Abrégé

The present application relates to a vascular closure assembly. A sheath tube inner cavity channel of an outer sheath tube (1100) comprises, along the axial direction, a main body channel section and a distal end channel section; an inner catheter (1200) is movably disposed in the sheath tube inner cavity channel of the outer sheath tube (1100); the inner catheter (1200) and the outer sheath tube (1100) are used for moving relative to one another along the axial direction, so that the catheter distal end of the inner catheter (1200) pushes a hemostatic material (A) stored within the distal end channel section out from the sheath tube distal end of the outer sheath tube (1100).

Classes IPC  ?

• A61B 17/12 - Instruments, dispositifs ou procédés chirurgicaux pour ligaturer ou comprimer par un autre moyen les parties tubulaires du corps, p. ex. les vaisseaux sanguins ou le cordon ombilical

Abrégé

A preparation method for embolization microspheres, comprising the following steps: grafting an unsaturated bond onto a water-soluble polymer to prepare a modified polymer; mixing the modified polymer, a water-soluble monomer, a water-soluble initiator and water to prepare a water-phase solution, the water-soluble monomer containing an unsaturated bond; mixing an oil-soluble stabilizer with an oily solvent to prepare an oil-phase solution; at a stirring rotating speed of about 500 r/min to about 1200 r/min and in an axial flow stirring mode, adding the water-phase solution to the oil-phase solution to form a water-in-oil emulsification system; and adding a catalyst to the emulsification system under a protective atmosphere while stirring, and subjecting the unsaturated bond in the modified polymer and the unsaturated bond in the water-soluble monomer to free radical polymerization, so as to prepare the embolization microspheres.

Classes IPC  ?

• A61L 24/00 - Adhésifs ou ciments chirurgicauxAdhésifs pour dispositifs de colostomie
• C08F 261/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères de monomères contenant de l'oxygène tels que définis dans le groupe

Abrégé

A conveying device and a medical device. The conveying device includes a catheter mechanism and a limiting body; wherein the catheter mechanism comprises an inner tube assembly and an outer tube, and the outer tube is sleeved on the inner tube assembly and is configured to be movable along an axial direction of the inner tube assembly; the limiting body is connected to a distal outer surface of the inner tube assembly and is configured to expand or contract along a radial direction of the inner tube assembly; the conveying device is configured such that the catheter mechanism is configured to load the medical stent and to release the medical stent when the outer tube moves from distal to proximal, and the limiting body is configured to expand when the medical stent is released so as to position the medical stent in a target position.

Classes IPC  ?

• A61F 2/966 - Instruments spécialement adaptés pour insérer ou retirer les stents ou les endoprothèses déployables couvertes possédant une gaine extérieure avec un mouvement longitudinal relatif entre la gaine extérieure et la prothèse, p. ex. utilisant une tige poussoir
• A61B 17/11 - Instruments, dispositifs ou procédés chirurgicaux pour refermer les plaies ou les maintenir ferméesAccessoires utilisés en liaison avec ces opérations pour réaliser l'anastomoseBoutons pour anastomose

Abrégé

A medical stent includes a covered segment and a naked segment. The covered segment includes a cut stent body and a film material arranged on the cut stent body. At least one end of the covered segment is connected with the naked segment, and at least one of the naked segments includes a braided stent body. The covered segment includes a first section, and the medical stent is configured such that an inner diameter of the first section in a first expansion state is smaller than an inner diameter of the cut stent body in a free state, and when the first section is subjected to a radially outward force, the first section expands radially outward. The medical stent has good flexibility and support, is easy to push, and can adjust the inner diameter of the first section according to actual needs, and has good universal applicability.

Classes IPC  ?

• A61F 2/90 - Stents ayant une forme caractérisée par des éléments filiformesStents ayant une forme caractérisée par une structure de type filet ou de type à mailles caractérisés par une structure de type filet ou de type à mailles

Abrégé

Disclosed are a stent implant and a preparation method therefor. The stent implant comprises a covered stent (110) and a braided stent (120); at least one end of the covered stent (110) in an axial direction is connected to the braided stent (120); the covered stent (110) comprises a cutting stent (111) and a covering (112); the metal coverage of the cutting stent (111) is 10% to 20%; a surface of a stent rod in the cutting stent (111) is covered with a connecting layer, and the connecting layer is configured to enhance a binding force between the covering (112) and the stent rod; the covering (112) comprises two layers of first membrane material (112a); the outer-layer first membrane material (112a) covers an outer surface of the cutting stent (111); the inner-layer first membrane material (112a) covers an inner surface of the cutting stent (111); the air permeability of the outer-layer first membrane material (112a) is less than that of the inner-layer first membrane material (112a). In this way, the present invention improves the radial supporting force of the stent implant while taking into account the flexibility of the stent implant and reducing the risk of lumen stenosis or occlusion of the covered stent (110).

Classes IPC  ?

• A61F 2/07 - Endoprothèses déployables couvertes
• A61F 2/90 - Stents ayant une forme caractérisée par des éléments filiformesStents ayant une forme caractérisée par une structure de type filet ou de type à mailles caractérisés par une structure de type filet ou de type à mailles

Abrégé

A stent delivery device (10) and a stent delivery system. The stent delivery device (10) comprises an inner tube (100), an outer tube (200), a restraining sheath (300), and a release sheath (400). The restraining sheath (300) and the release sheath (400) sleeve the inner tube (100), the outer tube (200) sleeves the restraining sheath (300) and the release sheath (400), and the restraining sheath (300) is located on the distal end side of the release sheath (400). The distal end of the release sheath (400) is provided with restraining wires (410), the restraining wires (410) being used for restraining a bare section (810) of a stent (800) outside the restraining sheath (300). The release sheath (400) is configured to move towards the proximal end of the outer tube (200) under an external force until the restraining wires (410) no longer restrain the bare section (810).

Classes IPC  ?

• A61F 2/07 - Endoprothèses déployables couvertes

Abrégé

A conveying device (1000) and a medical device. The conveying device (1000) comprises a catheter mechanism (1100) and a limiting body (1200), wherein the catheter mechanism (1100) comprises an inner tube assembly (1110) and an outer tube (1120); the outer tube (1120) is sleeved on the inner tube assembly (1110) and is configured to move in the axial direction of the inner tube assembly (1110); the limiting body (1200) is connected to the outer surface of the distal end of the inner tube assembly (1110) and is configured to expand or contract in the radial direction of the inner tube assembly (1110); the conveying device (1000) is configured as a catheter mechanism (1100) for loading a medical stent (2000), and when the outer tube (1120) moves from the distal end to the proximal end, the medical stent (2000) is released; and the limiting body (1200) is used for expanding when the medical stent (2000) is released, and positioning the medical stent (2000) at a target location. When the medical stent (2000) is released, the conveying device (1000) can effectively avoid the problem of inaccurate positioning caused by jump forward of the medical stent (2000).

Classes IPC  ?

• A61F 2/962 - Instruments spécialement adaptés pour insérer ou retirer les stents ou les endoprothèses déployables couvertes possédant une gaine extérieure
• A61F 2/07 - Endoprothèses déployables couvertes

Abrégé

The present invention provides a medical stent. The medical stent comprises a covered segment and a naked segment; the covered segment comprises a cutting stent body and a film material provided on the cutting stent body; the naked segment is connected to at least one end of the covered segment, and at least one naked segment comprises a woven stent body; the covered segment comprises a first section; the medical stent is configured such that the inner diameter of the first section in a first expansion state is smaller than the inner diameter of the cutting stent body in a free state, and when the first section is subjected to a radial outward external force, the first section expands outwards in the radial direction. The medical stent has good flexibility and support performance, is convenient to push, satisfies use requirements, has a first section which has an adjustable inner diameter according to actual needs, and has good universal applicability.

Classes IPC  ?

• A61F 2/82 - Dispositifs maintenant le passage ou évitant l’affaissement de structures tubulaires du corps, p. ex. stents

Abrégé

A support system comprising a support member (4), an inner tube (2), and an outer tube (3). The distal end and the proximal end of the support member (4) are respectively fixed to the inner tube (2) and the outer tube (3). The inner tube (2) is provided with a guide wire cavity (21), and a guide wire passing through the guide wire cavity (21) is able to be extended out from the distal end of the support member (4). The outer tube (3) is movably sleeved on the outer side of the inner tube (2). When the inner tube (2) moves in a first direction relative to the outer tube (3), the support member (4) gradually expands at least in the radial direction, and when the inner tube (2) moves in a second direction relative to the outer tube (3), the support member (4) gradually contracts at least in the radial direction, the first direction being opposite the second direction. When utilized and expanded to a suitable state, the support member (4) fits to a blood vessel wall, and provides stable support for the guide wire, thereby preventing the guide wire from bending due to insufficient supporting force, and effectively ensuring that the guide wire can accurately open up a CTO lesion.

Classes IPC  ?

• A61M 25/00 - CathétersSondes creuses