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 ["6.25"]
Explanation
Given:
Ordered dose of erythromycin: 250 mg
Concentration of erythromycin suspension: 200 mg/5 mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
250 mg / Volume = 200 mg/5 mL
Step 3: Solve for the unknown volume:
Volume = 250 mg / (200 mg/5 mL)
Volume = 250 mg x (5 mL / 200 mg)
Volume = 6.25 mL
Correct Answer is ["33"]
Explanation
Rationale:
Given:
Total dose of Potassium Chloride: 30 mEq
Volume of solution: 100 mL
Infusion rate: 10 mEq/hour
Step 1: Determine the concentration of Potassium Chloride in the solution:
Concentration (mEq/mL) = Total Potassium Chloride (mEq) / Volume of solution (mL)
Concentration (mEq/mL) = 30 mEq / 100 mL
Concentration (mEq/mL) = 0.3 mEq/mL
Step 2: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Infusion rate (mEq/hr) / Concentration (mEq/mL)
Infusion rate (mL/hr) = 10 mEq/hr / 0.3 mEq/mL
Infusion rate (mL/hr) = 33.33 mL/hr
Step 3: Round to the nearest whole number:
Infusion rate (mL/hr) ≈ 33 mL/hr
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