Delivery systems (100) are described that include endoprostheses (102) configured to transition from compact, delivery configurations to enlarged, deployed configurations, delivery catheters including body (108) and tip (112) portions, the endoprostheses being received on body portions in the compact, delivery configuration, the tip portions including lips (114) configured to define pockets (114A) that releasably receive the endoprosthesis in the compact, delivery configuration, and constraints releasably maintaining the endoprostheses in the compact, delivery configuration. Additional and alternative delivery system features and associated methods are provided.

A stent delivery device (110) and a stent delivery system (100) are provided. The stent delivery device (110) includes a sheath core tube (112), an outer sheath tube (113) and an assembly (118). The outer sheath tube (113) is slidably provided on and surrounds the sheath core tube (112) in an axial direction, and an accommodating cavity (116) for accommodating a stent (120) is formed between the inner wall of the outer sheath tube (113) and the outer wall of the sheath core tube (112). The assembly (118) has a fixed end and a free end opposite to the fixed end. The fixed end is connected to the sheath core tube (112). When the stent (120) is radially pressed against the sheath core tube (112), the stent (120) is limited by the hooking of the free end to the stent (120). The stent delivery device (110) may improve the accuracy of assembly.

A valved endoprosthesis releasing device and a valved endoprosthesis pertaining to the medicine area, more particularly a device for releasing valved endoprosthesis specifically developed for the combined endovascular treatment of aortic valve disease and ascending aorta segment, said device allowing the assembly to travel endovascularly until the valved endoprosthesis is specifically coupled to repair injured segments of the ascending aorta and replace the calcified aortic valve, besides restoring the anatomy and assuring the consolidation of a suitable blood flow in the region to be treated. The invention comprises a valved endoprosthesis releasing device consisting of several overlapped tubular segments, wherein the movement of the sheath tube releases the valved endoprosthesis coupled to the proximal region for endovascular implantation by expanding the balloon or self-expanding a valved endoprosthesis provided with a tubular body coupled to an aortic valve.

A stent delivery device having a delivery configuration for delivering a stent to a treatment location and a deployment configuration for deploying the stent at the treatment location may include an outer sheath, an inner shaft slidably disposed within a lumen of the outer sheath, and a distal tip member fixedly attached to a distal end of the inner shaft. A distal portion of the outer sheath may include a plurality of longitudinal strips circumferentially disposed about the lumen of the outer sheath. At least a portion of the distal tip member may be configured to slide over a distal end of the outer sheath in the delivery configuration.

An indwelling device 1 is provided with: a sheath 20 that is capable of housing a stent graft 10; and a long shaft 30 that is configured to be capable of advancing or retreating inside the sheath along the axial direction. The shaft has a fixing tool 34 and a hollow tube 35 that are respectively engaged with a connection part 14 and a blood vessel wall fixing part 15 of the stent graft to restrict movement of an opening end 11a of the stent graft in the radial direction. The indwelling device is configured to be capable of releasing engagement between the connection part and the fixing tool and engagement between the blood vessel wall fixing part and the hollow tube independently of each other by displacing the shaft with respect to the stent graft in the axial direction.

A method for implanting a prosthesis centrally within a curved lumen includes loading a prosthesis into a delivery sheath, advancing the sheath in a patient towards the curved lumen to place at least the proximal end of the prosthesis within the curved lumen, and centering the proximal end of the prosthesis and/or the distal end of the sheath within the curved lumen. In a first advancing step, the outer catheter containing the inner sheath is advanced together towards the curved lumen to a location proximal of the curved lumen and, in a second advancing step, the inner sheath containing the prosthesis is advanced into the curved lumen to place at least the proximal end within the curved lumen while the outer catheter substantially remains at the location. After centering, the proximal end of the prosthesis is deployed centered within the curved lumen.

A shaft-shaped member 30 of an indwelling device 1 has an engaged portion 33 with which an engaging portion 15 of a tubular treatment device 10 engages, and a restriction portion 34 that restricts expansion of the engaging portion 15 engaged with the engaged portion 33 in a radial direction in cooperation with a linear member 36. The restriction portion 34 releases restriction on the expansion of the engaging portion 15 in the radial direction by releasing winding of the linear member 36 around the engaging portion 15.

A stent delivery system can include a core member having a distal portion, where the distal portion is configured to be positioned within a lumen of the stent; a cover having a first end portion coupled to the distal portion of the core member and a free second end portion, the cover having (a) a first position in which the second end portion of the cover is configured to at least partially surround a proximal end portion of the stent while the stent is positioned over the core member in a compressed state, and (b) a second position in which the second end portion of the cover is uncoupled from the stent; and a shoulder coupled to the distal portion of the core member at a location distal to the first end portion of the cover, the shoulder configured to abut the proximal end portion of the stent.

The present disclosure relates to a stent delivery component, a stent delivery system and a stent system. In particular, a stent delivery component including a base and at least two clamping wings which are rotatably connected with the base, respectively, is provided. In one aspect, the stent delivery component can effectively enclose the stent to complete delivery. In another aspect, the stent delivery component is kept in line contact with an inner wall of a delivery catheter to reduce the contact area, thereby reducing the frictional resistance and being beneficial to reduce the operation difficulty and increasing the delivery efficiency.

An aortic graft assembly includes a tubular component that defines a wall aperture having a proximal end that extends perpendicular to a major longitudinal axis of the tubular aortic component, and a tunnel graft connected to the wall of the tubular aortic component and extending from the wall aperture toward a proximal end of the tubular aortic component. The aortic graft assembly is delivered to a patient through the wall aperture and into interfering relation with the tunnel graft to treat aortic aneurysms.