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Question

Difficulty: HardReduction of Risk Potential

A 58-year-old client is being managed in the high-dependency unit for acute necrotizing pancreatitis. Over the past three hours, the nurse notes the client's heart rate has increased from 8686 to 116116 beats/min, and the blood pressure has trended from 134/78134/78 mm Hg to 112/86112/86 mm Hg. The client's urine output for the last hour is 1515 mL. The most recent arterial blood gas analysis reveals a pH of 7.317.31, PaCO2 of 3535 mm Hg, and HCO3- of 1616 mEq/L. Based on these findings, which immediate risk mitigation action should the nurse prioritize?

  1. Administer a prescribed rapid intravenous crystalloid fluid bolus.Answer
  2. B
    Prepare the client for emergency endotracheal intubation to correct respiratory acidosis.
  3. C
    Elevate the head of the bed to a high-Fowler's position to maximize diaphragmatic excursion.
  4. D
    Document the findings as expected physiological adaptations and continue hourly monitoring.

Answer

Administer a prescribed rapid intravenous crystalloid fluid bolus.
The clinical picture demonstrates early, compensatory hypovolemic shock, a major complication of acute necrotizing pancreatitis due to massive fluid shifting (third-spacing). The key indicators are a narrowing pulse pressure (dropping from 5656 mm Hg to 2626 mm Hg), progressive tachycardia, and severely decreased urine output. Furthermore, the arterial blood gas results confirm metabolic acidosis (pH 7.317.31, HCO3- 1616 mEq/L), which occurs secondary to tissue hypoperfusion and lactic acid buildup. Administering a rapid intravenous crystalloid bolus directly addresses the underlying fluid deficit, mitigates the risk of organ failure, and restores adequate tissue perfusion.

Step-by-Step Solution

1
Analyze the vital sign trends to identify signs of hemodynamic instability.
The client has developed tachycardia and a narrowing pulse pressure (dropping from 5656 mm Hg to 2626 mm Hg), accompanied by oliguria.
Narrowing pulse pressure and tachycardia are classic early compensatory mechanisms for hypovolemia before profound hypotension occurs.
2
Interpret the arterial blood gas (ABG) values.
A pH of 7.317.31 (acidosis) and HCO3- of 1616 mEq/L (abnormally low) with a normal PaCO2 indicate uncompensated metabolic acidosis.
Metabolic acidosis in this context is likely due to lactic acid accumulation from poor tissue perfusion, a hallmark of developing shock.
3
Determine the highest priority intervention based on the physiological data.
The most critical action is to restore intravascular volume and improve tissue perfusion.
Acute necrotizing pancreatitis causes massive fluid shifts into the retroperitoneal space (third-spacing). Intravenous fluid resuscitation is the primary risk mitigation strategy to prevent progression to irreversible shock.

Key Concept

Early Recognition and Mitigation of Hypovolemic Shock
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Topics

Reduction of Risk Potential

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