.

6. The conveyor of claim 5, wherein the proximal end of the conveyor includes a handle assembly, wherein the first drive assembly is disposed within the handle assembly, wherein the handle assembly includes a housing, wherein an inner wall of the housing is provided with a first bead extending circumferentially, wherein the first bead is located at a distal end of the control member, wherein the mating member extends through the first bead and is axially movable relative to the first bead, wherein the second stepped structure is configured to abut a distal end of the first bead when the mating member is moved proximally, and wherein the second stop is configured to abut a proximal end of the first bead when the mating member is moved distally.

7. The conveyor of claim 6, wherein one of the first ribs and the third stepped structure is provided with a first guide groove, and the other of the first ribs and the third stepped structure is provided with a first guide rib slidably engaged with the first guide groove, and the first guide rib and the first guide groove each extend in the axial direction.

8. The conveyor of claim 3, wherein the conveyor is configured to move,

The control piece is provided with a first guide hole, the proximal end of the outer sheath component can axially penetrate through the first guide hole, the inner wall of the first guide hole is provided with a boss, and the boss is matched with the proximal end stop of the outer sheath component;

the control piece is also provided with a second elastic piece, and the second elastic piece is in a compressed state and drives the control piece to move vertically and axially, so that the proximal end of the outer sheath component abuts against the boss.

9. The conveyor of claim 2, wherein the conveyor comprises a conveyor belt,

The second driving assembly includes:

the screw rod is fixedly connected with the proximal end of the inner rod;

and the knob is rotatably matched with the thread of the screw rod and can drive the screw rod to move along the axial direction.

10. The conveyor of claim 9, further comprising: the guide piece comprises a connecting hole and a second guide hole which extend along the axial direction and are sequentially arranged and communicated, the connecting hole is located at the far end relative to the second guide hole, the near end of the core tube assembly is sleeved and fixed in the connecting hole, and the far end of the screw rod extends into the second guide hole.

11. The conveyor of claim 10, wherein the conveyor is configured to move,

The screw is provided with a second guide groove extending along the axial direction;

the inner wall of the second guide hole is provided with a second guide convex rib which is in sliding fit with the second guide groove.

12. The conveyor of claim 1, wherein the core tube assembly comprises:

A core tube;

the fixing piece is connected with the distal end of the core tube;

The medical device comprises a fixing piece, a sheath assembly, a first containing part, a second containing part, a plurality of tooth-shaped protrusions and a connecting rod, wherein the first containing part is defined between the fixing piece and the distal end of the sheath assembly along the circumferential direction, the tooth-shaped protrusions are arranged along the circumferential direction of the fixing piece at intervals in sequence and are used for hooking and connecting with the proximal end of the medical device.

13. A delivery system, comprising:

the conveyor of any one of claims 1-12;

The medical instrument, the proximal end of medical instrument is acceptd in first acceptd portion, the distal end of medical instrument acceptd in second acceptd portion.