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Question

Difficulty: MediumPhysiological Adaptation

A nurse is caring for a client who is receiving intravenous antibiotics for a severe bacterial infection. The nurse is monitoring the client for the development of systemic complications. Which of the following physiological findings provides the earliest indication that the client is entering the hyperdynamic (warm) phase of septic shock?

  1. A
    Heart rate of 118 beats/minute, a narrowing pulse pressure, and cool, clammy skin
  2. Heart rate of 115 beats/minute, bounding peripheral pulses, and warm, flushed skinAnswer
  3. C
    Heart rate of 54 beats/minute, a widening pulse pressure, and irregular respirations
  4. D
    Blood pressure of 78/42 mm Hg, absent pedal pulses, and mottled extremities

Answer

The finding of a heart rate of 115 beats/minute, bounding peripheral pulses, and warm, flushed skin is the earliest indicator of hyperdynamic septic shock.
In the initial (hyperdynamic or 'warm') phase of septic shock, the body's inflammatory response to an infection causes profound peripheral vasodilation. To compensate for the resulting drop in systemic vascular resistance, the heart rate and stroke volume increase. This increased cardiac output combined with vasodilation produces the classic early signs of septic shock: tachycardia, bounding pulses, and warm, flushed skin.

Step-by-Step Solution

1
Analyze the client's clinical context.
The client has a severe bacterial infection and is at high risk for developing septic shock.
Identifying the primary risk factor helps anticipate specific physiological complications and guides assessment priorities.
2
Differentiate the phases and types of shock.
Early septic shock (hyperdynamic phase) is characterized by massive peripheral vasodilation, unlike early hypovolemic or cardiogenic shock which feature peripheral vasoconstriction.
Understanding the unique pathophysiology of septic shock prevents confusing its early signs with other shock states.
3
Evaluate the clinical options against the pathophysiology of early septic shock.
Systemic vasodilation leads to warm skin and bounding pulses, while the heart rate increases as a compensatory mechanism to maintain cardiac output.
Matching the physiological mechanism (vasodilation) to the clinical signs (warm skin, bounding pulses) successfully identifies the correct early presentation.

Key Concept

Pathophysiology and Assessment of Early Septic Shock
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Topics

Physiological Adaptation

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