A nurse is preparing to administer lorazepam 0.05 mg/kg IM to a client who weighs 132 lb. Available is lorazepam solution 2mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tent. Use a leading zero if it applies. Do not use a trailing zero)
The Correct Answer is ["1.5"]
Convert the Client's Weight from Pounds to Kilograms:
1 kg = 2.205 lbs
Weight in kg = 132 lbs / 2.205 lbs/kg
Weight in kg ≈ 59.86 kg
Calculate the Total Dose of Lorazepam Needed:
Dose = 0.05 mg/kg x 59.86 kg
Dose ≈ 2.993 mg
Calculate the Volume of Lorazepam to Administer:
Available concentration = 2 mg/mL
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
Volume (mL) = 2.993 mg / 2 mg/mL
Volume (mL) ≈ 1.4965 mL
Round to the Nearest Tenth:
1.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["60"]
Explanation
Understanding the Problem
Order: Lidocaine 4 mg/min
Available Solution: Lidocaine 1 g in 250 mL of D5W
Desired Rate: mL/hr
Step 1: Convert Grams (g) to Milligrams (mg)
1 g = 1000 mg
Available Lidocaine: 1 g x 1000 mg/g = 1000 mg
Step 2: Determine the Concentration of the Lidocaine Solution
Available Lidocaine: 1000 mg
Solution Volume: 250 mL
Concentration: 1000 mg / 250 mL = 4 mg/mL
Step 3: Calculate the Infusion Rate in mL/min
Ordered Dose: 4 mg/min
Concentration: 4 mg/mL
Infusion Rate: 4 mg/min / 4 mg/mL = 1 mL/min
Step 4: Convert Infusion Rate to mL/hr
Infusion Rate: 1 mL/min
Minutes in an Hour: 60 min
Infusion Rate in mL/hr: 1 mL/min x 60 min/hr = 60 mL/hr
Step 5: Round to the Nearest Whole Number
The calculated rate is 60 mL/hr, which is already a whole number.
Final Answer: 60 mL/hr
Correct Answer is ["3"]
Explanation
Understanding the Problem
Order: Metoclopramide 15 mg IV
Available Solution: Metoclopramide 5 mg/mL
Desired Dose: mL to administer
Step 1: Set Up the Calculation
We need to find the volume (in mL) that contains the ordered dose (15 mg). We can do this by dividing the ordered dose by the concentration of the available solution:
Volume (mL) = Ordered Dose (mg) / Concentration (mg/mL)
Step 2: Perform the Calculation
Ordered Dose: 15 mg
Concentration: 5 mg/mL
Volume: 15 mg / 5 mg/mL = 3 mL
Step 3: Round to the Nearest Whole Number
The result is 3 mL, which is already a whole number.
Answer: 3 mL
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