An indwelling needle assembly has an inner needle having a sharp point at its tip, an inner needle hub fixed to a base section of the inner needle, a hollow outer needle into which the inner needle is inserted, an outer needle hub fixed to a base section of the outer needle, and a tube inserted into...http://www.google.fr/patents/US7740614?utm_source=gb-gplus-shareBrevet US7740614 - Indwelling needle assembly
