A critically ill pediatric client weighing 15 \text{ kg} is prescribed an epinephrine infu… — NCLEX-RN

A critically ill pediatric client weighing $15 \text{ kg}$ is prescribed an epinephrine infusion at $0.1 \text{ mcg/kg/min}$ to manage severe hypotension. The available medication concentration is $1 \text{ mg}$ of epinephrine mixed in $50 \text{ mL}$ of $5\%$ dextrose in water. A newly licensed nurse programs the infusion pump to deliver $4.5 \text{ mL/hr}$ and prepares to connect the primary tubing to the client's $22\text{-gauge}$ peripheral forearm catheter. Which evaluation by the supervising nurse is most accurate regarding this intended action?

The pump rate is correctly calculated, but the medication must be rerouted to a central venous access device.Answer
B
The medication should be reconstituted in $0.9\%$ sodium chloride, as dextrose solutions rapidly degrade catecholamines.
C
The infusion route is acceptable, but the calculated pump rate must be corrected to $0.45 \text{ mL/hr}$ prior to initiation.
D
The preparation is entirely correct and safe to administer as long as the peripheral insertion site is assessed every hour.

Answer

The calculation of

4.5 \text{ mL/hr}

is correct, but epinephrine is a potent vesicant that must be administered through a central venous catheter to prevent severe tissue necrosis.

The supervising nurse must recognize two critical factors: the mathematical calculation is accurate, but the intended route is dangerous. The calculation (

15 \text{ kg} \times 0.1 \text{ mcg/kg/min} \times 60 \text{ min/hr} \div 20 \text{ mcg/mL}

) equals exactly

4.5 \text{ mL/hr}

. However, epinephrine is a potent vasoconstrictor and vesicant. Administering a continuous infusion through a peripheral vein places the client at an unacceptably high risk for extravasation, which can rapidly lead to severe ischemic tissue necrosis. A central venous catheter is required.

Step-by-Step Solution

Calculate the total required dose per minute.

0.1 \text{ mcg/kg/min} \times 15 \text{ kg} = 1.5 \text{ mcg/min}

Weight-based dosing requires multiplying the prescribed rate by the client's total body weight.

Convert the per-minute dose to an hourly dose.

1.5 \text{ mcg/min} \times 60 \text{ minutes/hr} = 90 \text{ mcg/hr}

Infusion pumps are programmed in milliliters per hour, so the dose must reflect an hourly rate.

Determine the concentration of the available medication.

1 \text{ mg} = 1000 \text{ mcg}

. Therefore,

1000 \text{ mcg} \div 50 \text{ mL} = 20 \text{ mcg/mL}

The dose is in micrograms, so the medication supply must be converted from milligrams to micrograms to match the units.

Calculate the final infusion rate in

\text{mL/hr}

90 \text{ mcg/hr} \div 20 \text{ mcg/mL} = 4.5 \text{ mL/hr}

Dividing the hourly dose by the concentration yields the required pump rate. This confirms the new nurse's math is entirely accurate.

Evaluate the route of administration for safety.

Identify that continuous epinephrine via a

22\text{-gauge}

peripheral IV is unsafe.

Epinephrine is a high-alert vesicant and a potent vasoconstrictor. Continuous infusions require central venous access to prevent severe localized ischemia and tissue necrosis from potential extravasation.

Key Concept

Continuous infusions of potent vasopressors and vesicants (such as epinephrine) require precise weight-based calculation and administration via a central venous access device to prevent ischemic tissue necrosis.

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