CN110693635B

CN110693635B - Lumen stent conveyor

Info

Publication number: CN110693635B
Application number: CN201810743889.0A
Authority: CN
Inventors: 张军强
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2022-05-27
Anticipated expiration: 2038-07-09
Also published as: WO2020011132A1; CN110693635A

Abstract

The invention relates to a pipe cavity support conveyor which comprises a conveyor head, a sheath-core pipe and a connecting piece, wherein at least part of the connecting piece is accommodated in the conveyor head, the connecting piece comprises a first connecting part and a second connecting part connected with the near end of the first connecting part, the first connecting part is fixedly connected with the sheath-core pipe, the second connecting part is fixedly connected with the conveyor head, and the axial length of the second connecting part is greater than the outer diameter of the sheath-core pipe, so that the sheath-core pipe is connected with the conveyor head safely and reliably, and the normal operation of clinical operation is ensured.

Description

Lumen stent conveyor

Technical Field

The invention relates to the field of medical instruments, in particular to a pipe cavity support conveyor.

Background

The aorta of the human body is divided into ascending aorta, aortic arch, descending aorta of the chest and abdominal aorta. Due to various pathological changes, such as inflammation and ulcer, the intima or the vessel wall of the aorta is damaged, and under the combined action of the impact force of blood flow, aneurysm diseases are easy to occur. Once the aneurysm ruptures, a large amount of blood will flow out of the blood vessel, and the patient has insufficient blood volume for blood circulation, resulting in shock or death of the human body.

The common treatment methods for the aneurysm diseases are divided into surgical treatment and drug treatment. At present, the treatment mode is mainly surgical treatment, the traditional surgical treatment is open surgery, after the external blood circulation of the body is built, the blood vessel with aneurysm lesion is cut off, and then the artificial blood vessel is connected with the blood vessel, so that the normal circulation of the arterial blood is realized. Because the mode of adopting traditional operation to treat aneurysm disease is surgical risk height, to the people trauma great, the postoperative needs longer time to recover, to old, the weak crowd, will cause very big body trauma.

In recent years, the treatment of cardiovascular diseases by interventional therapy has become a new treatment. With the continuous development of interventional technology, the advantages of using a covered stent for treating aortic aneurysm and arterial dissection diseases are prominent day by day, the covered stent is an artificial blood vessel which is adaptive to the size of the blood vessel and mainly comprises a covering membrane and a stent for supporting the covering membrane, the covering membrane is generally made of terylene or e-PTFE membrane, and the supporting stent is mainly woven by stainless steel wires or nickel-titanium alloy wires. The use process of the covered stent is that the stent is firstly compressed into a sheath tube of a stent conveyor, a blood vessel is generally punctured at the position of a femoral artery or an iliac artery, a guide wire is utilized to establish a track, the conveyor establishes a conveying path through the iliac artery, an abdominal aorta, a thoracic aorta, an aortic arch and an ascending aorta, the conveying path is further conveyed to a specified position of a lesion, then the stent is released, the stent is unfolded and tightly attached to the wall of an aneurysm, the blood flow and the lesion part are isolated by a covering film of the stent, the impact of the blood flow on the aneurysm wall of the lesion part is eliminated, a channel for normal blood circulation is established, and then the guide wire and the conveyor are withdrawn, so that the interventional therapy of the aneurysm and the arterial interlayer is realized.

The interventional therapy method adopting the covered stent has low cost, short treatment period and small wound to human body, and gradually becomes the mainstream for treating the aortic aneurysm disease. However, the requirements of the stent graft intervention method on the stent are mainly reflected in the following aspects: (1) whether each index of the covered stent meets the requirement or not; (2) whether the conveyor can normally load, convey and safely release the covered stent; (3) whether the clinician can operate the conveyor normally and smoothly or not is ensured, and the normal operation is ensured; (4) the conveyor can not be smoothly withdrawn from the body after the support is released. It can be seen that the delivery device of the stent graft plays an important role in the interventional treatment of the stent graft.

The tectorial membrane support conveyer mainly comprises a conveyer head, a sheath core pipe, a push rod, a sheath pipe and a handle assembly, wherein the conveyer head and the sheath core pipe are fixedly connected. At present, a fixed connection mode between a conveyor head and a sheath core pipe is mainly a welding fixed mode, a welding position is mainly at a contact position of the tail end of the conveyor head and the sheath core pipe, the surface of the sheath core pipe is subjected to structural change due to high-temperature heating due to welding, and then a welding area can generate stress concentration under the condition of bending.

Disclosure of Invention

Therefore, a tube cavity support conveyor with a reliable fixed connection mode of a sheath core tube and a conveyor head is needed to be provided, so that the sheath core tube and the conveyor head are ensured to be connected safely and reliably, and further, the normal operation of clinical operation is ensured.

The utility model provides a lumen support conveyer, includes conveyer head, sheath core pipe and connecting piece, the connecting piece at least part hold in conveyer head, the connecting piece include first connecting portion and with the second connecting portion that the near-end of first connecting portion links to each other, first connecting portion with sheath core pipe fixed connection, the second connecting portion with conveyer head fixed connection, just the axial length of second connecting portion is greater than the external diameter of sheath core pipe.

Furthermore, the first connecting portion is sleeved on the sheath core pipe, and the inner surface of the first connecting portion is fixedly connected with the outer surface of the sheath core pipe.

Furthermore, the second connecting part is sleeved on the sheath core pipe, and the outer surface of the second connecting part is fixedly connected with the inner surface of the head of the conveyor.

Further, an outer surface of the second connecting portion is formed with an anchoring structure.

Further, the anchoring structure is selected from at least one of a threaded structure, a grooved structure, and an open-slot structure.

Further, the outer surface of the second connecting portion is a rough surface.

Further, the second connecting portion is connected to the conveyor head by glue or by injection molding.

Further, the first connection portion is located inside the conveyor head and the second connection portion is located at least partially inside the conveyor head.

Further, when the second connecting portion is located at the conveyor head, a proximal end of the second connecting portion protrudes out of the conveyor head, and the proximal end of the second connecting portion has a smooth surface.

Further, the connecting piece still includes butt portion, butt portion with the distal end of first connecting portion is connected, the distal end of sheath core pipe with butt portion.

Above-mentioned lumen support conveyer is through setting up the connecting piece between conveyer head and sheath core pipe, set up first connecting portion and second connecting portion at the connecting piece, first connecting portion and sheath core pipe fixed connection, second connecting portion and conveyer head fixed connection, and the axial length of second connecting portion is greater than the external diameter of sheath core pipe, when making lumen support conveyer get into the blood vessel environment of complicacy tortuous, the position of stress concentration can be in the lumen inside of connecting piece, and the stress concentration point position can be kept away from to crooked atress position, can bear great bending force, and then can not produce the fracture, and then avoid the conveyer head to drop in human blood vessel.

Drawings

FIG. 1 is a schematic structural view of a lumen stent transporter provided in a first embodiment;

FIG. 2 is a cross-sectional view of the connector provided with the delivery head and sheath core tube in accordance with the first embodiment;

FIG. 3 is a cross-sectional view of the connecting member and the sheath-core tube of FIG. 2;

FIG. 4 is a schematic view of the connection of FIG. 3 in which the anchoring structure of the second connection portion is a groove;

FIG. 5 is a schematic diagram of a second embodiment of a connector with an open slot anchoring structure for a second connecting portion;

FIG. 6 is a cross-sectional view of a connection having a sanded outer surface of a second connection provided in accordance with a third embodiment;

FIG. 7 is a cross-sectional view of a connection in which the anchoring structure of the second connection portion is threaded, according to a fourth embodiment;

fig. 8 is a sectional view of the connecting member and the sheath-core tube according to the fifth embodiment;

fig. 9 is a schematic view of a fifth embodiment providing that the anchoring structure of the second connecting part is a grooved connecting part;

FIG. 10 is a cross-sectional view of the connection member with the delivery head and sheath core tube provided in the sixth embodiment;

fig. 11 is a schematic structural view of a connector according to a sixth embodiment;

FIG. 12 is a schematic view of a lumen stent transporter in a complex vessel model according to an embodiment of the present invention.

Description of the main elements

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

First, it is emphasized that reference to "proximal" in the context of embodiments of the present invention refers to the end that is closer to the operator during operation; "distal" means the end that is distal to the operator during operation; "axial" refers to a direction parallel to the line joining the center of the distal end and the center of the proximal end of the medical device.

Referring to fig. 1, the first embodiment provides a lumen stent transporter 100, and the lumen stent transporter 100 includes a transporter head 1, and a sheath-core tube 2, a push rod 3 and a sheath tube 4 which are sequentially sleeved from inside to outside, and the sheath-core tube 2, the push rod 3 and the sheath tube 4 are coaxial.

Wherein, the sheath-core tube 2 is a tube cavity structure, and the far end of the sheath-core tube 2 is fixedly connected with the head part 1 of the conveyor. The push rod 3 is a tube cavity structure, the push rod 3 is sleeved at the near end of the sheath core tube 2, and the push rod 3 and the sheath core tube 2 are kept relatively fixed. And a distance is reserved between the push rod 3 and the conveyor head 1, so that a part of the sheath-core tube 2 is exposed out of the push rod 3 and the conveyor head 1. It will be appreciated that the segment is exposed a distance corresponding to the effective length of the compressed stent.

The sheath 4 has a lumen structure. The sheath tube 4 is sleeved on the push rod 3, and the sheath tube 4 can axially slide relative to the push rod 3 and the sheath core tube 2.

The conveyor head 1 is provided with a conveyor head proximal end face 13, the sheath tube 4 is provided with a sheath tube distal end face 44, the push rod 3 is provided with a push rod distal end face 33, when the sheath tube distal end face 44 is folded with the conveyor head proximal end face 13, an annular cavity is formed among the sheath tube 4, the exposed part of the sheath tube 2, the push rod 3 and the conveyor head 1, and the annular cavity is used for accommodating a compressed bracket (not shown in figure 1). When the sheath tube 4 axially slides and retracts until the distal end face 44 of the sheath tube is flush with the distal end face 33 of the push rod or the push rod 3 is partially exposed outside the sheath tube 4, the annular cavity disappears and the stent is released and opened.

Referring to fig. 2, fig. 2 shows the connection of the feeder head 1 and the sheath-core tube 2 in the first embodiment. The conveyor head 1 is fixedly connected with the sheath core tube 2 through a connecting piece 5. In this embodiment, the connecting piece 5 is completely accommodated in the conveyor head 1. The sheath-core tube 2 comprises a sheath-core tube distal end which is fixedly connected with the connecting piece 5. The head part 1 of the conveyor and the sheath core tube 2 are both in a cavity structure and are communicated with each other to be used as a guide wire channel, so that the lumen stent conveyor 100 can smoothly enter a preassigned position of the vascular lesion through the guide wire after passing through the guide wire.

Referring to fig. 2, the connecting member 5 includes a first connecting portion 52 and a second connecting portion 53 connected to a proximal end of the first connecting portion 52, wherein the first connecting portion 52 is fixedly connected to the sheath/core tube 2, and the second connecting portion 53 is fixedly connected to the transporter head 1. The longitudinal center axes of the first connecting portion 52 and the second connecting portion 53 are collinear. When the sheath-core tube 2 is sleeved in the connection 5, the sheath-core tube 2 is coaxial with the connecting piece 5. Referring to fig. 3, the axial length of the first connecting portion 52 is L1, the axial length of the second connecting portion 53 is L2, wherein the axial length L2 of the second connecting portion 53 is greater than the outer diameter of the sheath core tube 2, so that when the lumen stent delivery device 100 enters a complex and tortuous blood vessel environment, the position of stress concentration can be located inside the lumen of the connecting member 5, and the bending stress position can avoid the position of the stress concentration point, so as to bear a large bending force, and further, no fracture occurs, and further, the delivery device head 1 is prevented from falling off in a blood vessel of a human body.

Specifically, referring to fig. 4, in the present embodiment, the first connecting portion 52 is a cylinder structure. Referring to fig. 3 again, the first connecting portion 52 has a first through hole 522 formed in the middle thereof. The first connecting portion 52 is sleeved on the sheath-core tube 2, and an inner surface of the first connecting portion 52 is fixedly connected to an outer surface of the sheath-core tube 2.

The second connection portion 53 has a substantially cylindrical structure. The second connecting portion 53 has a second through hole 532 formed in the middle thereof. The second through hole 532 is communicated with the first through hole 522, so that the sheath-core tube 2 can axially penetrate through the connecting member 5, that is, the connecting member 5 is sleeved on the sheath-core tube 2. The second connecting portion 53 is sleeved on the sheath core tube 2, and the outer surface of the second connecting portion 53 is fixedly connected with the inner surface of the conveyor head 1.

The first connecting portion 52 and the second connecting portion 53 may be integrally formed, or may be fixedly connected by welding or the like.

The first connecting portion 52 is fixedly connected to the sheath-core tube 2 by welding, glue or injection molding. Wherein the welding is selected from metal laser welding, argon arc welding or ultrasonic welding. In this embodiment, the fixing means between the first connecting portion 52 and the sheath-core tube 2 may be several fixing points, or one or several fixing regions.

It is worth to be noted that, between the connecting member 5 and the sheath-core tube 2, at the fixing point of the first connecting portion 52, the connecting member 5 and the sheath-core tube 2 are tightly and fixedly connected; in other places, the second connection portion 53 is not fixedly connected to the sheath/core tube 2, and the inner diameter of the second connection portion 53 is substantially the same as that of the sheath/core tube 2. By the design, the stress concentration position is further positioned in the pipe cavity of the connecting piece 5, the bending stress position avoids the stress concentration position and bears larger bending force, and therefore the sheath core pipe 2 and the connecting piece 5 are prevented from being broken.

The second connecting portion 53 is fixedly connected to the feeder head 1 in a manner selected from glue connection or injection molding fixed connection. The second connecting portion 53 has an anchoring structure 57, and glue or injection molding material is injected into the anchoring structure 57 so that the second connecting portion 53 is fixedly connected to the feeder head 1 through the anchoring structure 57. In one embodiment, the anchoring structure 57 is selected from at least one of a threaded structure, a grooved structure, and an open slot structure. The anchoring structure 57, which is located on the outer surface of the second connecting portion 53 in direct contact with the inner region of the transporter head 1, may increase the coupling force of the transporter head 1 with the coupling member 5. Alternatively, the outer surface of the second connection portion 53 is a rough surface. For example, the outer surface of the second connecting portion 53 may be a frosted surface, and the frosted surface may be coated with glue or injection molding material to be in direct contact with the inner region of the conveyor head 1, so as to increase the connecting force between the conveyor head 1 and the connecting member 5.

Specifically, the anchoring structure 57 of the second connecting portion 53 in fig. 3 is a groove structure filled with glue or injection molding material, so that the second connecting portion 53 is fixedly connected with the conveyor head 1 by the glue or injection molding.

Specifically, as shown in fig. 4, in an embodiment, a plurality of grooves 533 may be opened on an outer wall of the second connection portion 53 to form a groove structure. Alternatively, in another embodiment, a plurality of protrusions 534 may be disposed on the outer wall of the second connection portion 53, and a groove 533 may be formed between two adjacent protrusions 534, so as to form a groove structure. In the embodiment, the groove structures are uniformly distributed along the circumferential direction of the second connecting portion 53, which is beneficial to increasing the contact position of the second connecting portion 53 and the glue connection or injection connection of the conveyor head 1, and improving the reliability of connection. In fig. 4, the protrusion 534 includes a protrusion 5341, the protrusion 5341 is in a ring shape and is disposed at the connection position with the first connection portion 52, and in other embodiments, the protrusion 5341 may be a plurality of small protrusions, which may be the same as or different from the other protrusions 534.

It will be appreciated that in other embodiments the distribution of the channel structures is not limited to a uniform distribution, but any distribution of channel structures that will allow for a reliable connection of the second connection 53 to the conveyor head 1.

The structure of the connecting member 5 of the second embodiment is shown in fig. 5. The connector 5 includes a first connecting portion 52 and a second connecting portion 53 connected to a proximal end of the first connecting portion 52, wherein the first connecting portion 52 has an axial length of L1, and the second connecting portion 53 has an axial length of L2. The first connecting portion 52 and the second connecting portion 53 are both hollow cylindrical structures, and the connecting member 5 is a hollow cylindrical structure integrally formed by the first connecting portion 52 and the second connecting portion 53. In the present embodiment, the anchoring structure of the second connecting portion 53 is two

open grooves

530 and 531 opened at the proximal end of the second connecting portion 53. The

open grooves

530 and 532 are symmetrically arranged about the longitudinal center axis of the link 5. In this embodiment, the

open grooves

530 and 532 are both U-shaped grooves, and the opening direction of the U-shaped grooves faces the proximal end in the axial direction. In other embodiments, the number of the open slot structures is not limited to two, and may be multiple, and the shape of the open slot structures is not limited to "U" shape, and may be circular, square, diamond, or irregular. The injection molding material or glue is added into the open slot structure, so that the connecting piece 5 is fixedly connected with the conveyor head 1.

Further, the first connecting portion 52 is provided with an open slot structure. As shown in fig. 5, two open grooves 521 are also opened at the distal end of the first connecting portion 52. In this embodiment, the two open grooves 521 are both U-shaped grooves, the two open grooves 521 are symmetrically disposed about the longitudinal central axis of the connecting element 5, the opening direction of the U-shaped groove faces the distal end along the axial direction, and the two open grooves 521 on the first connecting portion 52 and the two

open grooves

530 and 532 of the second connecting portion 53 are symmetrically disposed about the transverse central axis of the connecting element 5, respectively. In other embodiments, the number of the open grooves on the first connecting portion 52 is not limited to two, and may be a plurality of open grooves, the shape of the open groove structure is not limited to "U" shape, and may be circular, square, diamond or irregular shape, and the positions of the open grooves may not be symmetrical to the open grooves of the second connecting portion 53 about the transverse central axis of the connecting member 5.

The structure of the connecting member 5 of the third embodiment is shown in fig. 6. In the present embodiment, the connector 5 has a hollow cylindrical structure integrally formed by the first connection portion 52 and the second connection portion 53. The outer surface of the second connecting portion 53 has a frosted surface structure. The injection molded material or glue is applied to the frosted matte structure and then brought into direct contact with and secured to the conveyor head 1. The frosted roughened surface structure has a good anti-slip property, which is advantageous for more reliably connecting the conveyor head 1 to the second connecting portion 53.

The structure of the link 5 of the fourth embodiment is shown in fig. 7. In the present embodiment, the connector 5 has a hollow cylindrical structure integrally formed by the first connection portion 52 and the second connection portion 53. The outer surface of the second connection portion 53 is formed with an anchoring structure. The anchoring structure is a threaded structure. The injection-moulded material or glue is applied to the thread structure and then brought into direct contact with the conveyor head 1 and fixedly connected thereto. The screw thread structure has a good anti-slip property, which is advantageous for more reliably connecting the feeder head 1 with the second connecting portion 53.

The structure of the connecting member 5 of the fifth embodiment is shown in fig. 8 and 9. The connector 5 of the present embodiment has substantially the same structure as the connector 5 of the first embodiment. In contrast, the connection 5 of the present embodiment further includes an abutting portion 54. The abutment 54 is axially connected to the distal end of the first connection portion 52. The middle part of the abutting part 54 is provided with a third through hole 55. The third through hole 55 communicates with the first through hole 522 (see fig. 3) of the first connection portion 52 and the second through hole 532 of the second connection portion 53. The diameters of the third through holes 55 are smaller than the diameters of the first through holes 522 and the second through holes 532, and the diameter of the third through hole 55 is smaller than the outer diameter of the sheath/core tube 2. The sheath-core tube 2 further comprises a sheath-core tube distal end face 22, and the sheath-core tube distal end is inserted into the connecting member 5 so that the sheath-core tube distal end face 22 abuts against the abutting portion 54, thereby preventing the sheath-core tube 2 from penetrating through the connecting member 5, but allowing a guide wire to pass through the connecting member 5, and finally penetrating through the lumen of the transporter head 1. It is to be understood that, in this fifth embodiment, the other portions are the same as the first connection manner.

Referring to fig. 10 and 11, a sixth embodiment of the invention is shown, differing from the fifth embodiment in the manner of connection of the connecting piece 5 to the conveyor head 1. In this embodiment, the connector 5 is partially received within the carrier head 1 with the first connector portion 52 located inside the carrier head 1 and the second connector portion 53 partially located within the carrier head 1, with the second connector portion 53 including an anchor portion 57 and an exposed portion 58. In the present embodiment, the portion of the connector 5 located inside the feeder head 1 (including the anchor portion 57 of the first connecting portion 52 and the second connecting portion 53) and the portion exposed outside the feeder head 1 (including the exposed portion 58 of the second connecting portion 53) may be the same material or different materials. The exposed portion 58 of the second connection portion 53 has a different structure from the anchor portion 57 of the second connection portion 53, and the exposed portion 58 of the second connection portion 53 has a smooth surface. The smooth surface includes a smooth outer peripheral surface and a smooth proximal end surface.

Referring to fig. 10 and 11, the anchoring structure 57 of the second connecting portion 53 of the connecting member 5 is a channel structure that is located within the conveyor head 1. The groove structure here is slightly different from the groove structure in the fifth embodiment (see fig. 9), in which the groove structure here is composed of two annular protrusions 534 forming an annular groove 533, and the groove structure in the first embodiment is composed of a plurality of small protrusions distributed in an annular shape forming a net-shaped groove. It is understood that the trench structures mentioned in the first embodiment and the second embodiment may be the same or different. The groove structure can also be a plurality of small bulges which are distributed irregularly or a plurality of bulges with different sizes and shapes. In the present embodiment, the anchoring structure 57 of the second connecting portion 53 of the connecting member 5 may further be selected from at least one of a screw structure, a groove structure, and an open groove structure. Alternatively, the outer surface of the second connection portion 53 is a rough surface. For example, the outer surface of the second connecting portion 53 may be a frosted surface, and the frosted surface may be coated with glue or injection molding material to be in direct contact with the inner region of the conveyor head 1, so as to increase the connecting force between the conveyor head 1 and the connecting member 5. Other elements and the connection manner of the elements are the same as those of the first embodiment, and are not described herein again.

In the embodiment of the invention, the part of the connector 5, which is accommodated in the conveyor head, can not protrude out of the outer edge surface of the conveyor head 1, so that the connector is exposed out of the outer edge surface of the conveyor head 1, and the blood vessel is prevented from being scratched in the clinical process due to exposure.

The connecting piece 5 is arranged between the conveyor head 1 and the sheath core tube 2, the first connecting part 52 and the second connecting part 53 are arranged on the connecting piece 5, the first connecting part 52 is fixedly connected with the sheath core tube 2, the second connecting part 53 is fixedly connected with the conveyor head 1, and the axial length of the second connecting part 53 is greater than the outer diameter of the sheath core tube 2, so that when the conveyor 100 of the lumen stent enters the complex and tortuous blood vessel 200 environment, as shown in fig. 12, the stress concentration position can be positioned in the lumen of the connecting piece 5, and the bending stress position can avoid the stress concentration position, so that larger bending force can be borne, further, the conveyor head 1 is prevented from falling off in the blood vessel 200 of a human body.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A lumen stent conveyor comprises a conveyor head, a sheath-core tube and a connecting piece, wherein the connecting piece is at least partially accommodated in the conveyor head, and is characterized in that the connecting piece comprises a first connecting part and a second connecting part connected with the proximal end of the first connecting part, the first connecting part is fixedly connected with the sheath-core tube, the second connecting part is fixedly connected with the conveyor head, and the axial length of the second connecting part is greater than the outer diameter of the sheath-core tube; the second connecting part is sleeved on the sheath core pipe.

2. The lumen stent transporter of claim 1, wherein the first connecting portion is sleeved on the sheath core tube, and an inner surface of the first connecting portion is fixedly connected with an outer surface of the sheath core tube.

3. The luminal stent transporter of claim 1, wherein an outer surface of the second connecting portion is fixedly connected to an inner surface of the transporter head.

4. The luminal stent transporter of any one of claims 1 to 3, wherein the outer surface of the second connecting portion is formed with an anchoring structure.

5. The luminal stent transporter of claim 4, wherein the anchoring structure is selected from at least one of a threaded structure, a grooved structure, and an open slot structure.

6. The luminal stent transporter of claim 3, wherein the outer surface of the second connecting portion is roughened.

7. The luminal stent transporter of claim 3, wherein the second connecting portion is connected to the transporter head by glue or by injection molding.

8. The luminal stent transporter of claim 1, wherein said first connection portion is located inside said transporter head and said second connection portion is located at least partially within said transporter head.

9. The luminal stent transporter of claim 8, wherein when the second connecting portion is partially located at the transporter head, a proximal end of the second connecting portion protrudes out of the transporter head, and the proximal end of the second connecting portion has a smooth surface.

10. The luminal stent transporter of claim 1, wherein the connector further comprises an abutment connected to the distal end of the first connector, the distal end of the sheath core tube abutting the abutment.