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Electroencephalogram (EEG) Test

Imaging & Scans estimated about CNY 200-500 (estimated about USD 30-70) 30 min

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Description

An EEG test records brain electrical activity to help diagnose seizures, sleep disorders, or confusion; patients in China may need it after neurological symptoms, with costs typically ranging ¥200–¥500 and ChinaMedicalHub assisting with hospital booking and interpreter support.

Main Uses

EEG is primarily used to diagnose and monitor seizure disorders, evaluate brain function in comatose patients, study sleep disorders, and investigate other conditions affecting brain function like dementia, head injuries, and infections. It is also used to confirm brain death.

Normal Range

A normal EEG (Electroencephalogram) does not have a specific numerical range but is characterized by the presence of typical brain wave patterns. These include alpha, beta, theta, and delta waves, each with their own frequency ranges: Alpha waves (8-12 Hz), Beta waves (13-30 Hz), Theta waves (4-7 Hz), and Delta waves (0.5-3 Hz). The appearance and distribution of these waves vary depending on the individual's age and state (awake, asleep, etc.).

Low Values - Possible Causes

Low amplitude or absence of certain brain waves can be caused by: Hypoglycemia, Sedative medications, Deep anesthesia, Severe hypothermia, Brain atrophy

High Values - Possible Causes

High amplitude or excessive slow waves may indicate: Epileptic activity, Encephalitis, Brain tumors, Stroke, Metabolic disturbances such as hepatic encephalopathy

estimated about CNY 200-500

estimated about USD 30-70

Duration: 30 min