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Zorluk: KolayPhysiological Adaptation

A nurse is monitoring a client who is at risk for internal hemorrhage following a percutaneous liver biopsy. Which of the following vital sign trends represents the earliest physiological adaptation to intravascular fluid loss?

  1. Narrowing of the pulse pressureCevap
  2. B
    Decrease in systolic blood pressure
  3. C
    Reduction in the respiratory rate
  4. D
    Widening of the pulse pressure

Cevap

The earliest physiological adaptation to intravascular fluid loss is a narrowing of the pulse pressure.
In the initial stages of hypovolemia or hemorrhage, the body compensates by activating the sympathetic nervous system. This causes peripheral vasoconstriction, which increases systemic vascular resistance. As a result, the diastolic blood pressure rises while the systolic pressure is temporarily maintained, leading to a narrowed pulse pressure. This is one of the earliest detectable physiological adaptations to fluid loss, occurring even before a significant drop in systolic blood pressure.

Adım Adım Çözüm

1
Identify the primary clinical risk for the client.
The client is at risk for hemorrhage (intravascular fluid loss) following a liver biopsy.
Understanding the primary risk determines which physiological changes the nurse should monitor for.
2
Recall the body's initial compensatory mechanisms for fluid loss.
The sympathetic nervous system activates, causing tachycardia and peripheral vasoconstriction.
These mechanisms attempt to maintain cardiac output and vital organ perfusion before total blood volume drops critically low.
3
Determine how vasoconstriction affects blood pressure readings.
Vasoconstriction increases systemic vascular resistance, which primarily elevates the diastolic blood pressure, leading to a narrowed pulse pressure before the systolic pressure significantly drops.
This makes a narrowed pulse pressure one of the earliest detectable changes in shock.

Anahtar Kavram

Early Signs of Hypovolemic Shock
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Konular

Physiological Adaptation

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