A method and system for delivering coolant to a medical device having an expandable element, a guidewire lumen movable within the medical device, and an actuator element coupled to the guidewire lumen for manipulation of longitudinal movement thereof is provided, including transferring a fluid from a console to the medical device to inflate the expandable element； manipulating the actuator element, and initiating a predetermined fluid control sequence of the console in response to the manipulation of the actuator element.
