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Zorluk: ZorPhysiological Adaptation

A nurse is caring for a client admitted with acute pancreatitis. Over the last 4 hours, the client has become increasingly restless. The nurse assesses the current vital signs: temperature 37.6°C (99.7°F), heart rate 122 bpm, respiratory rate 26 breaths/min, and blood pressure 108/86 mmHg. The client's baseline blood pressure upon admission was 128/74 mmHg. The client's capillary refill is 4 seconds, and peripheral pulses are faint. Which of the following physiological adaptations best explains this client's current clinical presentation?

  1. Sympathetic nervous system activation causing peripheral vasoconstriction in response to severe intravascular fluid shifts.Cevap
  2. B
    Systemic inflammatory response causing widespread peripheral vasodilation and distributive shock.
  3. C
    Impaired alveolar ventilation causing carbon dioxide retention and secondary respiratory acidosis.
  4. D
    Progression to irreversible shock causing profound myocardial depression and loss of autoregulation.

Cevap

The client's presentation is best explained by sympathetic nervous system activation causing peripheral vasoconstriction in response to intravascular fluid shifts.
In acute pancreatitis, fluid shifts rapidly into the interstitial spaces (third-spacing), causing profound hypovolemia. The body adapts by activating the sympathetic nervous system (the fight-or-flight response). Epinephrine and norepinephrine are released, causing intense peripheral vasoconstriction to shunt blood to vital organs. This vasoconstriction raises the systemic vascular resistance and the diastolic blood pressure, resulting in a narrowed pulse pressure (108 - 86 = 22 mmHg). It also causes faint peripheral pulses and delayed capillary refill. The maintained systolic blood pressure and restlessness (indicating brain perfusion is maintained but marginally compromised) confirm the client is actively in the compensatory stage of shock.

Adım Adım Çözüm

1
Analyze the client's vital sign trends and physical assessment findings.
The client has tachycardia (122 bpm), tachypnea (26 breaths/min), a narrowed pulse pressure (22 mmHg compared to baseline 54 mmHg), delayed capillary refill (4 seconds), faint pulses, and restlessness.
Identifying abnormal parameters and calculating the pulse pressure is the first step in recognizing clinical deterioration.
2
Correlate the findings with the pathophysiology of acute pancreatitis.
Acute pancreatitis causes massive inflammatory third-spacing of fluid into the peritoneal cavity, leading to severe hypovolemia.
Understanding the underlying disease process explains the trigger for the systemic physiological changes.
3
Determine the stage and type of shock based on the physiological response.
The body compensates for hypovolemia by activating the sympathetic nervous system. This causes intense peripheral vasoconstriction (increasing diastolic BP, narrowing pulse pressure, delaying capillary refill) to maintain core perfusion.
A narrowed pulse pressure and signs of poor peripheral perfusion with a relatively maintained systolic blood pressure are classic hallmarks of the compensatory stage of shock.

Anahtar Kavram

Compensatory Stage of Hypovolemic Shock
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Konular

Physiological Adaptation

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