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Pharmacological and Parenteral Therapies · Calculation · Take action

1,000 mL of lactated Ringer's is to infuse over 10 hours by gravity. The drop factor is 20 gtt/mL. How many drops per minute should the nurse regulate?

gtt/min

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Answer: 33 gtt/min

(1,000 mL × 20 gtt/mL) ÷ 600 min = 20,000 ÷ 600 = 33.3, rounded to 33 gtt/min.

Source: Potter & Perry. Fundamentals of Nursing, 12th ed. (gravity drip rate)

Keep practicing Pharmacological and Parenteral Therapies

This question is one of 182 Pharmacological and Parenteral Therapies items in NCLEXSim. On the NCLEX-RN, this category makes up 13–19% of the exam.

Study tip
  • Learn high-alert drugs by their hold parameters and antidotes: digoxin, warfarin (vitamin K), heparin (protamine), opioids (naloxone), insulin, potassium.
  • Do 10 dosage calculations a day: tablets, liquids, mL/hr, gtt/min, mg/kg, and units/hr. Convert units first, round last.

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