Medical kit, medical system, and covering device for the treatment of aneurysms

A medical kit for treatment of a vascular malformation comprising:

• a permanently implantable covering device covering the vascular malformation, wherein the covering device has a tubular self-expandable mesh structure and a covering produced from an electrospun fabric, wherein the covering is connected to the mesh structure and at least partially covers the mesh structure in order to be placed over the vascular malformation in an implanted state, wherein the covering includes an electrospun fabric having pores formed by electrospinning, wherein the fabric is perforated, at least in regions, by further pores formed by laser cutting or thermal widening using a laser;
• and
• an embolisation means which, in the implanted state, is configured to be applied by means of a delivery means for the treatment of the vascular malformation, wherein the covering forms a porous membrane adapted to be penetrated by the delivery means for application of the embolisation means and is adapted to lie against an outer circumference of the delivery means when in a penetrated state, wherein the porous membrane of the covering is adapted to at least partially contract an opening formed by the delivery means when the porous membrane is penetrated following removal of the delivery means, wherein the porous membrane of the covering is adapted to contract the opening by at most 80% of a diameter of the delivery means, wherein the delivery means has a distal outer diameter of at most 0.7 mm, and wherein in an expanded state, cells of the mesh structure have an inscribed diameter or are expanded to the inscribed diameter which corresponds to at least the external diameter of the delivery means.