There is provided herein a non-occlusive blood restricting device for treating a vascular malformation, the blood restricting device consisting of a wire comprising a first section configured to be coiled into a first coil when deployed within the vascular malformation； wherein the first coil comprises a spiral or sequence of loops, the spiral or sequence of loops having a gradually decreasing diameter； and wherein the first coil is configured to line a neck and/or a wall of the vascular malformation so as to at least partially cover an orifice thereof, and a second section configured to be deployed within a blood vessel, adjacent the vascular malformation； wherein the second section is configured to form a second coil, circumferentially lining a wall of the blood vessel.
