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Zorluk: OrtaPhysiological Adaptation

A nurse is evaluating a client who is 4 hours postoperative following a partial nephrectomy. Which assessment finding provides the earliest indication that the client is developing hypovolemic shock?

  1. A steady increase in resting heart rate accompanied by a narrowing pulse pressureCevap
  2. B
    A sudden drop in systolic blood pressure to 88 mm Hg with faint peripheral pulses
  3. C
    Shallow respirations and arterial blood gas values demonstrating uncompensated respiratory acidosis
  4. D
    A reduction in hourly urine output to 40 mL/hr combined with localized incisional pain

Cevap

The earliest indicator of developing hypovolemic shock is a steady increase in resting heart rate accompanied by a narrowing pulse pressure.
In the early stages of hypovolemic shock, the body's physiological adaptation involves sympathetic nervous system activation. This increases the heart rate to maintain cardiac output and causes peripheral vasoconstriction, which elevates the diastolic blood pressure, thereby narrowing the pulse pressure. These subtle changes occur well before the systolic blood pressure drops.

Adım Adım Çözüm

1
Analyze the client's postoperative status and risk for hemorrhage following a highly vascular procedure like a partial nephrectomy.
Identify that the client is at high risk for internal bleeding and subsequent hypovolemic shock.
Recognizing the primary postoperative complication dictates which assessment findings to prioritize.
2
Evaluate the physiological sequence of shock to distinguish between early compensatory signs and late decompensated signs.
Determine that the sympathetic nervous system triggers tachycardia and peripheral vasoconstriction first, which narrows the pulse pressure before the systolic pressure actually falls.
Understanding the timeline of physiological adaptation allows the nurse to intervene before irreversible organ damage occurs.
3
Compare the available options against the early compensatory mechanisms of shock.
Select the option describing tachycardia and a narrowing pulse pressure as the earliest reliable indicator.
This directly matches the body's initial attempt to maintain perfusion in the face of declining intravascular volume.

Anahtar Kavram

Early recognition of hypovolemic shock relies on identifying compensatory mechanisms, specifically tachycardia and narrowing pulse pressure, prior to the onset of frank hypotension.
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Konular

Physiological Adaptation

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