A nurse is preparing to administer nalaxone 0.4 mg IV bolus to a client who is experiencing opioid toxicity. Available is naloxone injection 1 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it apples. Do not use a trailing zero.)
The Correct Answer is ["0.4"]
Identify the Desired Dose and Available Concentration:
Desired Dose: 0.4 mg of naloxone
Available Concentration: 1 mg/mL (This means there is 1 mg of naloxone in every 1 mL of solution)
Set up the Calculation:
We need to find the volume (in mL) that contains the desired dose of 0.4 mg.
We can use the following formula:
Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL)
Plug in the Values and Calculate:
Volume (mL) = 0.4 mg / 1 mg/mL
Volume (mL) = 0.4 mL
Round to the Nearest Tenth (if necessary):
0.4 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["34"]
Explanation
Convert the Client's Weight from Pounds to Kilograms:
1 kg = 2.205 lbs
Weight in kg = 250 lbs / 2.205 lbs/kg
Weight in kg ≈ 113.38 kg
Calculate the Dobutamine Dose in mcg/min:
Dose = 5 mcg/kg/min x 113.38 kg
Dose ≈ 566.9 mcg/min
Convert the Dobutamine Dose from mcg/min to mg/min:
1 mg = 1000 mcg
Dose in mg/min = 566.9 mcg/min / 1000 mcg/mg
Dose in mg/min ≈ 0.5669 mg/min
Calculate the Dobutamine Dose in mg/hr:
Dose in mg/hr = 0.5669 mg/min x 60 min/hr
Dose in mg/hr ≈ 34.014 mg/hr
Calculate the Infusion Rate in mL/hr:
Available concentration = 250 mg / 250 mL = 1 mg/mL
Infusion Rate (mL/hr) = Dose in mg/hr / Concentration (mg/mL)
Infusion Rate (mL/hr) = 34.014 mg/hr / 1 mg/mL
Infusion Rate (mL/hr) ≈ 34.014 mL/hr
Round to the Nearest Whole Number:
34 mL/hr
Correct Answer is A
Explanation
A) Digoxin 25 mcg/kg via IV bolus every 8 hr x 2 doses: This prescription should be clarified. Digoxin is typically prescribed in micrograms (mcg), but the dose of 25 mcg/kg is very high and could lead to toxicity. For a client with heart failure, the usual dosage for digoxin is 0.125–0.25 mg daily, not 25 mcg/kg per dose, which is excessive and potentially dangerous. Therefore, this order should be clarified with the provider.
B) Dobutamine 15 mcg/kg via continuous IV infusion: This is an appropriate dose for dobutamine, which is commonly used in heart failure for its inotropic effects. Dobutamine is typically dosed between 2–20 mcg/kg/min for continuous IV infusion, so 15 mcg/kg/min is within a safe range.
C) Bumetanide 0.1 mg/kg via IV bolus every 12 hr: Bumetanide is a loop diuretic used in heart failure, and the prescribed dose of 0.1 mg/kg every 12 hours is an appropriate dosing regimen for this medication. It is within the typical dosing range, and the interval is also reasonable for managing fluid overload in heart failure.
D) Dextrose 5% in 0.45% sodium chloride with 20 mEq KCl via continuous IV infusion at 50 mL/hr: This IV fluid prescription is generally appropriate. The combination of dextrose and sodium chloride with potassium is commonly used to maintain hydration and electrolyte balance in clients, particularly in the context of heart failure management. The infusion rate of 50 mL/hr is a typical rate for continuous IV infusions.
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