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Zorluk: Çok zorPhysiological Adaptation

A client is receiving care in the intensive care unit four days after a severe subarachnoid hemorrhage. The client, previously alert and oriented, suddenly becomes extremely restless and confused. Current assessment findings include a blood pressure of 82/46 mm Hg, heart rate of 126 beats/minute, and a central venous pressure (CVP) of 1 mm Hg. The client's urine output over the past 4 hours was 1,600 mL.

The nurse reviews the most recent laboratory results:

Laboratory TestResultReference Range
Serum sodium119 mEq/L135-145 mEq/L
Serum osmolality256 mOsm/kg275-295 mOsm/kg
Spot urine sodium120 mEq/L20-40 mEq/L

Based on these findings, which of the following prescribed interventions is the highest priority for the nurse to implement?

  1. A
    Restrict the client's total fluid intake to 800 mL over the next 24 hours.
  2. B
    Administer intravenous desmopressin acetate (DDAVP).
  3. Initiate a rapid intravenous infusion of 0.9% sodium chloride.Cevap
  4. D
    Transport the client immediately for a stat non-contrast computed tomography (CT) scan of the head.

Cevap

Initiate a rapid intravenous infusion of 0.9% sodium chloride.
The correct intervention is to administer rapid isotonic fluids because the clinical picture indicates Cerebral Salt Wasting (CSW). CSW is a rare but life-threatening complication of subarachnoid hemorrhage characterized by primary renal sodium wasting, leading to severe hyponatremia and profound hypovolemia (evidenced by the low CVP, hypotension, and tachycardia). The immediate priority is restoring intravascular volume to prevent cerebral ischemia and multi-organ failure.

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1
Analyze the vital signs and hemodynamic parameters.
The blood pressure of 82/46 mm Hg, heart rate of 126 beats/minute, and CVP of 1 mm Hg indicate profound hypovolemic shock.
Identifying the primary life-threat (circulatory collapse) dictates the immediate prioritization of care.
2
Evaluate the laboratory values and intake/output data.
The client has severe hyponatremia (119 mEq/L), low serum osmolality (256 mOsm/kg), inappropriate renal sodium wasting (urine sodium 120 mEq/L), and massive polyuria (1,600 mL/4 hours).
These specific values are required to differentiate between neuro-endocrine complications common after brain injury.
3
Synthesize the data to identify the underlying physiological adaptation failure.
The combination of severe hypovolemia, hyponatremia, and polyuria in a neurosurgical client confirms Cerebral Salt Wasting (CSW), eliminating SIADH (which is euvolemic/hypervolemic with oliguria) and Diabetes Insipidus (which causes hypernatremia).
Accurate pattern recognition prevents the administration of contraindicated therapies.
4
Determine the highest priority nursing intervention.
The nurse must immediately restore intravascular volume with an isotonic crystalloid solution like 0.9% sodium chloride.
Failure to rapidly correct the hypovolemia will lead to cerebral hypoperfusion, vasospasm, and irreversible brain damage.

Anahtar Kavram

Cerebral Salt Wasting (CSW) vs. SIADH Differentiation and Management
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Konular

Physiological Adaptation

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