Free AAMA Certified Medical Assistant (CMA) Practice Question

To determine the correct volume to administer, one must first convert micrograms to milligrams, since the stock solution is measured in milligrams. There are 1,000 micrograms in a milligram. Therefore, 250 micrograms is equivalent to 0.25 milligrams (250 ÷ 1,000 = 0.25). The stock solution has 0.5 milligrams in each milliliter, so to administer 0.25 milligrams, the volume needed is 0.5 milliliters (0.25 mg ÷ 0.5 mg per ml = 0.5 ml). This conversion is critical to ensure the patient receives the correct dose.