A client receives a prescription for fentanyl 100 mcg IV every 1 to 2 hours PRN for severe pain. The medication is available in 0.05 mg/mL vial. How many ml should the nurse administer? (Enter numerical value only.)
The Correct Answer is ["2"]
Given:
Ordered dose of Fentanyl: 100 mcg
Concentration of Fentanyl: 0.05 mg/mL
Step 1: Convert mcg to mg:
Ordered dose (mg) = Ordered dose (mcg) / 1000 mcg/mg
Ordered dose (mg) = 100 mcg / 1000 mcg/mg
Ordered dose (mg) = 0.1 mg
Step 2: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 3: Substitute the values:
0.1 mg / Volume = 0.05 mg/mL
Step 4: Solve for the unknown volume:
Volume = 0.1 mg / (0.05 mg/mL)
Volume = 0.1 mg x (1 mL / 0.05 mg)
Volume = 2 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
Given:
Ordered dose of Fentanyl: 100 mcg
Concentration of Fentanyl: 0.05 mg/mL
Step 1: Convert mcg to mg:
Ordered dose (mg) = Ordered dose (mcg) / 1000 mcg/mg
Ordered dose (mg) = 100 mcg / 1000 mcg/mg
Ordered dose (mg) = 0.1 mg
Step 2: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 3: Substitute the values:
0.1 mg / Volume = 0.05 mg/mL
Step 4: Solve for the unknown volume:
Volume = 0.1 mg / (0.05 mg/mL)
Volume = 0.1 mg x (1 mL / 0.05 mg)
Volume = 2 mL
Correct Answer is ["42"]
Explanation
Given:
Volume of fluid: 1 liter = 1000 mL
Infusion time: 8 hours
Drop factor: 20 gtt/mL
Formula:
Flow rate (gtt/min) = (Volume (mL) / Time (hr)) x Drop factor (gtt/mL) / 60 min/hr
Step 1: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Volume (mL) / Time (hr)
Infusion rate (mL/hr) = 1000 mL / 8 hr
Infusion rate (mL/hr) = 125 mL/hr
Step 2: Calculate the flow rate in gtt/min:
Flow rate (gtt/min) = (Infusion rate (mL/hr) x Drop factor (gtt/mL)) / 60 min/hr
Flow rate (gtt/min) = (125 mL/hr x 20 gtt/mL) / 60 min/hr
Flow rate (gtt/min) = 2500 gtt/hr / 60 min/hr
Flow rate (gtt/min) = 41.667 gtt/min
Step 3: Round to the nearest whole number:
Flow rate (gtt/min) ≈ 42 gtt/min
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