Delivery structure and trap delivery device having the same

Abstract

The application relates to a conveying structure, which comprises a supporting part, a telescopic part and a conveying guide wire, the telescopic part is made of a developing material, is fixed on the conveying guide wire near a distal end position, the supporting part is made of a developing material, is fixed on the conveying guide wire, is arranged on at least one side of the telescopic part, and the supporting part is attached to the telescopic part or has a preset gap between the supporting part and the telescopic part. On the premise of ensuring the stability of mechanical transmission, the supporting part further applies an axial force through the telescopic part to control the limiting positioning of the supporting part, so that element failure is avoided in the releasing and recycling process. Meanwhile, the telescopic part has high compliance, so that the flexibility of the whole instrument is improved, the rigidity of the whole instrument is reduced, the passing capacity of the instrument is improved, the resistance in the pushing process is reduced, the operation feeling of a surgeon is improved, and the clinical risk is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a delivery structure and a thrombus capturing delivery device having the same. BACKGROUND

[0002] Minimally invasive interventional surgery is a common treatment for internal carotid artery stenosis. At present, the main treatment technologies for internal carotid artery stenosis include balloon expansion, balloon stent implantation, self-expanding stent implantation and other methods. Among them, stent implantation is a common treatment for internal carotid artery stenosis.

[0003] However, during the treatment of the stenosis lesion, the handling of the plaque by the instrument can cause small plaques to detach and be carried by the blood flow to the distal cerebral vessels, causing the distal vessels to be blocked. Therefore, during the treatment, a thrombus capturing device is used to capture the escaped thrombus to prevent it from blocking the distal vessels. Based on this, the action site of the thrombus capturing device is located distal to the lesion to block it. Therefore, the thrombus capturing device has a higher requirement for the ability to reach the lesion and pass through the stenosis lesion. This requires a suitable delivery system to meet the premise of mechanical performance transmission, have better flexibility, and ensure that the thrombus capturing device can smoothly pass through the lesion and reach the ideal position.

[0004] In summary, the delivery of the thrombus capturing device through the delivery guide wire can be advanced or withdrawn in the blood vessel, but when passing through a blood vessel with a more serious stenosis lesion, the smoothness of the pushing and withdrawing of the thrombus capturing device in the prior art still needs to be improved. SUMMARY

[0005] Therefore, the present application provides a delivery structure suitable for delivery or withdrawal in a blood vessel, which comprises a support part, an extension part and a delivery guide wire. The extension part is made of a developing material and is fixed on the delivery guide wire near the distal end. The support part is made of a developing material and is fixed on the delivery guide wire, and is arranged on at least one side of the extension part. The support part is attached to the extension part or has a predetermined gap between the support part and the extension part.

[0006] In one possible implementation, when the support part is arranged on both sides of the extension part, the support part comprises a delivery element and a recovery element. The delivery element is arranged at the distal end of the extension part, and the recovery element is arranged at the proximal end of the extension part. The structure of the delivery element is the same as that of the recovery element.

[0007] In one possible implementation, the delivery element and the recovery element are symmetrically arranged on both sides of the extension part.

[0008] In a possible implementation, the telescopic part is in a hollow cylindrical structure, and the supporting part is also in a hollow cylindrical structure, and the telescopic part has the same diameter as the supporting part.

[0009] In a possible implementation, the area of the end face of the supporting part close to one end of the telescopic part gradually increases to the area of the end face of the supporting part away from the one end of the telescopic part.

[0010] In a possible implementation, the supporting part is in a hypotube structure, and hollow holes are arranged on the supporting part at intervals, the hollow holes are in a strip shape, and the hollow holes are arranged along the radial direction of the supporting part or at a preset inclined angle with respect to the radial direction of the supporting part.

[0011] In a possible implementation, the telescopic part is a variable-pitch spring, and the pitch length of the middle section of the telescopic part is greater than the pitch lengths of the two sides of the telescopic part.

[0012] In a possible implementation, the telescopic part is a variable-radius spring, and the radius length of the middle section of the telescopic part is greater than the radius lengths of the two sides of the telescopic part.

[0013] In a possible implementation, the preset gap is less than or equal to 1 mm.

[0014] In a possible implementation, the delivery guide wire is in a cylindrical wire, and includes a proximal end section, a tapered section, and a distal end section connected in sequence from the proximal end to the distal end; the diameter of the proximal end section is greater than the diameter of the distal end section, and the distal end of the distal end section has a flexible section; the diameter of the tapered section gradually decreases from the proximal end to the distal end; and the telescopic part and the supporting part are both arranged on the distal end section.

[0015] In a possible implementation, the length of the supporting part in the axial direction of the delivery guide wire has a preset ratio with the length of the telescopic part in the axial direction of the delivery guide wire, and the preset ratio is within [1:1.5, 1:5].

[0016] In a possible implementation, the preset ratio is 1:3.

[0017] In another aspect, the application further provides a catch delivery device, which includes the delivery structure, the catch component, and the sheath in any of the possible implementations, the catch component is hollow, and both ends of the catch component are fixed to the delivery structure through fixing points, the telescopic part and the supporting part are arranged between the two fixing points, the telescopic part and the supporting part do not interfere with the catch component, and the sheath is arranged outside the delivery structure and the catch component.

[0018] In a possible implementation, the catch member, the telescopic part and the support part are coaxially arranged along the delivery guide wire.

[0019] The beneficial effects of the present application: through the support part and the telescopic part arranged on the delivery guide wire, the operator can push or retrieve the end of the delivery guide wire more smoothly along the axial direction when operating the delivery structure to push mechanically, and the telescopic part can ensure that the delivery structure as a whole has a certain flexibility, so as to move in the narrow blood vessel and reach the distal lesion site. Furthermore, the support part can further exert an axial force to control the limiting positioning of the support part under the premise of ensuring the stability of mechanical transmission, so as to avoid element failure during release and retrieval. At the same time, the telescopic part has high compliance, so as to improve the flexibility of the whole instrument, reduce the rigidity of the whole instrument, improve the passing ability of the instrument, reduce the resistance in the pushing process, improve the operation feeling of the operator, and reduce the clinical risk.

[0020] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and serve to explain the principles of the present application.

[0022] Figure 1 A side view of the delivery structure of the embodiment of the present application is shown;

[0023] Figure 2 A cross-sectional view of the catch delivery device of the embodiment of the present application is shown;

[0024] Figure 3 A partial enlarged view of the support part of the cylindrical structure of the embodiment of the present application is shown;

[0025] Figure 4 A partial enlarged view of the support part of the conical structure of the embodiment of the present application is shown;

[0026] Figure 5 A partial enlarged view of the support part of the hypotube structure of one embodiment of the present application is shown;

[0027] Figure 6 A partial enlarged view of the support part of the hypotube structure of another embodiment of the present application is shown;

[0028] Figure 7 A partial enlarged view of the larger pitch telescopic part of the embodiment of the present application is shown;

[0029] Figure 8 A partial enlarged view of the variable-pitch telescopic part of the embodiment of the application is shown.

[0030] Figure 9 A partial enlarged view of the variable-diameter telescopic part of the embodiment of the application is shown. DETAILED DESCRIPTION

[0031] Various exemplary embodiments, features and aspects of the present application will be described in detail, with reference to the accompanying drawings. The same reference numbers in different drawings denote the same or similar elements throughout the drawings. Although various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0032] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate relative or positional relationships based on the orientation or position shown in the drawings, and are used only for convenience of description of the present application or simplification of description, and therefore cannot be construed as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0033] In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be construed 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 one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise specifically limited.

[0034] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0035] In addition, in order to better illustrate the present application, numerous specific details are given in the following detailed description. Those skilled in the art will understand that the present application can also be implemented without some specific details. In some examples, methods, means, elements and circuits well known to those skilled in the art are not described in detail in order to highlight the main idea of the present application.

[0036] Figure 1 A side view of the delivery structure of the embodiment of the application is shown. Figure 2 A cross-sectional view of the catch delivery device of the embodiment of the application is shown. Figure 3 A partial enlarged view of the support part of the cylindrical structure of the embodiment of the application is shown.

[0037] Figure 4 A partial enlarged view of the supporting part of the conical structure of the embodiment of the application is shown; Figure 5 A partial enlarged view of the supporting part of the hypotube structure of one embodiment of the application is shown; Figure 6 A partial enlarged view of the supporting part of the hypotube structure of another embodiment of the application is shown; Figure 7 A partial enlarged view of the large-pitch telescopic part of the embodiment of the application is shown; Figure 8 A partial enlarged view of the variable-pitch telescopic part of the embodiment of the application is shown; Figure 9 A partial enlarged view of the variable-diameter telescopic part of the embodiment of the application is shown.

[0038] As shown in the drawings, Figures 1-9 The delivery structure includes a supporting part 100, a telescopic part 102, and a delivery guide wire 420. The telescopic part 102 is made of a developing material and is fixed on the delivery guide wire 420 near the distal end. The supporting part 100 is made of a developing material and is fixed on the delivery guide wire 420. At least one side of the telescopic part 102 is provided with the supporting part 100. The supporting part 100 and the telescopic part 102 are attached to each other or have a preset gap.

[0039] In this embodiment, the supporting part 100 and the telescopic part 102 are attached to each other or have a preset gap on the delivery guide wire 420. When the operator operates the delivery structure to mechanically push, the supporting part 100 and the telescopic part 102 are combined, the supporting part 100 is arranged to enable the end of the delivery guide wire 420 to be more smoothly pushed or recovered along the axial direction during mechanical pushing, and the telescopic part 102 is arranged to ensure that the overall delivery structure has a certain flexibility, facilitating movement in narrow blood vessels, so as to reach the distal lesion site. Moreover, under the premise of ensuring stable mechanical transmission, the supporting part 100 further applies an axial force through the telescopic part 102 to control the limiting positioning of the supporting part 100, so as to avoid element failure during release and recovery. At the same time, the telescopic part 102 has high compliance to improve the overall flexibility of the instrument, reduce the overall rigidity of the instrument, improve the passing ability of the instrument, reduce the resistance during pushing, improve the operator's operation feeling, and reduce the clinical risk.

[0040] More specifically, the preset gap between the supporting part 100 and the telescopic part 102 is less than 1 mm. The supporting part 100 with the preset gap has a longer axial length on the delivery guide wire, which is convenient for adapting to a longer thrombus capturing component 202. Under the premise of ensuring sufficient stability of the axial mechanical transmission of the supporting part 100 and the telescopic part 102 on the delivery guide wire 420, the distance between the two ends of the supporting part 100 and the telescopic part 102 is longer, so as to adapt to and act on the longer thrombus capturing component 202.

[0041] In one specific embodiment, the ratio of the axial length of the support part 100 to the axial length of the telescopic part 102 along the delivery guide wire 420 is a preset ratio, which is within [1:1.5, 1:5].

[0042] In this embodiment, it is noted that the support part 100 can serve as the two ends of the telescopic part 102 in this scheme, and a telescopic part 102 that is too short cannot provide the better flexibility effect for the overall delivery structure of the present application, so the preset ratio is limited within [1:1.5, 1:5], which ensures that the delivery structure of the present application is reasonable in design, and the telescopic part 102 has high compliance to improve the flexibility of the overall instrument, has good passability in intracranial blood vessels, and can provide sufficient support strength for the thrombus capturing component 202 during pushing or retracting.

[0043] In one specific embodiment, preferably, the ratio of the axial length of the support part 100 to the axial length of the telescopic part 102 along the delivery guide wire 420 is 1:3.

[0044] The delivery structure with the ratio of the axial length of the support part 100 to the axial length of the telescopic part 102 along the delivery guide wire 420 being 1:3 can cope with most use scenarios of the delivery or retraction of the thrombus capturing component 202. The delivery structure with this ratio can be used as a conventional device, and this ratio can better balance mass production of parts and most non-extreme use scenarios or individual cases.

[0045] In one specific embodiment, when the support part 100 is arranged on both sides of the telescopic part 102, the support part 100 includes a delivery element 101 and a recovery element 103, the delivery element 101 is arranged at the distal end of the telescopic part 102, and the recovery element 103 is arranged at the proximal end of the telescopic part 102, and the structure of the delivery element 101 is the same as that of the recovery element 103.

[0046] In this embodiment, preferably, the support part 100 is arranged on both sides of the telescopic part 102 and attached to each other, the support part 100 includes a delivery element 101 at the distal end of the telescopic part 102 and a recovery element 103 at the proximal end, the delivery element 101 at the distal end provides better pushing force for the thrombus capturing component 202 during pushing, and the recovery element 103 at the proximal end can provide better retraction force for the thrombus capturing component 202 during overall retraction. The telescopic part 102 between the two is usually a spring, which is arranged between the delivery element 101 and the recovery element 103 to ensure stable axial mechanical transmission and facilitate the relative fixation of the delivery element 101 and the recovery element 103, thereby avoiding the phenomenon of element slipping and failure during clinical use.

[0047] More specifically, compared with the support part 100 with a preset gap setting of the telescopic part 102, the two are attached to ensure that the pushing force or the retraction force transmitted along the delivery guide wire 420 during pushing or retraction can be more effectively transmitted, reducing the loss of distal force during surgery, thereby saving the operator's physical strength and reducing the failure rate during surgery.

[0048] In one specific embodiment, the delivery element 101 and the retraction element 103 are symmetrically arranged on both sides of the telescopic part 102.

[0049] In this embodiment, the delivery element 101, which is optionally made of a radiopaque material such as platinum, platinum-iridium, platinum-tungsten, tantalum, etc., is connected to the delivery guide wire 420 by bonding or welding.

[0050] The retraction element 103, which is optionally made of a radiopaque material such as platinum, platinum-iridium, platinum-tungsten, tantalum, etc., is connected to the delivery guide wire 420 by bonding or welding.

[0051] Preferably, the delivery element 101 and the retraction element 103 have the same structure and are symmetrically arranged with respect to the telescopic part 102, which ensures better stability and facilitates production of the delivery element 101 and the retraction element 103. The radiopaque delivery element 101, the telescopic part 102, and the retraction element 103 help the operator to understand the positioning of the components at the distal lesion site from the external environment, which facilitates detailed operation during surgery and improves surgical efficiency.

[0052] In one specific embodiment, the telescopic part 102 has a hollow cylindrical structure, and the support part 100 has a hollow cylindrical structure with the same diameter as the telescopic part 102.

[0053] In this embodiment, the telescopic part 102 with a hollow cylindrical structure has stable mechanical transmission.

[0054] In one specific embodiment, the area of the end face of the support part 100 near one end of the telescopic part 102 gradually increases to the end face away from the other end of the telescopic part 102.

[0055] In this embodiment, the taper direction is from the side adjacent to the telescopic part 102 to the side away from the telescopic part 102, and the end face of the support part 100 gradually increases. The support part 100 with a tapered design can reasonably and effectively improve the clamping ability of the end face and avoid unloading at the force receiving part during the process of pushing the device to the distal end and retracting the device after capturing the thrombus.

[0056] The catch member 202 is coaxially arranged with the telescopic part 102 and the support part 100 from the circumferential direction, and is arranged outside the telescopic part 102 and the support part 100. The hollow catch member 202 can ensure that it does not interfere with each other. Only the end face of the support part 100 away from the telescopic part 102 can contact the catch member 202 when pushing or retracting, and the pushing force or the retracting force can be transmitted to the catch member 202.

[0057] In one embodiment, the support part 100 has a hypotube structure, wherein the support part 100 is provided with a plurality of hollow holes arranged at intervals. The hollow holes are long strips, and the hollow holes are arranged along the radial direction of the support part 100 or at a predetermined inclined angle with respect to the radial direction of the support part 100.

[0058] In this embodiment, the delivery element 101 and the recovery element 103 can have a hypotube structure, and the cross-sectional shape of the hypotube structure includes a rectangle, a trapezoid, or a rectangle with a thread cutting pattern. The hypotube structure improves the flexibility of the two-end support part 100 in the tortuous blood vessel, reduces the pushing resistance, and has a certain rigidity and is not easy to deform.

[0059] It should be particularly pointed out that the telescopic property of the telescopic part 102 cannot be used in the delivery or retraction process. In this application, the main function of the telescopic part 102 is to provide better flexibility, and the telescopic property is helpful for the delivery or retraction of the delivery structure. Therefore, the telescopic part 102 is fixed on the delivery guide wire 420 by using single-point fixing, multi-point fixing, and filling fixing, which will not affect the flexible property of the telescopic part 102.

[0060] More specifically, when the telescopic part 102 is bonded or welded, it can be fixed and connected by being fixed at both ends on the delivery guide wire 420, or the inner cavity can be filled, such as by using a filling glue, a tin ball, and the like. Therefore, the fixing mode of the telescopic part 102 is not limited in this application.

[0061] In one embodiment, the telescopic part 102 is a variable-pitch spring, and the pitch length of the middle section of the telescopic part 102 is greater than the pitch length of both sides of the telescopic part 102.

[0062] In this embodiment, the telescopic part 102 is a variable-pitch spring, and the pitch length of the middle section of the telescopic part 102 is greater than the pitch length of both sides of the telescopic part 102. That is, the both ends of the telescopic part 102 are loosely wound, and the middle section is tightly wound, forming a transition from large to small to large in rigidity. The overall flexibility of the component is improved under the premise of ensuring the fixing effect of the telescopic part 102.

[0063] In one embodiment, the telescopic part 102 is a variable-pitch spring, and the pitch length of the middle section of the telescopic part 102 is greater than the pitch length of both sides of the telescopic part 102.

[0064] In this embodiment, the telescopic part 102 adopts a variable outer diameter design, the outer diameter of the middle part of the telescopic part 102 is increased in design, which ensures a larger inner cavity, so as to enhance the connection between the telescopic part 102 and the delivery guide wire 420, avoid the telescopic part 102 from being unloaded to cause the device to fail, and the outer diameters of the two ends are consistent with the delivery and recovery element 103, so as to protect the end of the telescopic part 102 from being damaged. Compared with increasing the outer diameter of the telescopic part 102 as a whole, the telescopic part 102 with variable diameter design can avoid too large rigidity, which brings too large resistance when pushing or retracting, and affects the progress of the operation.

[0065] In the above embodiment, the telescopic part 102 can be made of platinum, platinum-iridium, platinum-tungsten, tantalum or other developing wire materials, or stainless steel, nickel-titanium, cobalt-chromium or other commonly used metal wire materials, or silicone, polyurethane or other high polymer wire materials, and is connected with the delivery guide wire 420 by bonding, welding or other methods.

[0066] In one specific embodiment, the delivery guide wire 420 is a cylindrical wire, which includes a proximal end segment, a tapered segment and a distal end segment connected in sequence from the proximal end to the distal end, the diameter of the proximal end segment is larger than that of the distal end segment, and the distal end of the distal end segment has a flexible segment 305, the diameter of the tapered segment gradually decreases from the proximal end to the distal end, and the telescopic part 102 and the support part 100 are both arranged on the distal end segment.

[0067] Further, the distal end of the distal end segment of the delivery guide wire 420 has a flexible segment 305, which can effectively avoid the delivery structure of the present application from causing harm to the human body and play a buffering role.

[0068] In this embodiment, the material of the delivery guide wire 420 can be stainless steel or nickel-titanium, and the material of the soft segment at the end thereof can be platinum, platinum-iridium, platinum-tungsten, tantalum or other developing materials, which are connected with the delivery guide wire 420 by bonding, welding or other methods.

[0069] On the other hand, the present application also proposes a catch delivery device, which includes the delivery structure in any one of the above embodiments, a catch component 202 and a sheath 270, the catch component 202 is hollow inside, and the two ends are fixed on the delivery structure through fixed points, and the positions of the telescopic part 102 and the support part 100 are located between the two fixed points, the telescopic part 102 and the support part 100 do not interfere with the catch component 202, the sheath 270 is arranged outside the delivery structure and the catch component 202 as a whole, and the catch component 202 and the telescopic part 102 are coaxially arranged along the delivery guide wire 420.

[0070] Based on any one of the foregoing delivery structures, the present application further provides a trap delivery device. The trap delivery device of the present application comprises any one of the foregoing delivery structures. By threading any one of the foregoing delivery structures into a sheath, and mounting the trap component 202 outside the support portion 100 and the telescopic portion 102, when the operator mechanically pushes or mechanically withdraws the delivery guide wire 420, the axial mechanical transmission stability of the delivery guide wire 420 and the relative fixation to the support portion 100 can be effectively ensured, so that the trap delivery device is more easily operated by the operator, the proximal operation is more smooth, and the surgical efficiency is improved.

[0071] In this embodiment, the center point of the two end fixing points of the trap component 202 coincides with the center points of the delivery element 101, the recovery element 102, and the recovery element 103, that is, the delivery element 101, the recovery element 102, and the recovery element 103 are arranged at the middle position of the trap component 202.

[0072] It should be further particularly pointed out that the specific structure of the trap component 202 is not changed in the present application, and it is only necessary to ensure that the end surface of the support portion 100 away from the telescopic portion 102 can contact the trap component 202 when pushing, and the force is transmitted to the trap component 202, so that the trap delivery device of the present application can be adapted to the trap component 202, and therefore the structure of the trap component 202 is not more specifically limited in the present application.

[0073] In summary, in the carotid artery stenosis stent angioplasty, the specific working process of the trap delivery device of the present application is as follows:

[0074] 1. The trap component 202 is compressed in the sheath 270, and first reaches the distal blood vessel of the stenosis lesion through the 0.014 micro guide wire, and then the delivery guide wire 420 is pushed from the proximal end, so that the delivery element 101 contacts the trap device and pushes it out of the sheath 270;

[0075] 2. After the trap component 202 is completely released in the internal carotid artery and smoothly opened, the carotid artery stent is implanted through the trap component 202 delivery guide wire 420, and the carotid artery stent is released at the stenosis lesion. During the release of the stent, the unstable plaque at the stenosis lesion will be separated and flow to the distal end of the blood vessel along the blood flow. At this time, the trap device smoothly opened at the distal end of the lesion can capture the emboli in the blood flow to prevent the emboli from entering the intracranial blood vessels and causing intracranial blood vessel occlusion;

[0076] 3. After the emboli are captured, the delivery guide wire 420 is withdrawn, the recovery element 103 contacts the trap component 202, and the trap component 202 is smoothly withdrawn into the sheath 270 after being slightly withdrawn with force. At this time, the captured escape emboli are recovered into the sheath 270 together with the trap component 202;

[0077] 4. Then the whole trap delivery device is withdrawn until it is outside the body, and the carotid angioplasty and the trap operation in the operation are successfully completed.

[0078] Embodiments of the application have been described above, with the understanding that these descriptions are exemplary only, and are not intended to be exhaustive or to limit the embodiments disclosed to the precise details of the description. Changes and modifications can readily occur to those skilled in the art, which changes and modifications are intended to be encompassed by the above-described embodiments. The terminology used herein is for the purpose of describing the embodiments only and is not intended to be limiting. The scope of the disclosure is limited only by the claims.

Claims

1. A delivery structure suitable for delivery or retraction within a blood vessel, characterized in that, The support part, the telescopic part and the delivery guide wire are included; The telescopic part is made of developing material and is fixed on the delivery guide wire near the distal end. The telescopic part is a variable diameter spring or a variable pitch spring. The pitch length of the middle section of the telescopic part is greater than the pitch length of the two sides of the telescopic part. The radius length of the middle section of the telescopic part is greater than the radius length of the two sides of the telescopic part. The support part is made of developing material and is fixed on the delivery guide wire. At least one side of the telescopic part is provided. The support part is attached to the telescopic part or has a preset gap between the support part and the telescopic part. The preset gap is less than or equal to 1mm. The support part is in the form of a hypotube structure. The support part is provided with a hollow hole. The hollow hole is in the form of a strip. The hollow hole is provided along the radial direction of the support part or at a preset inclined angle with the radial direction of the support part.

2. The delivery construct of claim 1, wherein, When the support part is provided on both sides of the telescopic part, the support part includes a delivery element and a recovery element. The delivery element is provided at the distal end of the telescopic part. The recovery element is provided at the proximal end of the telescopic part. The structure of the delivery element is the same as that of the recovery element.

3. The delivery construct of claim 2, wherein, The delivery element and the recovery element are symmetrically provided on both sides of the telescopic part.

4. The delivery construct of claim 1, wherein, The telescopic part is in the form of a hollow cylindrical structure. The support part is in the form of a hollow cylindrical structure. The diameter of the telescopic part is the same as that of the support part.

5. The delivery construct of claim 1, wherein, The area of the end face of the support part near one end of the telescopic part gradually increases to the end face of the support part away from one end of the telescopic part.

6. The delivery construct of claim 1, wherein, The delivery guide wire is in the form of a cylindrical wire. The proximal end section, the tapered section and the distal end section are sequentially connected from the proximal end to the distal end. The diameter of the proximal end section is greater than the diameter of the distal end section. The distal end of the distal end section has a flexible section. The diameter of the tapered section gradually decreases from the proximal end to the distal end. The telescopic part and the support part are provided on the distal end section.

7. The delivery construct of any of claims 1-6, wherein, The length of the support part in the axial direction of the delivery guide wire and the length of the telescopic part in the axial direction of the delivery guide wire have a preset ratio. The preset ratio is within [1:1.5, 1:5].

8. The delivery construct of claim 7, wherein, The preset ratio is 1:

3.

9. A catch delivery device, characterized by The delivery structure, the catch part and the sheath tube are included. The catch part is hollow. The two ends are fixed on the delivery structure through fixed points. The telescopic part and the support part are provided between the two fixed points. The telescopic part and the support part do not interfere with the catch part. The sheath tube is provided outside the delivery structure and the catch part.

10. The catch delivery device of claim 9, wherein, The catch part, the telescopic part and the support part are coaxially provided along the delivery guide wire.

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