1 Aspirator (medical device) , a suction device used to remove bodily fluids from a patient. 2  Aspirator (pump) , a device producing vacuum by the Venturi effect in a constricted stream of fluid. 3  Aspirator (entomology) , also known as pooter, a suction device used to collect insects. Aspirator (pump) , a device producing vacuum by the Venturi effect in a constricted stream of fluid. 2  Aspirator (entomology) , also known as pooter, a suction device used to collect insects.