Balloon catheter device for atraumatic expansion of hollow organs, and a method for producing such a balloon catheter device

A balloon catheter device for atraumatic dilation of hollow organs, comprising a balloon catheter with a balloon,

• a tubular functional sleeve applied to the balloon for directional segmented cushion-like unfolding of the balloon, and wherein
• the functional sleeve is folded in an initial state together with the balloon about a sleeve longitudinal axis, and wherein the folding of the functional sleeve is directed as pleating about a sleeve longitudinal axis and is unfoldable in a final state for abutting against an inner wall of a hollow organ, and wherein the tubular functional sleeve has planar sections and/or planar struts which delimit through-openings, so that the functional sleeve delimits balloon expansion in sections, wherein the functional sleeve is connected to the balloon in the region of the planar sections and/or the planar struts, wherein the through openings are formed as laser-cut slits, wherein sections with axial slits, which are referred to as axial sections, and sections with tangential slits, which are referred to as tangential sections, are formed alternately in the functional sleeve in an axial direction of the functional sleeve, and wherein the axial sections and the tangential sections are arranged spaced from each another.