A nurse is preparing to administer morphine 0.3 mg/kg PO to a client who weighs 99 lb.
Available is morphine oral solution 4 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["3.4 "]
Given:
- Desired dose of morphine: 0.3 mg/kg
- Client's weight: 99 lb
- Available strength of morphine oral solution: 4 mg/mL
First convert the client's weight from pounds to kilograms: 99 lb ÷ 2.20462 = 44.91 kg (rounded to the nearest hundredth)
The desired dose of morphine:
Desired dose = Client's weight × Dose per kg Desired dose = 44.91 kg × 0.3 mg/kg
Desired dose ≈ 13.473 mg
The milliliters of morphine oral solution this corresponds to:
Volume (mL) = Desired dose / Concentration Volume (mL) = 13.473 mg / 4 mg/mL Volume (mL) ≈ 3.37 mL
So, the nurse should administer approximately 3.4 mL of morphine oral solution.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Dose/strength - The prescription should specify the amount or concentration of the medication to be applied.
B. Time/frequency - The prescription already includes the time/frequency: "twice a day."
C. Medication name - The prescription already includes the medication name: "fluocinolone cream."
D. Route - The prescription already specifies the route: "apply topically."
Correct Answer is ["1.8"]
Explanation
Given:
- Desired dose of gentamicin: 1 mg/kg
- Client's weight: 154 lb
- Available strength of gentamicin solution: 40 mg/mL
First, convert the client's weight from pounds to kilograms:
154 lb ÷ 2.2= 70kg
Now, calculate the desired dose of gentamicin:
Desired dose = Dosage per kg × Weight Desired dose = 1 mg/kg × 670 kg Desired dose = 70 mg
Now, find out how many milliliters of gentamicin correspond to this dose: Volume (mL) = Desired dose / Concentration
Volume (mL) = 70 mg / 40 mg/mL Volume (mL) ≈ 1.75mL
rounded off to the nearest tenths= 1.8ml
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