The patient is receiving nitroglycerin 55 mcg/min.
Available: Nitroglycerin in 5% Dextrose Injection 25 mg per 250 mL (100 mcg/mL)
What is the flow rate?
3 mL/hr
55 mL/hr
30 mL/hr
33 mL/hr
The Correct Answer is D
Convert the dosage to mcg per hour:
55 mcg/min × 60 min = 3300 mcg/hr
Determine the concentration of nitroglycerin available:
The concentration is 25 mg per 250 mL, which converts to 100 mcg/mL.
Calculate the flow rate in mL per hour using the dosage and concentration:
Flow rate (mL/hr)=(Dose (mcg/hr)/Concentration (mcg/mL))
(3300 mcg/hr100 mcg/mL)=33 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Given:
Ordered volume of Isomil: 12 oz
Step 1: Determine the volume of Isomil needed for 1/4 strength:
Volume of Isomil for 1/4 strength = Original volume x (1/4)
Volume of Isomil for 1/4 strength = 12 oz x (1/4)
Volume of Isomil for 1/4 strength = 3 oz
Step 2: Calculate the volume of solvent (water) needed:
Solvent volume = Original volume - Volume of Isomil for 1/4 strength
Solvent volume = 12 oz - 3 oz
Solvent volume = 9 oz
Step 3: Convert ounces to milliliters:
1 oz = 29.5735 mL
Solvent volume (mL) = 9 oz x 29.5735 mL/oz
Solvent volume (mL) = 266.1615 mL
Step 4: Round to the nearest whole number:
Solvent volume (mL) ≈ 270 mL
Correct Answer is D
Explanation
Given:
Total Heparin in solution: 25,000 units
Volume of solution: 250 mL
Infusion rate: 11 mL/hr
Step 1: Calculate the concentration of Heparin in the solution:
Concentration (units/mL) = Total Heparin (units) / Volume of solution (mL)
Concentration (units/mL) = 25,000 units / 250 mL
Concentration (units/mL) = 100 units/mL
Step 2: Calculate the infusion rate in units/hr:
Infusion rate (units/hr) = Infusion rate (mL/hr) x Concentration (units/mL)
Infusion rate (units/hr) = 11 mL/hr x 100 units/mL
Infusion rate (units/hr) = 1100 units/hr
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