A syringe for use in a human factors study, comprising: a barrel 12 having a closed forward end 12a and an open rear end 12b, a plunger rod 18 disposed in the barrel and axially moveable therein, and a stopper 16 disposed on the plunger rod, the stopper comprising a fluid passageway 14 for establishing fluid communication between the storage chamber and a rearward end of the stopper. In use, forward axial movement of the plunger and the stopper in the barrel causes an increase in pressure of a liquid contained in the storage chamber, and causes the liquid to flow rearwardly through the fluid passageway in the plug, out of the storage chamber. An absorbent material such as cotton wool 26, 26a, 26b may absorb the liquid being expelled rearwardly from the device. The device may be used in an autoinjector. A method of making the device is provided. A standard syringe may be modified by removing the needle from the front, providing a seal in its place, and using the needle to pierce the stopper and provide the fluid channel.
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