A multi-panel shield or sheath constructed to define an envelope into which an intravenous needle having a sharpened cannula may be withdrawn upon removal from a vein. The envelope has a compression flap adapted to overlie the venipuncture site while the needle is being withdrawn from the vein, whereby...http://www.google.fr/patents/US4935011?utm_source=gb-gplus-shareBrevet US4935011 - Sheath for intravenous needle
