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Zorluk: KolayPhysiological Adaptation

Following a major abdominal surgery, a client is being monitored closely for potential hemorrhagic complications. Which of the following vital sign trends should the nurse identify as the most reliable early indicator of developing hypovolemic shock?

  1. Narrowing of the pulse pressureCevap
  2. B
    A sudden decrease in systolic blood pressure to 85 mm Hg
  3. C
    Widening of the pulse pressure
  4. D
    A decrease in resting heart rate to 60/min

Cevap

Narrowing of the pulse pressure
In the early (compensatory) stage of hypovolemic shock, the sympathetic nervous system stimulates peripheral vasoconstriction to maintain core perfusion. This clamping down of the blood vessels raises the diastolic blood pressure. Because the systolic blood pressure initially remains normal or drops only slightly, the difference between the two values decreases, resulting in a narrowing of the pulse pressure. This is a critical early warning sign that occurs before frank hypotension.

Adım Adım Çözüm

1
Identify the type of shock the client is at risk for.
The client is at risk for hypovolemic shock due to potential hemorrhage from the abdominal surgery.
Understanding the etiology helps anticipate the specific physiological compensatory mechanisms.
2
Determine the early compensatory mechanisms for hypovolemia.
The sympathetic nervous system releases catecholamines, causing peripheral vasoconstriction and mild tachycardia.
The body attempts to maintain blood pressure and perfusion to vital organs.
3
Analyze how vasoconstriction affects blood pressure readings.
Vasoconstriction primarily raises the diastolic blood pressure, while the systolic blood pressure initially remains stable or drops slightly, causing the gap between them to narrow.
This makes a narrowing pulse pressure one of the most reliable and earliest indicators of shock, before frank hypotension develops.

Anahtar Kavram

Early indicators of hypovolemic shock include a narrowing pulse pressure and mild tachycardia, which occur as compensatory mechanisms before a drop in systolic blood pressure.
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Physiological Adaptation

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