Patent ID: 8226613

Claim:
A stylet which is inserted into a lumen of a catheter, the stylet comprising: first and second stylets, each stylet including: a stylet main body; a tapered tubular engaging part of which a rear end engages an edge at a tip end opening of the catheter by pressing the engaging part towards a base end of the catheter in a state in which the shape of a tip end part is substantially maintained and a rear part is urged so as to expand in a radial direction and project from the tip end opening of the catheter such that when the two stylets have been inserted into the lumens of the catheter, the engaging parts of the two stylets projecting from the tip end opening of the catheter form a substantially conical shape; and a soft linking part which links a tip end of the stylet main body and the rear end of the engaging part; whereby when the stylet main body is pulled towards the base end of the catheter, from a state in which the stylet main body is inserted into the lumen of the catheter and the engaging part is projecting from the tip end opening of the catheter, the rear part of the engaging part contracts in the radial direction, and the engaging part passes through the lumen of the catheter so that it can be withdrawn at the base end of the catheter.