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Difficulty: HardPharmacological and Parenteral Therapies

A client in the intensive care unit is receiving a continuous intravenous (IV) infusion of norepinephrine at 12 mcg/min12 \text{ mcg/min} via a single-lumen peripherally inserted central catheter (PICC) for septic shock. The client's current mean arterial pressure (MAP) is 64 mmHg64 \text{ mmHg}. The healthcare provider prescribes a stat dose of IV push hydrocortisone. Which action by the nurse is the most appropriate?

  1. A
    Pause the norepinephrine infusion, flush the PICC with 10 mL10 \text{ mL} of 0.9%0.9\% sodium chloride, administer the hydrocortisone, and flush again.
  2. B
    Dilute the hydrocortisone in 50 mL50 \text{ mL} of 0.9%0.9\% sodium chloride and infuse it as a secondary piggyback into the PICC line.
  3. Establish a separate peripheral intravenous catheter to administer the hydrocortisone.Answer
  4. D
    Administer the hydrocortisone over 2 minutes2 \text{ minutes} through the Y-site closest to the client while the norepinephrine continues to infuse.

Answer

The most appropriate action is to establish a separate peripheral intravenous catheter to administer the hydrocortisone.
Vasoactive medications like norepinephrine have a very short half-life and potent hemodynamic effects. They require a dedicated intravenous line to maintain a steady, precisely titrated state. Flushing the line or pushing medications through the same lumen displaces the highly concentrated vasopressor residing in the catheter's dead space, delivering a rapid, potentially lethal bolus to the client. Additionally, pausing the infusion causes immediate hypotension. Therefore, the safest action is to establish a new peripheral intravenous catheter for any additional medications.

Step-by-Step Solution

1
Analyze the client's current physiological status and intravenous access.
The client is in septic shock with a borderline MAP (64 mmHg64 \text{ mmHg}), entirely dependent on a continuous norepinephrine infusion running through a single-lumen central line.
Understanding the client's hemodynamic fragility is necessary to evaluate the safety of altering the vasoactive infusion.
2
Evaluate the fluid dynamics of administering an IV push medication into a continuous vasopressor line.
Pushing a medication or flushing the line will rapidly force the concentrated norepinephrine residing in the catheter lumen into the client's systemic circulation.
This unintended bolus can cause life-threatening hypertension and arrhythmias, while pausing the infusion removes life-sustaining vascular support.
3
Determine the safest route for administering the stat medication.
The nurse must leave the single-lumen PICC undisturbed to maintain continuous hemodynamic stability and start a new peripheral IV catheter for the hydrocortisone.
Vasoactive continuous infusions must have a dedicated line to ensure safe, uninterrupted delivery without bolus effects.

Key Concept

Safe administration of parenteral therapies requires a dedicated intravenous line for continuous vasoactive medications (like norepinephrine) to prevent unintended boluses and sudden hemodynamic collapse.
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Topics

Pharmacological and Parenteral Therapies

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