A primary healthcare provider prescribes 2 mg/kg of pyrimethamine to a child with severe drooling. A nurse finds that the child weighs 44 lbs. Upon seeing the drug label, the nurse finds that 5 mL of medication contains 1 mg of the drug.
What should the nurse do to provide safe medication to the child?

To find the volume of fluid that will be left at 10:00 am, you need to calculate the following:

- The time elapsed in minutes from 8:45 am to 10:00 am using the formula: Time elapsed (min) = End time (min) - Start time (min)
- The volume of fluid infused in milliliters (mL) during the time elapsed using the formula: Volume infused (mL) = Flow rate (mL/min) x Time elapsed (min)
- The volume of fluid left in milliliters (mL) at 10:00 am using the formula: Volume left (mL) = Initial volume (mL) - Volume infused (mL)

First, use the formula for time elapsed to find how many minutes have passed from 8:45 am to 10:00 am:

Time elapsed (min) = End time (min) - Start time (min)

Since the end time is 10:00 am and the start time is 8:45 am, plug in these values into the formula:

Time elapsed (min) = 600 min - 525 min

Simplify and solve for the time elapsed:

Time elapsed (min) = 75 min

Next, use the formula for volume infused to find the amount of fluid infused in milliliters during the time elapsed:

Volume infused (mL) = Flow rate (mL/min) x Time elapsed (min)

Since the flow rate is 2 mL/min and the time elapsed is 75 min, plug in these values into the formula:

Volume infused (mL) = 2 mL/min x 75 min

Simplify and solve for the volume infused:

Volume infused (mL) = 150 mL

Then, use the formula for volume left to find the amount of fluid left in milliliters at 10:00 am:

Volume left (mL) = Initial volume (mL) - Volume infused (mL)

Since the initial volume is 1500 mL and the volume infused is 150 mL, plug in these values into the formula:

Volume left (mL) = 1500 mL - 150 mL

Simplify and solve for the volume left:

Volume left (mL) = 1350 mL

Therefore, the volume of fluid that will be left at 10:00 am is **1350 mL**.

the correct rate to administer the maintenance dose is 50 mL/hr.

Step 1: Determine the concentration of magnesium sulfate in the solution.

• There are 40 grams of magnesium sulfate in 1 liter of solution.
• 1 liter = 1000 mL.

Step 2: Calculate the concentration in grams per mL.

• 40 grams ÷ 1000 mL = 0.04 grams per mL.
• Result: 0.04 grams per mL.

Step 3: Determine the required dose per hour.

• The physician ordered 2 grams per hour.

Step 4: Calculate the volume of solution needed to provide 2 grams of magnesium sulfate.

• Required dose (2 grams) ÷ concentration (0.04 grams per mL) = volume in mL.
• 2 grams ÷ 0.04 grams per mL = 50 mL.
• Result: 50 mL.

• The calculated rate is 50 mL/hr.

the correct rate to administer the maintenance dose is 50 mL/hr.