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Zorluk: Çok zorPharmacological and Parenteral Therapies

An intensive care nurse is managing a client in profound cardiogenic shock complicated by severe metabolic acidosis. The client has a single-lumen central venous catheter currently dedicated to a continuous intravenous infusion of norepinephrine at 0.15 mcg/kg/min0.15 \text{ mcg/kg/min} to maintain a mean arterial pressure of 62 mm Hg62 \text{ mm Hg}. The healthcare provider gives a STAT prescription for 50 mEq50 \text{ mEq} of intravenous sodium bicarbonate. Which action represents the safest and most appropriate method for the nurse to administer this medication?

  1. Establish a new peripheral intravenous access site to administer the prescribed medication independently.Cevap
  2. B
    Attach the medication syringe to the Y-site port closest to the client's insertion site to minimize medication contact time within the tubing.
  3. C
    Suspend the continuous vasopressor infusion briefly, flush the catheter with 0.9%0.9\% sodium chloride, administer the push, and immediately resume the vasopressor.
  4. D
    Withhold the medication and request a prescription for an enteral alkalizing agent to avoid central line complications until a multi-lumen catheter is placed.

Cevap

Establish a new peripheral intravenous access site to administer the prescribed medication independently.
The correct action recognizes two critical physiological and pharmacological principles: first, norepinephrine is a life-sustaining continuous infusion that cannot be interrupted without causing rapid cardiovascular collapse; second, sodium bicarbonate is highly alkaline and will immediately deactivate catecholamines if they share the same intravenous pathway. Establishing a separate intravenous line is the only safe solution that addresses both constraints.

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1
Analyze the client's hemodynamic status.
The client is in profound shock, dependent on continuous norepinephrine to maintain a borderline mean arterial pressure (62 mm Hg62 \text{ mm Hg}).
Understanding the client's extreme fragility confirms that the vasopressor infusion cannot be paused, even for a brief medication push and flush.
2
Evaluate the pharmacological compatibility of the prescribed medications.
Sodium bicarbonate is a highly alkaline solution, whereas norepinephrine is a catecholamine that requires an acidic environment to remain chemically stable.
Mixing these two medications will cause the alkaline bicarbonate to chemically inactivate the norepinephrine and may result in crystallization within the tubing.
3
Determine the physical constraints of the available intravenous access.
The client has a single-lumen central catheter, meaning any medication administered through its ports will directly mix with the continuous norepinephrine infusion before entering the bloodstream.
Since the single lumen cannot be safely shared (due to chemical incompatibility) and the primary infusion cannot be paused (due to shock), the existing line is entirely unavailable for the new medication.
4
Synthesize findings to select the safest nursing intervention.
A secondary intravenous access (such as a new peripheral line) must be established to administer the STAT sodium bicarbonate.
This is the only method that ensures the immediate delivery of the required alkalizing agent without jeopardizing the client's life-sustaining hemodynamic support.

Anahtar Kavram

Intravenous Compatibility and Vasopressor Management in Shock
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Konular

Pharmacological and Parenteral Therapies

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