Medical device and system having such a device

Abstract

A medical device, having a body that is tubular at least in some sections. The body can be transferred from a compressed state into an expanded state and has a circumferential wall having at least one first lattice structure and one second lattice structure. The first lattice structure and the second lattice structure form separate layers of the circumferential wall, which are arranged coaxially one inside the other and connected to each other at least at points in such a way that the first lattice structure and the second lattice structure can be moved relative to each other at least in some sections. A system having such a device is also disclosed.

1 . A medical device, comprising a body which is tubular at least in some sections, can be transferred from a compressed state to an expanded state and has a circumferential wall with at least a first lattice structure and a second lattice structure, wherein the first lattice structure and the second lattice structure form separate layers of the circumferential wall, which layers are arranged coaxially one inside the other and are connected to each other at least at points, in such a way that the first lattice structure and the second lattice structure are movable relative to each other at least in some sections. 
     
     
         2 . The medical device as claimed in  claim 1 , wherein the first lattice structure and/or the second lattice structure is formed in each case from interwoven wires. 
     
     
         3 . The medical device as claimed in  claim 1 , wherein the first lattice structure has a proximal end, which is connected to a proximal end of the second lattice structure in such a way that distal ends of the first and second lattice structures arranged opposite the proximal ends are movable relative to each other. 
     
     
         4 . The medical device as claimed in  claim 1 , wherein the first lattice structure and the second lattice structure, in a production state, have braiding angles that are the same at least in some sections or different from one another. 
     
     
         5 . The medical device as claimed in  claim 4 , wherein the braiding angle of the first lattice structure and/or of the second lattice structure is at most 70°, in particular at most 65°, in particular at most 60°, in particular at most 59°, in particular at most 57°, in particular at most 55°, in particular at most 52°, in particular at most 50°. 
     
     
         6 . The medical device as claimed in  claim 1 , wherein, in a radially expanded state of the tubular body, a gap is formed at least in some sections between the first lattice structure and the second lattice structure. 
     
     
         7 . The medical device as claimed in  claim 1 , wherein the first lattice structure and the second lattice structure each have closed meshes, wherein the size of the meshes of the first lattice structure is different than the size of the meshes of the second lattice structure. 
     
     
         8 . The medical device as claimed in  claim 2 , wherein the wires of the first lattice structure have a smaller cross-sectional diameter than the wires of the second lattice structure. 
     
     
         9 . The medical device as claimed in  claim 2 , wherein the first lattice structure has a greater number of wires than the second lattice structure. 
     
     
         10 . The medical device as claimed in  claim 1 , wherein the first lattice structure forms an outer layer and the second lattice structure forms an inner layer of the tubular body. 
     
     
         11 . The medical device as claimed in  claim 1 , wherein the first lattice structure has an axial lengthwise extent that is smaller than an axial lengthwise extent of the second lattice structure, in such a way that the first lattice structure covers the second lattice structure in some sections, in particular by at least 20%, in particular by at least 30%, in particular by at least 40%, in particular by at least 50%, in particular by at least 60%. 
     
     
         12 . The medical device as claimed in  claim 1 , wherein the tubular body has a third lattice structure which together with the first lattice structure forms the outer layer of the tubular body. 
     
     
         13 . The medical device as claimed in  claim 12 , wherein the first lattice structure is connected at a proximal end, and the third lattice structure at a distal end, to the second lattice structure which forms the inner layer of the tubular body. 
     
     
         14 . The medical device as claimed in  claim 12 , wherein the first lattice structure and the third lattice structure overlap at least in some sections in a radially compressed state or a radially expanded state. 
     
     
         15 . The medical device as claimed in  claim 12 , wherein the first lattice structure and the third lattice structure each comprise a proximal end, which is connected to the second lattice structure, wherein the proximal end of the first lattice structure is arranged at a distance from the proximal end of the third lattice structure. 
     
     
         16 . The medical device as claimed in  claim 1 , wherein the first lattice structure comprises a middle section and two edge sections delimiting the middle section, wherein the first lattice structure has a smaller braiding angle in the middle section than in the edge sections. 
     
     
         17 . The medical device as claimed in  claim 10 , wherein the distance between the outer layer and the inner layer varies in the expanded state of the body, wherein the distance alternately decreases and increases at least in some sections. 
     
     
         18 . The medical device as claimed in  claim 17 , wherein the outer layer, in the expanded state of the body, has an undulating contour at least in some sections. 
     
     
         19 . The medical device as claimed in claim, wherein the outer layer  14  has alternately disposed peaks and valleys, wherein at least some, in particular all, of the valleys are connected to the inner layer and/or are preshaped, in particular preshaped by heat treatment, and/or have another braiding angle than the peaks. 
     
     
         20 . A system for medical uses, with a device as claimed in  claim 1 , and with a delivery system which comprises a flexible delivery element, in particular a guide wire, wherein the delivery element is connected or connectable to the device.