Abstract: Preferably, an intravenous assist device includes at least, a pneumatic tourniquet portion, a pneumatic barrier having a first side contactingly adjacent the pneumatic barrier, a tissue compression portion contactingly adjacent a second side of said pneumatic barrier, and a pneumatic gate in fluid communication with each the pneumatic tourniquet portion and the tissue compression portion. The pneumatic gate promotes an inflation of the tissue compression portion only after full inflation of the pneumatic tourniquet forms a tourniquet. The pneumatic gate is formed between the pneumatic tourniquet portion and the tissue compression portion by an aperture only.