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Ambulatory EEG (Electroencephalograph) Monitoring

What is Ambulatory EEG monitoring? 

EEG stands for Electroencephalogram. This is a recording of the electrical activity of the brain. Ambulatory monitoring involves recording the EEG for a period of up to 5 days. 

Recording this information will help your consultant in the diagnosis and management of your complaint or condition. 

What should I do before the test? 

Please ensure your hair is clean and without products, such as hairspray or gel, as you will be unable to wash or brush it for the duration of the test 

Please do not use any moisturiser or make-up on your face on the day of the test 

Continue to take any prescribed medication and bring along a list of cur-rent medication 

Wear loose clothing to allow you to change easily—you may find it more comfortable wearing trousers/skirts with loose fitting tops 

You may wish to bring a hat or headscarf to disguise the wires. Long hair will need to be tied back. 

You are welcome to bring a friend or relative to accompany you to your appointment. 

What will happen during the test? 

  • You will be required to attend neurophysiology department on day 1 for setup. A Clinical Physiologist will be performing the test and will fully explain the test to you and answer any questions you may have 
  • You will have 21 electrodes applied to the scalp, which will be glued on for the duration .The electrodes will be attached to a recording box that you will take home in a small pouch attached to a belt around the waist. 
  • The setup will take 45-60 minutes and then you will be able to return home 
  • You will be required to return to the department every morning, at a time arranged with the physiologist for 10-15 minutes to allow the recording to be uploaded and batteries to be changed in recording box 
  • You will be able to move around freely and sleep as normal 
  • You must keep the pouch attached at all times 
  • You must not have a bath/shower or attempt to wash or comb your hair while the electrodes are on. Please refrain from scratching your head during the test. 
  • You will be asked to keep a diary of any events during the monitoring period 
  • If sufficient events are captured during the monitoring, the equipment may be removed earlier than first anticipated. 
  • When the test is completed the electrodes will be removed using a solution to dissolve the glue. This will take around 30 minutes. 
  • Staff in training may be present during your investigation, this will be explained at the time of your appointment and consent for this will be discussed with you. 

What happens after the test? 

You will not be told any results on the final day of the test. 

Once the recording has been reviewed by the Clinical Physiologist, a Consultant will then write a report to your referring Doctor in approximately 2-3 weeks time. 

  • Last Updated:
    01 October 2022
  • Review Date:
    01 October 2026
  • Author:
    Natalie Gore/Sam Owen/Beverley Haworth
  • Summary:

    EEG stands for Electroencephalogram. This is a recording of the electrical activity of the brain.

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