CUTTING CYLINDER CONFIGURATION AND METHOD FOR MAKING IT Russian patent published in 2014 - IPC A61M29/02 A61B17/3207 A61M25/10 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to cylinder angioplasty devices for passage dilation in the venous system. A cutting cylinder configuration for dissection of solid stenotic regions of the blood vessel comprises a delivery catheter, an expandable cylinder, as well as a dissecting mesh. The delivery catheter has a proximal end, a distal end and at least one lumen extended between the proximal and distal ends of the catheter. The expandable cylinder has a proximal end and a distal end and mounted on the distal end of the catheter. The dissecting mesh surrounds the expandable cylinder and is configured so that to be no bar to cylinder inflation and to return to an initial position after the cylinder blow-off. The dissecting mesh comprises intersecting filaments which interlaces between the proximal end of the mesh and the distal end of the mesh and form at least distal loops on the distal end of the mesh. The distal loops are configured so that to enable the binding of the distal loops of the dissecting mesh on the distal end of the mesh. At least, a portion of the filament of the crossed filaments interlace with adjoining filaments, forming a single permanent bond thereby presenting a dissecting element formed by bends of the twisted filaments, thereby forming at least one permanent binding on the distal end of the mesh. A method for making the cutting cylinder configuration for dissecting solid stenotic regions of the blood vessel provides the stages below. Preparing a certain number of the filaments with specific properties, diameter and length. Making the dissecting mesh of the filaments, including: preparing a plaiting pattern having a cylindrical structure comprising a number of pins along a circular surface of the configuration in lines and projecting therefrom outwards; arranging the filaments between the pins and crossing the filaments so that to form the dissecting mesh; crossing the filaments provides filament plaiting between the proximal end of the mesh and its distal end and twisting at least a portion of the filament to form at least one permanent bond to the adjoining filaments, forming the dissecting element formed by bends of the twisted filaments, thereby forming at least one permanent bond on the distal end of the mesh; forming at least distal loops on the distal end of the mesh; annealing the dissecting mesh. Preparing the feed catheter. Preparing the expandable cylinder. The above expandable cylinder is mounted on the distal end of the catheter. Mounting the dissecting mesh on the expandable cylinder.

EFFECT: invention is more flexible, safe and provides the improved dilation and treatment of fibrous damages.

26 cl, 5 dwg