Stent indwelling device

A stent indwelling device configured to place a tube stent in a lumen tissue, the stent indwelling device comprising:

• a guide catheter having a longitudinal axis and configured to be inserted into the tube stent from a distal end side of the guide catheter;
• and
• a pusher catheter having a lumen into which the guide catheter is inserted, wherein
• the guide catheter includes:
• a core section having flexibility, the core section being longer than a dimension in an axial direction of the tube stent;
• an outer layer section having a tube shape surrounding an outer circumference of the core section, the outer layer section being fixed to the core section to define a cavity;
• a stent protection section movably disposed in the cavity between the core section and the outer layer section, a distal end and a proximal end of the stent protection section being positioned such that the stent protection section has a length longer than the dimension in the axial direction of the tube stent, the stent protection section being formed in an annular shape about the longitudinal axis when seen from a direction along the longitudinal axis, having stiffness resisting compression inward in a radial direction perpendicular to the longitudinal axis, and having flexibility in a direction in which the guide catheter is curved;
• and
• distal and proximal stoppers being spaced in the direction along the longitudinal axis at distal and proximal ends of the cavity to allow a predetermined range of expansion of the stent protection section in the direction along the longitudinal axis and to restrict movement of the stent protection section in the direction along the longitudinal axis outside of the predetermined range.