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A nurse is reviewing the arterial blood gas (ABG) results for a client who is experiencing acute respiratory distress. The results show a pH of 7.257.25, PaCO2\text{PaCO}_2 of 60 mm Hg60\text{ mm Hg}, and HCO3−\text{HCO}_3^- of 24 mEq/L24\text{ mEq/L}. Based on these values, which acid-base imbalance is the client experiencing?

  1. A
    Uncompensated metabolic acidosis
  2. B
    Partially compensated respiratory alkalosis
  3. Uncompensated respiratory acidosisCevap
  4. D
    Fully compensated metabolic alkalosis

Cevap

Uncompensated respiratory acidosis
The correct answer identifies uncompensated respiratory acidosis. The pH of 7.257.25 is below the normal range (7.357.35 to 7.457.45), which confirms an acidotic state. The PaCO2\text{PaCO}_2 of 60 mm Hg60\text{ mm Hg} is elevated above the normal range (3535 to 45 mm Hg45\text{ mm Hg}), matching the acidosis and indicating a respiratory etiology. Because the HCO3−\text{HCO}_3^- of 24 mEq/L24\text{ mEq/L} remains within the normal limits (2222 to 26 mEq/L26\text{ mEq/L}), the kidneys have not yet initiated compensation.

Adım Adım Çözüm

1
Analyze the client's pH value.
The pH is 7.257.25, which is below the normal range of 7.357.35 to 7.457.45.
This establishes that the primary state is acidemia (acidosis).
2
Evaluate the PaCO2\text{PaCO}_2 value.
The PaCO2\text{PaCO}_2 is 60 mm Hg60\text{ mm Hg}, which is above the normal range of 3535 to 45 mm Hg45\text{ mm Hg}.
Because an elevated PaCO2\text{PaCO}_2 acts as an acid, this matches the acidotic pH and confirms a respiratory origin.
3
Assess the HCO3−\text{HCO}_3^- value.
The HCO3−\text{HCO}_3^- is 24 mEq/L24\text{ mEq/L}, which is well within the normal range of 2222 to 26 mEq/L26\text{ mEq/L}.
A normal bicarbonate level indicates that the kidneys have not yet started to compensate for the respiratory disturbance.

Anahtar Kavram

Arterial Blood Gas (ABG) Interpretation
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