Understanding Metabolic Encephalopathy

What is metabolic encephalopathy?

This condition affects the brain. It’s when the brain has trouble working because of a chemical, or metabolic, problem in the body. Confusion, memory problems, and changes in behavior can occur. In severe cases, a person can go into a coma. Prompt diagnosis and treatment is key to getting better.

What causes metabolic encephalopathy?

Metabolic encephalopathy is the result of systemic illness, such as diabetes, liver disease, renal failure or heart failure The main types of metabolic encephalopathies include:

• Hepatic encephalopathy: This is primarily due to liver failure, leading to the accumulation of neurotoxins such as ammonia.

• Uremic encephalopathy: This results from advanced kidney failure, where the retention of uremic toxins, electrolyte imbalances, and alterations in hormonal metabolism contribute to cerebral dysfunction.

• Hypoglycemic encephalopathy: This is caused by low blood glucose levels leading to insufficient energy supply to the brain.

• Inherited metabolic disorders: These include urea cycle disorders, amino acid metabolism disorders, organic acidemias, and mitochondrial diseases. These conditions often lead to the accumulation of toxic metabolites or energy production deficits, causing acute encephalopathy.

• Electrolyte imbalances: These are caused by severe disturbances in sodium, calcium, or magnesium levels leading to disruption in neuronal function.

What are the symptoms of metabolic encephalopathy?

The symptoms of this brain condition vary from person to person and depend on the underlying cause. They may be mild, like trouble focusing. Or they can be severe, including coma. The symptoms may include:

• Changes in behavior, such as agitation or paranoia

• Confusion

• Delusions

• Feeling sleepy

• Lack of awareness

• Muscle cramps or weakness

• Problems with memory, thought, or speech

• Tremors or jerky movements

• Problems moving or walking

• Trouble sleeping

• Vision problems

• Seizures

How is metabolic encephalopathy diagnosed?

Metabolic encephalopathy may be hard to diagnose. Its symptoms may look like other health problems. These include epilepsy, a brain injury, or stroke. To help with the diagnosis, a doctor will do a physical exam. They will also ask about symptoms and past health.

These tests may also be done:

• Blood draw. This test can find problems with electrolytes or vitamin levels. It may also reveal an infection, toxins, or an organ problem, such as liver disease.

• CT or MRI scan of the head. These imaging tests may show problems in the brain.

• Lumbar puncture. This test checks the fluid around the brain and spinal cord. This fluid is called cerebrospinal fluid (CSF). During the test, the lower back is numbed. Then a doctor inserts a needle to take some CSF out. The CSF is checked in a lab for infection.

• Electroencephalography (EEG). This test checks the electrical activity in the brain. It may show problems like seizures.

How is metabolic encephalopathy treated?

A doctor will talk with you about treatment options. These will depend mainly on the underlying cause of the metabolic encephalopathy. Together, you and the doctor can choose the best treatment.

The first step in treatment is finding the cause of metabolic encephalopathy. This brain condition can often be reversed by treating the cause. For example:

• Hepatic encephalopathy treatment involves lowering ammonia levels.

• Uremic encephalopathy is treated with dialysis.

• Hypoglycemic encephalopathy is treated with glucose administration.

• Inherited metabolic disorders may involve emergency metabolic management, disease-specific interventions, and supportive care.

• Electrolyte imbalances can be treated with fluids and medicines.

Treatment may also include:

• Calm and quiet space. People with this brain condition may become agitated because they are confused. Limiting noise and other disturbances may help.

• Other medicines. These can help ease some symptoms, such as agitation or problems sleeping.

• Memory or cognitive therapies. These treatments can help with recovery. They can help a person regain their memory or thinking skills. Counseling and support may also be needed.

What are the complications of metabolic encephalopathy?

This brain condition may lead to other health problems, such as:

• Long-term memory loss

• Muscle movement problems

• Depression

• Brain damage

• Death

What can you do to feel better?

Metabolic encephalopathy often gets better with treatment. But a full recovery may take time. Problems with memory or thinking may last a while. Talk with your healthcare team about how long recovery may take. It may also help to take an active role in care:

• Work closely with doctors. They are here to support you in care decisions.

• Keep all follow-up appointments.

• Make lifestyle changes if needed. These may help address the cause of metabolic encephalopathy and prevent it from occurring again.

When to call 911

Call 911 right away if these symptoms occur:

• Trouble breathing

• Chest pain

When to contact your doctor

Reach out to your doctor right away if these occur:

• Fever of 100.4°F (38°C) or higher, or as directed by your doctor

• Symptoms that don’t get better or get worse

• New symptoms