A catheter guide device configured to facilitate precise placement of a downstream end of a catheter within a patient. The catheter guide device comprises a torque assembly configured to frictionally engage an exterior surface of a catheter and a hub configured to engage a catheter sheath and thereby prevent rotation of the catheter sheath relative to the hub. The torque assembly is rotatably secured to the hub such that rotating the torque assembly relative to the hub rotates the catheter relative to the catheter sheath and thereby moves the downstream end of the catheter within the patient. The hub additionally comprises a detent mechanism configured to engage a plurality of gear teeth on an exterior surface of the torque assembly to thereby impede unintended rotation of the torque assembly relative to the hub.
