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Hyperammonemia Physiology and Management: A Nephrology-Centered Review
Patrick Hofmann1, Danielle L Saly2
1Nephrology Division, Department of Internal Medicine, Massachusetts General Hospital, Boston, MA; Harvard Medical School, Boston, MA; Harvard T.H. Chan School of Public Health, Boston, MA.
Advances in Kidney Disease and Health
|July 3, 2026
Summary
Hyperammonemia, a dangerous condition from liver or other causes, requires immediate medical attention to prevent brain damage. This review covers ammonia balance, causes, diagnosis, and treatments for adults.
Area of Science:
- Nephrology
- Gastroenterology
- Neurology
Background:
- Hyperammonemia is a critical condition stemming from hepatic and nonhepatic causes.
- It poses a significant risk of neurologic injury if not promptly managed.
- Understanding ammonia homeostasis is vital for patient outcomes.
Purpose of the Study:
- To review the physiological roles of key organs in ammonia homeostasis.
- To outline diagnostic strategies and therapeutic interventions for hyperammonemia.
- To identify knowledge gaps in adult hyperammonemia management.
Main Methods:
- Literature review focusing on ammonia metabolism and regulation.
- Synthesis of information on causes, diagnosis, and treatment of hyperammonemia.
- Analysis of principles for kidney replacement therapy in hyperammonemia.
Main Results:
- Detailed explanation of ammonia's role in acid-base and potassium balance.
- Summary of diverse etiologies leading to hyperammonemia.
- Overview of current diagnostic and non-dialytic treatment approaches.
Conclusions:
- Prompt evaluation and intervention are crucial for preventing neurologic complications.
- Kidney replacement therapy principles require careful consideration for dosing and selection.
- Further research is needed to address uncertainties in adult hyperammonemia management.
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