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Difficulty: Very hardPhysiological Adaptation

A clinical nurse is managing a client admitted with severe acute pyelonephritis. The client suddenly develops new-onset restlessness and confusion. Assessment reveals bounding peripheral pulses, warm and flushed skin, and the following vital signs: temperature 39.2∘C39.2^\circ\text{C} (102.6∘F102.6^\circ\text{F}), heart rate 128128 beats/minute, respiratory rate 3030 breaths/minute, and blood pressure 86/50 mm Hg86/50\text{ mm Hg}. An arterial blood gas (ABG) sample drawn on room air demonstrates a pH of 7.507.50, PaCO 2_2 of 26 mm Hg26\text{ mm Hg}, PaO 2_2 of 82 mm Hg82\text{ mm Hg}, and HCO 3−_3^- of 21 mEq/L21\text{ mEq/L}. Based on this clinical picture, what is the most critical immediate action the nurse should execute?

  1. A
    Request a prescription for a continuous norepinephrine infusion to support vascular tone
  2. B
    Administer an intravenous antipyretic to lower the body temperature and reduce the elevated respiratory drive
  3. Initiate a rapid intravenous fluid bolus of an isotonic crystalloid solutionAnswer
  4. D
    Apply a non-rebreather mask and instruct the client to take slow, shallow breaths to correct the alkalosis

Answer

Initiate a rapid intravenous fluid bolus of an isotonic crystalloid solution.
The client's presentation of severe hypotension, marked tachycardia, warm/flushed skin, and bounding pulses, combined with a severe underlying infection (pyelonephritis), clearly indicates the early hyperdynamic phase of septic shock. The uncompensated respiratory alkalosis is a classic compensatory response to early systemic inflammation. The most critical, life-saving immediate action for distributive shock with relative hypovolemia is aggressive fluid resuscitation using isotonic crystalloids to restore circulating volume and organ perfusion.

Step-by-Step Solution

1
Analyze the vital signs and physical assessment findings.
The presence of severe hypotension (86/50 mm Hg86/50\text{ mm Hg}), marked tachycardia (128128 beats/minute), bounding pulses, and warm/flushed skin in a client with a severe infection indicates distributive shock, specifically the early hyperdynamic ('warm') phase of septic shock.
Recognizing the atypical presentation of early septic shock (warm skin instead of cool/clammy) is crucial for rapid intervention.
2
Interpret the arterial blood gas (ABG) results in the context of the clinical scenario.
The ABG shows uncompensated respiratory alkalosis (pH 7.507.50, PaCO 2_2 26 mm Hg26\text{ mm Hg}). In the context of infection, this is a classic early physiological response to systemic inflammation and endotoxin release.
Endotoxins directly stimulate the medullary respiratory center, causing hyperventilation before lactic acidosis has fully developed.
3
Determine the physiological priority based on the synthesized data.
The massive systemic vasodilation has caused a state of relative hypovolemia, drastically reducing perfusion to vital organs, as evidenced by the new-onset confusion.
Restoring intravascular volume is the absolute prerequisite before addressing vascular tone or secondary symptoms.
4
Select the appropriate evidence-based intervention.
Rapid administration of isotonic crystalloid fluids (typically 30 mL/kg30\text{ mL/kg}) is the primary, life-saving intervention for sepsis-induced tissue hypoperfusion.
Crystalloids quickly expand the intravascular space to compensate for the massive vasodilation.

Key Concept

Early (Hyperdynamic) Septic Shock Recognition and Initial Resuscitation
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Topics

Physiological Adaptation

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