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Difficulty: MediumPhysiological Adaptation

A nurse is caring for a client who sustained a pelvic fracture following a motor vehicle collision. The nurse monitors the client closely for internal bleeding and suspects the onset of the early compensatory stage of hypovolemic shock. Which clinical manifestations support this assessment? Select all that apply.

  1. Unexplained restlessness and mild apprehensionAnswer
  2. A narrowing pulse pressureAnswer
  3. C
    Systolic blood pressure dropping below 85 mm Hg
  4. D
    Arterial blood gas results indicating respiratory acidosis
  5. Heart rate increasing from 72 to 114 beats per minuteAnswer

Answer

The correct findings are unexplained restlessness and mild apprehension, a narrowing pulse pressure, and an increased heart rate.
In the early compensatory stage of hypovolemic shock, the body's primary goal is to maintain perfusion to vital organs. The sympathetic nervous system is activated, releasing epinephrine and norepinephrine. This response causes an increased heart rate (tachycardia) to boost cardiac output and peripheral vasoconstriction, which elevates the diastolic blood pressure, leading to a narrowed pulse pressure. Additionally, the brain is highly sensitive to slight decreases in oxygenation, making neurological changes like restlessness, anxiety, or mild confusion one of the earliest clinical indicators of declining perfusion.

Step-by-Step Solution

1
Analyze the client's clinical situation.
The client has a pelvic fracture, placing them at high risk for concealed hemorrhage and hypovolemic shock.
Understanding the mechanism of injury helps anticipate potential life-threatening complications.
2
Identify the physiological changes associated with the 'early compensatory' stage of shock.
The body activates the sympathetic nervous system to maintain cardiac output and blood pressure despite fluid loss.
Compensatory mechanisms include increased heart rate, peripheral vasoconstriction, and increased respiratory rate.
3
Evaluate each option against the expected compensatory responses.
Restlessness (decreased cerebral oxygenation), narrowing pulse pressure (vasoconstriction raising diastolic BP), and tachycardia (increased sympathetic tone) are all early signs. Hypotension and respiratory acidosis occur in later, progressive stages.
Differentiating between early and late signs of shock is crucial for timely and effective nursing interventions.

Key Concept

Early Compensatory Shock Indicators
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Topics

Physiological Adaptation

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