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A client who has pre-eclampsia receives a prescription for an IV infusion of 0.9% normal saline with magnesium sulfate 4 gram/250 ml to be infused at a rate of 125 ml/hour. The nurse should administer how many mg/hour of magnesium sulfate? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

Answer and Explanation

The Correct Answer is ["2000"]

To calculate the infusion rate of magnesium sulfate, we'll follow these steps:

1. Calculate the concentration of magnesium sulfate in the IV solution:

Magnesium Sulfate Concentration = Magnesium Sulfate (g) / Solution Volume (mL)

Magnesium Sulfate Concentration = 4 grams / 250 mL

Magnesium Sulfate Concentration = 16 mg/mL

2. Calculate the magnesium sulfate infusion rate in mg/hour:

Magnesium Sulfate Infusion Rate = Infusion Rate (mL/hour) x Magnesium Sulfate Concentration (mg/mL)

Magnesium Sulfate Infusion Rate = 125 mL/hour x 16 mg/mL

Magnesium Sulfate Infusion Rate = 2000 mg/hour

Therefore, the nurse should administer 2000 mg/hour of magnesium sulfate.

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Correct Answer is ["3.2"]

Explanation

To calculate the volume of tobramycin sulfate to be administered, we can use the following formula:

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

First, let's convert the desired dose from grams to milligrams:

0.128 grams x 1000 mg/gram = 128 mg

Then, plug in the values into the formula:

Volume (mL) = 128 mg / 40 mg/mL

Calculating the result:

Volume (mL) = 3.2 mL

Therefore, the nurse should administer 3.2 mL of tobramycin sulfate.

Correct Answer is ["4.9"]

Explanation

Step 1: Calculate the concentration of dopamine in the IV solution:

400 mg / 250 mL = 1.6 mg/mL

Step 2: Calculate the infusion rate in mL/minute:

12 mL/hour x (1 hour / 60 minutes) = 0.2 mL/minute

Step 3: Calculate the dopamine infusion rate in mg/minute:

0.2 mL/minute x 1.6 mg/mL = 0.32 mg/minute

Step 4: Convert milligrams to micro-grams:

0.32 mg x (1000 mcg / 1 mg) = 320 mcg/minute

Step 5: Calculate the dopamine infusion rate in mcg/kg/minute:

320 mcg/minute / 65 kg ≈ 4.9 mcg/kg/minute

Therefore, the client is receiving approximately 4.9 mcg/kg/minute of dopamine.

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Naxlex Comprehensive Predictor Exams

A client receives a prescription for tobramycin sulfate (Nebcin) 0.128 grams IV every 8 hours. Tobramycin is available in liquid concentration of 40 mg/ml. How many ml should the nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Correct Answer is ["3.2"]

Explanation

A client who weighs 65 kg is receiving an infusion of Dextrose 5% in Water (DW) 250 ml with dopamine 400 mg at 12 ml/hour. How many mcg/kg/minute is the client receiving? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Correct Answer is ["4.9"]

Explanation

A client is receiving Dextrose 5% in Water (DW) 1,000 ml at 75 ml/hour. The nurse hangs the bag of IV fluids at 0300. At what time, based on the 24-hour clock, should the infusion be completed?

The nurse is preparing to administer vancomycin (Vancocin) 750 mg in 250 ml of Dextrose 5% in Water (D,W) over 75 minutes. The secondary infusion pump should be programmed to administer how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.)

The health-care provider prescribes trimethoprim-sulfamethoxazole (Bactrim-DS Oral Suspension) 120 mg BID for a child with bronchitis. The Bactrim bottle is labeled "200 mg/5ml." How many ml should the nurse administer at each dose? (Enter the numeric value, whole number, only.)

The health-care provider prescribes penicillin 700,000 Units IM daily. The available vial is labeled, Penicillin 500,000 Units/ml. How many milliliters should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

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The health-care provider prescribes the diuretic metolazone (Zaroxolyn) 7.5 mg PO. Zaroxolyn is available in 5 mg tablets. How many tablets should the nurse plan to administer?