Abstract: In one particularly desirable form of the invention, the pneumatic vein inflation device for assisting in a medical testing and/or treatment procedure comprises a hard cylindrical tube, two inflatable ring-shaped bladders positioned in succession axially inside the hard cylindrical tube, an elastic jacket enclosing the inflatable bladders and the cylindrical tube holding the inflatable bladders in place and a means for pressurization and relief including a hand powered air pump and associated relief valve connected to a distribution valve which in turn is connected to one or the other inflatable bladder and a pressure gauge. Other forms of the instant invention can have various numbers of inflatable bladders.