Vascular navigation and visualization assist device

Claim 1

An intravascular device for use in combination with a guide wire and a guide catheter, the device comprising: an elongate shaft with an exterior, a proximal end and a distal end, the elongate shaft including an inner tube defining a proximal end, a distal end and a first lumen, the shaft further including an outer tube defining a proximal end and a distal end, the outer tube disposed about the inner tube defining a second annular lumen therebetween, the second lumen being in fluid communication with the exterior of the shaft through a distal face opening, the distal end of the inner tube extending distally beyond the distal end of the outer tube., the distal end of the inner tube engaging the distal end of the outer tube so as to limit relative longitudinal movement and transmit longitudinal force from the outer tube to the inner tube; a first fitting connected to the proximal end of the elongate shaft, the first fitting being in fluid communication with the first lumen; and a second fitting connected to the proximal end of the elongate shaft, the second fitting being in fluid communication with the second lumen.