1.14: End of Chapter Problems III
The following problems on metric prefixes and dosage calculations are to completed with unit 3.
Metric Prefixes
1. Give the abbreviation for each unit and define the abbreviation in terms of the base unit.
kiloliter
microsecond
decimeter
nanogram
kilometer
milligram
nanosecond
centiliter
2. Convert 81.2 g to kilograms following using the dimensional analysis. Show clearly conversion factors.
3. Convert 58.2 milliseconds (ms) to megaseconds (Ms).
4. Convert 47.66 mcg to dg using the factor label method.
5. Please complete the following conversions using dimensional analysis.
a. 5.67 mm to m
b. 5.67 nm to m
c. 0.3 cm to m
d. 1.5 km to mm
e. 24 mcg to mg
f. 15 dg to cg
g. 0.712 mg to kg
h. 412 kg to dg
Dosage Calculations II
Please set up your calculations using the dimensional analysis.
1. Neomycin is an antibiotic. A patient needs 2.5 grams of Neomycin sulfate. 500 mg tablets are available. How many tablets will you give to the patient?
2. Epinephrine is used to treat peanut allergies. A 5 year old patient needs an immediate treatment of 120 mcg of epinephrine. The solution is available in concentration of 0.50 mg/mL. Calculate the volume (mL) required for the patient?
3. The doctor’s order is 1.2 g of folic acid. Folic Acid is available as 800 mg per tablet. How many tablets should be taken?
4. The doctor’s order is 1 g of Calcium. What is on hand is Calcium as 500 mg per tablet. How many tablets should be taken?
5. Demerol is ordered 1.5mg/kg for a patient that is 220 lbs. Demerol is available as 50 mg per tablet. How many tablets should the nurse administer?
6. A doctor prescribes amoxicillin 30 mg/kg to a child weighing 73.5 lbs. Amoxicillin is available as 500 mg tablets. How many tablets should the nurse administer?
7. Vitamin C tablets can come in 500 mg tablets. How many of these tablets are needed to obtain 10 g of vitamin C?
8. A 175 lb patient is to undergo surgery and will be given an intravenous anesthetic. The safe dosage of anesthetic is up 12 mg/kg of body weight. Determine the mg of the dose of anesthetic that should be used. (2.205 lbs = 1 kg)
9. A drug dose of 1.5 mg/kg is ordered for a child weighing 70.4 lbs. How many mg of the drug should be administered? If the drug is available as 60 mg/2 mL. How many mL must the nurse administer?
10. The antiviral drug Stavudine is used for the treatment of AIDS. The daily recommended dosage of Stavudine is 1.0 mg/kg of body weight. How many grams of the drug should be administered to a 150 lb patient?
11. Tetracycline is an antibiotic used to mark polar bears. If 25 mg/kg is an effective dose, how much tetracycline is needed in grams to mark a 100 kg polar bear?
12. Ivermectine is used to treat dogs that have intestinal parasites. The effective dosage for this drug is 10.5 mcg/kg of body weight. How much ivermectin should be given to a 9.0 kg dog?
13. Chloroquine is used to treat malaria. Studies have shown that an effective dose for children is 3.5 mg/kg of body weight every 6 hours. If a child weighs 12 kg, how many milligram of this drug should be given in a 24 hour period?