Vein catheter for coaxial blood stream and use of a split needle for its introduction in a vein

摘要

An intravenous catheter comprising an inner return tube (1) having return mouth or tip (2) and attached to the return tube (1) an outer access or draw-off tube (3) having draw-off openings (4), where tube (3) and openings (4) are arranged around and coaxial with the inner tube (1), at least along that part which in use is to be inside the vein (8), whereby the distal end of the return tube (1) extends beyond the distal end of the access tube (3), the distance between the return mouth (2) and this distal end preferably being at least twice the width of an approved stasis band.