Stent expansion system using a pulsated fluid medium

摘要

The stent expansion system comprises a balloon catheter (1), which has a portion (8) of its tubular shaft (2) sequentially squeezed between a ram (30) reciprocating in a box (18) and a saddle (36) arranged in a cover (19) closely fitting on the box (18). The pressurised fluid medium supplied to the balloon is pulsated by the squeeze and release action of the ram and saddle arrangement.