Syringe activated-valve for flushing a catheter and methods thereof

A delivery system for delivering an implant to an anatomical site in a patient, comprising:

• an intravascular catheter comprising a connector;
• a syringe-activated valve permanently joined to said connector, the syringe-activated valve comprising:
• a valve housing comprising a proximal end, a distal end, and an axial bore comprising a proximal cylindrical bore, a distal cylindrical bore, and a tapered shoulder positioned between said proximal cylindrical bore and said distal cylindrical bore;
• a substantially elongate, unitary sealing member enclosed by said valve housing, comprising an open position and a closed position, said sealing member slidably and axially disposed in said axial bore, said sealing member comprising a proximal cylindrical portion, a distal cylindrical portion, and an intermediate portion, said intermediate portion of said sealing member comprising a tapered shoulder, said shoulder interfacing with and cooperating with said tapered shoulder of the axial bore in the closed position, wherein a portion of the sealing member is longitudinally compressed when the sealing member moves from the closed position to the open position;
• and
• a backstop positioned in said distal bore distal to said distal portion of said sealing member and terminating proximal to said distal end of said valve housing, wherein said sealing member occludes said axial bore in the closed position and opens said axial bore in said open position;
• and
• a port for introducing the implant into the intravascular catheter for delivery to the anatomical site of the patient.