An assembly comprising: - a tubular element having: - a main tube with an inner space defined between a first and a second end portion along a longitudinal axis of the main tube and at least an end opening at the first end portion from the inner space to surroundings of the main tube, and - at least a first and a second side opening each being positioned between the first and second end portions, - at least a first and a second transport wire, and - a delivery introducer, the tubular element being collapsed and positioned in the delivery introducer, the first and second transport wires provided within the main tube and extending within the delivery introducer, wherein: - each transport wire has a length, a first end, a second end, a first part and a second part, - the first parts of each transport wire extend from inside the main tube and out of the tubular element through the end opening and in a direction away from the main tube, - the second part of the first transport wire extends from inside the main tube and out of the tubular element through the first side opening, along the main tube and in the direction away from the main tube, and - the second part of the second transport wire extends from inside the main tube and out of the tubular element through the second side opening along the main tube and in the direction away from the main tube, - the length of each transport wire being sufficient for the first and second ends of the transport wire to extend out of a person when the tubular element is positioned within a blood vessel of the person. - a tubular element having: - a main tube with an inner space defined between a first and a second end portion along a longitudinal axis of the main tube and at least an end opening at the first end portion from the inner space to surroundings of the main tube, and - at least a first and a second side opening each being positioned between the first and second end portions, - at least a first and a second transport wire, and - a delivery introducer, the tubular element being collapsed and positioned in the delivery introducer, the first and second transport wires provided within the main tube and extending within the delivery introducer, wherein: - each transport wire has a length, a first end, a second end, a first part and a second part, - the first parts of each transport wire extend from inside the main tube and out of the tubular element through the end opening and in a direction away from the main tube, - the second part of the first transport wire extends from inside the main tube and out of the tubular element through the first side opening, along the main tube and in the direction away from the main tube, and - the second part of the second transport wire extends from inside the main tube and out of the tubular element through the second side opening along the main tube and in the direction away from the main tube, - the length of each transport wire being sufficient for the first and second ends of the transport wire to extend out of a person when the tubular element is positioned within a blood vessel of the person. - a main tube with an inner space defined between a first and a second end portion along a longitudinal axis of the main tube and at least an end opening at the first end portion from the inner space to surroundings of the main tube, and - at least a first and a second side opening each being positioned between the first and second end portions, - at least a first and a second transport wire, and - a delivery introducer, the tubular element being collapsed and positioned in the delivery introducer, the first and second transport wires provided within the main tube and extending within the delivery introducer, wherein: - each transport wire has a length, a first end, a second end, a first part and a second part, - the first parts of each transport wire extend from inside the main tube and out of the tubular element through the end opening and in a direction away from the main tube, - the second part of the first transport wire extends from inside the main tube and out of the tubular element through the first side opening, along the main tube and in the direction away from the main tube, and - the second part of the second transport wire extends from inside the main tube and out of the tubular element through the second side opening along the main tube and in the direction away from the main tube, - the length of each transport wire being sufficient for the first and second ends of the transport wire to extend out of a person when the tubular element is positioned within a blood vessel of the person. - each transport wire has a length, a first end, a second end, a first part and a second part, - the first parts of each transport wire extend from inside the main tube and out of the tubular element through the end opening and in a direction away from the main tube, - the second part of the first transport wire extends from inside the main tube and out of the tubular element through the first side opening, along the main tube and in the direction away from the main tube, and - the second part of the second transport wire extends from inside the main tube and out of the tubular element through the second side opening along the main tube and in the direction away from the main tube, - the length of each transport wire being sufficient for the first and second ends of the transport wire to extend out of a person when the tubular element is positioned within a blood vessel of the person.