Abstract: The invention relates to an intravascular functional element with a tubular grid structure (12) that has a wire (10) or several wires (10) respectively of an alloy with nickel and titanium as alloying elements, wherein a mixed oxide layer with a layer thickness of 15 nm to 100 nm and containing TiO2 and at least one nitride, especially titanium oxynitride and/or titanium nitride, is formed on the surface of the wire or on the surface of the wires (10)/of the wires (10), wherein the grid structure forms cells of mutually crossing wires (10) or wire segments of the wire (10) in longitudinal direction and in circumferential direction respectively and in circumferential direction there are disposed at least 6 cells, especially at least 12 cells, especially at least 16 cells, especially at least 24 cells, especially at least 36 cells, especially at least 48 cells.

Abstract: The invention relates to a method of manufacture of an intravascular functional element that can be introduced into a hollow organ and that comprises at least one wire (10) of an alloy having nickel and titanium as alloying elements, with the following steps: preparation of a metal body of the wire (10) with a metallic surface, then formation of a first oxide layer on the metallic surface of the metal body, then performance of a heat treatment of the wire (10) in a nitrogen-containing salt bath for thermal formation of a second mixed oxide layer on the first oxide layer, wherein the total layer thickness is 15 nm to 100 nm and the mixed oxide layer contains TiO2 and at least one nitride, especially titanium oxynitride and/or titanium nitride.

Abstract: A medical device with a radially compressible and expandable lattice structure (10) contains at least one closed cell (15) delimited in each case by four webs (11, 12, 13, 14) coupled to one another in one piece, of which at least one web (11, 12, 13, 14) is embodied as a stabilisation web (11, 13) with a first web width b1 and at least two further webs (11, 12, 13, 14) are embodied as connecting webs (12, 14) with a second web width b2, wherein the connecting webs (12, 14) are arranged inside the cell (15) so that they lie parallel opposite one another and are connected to one another by the stabilisation webs (11, 13) and wherein the ratio b1/b2 between the first web width b1 and the second web width b2 is at least 1.2.

Abstract: The invention relates to an intravascular functional element with a tubular grid structure (12) that has a wire (10) or several wires (10) respectively of an alloy with nickel and titanium as alloying elements, wherein a mixed oxide layer with a layer thickness of 15 nm to 100 nm and containing TiO2 and at least one nitride, especially titanium oxynitride and/or titanium nitride, is formed on the surface of the wire or on the surface of the wires (10)/of the wires (10), wherein the grid structure forms cells of mutually crossing wires (10) or wire segments of the wire (10) in longitudinal direction and in circumferential direction respectively and in circumferential direction there are disposed at least 6 cells, especially at least 12 cells, especially at least 16 cells, especially at least 24 cells, especially at least 36 cells, especially at least 48 cells.

Abstract: The invention relates to a method of manufacture of an intravascular functional element that can be introduced into a hollow organ and that comprises at least one wire (10) of an alloy having nickel and titanium as alloying elements, with the following steps: preparation of a metal body of the wire (10) with a metallic surface, then formation of a first oxide layer on the metallic surface of the metal body, then performance of a heat treatment of the wire (10) in a nitrogen-containing salt bath for thermal formation of a second mixed oxide layer on the first oxide layer, wherein the total layer thickness is 15 nm to 100 nm and the mixed oxide layer contains TiO2 and at least one nitride, especially titanium oxynitride and/or titanium nitride.

Abstract: A medical device for removing concretions from hollow organs of the body, with a functional element, which has a rotationally symmetrical lattice structure, and a device for holding a concretion in the structure, and a catheter for introducing the element into the body and removing it. The element can be converted from a compressed state in the catheter to an expanded state outside the catheter, in the expanded state the element is arranged distally from the catheter. The structure has a cutting area with webs, adapted so they at least partially pass radially through the concretion when the element is converted from the compressed to the expanded state. A holding element is connected on one hand to the structure and on the other hand to a guide wire arranged in the catheter, so that the holding element is deflected radially inwards in the expanded state of the functional element.

Abstract: A medical implant having a wall, which can be transferred from a compressed to an expanded state and includes a mesh structure formed of first struts, wherein the mesh structure has closed cells, each having a retaining element, which is adapted to anchor the expanded mesh structure in a vessel. The retaining element has at least two second struts which are connected to one another and form a tip which projects into the cell, and are connected to the first struts of the cell.

Abstract: A medical device for releasing in a hollow organ having a hollow cylindrical body that can be transferred in a compressed state having a reduced diameter and in an expanded state having an enlarged diameter. The body having a stop means at the proximal and/or distal axial end thereof having at least one retaining element connected to the body by a connecting segment. The retaining element and the body are decoupled by the connecting segment such that the retaining element has a smaller curvature in the compressed state than the body. The connecting segment elastically connects the retaining element and the body, wherein the contour of the retaining element in the compressed state of the body protrudes past the outer circumference of the body such that the retaining element is displaceable radially inward relative to the body into a stop position through the inner wall of an insertion system.

Abstract: A stent with a tubular grid structure (10) includes struts (11) and cell openings (12) formed by the struts (11), wherein in the expanded state of the stent the grid structure has a certain outer diameter DA in mm and the struts each have a certain length L in mm, the outer diameter DA of the stent and the length L of the struts being in a certain ratio.

Abstract: A tracheostomy dilator comprises a rod which is penetrated by an inner lumen. Both ends of the inner lumen are open, at the end facing the patient and at the end of the tracheostomy dilator facing away from the patient. The end facing the patient is provided with a thread. The tracheostomy dilator is used as screw dilator and can widen the tissue in one single dilation process such that a further tracheostomy cannula can be inserted into the trachea.