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Zorluk: KolayNephrology

Match the following clinical etiologies with their classic presentation on a serum electrolyte panel.

  • Primary adrenal insufficiencyHyponatremia, hyperkalemia, and normal anion gap metabolic acidosis
  • Severe diarrheaHypokalemia and normal anion gap metabolic acidosis
  • Loop diuretic useHypokalemia, hypomagnesemia, and metabolic alkalosis
  • Primary hyperaldosteronismMild hypernatremia, hypokalemia, and metabolic alkalosis

Cevap

Primary adrenal insufficiency pairs with hyponatremia/hyperkalemia/acidosis; Severe diarrhea pairs with hypokalemia/acidosis; Loop diuretic use pairs with hypokalemia/hypomagnesemia/alkalosis; Primary hyperaldosteronism pairs with hypernatremia/hypokalemia/alkalosis.
Each clinical condition alters renal tubular transport or gastrointestinal losses in specific ways that predictably change serum sodium, potassium, and acid-base balance based on their underlying mechanism of action.

Adım Adım Çözüm

1
Analyze the effects of primary adrenal insufficiency on electrolytes.
Identified that lack of aldosterone causes sodium wasting, potassium retention, and acid retention.
Aldosterone normally reabsorbs sodium and secretes potassium and hydrogen ions in the collecting duct; its absence reverses this.
2
Analyze the effects of severe diarrhea on electrolytes.
Identified that diarrhea causes loss of bicarbonate and potassium.
Lower gastrointestinal secretions are rich in potassium and bicarbonate, leading to a non-anion gap acidosis and hypokalemia when lost.
3
Analyze the effects of loop diuretics on electrolytes.
Identified that they cause loss of potassium, magnesium, and hydrogen ions (alkalosis).
Inhibition of the Na-K-2Cl cotransporter reduces the lumen-positive potential, decreasing paracellular magnesium reabsorption, while increased distal delivery of sodium stimulates potassium and hydrogen secretion.
4
Analyze the effects of primary hyperaldosteronism on electrolytes.
Identified that excess aldosterone causes sodium retention, potassium loss, and hydrogen loss.
Unregulated aldosterone hypersecretion continually drives ENaC channels and apical potassium/hydrogen pumps in the distal nephron.

Anahtar Kavram

Pathophysiology of acid-base and electrolyte disturbances
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Konular

Nephrology

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