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Difficulty: HardPhysiological Adaptation

An 82-year-old client is being treated on the medical-surgical unit for a severe lower respiratory tract infection. During afternoon rounds, a visiting family member tells the practical nurse (PN) that the client seems "much more restless and confused" compared to the morning. Which subsequent assessment findings should the PN identify as early warning signs of systemic hypoperfusion or impending shock? Select all that apply.

  1. Inability to identify their current location, which represents a change from the morning assessmentAnswer
  2. A resting apical heart rate that has steadily climbed to 114 beats per minuteAnswer
  3. A decrease in systolic blood pressure of 25 mm Hg from the admission baselineAnswer
  4. D
    Reports of moderate chest wall discomfort when coughing or taking deep breaths
  5. E
    A documented urinary output of 340 mL over the most recent 8-hour period

Answer

The early warning signs of systemic hypoperfusion include a change in mental status (disorientation), an increasing resting heart rate (tachycardia), and a significant relative decrease in systolic blood pressure.
Early physiological adaptation to shock involves sympathetic nervous system activation, leading to tachycardia as the body attempts to maintain cardiac output. As compensation begins to fail, the systolic blood pressure drops (even if not yet strictly hypotensive, a relative drop of 25 mm Hg is significant). Furthermore, the brain is highly sensitive to hypoperfusion and hypoxia, meaning sudden confusion or restlessness is a critical, early sign of decompensation, particularly in older adults.

Step-by-Step Solution

1
Analyze the client's clinical presentation and age.
The client is an 82-year-old with a severe infection who is exhibiting new-onset restlessness and confusion.
Older adults often present atypically with infections or shock. Changes in mentation are frequently the earliest indicators of physiological compromise.
2
Evaluate the hemodynamic parameters for signs of compensation.
A rising heart rate (114 bpm) and dropping systolic blood pressure (decrease of 25 mm Hg) are identified.
The body attempts to maintain cardiac output by increasing heart rate. A dropping blood pressure indicates that these compensatory mechanisms are beginning to fail.
3
Differentiate between expected localized symptoms and acute systemic deterioration.
Chest discomfort during coughing and a urine output of 340 mL over 8 hours are identified as expected or normal findings.
Pleuritic pain is expected with a respiratory infection, and an output of over 30 mL/hr demonstrates adequate renal perfusion, ruling them out as signs of shock.

Key Concept

Recognition of early hemodynamic compromise and hypoperfusion in older adults, prioritizing ABCs over expected localized symptoms.
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Topics

Physiological Adaptation

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