RECONSTRAINABLE STENT DELIVERY SYSTEM WITH AN ANNULAR LOCK AND METHOD

摘要

Devices, systems and methods are described and involve deploying and reconstraining a stent. An intravascular device with first and second elongated tubular members capable of axial motion relative to a housing having an annular lock configured to secure an expandable intraluminal device in first state and release the intraluminal device in second state, the intraluminal device being coaxialiy disposed over the second elongated tubular member proximal of a distal stop. Actuators on the housing may withdraw or advance the first and second tubular members. The first tubular member is withdrawn to deploy the stent and is advanced to reconstrain the stent. The second tubular member is withdrawn to engage the distal stop with the annular lock prior to reconstraining. The device may have a directional control that is engaged by an actuator to al low only proximal motion of the first elongated tubular member relative to the housing and allows only distal motion of the first elongated tubular member when disengaged.