A 500 mL IV fluid bag must run over 4 hours through tubing calibrated at 20 drops per millilitre. What manual drip rate is required?
Correct answer: B. 42 drops per minute
- A. 21 drops per minute
- B. 42 drops per minute
- C. 63 drops per minute
- D. 84 drops per minute
Explanation
The calculation is 500 mL × 20 drops/mL ÷ 240 minutes = 41.7 drops/minute, rounded to 42 drops/minute. The rate must be checked against the prescription and reassessed during administration.
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About IV Fluids and Blood Transfusion
IV therapy covers crystalloid and colloid fluids, electrolyte replacement, maintenance and resuscitation fluids, infusion equipment and complications such as infiltration, phlebitis, fluid overload and electrolyte imbalance. Blood transfusion content includes compatibility, cross matching, administration precautions and recognition of haemolytic, febrile and allergic reactions, distinct from ordinary IV fluid reactions.
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