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Difficulty: MediumPhysiological Adaptation

A practical nurse is caring for a 78-year-old client who was admitted with severe gastroenteritis and prolonged vomiting. The client is receiving continuous intravenous fluids. Which assessment findings should the nurse identify as early indications that the client is developing hypovolemic shock? Select all that apply.

  1. A resting heart rate of 108 beats per minuteAnswer
  2. New onset of unexplained restlessness and anxietyAnswer
  3. A urine output of 15 mL over the past hourAnswer
  4. D
    A blood pressure reading of 116/74 mmHg
  5. E
    Client reports of intermittent abdominal cramping
  6. F
    The client dozing off frequently but waking fully when addressed

Answer

The correct findings are a resting heart rate of 108 beats per minute, new onset of unexplained restlessness and anxiety, and a urine output of 15 mL over the past hour.
In the early (compensatory) stage of hypovolemic shock, the body activates the sympathetic nervous system to maintain cardiac output and tissue perfusion. This results in tachycardia (heart rate over 100 beats per minute) and decreased renal blood flow, causing oliguria (urine output less than 30 mL/hr). Furthermore, the brain's high sensitivity to slight decreases in oxygen delivery causes early neurological changes, most commonly presenting as unexplained restlessness, anxiety, or agitation.

Step-by-Step Solution

1
Analyze the clinical scenario and the client's risk factors.
The client is an older adult with severe fluid loss from prolonged vomiting, placing them at high risk for hypovolemic shock.
Identifying the primary risk factor directs the focus toward complications related to fluid volume deficit.
2
Identify the early compensatory mechanisms of hypovolemic shock.
The body attempts to maintain perfusion by increasing heart rate (tachycardia) and shunting blood away from non-vital organs (causing oliguria).
Recognizing early physiological adaptation prevents progression to irreversible shock.
3
Evaluate neurological changes associated with altered perfusion.
Decreased oxygen delivery to the brain manifests early as mild confusion, restlessness, or anxiety.
The brain is highly sensitive to subtle drops in oxygenation, making neurological status a critical early indicator of shock.
4
Rule out expected findings and normal parameters.
Normal blood pressure, expected localized pain (cramping), and normal sleep patterns are eliminated as indicators of acute shock.
Distinguishing between baseline or expected disease symptoms and emergent acute complications is essential for safe nursing practice.

Key Concept

Early Recognition of Hypovolemic Shock
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Topics

Physiological Adaptation

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