A catheter for administering intravascular treatments, the catheter comprising: an elongated tubular body comprising a proximal end, a distal end, and a length therebetween; a proximal expandable occluding element disposed on the tubular body, the proximal expandable occluding element expandable from a collapsed shape sized to traverse a guide catheter to an expanded shape sized to occlude a blood vessel; a distal expandable occluding element disposed on the tubular body in a distal direction in relation to the proximal expandable occluding element, the distal expandable occluding element expandable from a collapsed shape sized to traverse the guide catheter to an expanded shape sized to occlude the blood vessel; a first fluidic lumen comprising a proximal opening approximate the proximal end of the elongated tubular body and a distal opening positioned in the distal direction in relation to the proximal expandable occluding element and in the proximal direction in relation to the distal expandable occluding element; and a second fluidic lumen separate from the first fluidic lumen, the second fluidic lumen comprising a proximal opening approximate the proximal expandable occluding element and positioned in the proximal direction in relation to the proximal expandable occluding element and a distal opening approximate the distal expandable occluding element and positioned in the distal direction in relation to the distal expandable occluding element; and characterized in that the proximal expandable occluding element includes a spring-loaded body that is held in compression by the guide catheter when sheathed and opens when unsheathed. an elongated tubular body comprising a proximal end, a distal end, and a length therebetween; a proximal expandable occluding element disposed on the tubular body, the proximal expandable occluding element expandable from a collapsed shape sized to traverse a guide catheter to an expanded shape sized to occlude a blood vessel; a distal expandable occluding element disposed on the tubular body in a distal direction in relation to the proximal expandable occluding element, the distal expandable occluding element expandable from a collapsed shape sized to traverse the guide catheter to an expanded shape sized to occlude the blood vessel; a first fluidic lumen comprising a proximal opening approximate the proximal end of the elongated tubular body and a distal opening positioned in the distal direction in relation to the proximal expandable occluding element and in the proximal direction in relation to the distal expandable occluding element; and a second fluidic lumen separate from the first fluidic lumen, the second fluidic lumen comprising a proximal opening approximate the proximal expandable occluding element and positioned in the proximal direction in relation to the proximal expandable occluding element and a distal opening approximate the distal expandable occluding element and positioned in the distal direction in relation to the distal expandable occluding element; and characterized in that the proximal expandable occluding element includes a spring-loaded body that is held in compression by the guide catheter when sheathed and opens when unsheathed. <EOS>