A METHOD FOR ACCURATELY MEASURING THE RATE OF FLOW OF INTRAVENOUS FLUIDS

Abstract

The rotameter principle was used for the accurate measurement of the rate of flow of fluids. The rotameter is a small float within a tapered glass tube. The pressure drop across the float is constant. Increasing flow rates cause the float to take higher positions in the tube; and, thereby, provide greater flow areas. Rotameters calibrated for fluids of different sp. gr. are available. The range of the meter is between 5 and 50 ml./min. Quantities as low as 0.2 ml./min. can be measured accurately.