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New Research Reports on Interventions that May Alter the Course of Epilepsy Diagnosis and Management
Date:12/5/2008

Data to be Presented at 62nd Annual Meeting of the American Epilepsy Society

SEATTLE, Dec. 5 /PRNewswire/ -- New studies presented at the 62nd annual meeting of the American Epilepsy Society (AES) will preview interventions that may alter the course of epilepsy diagnosis and management to improve the care of people living with this common neurological condition. These studies are among the hundreds of developments in the basic science and treatment of epilepsy and other seizure disorders being presented by thousands of scientists, researchers and clinicians at the conference.

Early diagnosis and treatment that quickly achieves seizure freedom with nominal side effects is the key goal to epilepsy management. Three studies highlighted at the AES annual meeting address this goal from different vantage points:

  • The course to seizure freedom? Identifying factors that may change the landscape of epilepsy treatment to improve patients' quality of life.
  • New EEG technology that may facilitate accurate seizure screening by non-specialists in urgent care settings.
  • Task force report on disparity in standards for Epilepsy Monitoring Units amidst rise in number of epilepsy treatment centers.

"Each clue we uncover in understanding epilepsy and how to suppress the disruptions it causes for those affected takes us closer to the goal of successfully treating this chronic condition. Data from this year's meeting lead us towards answers about characteristics we can focus on to more effectively diagnose and treat epilepsy," said Dennis D. Spencer, M.D., AES President, Harvey and Kate Cushing Professor and Chair of Neurosurgery, Yale University School of Medicine. "This is especially critical because we know that an estimated one-third of seizures are not controlled with existing therapies."

Epilepsy Patients Achieving Seizure Freedom More Quickly, According to New Analysis

An analysis of epilepsy patients demonstrated that the time to seizure freedom significantly decreased by 10% every year from 1995 to 2005, according to data presented by Jukka Peltola, MD, PhD, Department of Neurology, Tampere University Hospital, Tampere, Finland.

Dr. Peltola and his colleagues studied records of 571 epilepsy patients aged nine to 78 years, who were diagnosed and treated in Tampere University Hospital from 1995 to 2005. Using various methods of analysis, they identified the amount of time for 70% of patients to achieve seizure freedom:

  • Patients diagnosed in 1995-1998: 10 years.
  • Patients diagnosed in 1999-2001: 6 to 7 years.
  • Patients diagnosed in 2002-2005: 4 years.

"The first-line treatment protocol has not changed over the duration of this study in Finland, but several other changes in the landscape may have contributed to this positive trend. These include new second- and third-line agents, earlier and more aggressive intervention, and greater access to advanced MRI and EEG technology," explained Dr. Peltola. "We are actively analyzing this data further to ascertain the reasons for the decrease in time to seizure freedom. If identified, this could make an important clinical difference."

New EEG Technology -- a Seizure Vector Algorithm -- Facilitates Seizure Screening in Urgent Care Settings

A group of researchers from Infinite Biomedical Technologies (IBT) and The Johns Hopkins University School of Medicine presented findings demonstrating the accuracy of investigational screening technology designed to assess if a patient's symptoms should be classified as a seizure or another condition.

"Access to an EEG reading, the gold standard for identifying and classifying seizures, is limited in most urgent care settings. Often the EEG machine and/or technologists are not readily available to the Emergency Department (ED), and eventual diagnosis by a specialist may be delayed for hours, or in some cases days," said study author Peter W. Kaplan, MB, FRCP, Professor of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD.

To address this problem, the collaborative team, with grant support from the National Institutes of Health, designed the Seizure Vector (SV) algorithm to express EEG readings as a numeric seizure score. Based on the score, ED staff could quickly classify and triage patients. Potential classifications include:

  • Epileptic seizures: refer to a neurologist for further evaluation.
  • Non-epileptic events: refer for neurological, medical or psychiatric evaluation.

The team's hope is that this technology, when used in the ED setting, will enable first-response personnel to screen for seizures in patients and make rapid triage decisions, such as timely referral to a specialist for evaluation, diagnosis and treatment.

To validate the algorithm, researchers collected EEGs from 40 adults with a variety of seizure types, and a blinded epileptologist classified them into "normal" or "seizure" categories. A total of 2,035 episodes of seizures and 3,867 episodes of normal data were recorded. When the SV algorithm was applied to the same recordings, it differentiated between "seizure" and "normal" episodes with 95.0% sensitivity and 95.2% specificity.

Surveys Reveal Lack of Consensus on Patient Care, Safety Measures in Epilepsy Monitoring Units

A new AES survey of physicians and nurses provided the basis for a working group discussion at this week's meeting regarding a need for the creation of standards in patient care and safety measures in epilepsy monitoring units (EMUs) across the United States.

Patients are admitted to EMUs to determine if they are having seizures, to consider if surgery is an option, for medication changes, or other diagnostic procedures. Some of the monitoring procedures require sleep deprivation and/or taking patients off medications to provoke seizures for simultaneous recording of symptoms and related brain wave activity.

The surveys evaluated EMU practices related to these monitoring procedures, as well as patient supervision. Results revealed discrepancies across EMUs in these areas, with relatively few physicians and nurses reporting that their facilities had protocols in place for seizure monitoring or patient supervision.

"In the continuum of patient care, EMUs are critically important and can significantly drive outcomes," said EMU Study Group member Gregory L. Barkley, MD, Clinical Vice Chair, Department of Neurology, Henry Ford Hospital. "This is why the AES has made it a priority to examine EMUs and formulate best practices and guidelines that will establish a standard, increase efficiency and, most importantly, improve patient outcomes."

About the American Epilepsy Society (AES)

AES is a 3,000 member society of physicians and scientists working to improve and advance the treatment of seizures through the promotion of research and education of professionals dedicated to the prevention, treatment and cure of epilepsy.

About Epilepsy

An estimated three million people in the United States have active epilepsy. Among its many causes are genetic factors, head trauma, brain infections, toxins, and complications of birth. Medications are the first line therapy. Brain surgery, electrical stimulation therapy, and, in some children, the ketogenic diet are other forms of therapy that may be used to control or eliminate seizures.

A Multi-Parametric Seizure Screening Algorithm for Clinical EEG

Watson AC, Sherman DL, Kaplan PW, et al.

Abstract # 3.11

Poster presentation on Monday, December 8, 2008 from 8:00 am to 1:30 pm in Convention Center Hall 4B

Decrease in "time to maximum seizure freedom" by year of diagnosis: A new approach to evaluate trend of overall success in epilepsy treatment

Falah M, Kharazmi E, Kolios S, et al.

Abstract # 1.179

Poster presentation on Saturday, December 6 from 1:00 pm to 6:00 pm in Convention Center Hall 4B

Expert Consensus Process on Patient Safety in the Epilepsy Monitoring Unit

Janice M. Buelow, RN, PhD, Chair

Symposium: Saturday, December 6, 2008, 9:00 am to 12:00 pm, Convention Center Ballroom 6E

    Contacts:
    Peter Van Haverbeke/703-960-1213
    E-mail: pvanhaverbeke@aesnet.org
    Natalie Judd/203-605-9515
    E-mail: natalie@bigvoicecomm.com

    In Seattle 12/4-12/9:
    American Epilepsy Society Annual Meeting
    Press Room: 601, Washington State Convention & Trade Center
    Phone: (206) 219-4702


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SOURCE American Epilepsy Society
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