The instrument here presented pumps fluid or gas through a rubber tube by the action of a series of rollers on a tube. It has been in use for several years and has proved advantageous for numerous clinical and laboratory operations, including direct and indirect blood transfusion, aspiration of fluids from body cavities, infusion, administration of artificial pneumothorax, and circulation between appliances for various purposes. The transfusion of blood and the administration of pneumothorax are the more recent accomplishments and are done with particular facility. The milking principle of the pump deals well with viscid, sticky or coagulable fluids while pumps that depend on the action of pistons or automatic valves are liable to obstruction. Additional features are the continuous stream, accurately measurable delivery, instantly reversible action, production of ample degrees of both pressure and suction, and ready adaptability to aseptic operation.
The pump has a wheel 14 cm. in
Van Allen CM. A PUMP FOR CLINICAL AND LABORATORY PURPOSES WHICH EMPLOYS THE MILKING PRINCIPLE. JAMA. 1932;98(21):1805–1806. doi:10.1001/jama.1932.27320470003010a