A nurse is preparing to administer methylnaltrexone 12 mg subcutaneously to a client who has opioid-induced constipation. Available is methylnaltrexone 8 mg/0.4 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 ["0.6"]
Step 1: Determine the dosage available per mL.
- Available dosage is 8 mg in 0.4 mL.
- Calculation: 8 mg ÷ 0.4 mL = 20 mg/mL.
- Result: 20 mg/mL.
Step 2: Calculate the volume needed for 12 mg.
- Required dosage is 12 mg.
- Calculation: 12 mg ÷ 20 mg/mL = 0.6 mL.
- Result: 0.6 mL.
So, the nurse should administer 0.6 mL of methylnaltrexone.
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Related Questions
Correct Answer is ["2"]
Explanation
To calculate the amount of naloxone to administer, you can use the following formula:
Amount to administer (mL) = Total dose required (mg) / Concentration of drug (mg/mL)
Given:
Total dose required = 0.4 mg
Concentration of drug = 0.2 mg/mL
Let's calculate the amount to administer:
Amount to administer (mL) = 0.4 mg / 0.2 mg/mL
Now, perform the calculation:
Amount to administer (mL) = 2 mL
So, the nurse should administer 2 mL of naloxone intravenously as a bolus dose to the client.
Correct Answer is ["0.6"]
Explanation
Step 1: Determine the dosage available per mL.
- Available dosage is 8 mg in 0.4 mL.
- Calculation: 8 mg ÷ 0.4 mL = 20 mg/mL.
- Result: 20 mg/mL.
Step 2: Calculate the volume needed for 12 mg.
- Required dosage is 12 mg.
- Calculation: 12 mg ÷ 20 mg/mL = 0.6 mL.
- Result: 0.6 mL.
So, the nurse should administer 0.6 mL of methylnaltrexone.
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