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Difficulty: HardPhysiological Adaptation

An adult client is receiving continuous intravenous fluid replacement for massive gastrointestinal losses secondary to a high-output enterocutaneous fistula. When evaluating the client's hemodynamic status, which assessment findings indicate the development of early, compensatory hypovolemic shock? Select all that apply.

  1. A progressive narrowing of the pulse pressureAnswer
  2. Heart rate increasing from 82 to 114 beats per minuteAnswer
  3. New-onset restlessness and apprehensionAnswer
  4. D
    Arterial blood gas revealing a PaCO2 of 52 mm Hg
  5. E
    Warm, flushed skin on the bilateral lower extremities
  6. F
    Urine output totaling 65 mL over the past hour

Answer

The correct findings are a progressive narrowing of the pulse pressure, an increasing heart rate, and new-onset restlessness.
During the compensatory stage of hypovolemic shock, the body's sympathetic nervous system activates to maintain cardiac output and vital organ perfusion. This neurohormonal response results in an increased heart rate (tachycardia) and peripheral vasoconstriction. The vasoconstriction elevates the diastolic blood pressure, leading to a narrowed pulse pressure. Additionally, subtle decreases in cerebral oxygenation manifest early as behavioral changes, such as restlessness, anxiety, or apprehension.

Step-by-Step Solution

1
Analyze the client's clinical scenario.
The client has massive GI fluid losses, placing them at high risk for hypovolemic shock.
Identifying the etiology (volume loss) helps anticipate the specific compensatory physiological responses.
2
Recall the physiological changes in the compensatory stage of shock.
The body activates the sympathetic nervous system, releasing epinephrine and norepinephrine to maintain cardiac output and blood pressure.
This sympathetic response drives the early clinical manifestations.
3
Evaluate each option against known compensatory mechanisms.
Tachycardia, narrowed pulse pressure (due to vasoconstriction), and restlessness (due to mild cerebral hypoxia) are all classic early signs.
Matching expected pathophysiology to assessment findings ensures accurate clinical judgment.
4
Identify and exclude incorrect findings that contradict early hypovolemic shock.
High PaCO2 (respiratory acidosis), warm/flushed skin, and normal urine output are excluded.
These indicate either different types of shock (septic), later stages of failure, or a lack of distress.

Key Concept

Early Physiological Signs of Compensatory Hypovolemic Shock
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Topics

Physiological Adaptation

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