Catheter with expandable body

摘要

A catheter with an expandable body includes a shaft having a passage for permitting a working fluid to pass therethrough, an expandable body being capable of expansion and contraction and provided at a distal end portion of the shaft, and a tubular outer sleeve which is put on the outside of the expandable body and which has such a degree of extension/contraction property as to permit expansion of the expandable body. The outer sleeve is provided with a slit or slits which are closed upon contraction of the expandable body and are opened upon expansion of the expandable body.