Patent ID: 11890428
Assignee: TERUMO KABUSHIKI KAISHA
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A catheter, the catheter comprising:
an inner tube, the inner tube including a lumen with an open proximal end and an open distal end;
a coil tube disposed on an outer peripheral side of the inner tube, the coil tube being a wound wire coil, the coil tube having at least one first coil and at least one second coil, the at least one second coil being located concentrically with the at least first coil and whose winding direction of the wound wire coil is different from that of the at least one first coil;
a gap between the inner tube and the coil tube in a natural state in which the inner tube is rotatable relative to the coil tube around a central axis of the coil tube when no external force is applied to the catheter; and
a rotary operation unit fixed to a proximal portion of the coil tube, the rotary operation unit configured to transmit a rotational force to the coil tube.