What is hyponatremia in cirrhosis, and how is it managed?

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Multiple Choice

What is hyponatremia in cirrhosis, and how is it managed?

Hyponatremia in cirrhosis is primarily dilutional. Cirrhosis causes splanchnic vasodilation and a relative decrease in effective arterial blood volume, which triggers nonosmotic release of antidiuretic hormone (vasopressin). This promotes free-water retention more than sodium retention, lowering serum sodium and often accompanying ascites and edema. Management centers on limiting free water and protecting circulatory balance while avoiding rapid shifts in sodium. Fluid restriction helps prevent further dilution. Diuretic therapy is adjusted carefully to control fluid overload without worsening hyponatremia. In selected patients with refractory dilutional hyponatremia, vasopressin receptor antagonists (such as tolvaptan) can be used to promote aquaresis, but they require caution due to cost and potential liver-related risks. Importantly, correcting sodium too quickly carries a real risk of osmotic demyelination syndrome, so rates of correction should be gradual and tightly monitored. In cases of severe symptoms, hypertonic saline may be used with careful monitoring, but this is not routine management. Additionally, address the underlying cirrhosis and its complications (ascites, circulatory dysfunction) and consider definitive strategies such as transplantation when appropriate.

Hyponatremia in cirrhosis is primarily dilutional. Cirrhosis causes splanchnic vasodilation and a relative decrease in effective arterial blood volume, which triggers nonosmotic release of antidiuretic hormone (vasopressin). This promotes free-water retention more than sodium retention, lowering serum sodium and often accompanying ascites and edema.

Management centers on limiting free water and protecting circulatory balance while avoiding rapid shifts in sodium. Fluid restriction helps prevent further dilution. Diuretic therapy is adjusted carefully to control fluid overload without worsening hyponatremia. In selected patients with refractory dilutional hyponatremia, vasopressin receptor antagonists (such as tolvaptan) can be used to promote aquaresis, but they require caution due to cost and potential liver-related risks. Importantly, correcting sodium too quickly carries a real risk of osmotic demyelination syndrome, so rates of correction should be gradual and tightly monitored. In cases of severe symptoms, hypertonic saline may be used with careful monitoring, but this is not routine management.

Additionally, address the underlying cirrhosis and its complications (ascites, circulatory dysfunction) and consider definitive strategies such as transplantation when appropriate.

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