A patient receives an IV of 20 000 units of heparin in a 100.0 mL bag over 45.0 min. If the pump is calibrated to 15.0 drops/mL, what is the drops per minute rate?
The problem asks for the pump flow rate where rate is expressed in volume/time. Set up the rate expression and then use dimensional analysis to convert mL into drops.
mL /45.0 min x 15.0 drops/ 1 mL = 33.3 drops/min