Intracranial stent and method for intracranial stent

An intracranial stent, comprising:

• a proximal end portion having a first diameter when the intracranial stent is in an expanded state;
• a distal end portion having a second diameter equal to the first diameter when the intracranial stent is in the expanded state;
• a central portion located between the proximal end portion and the distal end portion, the central portion having a third diameter when the intracranial stent is in the expanded state, the third diameter being less than the first diameter and less than the second diameter;
• a proximal transition portion extending from the proximal end portion to the central portion;
• and
• a distal transition portion extending from the distal end portion to the central portion, the proximal transition portion and the distal transition portion being asymmetrical, and wherein the proximal transition portion and the distal transition portion each define a cone with a cone angle of approximately 60 degrees to approximately 120 degrees.

An intracranial stent, comprising:

• a proximal end portion having a first diameter when the intracranial stent is in an expanded state;
• a distal end portion having a second diameter when the intracranial stent is in the expanded state;
• a central portion located between the proximal end portion and the distal end portion, the central portion having an internal diameter that, when the intracranial stent is in the expanded state, is sized to provide an increased blood flow rate that is below a normal blood flow rate, the blood flow rate being calculated on the basis of the internal diameter of the central portion in the expanded state in comparison to the first diameter or the second diameter;
• a plurality of struts, wherein the plurality of struts form a plurality of interstices in the proximal end portion, the distal end portion, and the central portion;
• a plurality of crowns, the plurality of crowns connecting the plurality of struts to one another, the plurality of crowns defining a plurality of angles between the plurality of struts, the plurality of angles each being between 40° and 80°;
• and
• interstices defined by pairs of opposing crowns of the plurality of crowns, the interstices in the central portion being smaller than respective interstices in the proximal end portion and in the distal end portion when the intracranial stent is in the expanded state.