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

Claim 13:
14. A method for guiding a catheter to a target site in a living body, the method comprising:
inserting the catheter into a living body, the catheter including an inner tube and a coil tube disposed on an outer peripheral side of the inner tube, the inner tube including a lumen, the lumen of the inner tube having an open proximal end and an open distal end, the coil tube being a wound 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 a gap between the inner tube and the coil tube in a natural state when no external force is applied to the catheter, and a winding direction of the at least one second coil being a different direction from a winding direction of the at least one first coil; and
rotating the coil tube relative to the inner tube around a central axis of the coil tube while advancing the catheter in a biological lumen of the living body along a guide wire in the lumen of the inner tube.