1. Hyponatremia in Cirrhosis: An Update.
- Author
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Alukal JJ, John S, and Thuluvath PJ
- Subjects
- Acute Kidney Injury metabolism, Acute Kidney Injury physiopathology, Acute-On-Chronic Liver Failure metabolism, Acute-On-Chronic Liver Failure physiopathology, Albumins therapeutic use, Antidiuretic Hormone Receptor Antagonists therapeutic use, Ascites physiopathology, Fluid Therapy, Hepatic Encephalopathy metabolism, Hepatic Encephalopathy physiopathology, Hepatorenal Syndrome metabolism, Hepatorenal Syndrome physiopathology, Humans, Hypertension, Portal physiopathology, Hyponatremia physiopathology, Hyponatremia therapy, Liver Cirrhosis physiopathology, Liver Transplantation, Saline Solution, Hypertonic therapeutic use, Splanchnic Circulation physiology, Tolvaptan therapeutic use, Vasodilation physiology, Ascites metabolism, Hypertension, Portal metabolism, Hyponatremia metabolism, Liver Cirrhosis metabolism, Renin-Angiotensin System physiology, Vasopressins metabolism
- Abstract
Hyponatremia is frequently seen in patients with ascites secondary to advanced cirrhosis and portal hypertension. Although not apparent in the early stages of cirrhosis, the progression of cirrhosis and portal hypertension leads to splanchnic vasodilation, and this leads to the activation of compensatory mechanisms such as renin-angiotensin-aldosterone system (RAAS), sympathetic nervous system, and antidiuretic hormone (ADH) to ameliorate low circulatory volume. The net effect is the avid retention of sodium and water to compensate for the low effective circulatory volume, resulting in the development of ascites. These compensatory mechanisms lead to impairment of the kidneys to eliminate solute-free water in decompensated cirrhosis. Nonosmotic secretion of antidiuretic hormone (ADH), also known as arginine vasopressin, further worsens excess water retention and thereby hyponatremia. The management of hyponatremia in this setting is a challenge as conventional therapies for hyponatremia including fluid restriction and correction of hypokalemia are frequently inefficacious. In this review, we discuss the pathophysiology, complications, and various treatment modalities, including albumin infusion, selective vasopressin receptor antagonists, or hypertonic saline for patients with severe hyponatremia and those awaiting liver transplantation.
- Published
- 2020
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