Patent ID: 8114047

Claim:
A drug solution infusion catheter comprising: a main body formed to allow a guidewire to move therethrough: and a distal end wall formed to close a distal end of the main body, the distal end wall comprising an elastic material, wherein a center portion of the distal end wall is thinner than a peripheral edge portion of the distal end wall, wherein the center portion of the distal end wall comprises a hole or an incision formed to normally close, the hole or the incision being formed at an axis of the main body, wherein the distal end wall is formed so as to comprise a resilience such that the center portion remains closed when under a liquid pressure from an outer side of the catheter, wherein, when the guide wire is pressed against the hole or the incision from an inner side of the catheter or the outer side of the catheter, the hole or the incision elastically opens to allow the guide wire to pass therethrough, and wherein the distal end wall further comprises: a first recess that is formed at the inner side of the catheter; and a second recess that is formed at the outer side of the catheter.