A client who weighs 165 pounds receives a prescription for lorazepam 0.05 mg/kg per IM 2 hours before a scheduled procedure. The medication is available in 4 mg/mL vial. How many mg should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["3.7"]
Given:
Ordered dose of Lorazepam: 0.05 mg/kg
Patient weight: 165 pounds
Concentration of Lorazepam: 4 mg/mL
Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 165 lbs x 0.453592 kg/lb = 74.8423 kg
Step 2: Calculate the total dose of Lorazepam:
Total dose (mg) = Ordered dose (mg/kg) x Patient weight (kg)
Total dose (mg) = 0.05 mg/kg x 74.8423 kg
Total dose (mg) = 3.742115 mg
Step 3: Round to the nearest tenth:
Total dose (mg) ≈ 3.7 mg
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.5"]
Explanation
Given:
Ordered dose of Ketorolac: 45 mg IM every 6 hours
Concentration of Ketorolac: 30 mg/mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
45 mg / Volume = 30 mg/mL
Step 3: Solve for the unknown volume:
Volume = 45 mg / (30 mg/mL)
Volume = 45 mg x (1 mL / 30 mg)
Volume = 1.5 mL
Correct Answer is ["17"]
Explanation
Given:
Volume of fluid: 50 mL
Infusion time: 30 minutes
Drop factor: 10 gtt/mL
Formula:
Flow rate (gtt/min) = (Volume (mL) / Time (min)) x Drop factor (gtt/mL)
Step 1: Calculate the infusion rate in mL/min:
Infusion rate (mL/min) = Volume (mL) / Time (min)
Infusion rate (mL/min) = 50 mL / 30 min
Infusion rate (mL/min) = 1.67 mL/min
Step 2: Calculate the flow rate in gtt/min:
Flow rate (gtt/min) = Infusion rate (mL/min) x Drop factor (gtt/mL)
Flow rate (gtt/min) = 1.67 mL/min x 10 gtt/mL
Flow rate (gtt/min) = 16.7 gtt/min
Step 3: Round to the nearest whole number:
Flow rate (gtt/min) ≈ 17 gtt/min
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