Embolic device, an apparatus for embolizing a target vascular site and a method thereof

An embolic device for embolizing a target vascular site, the embolic device comprising:

• a straight core which serves as the backbone of the embolic device;
• and
• a water-responsive element having an original shape and a deformed shape, the water-responsive element being coated on the straight core in a manner such that the original shape of the water-responsive element follows the straight core,
• wherein the straight core and the water-responsive element are stretched to lengthen into a temporary shape for deployment,
• wherein, in the temporary shape for deployment, the water-responsive element is in the deformed shape which is also straight, the water-responsive element in the deformed shape having a cross-sectional diameter of a smaller size than an original cross-sectional diameter of the water-responsive element in the original shape, and the water-responsive element in the deformed shape having a length longer than an original length of the water-responsive element in the original shape,
• wherein the straight core and the water-responsive element are provided in the temporary shape,
• wherein the water-responsive element is configured to resume the original shape in response to an external stimulus in form of coming into contact with water being applied to the water-responsive element in its deformed shape, and
• wherein, when the water-responsive element starts to return to the original shape upon coming into contact with water, the straight core still remain in a stretched and lengthen state, which causes the embolic device to buckle and form a random or regular shape to embolize the target vascular site and prevent fluid flow through the target vascular site.