Part1.5: Dosage calculations Flashcards
Pharm
a very old system of measure that was specifically developed for use by apothecaries or pharmacists; it uses the minim as the basic unit of liquid measure and the grain as the basic unit of solid measure
apothecary system
a method of determining the correct drug dose for a child based on the known adult dose (assumes that the adult dose is based on a 150-lb person); it states
Clark rule
finding the equivalent values between two systems of measure
conversion
a method of determining a pediatric drug dose for a child younger than 2 years of age, based on the child’s age and the usual adult dose (assumes that an adult dose would be appropriate for a 12.5-year-old child); it states
Fried rule
the most widely used system of measure, based on the decimal system; all units in the system are determined as multiples of 10
Metric
an equation in which a ratio containing two known equivalent amounts is on one side and a ratio containing the amount desired to convert and its unknown equivalent is on the other side
ratio and proportion
a method for determining pediatric drug dose based on the child’s age and the usual adult dose; it states
Young rule
.A dose of 0.125 mg of digoxin was ordered for a patient who has been having trouble swallowing. The bottle of digoxin elixir reads 0.05 mg/mL. How much would you give?
a.5 mL
b.0.5 mL
c.2.5 mL
d.2 mL
The usual adult dose of diphenhydramine (Benadryl) is 50 mg. What would be the safe dose for a child weighing 27 lb?
a.0.9 mg
b.1.8 mg
c.9 mg
d.18 mg
An order is written for 700 mg of ampicillin PO. The drug is supplied in liquid form as 1 g/3.5 mL. How much of the liquid should be given?
a.5.25 mL
b.2.55 mL
c.6.25 mL
d.2.45 mL
An order is written for 1,000 mL of normal saline to be administered IV over 10 hours. The drop factor on the IV tubing states 15 drops/mL. What is the IV flow rate?
a.50 mL/h at 50 drops/min
b.100 mL/h at 25 drops/min
c.100 mL/h at 100 drops/min
d.100 mL/h at 15 drops/min
The average adult dose of meperidine is 75 mg. What dose would be appropriate for a 10-month-old infant?
a.50 mg
b.5 mg
c.25 mg
d.0.5 mg
6.A patient needs to take 0.75 g of tetracycline PO. The drug comes in 250-mg tablets. How many tablets should the patient take?
a.2 tablets
b.3 tablets
c.4 tablets
d.30 tablets
Aminophylline is supplied in a 500 mg/2.5 mL solution. How much would be given if an order were written for 100 mg of aminophylline IV?
a.5 mL
b.1.5 mL
c.2.5 mL
d.0.5 mL
Heparin 800 units is ordered for a patient. The heparin is supplied in a multidose vial that is labeled 10,000 units/mL. How many milliliters of heparin would be needed to treat this patient?
a.0.8 mL
b.0.08 mL
c.8 mL
d.0.4 mL
