Medical Mathematics and Dosage Calculations Flashcards
7 cards from real RMA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Medical Mathematics and Dosage Calculations flashcards as text
The Roman numeral 'xv' written on a prescription represents which quantity?
Answer: 15
In Roman numerals, x = 10 and v = 5, so xv = 15.
A medication label reads 125 mg/5 mL. How many mL are needed to deliver a 250 mg dose?
Answer: 10 mL
(250 mg ÷ 125 mg) × 5 mL = 2 × 5 mL = 10 mL.
How many micrograms (mcg) are equal to 1 milligram (mg)?
Answer: 1,000 mcg
1 mg = 1,000 mcg; the prefix micro- means one-millionth, so there are 1,000 micrograms per milligram.
A physician orders heparin 2,500 units subcutaneously. Available is heparin 5,000 units/mL. How many mL should be given?
Answer: 0.5 mL
2,500 units ÷ 5,000 units/mL = 0.5 mL.
Which type of syringe is specifically calibrated for administering insulin?
Answer: U-100 insulin syringe
The U-100 insulin syringe is calibrated in units (100 units/mL) specifically for insulin administration.
The prescription abbreviation 'tid' indicates the medication should be taken how often?
Answer: Three times daily
'tid' is derived from the Latin 'ter in die,' meaning three times daily.
An IV bag contains 1,000 mL and must be infused over 8 hours. What is the hourly infusion rate?
Answer: 125 mL/hr
1,000 mL ÷ 8 hours = 125 mL/hr.