An embolus trap device is provided. The embolus trap device consists of an outer catheter, an inner catheter, a plurality of filter baskets, and a plurality of basket collapse wires. The filter baskets are of different radius and are positioned along the inner catheter in order of increasing radius from the proximal to the distal end. The filter baskets increase in radius so that any embolic fragment that flows past each basket has a chance to be caught and secured by a filter basket distal to it. The filter baskets are separately collapsible by the plurality of collapse wires and are collapsed in proximal-to-distal fashion with the largest basket being closed last in order to capture embolic fragments that may emerge from the smaller baskets because of disruptions as they are closed.