BSN215 Exam 4 Actual Exam Style V3 |
BSN 215 HESI RN Specialty Dosage
Calculation | Nightingale
1. A patient is prescribed 1,000 mL of 0.9% Normal Saline to infuse over 8 hours. The drop
factor is 15 gtt/mL. At what rate should the nurse set the IV in drops per minute?
A. 21 gtt/min
B. 31 gtt/min
C. 42 gtt/min
D. 125 gtt/min
Answer: B
Rationale: To find the drops per minute, first determine the total volume of 1,000 mL and
the total time in minutes, which is 480 minutes. Multiply the total volume by the drop
factor of 15 and then divide by the total minutes. The resulting calculation is 15,000
divided by 480, which equals 31.25, rounded to 31 gtt/min.
2. A child weighing 44 lbs is prescribed Cefazolin 25 mg/kg IV every 8 hours. How many
milligrams should the nurse administer per dose?
A. 250 mg
B. 1,100 mg
C. 500 mg
,D. 1,000 mg
Answer: C
Rationale: First, convert the weight from pounds to kilograms by dividing 44 by 2.2, which
equals 20 kg. Then, multiply the weight in kilograms by the dose of 25 mg/kg to find the
amount per dose. The calculation results in 20 kg times 25 mg, which equals exactly 500
mg per dose.
3. An IV of Heparin is infusing at 22 mL/hr. The concentration is 25,000 units in 500 mL of 5%
Dextrose. How many units per hour is the patient receiving?
A. 500 units/hr
B. 1,200 units/hr
C. 1,100 units/hr
D. 1,050 units/hr
Answer: C
Rationale: To calculate the units per hour, first determine the concentration of units per
mL by dividing 25,000 units by 500 mL, resulting in 50 units/mL. Next, multiply this
concentration by the infusion rate of 22 mL/hr. The final calculation of 50 times 22 gives
the result of 1,100 units per hour.
4. The physician orders a Dopamine drip at 5 mcg/kg/min for a patient weighing 176 lbs. The
concentration is 400 mg in 250 mL D5W. What is the infusion rate in mL/hr?
A. 10 mL/hr
, B. 20 mL/hr
C. 15 mL/hr
D. 25 mL/hr
Answer: C
Rationale: Start by converting the weight to kilograms, which is 176 divided by 2.2,
equaling 80 kg. Then, calculate the total mcg/min by multiplying 5 mcg by 80 kg, resulting
in 400 mcg/min, and convert this to mg/hr. Finally, use the concentration of 1.6 mg/mL to
find the mL/hr rate, which is 24 mg/hr divided by 1.6, equaling 15 mL/hr.
5. A healthcare provider orders 500 mg of an antibiotic to be reconstituted with 4.8 mL of
diluent to yield a final concentration of 100 mg/mL. How many mL should the nurse
administer?
A. 0.5 mL
B. 5 mL
C. 4.8 mL
D. 1 mL
Answer: B
Rationale: The nurse must identify the desired dose of 500 mg and the concentration
available after reconstitution, which is 100 mg/mL. By dividing the desired dose of 500 mg
BSN 215 HESI RN Specialty Dosage
Calculation | Nightingale
1. A patient is prescribed 1,000 mL of 0.9% Normal Saline to infuse over 8 hours. The drop
factor is 15 gtt/mL. At what rate should the nurse set the IV in drops per minute?
A. 21 gtt/min
B. 31 gtt/min
C. 42 gtt/min
D. 125 gtt/min
Answer: B
Rationale: To find the drops per minute, first determine the total volume of 1,000 mL and
the total time in minutes, which is 480 minutes. Multiply the total volume by the drop
factor of 15 and then divide by the total minutes. The resulting calculation is 15,000
divided by 480, which equals 31.25, rounded to 31 gtt/min.
2. A child weighing 44 lbs is prescribed Cefazolin 25 mg/kg IV every 8 hours. How many
milligrams should the nurse administer per dose?
A. 250 mg
B. 1,100 mg
C. 500 mg
,D. 1,000 mg
Answer: C
Rationale: First, convert the weight from pounds to kilograms by dividing 44 by 2.2, which
equals 20 kg. Then, multiply the weight in kilograms by the dose of 25 mg/kg to find the
amount per dose. The calculation results in 20 kg times 25 mg, which equals exactly 500
mg per dose.
3. An IV of Heparin is infusing at 22 mL/hr. The concentration is 25,000 units in 500 mL of 5%
Dextrose. How many units per hour is the patient receiving?
A. 500 units/hr
B. 1,200 units/hr
C. 1,100 units/hr
D. 1,050 units/hr
Answer: C
Rationale: To calculate the units per hour, first determine the concentration of units per
mL by dividing 25,000 units by 500 mL, resulting in 50 units/mL. Next, multiply this
concentration by the infusion rate of 22 mL/hr. The final calculation of 50 times 22 gives
the result of 1,100 units per hour.
4. The physician orders a Dopamine drip at 5 mcg/kg/min for a patient weighing 176 lbs. The
concentration is 400 mg in 250 mL D5W. What is the infusion rate in mL/hr?
A. 10 mL/hr
, B. 20 mL/hr
C. 15 mL/hr
D. 25 mL/hr
Answer: C
Rationale: Start by converting the weight to kilograms, which is 176 divided by 2.2,
equaling 80 kg. Then, calculate the total mcg/min by multiplying 5 mcg by 80 kg, resulting
in 400 mcg/min, and convert this to mg/hr. Finally, use the concentration of 1.6 mg/mL to
find the mL/hr rate, which is 24 mg/hr divided by 1.6, equaling 15 mL/hr.
5. A healthcare provider orders 500 mg of an antibiotic to be reconstituted with 4.8 mL of
diluent to yield a final concentration of 100 mg/mL. How many mL should the nurse
administer?
A. 0.5 mL
B. 5 mL
C. 4.8 mL
D. 1 mL
Answer: B
Rationale: The nurse must identify the desired dose of 500 mg and the concentration
available after reconstitution, which is 100 mg/mL. By dividing the desired dose of 500 mg
