Skip to main content

Doctors Are Using a New Device Called a Geodesic Sensor Net to Map the Location of Seizures Suffered by Epilepsy Patients

EGI's HydroCel Geodesic Sensor Net 

The HydroCel Geodesic Sensor Net holds each electrode in place with gentle radial compression that allows the Net to adjust to each patient's head shape, which prevents pressure points and gaps. Comfort is further enhanced by the elimination of scalp abrasion and the use of a mild, fragrance-free, saline-based electrolyte for routine EEGs, and a gel-based electrolyte for extended monitoring EEGs.

Patient-friendly EEG is a great tool to differentiate your services. 

Superior Patient Comfort

In study after study, patients report that they prefer EEGs performed with Geodesic Sensor Nets over conventional EEG sensor arrays. Patients report that the GSN is more comfortable than other EEG methods. Children are far less likely to cry because the process is rapid and abrasion-free. Patients also comment that the electrolyte formulation does not smell or damage their hair.

Superior Patient Safety

The Geodesic Sensor Net uses abrasion-free application methods and the electrodes themselves are held in place by gentle radial compression afforded by the unique geodesic tension structure. Because no abrasion is required, the scalp on the skin is not compromised, which reduces the risk of infection. Often, it is argued that mild abrasion during the course of skin preparation does not compromise the integrity of the skin. However, studies have shown that this is not an accurate assumption. For further information, see Bild, S. (1997). Detection of occult blood on EEG surface electrodes. American Journal of Electroneurodiagnostic Technology, 38, 251-257.


No Sedation

Sedating children to obtain useful EEG is often done in clinical settings. This is not required when you use the Geodesic Sensor Net; rapid application time and the comfortable fit make sedation unnecessary.


Patient Populations

Suitable for all patient ages and hair types (with the exception of corn rows and dreadlocks) Geodesic Nets have been used successfully with difficult-to-record populations, such as autistic children, elderly patients with dementia, and ADHD teens.

Quick Application Time

Application times for the routine monitoring HydroCel Geodesic Sensor Net range between 5 minutes for 32 channels to 15 minutes for 256 channels. EEG staff rapidly learn the application technique.


Complete Head Coverage

Complete head coverage ensures that all clinically relevant info is captured. Guaranteeing complete head coverage requires attention to both appropriate intersensor distance and coverage of the underside of the head.

The first aspect of complete head coverage refers to the intersensor distance (that is, how far apart one sensor is from another sensor). Smaller intersensor distances translate to a more accurate measurement of the voltage field.

The second aspect refers to coverage of the underside of the head (for example, below the ears, including the face). It is common to believe that electrodes on the inferior surface of the head do not pick up EEG. However, voltage fields generated by the brain are volume conducted throughout the entire head. Moreover, certain brain regions, such as the inferior temporal lobes and ventral aspects of the frontal lobe, are oriented such that the voltage fields generated by these brain regions are best detected by electrodes on the inferior surface of the head.

The consequence of incomplete head coverage is that clinically significant EEG signals can be missed by sparse electrode placement and by lack of electrode placement on the underside of the head. For detailed information, see:

Luu, P., Tucker, D. M., Englander, R., Lockfeld, A., Lutsep, H., & Oken, B. (2001). Localizing acute stroke-related EEG changes: Assessing the effects of spatial undersampling. Journal of Clinical Neurophysiology, 18, 302-317.


Various Channel Counts

The Geodesic EEG System 300 is available in 256-, 128-, 64- and 32-channel configurations. The 32-, 64-, and 128-channel Nets are available for all patient populations, from infants to adults. The 256-channel Nets are currently available for pediatric through adults.

Popular posts from this blog

What Is Continuous Spike-Wave in Slow Wave Sleep Syndrome? (A RARE EPILEPSY)

Image via Wikipedia Continuous spike-wave in slow wave sleep syndrome (CSWS) is a rare epilepsy syndrome in which children lose a wide range of developmental abilities, including language, motor skills, memory, and visuospatial skills. This syndrome occurs in school-aged children. Development prior to onset of CSWS may be normal, but children with CSWS often have some pre-existing learning difficulties. In many children there is no known cause of epilepsy, although some children are found to have abnormal brain formation or have a prior history of brain infection. We still do not understand how these structural changes result in the continuous EEG discharge.

Many, but not all, children with CSWS also have seizures. There can be many different seizure types, including absence, generalized tonic-clonic, and focal seizures. The seizures can be difficult to treat. Even in those who already had learning difficulties, there is a clear loss of skills across multiple deve…

Vitamin B12: The Most Important Nutrient You Need

Image via Wikipedia
Image by icethim via Flickr If you aren’t getting enough vitamin B12, it is indeed very important – and you may very well not be thinking about it. One reason you aren’t thinking about it is that we tend to fall in (and out!) of love with one nutrient at a time (such as vitamin C, beta carotene, lycopene and so on), and vitamin B12 isn’t the nutrient du jour. But the other reason you may not be thinking about it is … because you can’t. A deficiency of vitamin B12 can limit your ability to think clearly about anything! (More on that momentarily.)
Like all vitamins, B12 is an organic compound, made from carbons (as opposed to minerals, which are inorganic), and essential for our normal metabolic function and health. Also, like most vitamins, B12 plays a wide variety of roles in our metabolism. The short list of important effects B12 has on your health includes these: Vitamin B12 is essential for the manufacture of red blood cells; a deficiency leads to a cha…

Aloe Vera - diabetes, asthma, epilepsy, burns, sunburns, psoriasis and osteoarthritis

Introduction This fact sheet provides basic information about aloe vera—common names, uses, potential side effects, and resources for more information. Aloe vera's use can be traced back 6,000 years to early Egypt, where the plant was depicted on stone carvings. Known as the "plant of immortality," aloe was presented as a burial gift to deceased pharaohs.
What Aloe Vera Is Used ForTraditionally, aloe was used topically to heal wounds and for various skin conditions, and orally as a laxative.Today, in addition to traditional uses, people take aloe orally to treat a variety of conditions, including diabetes, asthma, epilepsy, and osteoarthritis. People use aloe topically for osteoarthritis, burns, sunburns, and psoriasis.Aloe vera gel can be found in hundreds of skin products, including lotions and sunblocks.The Food and Drug Administration (FDA) has approved aloe vera as a natural food flavoring. Aloe vera ...Lô Hội, Nha Đam..#1 (Photo credit: Vietnam Plants &…