Neurovascular stent conveying device

Abstract

The present application discloses a stent delivery device configured to selectively place a self-expanding stent at a target location. In at least one embodiment, the delivery mechanism is configured to be selectively coaxially placed within and removably engaged with the stent. The delivery mechanism provides at least one self-expanding delivery cannula, each delivery cannula being provided with a proximal end cap at a proximal end thereof and a distal end cap at an opposite distal end thereof. An engagement mechanism is disposed within the delivery sleeve and provides an elongate engagement shaft and at least one stent snap. The delivery cannula includes an elongate engagement shaft engaged with the proximal and / or distal end of the delivery cannula and having an axially extending length within the delivery cannula, and at least one stent buckle located on the engagement shaft and configured to removably engage with a stent.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, specifically relating to a neurovascular stent delivery device. Background Technology

[0002] The subject matter of this patent application generally relates to endovascular therapeutic devices and delivery systems, and more particularly to a neurovascular stent delivery device that enables easier placement and repositioning of the stent before full deployment.

[0003] The applicant hereby incorporates, by reference, all patents and published patent applications cited or mentioned in this application.

[0004] As background information, vascular diseases, particularly those affecting the neurovascular system, including intracranial arteriosclerosis (ICAD) and aneurysms, are a key focus of innovation. According to the U.S. Centers for Disease Control and Prevention (CDC), cerebrovascular disease ranked fifth among all causes of death in the United States in 2020.

[0005] Stent implantation involves accessing a patient's vascular system and deploying a mesh-like tube to provide structural support for the blood vessels. This can be used to treat blood vessels with accumulated fatty deposits or plaque buildup, i.e., atherosclerosis, or to support damaged or structurally compromised vessels. In the neurovascular system, the most significant use of stent implantation is in stroke prevention or treatment of recurrent strokes.

[0006] Stents can be classified as self-expanding stents or those that expand mechanically, such as via balloons. During manufacturing, the stent is loaded onto a suitable delivery system; for self-expanding stents, this is placed within a guide sheath, while for non-self-expanding stents, it is placed on a balloon catheter. During the procedure, the interventional physician uses various assistive devices to determine the treatment site, including guides, guide catheters, guidewires, microcatheters, and fluoroscopic imaging. The physician then inserts the delivery system into a guide catheter or microcatheter suitable for the treatment anatomy. The delivery system with the pre-loaded stent is then advanced to the target location, and a self-expanding stent is placed by withdrawing the guide catheter or microcatheter, or a non-self-expanding stent is mechanically forced open by applying internal pressure to the balloon catheter.

[0007] Stent implantation in the tortuous, small vessels of the neurovascular system presents additional challenges due to the complexity of the anatomy and the reduced size of the vessels. The high tortuosity of the neurovascular system demands more flexible instruments, while the reduced vessel size necessitates a corresponding reduction in the size of instruments and any accessories to accommodate the smaller vessels. Because the vessels in the neurovascular system are both small and tortuous, instruments used in this anatomical structure must be specially designed to accommodate this characteristic. Furthermore, the limited use of auxiliary instruments must be carefully considered, as simultaneously employing multiple instruments in the neurovascular system can be very difficult or even impossible.

[0008] Accuracy of stent placement is crucial in stent delivery to ensure maximum effectiveness. This is especially critical in more tortuous anatomical structures, such as near bifurcation aneurysms. Inaccurate stent placement, extending beyond the intended vessel wall and into an open vessel, exposes the patient to a significant risk of thrombosis. This risk is further amplified in critical sites, such as the neurovascular system, where improper stent placement can increase the risk of stroke. In larger vessels, techniques using assistive devices (such as guidewires or balloon catheters) have been developed to improve stent placement accuracy. In the neurovascular system, the reduced vessel diameter and tortuosity either preclude the use of these techniques or increase their risks and / or difficulty. Therefore, there is a pressing need for a stent and stent delivery system that improves stent placement accuracy without the need for assistive devices or advanced techniques.

[0009] One method to provide additional stent placement accuracy is to retrieve the stent before it is fully deployed. This provides an interventional physician with an opportunity to reposition the stent if it does not deploy as intended. An example of such a prior art solution can be found in U.S. Patent Publication No. 2023 / 0338175, belonging to Park et al. In this patent, the stent includes a cylindrical portion forming a stent frame having an outer mesh-like structure formed by a plurality of interconnected segments configured to apply radial force to the vessel wall. The corresponding stent delivery system includes a locking mechanism configured to engage the proximal end of the stent frame when the stent frame and pushwire are received in a sheath (e.g., a catheter). The locking mechanism includes a proximal retaining disc and a distal retaining disc, the distal retaining disc having a plurality of slots configured to engage an equal number of struts formed on the proximal end of the stent. Thus, the lateral opposing teeth of each slot pass through mesh holes in the mesh stent to assist stent passage through the sheath. However, in such prior art solutions, once the stent expands and detaches from the delivery system, the stent delivery system tends to expose the teeth. Therefore, one or more teeth may protrude and engage with the stent's mesh openings, especially when the stent is located within a tortuous blood vessel, potentially snagging the stent during subsequent removal of the stent delivery system. This can cause the stent to be pulled out of position and lead to procedural complications.

[0010] Therefore, there remains a need for a repositionable and compact stent and its corresponding delivery system that meets the functional requirements for effective treatment of vascular diseases without affecting patient outcomes or introducing additional risks. Various aspects of the present invention address these needs and provide other related advantages, as described in the following summary of the invention.

[0011] It should be noted that the information included in the above background description may help in understanding various aspects of the present invention. This does not imply that any information provided herein is prior art or related to the present invention, nor does it imply that any particular or implicitly referenced publication is prior art. Summary of the Invention

[0012] Various aspects of the present invention provide certain advantages in terms of structure and use, which lead to the exemplary advantages described below.

[0013] The present invention addresses the aforementioned problems by providing a neurovascular stent device. This neurovascular stent device is configured to selectively place a self-expanding stent at a target location. The stent is constructed from a plurality of independent stent struts woven together, thereby defining a plurality of stent gaps along the length of the stent between the intersecting stent struts; or a frame formed from a laser-cut tube having an outer grid network of a plurality of interconnected stent struts with stent gaps between the struts. The stent is configured to transition between two forms: an elongated and unexpanded form, in which the outer diameter of the stent is smaller than the inner diameter of the catheter; and a relatively larger expanded form, in which the outer diameter and configuration of the stent allow it to effectively fill the target location. In at least one embodiment, a delivery mechanism is configured to be selectively coaxially placed within the stent and detachably engaged with the stent. The delivery mechanism provides a proximal pusher wire, engaged proximally with the delivery mechanism and configured to move the delivery mechanism and the stent through the catheter; a distal pusher wire, located at the relatively distal end of the delivery mechanism and configured to assist in guiding the delivery mechanism and the stent through the catheter; and at least one self-expanding delivery cannula, located between the proximal and distal pusher wires. At least one delivery sleeve, each of which provides a plurality of intersecting sleeve supports defining a plurality of sleeve gaps between the interconnected sleeve supports along the length of the delivery sleeve. The delivery sleeve is configured to transition between two configurations: an elongated, undeployed configuration in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that the delivery sleeve is coaxially positioned within the support when the support is in the undeployed configuration; and a relatively larger deployed configuration. A proximal cap is located at the proximal end of the delivery sleeve, and a distal cap is located at the relatively distal end of the delivery sleeve. An engagement mechanism is disposed within the delivery sleeve and provides an elongated engagement shaft and at least one support latch. The elongated engagement shaft engages with the proximal and / or distal end of the delivery sleeve and has an axially extending length within the delivery sleeve; the at least one support latch is located on the engagement shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in the undeployed configuration. At least one support clip has a length from its end to the axial centerline that is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed states, at least one support clip disengages from the delivery sleeve. When using this device, with at least one delivery sleeve placed in its undeployed state within the support and the support placed in its undeployed state within the conduit, when the conduit reaches the target position, a proximal push wire is used to push the delivery mechanism, thereby advancing at least one delivery sleeve and support through the conduit via at least one support clip. When at least one delivery sleeve and support are both withdrawn from the conduit, at least one delivery sleeve and support automatically revert to their respective deployed states, thereby disengaging at least one support clip from both the at least one delivery sleeve and support.

[0014] The present invention addresses the aforementioned problems by providing a neurovascular stent device. This neurovascular stent device is configured to selectively place a self-expanding stent at a target location. The stent is constructed from a plurality of independent stent struts woven together, thereby defining a plurality of stent gaps along the length of the stent between the intersecting stent struts; or a frame formed from a laser-cut tube having an outer grid network of a plurality of interconnected stent struts with stent gaps between the struts. The stent is configured to transition between two forms: an elongated and unexpanded form, in which the outer diameter of the stent is smaller than the inner diameter of the catheter; and a relatively larger expanded form, in which the outer diameter and configuration of the stent allow it to effectively fill the target location. In at least one embodiment, a delivery mechanism is configured to be selectively coaxially placed within the stent and detachably engaged with the stent. The delivery mechanism provides a proximal pusher wire, engaged proximally with the delivery mechanism and configured to move the delivery mechanism and the stent through the catheter; a distal pusher wire, located at the relatively distal end of the delivery mechanism and configured to assist in guiding the delivery mechanism and the stent through the catheter; and at least one self-expanding delivery cannula, located between the proximal and distal pusher wires. Each of at least one delivery sleeve is provided with multiple independent sleeve strands braided together, thereby defining multiple sleeve gaps between the intersecting sleeve strands along the length of the delivery sleeve. The delivery sleeve is configured to transition between two configurations: an elongated and undeployed configuration in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that the delivery sleeve is coaxially positioned within the support when the support is in the undeployed configuration; and a relatively larger deployed configuration. A proximal cap is located at the proximal end of the delivery sleeve to maintain the braided arrangement of the sleeve strands, and a distal cap is located at the relatively distal end of the delivery sleeve to maintain the braided arrangement of the sleeve strands. A coupling mechanism is coaxially positioned within the delivery sleeve and provides an elongated coupling shaft and at least one support latch. The elongated coupling shaft engages with the proximal cap and extends a distance toward the distal cap; the at least one support latch is located substantially at the distal end of the coupling shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in the undeployed configuration. At least one support clip has a length less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed states, at least one support clip disengages from the delivery sleeve. When using this device, with at least one delivery sleeve placed in its undeployed state within the support and the support placed in its undeployed state within the conduit, when the conduit reaches the target position, a proximal push wire is used to push the delivery mechanism, thereby advancing at least one delivery sleeve and support through the conduit via at least one support clip. When at least one delivery sleeve and support are both withdrawn from the conduit, at least one delivery sleeve and support automatically revert to their respective deployed states, thereby disengaging at least one support clip from both the at least one delivery sleeve and support.

[0015] Other features and advantages of various aspects of the invention will become apparent from the following more detailed description taken in conjunction with the accompanying drawings, which illustrate by way of example the principles of various aspects of the invention. Attached Figure Description

[0016] The accompanying drawings illustrate various aspects of the invention. In these drawings: Figure 1 and Figure 2 This is a partial side view of an exemplary neurovascular stent delivery device according to at least one embodiment; Figure 3 and Figure 4 This is a partial side view of an exemplary conveying mechanism of a device according to at least one embodiment; Figure 5 This is a partial perspective view of an exemplary engagement mechanism of a conveying mechanism according to at least one embodiment; Figure 6 It is a front view according to at least one embodiment; Figure 7 This is a partial perspective view of a conveying mechanism according to at least one embodiment; Figure 8 This is a partial perspective view of a device according to at least one embodiment; Figure 9 This is a partial top view of a device according to at least one embodiment; Figure 10 and Figure 11 This is a partial side view of another exemplary neurovascular stent delivery device according to at least one embodiment; Figure 12 This is a further partial side view of it according to at least one embodiment, in which the support is omitted for clarity; Figure 13 According to at least one embodiment Figure 10 A further partial side view of the device shown; Figure 14 According to at least one embodiment Figure 10 A perspective view of the device shown; Figure 15 This is a further partial perspective view of an exemplary embodiment of a device according to at least one embodiment; Figure 16 A further partial side view of an exemplary conveying mechanism of a device according to at least one embodiment; and Figure 17 This is a further partial side view of an exemplary conveying mechanism of a device according to at least one embodiment; and Figure 18 This is a partial side view of an exemplary conveying mechanism of an apparatus according to at least one embodiment.

[0017] The accompanying drawings described above illustrate various aspects of the invention in at least one exemplary embodiment, the specific details of which will be further clarified below. According to one or more embodiments, features, elements, and aspects of the invention referenced by the same numbers in different drawings represent the same, equivalent, or similar features, elements, or aspects. Detailed Implementation

[0018] See now Figure 1 and Figure 2 This image shows a partial side view of an exemplary neurovascular stent delivery device 20 according to at least one embodiment, configured to selectively place and reposition a stent 22 within a patient's blood vessel or vascular system to other target areas (hereinafter collectively referred to as "target locations" for simplicity). In at least one embodiment, the stent 22 is constructed from a laser-cut tube forming a plurality of interconnected stent struts 24 that cooperate to form a self-expanding stent 22 having an elongated, non-expanded form capable of insertion into a thin tube such as a guide sheath or a catheter 26 (hereinafter collectively referred to as "catheter" 26 for simplicity), such as Figure 1 As best shown in the figure. In this regard, it should be noted that the conduit 26 shown in the figure is merely illustrative and for purposes of illustration only. In further embodiments, the device 20 may employ any type of conduit 26, whether currently known or developed in the future, as long as it enables the device 20 to substantially perform the functions described herein. In at least one embodiment, the stent 22 defines a plurality of stent gaps 28 along the length of the stent 22 between intersecting stent struts 24. It should first be noted that the term "strut," in its broadest sense, includes wires, fibers, filaments, or other single elongated members.

[0019] In at least one embodiment, the stent 22 is made of a hyperelastic metallic material, allowing it to expand automatically without the application of external force. Therefore, in at least one such embodiment, the stent 22 is configured to switch between two forms: an elongated and unexpanded form, in which the outer diameter of the stent 22 is small enough to be inserted into the catheter 26 (e.g., Figure 1 The best one is shown in the middle); another is a relatively large unfolded form (actually, for example...). Figure 11As shown), the outer diameter and configuration of the stent allow the stent 22 to effectively fill the target location. In other words, the stent 22 has the elasticity to self-recover to its deployed form, so that when the device 20 is used, the stent 22 automatically returns to its deployed form upon withdrawal from the catheter 26. Exemplary deployment forms of the stent 22 include tubular, spiral, vortex, planar spiral, complex spiral, three-dimensional complex shape, spherical, or any other form, whether currently known or to be developed in the future, as long as it can effectively fill the target location and meet the requirements of the device 20 in any particular clinical application. In a further embodiment, the stent 22 may be made of any other material, whether currently known or to be developed in the future, as long as it allows the stent 22 to have the elasticity to self-recover to its deployed form. In at least one alternative embodiment, the stent 22 is configured to be manually convertible between its undeployed and deployed forms by any currently known or to be developed mechanism or technology.

[0020] In at least one embodiment, when the stent 22 is composed of stent struts 24 that are co-formed or otherwise intersecting, the performance of the stent 22 can be selectively adjusted to suit the requirements of the medical procedure to which the device 20 is intended. For example, in at least one embodiment, one or more individual stent struts 24 may be composed of materials different from the other stent struts 24. In at least one such embodiment, at least one stent strut 24 is composed of one or more radiopaque materials (such as tungsten-loaded polymers, platinum, chromium, cobalt, tantalum, nitinol, gold, silver, basic bismuth carbonate, barium sulfate, bismuth oxychloride, bismuth trioxide, stainless steel or alloys thereof, or any other radiopaque material currently known or to be developed in the future), while the remaining stent struts 24 are composed of one or more non-radiopaque materials (such as fibers, plastics, polymers, multilayer composites or other biocompatible materials). In this way, the radiopaque linearity of the stent 22 can be selectively adjusted (by including fewer or more radiopaque stent struts 24) while maintaining the necessary structural integrity to maintain the desired morphology. In at least one further embodiment, one or more individual stent struts 24 may be composed of both radiopaque and non-radiopaque materials. In at least one further embodiment, one or more individual stent struts 24 may be composed of a drawn-fill tube bimaterial or composite bimetallic structure. Those skilled in the art will understand that these materials can be used, provided that other suitable biocompatible materials possess appropriate mechanical properties. It should also be noted that the specific stent strut patterns 24 shown in the figures are merely examples, and their description is intended to illustrate the intended use. In further embodiments, the stent struts 24 may employ any other patterns currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. Similarly, in even further embodiments, when the stent 22 comprises a plurality of stent struts 24 woven together or intersecting each other, the stent struts 24 may employ any woven, knitted, or textile patterns currently known or to be developed in the future (for brevity, the terms “woven” and “woven” as used herein are intended to cover all cases), including but not limited to 1-up-1-down-1, 1-up-2-down-2, 2-up-2-down-2, etc., provided that the device 20 substantially performs the functions described herein. Furthermore, the stent gaps 28 shown in the figures are also merely examples. In a further embodiment, the support gap 28 may take any other size, shape, quantity, specification, or pattern currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. Similarly, the support struts 24 themselves may also take any other size, quantity, or specification currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. For example, in at least one embodiment, one or more support struts 24 may have a circular, planar, square, hexagonal, elliptical, strip-shaped, hollow / tubular, or other shapes in cross-section.Therefore, in a further embodiment, the bracket 22 may be of any other size, shape and / or specification currently known or to be developed in the future, depending on the specific use of the device 20, as long as the bracket 22 can substantially achieve the functions described herein.

[0021] In at least one embodiment, the device 20 provides a delivery mechanism 30 configured to be selectively coaxially positioned within and detachably engaged with the support 22, as discussed further below. In at least one embodiment, the proximal end 32 of the delivery mechanism 30 is provided with or engaged with a proximal push wire 34, which is configured to move the device 20 through the conduit 26. In at least one embodiment, the proximal push wire 34 is a coil or a combination of wire and coil to improve the deliverability of the delivery mechanism 30, thereby improving the accuracy of the support 22 reaching the target position. However, in further embodiments, depending on the specific use of the device 20, the proximal push wire 34 may take any other structure, whether currently known or developed in the future, as long as the device 20 can substantially achieve the functions described herein. In at least one embodiment, the opposite distal end 36 of the delivery mechanism 30 is provided with a distal push wire 38 for assisting in guiding the device 20 through the conduit 26 to the target position. In at least one embodiment, the distal pusher 38 is a coil or a combination of wire and coil to improve the transportability of the conveying mechanism 30, thereby improving the accuracy of the support 22 in reaching the target position. However, in further embodiments, depending on the specific use of the device 20, the distal pusher 38 may take any other structure, whether currently known or developed in the future, as long as the device 20 substantially achieves the functions described herein. In at least one embodiment, the distal pusher 38 terminates at a pusher ball 40 to form a smoother surface geometry and reduce the risk of damage to the target position when using the device 20. In at least one embodiment, one or both of the distal pusher 38 and the pusher ball 40 are composed of one or more radiopaque materials to improve the visibility of the device 20 during use and to facilitate the placement of the device 20 in the intended position relative to the target position.

[0022] In at least one embodiment, such as Figure 3 and Figure 4 As best shown, the delivery mechanism 30 provides at least one self-expanding delivery sleeve 42 located between the proximal pusher wire 34 and the distal pusher wire 38. In at least one embodiment, the at least one delivery sleeve 42 is composed of multiple independent sleeve strands 44, which are braided together or intersected to form a self-expanding tubular structure having an elongated and unexpanded form. When the support 22 is in the unexpanded form, the self-expanding tubular structure can be coaxially placed within the support 22 (e.g., when the support 22 is in the unexpanded form). Figure 1(As best shown in the diagram). In addition, at least one delivery sleeve 42 defines a plurality of sleeve gaps 46 along the length of the delivery sleeve 42 between intersecting sleeve strands 44.

[0023] In at least one embodiment, when at least one delivery cannula 42 is composed of multiple braided cannula strands 44, the characteristics of the at least one delivery cannula 42 can be selectively adjusted according to the requirements of the medical procedure used by the device 20. For example, in at least one embodiment, one or more individual cannula strands 44 may be composed of a material different from the other cannula strands 44. In at least one such embodiment, at least one cannula strand 44 is composed of one or more radiopaque materials, while the remaining cannula strands 44 are composed of one or more non-radiopaque materials. In this way, the radiopaque linearity of at least one delivery cannula 42 can be selectively adjusted (by including fewer or more radiopaque cannula strands 44) while maintaining the necessary structural integrity to maintain the desired shape. In at least one further embodiment, one or more individual cannula strands 44 may be composed of both radiopaque and non-radiopaque materials. In at least one further embodiment, one or more individual cannula strands 44 may be composed of a drawn filler tube bimaterial or a composite bimetallic material. Those skilled in the art will understand that these materials can be used, provided that other suitable biocompatible materials possess appropriate mechanical properties. It should also be noted that the specific braiding patterns shown in the accompanying drawings are merely examples, and their description is intended to illustrate the intended use. In further embodiments, the sheath strands 44 may employ any other braided, knitted, or textile patterns currently known or to be developed in the future (for brevity, the terms “braided” and “woven” as used herein are intended to cover all cases), including but not limited to 1-up-1-down-1, 1-up-2-down-2, 2-up-2-down-2, etc., provided that the device 20 substantially performs the functions described herein. Furthermore, the braiding density and sheath gap 46 shown in the accompanying drawings are also merely examples. In even further embodiments, one or more of at least one delivery sheath 42 may employ any other braiding density, and any sheath gap 46 may have any other size, shape, quantity, specification, or pattern currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. Similarly, the tubing strands 44 themselves can have any other size, quantity, or specification currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. For example, in at least one embodiment, one or more tubing strands 44 can have a circular, planar, square, hexagonal, elliptical, strip-shaped, hollow / tubular, or other shapes in cross-section. Therefore, in further embodiments, at least in part, depending on the specific use of the device 20, one or more of at least one delivery tubing 42 can have any other size, shape, and / or specification currently known or to be developed in the future, provided that at least one delivery tubing 42 substantially performs the functions described herein.

[0024] In at least one embodiment, the proximal end 48 of at least one delivery sleeve 42 is provided with a proximal cap 50 for maintaining the braided arrangement of the sleeve strands 44. Similarly, in at least one embodiment, the opposite distal end 52 of at least one delivery sleeve 42 is provided with a distal cap 54 for maintaining the braided arrangement of the sleeve strands 44. In at least one such embodiment, one or both of the proximal cap 50 and the distal cap 54 are made of one or more radiopaque materials to facilitate positioning at least one delivery sleeve 42 in the desired position relative to a target location. In at least one alternative embodiment, one or both of the proximal end 48 and the distal end 52 of at least one delivery sleeve 42 are simply closed, sealed, or otherwise treated to maintain the braided arrangement of the sleeve strands 44. In at least one embodiment, the proximal cap 50 engages with the proximal pusher 34. In at least one alternative embodiment, the proximal cap 50 and the proximal pusher 34 are the same component. In at least one embodiment, the distal cap 54 engages with the distal pusher 38. In at least one alternative embodiment, the distal cap 54 and the distal pusher 38 are the same component.

[0025] In at least one embodiment, at least one delivery sleeve 42 is composed of a laser-cut tube forming a plurality of interconnected laser-cut sleeve supports 47. The laser-cut sleeve supports 47 intersect each other to form a self-expanding tubular structure. This self-expanding tubular structure has an elongated and unexpanded form. When the support 22 is in the unexpanded form, the self-expanding tubular structure can be coaxially placed within the support 22 (e.g., ...). Figure 18 (As best shown in the diagram). Furthermore, at least one delivery sleeve 42 defines a plurality of sleeve gaps 46 along the length of the delivery sleeve 42 between intersecting laser-cut sleeve supports 47. In a further embodiment, one or more of the at least one delivery sleeve 42 may employ any other laser-cut pattern, and any sleeve gap 46 may have any other size, shape, quantity, specification, or pattern currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. Similarly, the sleeve supports themselves may have any other size, quantity, or specification currently known or to be developed in the future, provided that the device 20 substantially performs the functions described herein. For example, in at least one embodiment, one or more sleeve supports may have a circular, planar, square, hexagonal, elliptical, strip-shaped, hollow / tubular, or other shapes in cross-section. Therefore, in a further embodiment, at least in part, depending on the specific use of the device 20, one or more of the at least one delivery sleeve 42 may have any other size, shape, and / or specification currently known or to be developed in the future, provided that at least one delivery sleeve 42 substantially performs the functions described herein.

[0026] In at least one embodiment, the proximal end 48 of at least one delivery sleeve 42 is provided with a proximal end cap 50. Similarly, in at least one embodiment, the opposite distal end 52 of at least one delivery sleeve 42 is provided with a distal end cap 54. In at least one such embodiment, one or both of the proximal end cap 50 and the distal end cap 54 are made of one or more radiopaque materials to facilitate the placement of at least one delivery sleeve 42 in a desired position relative to a target location. In at least one alternative embodiment, the proximal end cap 50 and the distal end cap 54 are independently selected as part of the laser-cut tube. When the diameter of the laser-cut tube is less than or equal to the inner diameter of the support 22 in its undeployed state, the proximal end cap 50 and / or the distal end cap 54 may be selected as part of the laser-cut tube, or may be provided separately; when the diameter of the laser-cut tube is greater than the inner diameter of the support 22 in its undeployed state, the proximal end cap 50 and / or the distal end cap 54 are preferably provided independently of the laser-cut tube at the proximal and / or distal ends of the delivery sleeve. Especially when a smaller outer diameter is required, such as when the outer diameter is closer to the far end of the device 20, a smaller outer diameter is preferred. In this case, the far end cover 54 can be laser-cut into a hollow shape, and then the outer diameter can be reduced by using the far end cover 54 to converge. For the near end, in order to facilitate processing, the part of the laser-cut tube that has not been hollowed out can be directly used as the near end cover 50.

[0027] In at least one embodiment, the proximal cap 50 engages with the proximal push wire 34. In at least one alternative embodiment, the proximal cap 50 and the proximal push wire 34 are the same component. In at least one embodiment, the distal cap 54 engages with the distal push wire 38. In at least one alternative embodiment, the distal cap 54 and the distal push wire 38 are the same component.

[0028] In at least one embodiment, the conveying mechanism 30 further includes at least one engaging mechanism 56, which engages with the proximal end cap 50 of at least one conveying sleeve 42 and is positioned within the at least one conveying sleeve 42. In at least one embodiment, as Figure 5 and Figure 6 As shown in the best embodiment, at least one engagement mechanism 56 is provided with an elongated engagement shaft 58 that engages with the proximal end cap 50 of the corresponding delivery sleeve 42 and extends a distance toward the distal end cap 54 of the delivery sleeve 42.

[0029] In at least one embodiment, the conveying mechanism 30 further includes at least one engaging mechanism 56, which engages with the distal end cap 54 of at least one conveying sleeve 42 and is positioned within the at least one conveying sleeve 42. In at least one embodiment, as Figure 18 As shown in the best embodiment, at least one engagement mechanism 56 is provided with an elongated engagement shaft 58 that engages with the distal end cap 54 of the corresponding delivery sleeve 42 and extends a distance toward the proximal end cap 50 of the delivery sleeve 42.

[0030] In at least one embodiment, the engagement mechanism 56 is placed inside at least one delivery sleeve 42, and when at least one delivery sleeve 42 is not deployed, the engagement mechanism 56 is coaxially arranged with at least one delivery sleeve 42.

[0031] In at least one embodiment, when at least one engagement mechanism 56 engages only with the distal end cap 54 or proximal end cap 50 of at least one delivery sleeve 42, the engagement mechanism 56 is coaxially arranged with at least one delivery sleeve 42, whether the at least one delivery sleeve 42 is in an undeployed state or an deployed state.

[0032] In at least one embodiment, the engagement shaft 58 is located approximately on the axial centerline of the corresponding delivery sleeve 42. Furthermore, in at least one such embodiment, as... Figure 3 As best shown, the engagement shaft 58 is substantially linearly aligned with the proximal pusher wire 34 and the distal pusher wire 38. In at least one embodiment, the engagement shaft 58 is a coil or a combination of wire and coil to improve the transportability of the conveying mechanism 30, thereby improving the accuracy of the support 22 reaching the target position. However, in further embodiments, at least in part, depending on the specific use of the device 20, the engagement shaft 58 may also take any other structure currently known or to be developed in the future, provided that the device 20 substantially achieves the functions described herein. Furthermore, in further embodiments, the engagement shaft 58 may have any other size, shape, quantity, specification, and / or relative position currently known or to be developed in the future, provided that the device 20 substantially achieves the functions described herein.

[0033] In at least one embodiment, at least one bracket latch 66 is provided on the engagement shaft 58. In at least one embodiment, the at least one bracket latch 66 is typically located at the distal end of the engagement shaft 58 (the end not engaged with the proximal cap 50 or the distal cap 54). In at least one embodiment, at least one bracket latch 66 is further provided at the distal end 60 of the engagement shaft 58, the at least one bracket latch 66 being configured to be detachably engaged with the support 22 when both the at least one delivery sleeve 42 and the support 22 are in an undeployed state. In at least one embodiment, at least one bracket latch 66 is rotatably engaged with the engagement shaft 58, thereby allowing at least one bracket latch 66 to rotate circumferentially about the engagement shaft 58. In at least one alternative embodiment, at least one bracket latch 66 is non-rotatably engaged with the engagement shaft 58. In at least one embodiment, at least one bracket latch 66 is configured as an elongated protrusion extending radially from the engagement shaft 58, and the at least one bracket latch 66 is sized and configured to extend through the sleeve gap 46 of the at least one delivery sleeve 42 and the bracket gap 28 of the bracket 22 when both the at least one delivery sleeve 42 and the bracket 22 are in the undeployed state. Figure 8 and Figure 9As best shown. In at least one embodiment, the engagement shaft 58 is provided with a plurality of bracket latches 66, which are radially spaced and arranged on the circumference of the engagement shaft 58, such that when the bracket latches 66 extend from the bracket gap 28 and the sleeve gap 46, the bracket post 24 adjacent to the corresponding bracket gap 28 and the sleeve post (such as sleeve strand 44 or laser-cut sleeve post 47) adjacent to the corresponding sleeve gap 46 will be engaged between the spaced bracket latches 66. Therefore, in at least one such embodiment, a post groove is defined between each pair of adjacent bracket latches 66, the groove width of which is relatively larger than the diameter of the individual sleeve post (such as sleeve strand 44 or laser-cut sleeve post 47) placed between adjacent bracket latches 66 and the diameter of the individual bracket post 24, thereby allowing the sleeve post (such as sleeve strand 44 or laser-cut sleeve post 47) and the bracket post 24 to be located within the post groove between adjacent bracket latches 66. In at least one such embodiment, a plurality of support clips 66 are provided by a support clip disc 68. It should be noted that the at least one support clip 66 shown in the figures is merely an example, and the figures only illustrate the sleeve strand 44. In further embodiments, the at least one support clip 66 may have any other size, shape, quantity, specification, and / or relative position currently known or developed in the future, provided that the device 20 substantially performs the functions described herein.

[0034] In at least one embodiment, at least one sleeve snap 62 is further provided at the distal end 60 of the engagement shaft 58, the sleeve snap 62 being configured to detachably engage with the delivery sleeve 42 when the delivery sleeve 42 is in an undeployed state. In at least one embodiment, at least one sleeve snap 62 is rotatably engaged with the engagement shaft 58, thereby allowing at least one sleeve snap 62 to rotate circumferentially about the engagement shaft 58. In at least one alternative embodiment, at least one sleeve snap 62 is non-rotatably engaged with the engagement shaft 58. In at least one embodiment, at least one sleeve snap 62 is configured as an elongated protrusion extending radially from the engagement shaft 58, and the at least one sleeve snap 62 is sized and configured to extend through the sleeve gap 46 of the corresponding delivery sleeve 42 when the delivery sleeve 42 is in an undeployed state, such as... Figure 7 and Figure 9 As best shown in the diagram. In at least one embodiment, the engagement shaft 58 is provided with a plurality of sleeve catches 62, which are radially spaced and arranged on the circumference of the engagement shaft 58, such that when the sleeve catches 62 extend from the sleeve gap 46, the sleeve support (such as sleeve strand 44 or laser-cut sleeve support 47) adjacent to the corresponding sleeve gap 46 is engaged between the spaced sleeve catches 62. Therefore, in at least one such embodiment, a linear groove 63 is defined between each pair of adjacent sleeve catches 62 (see... Figure 6The width of the linear groove is relatively larger than the diameter of the individual sleeve posts (such as sleeve strands 44 or laser-cut sleeve posts 47) placed between adjacent sleeve snaps 62, thereby allowing the sleeve posts (such as sleeve strands 44 or laser-cut sleeve posts 47) to be located within the linear groove 63 between adjacent sleeve snaps 62. In at least one such embodiment, a plurality of sleeve snaps 62 are provided by a sleeve snap disc 64. It should be noted that the at least one sleeve snap 62 shown in the figures is merely an example. In further embodiments, at least one sleeve snap 62 may have any other size, shape, quantity, specification and / or relative position currently known or developed in the future, provided that the device 20 substantially performs the functions described herein.

[0035] In at least one embodiment, such as Figure 5 As best shown, at least one bracket latch 66 is axially spaced from at least one sleeve latch 62 on the engagement shaft 58. In at least one such embodiment, as Figure 8 and Figure 9 As best shown, when the stent 22 is in its undeployed state, the proximal end 70 of the stent 22 is located within the space between at least one stent latch 66 and at least one sleeve latch 62. Furthermore, in at least one embodiment, as... Figure 6 As shown in the best embodiment, at least one bracket latch 66 is rotated offset relative to at least one sleeve latch 62 on the engagement shaft 58.

[0036] In at least one embodiment, the length of the engagement shaft 58 of the engagement mechanism 56 of the at least one delivery sleeve 42 is approximately 1 / 3 to 2 / 3 of the length of the delivery sleeve 42, for example, 0.4, 0.5, 0.6, etc., preferably half. In at least one embodiment, the distal end 60 of the engagement shaft 58 terminates approximately midway between the proximal end 48 and the distal end 52 of the respective delivery sleeve 42. In other words, in at least one embodiment, the length of the engagement shaft 58 is approximately half the length of the respective delivery sleeve 42. However, in at least one alternative embodiment, the engagement shaft 58 may be relatively longer or shorter. In such an embodiment, since the engagement shaft 58 engages only with the proximal end 48 of the respective delivery sleeve 42 and not with the distal end 52, at least one sleeve latch 62 and at least one support latch 66 can both float within the respective delivery sleeve 42, while the delivery sleeve 42 can expand and contract independently of at least one sleeve latch 62 and at least one support latch 66. In at least one alternative embodiment, one or more engagement shafts 58 of at least one delivery sleeve 42 may be connected to the distal end 52 of the delivery sleeve 42, rather than the proximal end 48 of the delivery sleeve 42. In at least one embodiment, the distal end 60 of the engagement shaft 58 terminates at a shaft end 72. In at least one such embodiment, as Figure 4As best shown, the shaft end 72 is substantially spherical to create a smoother surface geometry and reduce the risk of damage to at least one delivery sleeve 42 and support 22 when using the device 20. In at least one alternative embodiment, such as Figure 16 and Figure 17 As best shown, the shaft end 72 is bilobed (in at least one such embodiment, formed by bending a wire approximately 180 degrees). In further alternative embodiments, the shaft end 72 may have any other dimensions, shapes, specifications, and / or configurations currently known or developed in the future, provided that the device 20 substantially performs the functions described herein. In at least one embodiment, one or more of the engagement shaft 58, at least one sleeve latch 62, at least one bracket latch 66, and shaft end 72 are made of one or more radiopaque materials to improve the visibility of the device 20 during use and to facilitate the placement of the device 20 in the intended position relative to the target location.

[0037] In at least one embodiment, similar to the support strut 24, at least one delivery sleeve 42's sleeve strut (such as sleeve strand 44 or laser-cut sleeve strut 47) is made of a hyperelastic metallic material, allowing the delivery sleeve 42 to expand automatically without the application of external force. Therefore, in at least one such embodiment, at least one delivery sleeve 42 is configured to switch between two forms: an extended and unexpanded form, in which the outer diameter of at least one delivery sleeve 42 is small enough that when the support 22 is in the unexpanded form, the delivery sleeve 42 is coaxially placed within the support 22 (e.g., ...). Figure 1 The best one is shown in the middle); another is a relatively large unfolded form (its examples are shown in the middle). Figure 3As shown in the diagram, the outer diameter of the sleeve is designed and configured such that the delivery sleeve 42 completely disengages at least one sleeve latch 62 and at least one support latch 66 of the corresponding engagement mechanism 56 from the delivery sleeve 42 and the support 22, as discussed further below. In other words, at least one delivery sleeve 42 has the elasticity to return to its deployed state, such that during use of the device 20, when the delivery sleeve 42 is withdrawn from the conduit 26, the delivery sleeve 42 automatically enters the deployed state, thereby automatically disengaging at least one sleeve latch 62 and at least one support latch 66 of the corresponding engagement mechanism 56 from the delivery sleeve 42 and the support 22. Exemplary deployed states of at least one delivery sleeve 42 include spiral, vortex, planar spiral, complex spiral, three-dimensional complex shape, spherical, or any other known or future-developed shape capable of effectively disengaging at least one sleeve latch 62 and at least one support latch 66 of the corresponding engagement mechanism 56 from the delivery sleeve 42 and the support 22. In a further embodiment, the sleeve support (such as sleeve strand 44 or laser-cut sleeve support 47) may be composed of any other known or future-developed material capable of biasing at least one delivery sleeve 42 toward an deployed configuration. In at least one alternative embodiment, at least one delivery sleeve 42 is configured to be manually convertible between its undeployed and deployed configurations by any currently known or future-developed mechanism or technology.

[0038] In at least one embodiment, the outer diameter of at least one delivery sleeve 42 is smaller than the inner diameter of the support 22, thereby allowing at least one delivery sleeve 42 to be placed within the support 22 in both the undeployed and deployed states. Furthermore, in at least one embodiment, as... Figure 4As shown in the optimal configuration, when at least one delivery sleeve 42 is in the deployed state, the radius of the outer diameter of each delivery sleeve 42 is greater than the length of each sleeve latch 62 and each support latch 66, so that when at least one delivery sleeve 42 changes from its undeployed state to its deployed state, each sleeve latch 62 and each support latch 66 disengages from the at least one delivery sleeve 42 and support 22. Therefore, during use of the device 20, with at least one delivery sleeve 42 and support 22 placed in their respective undeployed states within the conduit 26, when the conduit 26 reaches the target position, the proximal push wire 34 pushes at least one delivery mechanism 30, thereby advancing at least one delivery sleeve 42 and support 22 (through the corresponding sleeve latch 62 and each support latch 66) through the conduit 26. When the distal ends 52, 80 of at least one delivery sleeve 42 and support 22 are withdrawn from the conduit 26, each delivery sleeve 42 and support 22 automatically begins to change to its respective deployed state. When the proximal ends 48 and 70 of at least one delivery sleeve 42 and the stent 22 are both withdrawn from the conduit 26, at least one delivery sleeve 42 and the stent 22 are fully converted to their respective deployed positions, thereby disengaging at least one sleeve latch 62 and the stent latch 66 from at least one delivery sleeve 42 and the stent 22. Then, by pulling the proximal push wire 34, the delivery mechanism 30 can be retracted through the conduit 26 and removed from the stent 22, thereby holding the stent 22 in place relative to the target position. Furthermore, since the radius of the outer diameter of at least one delivery sleeve 42 is greater than the length of at least one sleeve latch 62 and at least one stent latch 66 when it is in the deployed position, at least one delivery sleeve 42 effectively prevents at least one sleeve latch 62 and at least one stent latch 66 from contacting the stent 22, thereby preventing the delivery mechanism 30 from accidentally moving the stent 22 out of position during retraction. In at least one embodiment, when at least one delivery sleeve 42 is in the undeployed position, the length of at least one stent latch 66 is defined as the length of the stent latch end from the axial centerline.

[0039] In at least one implementation, such as Figure 3 As best shown, the conveying mechanism 30 is provided with a single conveying sleeve 42 located between the proximal pusher wire 34 and the distal pusher wire 38. In at least one such embodiment, the proximal cap 50 of the conveying sleeve 42 engages with the proximal pusher wire 34. Furthermore, in at least one such embodiment, the distal cap 54 of the conveying sleeve 42 engages with the distal pusher wire 38. In at least one alternative embodiment, the proximal cap 50 and the proximal pusher wire 34 are the same component. In at least one alternative embodiment, the distal cap 54 and the distal pusher wire 38 are the same component.

[0040] In at least one alternative embodiment, such as Figures 10 to 12As best shown, the conveying mechanism 30 is provided with a plurality of conveying sleeves 42, which are linearly arranged and connected in series along the length of the conveying mechanism 30 between the proximal pusher 34 and the distal pusher 38. In at least one such embodiment, the length and / or diameter of one or more conveying sleeves 42 differs from the length and / or diameter of the other linearly arranged and connected conveying sleeves 42. In at least one alternative embodiment, the linearly arranged and connected conveying sleeves 42 all have substantially the same length and substantially the same diameter. In at least one embodiment, the number of conveying sleeves 42 and the size of each such conveying sleeve 42 depend at least in part on the length of the support 22 and the specific usage environment of the device 20. In at least one such embodiment, the conveying mechanism 30 is provided with a proximal conveying sleeve 74 located at the proximal end 32 of the conveying mechanism 30; and a distal conveying sleeve 76 located at the distal end 36 of the conveying mechanism 30. In at least one such embodiment, the proximal cap 50 of the proximal conveying sleeve 74 engages with the proximal pusher 34. Furthermore, in at least one such embodiment, the distal cap 54 of the distal delivery sleeve 76 engages with the distal push wire 38. In at least one alternative embodiment, the proximal cap 50 of the proximal delivery sleeve 74 and the proximal push wire 34 are the same component. In at least one alternative embodiment, the distal cap 54 of the distal delivery sleeve 76 and the distal push wire 38 are the same component. In at least one further embodiment, the delivery mechanism 30 is provided with at least one intermediate delivery sleeve 78 located between the proximal delivery sleeve 74 and the distal delivery sleeve 76. In at least one embodiment, delivery sleeves 42 are connected in series via proximal caps 50 and distal caps 54. In at least one embodiment, the distal cap 54 of one delivery sleeve 42 is also the proximal cap 50 of an adjacent delivery sleeve 42. In at least one alternative embodiment, the distal cap 54 of one delivery sleeve 42 engages with the proximal cap 50 of an adjacent delivery sleeve 42.

[0041] In at least one embodiment, such as Figure 8 and Figure 9 As shown, when both the proximal delivery sleeve 74 and the stent 22 are in the undeployed state, at least one stent latch 66 on the engagement shaft 58 of the proximal delivery sleeve 74 is configured to detachably engage with the proximal end 70 of the stent 22, so that when at least one delivery mechanism 30 is pulled through the conduit 26 using the proximal pusher 34, at least one stent latch 66 on the engagement shaft 58 of the proximal delivery sleeve 74 can pull the proximal end 70 of the stent 22. Furthermore, in at least one embodiment, as... Figure 13 and Figure 14As shown, when both the distal delivery sleeve 76 and the stent 22 are in their undeployed state, at least one stent latch 66 on the engagement shaft 58 of the distal delivery sleeve 76 is configured to detachably engage with the distal end 80 of the stent 22, so that when at least one delivery mechanism 30 is pushed through the conduit 26 using the proximal pusher 34, at least one stent latch 66 on the engagement shaft 58 of the distal delivery sleeve 76 can push the distal end 80 of the stent 22. Therefore, at least one stent latch 66 on the engagement shaft 58 of the proximal delivery sleeve 74 and the distal delivery sleeve 76 work together to simultaneously push and pull the proximal end 70 and the distal end 80 of the stent 22 through the conduit 26, thereby reducing the frictional force experienced by the stent 22 as it passes through the conduit 26. In at least one embodiment, when at least one delivery sleeve 42 and the support 22 are both in an undeployed state, at least one support latch 66 on the engagement shaft 58 of each of at least one intermediate delivery sleeve 78 is configured to detachably engage with the support 22 at a position between the proximal end 70 and the distal end 80 of the support 22, thereby further reducing the frictional force experienced by the support 22 as it passes through the conduit 26.

[0042] Furthermore, during the use of device 20, when at least one delivery sleeve 42 and support 22 are withdrawn from conduit 26 and begin to automatically transform into their respective deployed forms, at least one sleeve latch 62 and support latch 66 of each deployed delivery sleeve 42 sequentially disengage from delivery sleeve 42 and support 22, while at least one sleeve latch 62 and support latch 66 of each delivery sleeve 42 still within conduit 26 and not deployed remain engaged with the undeployed delivery sleeve 42 and support 22. Therefore, at least one sleeve latch 62 and support latch 66 of each undeployed delivery sleeve 42 within conduit 26 can continue to advance delivery sleeve 42 and support 22 through conduit 26 via proximal push wire 34 until the proximal ends 48 and 70 of at least one delivery sleeve 42 and support 22 are withdrawn from conduit 26. At this point, at least one delivery sleeve 42 and support 22 are completely transformed into their respective unfolded forms, thereby disengaging at least one sleeve latch 62 and support latch 66 from at least one delivery sleeve 42 and support 22.

[0043] In at least one embodiment, such as Figure 15 As shown, one or more engagement shafts 58 are not provided with at least one sleeve latch 62, such that the engagement shaft 58 only has at least one support latch 66. In at least one such embodiment, the at least one support latch 66 is configured to both push and pull the support 22. In at least one such embodiment, the engagement shaft 58 of the proximal delivery sleeve 74 still has at least one sleeve latch 62. Furthermore, in at least one embodiment, one or more intermediate delivery sleeves 42 are not provided with an engagement shaft 58.

[0044] The solutions described in this specification can also be described as the following embodiments: 1. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnecting stent struts along the length of the stent, the stent being configured to transition between two forms: an elongated and unexpanded form in which the outer diameter of the stent is smaller than the inner diameter of the catheter; and a relatively larger expanded form in which the outer diameter and configuration of the stent allow the stent to effectively fill the target location. The device includes: a delivery mechanism configured to be selectively coaxially placed within the stent and detachably engaged with the stent. The delivery mechanism includes: a proximal pusher wire engaged proximally with the delivery mechanism and configured to move each of the delivery mechanism and the stent through the catheter; a distal pusher wire located at the relatively distal end of the delivery mechanism and configured to assist in guiding each of the delivery mechanism and the stent through the catheter; and at least one self-expanding delivery sheath disposed between the proximal and distal pusher wires, each of the at least one delivery sheath comprising: a plurality of independent sheath strands braided together to define a plurality of sheath gaps between the intersecting sheath strands along the length of the delivery sheath, the... The delivery sleeve is configured to transition between an elongated, undeployed form (wherein, when the support is in its undeployed form, the outer diameter of the delivery sleeve is smaller than the inner diameter of the support to allow the delivery sleeve to be coaxially placed within the support) and a relatively larger deployed form; a proximal cap, positioned at the proximal end of the delivery sleeve, for maintaining the braided arrangement of the sleeve strands; a distal cap, positioned at the relatively distal end of the delivery sleeve, for maintaining the braided arrangement of the sleeve strands; and a coupling mechanism, coaxially disposed within the delivery sleeve. The engagement mechanism provides: an elongated engagement shaft that engages with the proximal cap and extends a distance toward the distal cap; and at least one support latch, substantially positioned on the distal end of the engagement shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; when the delivery sleeve is in its deployed state, the length of the at least one support latch is less than the radius of the delivery sleeve, so that the at least one support latch disengages from the delivery sleeve when both the delivery sleeve and the support are in their undeployed state; thus, during use of the device, with the at least one delivery sleeve placed in its undeployed state within the support and the support placed in its undeployed state within the conduit, when the conduit reaches the target location, the proximal pusher pushes the delivery mechanism, which in turn advances the at least one delivery sleeve and the support through the conduit via the at least one support latch, and when each of the at least one delivery sleeve and the support has left the conduit, each of the at least one delivery sleeve and the support automatically transforms into its respective deployed state, thereby causing the at least one support latch to disengage simultaneously from the at least one delivery sleeve and the support.

[0045] 2. The support conveying device according to implementation scheme 1 further includes a support.

[0046] 3. The support conveying device according to embodiments 1 and 2, wherein the support pillar is made of a super-elastic metal material, thereby biasing the support into an unfolded shape.

[0047] 4. The support conveying device according to embodiments 1 to 3, wherein at least one support column of the support is made of at least one non-transparent material.

[0048] 5. The support conveying device according to implementation schemes 1 to 4, wherein the distal wire pusher terminates at the wire pusher ball.

[0049] 6. The support conveying device according to embodiments 1 to 5, wherein one or both of the distal wire pusher and the wire pusher ball are made of one or more radiopaque materials.

[0050] 7. The support conveying device according to embodiments 1 to 6, wherein at least one strand of at least one conveying sleeve is made of at least one non-transparent material.

[0051] 8. The support delivery device according to embodiments 1 to 7, wherein the proximal end cap of at least one delivery sleeve is made of at least one radiopaque material.

[0052] 9. The support conveying device according to embodiments 1 to 8, wherein the distal end cap of at least one conveying sleeve is made of at least one radiopaque material.

[0053] 10. The support conveying device according to embodiments 1 to 9, wherein the proximal end cap of at least one conveying mechanism is engaged with the proximal end push wire.

[0054] 11. The support conveying device according to embodiments 1 to 10, wherein the distal end cover is engaged with the distal end push wire.

[0055] 12. The support conveying device according to embodiments 1 to 11, wherein the engagement shaft of the engagement mechanism of at least one conveying sleeve is substantially located on the axial center line of the conveying sleeve.

[0056] 13. The support delivery device according to embodiments 1 to 12, wherein the engagement shaft of the engagement mechanism of at least one delivery sleeve is substantially linearly aligned with each of the proximal push wire and the distal push wire.

[0057] 14. The support conveying device according to embodiments 1 to 13, wherein at least one support latch is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of at least one conveying sleeve, and the size and configuration of the at least one support latch are adapted to extend simultaneously through the sleeve gap of the conveying sleeve and the substantially linearly aligned support gap of the support when both the conveying sleeve and the support are in their undeployed state.

[0058] 15. The support conveying device according to embodiments 1 to 14, wherein the engagement shaft of the engagement mechanism of at least one conveying sleeve provides a plurality of support clips, which are radially spaced and arranged circumferentially around the engagement shaft.

[0059] 16. The bracket conveying device according to embodiments 1 to 15, wherein multiple bracket clips are provided by bracket clip discs.

[0060] 17. The support conveying device according to embodiments 1 to 16, wherein the engagement mechanism of at least one conveying sleeve further provides at least one sleeve snap, which is substantially disposed on the distal end of the engagement shaft and configured to detachably engage with the conveying sleeve when the conveying sleeve is in its undeployed state; when the conveying sleeve is in its deployed state, the length of at least one sleeve snap is less than the radius of the conveying sleeve, so that at least one sleeve snap disengages from the conveying sleeve when the conveying sleeve is in its deployed state.

[0061] 18. The support conveying device according to embodiments 1 to 17, wherein at least one sleeve snap is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of at least one conveying sleeve, and the size and configuration of the at least one sleeve snap are adapted to extend through the sleeve gap of the conveying sleeve when the conveying sleeve is in its undeployed state.

[0062] 19. The support conveying device according to embodiments 1 to 18, wherein the engagement shaft of at least one conveying sleeve engagement mechanism provides a plurality of sleeve snaps, which are radially spaced and arranged circumferentially around the engagement shaft.

[0063] 20. The support conveying device according to embodiments 1 to 19, wherein multiple sleeve clips are provided by sleeve clip discs.

[0064] 21. The support conveying device according to embodiments 1 to 20, wherein at least one support buckle is axially spaced from at least one sleeve buckle on the connecting shaft.

[0065] 22. The support conveying device according to embodiments 1 to 21, wherein when the support is in its undeployed state, the proximal end of the support is placed between at least one support clip and at least one sleeve clip.

[0066] 23. The support conveying device according to embodiments 1 to 22, wherein at least one support latch is rotated off from at least one sleeve latch on the engagement shaft.

[0067] 24. The support conveying device according to embodiments 1 to 23, wherein the length of the engagement shaft of the engagement mechanism of at least one conveying sleeve is approximately half the length of the conveying sleeve.

[0068] 25. The support conveying device according to embodiments 1 to 24, wherein the distal end of the engagement shaft of at least one engagement mechanism of the conveying sleeve terminates at the shaft end.

[0069] 26. The support conveying device according to embodiments 1 to 25, wherein one or more of the engagement shaft, at least one sleeve snap, at least one support snap, and shaft end are made of one or more radiopaque materials.

[0070] 27. The support conveying device according to embodiments 1 to 26, wherein the conveying mechanism provides a plurality of conveying sleeves, which are linearly arranged and interconnected in series along the length of the conveying mechanism between the proximal pusher and the distal pusher.

[0071] 28. The support conveying device according to embodiments 1 to 27, wherein the conveying mechanism provides: a proximal conveying sleeve placed at the proximal end of the conveying mechanism; and a distal conveying sleeve placed at the distal end of the conveying mechanism.

[0072] 29. The support delivery device according to embodiments 1 to 28, wherein: the proximal end cap of the proximal delivery sleeve is engaged with the proximal push wire; and the distal end cap of the distal delivery sleeve is engaged with the distal push wire.

[0073] 30. The support conveying device according to embodiments 1 to 29, wherein the conveying mechanism provides at least one intermediate conveying sleeve, which is placed between the proximal conveying sleeve and the distal conveying sleeve.

[0074] 31. The support conveying device according to embodiments 1 to 30, wherein the conveying sleeve is interconnected in series via a proximal end cap and a distal end cap.

[0075] 32. The stent delivery device according to embodiments 1 to 31, wherein: at least one stent latch of the connecting shaft of the proximal delivery sleeve is configured to be detachably engaged with the proximal end of the stent when both the proximal delivery sleeve and the stent are in their undeployed state; and at least one stent latch of the connecting shaft of the distal delivery sleeve is configured to be detachably engaged with the distal end of the stent when both the distal delivery sleeve and the stent are in their undeployed state.

[0076] 33. The bracket conveying device according to embodiments 1 to 32, wherein at least one bracket snap is rotatably engaged with the engagement shaft.

[0077] 34. The support conveying device according to embodiments 1 to 33, wherein at least one sleeve snap is rotatably engaged with the engagement shaft.

[0078] 35. The support conveying device according to embodiments 1 to 34, wherein each pair of adjacent sleeve clips defines a strand groove between them, the groove width of the strand groove being relatively larger than the strand diameter of the individual sleeve strands of the conveying sleeve, so that when the sleeve clip extends through the sleeve gap of the conveying sleeve while the conveying sleeve is in its undeployed state, the sleeve strands adjacent to the corresponding sleeve gap are located in the strand groove between the adjacent sleeve clips.

[0079] 36. The support conveying device according to embodiments 1 to 35, wherein the sleeve length or sleeve diameter of one or more of the conveying sleeves is different from the sleeve length or sleeve diameter of other linearly arranged and interconnected conveying sleeves.

[0080] 37. The support conveying device according to embodiments 1 to 36, wherein each of the linearly arranged and interconnected conveying sleeves has substantially the same sleeve length and substantially the same sleeve diameter.

[0081] 38. A stent delivery device comprising: a self-expanding stent including a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent being configured to transition between an elongated, unexpanded form (where the stent's outer diameter is small enough to allow insertion into a catheter) and a relatively large expanded form (where the size and configuration of the stent's outer diameter allow the stent to effectively fill a target site); and a delivery mechanism configured to be selectively coaxially placed within the stent and removably engaged with the stent, the delivery mechanism including: a proximal pusher wire engaged proximally with the delivery mechanism and configured to move each of the delivery mechanism and the stent through the catheter; and distal... A proximal pusher wire, placed at a relatively distal end of the delivery mechanism and configured to assist in guiding each of the delivery mechanism and the stent through the conduit; and at least one self-expanding delivery sleeve, placed between the proximal and distal pusher wires, each of the at least one delivery sleeve comprising: a plurality of independent sleeve strands, braided together to define a plurality of sleeve gaps between the intersecting sleeve strands along the length of the delivery sleeve, the delivery sleeve being configured to move between an elongated, unexpanded form (wherein, when the stent is in its unexpanded form, the outer diameter of the delivery sleeve is smaller than the inner diameter of the stent to allow the delivery sleeve to be coaxially placed within the stent) and a relatively larger expanded form; a proximal cap, placed at the... The delivery sleeve includes a proximal end for maintaining the braided arrangement of the sleeve strands; a distal end cap, positioned at the opposite distal end of the delivery sleeve, for maintaining the braided arrangement of the sleeve strands; and a coupling mechanism coaxially disposed within the delivery sleeve, the coupling mechanism providing: an elongated coupling shaft engaging with the proximal end cap and extending a distance toward the distal end cap; and at least one support latch, substantially positioned on the distal end of the coupling shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; when the delivery sleeve is in its deployed state, the length of at least one support latch is less than the radius of the delivery sleeve, so that when both the delivery sleeve and the support are in their deployed state... When in its deployed state, at least one support clip disengages from the delivery sleeve; thus, during the use of the device, when the at least one delivery sleeve is placed in the undeployed state within the support and the support is placed in the undeployed state within the conduit, when the conduit reaches the target location, the proximal push wire is used to push the delivery mechanism, which in turn advances at least one delivery sleeve and support through the conduit via at least one support clip, and when each of the at least one delivery sleeve and support leaves the conduit, each of the at least one delivery sleeve and support automatically transforms into its respective deployed state, thereby causing at least one support clip to disengage simultaneously from at least one delivery sleeve and support.

[0082] 39. A stent delivery device configured to selectively place a self-expanding stent relative to a target site, wherein the stent includes a plurality of intersecting stent struts defining a plurality of stent gaps between interconnecting stent struts along the length of the stent, the stent being configured to transition between an elongated, unexpanded configuration (where the outer diameter of the stent is smaller than the inner diameter of the catheter) and a relatively large expanded configuration (where the size and configuration of the stent outer diameter allow the stent to effectively fill the target site), the device comprising: a delivery mechanism configured to be selectively coaxially placed within the stent and removably engaged with the stent, the delivery mechanism including: a proximal pusher wire engaged proximally with the delivery mechanism and configured to cause the delivery mechanism and the stent to... Each of the following components moves through the catheter: a distal pusher wire, placed at the relatively distal end of the delivery mechanism and configured to assist in guiding the delivery mechanism and each of the stents through the catheter; and multiple self-expanding delivery cannulas, linearly arranged and interconnected in series along the length of the delivery mechanism between the proximal and distal pusher wires, each delivery cannulas comprising: multiple independent cannula strands braided together to define multiple cannula gaps between the intersecting cannula strands along the length of the delivery cannulas, the delivery cannulas being configured in an extended, unexpanded form (wherein, when the stent is in its unexpanded form, the outer diameter of the delivery cannulas is smaller than the inner diameter of the stent to allow the delivery cannulas to be coaxially placed within the stent) and a relatively larger... The system includes: a transition between its unfolded and unfolded states; a proximal end cap, positioned at the proximal end of the delivery sleeve, for maintaining the braided arrangement of the sleeve strands; a distal end cap, positioned at the relatively distal end of the delivery sleeve, for maintaining the braided arrangement of the sleeve strands; and a coupling mechanism, coaxially disposed within the delivery sleeve, which provides: an elongated coupling shaft, engaging with the proximal end cap and extending a distance toward the distal end cap; and at least one support latch, substantially positioned at the distal end of the coupling shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in their unfolded states; when the delivery sleeve is in its unfolded state, the length of at least one support latch is less than half the length of the delivery sleeve. The device is configured such that at least one support clip disengages from the delivery sleeve when both the delivery sleeve and the support are in their undeployed state. Thus, during use, the delivery sleeve is placed inside the support, and the support is placed inside the conduit, with both the delivery sleeve and the support in their respective undeployed states. When the conduit reaches the target location, a proximal pusher is used to push the delivery mechanism, which in turn advances the delivery sleeve and the support through the conduit via at least one support clip. Furthermore, when each of the delivery sleeve and the support leaves the conduit, each of the delivery sleeve and the support automatically transforms into its respective deployed state, thereby causing at least one support clip to disengage simultaneously from the corresponding delivery sleeve and support.

[0083] The solutions described in this specification can also be described in the following embodiments: 1. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent configured to transition between two configurations: an elongated and unexpanded configuration in which the outer diameter of the stent is smaller than the inner diameter of the conduit; and a relatively large expanded configuration in which the outer diameter and configuration of the stent effectively fill the target location; the device comprising: A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and At least one self-expanding delivery sleeve is located between the proximal pusher and the distal pusher, each of the at least one delivery sleeve comprising: Multiple intersecting sleeve supports define multiple sleeve gaps between the interconnected sleeve supports along the length of the delivery sleeve. The delivery sleeve is configured to switch between two forms: an elongated and unextended form in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that the delivery sleeve is coaxially placed within the support when the support is in the unextended form; and a relatively large extended form. Proximal end cap, located at the proximal end of the delivery sleeve; A distal cap, located at the relatively distal end of the delivery sleeve; and A coupling mechanism, placed within the delivery sleeve, provides: An elongated engagement shaft engages with the proximal and / or distal end of a delivery sleeve and has an axially extending length within the delivery sleeve; and At least one bracket snap is located on the engagement shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the end of the at least one bracket snap from the axial centerline is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket snap disengages from the delivery sleeve.

[0084] 2. According to the support conveying device described in Implementation Scheme 1, the conveying sleeve is woven from multiple strands of wire, and the intersecting strands form multiple interconnected sleeve supports; or, the conveying sleeve is made of a laser-cut tube, and the laser-cut tube is cut to form multiple interconnected sleeve supports.

[0085] 3. In the support conveying device according to implementation scheme 1, when the conveying sleeve is composed of a laser-cut tube, the proximal end cap and the distal end cap are each independently a part of the laser-cut tube.

[0086] 4. The support conveying device according to embodiment 1 further includes the support.

[0087] 5. According to the bracket conveying device of embodiment 1, the engaging shaft engages with the proximal end cover and extends a distance toward the distal end cover, or the engaging shaft engages with the distal end cover and extends a distance toward the proximal end cover.

[0088] 6. The support conveying device according to embodiment 1, wherein the proximal end cap of the at least one conveying mechanism is engaged with the proximal end push wire.

[0089] 7. In the bracket conveying device according to implementation scheme 1, the distal end cover is engaged with the distal end push wire.

[0090] 8. The support conveying device according to embodiment 1, wherein the at least one support buckle is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of the at least one conveying sleeve, and the size and configuration of the at least one support buckle are such that when both the conveying sleeve and the support are in an undeployed state, the at least one support buckle extends through the sleeve gap of the conveying sleeve and the support gap of the support.

[0091] 9. According to the support conveying device described in Implementation Scheme 1, the support gaps of the supports are arranged in a roughly straight line.

[0092] 10. In the bracket conveying device according to embodiment 1, the engagement shaft of the engagement mechanism of the at least one conveying sleeve is provided with a plurality of radially spaced bracket snaps arranged circumferentially along the engagement shaft.

[0093] 11. In the support conveying device according to embodiment 1 or 10, the engagement mechanism of the at least one conveying sleeve further provides at least one sleeve snap, substantially located at the distal end of the engagement shaft, and configured to detachably engage with the conveying sleeve when the conveying sleeve is in an undeployed state, wherein the length of the end of the at least one sleeve snap from the axial centerline is less than the radius of the conveying sleeve in the deployed state, such that when the conveying sleeve is in the deployed state, the at least one sleeve snap disengages from the conveying sleeve.

[0094] 12. The support conveying device according to embodiment 11, wherein the at least one sleeve snap is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of the at least one conveying sleeve, and the size and configuration of the at least one sleeve snap are such that it extends through the sleeve gap of the conveying sleeve when the conveying sleeve is in its undeployed state.

[0095] 13. In the support conveying device according to embodiment 11, the engagement shaft of the engagement mechanism of the at least one conveying sleeve is provided with a plurality of radially spaced sleeve snaps arranged circumferentially along the engagement shaft.

[0096] 14. According to the support conveying device of embodiment 11, the at least one support buckle is longitudinally spaced from the at least one sleeve buckle on the connecting shaft, such that when the support is in the undeployed state, the proximal end of the support is located between the at least one support buckle and the at least one sleeve buckle.

[0097] 15. According to the bracket conveying device of embodiment 11, the at least one bracket latch is rotated and offset relative to at least one sleeve latch on the coupling shaft.

[0098] 16. The support conveying device according to embodiment 1, wherein the length of the engagement shaft of the engagement mechanism of the at least one conveying sleeve is approximately 1 / 3 to 2 / 3 of the length of the conveying sleeve.

[0099] 17. The support conveying device according to embodiment 1, wherein the length of the engagement shaft of the engagement mechanism of the at least one conveying sleeve is approximately half the length of the conveying sleeve.

[0100] 18. The support conveying device according to embodiment 1, wherein the conveying mechanism provides a plurality of conveying sleeves, the conveying sleeves being linearly arranged and connected in series between the proximal push wire and the distal push wire along the length of the conveying mechanism.

[0101] 19. The support conveying device according to embodiment 1, wherein the conveying mechanism provides: A proximal delivery sleeve, located at the proximal end of the delivery mechanism; and The remote delivery sleeve is located at the far end of the delivery mechanism.

[0102] 20. The support conveying device according to embodiment 1, wherein the conveying sleeve is connected in series via the proximal end cap and the distal end cap.

[0103] 21. The stent delivery device according to embodiment 20, wherein the delivery mechanism provides at least one intermediate delivery sleeve located between the proximal delivery sleeve and the distal delivery sleeve.

[0104] 22. The stent delivery device according to embodiment 20, wherein the proximal end cap of the proximal delivery sleeve engages with the proximal end push wire; and The distal cap of the distal delivery sleeve is engaged with the distal push wire.

[0105] 23. The stent delivery device according to embodiment 20, wherein at least one stent latch on the engagement shaft of the proximal delivery sleeve is configured to detachably engage with the proximal end of the stent when both the proximal delivery sleeve and the stent are in an undeployed state; and at least one stent latch on the engagement shaft of the distal delivery sleeve is configured to detachably engage with the distal end of the stent when both the distal delivery sleeve and the stent are in an undeployed state.

[0106] 24. A support conveying device, comprising: A self-expanding stent includes a plurality of intersecting stent struts that define a plurality of stent gaps between the interconnected stent struts along the length of the stent. The stent is configured to transition between two configurations: an elongated, non-expanded configuration in which the outer diameter of the stent is small enough to be inserted into a catheter; and a relatively larger expanded configuration in which the outer diameter and configuration of the stent allow it to effectively fill a target location. A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and At least one self-expanding delivery sleeve is located between the proximal pusher and the distal pusher, each of the at least one delivery sleeve comprising: Multiple intersecting sleeve supports, the delivery sleeve supports defining multiple sleeve gaps between the interconnected sleeve supports along the length of the sleeve, the delivery sleeve being configured to switch between two forms: one is an elongated and undeployed form, in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that when the support is in the undeployed form, the delivery sleeve is coaxially placed within the support; the other is a relatively large deployed form. Proximal end cap, located at the proximal end of the delivery sleeve; A distal cap, located at the relatively distal end of the delivery sleeve; and A coupling mechanism, placed within the delivery sleeve, provides: An elongated coupling shaft having an axially extending length within the delivery sleeve; and At least one bracket snap is located approximately at the distal end of the engagement shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the end of the at least one bracket snap from the axial centerline is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket snap disengages from the delivery sleeve.

[0107] 25. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent configured to transition between two configurations: an elongated and unexpanded configuration in which the outer diameter of the stent is smaller than the inner diameter of the conduit; and a relatively large expanded configuration in which the outer diameter and configuration of the stent effectively fill the target location; the device comprising: A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and Multiple self-expanding delivery sleeves are linearly arranged and connected in series along the length of the delivery mechanism between the proximal pusher wire and the distal pusher wire, each of the delivery sleeves comprising: Multiple intersecting sleeve supports, the delivery sleeve supports defining multiple sleeve gaps between the interconnected sleeve supports along the length of the sleeve, the delivery sleeve being configured to switch between two forms: one is an elongated and undeployed form, in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that when the support is in the undeployed form, the delivery sleeve is coaxially placed within the support; the other is a relatively large deployed form. Proximal end cap, located at the proximal end of the delivery sleeve; A distal cap, located at the relatively distal end of the delivery sleeve; and A coupling mechanism, placed within the delivery sleeve, provides: An elongated coupling shaft having an axially extending length within the delivery sleeve; and At least one bracket snap is located approximately at the distal end of the engagement shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the end of the at least one bracket snap from the axial centerline is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket snap disengages from the delivery sleeve.

[0108] Finally, regarding the exemplary embodiments of the invention as shown and described herein, it should be recognized that a neurovascular stent delivery device is disclosed, configured to selectively place and reposition a stent at a desired location relative to a target site. Because the principles of the invention can be practiced in many configurations other than those shown and described, it should be understood that the invention is not limited in any way to the exemplary embodiments, but is generally directed toward neurovascular stent delivery devices and can be implemented in various forms without departing from the spirit and scope of the invention. Those skilled in the art should also recognize that the invention is not limited to the specific geometries and configuration materials disclosed, but can be substituted with other functionally equivalent structures or materials currently known or to be developed in the future without departing from the spirit and scope of the invention.

[0109] This document describes certain embodiments of the invention, including the best mode known to the inventors for carrying out the invention. Of course, modifications to these embodiments will become apparent to those skilled in the art upon reading the above description. The inventors expect those skilled in the art to employ such modifications as appropriate, and the inventors intend to practice the invention in ways different from those specifically described herein. Therefore, the invention includes all modifications and equivalents of the subject matter set forth in the appended claims as permitted by applicable law. Moreover, unless otherwise stated herein or in obvious contradiction to the context, the invention covers any combination of the above embodiments in all possible modifications.

[0110] The grouping of alternative embodiments, elements, or steps of the invention should not be construed as limiting. Each member of a group may be referenced and claimed individually or in any combination with other members of the groups disclosed herein. It is foreseeable that, for convenience and / or patentability, one or more members of a group may be included in or removed from that group. When any such inclusion or deletion occurs, this specification is deemed to contain the group thus modified to achieve the written description of all Markush groups as used in the appended claims.

[0111] Unless otherwise stated, all figures used in this specification and claims to represent features, items, quantities, parameters, characteristics, terms, etc., should be understood to be modified in all cases by the terms "about" and "approximately." As used herein, the terms "about" and "approximately" mean that the feature, item, quantity, parameter, characteristic, or term so defined covers a range above and below said feature, item, quantity, parameter, characteristic, or term by plus or minus 10%. Therefore, unless stated to the contrary, the numerical parameters set forth in this specification and the appended claims are approximate values ​​that can be converted. At least, each numerical indication should be interpreted based on the reported significant figures and by applying ordinary rounding techniques, rather than attempting to limit the application of the doctrine of equivalence to the scope of the claims. Although the numerical ranges and values ​​illustrating the broad scope of the invention are approximate, the numerical ranges and values ​​presented in specific examples should be reported as precisely as possible. However, any numerical range or value itself contains a certain degree of error, which inevitably arises from the standard deviation occurring in their respective test measurements. The enumeration of numerical ranges of values ​​herein is intended only as a concise method of referring to each individual value falling within that range. Unless otherwise stated herein, each individual value in the numerical range is included in this specification as if it were listed separately herein. Similarly, as used herein, unless otherwise stated, the term "substantially" is a degree term intended to describe an approximate value of such defined feature, item, quantity, parameter, characteristic, or term that covers a range that can be understood and interpreted by one of ordinary skill in the art, or at least covers a range of plus or minus 10% above and below the value of said feature, item, quantity, parameter, characteristic, or term.

[0112] The terms "may" or "can" used with respect to an embodiment or aspect thereof also carry the alternative meaning of "cannot" or "cannot". Therefore, if this specification discloses an embodiment or aspect thereof that can or can be included as part of the subject matter of this invention, it also explicitly implies a negative limitation or exclusionary condition, meaning that an embodiment or aspect thereof cannot or may not be included as part of the subject matter of this invention. Similarly, the term "optionally" used with respect to an embodiment or aspect thereof indicates that the embodiment or aspect thereof may or may not be included as part of the subject matter of this invention. Whether such a negative limitation or exclusionary condition applies will depend on whether it is set forth in the claimed subject matter.

[0113] The terms “a,” “the,” and similar references used in the context of describing this invention (especially in the context of the appended claims) should be interpreted to cover both singular and plural forms, unless otherwise stated herein or in obvious contradiction in the context. Furthermore, sequence indicators used for identified elements (e.g., “first,” “second,” “third,” etc.) are used to distinguish elements and not to indicate or imply a required or limited quantity of these elements, nor to indicate the placement or order of these elements, unless specifically stated otherwise. All methods described herein can be performed in any suitable order unless otherwise stated herein or in obvious contradiction in the context. Unless otherwise required, the use of any and all instances or exemplary language (e.g., “for example”) provided herein is merely for the purpose of better illustrating the invention and is not intended to limit the scope of the invention. No language in this specification should be construed as indicating that any unclaimed element is necessary for the practice of this invention.

[0114] When used in the claims, whether filed or added according to amendments, the open transitional term "comprising" (and its equivalent open transitional phrases, such as "comprising," "containing," and "having") covers all individually or in combination with expressly enumerated elements, limitations, steps, and / or features of unrepresented subject matter; named elements, limitations, and / or features are necessary, but additional unnamed elements, limitations, and / or features may be added, and these unnamed elements, limitations, and / or features still form a configuration within the scope of the claims. The closed transitional phrases "consisting of" or "substantially consisting of" may be used in the claims in place of "comprising" or as a modification of "comprising" to further define the specific embodiments disclosed herein. When used in the claims, whether filed or added according to amendments, the closed transitional phrase "consisting of" does not include any elements, limitations, steps, or features not expressly enumerated in the claims. The closed transition phrase "consistently composed of..." limits the scope of the claims to the expressly listed elements, limitations, steps, and / or features, as well as any other elements, limitations, steps, and / or features that do not substantially affect one or more fundamental and novel features of the claimed subject matter. Therefore, the open transition phrase "comprising" is defined to cover all specifically listed elements, limitations, steps, and / or features, as well as any optional unspecified elements. The closed transition phrase "consisting of..." is defined to include only those elements, limitations, steps, and / or features specifically listed in the claims, while the closed transition phrase "consistently composed of..." is defined to include only those elements, limitations, steps, and / or features specifically listed in the claims and those elements, limitations, steps, and / or features that do not substantially affect one or more fundamental and novel features of the claimed subject matter. Therefore, as a limitation, the open transition phrase "comprising" (and its equivalents) includes, within its meaning, the claimed subject matter specified by the closed transition phrase "consisting of..." or "consistently composed of...". Therefore, for the phrases “consistently composed of” and “comprises of”, the implementation schemes described, implemented and supported herein or claimed by the phrase “comprising” are explicitly or substantially described herein.

[0115] Any claim intended to be explored under 35 U.S.C. 112(f) shall begin with the phrase “means / methods for…”, but the use of the term “for” in any other context is not intended to invoke exploration under 35 U.S.C. 112(f). Therefore, the applicant reserves the right to pursue additional claims in this application or a continuing application after the filing of this application.

[0116] It should be understood that any methods disclosed herein and the order in which the elements of any such method are performed are merely exemplary. Depending on the implementation, they may be performed in any order or in parallel, unless otherwise stated in this invention.

[0117] All patents, patent publications, and other publications referenced and identified in this specification are individually and expressly incorporated herein by reference for describing and disclosing, for example, the compositions and methods described in such publications that can be used in conjunction with the present invention. These publications are provided solely for the purpose of disclosing them prior to the filing date of this application. Nothing in this regard should be construed as an admission that the inventor was not entitled to such prior disclosure due to prior invention or any other reason. All statements regarding dates or the contents of these documents are based on information available to the applicant and do not constitute any admission of the accuracy of the dates or contents of these documents.

[0118] Although various aspects of the invention have been described in conjunction with at least one exemplary embodiment, it will be clearly understood by those skilled in the art that the invention is not limited thereto. Rather, the scope of the invention should be interpreted only in conjunction with the appended claims, and it is explicitly stated here that the inventors believe the claimed subject matter is the present invention.

Claims

1. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent configured to transition between two configurations: an elongated and unexpanded configuration in which the outer diameter of the stent is smaller than the inner diameter of the conduit; and a relatively large expanded configuration in which the outer diameter and configuration of the stent effectively fill the target location; the device comprising: A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and At least one self-expanding delivery sleeve is located between the proximal pusher and the distal pusher, each of the at least one delivery sleeve comprising: Multiple intersecting sleeve supports define multiple sleeve gaps between the interconnected sleeve supports along the length of the delivery sleeve. The delivery sleeve is configured to switch between two forms: an elongated and unextended form in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that the delivery sleeve is coaxially placed within the support when the support is in the unextended form; and a relatively large extended form. Proximal end cap, located at the proximal end of the delivery sleeve; A distal cap, located at the relatively distal end of the delivery sleeve; and A coupling mechanism, placed within the delivery sleeve, provides: An elongated engagement shaft engages with the proximal and / or distal end of a delivery sleeve and has an axially extending length within the delivery sleeve; and At least one bracket snap is located on the engagement shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the end of the at least one bracket snap from the axial centerline is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket snap disengages from the delivery sleeve.

2. The support conveying device according to claim 1, wherein the conveying sleeve is woven from multiple strands of wire, and the intersecting strands form multiple interconnected sleeve supports; or, the conveying sleeve is made of a laser-cut tube, and the laser-cut tube is cut to form multiple interconnected sleeve supports. Preferably, when the delivery sleeve is composed of a laser-cut tube, the proximal end cap and the distal end cap are each independently a part of the laser-cut tube.

3. The support conveying device according to claim 1, further comprising the support.

4. The bracket conveying device according to claim 1, wherein the engaging shaft engages with the proximal end cap and extends a distance toward the distal end cap, or the engaging shaft engages with the distal end cap and extends a distance toward the proximal end cap.

5. The support conveying device according to claim 1, wherein, The proximal end cap of the at least one conveying mechanism is engaged with the proximal end push wire; Preferably, the distal cap is engaged with the distal push wire.

6. The support conveying device according to claim 1, wherein the at least one support latch is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of the at least one conveying sleeve, and the at least one support latch is sized and configured to extend through the sleeve gap of the conveying sleeve and the support gap of the support when both the conveying sleeve and the support are in the undeployed state. Preferably, the gaps between the supports are arranged in a roughly straight line; Preferably, the engagement shaft of the engagement mechanism of the at least one delivery sleeve is provided with a plurality of radially spaced bracket snaps arranged circumferentially along the engagement shaft.

7. The support conveying device according to claim 1 or 6, wherein the engagement mechanism of the at least one conveying sleeve further provides at least one sleeve snap, substantially located at the distal end of the engagement shaft, and configured to detachably engage with the conveying sleeve when the conveying sleeve is in an undeployed state, wherein the length of the end of the at least one sleeve snap from the axial centerline is less than the radius of the conveying sleeve in the deployed state, such that when the conveying sleeve is in the deployed state, the at least one sleeve snap disengages from the conveying sleeve; Preferably, the at least one sleeve snap is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of the at least one delivery sleeve, and the size and configuration of the at least one sleeve snap are such that it extends through the sleeve gap of the delivery sleeve when the delivery sleeve is in its undeployed state. Preferably, the engagement shaft of the engagement mechanism of the at least one delivery sleeve is provided with a plurality of radially spaced sleeve snaps arranged circumferentially along the engagement shaft.

8. The support conveying device according to claim 7, wherein the at least one support latch is longitudinally spaced from the at least one sleeve latch on the connecting shaft, such that when the support is in an undeployed state, the proximal end of the support is located between the at least one support latch and the at least one sleeve latch. Preferably, the at least one bracket latch is rotated relative to at least one sleeve latch on the engagement shaft.

9. The support conveying device according to claim 1, wherein, The length of the engagement shaft of the engagement mechanism of the at least one delivery sleeve is approximately 1 / 3 to 2 / 3 of the length of the delivery sleeve, preferably half.

10. The support conveying device according to claim 1, wherein, The conveying mechanism provides multiple conveying sleeves, which are linearly arranged and connected in series between the proximal pusher wire and the distal pusher wire along the length of the conveying mechanism. Preferably, the conveying mechanism provides: A proximal delivery sleeve, located at the proximal end of the delivery mechanism; and The distal delivery sleeve is located at the distal end of the delivery mechanism; The delivery sleeve is preferably connected in series via the proximal end cap and the distal end cap; More preferably, the conveying mechanism provides at least one intermediate conveying sleeve located between the proximal conveying sleeve and the distal conveying sleeve; Wherein, the proximal cap of the proximal delivery sleeve is preferably engaged with the proximal push wire; and The distal end cap of the distal delivery sleeve is preferably engaged with the distal push wire; Preferably, at least one bracket snap on the engagement shaft of the proximal delivery sleeve is configured to detachably engage with the proximal end of the bracket when both the proximal delivery sleeve and the bracket are in an undeployed state; and at least one bracket snap on the engagement shaft of the distal delivery sleeve is configured to detachably engage with the distal end of the bracket when both the distal delivery sleeve and the bracket are in an undeployed state.

11. A support conveying device, comprising: A self-expanding stent includes a plurality of intersecting stent struts that define a plurality of stent gaps between the interconnected stent struts along the length of the stent. The stent is configured to switch between two forms: an elongated and unexpanded form in which the outer diameter of the stent is small enough to be inserted into a catheter; and a relatively large expanded form in which the outer diameter and configuration of the stent allow the stent to effectively fill a target location. as well as A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and At least one self-expanding delivery sleeve is located between the proximal pusher and the distal pusher, each of the at least one delivery sleeve comprising: Multiple intersecting sleeve supports, the delivery sleeve supports defining multiple sleeve gaps between the interconnected sleeve supports along the length of the sleeve, the delivery sleeve being configured to switch between two forms: one is an elongated and undeployed form, in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that when the support is in the undeployed form, the delivery sleeve is coaxially placed within the support; the other is a relatively large deployed form. Proximal end cap, located at the proximal end of the delivery sleeve; A distal cap, located at the relatively distal end of the delivery sleeve; and A coupling mechanism, placed within the delivery sleeve, provides: An elongated coupling shaft having an axially extending length within the delivery sleeve; and At least one bracket snap is located approximately at the distal end of the engagement shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the end of the at least one bracket snap from the axial centerline is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket snap disengages from the delivery sleeve.

12. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent being configured to transition between two forms: an extended and unexpanded form in which the outer diameter of the stent is smaller than the inner diameter of the conduit; Another type is a relatively large unfolded configuration, in which the outer diameter and configuration of the support allow it to effectively fill the target location; the device includes: A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and Multiple self-expanding delivery sleeves are linearly arranged and connected in series along the length of the delivery mechanism between the proximal pusher wire and the distal pusher wire, each of the delivery sleeves comprising: Multiple intersecting sleeve supports, the delivery sleeve supports defining multiple sleeve gaps between the interconnected sleeve supports along the length of the sleeve, the delivery sleeve being configured to switch between two forms: one is an elongated and undeployed form, in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that when the support is in the undeployed form, the delivery sleeve is coaxially placed within the support; the other is a relatively large deployed form. Proximal end cap, located at the proximal end of the delivery sleeve; A distal cap, located at the relatively distal end of the delivery sleeve; and A coupling mechanism, placed within the delivery sleeve, provides: An elongated coupling shaft having an axially extending length within the delivery sleeve; and At least one bracket snap is located approximately at the distal end of the engagement shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the end of the at least one bracket snap from the axial centerline is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket snap disengages from the delivery sleeve.

13. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent configured to transition between two configurations: an elongated and unexpanded configuration in which the outer diameter of the stent is smaller than the inner diameter of the conduit; and a relatively large expanded configuration in which the outer diameter and configuration of the stent effectively fill the target location; the device comprising: A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and At least one self-expanding delivery sleeve is located between the proximal pusher and the distal pusher, each of the at least one delivery sleeve comprising: Multiple independent sleeve strands are woven together to define multiple sleeve gaps between the intersecting sleeve strands along the length of the delivery sleeve. The delivery sleeve is configured to switch between two forms: one is an elongated and unexpanded form in which the outer diameter of the delivery sleeve is smaller than the inner diameter of the support, such that the delivery sleeve is coaxially placed inside the support when the support is in the unexpanded form; the other is a relatively large expanded form. A proximal end cap, located at the proximal end of the delivery sleeve, is used to maintain the braided arrangement of the sleeve strands of the delivery sleeve; A distal end cap, located at the relatively distal end of the delivery sleeve, serves to maintain the braided arrangement of the sleeve strands of the delivery sleeve; and The engagement mechanism, coaxially placed within the delivery sleeve, provides: A slender engagement shaft engages with the proximal end cap and extends a distance toward the distal end cap; and At least one bracket latch is located approximately at the distal end of the engagement shaft and configured to detachably engage with the support when both the delivery sleeve and the support are in their undeployed state; the length of the at least one bracket latch is less than the radius of the delivery sleeve in its deployed state, such that when both the delivery sleeve and the support are in their deployed state, the at least one bracket latch disengages from the delivery sleeve. Therefore, when using the device, with at least one delivery sleeve placed in the support in an undeployed state and the support placed in the conduit in an undeployed state, when the conduit reaches the target position, the proximal push wire is used to push the delivery mechanism, thereby advancing the at least one delivery sleeve and the support through the conduit via the at least one support latch; when both the at least one delivery sleeve and the support are withdrawn from the conduit, both the at least one delivery sleeve and the support automatically change to their respective deployed states, thereby disengaging the at least one support latch from both the at least one delivery sleeve and the support.

14. The support conveying device according to claim 1, further comprising the support.

15. The support conveying device according to claim 1, wherein, The proximal end cap of the at least one conveying mechanism engages with the proximal end push wire.

16. The support conveying device according to claim 1, wherein, The distal cap engages with the distal push wire.

17. The support conveying device according to claim 1, wherein, The at least one bracket snap is an elongated protrusion extending radially from the engagement axis of the engagement mechanism of the at least one delivery sleeve. The size and configuration of the at least one bracket snap are such that, when both the delivery sleeve and the bracket are in the undeployed state, it extends through the sleeve gap of the delivery sleeve and the bracket gap, which are arranged in a generally straight line.

18. The support conveying device according to claim 17, wherein, The engagement shaft of the engagement mechanism of the at least one delivery sleeve is provided with a plurality of radially spaced bracket snaps arranged circumferentially along the engagement shaft.

19. The support conveying device according to claim 1, wherein, The engagement mechanism of the at least one delivery sleeve further provides at least one sleeve latch, generally located at the distal end of the engagement shaft, and configured to detachably engage with the delivery sleeve when the delivery sleeve is in the undeployed state. The length of the at least one sleeve latch is less than the radius of the delivery sleeve in the deployed state, such that the at least one sleeve latch disengages from the delivery sleeve when the delivery sleeve is in the deployed state.

20. The support conveying device according to claim 19, wherein, The at least one sleeve clip is an elongated protrusion extending radially from the engagement shaft of the engagement mechanism of the at least one delivery sleeve, and the size and configuration of the at least one sleeve clip are such that it extends through the sleeve gap of the delivery sleeve when the delivery sleeve is in its undeployed state.

21. The support conveying device according to claim 20, wherein, The engagement shaft of the engagement mechanism of the at least one delivery sleeve is provided with a plurality of radially spaced sleeve snaps arranged circumferentially along the engagement shaft.

22. The support conveying device according to claim 19, wherein, The at least one bracket latch is longitudinally spaced from the at least one sleeve latch on the coupling shaft, such that when the bracket is in its undeployed state, the proximal end of the bracket is located between the at least one bracket latch and the at least one sleeve latch.

23. The support conveying device according to claim 19, wherein, The at least one bracket latch is rotated and offset relative to at least one sleeve latch on the engagement shaft.

24. The support conveying device according to claim 1, wherein, The length of the engagement shaft of the engagement mechanism of the at least one delivery sleeve is approximately half the length of the delivery sleeve.

25. The support conveying device according to claim 1, wherein, The conveying mechanism provides multiple conveying sleeves, which are linearly arranged and connected in series between the proximal pusher and the distal pusher along the length of the conveying mechanism.

26. The support conveying device according to claim 25, wherein, The conveying mechanism provides: A proximal delivery sleeve, located at the proximal end of the delivery mechanism; and The remote delivery sleeve is located at the remote end of the delivery mechanism.

27. The support conveying device according to claim 26, wherein: The proximal cap of the proximal delivery sleeve is engaged with the proximal push wire; as well as The distal cap of the distal delivery sleeve is engaged with the distal push wire.

28. The support conveying device according to claim 26, wherein, The conveying mechanism provides at least one intermediate conveying sleeve located between the proximal conveying sleeve and the distal conveying sleeve.

29. The support conveying device according to claim 26, wherein: At least one bracket snap on the engagement shaft of the proximal delivery sleeve is configured to detachably engage with the proximal end of the bracket when both the proximal delivery sleeve and the bracket are in an undeployed state. as well as At least one bracket snap on the engagement shaft of the distal delivery sleeve is configured to detachably engage with the distal end of the bracket when both the distal delivery sleeve and the bracket are in an undeployed state.

30. The support conveying device according to claim 25, wherein, The delivery sleeve is connected in series via the proximal end cap and the distal end cap.

31. A support conveying device, comprising: A self-expanding stent includes a plurality of intersecting stent struts that define a plurality of stent gaps between the interconnected stent struts along the length of the stent. The stent is configured to switch between two forms: an elongated and unexpanded form in which the outer diameter of the stent is small enough to be inserted into a catheter; and a relatively large expanded form in which the outer diameter and configuration of the stent allow the stent to effectively fill a target location. as well as A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and At least one self-expanding delivery sleeve is located between the proximal pusher and the distal pusher, each of the at least one delivery sleeve comprising: Multiple independent tubing strands are woven together to define multiple tubing gaps between the intersecting tubing strands along the length of the delivery tubing. The delivery tubing is configured to switch between two forms: an elongated and undeployed form in which the outer diameter of the delivery tubing is smaller than the inner diameter of the support, such that the delivery tubing is coaxially placed inside the support when the support is in the undeployed form; and a relatively large deployed form. A proximal end cap, located at the proximal end of the delivery sleeve, is used to maintain the braided arrangement of the sleeve strands of the delivery sleeve; A distal end cap, located at the relatively distal end of the delivery sleeve, serves to maintain the braided arrangement of the sleeve strands of the delivery sleeve; and The engagement mechanism, coaxially placed within the delivery sleeve, provides: An elongated engagement shaft engages with the proximal end cap and extends a distance toward the distal end cap; and At least one bracket snap is located approximately at the distal end of the engagement shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in the undeployed state. The length of the at least one bracket snap is less than the radius of the delivery sleeve when it is in the deployed state, such that the at least one bracket snap disengages from the delivery sleeve when both the delivery sleeve and the support are in the deployed state. Therefore, when using the device, with at least one delivery sleeve placed in the support in an undeployed state and the support placed in the conduit in an undeployed state, when the conduit reaches the target position, the proximal push wire is used to push the delivery mechanism, thereby advancing the at least one delivery sleeve and the support through the conduit via the at least one support latch; when both the at least one delivery sleeve and the support withdraw from the conduit, both the at least one delivery sleeve and the support automatically change to their respective deployed states, thereby disengaging the at least one support latch from both the at least one delivery sleeve and the support.

32. A stent delivery device configured to selectively place a self-expanding stent at a target location, the stent comprising a plurality of intersecting stent struts defining a plurality of stent gaps between the interconnected stent struts along the length of the stent, the stent being configured to transition between two forms: an extended and unexpanded form in which the outer diameter of the stent is smaller than the inner diameter of the conduit; Another type is a relatively large unfolded configuration, in which the outer diameter and configuration of the support allow it to effectively fill the target location; the device includes: A conveying mechanism, configured to be selectively coaxially placed within the support and detachably engaged with the support, the conveying mechanism comprising: The proximal pusher engages with the proximal end of the delivery mechanism and is configured to move the delivery mechanism and the support through the catheter; A distal pusher wire, located at the relatively distal end of the delivery mechanism, and configured to assist in guiding the delivery mechanism and the support through the conduit; and Multiple self-expanding delivery sleeves are linearly arranged and connected in series along the length of the delivery mechanism between the proximal pusher wire and the distal pusher wire, each of the delivery sleeves comprising: Multiple independent tubing strands are woven together to define multiple tubing gaps between the intersecting tubing strands along the length of the delivery tubing. The delivery tubing is configured to switch between two forms: an elongated and undeployed form in which the outer diameter of the delivery tubing is smaller than the inner diameter of the support, such that the delivery tubing is coaxially placed inside the support when the support is in the undeployed form; and a relatively large deployed form. A proximal end cap, located at the proximal end of the delivery sleeve, is used to maintain the braided arrangement of the sleeve strands of the delivery sleeve; A distal end cap, located at the relatively distal end of the delivery sleeve, serves to maintain the braided arrangement of the sleeve strands of the delivery sleeve; and The engagement mechanism, coaxially placed within the delivery sleeve, provides: An elongated engagement shaft engages with the proximal end cap and extends a distance toward the distal end cap; and At least one bracket snap is located approximately at the distal end of the engagement shaft and is configured to detachably engage with the support when both the delivery sleeve and the support are in the undeployed state. The length of the at least one bracket snap is less than the radius of the delivery sleeve when it is in the deployed state, such that the at least one bracket snap disengages from the delivery sleeve when both the delivery sleeve and the support are in the deployed state. Therefore, when using the device, the delivery sleeve is placed inside the support, and the support is placed inside the conduit. The delivery sleeve and the support are in their respective undeployed states. When the conduit reaches the target position, the proximal push wire is used to push the delivery mechanism, thereby advancing the delivery sleeve and the support through the conduit via the at least one support latch. When both the delivery sleeve and the support exit from the conduit, the at least one delivery sleeve and the support automatically transform into their respective deployed states, thereby disengaging the at least one support latch from the corresponding delivery sleeve and support.

Images