CN218075361U - Conveying device and conveying system - Google Patents

Abstract

The application provides a conveying device and a conveying system, wherein the conveying device comprises a guide head, a connecting assembly and a guide tube, the connecting assembly comprises a connecting piece and a fixing piece, the near end of the connecting piece is connected with the fixing piece, the hardness of the connecting piece is smaller than that of the fixing piece, the hardness of the fixing piece is larger than that of the guide head, and at least part of the far end of the connecting piece extends into the guide head and is connected with the guide head; the guide tube is connected with the fixing piece and/or the connecting piece. The application provides a conveyor and conveying system can improve seeker bending property under the prerequisite of guaranteeing conveyor connection stability to conveyor's seeker reduces the damage that conveying system caused the blood vessel through crooked blood vessel.

Description

Conveying device and conveying system

Technical Field

The application relates to the technical field of medical instruments, in particular to a conveying device and a conveying system.

Background

In recent years, vascular interventional surgery has been widely used clinically because of its advantages of minimal trauma, low risk, and few complications. The intervention operation of the aortic aneurysm depends on the covered stent and a delivery system thereof for treatment. The procedure for performing the surgery is generally: the covered stent is placed in a delivery system, the delivery system is firstly delivered to the aortic lesion by a passage established by a guide wire, and then the covered stent in the delivery system is released to the aortic aneurysm. The aortic aneurysm of the blood vessel is covered by the covered stent, and the covered stent isolates the blood in the blood vessel from the blood vessel at the aortic aneurysm, namely the blood enters the covered stent at the aortic aneurysm through the upstream of the aortic aneurysm, and the blood flows to the downstream part of the aortic aneurysm of the blood vessel after flowing through the covered stent.

Conventional delivery systems include a delivery device for delivering the stent graft, and a sheath disposed outside the delivery device. The conveying device comprises a guide head, a fixing piece and a guide tube, wherein the fixing piece is connected between the guide head and the guide tube, and the fixing piece is also used for bearing the contracted covered stent. To ensure that the fixing element is firmly connected to the guide head, the distal end of the fixing element generally extends into the guide head, and because the hardness of the fixing element is greater than that of the guide head, the bending performance of the proximal end of the guide head is easily reduced. Because the blood vessel is bent in a human body, the hardness of the joint of the existing seeker and the seeker and/or the fixing piece is higher, and the conveying device is not easy to pass through the bent blood vessel, particularly the aortic arch, and the forced penetration of the blood vessel can damage the blood vessel.

In view of the above-mentioned prior art's defect, the present application provides a conveying device and a conveying system that improve the bending performance of a seeker under the prerequisite of guaranteeing conveying device connection stability to the seeker of conveying device passes through crooked blood vessel, and then reduces the damage that conveying system caused the blood vessel.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the application provides a conveying device and a conveying system which improve the bending performance of a seeker on the premise of ensuring the connection stability of the conveying device, so that the seeker of the conveying device can conveniently pass through a bent blood vessel, and the damage of the conveying system to the blood vessel is reduced.

In one aspect, the present application provides a delivery device comprising:

a seeker;

the connecting assembly comprises a connecting piece and a fixing piece, the proximal end of the connecting piece is connected with the fixing piece, the hardness of the connecting piece is less than that of the fixing piece, the hardness of the fixing piece is greater than that of the seeker, and the distal end of the connecting piece at least partially extends into the seeker and is connected with the seeker; and

and the guide tube is connected with the fixing piece and/or the connecting piece.

In a possible embodiment, the connection assembly further includes a slip-off preventing ring, the slip-off preventing ring is sleeved and fixed on the connection member, and the slip-off preventing ring is fixedly connected to the inside of the seeker.

In a possible embodiment, the anti-slip ring is sleeved and fixed on the distal end of the connecting piece, the hardness of the anti-slip ring is greater than that of the guiding head, the anti-slip ring protrudes out of the side wall of the connecting piece along the radial direction, and the anti-slip ring is embedded in the guiding head.

In a possible embodiment, the guide head has a first inner cavity, a second inner cavity and a third inner cavity, the first inner cavity, the second inner cavity and the third inner cavity are sequentially communicated from the distal end of the guide head to the proximal end of the guide head, the inner diameter of the first inner cavity is smaller than the inner diameter of the second inner cavity, the anti-falling ring is accommodated in the second inner cavity, and the outer diameter of the anti-falling ring is larger than the inner diameter of the first inner cavity.

In a possible embodiment, the inner diameter of the third inner cavity is smaller than the inner diameter of the second inner cavity, the outer diameter of the anti-slip ring is larger than the inner diameter of the third inner cavity, and the connecting piece is at least partially positioned in the third inner cavity.

In a possible embodiment, the proximal end of the connector extends into and is fixedly connected to the fixing member from the distal end of the fixing member, and the distal end of the guide tube extends into and is fixedly connected to the fixing member from the proximal end of the fixing member.

In a possible embodiment, the fixing member has a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are sequentially communicated from the distal end of the fixing member to the proximal end of the fixing member, the inner diameter of the first cavity is larger than that of the second cavity, and the proximal end of the connecting member is fixedly connected in the first cavity.

In a possible embodiment, the inner diameter of the third cavity is larger than the inner diameter of the second cavity, the distal end of the guide tube sequentially penetrates through the third cavity and the second cavity and is connected with the proximal end of the connecting piece, the guide tube is connected with the inner wall of the second cavity corresponding to the outer wall of the second cavity, and the guide tube is arranged at an interval with the inner wall of the third cavity corresponding to the outer wall of the third cavity.

In a possible embodiment, the connector is a spring, a distal end of the spring is connected to the inside of the guide head, and a proximal end of the spring is fixedly connected with the guide tube and/or the fixing piece.

In a possible embodiment, the guide head is tapered, the outer diameter of the proximal end of the guide head being greater than the outer diameter of the distal end of the guide head.

In a possible embodiment, the connector is tapered with a proximal end having an outer diameter larger than the outer diameter of the distal end, or the connector is cylindrical; the connecting piece is of a spiral structure.

In a possible embodiment, the connecting member is one of a steel cable, a hypotube and a mesh structure, the connecting member has one of a cylindrical shape and a conical shape, the distal end of the connecting member is arranged in the guiding head, and the proximal end of the connecting member is connected with the fixing member.

In a possible embodiment, the outer side wall of the connector has at least one groove, which is arranged in the circumferential direction of the connector.

In a possible embodiment, the connection assembly further comprises a connection seat connected to the connector, the connection seat being fixedly connected to the guide tube.

In a possible embodiment, the connecting seat has a threaded hole, and the guide tube is provided with a threaded section, and the threaded section is in threaded connection with the threaded hole; or the connecting seat and the guide tube are welded and fixed.

In a possible embodiment, the delivery device further comprises an adhesive for adhesively connecting at least one of the guide head and the connecting member, the guide head and the anti-slip ring, the connecting member and the guide tube, the connecting member and the fixing member, and the guide tube and the fixing member.

In a possible embodiment, the length L1 of the guide head in the axial direction and the length L2 of the connecting piece in the axial direction satisfy: l1 is more than or equal to 1.5, L2 is less than or equal to 3, and the length L3 of the anti-drop ring along the axial direction and the outer diameter L4 of the anti-drop ring meet the following conditions: l3: L4=1, and the length L2 of the connecting piece along the axial direction and the outer diameter L4 of the anti-slip ring satisfy that: l2: L4= 5.

In another aspect, the present application further provides a delivery system comprising:

the conveying device;

the sheath tube assembly is sleeved outside at least part of the conveying device; and

and the adjusting assembly is connected with the conveying device to drive the conveying device to move relative to the sheath assembly.

The utility model provides a conveyor and conveying system, coupling assembling connects between the near-end of seeker and the distal end of guide tube, coupling assembling includes connecting piece and fixed subassembly, connect between the near-end of connecting piece and the distal end of guide tube through fixed subassembly, the connecting piece is connected between the near-end of seeker and the distal end of mounting, and the hardness of connecting piece is less than the hardness of mounting, avoid seeker and higher mounting or guide tube lug connection, the problem of the bending property decline of seeker near-end because the hardness of mounting or guide tube is great has been solved, can improve seeker bending property under the prerequisite of guaranteeing conveyor connection stability, so that the seeker of conveyor passes through crooked blood vessel, reduce the damage that conveying system caused the blood vessel.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below. It should be apparent that the drawings in the following description are only some of the embodiments provided by the examples of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.

FIG. 1 is a schematic view of a conveyor system provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a conveying apparatus according to an embodiment of the present disclosure;

FIG. 3 is a component view of a conveyor apparatus according to a first embodiment of the present application;

FIG. 4 is an assembly view of a delivery device provided in accordance with a first embodiment of the present application;

FIG. 5 is a part size diagram of a conveyor according to a first embodiment of the present application;

FIG. 6 is a schematic view of a connector and guide tube according to a first embodiment of the present application;

FIG. 7 is a schematic view of a connection member, a detachment prevention ring and a guide tube according to a first embodiment of the present disclosure;

FIG. 8 is a schematic view of a connection member, a fixing member, a detachment prevention ring and a guide tube according to a first embodiment of the present application;

FIG. 9 is a detail view of a delivery device according to a second embodiment of the present application;

FIG. 10 is an assembly view of a delivery device provided in accordance with a second embodiment of the present application;

fig. 11 is a schematic connection diagram of a first connecting member and a connecting seat according to a second embodiment of the present application;

FIG. 12 is a schematic view of a first connector, a connecting seat and a guide tube according to a second embodiment of the present application;

FIG. 13 is a schematic view of a first connector, a fastener, a connecting seat and a guide tube according to a second embodiment of the present application;

FIG. 14 is a schematic view of a second connector, a connecting seat and a guide tube according to the second embodiment of the present application;

FIG. 15 is a schematic illustration of components of a delivery device according to a third embodiment of the present application;

FIG. 16 is a schematic illustration of a component of a delivery device according to a fourth embodiment of the present application;

FIG. 17 is a schematic view of a first connector according to a fifth embodiment of the present application;

fig. 18 is a schematic structural diagram of a second connecting member according to a fifth embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the present application without making any creative efforts shall fall within the protection scope of the present application.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present application. It is apparent, however, to one skilled in the art that the present application may be practiced without these specific details or with an equivalent arrangement.

It should be noted that, for the transport device, an end of the transport device which is relatively close to the operator is generally referred to as a "proximal end", and an end of the transport device which is relatively far from the operator is generally referred to as a "distal end", and "proximal end" and "distal end" of any component of the transport device and the transport system are defined according to this principle.

"axial" generally refers to the length of the guide head as it is being transported, and "radial" generally refers to the direction of the guide head perpendicular to its "axial" direction, and defines both "axial" and "radial" directions of any component of the transport device and transport system in accordance with this principle.

Referring to fig. 1, the present application provides a detailed description of a delivery device 10 and a delivery system 100 for aortic aneurysm vascular intervention. An aortic aneurysm interventional procedure relies on the stent graft and delivery system 100 for treatment. The procedure for performing the surgery is generally: the covered stent is placed in the delivery system 100, the delivery device 10 is firstly delivered to the aortic lesion through a passage established by the guide wire, and then the covered stent bundled in the delivery system 100 is released to the aortic aneurysm. The aortic aneurysm of the blood vessel is covered by the covered stent, and the covered stent isolates the blood in the blood vessel from the blood vessel at the aortic aneurysm, namely the blood enters the covered stent at the aortic aneurysm through the upstream of the aortic aneurysm, and the blood flows to the downstream part of the aortic aneurysm of the blood vessel after flowing through the covered stent.

The conveying system 100 includes a conveying device 10, a sheath assembly 20 and an adjusting assembly 30, the sheath assembly 20 is connected between a proximal end of the conveying device 10 and a distal end of the adjusting assembly 30, the distal end of the sheath assembly 20 is sleeved on the proximal end of the conveying device 10, the conveying device 10 can extend out of the sheath assembly 20, the sheath assembly 20 is driven by the adjusting assembly 30 to move, and then the conveying device 10 is driven to move, so that the distal end of the conveying device 10 is a structure which is firstly contacted with a target tissue in the conveying system 100.

The sheath assembly 20 includes a conveying sheath 201 and a driving sheath 202 penetrating the conveying sheath 201, the proximal end of the conveying device 10 is accommodated in the distal end of the conveying sheath 201, the proximal end of the conveying sheath 201 is connected to the driving sheath 202, and the driving sheath 202 moves to drive the conveying device 10 to move toward a direction close to or away from the target tissue.

The adjusting assembly 30 includes a push rod 301 movably disposed and a handle 302 for adjusting the push rod 301 to move, the push rod 301 is connected to the driving sheath 202 disposed in the delivery sheath 201, the handle 302 drives the push rod 301 to move to drive the driving sheath 202 to move, and then the delivery device 10 is driven to move toward a direction close to or away from the target tissue.

Referring to fig. 1 to 4, the delivery device 10 includes a guidance head 1, a connection assembly 2, and a guidance tube 3, a distal end of the guidance head 1 is configured to contact a target tissue first, the connection assembly 2 is connected between a proximal end of the guidance head 1 and a distal end of the guidance tube 3, the guidance tube 3 is configured to be connected to a driving sheath 202 of the sheath assembly 20, the driving sheath 202 moves to drive the guidance tube 3 to move, and further drives the connection member 21 and the guidance head 1 connected to the distal end of the connection member 21 to move, so that the guidance head 1 moves along a blood vessel in a direction approaching or departing from the target tissue.

The connecting assembly 2 comprises a connecting piece 21, a fixing piece 22 and a slip-off preventing ring 23. The proximal end of the connecting piece 21 is connected with the distal end of the fixing piece 22, and the proximal end of the fixing piece 22 is connected with the guide tube 3, so that the proximal end of the connecting component 2 is fixedly connected with the distal end of the guide tube 3. The distal end of the connecting piece 21 is connected with the guide head 1, and the distal end of the connecting piece 21 at least partially extends into the proximal end of the guide head 1, so that the distal end of the connecting component 2 is fixedly connected with the proximal end of the guide head 1. The anti-slip ring 23 is sleeved and fixed on the connecting piece 21, the anti-slip ring 23 is fixedly connected inside the seeker 1, and the hardness of the anti-slip ring 23 is greater than that of the seeker 1, so that the firmness of connection between the connecting piece 21 and the seeker 1 is further ensured. The hardness of the connecting piece 21 is less than that of the fixing piece 22, and the hardness of the fixing piece 22 is greater than that of the seeker 1. On one hand, the hardness of the fixing piece 22 is higher, so that the connection between the proximal end of the connecting piece 21 and the distal end of the fixing piece 22 is firmer and more reliable, and the risk of falling off caused by the connection between the connecting piece 21 and the fixing piece 22 is reduced; on the other hand, the whole hardness of the joint of the seeker 1 and the connecting piece 21 is small, so that the conveying device 10 can pass through a bent blood vessel, and the risk of injury to the blood vessel when the conveying device 10 penetrates through the blood vessel is reduced. Preferably, the connector 21 is a steel cable and the connector 21 is cylindrical in shape. It is understood that in other embodiments, the structure of the connector 21 includes, but is not limited to, one of other mesh structures such as hypotubes, springs, etc.; the shape of the connecting member 21 includes, but is not limited to, one of a cylinder (cylinder, triangular prism, quadrangular prism), a cone (cone, circular truncated cone, triangular prism, quadrangular prism), and the like, which is not limited in this application.

In a specific embodiment, the hardness of the guide head 1 is less than that of the connecting piece 21, so that the connection between the proximal end of the guide head 1 and the distal end of the connecting piece 21 is firmer, and the hardness of the guide head 1 is lower, which is beneficial to reducing the damage of the guide head 1 to the inner wall of the blood vessel when the delivery device 10 is arranged in the blood vessel; the hardness of the connecting piece 21 is less than that of the guide tube 3, so that the connection between the proximal end of the connecting piece 21 and the distal end of the guide tube 3 is firmer, and the hardness of the guide tube 3 is higher, which is beneficial to the pushing performance of the guide tube 3 and the driving force for conducting and driving the sheath 202, and further improves the matching precision among the conveying device 10, the sheath assembly 20 and the adjusting assembly 30; the hardness of the connecting piece 21 is between that of the guide head 1 and that of the guide tube 3, so that the whole conveying device 10 is connected lightly, and the flexibility of the guide head 1 is high.

In one specific embodiment, the guide head 1 has a first lumen 11, a second lumen 12 and a third lumen 13, and the first lumen 11, the second lumen 12 and the third lumen 13 are sequentially communicated from the distal end to the proximal end in the axial direction of the guide head 1. The inner diameter of the first inner cavity 11 is smaller than that of the second inner cavity 12, the inner diameter of the third inner cavity 13 is smaller than that of the second inner cavity 12, the anti-falling ring 23 is contained in the second inner cavity 12, the outer diameter of the anti-falling ring 23 is larger than that of the first inner cavity 11, and the outer diameter of the anti-falling ring 23 is larger than that of the third inner cavity 13, so that the anti-falling ring 23 is fixedly contained in the second inner cavity 12. The distal end of the connecting piece 21 extends into the anti-drop ring 23 from the third inner cavity 13, and the distal end of the connecting piece 21 is fixedly connected with the anti-drop ring 23, so that the connecting piece 21, the anti-drop ring 23 and the seeker 1 are better in fixed connection firmness, and the risk of dropping caused by connection among the connecting piece 21, the anti-drop ring 23 and the seeker 1 is reduced.

In one specific embodiment, the fixing member 22 has a first cavity 221, a second cavity 222 and a third cavity 223, and the first cavity 221, the second cavity 222 and the third cavity 223 are sequentially communicated from the distal end to the proximal end along the axial direction of the fixing member 22. The inner diameter of the first cavity 221 is larger than that of the second cavity 222, and the proximal end of the connecting member 21 is received and fixed in the first cavity 221. Since the hardness of the fixing member 22 is greater than that of the connecting member 21, the proximal end of the connecting member 21 is received and fixed in the first cavity 221, so that the connection between the connecting member 21 and the fixing member 22 is more secure. The inner diameter of the third cavity 223 is larger than that of the second cavity 222, the distal end of the guide tube 3 sequentially penetrates through the third cavity 223 and the second cavity 222 and is connected with the proximal end of the connecting piece 21, and the distal end of the guide tube 3 extends into the proximal end of the connecting piece 21 and is fixedly connected with the proximal end of the connecting piece 21, so that the connection between the guide tube 3 and the connecting piece 21 is firmer, and the risk of falling off caused by the connection between the guide tube 3 and the connecting piece 21 is reduced. The outer wall of the guide tube 3 corresponding to the second cavity 222 is connected with the inner wall of the second cavity 222, so as to further enhance the connection firmness of the guide tube 3 and the connecting component 2. The outer wall of the guide tube 3 corresponding to the third cavity 223 and the inner wall of the third cavity 223 are arranged at intervals to form a gap, the gap is used for accommodating and fixing the distal end of the covered stent needed in the aortic aneurysm vascular intervention operation, when the covered stent is delivered into a blood vessel, the distal end of the covered stent is compressed in the gap along the radial direction, the distal end of the covered stent is prevented from expanding along the radial direction through the cavity wall of the third cavity 223, when the distal end of the covered stent needs to be released, the distal end of the covered stent is pulled out from the gap, and the covered stent can be elastically expanded under the elasticity of the covered stent.

Referring to fig. 1 and 5, fig. 5 is a part size diagram of a conveying device according to a first embodiment of the present application.

In a specific embodiment, the length L1 of the guide head 1 in the axial direction and the length L2 of the connecting piece 21 in the axial direction satisfy: l1 is more than or equal to 1.5, L2 is less than or equal to 3, and the length L3 of the anti-falling ring 23 along the axial direction and the outer diameter L4 of the anti-falling ring 23 meet the following conditions: l3: L4=1, and the length L2 of the connecting member 21 in the axial direction and the outer diameter L4 of the anti-slip ring 23 satisfy: l2: L4=5, the outer diameter L5 of the delivery sheath 201 and the outer diameter L4 of the anti-drop ring 23 satisfy: l4=0.5L, so as to ensure that the whole anti-falling effect of the conveying device 10 is good, and the guide head 1 of the conveying device 10 has high flexibility. Wherein, the flexibility is inversely proportional to the hardness, i.e. the flexibility is lower when the hardness is larger, and the flexibility is higher when the hardness is smaller. Preferably, taking the specifications of the outer diameter L5 of the delivery sheath 201 of the delivery system 100 as 16F and 18F as an example, the optimal specifications of the axial length L1 of the guide head 1, the axial length L2 of the connecting piece 21, the axial length L3 of the anti-slip ring 23 and the outer diameter L4 of the anti-slip ring 23 are respectively:

L5(mm)	L1(mm)	L2(mm)	L3(mm)	L4(mm)
					5.33(16F)	40	1.34	13.4	2.67
6(18F)	40	1.5	15	3

referring to fig. 3 to 8, the connection of the delivery device 10 according to the first embodiment of the present application will be described in detail.

In the first step, the distal end of the guiding tube 3 is inserted into the proximal end of the connecting member 21, and the distal end of the guiding tube 3 is fixedly connected to the proximal end of the connecting member 21 by welding or the like. Preferably, the distal end of the guide tube 3 is fixedly connected with the proximal end of the connecting piece 21 by laser welding, and the welding position is located between the outer wall of the distal end of the guide tube 3 extending into the connecting piece 21 and the inner wall of the proximal end of the connecting piece 21. Of course, the distal end of the guide tube 3 and the proximal end of the connector 21 may be fixedly connected in other ways, such as: the distal end of the guide tube 3 and the proximal end of the connecting member 21 are first bonded by an adhesive (not shown) and then fixed by welding, which is not limited in the present application.

In the second step, the distal end of the connecting member 21 is inserted into the anti-slip ring 23, and the anti-slip ring 23 is fixedly sleeved on the outer wall of the distal end of the connecting member 21 by welding or the like. Preferably, the distal end of the connecting member 21 is fixedly connected to the slip-off preventing ring 23 by laser welding at a position where the distal end of the connecting member 21 extends between the outer wall of the connecting member 21 and the inner wall of the slip-off preventing ring 23. Of course, the distal end of the connecting member 21 and the anti-slip ring 23 may be fixedly connected by other means, such as: the distal end of the connecting member 21 is connected to the anti-drop ring 23 by adhesive, and then fixed by welding, which is not limited in the present application.

Thirdly, the fixing member 22 is sleeved at the joint of the connecting member 21 and the guide tube 3, and the fixing member 22 is fixedly sleeved at the periphery of the joint of the connecting member 21 and the guide tube 3 by welding or the like, so as to realize the fixed connection between the connecting member 2 and the guide tube 3. Preferably, the connection between the fixing member 22 and the connecting member 21 and the guide tube 3 is fixed by laser welding, the welding position between the fixing member 22 and the connecting member 21 is located between the inner wall of the first cavity 221 of the fixing member 22 and the outer wall of the proximal end of the connecting member 21, and the welding position between the fixing member 22 and the guide tube 3 is located between the inner wall of the second cavity 222 of the fixing member 22 and the outer wall of the corresponding second cavity 222 of the guide tube 3. Of course, the fixing member 22 and the connecting member 21 may be fixedly connected to the guide tube 3 in other manners, such as: the fixing element 22 and the connecting element 21 are respectively bonded to the guide tube 3 by an adhesive, and then fixed by welding, which is not limited in this application.

Fourthly, the guiding head 1 is fixed at the far end of the connecting piece 21 through injection molding and the like, and the guiding head 1 covers the anti-drop ring 23, so that the guiding head 1, the connecting component 2 and the guiding tube 3 are integrally fixedly connected, and the conveying device 10 is assembled. Certainly, the proximal end of the seeker 1 and the distal end of the fixing piece 22 may abut against each other, and the proximal end of the seeker 1 and the distal end of the fixing piece 22 may also be disposed at an interval, which is not limited in this application; the seeker 1, the distal end of the connector 21 and the anti-slip ring 23 can be fixedly connected in other ways, such as: the outer walls of the connecting piece 21 and the anti-drop ring 23 are coated with an adhesive, and the seeker 1 is fixed on the outer walls of the connecting piece 21 and the anti-drop ring 23 through injection molding, which is not limited in the present application.

Because the hardness of the connecting piece 21 is lower than that of the fixing piece 22 and the guiding head 1 can be bent, and is not embedded, extended or coated at the far end of the fixing piece 22, the near end of the guiding head 1 close to the fixing piece 22 or the guiding tube 3 has good bending performance, and the conveying device 10 can pass through the bent blood vessel, and the risk of injury to the blood vessel when the conveying device 10 passes through the blood vessel is reduced.

Referring to fig. 4, 9 and 10, a conveyor 10 according to a second embodiment of the present invention is substantially the same as the conveyor 10 according to the first embodiment of the present invention, except that the anti-drop ring 23 is omitted from the connecting element 2 according to the second embodiment of the present invention, but the connecting element 2 according to the second embodiment of the present invention further includes a connecting seat 24, and the connecting element 21 according to the second embodiment of the present invention is a spring.

In one embodiment, the proximal end of the connecting member 21 is disposed inside the distal end of the connecting seat 24, and the proximal end of the connecting member 21 is fixedly connected to the distal end of the connecting seat 24. The far end of the connecting piece 21 is arranged inside the near end of the seeker 1, and the far end of the connecting piece 21 is fixedly connected with the seeker 1. The connecting seat 24 is integrally received in the first cavity 221 of the fixing member 22, and the connecting seat 24 is fixed in the first cavity 221 of the fixing member 22. The distal end of the guiding tube 3 sequentially penetrates through the third cavity 223 and the second cavity 222 from the proximal end of the fixing member 22 and extends into the proximal end of the connecting seat 24, and the distal end of the guiding tube 3 is fixedly connected with the proximal end of the connecting seat 24.

Preferably, the conducting tip 1 is tapered, and the outer diameter of the proximal end of the conducting tip 1 is larger than the outer diameter of the distal end of the conducting tip 1, so that the wall thickness transition of the conducting tip 1 is more uniform. The connecting member 21 is tapered, the outer diameter of the proximal end of the connecting member 21 is larger than the outer diameter of the distal end of the connecting member 21, and the connecting member 21 has a spiral rising structure from the proximal end to the distal end. By providing the connector 21 with a taper matching the profile of the guide head 1, the connector 21 can be arranged longer in the guide head 1, which is beneficial to improve the flexibility of the guide head 1 and facilitates the guide head 1 and the delivery device 10 to pass through a curved blood vessel. It will be appreciated that the shapes of seeker 1 and connector 21 may also be other, for example: and (3) a cylindrical shape, which is not limited by the present application.

In another embodiment, coupling assembly 2 may omit coupling seat 24, and the proximal end of coupling member 21 is directly fixedly coupled to retaining member 22 and/or guide tube 3.

Referring to fig. 9 to fig. 13, the connection of the conveying device 10 according to the second embodiment of the present application will be described in detail.

First, the proximal end of the connecting member 21 is connected to the distal end of the connecting seat 24, and the proximal end of the connecting member 21 is fixedly connected to the distal end of the connecting seat 24 by welding or the like. Preferably, the proximal end of the connecting member 21 is fixedly connected with the distal end of the connecting seat 24 by laser welding. Of course, the connecting member 21 and the connecting seat 24 may be integrally formed or fixedly connected in other manners, which is not limited in this application.

Secondly, the distal end of the guiding tube 3 is inserted into the connecting seat 24, and the connecting seat 24 is fixedly sleeved on the outer wall of the distal end of the guiding tube 3 by welding and other methods. Preferably, the distal end of the guide tube 3 is fixedly connected with the connecting seat 24 by a laser welding method, and the welding position is located between the outer wall of the distal end of the guide tube 3 and the inner wall of the connecting seat 24. Of course, the distal end of the guiding tube 3 and the connecting seat 24 may be fixedly connected in other manners, which is not limited in this application.

Thirdly, the fixing member 22 is sleeved at the joint of the guide tube 3 and the connecting seat 24, and the fixing member 22 is fixedly sleeved at the periphery of the joint of the guide tube 3 and the connecting seat 24 by welding or the like, so as to realize the fixed connection between the connecting assembly 2 and the guide tube 3. Preferably, the joint between the fixing member 22 and the guide tube 3 and the connecting seat 24 is fixed by laser welding, the welding position of the fixing member 22 and the connecting seat 24 is located between the inner wall of the first cavity 221 of the fixing member 22 and the outer wall of the proximal end of the connecting member 21, the welding position of the fixing member 22 and the guide tube 3 is located between the inner wall of the second cavity 222 of the fixing member 22 and the end face of the proximal end of the connecting member 21, and the welding position of the fixing member 22 and the guide tube 3 is located between the inner wall of the second cavity 222 of the fixing member 22 and the outer wall of the corresponding second cavity 222 of the guide tube 3. Of course, the fixing member 22 and the guide tube 3 may be fixedly connected to the connecting seat 24 in other manners, which is not limited in this application.

Fourthly, the guiding head 1 is fixed at the far end of the connecting piece 21 through injection molding and the like, and the guiding head 1 covers the connecting piece 21, so that the guiding head 1, the connecting component 2 and the guiding tube 3 are integrally fixedly connected, and the conveying device 10 is assembled. Certainly, the proximal end of the seeker 1 and the distal end of the fixing piece 22 may abut against each other, and the proximal end of the seeker 1 and the distal end of the fixing piece 22 may also be disposed at an interval, which is not limited in this application; the distal ends of the seeker 1 and the connector 21 may be fixedly connected in other ways, which is not limited in this application.

Because the hardness of the connecting piece 21 (spring) is less than that of the fixing piece 22 and the guiding head 1 is not fixedly connected with the far end of the fixing piece 22, the guiding head 1 has good bending performance close to the fixing piece 22 or the near end of the guiding tube 3, the input and delivery device can pass through the bent blood vessel, and the risk of injury to the blood vessel when the delivery device 10 is arranged in the blood vessel in a penetrating mode is reduced.

Referring to fig. 10 and 14, in a specific embodiment, the connecting seat 24 has a threaded hole 241, the distal end of the guiding tube 3 is provided with a threaded section 31, and the threaded section 31 arranged at the distal end of the guiding tube 3 is in threaded connection with the threaded hole 241 of the connecting seat 24, so as to improve the connection firmness of the guiding tube 3 with the connecting seat 24 and the connecting assembly 2 and reduce the risk of falling off due to the connection between the connecting member 21 and the fixing member 22. Of course, the connecting seat 24 and the guide tube 3 may be fixed by first screwing and then further fixed by welding. Alternatively, the connection seat 24 and the guide tube 3 may be fixed by bonding with an adhesive, and then further fixed by welding. Alternatively, the connection seat 24 and the guide tube 3 may be fixed by first being bonded by an adhesive and then further fixed by being screwed. Through carrying out dual fixed connection to connecting seat 24 and guide tube 3 to make the fastness of connection between connecting seat 24 and the guide tube 3 better.

Referring to fig. 10 and 15, a conveying device 10 according to a third embodiment of the present disclosure is substantially the same as the conveying device 10 according to the second embodiment of the present disclosure, except that the connecting element 2 according to the third embodiment of the present disclosure omits a connecting seat 24, and the connecting element 21 according to the second embodiment of the present disclosure is a mesh structure. On one hand, the flexibility of the net-shaped structure is better, so that the bending performance of the joint of the near end of the guide head 1 and the connecting piece 21 is improved, and the guide head 1 and the conveying device 10 can conveniently penetrate through a bent blood vessel; on the other hand, when seeker 1 is connected with connecting piece 21 of network structure by injection molding, seeker 1 material can enter the mesh of connecting piece 21, and then improve the fastness of connection of seeker 1 and connecting piece 21. Alternatively, the connecting member 21 may be a woven mesh or a laser-cut mesh structure, which is not limited in this application.

In a specific embodiment, the proximal end of the connector 21 is fixedly connected to the distal end of the guide tube 3, the distal end of the connector 21 is disposed inside the proximal end of the guide head 1, and the distal end of the connector 21 is fixedly connected to the guide head 1. The distal end of the guide tube 3 passes through the third cavity 223 and the second cavity 222 from the proximal end of the fixing member 22 in sequence and extends into the proximal end of the connecting member 21, and the distal end of the guide tube 3 is fixedly connected with the proximal end of the connecting member 21.

Referring to fig. 10 and 16, a conveying apparatus 10 according to the fourth embodiment of the present application is substantially the same as the conveying apparatus 10 according to the second embodiment of the present application, except that the connection provided in the fourth embodiment of the present application is a hypotube.

In one embodiment, the proximal end of the connecting member 21 is fixedly connected to the connecting seat 24, and the fixing seat is received and fixed in the first cavity 221 of the fixing member 22. The far end of the connecting piece 21 is arranged inside the near end of the seeker 1, and the far end of the connecting piece 21 is fixedly connected with the seeker 1. The distal end of the guiding tube 3 sequentially penetrates through the third cavity 223 and the second cavity 222 from the proximal end of the fixing member 22 and extends into the proximal end of the connecting seat 24, and the distal end of the guiding tube 3 is fixedly connected with the connecting seat 24.

Referring to fig. 10, 17 and 18, a connecting element 21 according to a fifth embodiment of the present invention is substantially the same as the connecting element 21 according to the second embodiment of the present invention, except that the connecting element 21 according to the fifth embodiment of the present invention has a tubular shape, and an outer wall of the connecting element 21 according to the fifth embodiment of the present invention has at least one groove 211.

In a specific embodiment, the connecting member 21 has a cylindrical tubular shape, and the outer wall of the connecting member 21 has a plurality of grooves 211 arranged at intervals along the circumference of the connecting member 21. Through the arrangement of the groove 211, the flexibility of the position corresponding to the groove 211 on the connecting piece 21 is better, and further the bending performance of the joint of the connecting piece 21 and the guide head 1 is better, so that the guide head 1 and the conveying device 10 can conveniently penetrate through a bent blood vessel. Preferably, the material of the connecting piece 21 is stainless steel, and a plurality of grooves 211 are formed on the outer wall of the stainless steel connecting piece 21, so that the stainless steel connecting piece 21 has certain bending flexibility. Preferably, the connecting element 21 may be conical, so that the connecting element 21 may be arranged longer in the guide head 1, which is beneficial to improve the flexibility of the guide head 1 and facilitate the guide head 1 and the delivery device 10 to pass through a curved blood vessel.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (18)

1. A conveyor apparatus, characterized in that the conveyor apparatus comprises:

a seeker;

the connecting assembly comprises a connecting piece and a fixing piece, the proximal end of the connecting piece is connected with the fixing piece, the hardness of the connecting piece is less than that of the fixing piece, the hardness of the fixing piece is greater than that of the seeker, and the distal end of the connecting piece at least partially extends into the seeker and is connected with the seeker; and

and the guide tube is connected with the fixing piece and/or the connecting piece.

2. The delivery device of claim 1,

the connecting assembly further comprises an anti-dropping ring, the anti-dropping ring is sleeved and fixed on the connecting piece, and the anti-dropping ring is fixedly connected inside the seeker.

3. The delivery device of claim 2,

the anti-drop ring is sleeved and fixed at the far end of the connecting piece, the hardness of the anti-drop ring is greater than that of the seeker, the anti-drop ring protrudes out of the side wall of the connecting piece along the radial direction, and the anti-drop ring is embedded into the seeker.

4. The delivery device of claim 2,

the seeker is provided with a first inner cavity, a second inner cavity and a third inner cavity, the first inner cavity, the second inner cavity and the third inner cavity are sequentially communicated from the far end of the seeker to the near end of the seeker, the inner diameter of the first inner cavity is smaller than that of the second inner cavity, the anti-falling ring is contained in the second inner cavity, and the outer diameter of the anti-falling ring is larger than that of the first inner cavity.

5. The delivery device of claim 4,

the inner diameter of the third inner cavity is smaller than that of the second inner cavity, the outer diameter of the anti-falling ring is larger than that of the third inner cavity, and the connecting piece is at least partially positioned in the third inner cavity.

6. The delivery device of claim 1,

the proximal end of the connecting piece extends into the fixing piece from the distal end of the fixing piece and is fixedly connected into the fixing piece, and the distal end of the guide tube extends into the fixing piece from the proximal end of the fixing piece and is fixedly connected into the fixing piece.

7. The delivery device of claim 6,

the fixing piece is provided with a first cavity, a second cavity and a third cavity, the first cavity, the second cavity and the third cavity are sequentially communicated with the near end of the fixing piece from the far end of the fixing piece, the inner diameter of the first cavity is larger than that of the second cavity, and the near end of the connecting piece is fixedly connected into the first cavity.

8. The delivery device of claim 7,

the inner diameter of the third cavity is larger than that of the second cavity, the far end of the guide tube sequentially penetrates through the third cavity and the second cavity and is connected with the near end of the connecting piece, the guide tube corresponds to the outer wall of the second cavity and is connected with the inner wall of the second cavity, and the guide tube corresponds to the outer wall of the third cavity and is arranged at intervals with the inner wall of the third cavity.

9. The delivery device of claim 1,

the connecting piece is a spring, the far end of the spring is connected to the inside of the seeker, and the near end of the spring is fixedly connected with the seeker and/or the fixing piece.

10. The delivery device of claim 9,

the seeker is conical, and the outer diameter of the proximal end of the seeker is larger than that of the distal end of the seeker.

11. The delivery device of claim 1,

the connecting piece is conical with the outer diameter of the proximal end larger than that of the distal end, or the connecting piece is cylindrical;

the connecting piece is of a spiral structure.

12. The delivery device of claim 1,

the connector is one of a steel cable, a hypotube or a net structure, the connector is cylindrical or conical in shape, the far end of the connector penetrates through the inside of the seeker, and the near end of the connector is connected with the fixing piece.

13. The delivery device of claim 1,

the outer side wall of the connecting piece is provided with at least one groove, and the groove is arranged along the circumferential direction of the connecting piece.

14. The conveying apparatus as claimed in any one of claims 9 to 13,

the connecting assembly further comprises a connecting seat connected with the connecting piece, and the connecting seat is fixedly connected with the guide tube.

15. The delivery device of claim 14,

the connecting seat is provided with a threaded hole, the guide tube is provided with a threaded section, and the threaded section is in threaded connection with the threaded hole; alternatively, the first and second liquid crystal display panels may be,

the connecting seat is welded and fixed with the guide tube.

16. The delivery device of claim 2,

the conveying device further comprises an adhesive, and the adhesive is used for bonding and connecting at least one of the guide head and the connecting piece, the guide head and the anti-falling ring, the connecting piece and the guide tube, the connecting piece and the fixing piece, and the guide tube and the fixing piece.

17. The delivery device of claim 2,

the length L1 of the seeker along the axial direction and the length L2 of the connecting piece along the axial direction meet the following conditions: l1 is more than or equal to 1.5, L2 is more than or equal to 3, and the length L3 of the anti-drop ring along the axial direction and the outer diameter L4 of the anti-drop ring meet the following conditions: l4: L4=1, and the length L2 of the connecting piece along the axial direction and the outer diameter L4 of the anti-slip ring satisfy that: l2: L4= 5.

18. A conveying system, characterized in that the conveying system comprises:

the delivery device of any one of claims 1-17;

the sheath tube assembly is sleeved outside at least part of the conveying device; and

and the adjusting assembly is connected with the conveying device to drive the conveying device to move relative to the sheath assembly.

Images