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10 April, 2019

The Indications for EEG in Epilepsy

EEG remains the most widely used investigation when epilepsy is suspected, but how and when does one use EEG in the diagnosis of epilepsy?

When not to use EEG to diagnose epilepsy

Epilepsy diagnosis is not always straightforward. Diagnosis depends on precise history taking, general medical and neurological examination, and prudent use of diagnostic tools. Depending on symptoms and examination a physician may order a variety of investigations including EEG, QEEG, ECG (to rule out heart problems like syncope), imaging techniques (including MRI, CT scan, and PET scan), lumbar puncture, prolactin study, blood tests and neuropsychological screening.
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05 March, 2019

Ambulatory EEG

Clinical indications

Routine electroencephalography (EEG) suffers from the same problem as a standard 12 lead electrocardiogram (ECG): it is limited in time. A standard ECG captures 10 seconds of the heart’s electrical activity while a standard EEG captures perhaps 10 to 20 minutes of the brain’s electrical activity. While these studies have their respective places in diagnostic medicine, they are limited in their ability to detect sporadic events such as paroxysmal atrial fibrillation in the former case, or a seizure event in the latter. Just as cardiologists have adopted Holter monitoring into clinical practice, so too have neurologists turned to ambulatory EEG for certain diagnostic purposes. We discuss the clinical indications for ambulatory EEG.

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01 March, 2019

Reusable EEG Electrodes May Put Patients at Risk of Infection

Reusable electroencephalographic (EEG) electrodes are under investigation as a potential source of hospital-acquired infection (HAI). Because the traditional EEG procedure involves abrasion of the skin, EEG electrodes are considered semi-critical devices, which require sterilization or high-level disinfection. Inadequately cleaned reusable cup electrodes may harbor bacteria, blood, and microscopic epithelial cells. Indeed, a break in the skin that occurs when applying EEG scalp electrodes creates the risk of infection from blood-borne pathogens such as HIV, Hepatitis-C, and Creutzfeldt-Jacob Disease.

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27 February, 2019

EEG For Sports Concussion Assessment

Concussion is an important and significant risk for young athletes

Long gone are the days when athletes were encouraged to shake off a concussion and get back to play as soon as possible. With so many children and teens playing contact sports, concussion has rightfully become an important public health issue. The American Academy of Neurology (AAN) describes concussion as “a form of mild traumatic brain injury (TBI)” and that it “is a common consequence of trauma to the head in contact sports.” The number of concussions per year in the US is estimated to be between 1.6 to 3.8 million.1 While most concussions are mild and self-limiting, a minority produce long-term cognitive, physical, and psychosocial sequelae. Indeed the risk of long-term complications from concussion increases as the number of concussive episodes in a given patient increase. Unfortunately, it is not always immediately clear which concussions will be minor and of little lasting consequence, and which are a harbinger of chronic problems. Could EEG allow us to reliably assess the severity and prognosis of concussion?

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