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The nurse is initiating a prescription for IV dextrose 2.5% in 0.45% sodium chloride (D, 0.5% NS) at 45 mL/hour for a child with dehydration. The nurse attaches a volume-control administration set with a microdrop chamber to the bag of solution. How many microdrops/minute should the nurse regulate the infusion? (Enter the numerical value only. If rounding is required, round to the nearest whole number.)
Answer and Explanation

The Correct Answer is ["45"]

The infusion rate is given as 45 mL/hour. 

We know that 1 hour is 60 minutes, so we can convert the rate to mL/minute:

Rate in mL/minute = Rate in mL/hour   /divide by   60minutes/hour 

​= 45mL/hour   /  60minutes/hour  ​≈ 0.75mL/minute

The volume-control administration set with a microdrop chamber delivers 60 microdrops/mL. 

Therefore, the rate in microdrops/minute would be:

Rate in microdrops/minute = Rate in mL/minute×Drops per mL = 0.75mL/minute × 60microdrops/mL = 45microdrops/minute

However, the question asks to round the answer to the nearest whole number. 

So, the nurse should regulate the infusion to deliver 45 microdrops/minute.


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Related Questions

Correct Answer is ["21"]

Explanation

Here's how to calculate the infusion rate for lactated Ringer's solution:

We know:

Total volume of lactated Ringer's solution: 1 liter (1000 mL) (given)

Infusion duration: 8 hours (given)

IV administration set drip rate: 10 gtt/mL (given)

We need to find:

Infusion rate in gtt/min

Steps:

Calculate the volume that needs to be delivered per hour:

Volume per hour (mL) = Total volume (mL) / Infusion time (hours)

Volume per hour (mL) = 1000 mL / 8 hours

Volume per hour (mL) = 125 mL/hour

Calculate the infusion rate in gtt/min:

Infusion rate (gtt/min) = Volume per hour (mL) x Drip rate (gtt/mL) / 60 minutes/hour (convert hour to minutes)

Infusion rate (gtt/min) = 125 mL/hour x 10 gtt/mL / 60 minutes/hour

Infusion rate (gtt/min) = 20.83 gtt/min (round to nearest whole number)

Therefore, the nurse should regulate the infusion at 21 gtt/min.

Correct Answer is ["0.4"]

Explanation

Here's the breakdown of the calculation:

The medication vial is labeled 1,200,000 units/2 mL, which means there are 1,200,000 units of penicillin G per every 2 mL of the medication.

We need to find out how many mL are needed to administer the prescribed dose of 240,000 units.

To do this, we can divide the desired dose (240,000 units) by the concentration of the medication (units per mL).

Calculation:

Dose per mL = 1,200,000 units / 2 mL = 600,000 units/mL

Desired dose / Dose per mL = 240,000 units / 600,000 units/mL = 0.4 mL

Rounding to the nearest tenth, the nurse should administer 0.4 mL of Penicillin G procaine.

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