Social workers use practice experience to inform scientific inquiry and use research evidence to inform practice. As with the social work practitioner, social work educators also experience ethically-based challenges in relation to EBP. NASW and CSWE clearly promote an evidence-based focus in both social work practice and education.
Another common form is a set of fingers that press on the tube in sequence. Small-volume pumps usually use a computer-controlled motor turning a screw that pushes the plunger on a syringe. The classic medical improvisation for an infusion pump is to place a blood pressure cuff around a bag of fluid. The battlefield equivalent is to place the bag under the patient. The pressure on the bag sets the infusion pressure. The pressure can actually be read-out at the cuff's indicator.
A drum pump, also called an oil drum pump or oil barrel pump, is used to remove liquids from barrels, drums, tanks, and intermediate bulk containers (IBCs). Drum pumps consist of an intake tube, a pumping mechanism, an outflow hose, and often a nozzle of some type. Drum pumps come in many forms from the rotary type to a variety of other styles including lever, piston, siphon, double diaphragm, electric, and air. The 55 gallon drum pump is most common, because it is a standard drum size. The intake valve of a 55 gal drum pump is inserted into a bung hole, and the pump sits atop the barrel. The siphon drum pump, lever-action, and rotary drum pump, due to their simplicity, are the most commonly used type of 55 gallon drum pumps. An electric barrel pump reduces the time required to dispense liquids.