Conveyor and conveying system

Abstract

The present application relates to a kind of conveyor and conveying system, wherein, the conveyor includes: core tube assembly;Sheath assembly, sheath assembly is set outside core tube assembly, along the circumferential direction, the distal end of sheath assembly and the first receiving part between core tube assembly are defined;Inner rod, inner rod is set to the inside of core tube assembly, the distal end of inner rod is worn out the distal end of core tube assembly;Accommodation head, accommodation head is connected to the distal end of inner rod, accommodation head and the distal end of sheath assembly are arranged axially spaced, and the proximal end of accommodation head is equipped with second receiving part.The present application aims to provide a kind of directly and quickly operated conveyor.

Description

Technical Field

[0001] This invention relates to the field of interventional medical device technology, and more particularly to a delivery device and delivery system. Background Technology

[0002] Heart valves are the valves between the atria and ventricles or between the ventricles and arteries. They include the mitral valve (located between the left ventricle and left atrium), the tricuspid valve (located between the right ventricle and right atrium), the pulmonary valve (located at the outlet of the right ventricle), and the aortic valve (located at the outlet of the left ventricle).

[0003] Currently, there are two main treatment methods for heart valve dysfunction. Taking the aortic valve as an example, it can be divided into surgical valve replacement and transcatheter aortic valve replacement. Surgical replacement requires opening the patient's aorta while on cardiopulmonary bypass, removing the aortic valve, implanting an artificial valve, suturing the implanted valve to the aortic annulus, stopping circulation, and closing the chest to complete the surgery. Transcatheter replacement, performed under X-ray guidance, involves placing the valve in a coiled position at the end of a catheter, reaching the implantation site, and then expanding it to its functional size to replace the diseased heart valve.

[0004] However, regardless of the method, there are some practical problems. For example, the cardiopulmonary bypass procedure is long and has a high surgical risk; the transcatheter valve replacement procedure is a non-direct vision procedure, which does not allow for direct visualization of the prosthetic valve and makes it inconvenient to directly and quickly locate the prosthetic valve to the treatment site. Summary of the Invention

[0005] In view of the above problems, the present invention aims to provide a conveyor that can be operated directly and quickly.

[0006] This objective is achieved through the following technical solutions:

[0007] According to a first aspect of the present invention, a delivery device is provided for delivering a medical device, the delivery device comprising:

[0008] Core tube assembly;

[0009] An outer sheath assembly is sleeved over the core tube assembly, and a first receiving portion is defined between the distal end of the outer sheath assembly and the core tube assembly in the circumferential direction;

[0010] An inner rod is disposed inside the core tube assembly, and the distal end of the inner rod extends out of the distal end of the core tube assembly;

[0011] A receiving head is connected to the distal end of the inner rod, and the receiving head is axially spaced from the distal end of the outer sheath assembly. A second receiving portion is provided at the proximal end of the receiving head.

[0012] Furthermore, the delivery device further includes: a first drive assembly connected to the outer sheath assembly, the first drive assembly being configured to drive the outer sheath assembly to move proximally relative to the core tube assembly to release the proximal end of the medical device; and / or, a second drive assembly connected to the proximal end of the inner rod, the second drive assembly being configured to drive the inner rod to move axially relative to the core tube assembly to push the receiving head away from the core tube assembly and release the distal end of the medical device.

[0013] Further, the first driving component includes: a first elastic member connected to the outer sheath assembly in a compressed state; and a control member cooperating with a proximal stop of the outer sheath assembly, such that the control member can switch between a first position and a second position; in the first position, the proximal end of the outer sheath assembly abuts against the control member, and the first elastic member is compressed to apply an elastic force toward the proximal end of the outer sheath assembly; in the second position, the proximal end of the outer sheath assembly separates from the control member, and the first elastic member extends and drives the outer sheath assembly to move toward the proximal end.

[0014] Further, the outer sheath assembly includes: an outer sheath tube; a fitting member sleeved on the proximal end of the outer sheath tube, the fitting member including a first stop portion located at the distal end and a second stop portion located at the proximal end; wherein, the proximal end of the first elastic member in a compressed state abuts against the first stop portion; the control member stops and engages with the second stop portion.

[0015] Furthermore, the mating component includes a first stepped structure, a second stepped structure, and a third stepped structure arranged sequentially from the distal end to the proximal end, with decreasing diameters. The distal end face of the first stepped structure forms the first stop portion, and the second stop portion is a protruding structure provided on the outer peripheral surface of the proximal end of the third stepped structure. The proximal end of the outer sheath tube passes through the mating component from the distal end of the mating component and is fixedly connected to the mating component.

[0016] Furthermore, the proximal end of the conveyor includes a handle assembly, in which the first drive assembly is disposed. The handle assembly includes a housing, the inner wall of which is provided with a first rib extending circumferentially. The first rib is located at the distal end of the control member. The mating member passes through the first rib and is axially movable relative to the first rib. When the mating member moves towards the proximal end, the second stepped structure abuts against the distal end of the first rib. When the mating member moves towards the distal end, the second stop abuts against the proximal end of the first rib.

[0017] Furthermore, one of the first rib and the third stepped structure is provided with a first guide groove, and the other of the two is provided with a first guide rib that slides in cooperation with the first guide groove. Both the first guide rib and the first guide groove extend in the axial direction.

[0018] Furthermore, the control component is provided with a first guide hole, through which the proximal end of the outer sheath assembly can axially pass. The inner wall of the first guide hole is provided with a boss, which cooperates with the proximal end stop of the outer sheath assembly. The control component is also provided with a second elastic element, which is in a compressed state, driving the control component to move vertically axially, so that the proximal end of the outer sheath assembly abuts against the boss.

[0019] Furthermore, the second drive assembly includes: a screw fixedly connected to the proximal end of the inner rod; and a knob rotatably threadedly engaged with the screw, the knob being capable of driving the screw to move axially.

[0020] Furthermore, the conveyor also includes a guide member, which includes a connecting hole and a second guide hole that extend axially and are arranged sequentially and communicate with each other. The connecting hole is located at the distal end relative to the second guide hole. The proximal end of the core tube assembly is sleeved and fixed in the connecting hole, and the distal end of the screw extends into the second guide hole.

[0021] Furthermore, 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 rib that slides in cooperation with the second guide groove.

[0022] Further, the core tube assembly includes: a core tube; a fixing member connected to the distal end of the core tube; wherein, along the circumferential direction, the fixing member defines the first receiving portion between the distal end of the outer sheath assembly, and the fixing member is provided with a plurality of toothed protrusions arranged sequentially and spaced apart along the circumferential direction of the fixing member, the toothed protrusions being used for hooking and connecting with the proximal end of the medical device.

[0023] The delivery device of this invention defines a first receiving portion between the distal end of the outer sheath assembly and the core tube assembly, and a second receiving portion is provided at the proximal end of the receiving head. The receiving head and the distal end of the outer sheath assembly are axially spaced apart, allowing both ends of the medical device to be received in the first and second receiving portions respectively. Furthermore, the main body of the medical device is located between the receiving head and the core tube assembly without being contained within the outer sheath assembly. Therefore, compared to completely containing the medical device within the catheter, when the treatment site is exposed surgically, the delivery device only receives the end of the medical device without completely compressing and containing it within the delivery device. This allows for direct visualization of the medical device, enabling direct and rapid positioning of the device to the treatment site. Additionally, the medical device occupies less internal space in the outer sheath assembly and the receiving head, reducing their diameter and facilitating intervention. Compared to conventional surgical replacement surgery, this device retains the advantages of surgical replacement, such as precision, while reducing the time required for current surgical procedures.

[0024] According to a second aspect of the present invention, a delivery system is also provided, comprising: the delivery device described in the first aspect; and a medical device, wherein the proximal end of the medical device is housed in the first receiving portion, and the distal end of the medical device is housed in the second receiving portion. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of a conveyor according to an embodiment of the present invention is shown.

[0027] Figure 2 schematically shown Figure 1 A schematic diagram of the cross-sectional structure of section AA;

[0028] Figure 3 A schematic cross-sectional view of the receiving head according to an embodiment of the present invention is shown.

[0029] Figure 4 An exploded view of the components of a conveyor according to an embodiment of the present invention is shown schematically.

[0030] Figure 5 A schematic diagram of the structure of the control component according to an embodiment of the present invention is shown.

[0031] Figure 6A schematic diagram illustrating the relative positions of the control member and the mating member in the locked state according to an embodiment of the present invention is shown.

[0032] Figure 7 A schematic diagram illustrating the relative positions of the control component and the mating component in the unlocked state according to an embodiment of the present invention is shown.

[0033] Figure 8 A schematic diagram of the structure of the mating component according to an embodiment of the present invention is shown.

[0034] Figure 9 A schematic cross-sectional view of the mating component according to an embodiment of the present invention is shown.

[0035] Figure 10 The illustration schematically shows an embodiment of the present invention. Figure 2 Enlarged cross-sectional structural diagram of section A.

[0036] Figure 11 A schematic diagram of a second housing according to an embodiment of the present invention is shown;

[0037] Figure 12 A schematic diagram of a first housing according to an embodiment of the present invention is shown;

[0038] Figure 13 A schematic diagram of the second housing from a frontal view according to an embodiment of the present invention is shown;

[0039] Figure 14 A schematic cross-sectional structural diagram of a guide member according to an embodiment of the present invention is shown.

[0040] Figure 15 A schematic diagram of the screw structure according to an embodiment of the present invention is shown;

[0041] Figure 16 A schematic diagram illustrating the structure of the guide member cooperating with the screw according to an embodiment of the present invention is shown.

[0042] Figure 17 A schematic diagram of the structure of the fastener and inner rod according to an embodiment of the present invention is shown. Detailed Implementation

[0043] Exemplary embodiments of the present disclosure will now be described in more detail 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 implemented 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.

[0044] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0045] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0046] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0048] Please combine Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, a delivery device 100 is provided for delivering medical devices. The medical device may be a valve, a vascular stent, an occluder, etc. In this embodiment, a valve is used as an example.

[0049] The delivery device 100 includes a handle assembly 10, an outer sheath assembly 20, a core tube assembly 30, a receiving 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 on the core tube assembly 30, and a first receiving portion 201 is defined between the distal end of the outer sheath assembly 20 and the core tube assembly 30 in the circumferential direction. The inner rod 50 is disposed inside the core tube assembly 30, and the distal end of the inner rod 50 extends out of the distal end of the core tube assembly 30. The receiving head 40 is connected to the distal end of the inner rod 50 and is axially spaced from the core tube assembly 30. The distal end of the receiving head 40 is provided with a second receiving portion 401, the proximal end of the valve 2001 is received in the first receiving portion 201, and the distal end of the valve 2001 is received in the second receiving portion 401. In other embodiments, the handle assembly 10 may not be required. The positional relationship between the outer sheath assembly 20, the core tube assembly 30, and the inner rod 50 can be manually controlled 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 achieving the reception and release of the valve 2001.

[0050] It should be noted that the two ends of the valve 2001 are respectively housed in the first housing portion 201 and the second housing portion 401, and the main body of the valve is located between the receiving head 40 and the core tube assembly 30. Therefore, compared to housing the entire valve inside the catheter, the delivery device 100 only houses the end of the valve without completely compressing and housing the valve inside the delivery device 100, exposing the middle part of the valve 2001 outside the delivery device. By surgically exposing the treatment site, the middle part of the valve 2001 can be directly and quickly positioned on the valve annulus of the treatment site. Furthermore, the valve occupies less internal space in the outer sheath assembly 20 and the receiving head 40, thereby reducing the diameter of the outer sheath assembly 20 and the receiving head 40, making valve intervention easier.

[0051] It should also be emphasized that, since the valve is compressed and contained in the delivery device 100 at only its two ends, the release process is more rapid when the valve is released.

[0052] Understandably, due to the self-expanding characteristics of valves, the valve undergoes significant deformation during its expansion from a fully compressed state to a fully extended state. This results in a substantial change in the valve's position after full expansion compared to its compressed state. Since the valve's expansion process requires release from the delivery device 100, the position of the released valve is not entirely controllable, leading to a deviation from the ideal position. However, in the delivery device 100 proposed in this embodiment, the proximal and distal ends of the valve are compressed and housed within the delivery device 100, while the central region between the proximal and distal ends is in a semi-expanded state. This means that the valve is already in a partially semi-expanded state before the delivery device 100 releases the valve. Therefore, the deformation from a partially semi-expanded state to full expansion is smaller than the deformation from a fully compressed state to a fully expanded state. Consequently, the positional change of the valve after expansion is smaller, resulting in higher positional accuracy after release and expansion.

[0053] Specifically, the handle assembly 10 includes a first housing 11 and a second housing 12, which are detachably connected to form a hollow tubular structure, creating a receiving cavity 101 between the first housing 11 and the second housing 12. In an exemplary embodiment, such as... Figure 12 and Figure 13 As shown, the first housing 11 is provided with multiple first buckles 111, and the second housing 12 is provided with first slots 123 that engage with the first buckles 111. The first housing 11 and the second housing 12 are connected by inserting the first buckles 111 into the first slots 123. An opening is formed at the distal end of the first housing 11 and the second housing 12, allowing the proximal ends of the core tube assembly 30, the outer sheath assembly 20, and the inner rod 50 to extend into the receiving cavity 101 through the opening. In other embodiments, the first housing 11 and the second housing 12 are fixed by common methods such as screws or adhesive bonding, or they can be a single integrated structure.

[0054] In some embodiments of the present invention, such as Figure 2As shown, the delivery device 100 also includes a first drive assembly 60 and a second drive assembly 70. The first drive assembly 60 is disposed in the receiving cavity 101 and connected to the outer sheath assembly 20. The first drive assembly 60 is capable of driving the outer sheath assembly 20 to move proximally relative to the core tube assembly 30 to release the proximal end of the valve. The second drive assembly 70 is movably disposed in the handle assembly 10 and connected to the proximal end of the inner rod 50. The second drive assembly 70 is capable of driving the inner rod 50 to move axially relative to the core tube assembly 30 to push the receiving head 40 away from the core tube assembly 30, thereby releasing the distal end of the valve. Understandably, the delivery device may include either a first drive assembly 60 or a second drive assembly 70. When the delivery device includes only the first drive assembly 60, it is used to release the proximal end of the valve, and 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 includes only the second drive assembly 70, it is used to release the distal end of the valve, and the outer sheath assembly 20 is driven to move proximally relative to the core tube assembly 30 by manually controlling the proximal end of the outer sheath assembly 20 to release the proximal end of the valve.

[0055] In this embodiment, such as Figure 2 and Figure 3 As shown, the receiving head 40 includes a tubular connecting portion 41 and a tubular housing portion 42 surrounding the tubular connecting portion 41. The distal end of the tubular connecting portion 41 is connected to the distal end of the tubular housing portion 42. Along the circumferential direction, an annular cavity with a proximal opening is formed between the inner wall of the tubular housing portion 42 and the outer wall of the tubular connecting portion 41, which is the second receiving portion 401. The distal end of the valve extends into the second receiving portion 401 after being compressed. The inner wall surface of the tubular connecting portion 41 is provided with internal threads, and the distal end of the inner rod 50 is provided with external threads. The distal end of the inner rod 50 is inserted into the tubular connecting portion 41 and is threadedly engaged with the tubular connecting portion 41 to achieve a detachable connection. In other embodiments, the inner rod 50 and the tubular connecting portion 41 can also be fixedly connected by conventional means such as adhesive bonding.

[0056] The outer sheath assembly 20 is movable relative to the core tube assembly 30 in the axial direction between a third position and a fourth position. In the third position, the distal end of the core tube assembly 30 is flush with the distal end of the outer sheath assembly 20 in the axial direction, and an annular cavity with a distal opening is formed between the distal ends of the core tube assembly 30 and the distal end of the outer sheath assembly 20 in the circumferential direction, which is the first receiving part 201. The outer sheath assembly 20 and the core tube assembly 30 clamp and fix the proximal end of the valve. In the fourth position, the distal end of the outer sheath assembly 20 is closer to the proximal end relative to the distal end of the core tube assembly 30 in the axial direction, causing the proximal end of the valve to disengage from the outer sheath assembly 20, thereby releasing the proximal end of the valve. The valve expands until it is fully deployed, completing the valve release. In this embodiment, the third position is closer to the distal end than the fourth position. The first driving assembly 60 is used to drive the outer sheath assembly 20 from the third position to the fourth position to release the proximal end of the valve. It is important to emphasize that, compared to manually and slowly manipulating the outer sheath assembly 20, the process of slowly moving the core tube assembly 30 relative to the outer sheath assembly 20 is achieved by driving the outer sheath assembly 20 with the first driving assembly 60. This ensures that the proximal movement distance of the outer sheath assembly 20 is precise and controllable, while the core tube assembly 30 remains stationary to prevent the proximal end of the valve from being moved by the core tube assembly 30 before release, thus preventing deviation in the release position. In other embodiments, a first receiving portion is defined between the distal end of the outer sheath assembly 20 and the portion of the core tube assembly 30 near the distal end in the circumferential direction. This can be understood as follows: in the third position, the distal end of the core tube assembly 30 has already extended beyond the distal end of the outer sheath assembly 20; in the fourth position, the length by which the distal end of the core tube assembly 30 extends beyond the distal end of the outer sheath assembly 20 is even longer, thereby releasing the proximal end of the valve.

[0057] In this embodiment, during valve installation, the proximal end of the valve is first compressed and fixed to the outer peripheral surface of the distal end of the core tube assembly 30. Then, the outer sheath assembly 20 is moved from the fourth position to the third position, so that the outer sheath assembly 20 and the core tube assembly 30 together clamp and fix the proximal end of the valve, bringing the proximal end of the valve into the first receiving portion 201. Then, the receiving head 40 is installed to the distal end of the inner rod 50, and the second driving assembly 70 drives the inner rod 50 to move towards the proximal end, pulling the receiving head 40 closer to the core tube assembly 30, compressing the distal end of the valve and extending it into the second receiving portion 401, thereby completing the valve installation. Alternatively, in other embodiments, the distal end of the valve can be installed into the second receiving portion 401 first, and then the proximal end of the valve can be installed into the first receiving portion 201.

[0058] It should be noted that during valve release, the first driving component 60 drives the outer sheath component 20 to move, releasing the proximal end of the valve, and the second driving component 70 drives the receiving head 40 to move, releasing the distal end of the valve. Therefore, the delivery device 100 proposed in this embodiment can sequentially release the distal and proximal ends of the valve by operating the second driving component 70 and the first driving component 60. First, the second driving component 70 is operated to release the distal end of the valve, and then the first driving component 60 is operated to release the proximal end. This allows the valve to be adjusted in position if there is a significant deviation in its unfolded position after the distal end is released, by using the core tube component 30 and the outer sheath component 20 to pull or push the valve in a semi-unfolded state (i.e., the distal end of the valve is unfolded, and the proximal end is constricted within the first receiving portion 201). When the valve reaches the ideal position, the proximal end is finally released, resulting in more accurate post-release valve positioning and improved surgical quality.

[0059] In some exemplary implementations, such as Figure 2 As shown, the first drive 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 outer sheath assembly 20, and 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 receiving cavity 101 and cooperates with the proximal stop of the outer sheath assembly 20, so that the control member 62 can switch between a first position and a second position. When the control member 62 is in the first position (see...), Figure 2 and Figure 6 In the second position, the proximal end 20a of the outer sheath assembly 20 abuts against the control member 62, and the first elastic member 61 is compressed to apply an elastic force towards the proximal end to the mating member 22 of the outer sheath assembly 20. The control member 62 is used to prevent the outer sheath assembly 20 from moving towards the proximal end, and uses the elastic driving force of the first elastic member 61 to push the proximal end 20a of the outer sheath assembly 20 against the control member 62 so that the outer sheath assembly 20 remains fixed relative to the handle assembly 10 and the core tube assembly 30. When the control member 62 is in the second position (see [reference needed]), Figure 7 The proximal end 20a of the outer sheath assembly 20 separates from the control member 62. The first elastic member 61 extends and drives the outer sheath assembly 20 to move proximally relative to the handle assembly 10, thereby moving the outer sheath assembly 20 from a third position to a fourth position, thus releasing the proximal end of the valve. In this embodiment, the elastic force of the first elastic member 61 can be used to drive the movement of the outer sheath assembly 20 simply by moving the control member 62 from the first position to the second position, making the valve release operation simple and quick.

[0060] In one exemplary implementation, please refer to Figure 2 and Figure 5As shown, the control element 62 includes a connected main body 621 and a pressing part 622. The main body 621 is movably disposed in the receiving cavity 101, and the pressing part 622, with one end away from the main body 621, passes through the first housing 11 and is located outside the receiving cavity 101. Therefore, during the release of the valve, it is only necessary to press the pressing part 622 outside the receiving cavity 101 to move the main body 621 from the first position to the second position to release the proximal end of the valve. The operation is simple and quick, which helps to shorten the operation time and reduce the surgical risk.

[0061] In this embodiment, such as Figure 4 and Figure 5 As shown, the first drive assembly 60 also includes a second elastic element 64. At least one first spring sleeve post 6213 is provided on the main body 621, and a second spring sleeve post 122 is provided on the second housing 12 opposite to the first spring sleeve post 6213 (see reference). Figure 11 The second elastic member 64 has its two ends sleeved on the first spring sleeve post 6213 and the second spring sleeve post 122, and its two ends abut against the main body 621 and the second housing 12, respectively. When the second elastic member 64 is compressed, its elastic driving force pushes the main body 621 against the inner wall of the first housing 11, at which point the control member 62 can remain in the first position. When the pressing part 622 is pressed, under the action of external force, the main body 621 moves towards the side closer to the second housing 12, thereby moving the control member 62 to the second position. In this embodiment, during the release of the valve, only the pressing part 622 needs to be pressed outside the receiving cavity 101 to move the main body 621 from the first position to the second position to release the proximal end of the valve. The operation is simple and quick, which helps to shorten the operation time and reduce the surgical risk.

[0062] In other embodiments, a first snap-fit ​​structure (not shown in the figure) and a second snap-fit ​​structure (not shown in the figure) are provided at intervals on the first housing 11 or the second housing 12. The main body 621 is provided with a third snap-fit ​​structure (not shown in the figure). The third snap-fit ​​structure can snap with the first snap-fit ​​structure and the second snap-fit ​​structure respectively. When the third snap-fit ​​structure snaps with the first snap-fit ​​structure, the control member 62 is in a first position. When the third snap-fit ​​structure snaps with the second snap-fit ​​structure, the control member 62 is in a second position. The first and second snap-fit ​​structures can be slots, and the third snap-fit ​​structure is a buckle that engages with the slots. By snapping, the control member 62 is in a snap-fit ​​state in both the first and second positions, ensuring a relatively secure locking state and reducing the probability of valve dislodgement due to accidental contact with the control member 62 during valve implantation.

[0063] Furthermore, such as Figure 2As shown, the outer sheath assembly 20 includes an outer sheath tube 21 and a mating member 22. Specifically, the outer sheath tube 21 is sleeved outside the core tube assembly 30, and the proximal end of the outer sheath tube 21 is movably disposed in the receiving cavity 101. The mating member 22 is disposed within the receiving cavity 101 and sleeved outside the outer sheath tube 21, located at the proximal end 21a of the outer sheath tube 21. The mating member 22 includes a first stop portion 2211 located at the distal end (see reference). Figure 9 ) and the second stop 224 located at the proximal end (see reference) Figure 8 The first elastic element 61 is sleeved outside the outer sheath tube 21, and the distal end of the first elastic element 61 extends from the inner wall of the distal end of the first housing 11 to form a stop 110 (see reference). Figure 12 ) and the stop 120 extending from the inner wall of the distal end of the second housing 12 (see reference) Figure 11 The proximal end of the first elastic member 61, which is in a compressed state, abuts against the first stop portion 2211, and the main body portion 621 of the control member 62 stops and engages with the second stop portion 224. In other embodiments, the engaging member 22 may be omitted, and the first stop portion 2211 and the second stop portion 224 may be directly provided at the proximal end portion 21a of the outer sheath tube 21.

[0064] The first elastic element 61 can be a helical spring or a spring sheet, etc. In this embodiment, by setting the mating part 22 to abut against the first elastic element 61 and the control part 62 respectively, and using the first elastic element 61 as the driving force for the movement of the outer sheath tube 21, the overall structure of the delivery device 100 is compact, thereby reducing production costs and simplifying operation, which is beneficial for simplifying surgical procedures and shortening surgical time. In other embodiments, the distal end of the first elastic element 61 abuts 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. The side of the first housing 11 and the second housing 12 near the distal end is configured with a tapered structure so that the diameter of the accommodating cavity 101 near the distal end is smaller than the diameter of the first elastic element 61, so that the distal end of the first elastic element 61 can abut against the inner wall of the first housing 11 and the second housing 12.

[0065] In one exemplary implementation, such as Figure 8 and Figure 9As shown, the mating component 22 is tubular in shape and includes a first stepped structure 221, a second stepped structure 222, and a third stepped structure 223 arranged sequentially from the distal end to the proximal end, with decreasing diameters. The proximal end of the outer sheath 21 is inserted into and fixedly connected to the second stepped structure 222. A first stepped surface 2212 is formed between the first stepped structure 221 and the second stepped structure 222, and a second stepped surface 2221 is formed between the second stepped structure 222 and the third stepped structure 223. A first stop portion 2211 is formed on the distal end face of the first stepped structure 221, protruding from the outer wall surface of the outer sheath 21 so that the proximal end of the first elastic member 61 abuts against the first stop portion 2211. The second stop portion 224 is a protruding structure provided on the outer peripheral surface of the proximal end of the third stepped structure 223. In other embodiments, the proximal end of the outer sheath 21 can be directly connected and fixed to the distal end of the mating member 22.

[0066] Please combine Figures 8-11 As shown, the inner wall of the second housing 12 is provided with a first rib 121 extending circumferentially. The first rib 121 is located at the distal end of the control member 62. The mating member 22 passes through the first rib 121 and can move axially relative to the first rib 121. When the mating member 22 moves to the proximal end, the second stepped structure 222 can abut against the distal end of the first rib 121. When the mating member 22 moves to the distal end, the second stop 224 can abut against the proximal end of the first rib 121. The first rib 121 is used to limit the movement range of the outer sheath assembly 20, so as to facilitate precise control of the movement range of the outer sheath tube 21 and make the valve release process more accurate.

[0067] See Figure 11 The inner wall of the second housing 12 is provided with a second rib 124 extending circumferentially. It is understood that the inner wall of the first housing 11 also has a rib that mates with the second rib 124. The second rib 124 has an opening in the middle to facilitate the passage of the mating part 22. The mating part 22 is positioned between the first rib 121 and the second rib 124 to prevent the mating part 22 from moving axially along the handle assembly.

[0068] In some implementations, such as Figure 8 and Figure 11 As shown, the first rib 121 is provided with a first guide groove 1211, and the outer peripheral surface of the third stepped structure 223 is provided with a first guide rib 2231. The first guide rib 2231 and the first guide groove 1211 are slidably engaged, and both the first guide rib 2231 and the first guide groove 1211 extend in the axial direction. The engagement of the first guide rib 2231 and the first guide groove 1211 limits the movement direction of the outer sheath assembly 20 and prevents the mating part 22 and the outer sheath tube 21 from rotating in the circumferential direction relative to the handle assembly 10 and the core tube assembly 30.

[0069] Alternatively, in other embodiments, the first guide groove is disposed on the third step structure, and the first guide rib is disposed on the first rib.

[0070] Furthermore, in this embodiment, please refer to... Figures 5 to 7 As shown, the main body 621 has a first guide hole 6211, and the mating member 22 passes through the first guide hole 6211. A boss 6212 is provided on the inner wall of the first guide hole 6211 on the side opposite to the pressing part 622. The boss 6212 engages with the second stop part 224. When the outer 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 located within the first guide hole 6211, and the end face of the proximal end of the second stop part 224 abuts against the distal end face of the boss 6212, thereby locking the outer sheath assembly 20. When the pressing part 622 is pressed, the boss 6212 moves toward the side away from the pressing part 622. When the control member 62 is in the second position, the end face of the proximal end of the second stop part 224 disengages from the end face of the far end of the boss 6212. At this time, the outer sheath assembly 20 is in the unlocked state. Driven by the elastic force of the first elastic member 61, the second stop part 224 passes through the first guide hole 6211 and moves toward the proximal side until the outer sheath assembly 20 moves to the fourth position and completely releases the proximal end of the valve.

[0071] In this embodiment, please refer to Figure 2 and Figure 4 As shown, the second drive assembly 70 includes a screw 71 and a knob 72. The screw 71 has an external thread and is fixedly connected to the proximal end of the inner rod 50. The knob 72 has an internal thread that mates with the external thread of the screw 71. 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 accommodating cavity 101 near the proximal end (see reference). Figure 11 and Figure 12 The knob 72 has an annular protrusion 721 near its distal end on its outer peripheral surface, which mates with the annular groove 1011. The annular protrusion 721 extends into the annular groove 1011 and can rotate circumferentially, allowing the knob 72 to rotate circumferentially. The engagement of the annular groove 1011 and the annular protrusion 721 prevents the knob 72 from moving axially. The axes of the screw 71 and the knob 72 are parallel to the axis of the handle assembly 10. When the knob 72 is rotated forward, it drives the screw 71 to move axially towards the proximal end, thereby moving the inner rod 50 and the receiving head 40 towards the proximal end. When the knob 72 is rotated backward, it drives the screw 71 to move axially towards the distal end, thereby moving the inner rod 50 and the receiving head 40 towards the distal end.

[0072] See Figure 2 , Figure 4 and Figure 14The conveyor also includes a guide member 13, which is disposed within the accommodating cavity 101 and located near the proximal end of the accommodating cavity 101. The guide member 13 is fixedly connected to the first housing 11 and the second housing 12, respectively. The guide member 13 has an overall tubular structure so that the inner rod can pass through the guide member 13 and connect to the second drive assembly. The guide member 13 includes a connecting hole 1321 and a second guide hole 1311 that extend axially and are arranged sequentially and communicate with each other. The connecting hole 1321 is located at the distal end relative to the second guide hole 1311. The proximal end of the core tube assembly 30 is sleeved and fixed in the connecting hole 1321, and the distal end of the screw 71 extends into the second guide hole 1311.

[0073] Among them, such as Figure 15 and Figure 16 As shown, the screw 71 is provided with a second guide groove 711 extending axially. The second guide groove 711 passes through the external threads on the multiple screws 71. The inner wall of the second guide hole 1311 is provided with a second guide rib 1312 that slides with the second guide groove 711. Both the second guide groove 711 and the second guide rib 1312 extend axially. The cooperation of the second guide groove 711 and the second guide rib 1312 prevents the screw 71 from rotating in the circumferential direction relative to the handle assembly 10, so as to ensure that the screw 71 moves in the axial direction when the knob 72 is rotated.

[0074] In this embodiment, please refer to Figure 2 and Figure 14 As shown, the guide member 13 includes a body portion 131 and a tubular guide portion 132 located at the distal end of the body portion 131. The mating member 22 is tubular and movably fitted onto the tubular guide portion 132, so as to further constrain the movement direction of the mating member 22 through the tubular guide portion 132. The mating between the outer peripheral surface of the tubular guide portion 132 and the inner wall surface of the mating member 22 prevents the mating member 22 from shaking in the circumferential direction, making the mating member 22 more stable when moving in the axial direction. The outer peripheral surface of the tubular guide portion 132 near the distal end is set as a tapered surface. The guiding effect of the tapered surface is used to facilitate the insertion of the mating member 22 into the tubular guide portion 132.

[0075] In this embodiment, please refer to Figure 2 and Figure 17 As shown, the core tube assembly 30 includes a core tube 31 and a fixing member 32. The proximal end of the core tube 31 is connected to the handle assembly 10. Specifically, the proximal end of the core tube 31 is inserted into the connection hole 1321 of the guide member 13 (see reference). Figure 14The core tube 31 is fixedly connected to the guide 13. The fixing member 32 is sleeved outside the core tube 31 and located at the distal end of the core tube 31. Along the circumferential direction, the fixing member 32 and the distal end of the outer sheath tube 21 define a first receiving part 201. The fixing member 32 is provided with a plurality of toothed protrusions 321 arranged sequentially and spaced along the circumference of the fixing member 32. The toothed protrusions 321 are used to hook and connect with the proximal support of the valve to prevent the proximal end of the valve from detaching from the first receiving part 201 after the distal end of the valve is released. This facilitates the continued adjustment of the valve position by pulling or pushing the outer sheath assembly 20 and the core tube assembly 30 after the distal end of the valve is released, thereby improving the accuracy of valve delivery.

[0076] According to an embodiment of the present invention, a delivery system 200 is also provided, which includes a medical device 2001 (e.g., a valve) and a delivery device 100, wherein the proximal end of the medical device is housed in a first receiving portion and the distal end of the medical device is housed in a second receiving portion. The delivery system and delivery device proposed in this invention have the same technical effects, and will not be described in detail here.

[0077] It should be noted that the surgical method applicable to the delivery device 100 and delivery system 200 in this embodiment of the invention requires first performing surgery to expose the target implantation site, and then using the delivery device 100 and delivery system 200 to implant the medical device into the target implantation site. Compared with conventional surgical replacement surgery, it can inherit the advantages of surgical replacement surgery, such as precision, and reduce the time required for current surgical procedures.

[0078] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A conveyor for conveying medical devices, characterized in that, The conveyor includes: Handle assembly; A core tube assembly, the proximal end of which is connected to the handle assembly; An outer sheath assembly is sleeved over the core tube assembly, and a first receiving portion is defined between the distal end of the outer sheath assembly and the core tube assembly in the circumferential direction; An inner rod is disposed inside the core tube assembly, and the distal end of the inner rod extends out of the distal end of the core tube assembly; A receiving head is connected to the distal end of the inner rod, and the receiving head is axially spaced from the distal end of the outer sheath assembly. A second receiving portion is provided at the proximal end of the receiving head. The handle assembly includes a first housing and a second housing, which are detachably connected to each other, so that the first housing and the second housing form a hollow tubular structure and form an accommodating cavity between the first housing and the second housing; The conveyor also includes: A first drive assembly is disposed in the receiving cavity and connected to the outer sheath assembly. The first drive assembly is used to drive the outer sheath assembly to move proximally relative to the core tube assembly to release the proximal end of the medical device. The first driving component includes: A first elastic element is connected to the outer sheath assembly in a compressed state. A control element is movably disposed in the receiving cavity and engages with the proximal stop of the outer sheath assembly, such that the control element can switch between a first position and a second position; In the first position, the proximal end of the outer sheath assembly abuts against the control member, and the first elastic member is in a compressed state to apply an elastic force toward the proximal end of the outer sheath assembly; In the second position, the proximal end of the outer sheath assembly is separated from the control member, and the first elastic member extends and drives the outer sheath assembly to move toward the proximal end.

2. The conveyor according to claim 1, characterized in that, The conveyor also includes: A second drive assembly, connected to the proximal end of the inner rod, is used to drive the inner rod to move axially relative to the core tube assembly to push the receiving head away from the core tube assembly and release the distal end of the medical device.

3. The conveyor according to claim 1, characterized in that, The outer sheath assembly includes: Outer sheath; A fitting is sleeved on the proximal end of the outer sheath tube, the fitting including a first stop portion located at the distal end and a second stop portion located at the proximal end; Wherein, the proximal end of the first elastic member in the compressed state abuts against the first stop portion; The control component engages with the second stop.

4. The conveyor according to claim 3, characterized in that, The mating component includes a first stepped structure, a second stepped structure, and a third stepped structure arranged sequentially from the distal end to the proximal end with decreasing diameters. The distal end face of the first stepped structure forms the first stop portion. The second stop portion is a protruding structure provided on the outer peripheral surface of the proximal end of the third stepped structure. The proximal end of the outer sheath tube passes through the mating component from the distal end of the mating component and is fixedly connected to the mating component.

5. The conveyor according to claim 4, characterized in that, The inner wall of the second housing is provided with a first rib extending circumferentially. The first rib is located at the distal end of the control member. The mating member passes through the first rib and can move axially relative to the first rib. When the mating member moves to the proximal end, the second stepped structure can abut against the distal end of the first rib. When the mating member moves to the distal end, the second stop portion can abut against the proximal end of the first rib.

6. The conveyor according to claim 5, characterized in that, One of the first rib and the third stepped structure is provided with a first guide groove, and the other of the two is provided with a first guide rib that slides in cooperation with the first guide groove. Both the first guide rib and the first guide groove extend in the axial direction.

7. The conveyor according to claim 1, characterized in that, The control component is provided with a first guide hole, and the proximal end of the outer sheath assembly can pass through the first guide hole axially. The inner wall of the first guide hole is provided with a boss, and the boss cooperates with the proximal end stop of the outer sheath assembly. The control component is also provided with a second elastic element, which is in a compressed state and drives the control component to move vertically along the axis, so that the proximal end of the outer sheath assembly abuts against the boss.

8. The conveyor according to claim 2, characterized in that, The second driving component includes: A screw, which is fixedly connected to the proximal end of the inner rod; A knob is rotatably threaded onto the screw, and the knob is capable of driving the screw to move axially.

9. The conveyor according to claim 8, characterized in that, The conveyor further includes a guide member, which includes a connecting hole and a second guide hole that extend axially and are arranged sequentially and communicate with each other. The connecting hole is located at the distal end relative to the second guide hole. The proximal end of the core tube assembly is sleeved and fixed in the connecting hole, and the distal end of the screw extends into the second guide hole.

10. The conveyor according to claim 9, characterized in that, 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 rib that slides in conjunction with the second guide groove.

11. The conveyor according to claim 1, characterized in that, The core tube assembly includes: Core tube; A fastener is connected to the distal end of the core tube; In the circumferential direction, the first receiving portion is defined between the fixing member and the distal end of the outer sheath assembly, and the fixing member is provided with a plurality of toothed protrusions arranged sequentially at intervals along the circumference of the fixing member, the toothed protrusions being used for hooking and connecting with the proximal end of the medical device.

12. A conveying system, characterized in that, include: The conveyor as described in any one of claims 1-11; A medical device, wherein the proximal end of the medical device is housed in a first housing portion, and the distal end of the medical device is housed in a second housing portion.

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