A delivery assembly and delivery system
By combining the sheath, delivery device, limiting device, and connecting wire, the problem of poor compliance of the delivery device in blood vessels is solved, the adjustability and accurate release of the delivery device are realized, and the implantation accuracy of the pulmonary embolism filter is improved.
Patent Information
- Application Number
- CN202211694324.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-28
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2042-12-28
Smart Images
Figure CN118252647B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical devices, in particular to a delivery assembly and a delivery system. BACKGROUND
[0002] Pulmonary embolism is a disease caused by the blocking of tissue blood supply due to the entry of embolic material into the pulmonary artery and its branches. The mortality rate of pulmonary embolism is high. According to statistics, the mortality rate of pulmonary embolism without treatment is as high as 20%-30%. At present, implanting a vena cava filter (hereinafter referred to as a filter) to prevent pulmonary embolism has been proven to be a safe and effective means in clinical practice, which can effectively reduce the incidence of pulmonary embolism.
[0003] Generally, the filter needs to be delivered to the position where the inferior vena cava and the renal vein are flush by the delivery device, and released. In the related art, the filter and the delivery device are usually connected by threads, buckles or not connected directly. However, for the rigid connection mode such as thread connection or buckle connection, the compliance of the delivery device in the blood vessel is limited, which can easily cause the position deviation of the filter after release; for the mode that the filter is not connected with the delivery device and is directly pushed out, the filter will jump forward obviously during the release process, and if the filter is not implanted in the preset position, the position of the filter cannot be adjusted. SUMMARY
[0004] Therefore, the present application provides a delivery assembly, which has good compliance in the blood vessel, the position of the to-be-delivered member after release is not prone to deviation, and the position of the to-be-delivered member can be adjusted if it is not implanted in the preset position.
[0005] The delivery assembly is used for delivering a to-be-delivered member, and comprises:
[0006] a sheath tube;
[0007] a delivery member accommodated in the sheath tube, a distal end of the delivery member being capable of extending out of a distal end of the sheath tube when the sheath tube moves proximally, the delivery member comprising a containing cavity with an opening at a proximal end, and a first through hole and a second through hole communicated with the containing cavity;
[0008] a limiting member, a distal end of the limiting member being capable of extending into the containing cavity through the opening, and the limiting member being capable of reciprocating in the containing cavity along a first direction, wherein the first direction is parallel to the length direction of the delivery member;
[0009] a connecting wire comprising a first section, a second section, and a hanging section located between the first section and the second section;
[0010] In the first state, the first section and the second section are located in the accommodating cavity, the hanging section is located outside the conveying member, the hanging section outside the conveying member is used for hanging the member to be conveyed, and the second section is sleeved on the limiting member to limit the member to be conveyed from being separated from the connecting wire;
[0011] In the second state, the limiting member moves towards the proximal end to be separated from the second section, so that the second section can exit to the outside of the conveying member through the second through hole, and the hanging section is separated from the member to be conveyed.
[0012] In one of the embodiments, the first through hole is located at the distal end wall of the conveying member, and the second through hole is located at the side wall of the conveying member.
[0013] In one of the embodiments, the conveying assembly includes a plurality of connecting wires, and a plurality of second through holes corresponding to the plurality of connecting wires are arranged at intervals on the side wall of the conveying member.
[0014] In the first state, the distal end of the limiting member can extend out through the first through hole and into the member to be conveyed.
[0015] In one of the embodiments, the conveying assembly further includes a centering member located in the accommodating cavity, the centering member has a cavity with a cavity opening at the proximal end inside, and the centering member is provided with a third through hole communicating with the cavity, the distal end of the centering member can extend out through the first through hole and into the member to be conveyed.
[0016] In the first state, the connecting wire in the accommodating cavity passes through the cavity and the third through hole in sequence and then passes into the accommodating cavity through the second through hole, and the part of the connecting wire between the third through hole and the second through hole is used for hanging the member to be conveyed.
[0017] In one of the embodiments, the distal end of the limiting member can extend into the cavity through the cavity opening.
[0018] The centering member is configured to slide in the accommodating cavity by being pushed by the limiting member, so that the distal end of the centering member extends out through the first through hole,
[0019] Alternatively, the centering member is elastic, the proximal end of the centering member is fixedly connected to the cavity wall of the accommodating cavity, and the distal end of the centering member is configured to extend out through the first through hole by being pushed by the limiting member and overcoming the elastic force of itself.
[0020] In one of the embodiments, the third through hole is located at the distal end wall of the centering member.
[0021] In one of the embodiments, the first portion of the connecting wire is bent relative to the second portion to form a loop capable of being sleeved on the limiting member;
[0022] The centering member is provided with two third through holes for the first portion and the second portion to pass through the cavity respectively, so that the loop is located outside the centering member, and the centering member is configured to be retracted into the accommodating cavity by pulling the proximal ends of the first portion and the second portion.
[0023] In one of the embodiments, the two portions of the connecting wire are bent relative to each other to form a loop capable of being sleeved on the limiting member;
[0024] Alternatively, one end of the connecting wire is in a crimped shape to form a loop capable of being sleeved on the limiting member;
[0025] Alternatively, the connecting wire comprises a loop portion capable of being sleeved on the limiting member, and a wire-shaped portion wound and fixed to the loop portion.
[0026] In the above delivery assembly, the delivery member is accommodated in the sheath, and thus can be delivered into the body by the sheath. When the sheath moves proximally, the distal end of the delivery member can extend out of the distal end of the sheath. The delivery member comprises an accommodating cavity with an opening at the proximal end, and a first through hole and a second through hole communicating with the accommodating cavity. The limiting member can extend into the accommodating cavity through the opening and move reciprocally in the accommodating cavity. The connecting wire comprises a first section and a second section, and a hanging section between the first section and the second section. The first through hole and the second through hole form a hanging path outside the delivery member, i.e., the first through hole and the second through hole are respectively at the beginning and the end of the delivery path. In the first state, the first section and the second section of the connecting wire are both located in the accommodating cavity, and the hanging section can be hung on the to-be-delivered member to achieve connection with the to-be-delivered member. The limiting member is sleeved on the second section, which can limit the second section from exiting the second through hole, and thus limit the hanging section from detaching from the to-be-delivered member. In the second state, when the limiting member moves proximally to separate from the second section, the limitation on the second section is released, the second section can exit the second through hole to the outside of the delivery member, and the hanging section can be separated from the to-be-delivered member, thereby releasing the to-be-delivered member. Compared with conventional rigid connection, in the delivery assembly, the to-be-delivered member is hung by the hanging section of the connecting wire, which can make the two have a relative freedom of movement, so that the delivery assembly has better compliance when delivering in the blood vessel, and thus can reduce the positional deviation of the to-be-delivered member after being released due to poor compliance. Compared with the conventional direct ejection of the to-be-delivered member, in the delivery assembly, the to-be-delivered member is hung by the hanging section of the connecting wire, and thus if the release position of the to-be-delivered member is not ideal, the position of the delivery assembly can be adjusted to improve the accuracy of the release position.
[0027] The present invention also proposes a conveying system, including the above-described conveying components, and further including the item to be conveyed;
[0028] In the first state, the attachment section is attached to the component to be transported; in the second state, the attachment section is separated from the component to be transported.
[0029] In one embodiment, the item to be transported includes a main body and a hook, the hook including a hook and a connecting part, the main body being connected to the far end of the connecting part, the hook being connected to the near end of the connecting part, a notch being formed between the hook and the main body, the hook being hollow inside, and the hooking section passing through the notch through the hook to achieve hooking.
[0030] The above-mentioned conveying system, by applying the above-mentioned conveying components, ensures that the position of the conveyed item is not easily deviated after it is released, and that the position of the conveyed item can be adjusted if it is not placed in the preset position. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the connection between the conveying component and the item to be conveyed in one embodiment of this application;
[0032] Figure 2 for Figure 1 A schematic diagram of the conveying assembly detached from the item to be conveyed in the Chinese embodiment;
[0033] Figure 3 This is a schematic diagram of the conveying component in a first state according to an embodiment of this application;
[0034] Figure 4 This is a schematic diagram of the conveying component in the second state according to an embodiment of this application;
[0035] Figure 5 This is a schematic diagram of the connection between the conveying component and the part to be conveyed in one embodiment of this application;
[0036] Figure 6 for Figure 1 A schematic diagram of the second section of the connecting wire after it has come out of the second through hole in the embodiment;
[0037] Figure 7 for Figure 1 A schematic diagram of the embodiment after the connecting wire's hanging section and the second section have both retracted into the receiving cavity;
[0038] Figure 8 This is a schematic diagram of the connection between the conveying component and the item to be conveyed in one embodiment of this application;
[0039] Figure 9 for Figure 8 A schematic diagram of the second section of the connecting wire after it has come out of the second through hole in the embodiment;
[0040] Figure 10 For Figure 8 The schematic view of the centering piece and the to-be-conveyed piece in the embodiment of the application after being separated;
[0041] Figure 11 The schematic view of the connecting wire forming a sleeve ring and sleeving the limiting piece in an embodiment of the application;
[0042] Figure 12 The schematic view of the connecting wire forming a sleeve ring and sleeving the limiting piece in an embodiment of the application;
[0043] Figure 13 The structural schematic view of the connecting wire in an embodiment of the application;
[0044] Figure 14 The structural schematic view of the centering piece in an embodiment of the application.
[0045] Reference signs:
[0046] The to-be-conveyed piece 100, the main body 110, the hanging piece 120, the hook portion 121, the connecting portion 122, the notch 130;
[0047] The sheath 200;
[0048] The conveying piece 300, the accommodating cavity 310, the opening 311, the first through hole 320, the second through hole 330;
[0049] The limiting piece 400;
[0050] The connecting wire 500, the first section 510, the second section 520, the hanging section 530, the sleeve ring portion 541, the wire-shaped portion 542;
[0051] The centering piece 600, the cavity 610, the third through hole 620, the head portion 630. DETAILED DESCRIPTION
[0052] In order to make the above objectives, features and advantages of the application more apparent, specific embodiments of the application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the application. However, the application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the application, so the application is not limited to the specific embodiments disclosed below.
[0053] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0054] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application,
[0055] The meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.
[0056] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0057] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.
[0058] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0059] In this application, the end furthest from the operator is defined as the distal end, and the end closest to the operator is defined as the proximal end.
[0060] Figure 1 This is a schematic diagram showing the connection between the conveying component and the item to be conveyed in one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the conveying assembly detaching from the item to be conveyed in the Chinese embodiment; Figure 3 This is a schematic diagram of the conveying component in a first state according to an embodiment of this application; Figure 4 This is a schematic diagram of the conveying component in the second state according to an embodiment of this application.
[0061] See Figures 1 to 4 An embodiment of the present invention provides a conveying assembly for conveying a component 100 to be conveyed. The conveying assembly includes a sheath 200, a conveying component 300, a limiting component 400, and a connecting wire 500. The conveying component 300 is housed within the sheath 200, and its distal end can extend through the distal end of the sheath 200 when the sheath 200 moves towards its proximal end. The conveying component 300 includes a receiving cavity 310 with an opening 311 at its proximal end, and the conveying component 300 is provided with a first through hole 320 and a second through hole 330 communicating with the receiving cavity 310. The limiting component 400 extends into the receiving cavity 310 through the opening 311, and the limiting component 400 can reciprocate within the receiving cavity 310 along a first direction, wherein the first direction is parallel to the length direction of the conveying component 300. The connecting wire 500 includes a first section 510 and a second section 520, and a hooking section 530 located between the first section 510 and the second section 520. In the first state, the first section 510 and the second section 520 are located within the receiving cavity 310. The hooking section 530, located outside the conveying member 300, is used to hook with the item to be conveyed 100, and the second section 520 is sleeved on the limiting member 400 to prevent the item to be conveyed 100 from detaching from the hooking section 530. In the second state, the limiting member 400 moves proximally to separate from the second section 520, so that the second section 520 exits through the second through hole 330 to the outside of the conveying member 300, thereby separating the hooking section 530 from the item to be conveyed 100.
[0062] The distal end portion of the connecting wire 500 located in the accommodating cavity 310 extends out of the first through hole 320, and then re-enters the accommodating cavity 310 from the second through hole 330. Specifically, the second section 520 forms a loop which can be sleeved outside the limiting member 400. The distal end portion of the connecting wire 500 located in the accommodating cavity 310 is pulled out of the first through hole 320, and the portion still remains in the accommodating cavity 310, which is the first section 510. The distal end of the portion of the connecting wire 500 pulled out of the delivery member 300 re-enters the accommodating cavity 310 from the second through hole 330, which is the second section 520. At this time, the portion of the connecting wire 500 located outside the delivery member 300 is the hanging section 530.
[0063] Compared with the conventional rigid connection, in the above delivery assembly, the delivery member 100 is hung by the hanging section 530 of the connecting wire 500, so that the two have a relative activity freedom, so that the delivery assembly has better compliance when being delivered in the blood vessel, and thus the position deviation of the delivery member 100 after being released due to poor compliance can be reduced. Compared with the conventional direct ejection of the delivery member 100, in the above delivery assembly, the delivery member 100 is hung by the hanging section 530 of the connecting wire 500, and if the release position of the delivery member 100 is not ideal, the delivery assembly can be moved forward and backward to adjust the release position of the delivery member 100, thereby improving the accuracy of the release position.
[0064] Specifically, when the delivery member 100 is installed in the delivery assembly, the distal end portion of the connecting wire 500 extending into the accommodating cavity 310 is pulled out of the first through hole 320, and then re-enters the accommodating cavity 310 from the second through hole 330 after being hung on the delivery member 100, that is, the connection with the delivery member 100 is completed. After the second section 520 re-enters the accommodating cavity 310, the orientation of the loop of the second section 520 is adjusted to be aligned with the limiting member 400. The limiting member 400 moves distally to extend into the loop in the second section 520, that is, the second section 520 is sleeved outside the limiting member 400. Since the second section 520 is sleeved outside the limiting member 400 after re-entering the accommodating cavity 310, the second section 520 can be prevented from being pulled out of the second through hole 330, and thus the hanging section 530 can be prevented from being separated from the delivery member 100.
[0065] Figure 6 For Figure 1 Schematic view of the second section of the connecting wire in the embodiment after being pulled out of the second through hole; Figure 7 For Figure 1 Schematic view of the hanging section and the second section of the connecting wire in the embodiment after being retracted into the accommodating cavity.
[0066] Referring to Figure 1 , Figure 6 andFigure 7 After the connection is completed in vitro, the to-be-delivered member 100 is delivered to a preset position in the body by the delivery assembly, and the sheath 200 is retracted, so that the to-be-delivered member 100 is opened under the action of the elastic force of the to-be-delivered member 100 itself, and the distal end of the delivery member 300 is exposed. The limiting member 400 is retracted towards the proximal end until it is withdrawn from the loop of the second section 520, and then the second section 520 is withdrawn from the delivery member 300 under the action of the elastic force of the second section 520 itself. At this time, the proximal end of the first section 510 is pulled, so that the to-be-delivered member 100 is separated from the hanging section 530, thereby completing the release.
[0067] If the release position is not ideal, the delivery member 300, the limiting member 400 and the connecting wire 500 can be moved as a whole to move the to-be-delivered member 100 together to adjust the position thereof. Alternatively, the delivery member 300, the limiting member 400, the connecting wire 500 and the to-be-delivered member 100 can be kept in place, the sheath 200 is pushed towards the front end, the delivery member 300, the limiting member 400, the connecting wire 500 and the to-be-delivered member 100 are retracted into the sheath 200, and then the to-be-delivered member 100 is released again in the aforementioned manner.
[0068] Preferably, after the release is completed, the position of the delivery member 300 is kept unchanged, the proximal end of the first section 510 is continuously pulled, the hanging section 530 and the second section 520 are retracted towards the proximal end into the accommodation cavity 310, and then the delivery assembly is withdrawn from the body, so that the probability of scratching the inner wall of the blood vessel by the connecting wire 500 during the withdrawal from the body is reduced.
[0069] Referring to Figure 3 With Figure 4 In some embodiments, the first through hole 320 is located at the distal end wall of the delivery member 300, and the second through hole 330 is located at the side wall of the delivery member 300.
[0070] In the embodiment, the second through hole 330 is arranged at the side wall of the delivery member 300, so that the entrance of the loop of the second section 520 is towards the limiting member 400 after the second section 520 is inserted into the accommodation cavity 310 from the outside. Only the position of the limiting member 400 needs to be adjusted to align with the limiting member 400, and then the limiting member 400 is extended towards the distal end, so that the limiting member 400 is inserted into the loop, the operation difficulty is reduced, and the operation efficiency is improved.
[0071] Figure 12 It is a schematic view of the connecting wire forming a loop and sleeving the limiting member in an embodiment of the present application.
[0072] Referring to Figure 12 In other embodiments, the first through hole 320 and the second through hole 330 are both located at the side wall of the delivery member 300. Specifically, Figure 12In the shown embodiment, the first through hole 320 and the second through hole 330 are arranged at two ends of the conveying member 300 along the radial direction of the conveying member 300.
[0073] Referring to Figure 3 With Figure 4 In some embodiments, the conveying assembly includes a plurality of connecting wires 500, and the plurality of second through holes 330 corresponding to the plurality of connecting wires 500 are arranged on the side wall of the conveying member 300.
[0074] Specifically, in the embodiment shown in the drawings, two second through holes 330 are arranged on the side wall of the conveying member 300, and correspondingly, two connecting wires 500 can be arranged. The distal end portion of one of the connecting wires 500 extends from the first through hole 320, and then passes back into the accommodating cavity 310 from one of the second through holes 330 and is sleeved on the limiting member 400. The distal end portion of the other connecting wire 500 extends from the first through hole 320, and then passes back into the accommodating cavity 310 from the other second through hole 330 and is sleeved on the limiting member 400. The second sections 520 of the two connecting wires 500 can be respectively sleeved on different regions of the limiting member 400 along the length direction of the limiting member 400, so as to enhance the limiting and make the second sections 520 less likely to fall off from the limiting member 400.
[0075] Figure 11 A schematic view of the connecting wire forming a sleeve ring and sleeving on the limiting member in an embodiment of the present application; Figure 13 A structural schematic view of the connecting wire in an embodiment of the present application.
[0076] Referring to Figure 1 , Figure 2 With Figure 4 In some embodiments, two portions of the connecting wire 500 are relatively bent to form a sleeve ring capable of sleeving on the limiting member 400.
[0077] Specifically, the two portions of the distal end of the connecting wire 500 are folded to form a double-stranded wire, and a sleeve ring can be formed between the two folded portions. The folded region extends from the first through hole 320 and passes back into the accommodating cavity 310 from the second through hole 330 after being hung on the to-be-conveyed member 100, and the sleeve ring formed by folding is sleeved on the outside of the limiting member 400. At this time, the to-be-conveyed member 100 is hung by the double-stranded wire, and the hanging firmness is higher.
[0078] Referring to Figure 11 With Figure 12 In some embodiments, the distal end of the connecting wire 500 is in a curled shape to form a sleeve ring capable of sleeving on the limiting member 400.
[0079] Specifically, the distal end region of the connecting wire 500 is curled to form a loop, at this time, only single wire is led out from the first through hole 320, and after being hung on the to-be-delivered member 100, the single wire is led back into the accommodating cavity 310 from the second through hole 330, and the loop is sleeved outside the limiting member 400.
[0080] Referring to Figure 1 With Figure 13 In some embodiments, the connecting wire 500 comprises a loop part 541 capable of being sleeved on the limiting member 400, and a wire part 542 wound and fixed on the loop part 541.
[0081] Specifically, the wire part 524 is wound on the loop part 541, and both ends thereof are exposed outside the loop part 541, capable of forming double wires, the loop part 541 with a part of the double wires close to the loop part 541 is led out from the first through hole 320, and after the double wires are hung on the to-be-delivered member 100, the double wires are led back into the accommodating cavity 310 from the second through hole 330, and the loop part 541 is sleeved outside the limiting member 400. In other embodiments, the wire part 542 can also be fixed on the loop part 541 by welding, clamping, bonding or the like.
[0082] In any one of the embodiments of the present application, any one of the above structures of the connecting wire 500 can be selected.
[0083] Figure 5 FIG. 4 is a schematic view of the connection between the delivery assembly and the to-be-delivered member in an embodiment of the present application.
[0084] Referring to Figure 5 In some embodiments, in the first state, the distal end of the limiting member 400 can be led out from the first through hole 320 and extend into the to-be-delivered member 100.
[0085] It can be understood that when the second section 520 of the connecting wire 500 is led out from the distal end face of the limiting member 400 and exits the delivery assembly 300 outside through the second through hole 330, the elastic force of the second section 520 can cause the to-be-delivered member 100 to be deviated. In the embodiment, the proximal end of the limiting member 400 can be operated to make the distal end thereof extend outwards from the first through hole 320 and extend into the to-be-delivered member 100, so as to limit the position of the to-be-delivered member 100 and make the to-be-delivered member 100 be located as much as possible in the middle of the blood vessel. In addition, when the distal end of the limiting member 400 extends into the to-be-delivered member 100, the distance between the loop and the distal end face of the limiting member 400 is increased, the probability of the loop being led out from the distal end of the limiting member 400 is reduced, and the stability of the connection is improved.
[0086] The diameter of the limiting member 400 is d, the hole diameter of the hole on the to-be-conveyed member 100 into which the limiting member 400 extends is D, and d / D=k, preferably, k is in the range of 25%≤k≤85%. Understandably, if k is too large, the compliance during conveying is not good, and if k is too small, the effect of adjusting the centering of the to-be-conveyed member 100 is not good. When k meets the above range, the compliance and the centering effect can be considered. Further, 30%≤k≤50%.
[0087] Of course, in other embodiments, the distal end of the limiting member 400 can not extend into the to-be-conveyed member 100, as long as the collar can not fall off from the distal end of the limiting member 400 as much as possible.
[0088] The distance between the position on the limiting member 400 covered by the collar of the second section 520 and the distal end face of the limiting member 400 is S, and the diameter of the limiting member 400 is d, preferably, S>3d. In this way, the distance between the collar and the distal end face of the limiting member 400 is large, and the collar is not easy to fall off from the distal end face of the limiting member 400 after the collar is covered on the limiting member 400, which can improve the stability of the connection.
[0089] Figure 8 A schematic view of the connection of the conveying assembly and the to-be-conveyed member in an embodiment of the present application; Figure 9 A schematic view of the connection of the conveying assembly and the to-be-conveyed member in an embodiment of the present application; Figure 8 A schematic view of the second section of the connecting wire after being pulled out of the second through hole in an embodiment; Figure 10 A schematic view of the second section of the connecting wire after being pulled out of the second through hole in an embodiment; Figure 8 A schematic view of the centering member after being separated from the to-be-conveyed member in an embodiment; Figure 14 A schematic view of the centering member in an embodiment of the present application.
[0090] Refer to Figure 8 And Figure 14 In some embodiments, the conveying assembly further comprises a centering member 600 located in the accommodating cavity 310, the inside of the centering member 600 is provided with a cavity 610 with a cavity opening at the proximal end, and the centering member 600 is provided with a third through hole 620 communicating with the cavity 610, and the distal end of the centering member 600 can extend out of the first through hole 320 and extend into the to-be-conveyed member 100. In the first state, the connecting wire 500 in the accommodating cavity 310 sequentially passes through the cavity 610 and the third through hole 620 and then passes into the accommodating cavity 310 through the second through hole 330, and the part of the connecting wire 500 between the third through hole 620 and the second through hole 330 is used to hang the to-be-conveyed member 100.
[0091] Specifically, the centering member 600 is located on the distal side of the limiting member 400. The distal end portion of the connecting wire 500 in the accommodating cavity 310 can pass into the cavity 610 and pass out through the third through hole 620, and after being hung on the to-be-conveyed member 100, it is passed back into the accommodating cavity 310 through the second through hole 330 and is sleeved outside the limiting member 400. The aforementioned hanging section 530 includes a part that extends to the outside of the conveying member 300 through the first through hole 320 and extends into the cavity 610, and a part between the third through hole 620 and the second through hole 330, at this time, the part of the hanging section 530 between the third through hole 620 and the second through hole 330 is used to hang the to-be-conveyed member 100.
[0092] Referring to Figure 8 and Figure 14 In some embodiments, the third through hole 620 is arranged at the distal end wall of the centering member 600.
[0093] In other embodiments, the third through hole 620 can also be arranged at the side wall of the centering member 600.
[0094] In the present embodiment, similar to the limiting member 400 extending into the to-be-conveyed member 100, the position of the to-be-conveyed member 100 can be limited by the centering member 600 extending into the to-be-conveyed member 100, so that the to-be-conveyed member 100 is located as much as possible in the middle of the blood vessel.
[0095] Referring to Figures 8 to 10 In some embodiments, the first portion is bent relative to the second portion on the connecting wire 500 to form a sleeve ring capable of being sleeved on the limiting member 400 between the two. The centering member 600 is provided with two third through holes 620 for the first portion and the second portion to pass into the cavity 610 respectively, so that the sleeve ring is located outside the centering member 600. The centering member 600 is configured to be withdrawn into the accommodating cavity 310 by pulling the proximal ends of the first portion and the second portion.
[0096] Referring to Figures 8 to 10, specifically, when the to-be-delivered member 100 is connected to the delivery assembly, the two portions (i.e., the first portion and the second portion) of the connecting wire 500 are folded to form a loop therebetween. Then, the two portions are respectively inserted into the cavity 610 from the outside to the inside through the two third through holes 620. At this time, the portion of the connecting wire 500 left outside the centering member 600 between the two third through holes 620 is the second section 520 and the hooking section 530. When the to-be-delivered member 100 is released, the sheath 200 is retracted, so that the to-be-delivered member 100 is opened under the action of its own elastic force, and the distal end of the delivery member 300 is exposed. The limiting member 400 is retracted towards the proximal end until it is withdrawn from the loop of the second section 520, and then the second section 520 is withdrawn from the delivery member 300 under the action of its own elastic force. The proximal end of the first section 510 is pulled to release the to-be-delivered member 100 from the hooking section 530, thereby completing the release. After the release is completed, the position of the delivery member 300 is kept unchanged, and the proximal end of the first section 510 is continuously pulled to gradually move the hooking section 530 and the second section 520 towards the third through holes 620. As described above, the connecting wire 500 is selected to form a loop by folding, so that a part of the two wires is finally hung outside the centering member 600 between the two third through holes 620. At this time, the proximal end of the two wires is pulled to pull the centering member 600 back into the accommodation cavity 310, and then the delivery assembly is withdrawn together to the outside of the body.
[0097] Figure 14 In the illustrated embodiment, the connecting wire 500 is selected to form a loop by folding as in the foregoing embodiment. Correspondingly, the centering member 600 is provided with two third through holes 620 and two cavities 610. The two wires after folding are respectively inserted from the outside to the inside through the two third through holes 620 and into the corresponding cavities 610. Figures 8 to 10 In the illustrated embodiment, the centering member 600 is provided with a large-size cavity for accommodating the two wires after folding. The two third through holes 620 are both communicated with the cavity. In other embodiments, only one third through hole with a larger diameter can be provided for the two wires after folding to pass through.
[0098] Referring to Figures 8 to 10 In some embodiments, the distal end of the limiting member 400 can extend into the cavity 610 through the lumen. The centering member 600 is configured to slide in the accommodation cavity 310 by being pushed by the limiting member 400, so that the distal end of the centering member 600 extends out of the first through hole 320.
[0099] Specifically, the proximal end of the limiting member 400 is operated to make the distal end thereof enter the cavity 610 and abut against the cavity wall of the cavity 610, thereby pushing the distal end portion of the centering member 600 out of the first through hole 320. When the centering member 600 needs to be withdrawn into the accommodation cavity 310, the proximal end of the connecting wire 500 is pulled.
[0100] Alternatively, referring to Figure 14 In some embodiments, the centering member 600 is elastic, the proximal end of the centering member 600 is fixedly connected to the cavity wall of the accommodating cavity 310, and the distal end of the centering member 600 is configured to be pushed by the limiting member 400 to overcome the elastic restoring force of the centering member 600 to extend out of the first through hole 320.
[0101] Specifically, the diameter of the proximal end of the centering member 600 is larger than the diameter of other regions of the centering member 600, so as to form a head 630 with a larger size at the proximal end of the centering member 600. The head 630 is fixedly connected to the cavity wall of the accommodating cavity 310 by bonding, welding or the like. The centering member 600 has elasticity in part or all of the axial direction of the centering member 600, so that the distal end of the centering member 600 can be elastically stretched outward relative to the head 630. The proximal end of the limiting member 400 is operated to make the distal end of the limiting member 400 enter the cavity 610 and abut against the cavity wall of the cavity 610, thereby pushing the distal end portion of the centering member 600 out of the first through hole 320. At this time, the centering member 600 is in a stretched and deformed state. When the external force applied to the limiting member 400 decreases or disappears, the distal end portion of the centering member 600 will automatically retract towards the proximal end under the action of the elastic restoring force of the centering member 600, without the need to pull the proximal end of the connecting wire 500. In addition, if the limiting member 400 and the centering member 600 are adhered, when the limiting member 400 is withdrawn from the cavity 610 towards the proximal end, the centering member 600 will not be withdrawn together with the limiting member 400, because the proximal end of the centering member 600 is fixed to the cavity wall of the accommodating cavity 310.
[0102] Alternatively, referring to Figures 8 to 10 In some embodiments, the delivery system includes the delivery assembly in any of the foregoing embodiments, and further includes the to-be-delivered member 100. In the first state, the hooking section 530 is hooked to the to-be-delivered member 100; in the second state, the hooking section 530 is separated from the to-be-delivered member 100.
[0103] Specifically, the to-be-delivered member 100 is a filter in the embodiment of the drawings, and can also be a similar component in other embodiments.
[0104] Alternatively, referring to Figure 7 In some embodiments, the to-be-delivered member 100 includes a main body 110 and a hooking member 120, the hooking member 120 includes a hook portion 121 and a connecting portion 122, the main body 110 is connected to the distal end of the connecting portion 122, the hook portion 121 is connected to the proximal end of the connecting portion 122, a gap 130 is formed between the hook portion 121 and the main body 110, the hook portion 121 is hollow inside, and the hooking section 530 passes through the hook portion 121 through the gap 130 to achieve hooking.
[0105] Specifically, the hooking section 530 passes through the hollow region inside the hook portion 121 from the gap 130 towards the proximal end, thereby hooking the to-be-delivered member 100 to the hooking section 530.
[0106] Alternatively, referring to Figure 8 andFigure 12 In other embodiments, the hitching section 530 can also hitch on other pre-set holes, slots, hooks or similar structures on the to-be-conveyed member 100.
[0107] Preferably, the connecting wire 500 in the present application should have good flexibility and tensile resistance to achieve the purposes of improving the compliance in the cavity and reliable connection.
[0108] Preferably, the limiting member 400 should also have certain flexibility to adapt to the twisted shape and direction of the blood vessel.
[0109] Preferably, the conveying member 300 is made of steel cable, of course, it can also be made of other metal or non-metal materials.
[0110] Preferably, the centering member 600 can be made of elastic materials such as silica gel and spring tube, or rigid materials such as stainless steel and titanium alloy.
[0111] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.
[0112] The above-described embodiments only express several implementation manners of the present application, the description is relatively specific and detailed, however, it should not be understood as the limitation of the scope of the present application. It should be pointed out that, for the ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.
Claims
1. A conveying assembly for conveying a piece to be conveyed, characterized in that The application relates to a delivery assembly, comprising: a sheath; a delivery member accommodated in the sheath, a distal end of the delivery member being capable of extending out of a distal end of the sheath when the sheath moves proximally, the delivery member comprising a receiving cavity with an opening at a proximal end thereof, and a first through hole and a second through hole communicating with the receiving cavity, the first through hole being located at a distal end wall of the delivery member, and the second through hole being located at a side wall of the delivery member; a limiting member, a distal end of the limiting member being capable of extending into the receiving cavity through the opening, and the limiting member being capable of reciprocating in the receiving cavity in a first direction, wherein the first direction is parallel to a length direction of the delivery member; a connecting wire comprising a first section and a second section, and a hanging section between the first section and the second section; a centering member located in the receiving cavity, an inner portion of the centering member being provided with a cavity with a cavity opening at a proximal end thereof, and the centering member being provided with a third through hole communicating with the cavity, a distal end of the centering member being capable of extending out of the first through hole and extending into the to-be-delivered member; in a first state, the first section and the second section are located in the receiving cavity, the hanging section is located outside the delivery member, the connecting wire in the receiving cavity sequentially passes through the cavity and the third through hole and then passes into the receiving cavity through the second through hole, a portion of the hanging section between the third through hole and the second through hole is used for hanging the to-be-delivered member, and the second section is sleeved on the limiting member to limit the to-be-delivered member from separating from the connecting wire; in a second state, the limiting member moves proximally to separate from the second section, so that the second section can exit to the outside of the delivery member through the second through hole, and then the hanging section is separated from the to-be-delivered member.
2. The delivery assembly of claim 1, wherein, The delivery assembly comprises a plurality of the connecting wires, and a plurality of the second through holes corresponding to the plurality of the connecting wires are arranged on the side wall of the delivery member in a spaced manner.
3. The delivery assembly of claim 1, wherein, In the first state, a distal end of the limiting member is capable of extending out of the first through hole and extending into the to-be-delivered member.
4. The delivery assembly of claim 1, wherein, A distal end of the limiting member is capable of extending into the cavity through the cavity opening; The centering member is configured to slide in the receiving cavity by being pushed by the limiting member, so that a distal end of the centering member extends out of the first through hole, or the centering member is elastic, a proximal end of the centering member is fixedly connected to a cavity wall of the receiving cavity, and a distal end of the centering member is configured to extend out of the first through hole by being pushed by the limiting member and overcoming an elastic restoring force of the centering member.
5. The delivery assembly of claim 1, wherein, The third through hole is located at a distal end wall of the centering member.
6. The delivery assembly of claim 1, wherein, A first portion of the connecting wire is bent relative to a second portion to form a loop capable of being sleeved on the limiting member; The centering member is provided with two third through holes for the first portion and the second portion to pass into the cavity respectively, so that the loop is located outside the centering member, and the centering member is configured to retreat into the receiving cavity by pulling proximal ends of the first portion and the second portion.
7. The delivery assembly of any of claims 1-5, wherein, Two portions of the connecting wire are bent relative to each other to form a loop capable of being sleeved on the limiting member; Or, one end of the connecting wire is in a crimped shape to form a loop capable of being sleeved on the limiting member; Or, the connecting wire comprises a loop part capable of being sleeved on the limiting member, and a wire part wound and fixed on the loop part.
8. A delivery system characterized by, The conveying assembly comprises the conveying assembly of any one of claims 1 to 7, and further comprises the to-be-conveyed member; In the first state, the hanging section is hung on the to-be-conveyed member; in the second state, the hanging section is separated from the to-be-conveyed member.
9. The delivery system of claim 8, wherein, The to-be-conveyed member comprises a main body and a hanging member, the hanging member comprises a hook part and a connecting part, the main body is connected to the distal end of the connecting part, the hook part is connected to the proximal end of the connecting part, a gap is formed between the hook part and the main body, the hook part is hollow inside, and the hanging section passes through the hook part through the gap to achieve hanging.
Citation Information
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