Formula sheets, the key method steps for every topic and 6 practice problems, with full solutions at the back.
A pregnant woman takes an iron supplement. Which instruction improves its absorption?
A woman has just been diagnosed with gestational diabetes at 26 weeks. What is the usual first step in management?
A patient weighs 90 kg and is prescribed 10 mg/kg as a single dose. Find the dose D in mg.
A child weighing 28 kg is prescribed 5 mg/kg per dose of an oral suspension that contains 125 mg in 5 mL. What volume V do you give?
Infuse 250 mL over 5 hours with a giving set of 20 gtt/mL. Find the drip rate R in drops per minute. Round to the nearest whole number.
A drip runs at 40 gtt/min through a set of 15 gtt/mL. There are 750 mL left in the bag. How many hours t until it is empty? Round to one decimal place.
Answer: D · Take it with orange juice rather than with tea
Vitamin C increases iron absorption, while milk, calcium, antacids, tea and coffee reduce it. She should also expect dark stools and may need advice on preventing constipation.
Answer: B · Nutrition advice, physical activity and blood glucose monitoring, with medication if targets are not met
First-line management is medical nutrition therapy, activity and self-monitoring of glucose. If targets are not met, medication such as insulin is added. Glucose is tested again after birth because the risk of type 2 diabetes is raised.
Answer: D = 900 mg
Dose calculation: the amount to give equals what is prescribed divided by what you have, times the quantity it comes in: amount = (desired dose/stock strength) × stock volume. Always keep the units the same (convert g to mg, mg to mcg first) and check that the answer is sensible.
Answer: V = 5.6 mL
Dose calculation: the amount to give equals what is prescribed divided by what you have, times the quantity it comes in: amount = (desired dose/stock strength) × stock volume. Always keep the units the same (convert g to mg, mg to mcg first) and check that the answer is sensible.
Answer: R = 17 gtt/min
Infusion rates: a pump is set in mL/h = volume/time in hours. A gravity drip is counted in drops per minute: gtt/min = volume (mL) × drop factor (gtt/mL)/time (min). The drop factor is printed on the tubing package: macrodrip sets deliver 10, 15 or 20 gtt/mL (blood sets often 10 gtt/mL in the US, 15 in the UK) and microdrip sets 60 gtt/mL. Always use the drop factor the question or package gives.
At the bedside you round to the nearest whole drop: 17 gtt/min.
Answer: t = 4.7 h
Infusion rates: a pump is set in mL/h = volume/time in hours. A gravity drip is counted in drops per minute: gtt/min = volume (mL) × drop factor (gtt/mL)/time (min). The drop factor is printed on the tubing package: macrodrip sets deliver 10, 15 or 20 gtt/mL (blood sets often 10 gtt/mL in the US, 15 in the UK) and microdrip sets 60 gtt/mL. Always use the drop factor the question or package gives.
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