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The healthcare provider prescribes lorazepam 50 mcg/kg IM two hours before a scheduled procedure for a client who weighs 74 kg. The medication is "Available in 2mg/mL vial." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation

The Correct Answer is ["1.9"]

Given:

Ordered dose of Lorazepam: 50 mcg/kg

Patient weight: 74 kg

Concentration of Lorazepam: 2 mg/mL

Step 1: Calculate the total dose of Lorazepam:

Total dose (mcg) = Ordered dose (mcg/kg) x Patient weight (kg)

Total dose (mcg) = 50 mcg/kg x 74 kg

Total dose (mcg) = 3700 mcg

Step 2: Convert mcg to mg:

Total dose (mg) = Total dose (mcg) / 1000 mcg/mg

Total dose (mg) = 3700 mcg / 1000 mcg/mg

Total dose (mg) = 3.7 mg

Step 3: Calculate the volume to be administered:

Volume (mL) = Total dose (mg) / Concentration (mg/mL)

Volume (mL) = 3.7 mg / 2 mg/mL

Volume (mL) = 1.85 mL

Step 4: Round to the nearest tenth:

Volume (mL) ≈ 1.9 mL

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Free Nursing Study Resources

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

Correct Answer is ["0.5"]

Explanation

Given:

Ordered dose of interferon beta-1b: 0.125 mg

Vial strength: 0.3 mg

Reconstitution volume: 1.2 mL

Step 1: Determine the concentration of the reconstituted solution:

Concentration (mg/mL) = Total amount of medication (mg) / Volume of solution (mL)

Concentration (mg/mL) = 0.3 mg / 1.2 mL

Concentration (mg/mL) = 0.25 mg/mL

Step 2: Calculate the volume to be administered:

Volume (mL) = Desired dose (mg) / Concentration (mg/mL)

Volume (mL) = 0.125 mg / 0.25 mg/mL

Volume (mL) = 0.5 mL

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The healthcare provider prescribes lorazepam 50 mcg/kg IM two hours before a scheduled procedure for a client who weighs 74 kg. The medication is "Available in 2mg/mL vial." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is ["33"]

Explanation

Correct Answer is ["0.5"]

Explanation

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