A medical guiding microtube in which at the tip of a synthetic resin tube a balloon having substantially the same outer diameter as said tube is attached and a ball-like body connecting at the tip of said tube through yarn in defined length is provided within the balloon having optionally a hole for...http://www.google.sh/patents/US4909796?utm_source=gb-gplus-sharePatent US4909796 - Medical guiding microtubes
