The present disclosure relates generally to the use of medical devices for the treatment of vascular conditions. In particular, the present disclosure provides devices and methods of using a kit, which includes a guidewire and a support catheter, both of which are capable of penetrating a calcified and/or fibrous total occlusion. The guidewire and the support catheter each comprise an expandable member adjacent its distal end. The guidewire and support catheter are used in cooperation with one another to cross an occlusion in a step-wise fashion by alternately deploying and retracting the expandable member of the support catheter while the guidewire is inserted into the occlusion and deploying the expandable member of the guidewire while the support catheter is inserted into the occlusion.
