A kind of dilating catheter system, including an ontology, a seal wire, dilating catheter have elongated shaft. The dilating catheter system may include locking mechanism to prevent conducting wire from moving relative to elongated shaft or locking seal wire to dilating catheter, to form fixed line unit. The dilating catheter system may include stablizing pipe from actuator, to provide rigidity and seal wire. The dilating catheter may include that element of holding with a firm grip is arranged on multiple grip features. The dilating catheter may include that cap biases toward first longitudinal direction position and moves to second longitudinal direction position. Conduit is fixed to lid and prevents angle orientation from changing first longitudinal direction position and freely change angle orientation in second longitudinal direction position.
