A manipulator (20), including an elongated chassis (24) containing a U-shaped channel (36) defining a distal direction and a proximal direction. The manipulator also includes an adjuster (40) that is configured to slide in the U-shaped channel. The adjuster includes a first wheel (56) which on rotation translates a guidewire (44) positioned in the adjuster along an axis of the guidewire, and a second wheel (60) which on rotation rotates the guidewire positioned in the adjuster about the axis of the guidewire. The adjuster also includes a port (102), distal to the first and the second wheel, that is configured to accept a tubular balloon and the guidewire.