An apparatus for inserting a catheter into a selected vein and to a selected position within such vein comprises a tubular sheath mountable in surrounding relation to a percutaneous needle to permit the distal end of the tubular sheath to enter the vein penetrated by the needle. The tubular sheath is...http://www.google.ca/patents/US5221263?utm_source=gb-gplus-sharePatent US5221263 - Catheter emplacement apparatus
