An infusion set delivers 20 drops per ml. How many drops per minute are needed to give 500 ml in 240 minutes?
Answer and explanation
Correct answer: C. 41.7 drops/min
- Step 1: Drops per minute = volume x drops per ml / minutes. Step 2. 500 x 20 / 240 = 41.7. Answer: 41.7 drops/min. Why not the others: 6000 drops/min: the drop factor was used as a divisor. 2.1 drops/min: this is ml per minute, the drop factor was left out. 83.3 drops/min: the result was doubled.
Practise more Dosage, Units and Rates.
Free questions with an explanation for every one, and full timed TMS (Test fĂŒr Medizinische StudiengĂ€nge) practice mock tests.
More Dosage, Units and Rates questions
- How many milligrams are in 0.25 g?
- A patient weighs 70 kg and the dose is 5 mg per kg. What is the dose?
- An infusion of 500 mL must run for 4 hours. What is the rate in mL per hour?
- A solution contains 20 mg of a drug per mL. How many mL give a dose of 150 mg?
- A 2 percent (w/v) solution contains 2 g per 100 mL. How much solute is in 250 mL?
- A 10 percent solution of 200 mL is diluted with water to a 4 percent solution. How much water must be added?