Patent ID: 9138306
Filing Date: 2015-09-22
Classification: A61F

Abstract:
1. A method of use for a detachment mechanism for a central venous access filter system having a catheter body, an outer sheath concentrically disposed about the catheter body wherein the catheter body and the outer sheath are moveable relative to one another, and a filter member having a first end coupled to the catheter body via a shape memory detachment mechanism and a second end movable relative to the catheter body, the shape memory detachment mechanism having a first state that immovably couples the first end of the filter member to the catheter body and a second state that removably couples the first end of the filter member to the catheter body, the method comprising the steps of: a. deploying the filter member within a blood vessel such that the filter member remains attached to the catheter body and has an enlarged diametric opening which opens facing a patient's blood flow and capturing embolic material within the opened filter member; and b. triggering a change of state of the shape memory detachment mechanism from its first state to its second state thereby releasing the filter member from the catheter body.