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December 1977

Nasopharyngeal Sleep EEGs in a Community Hospital Setting

Author Affiliations

Dept of Neurology The Medical College of Pennsylvania 3300 Henry Ave Philadelphia, PA 19129
EEG Laboratory Berkshire Medical Center Pittsfield, MA 01201

Arch Neurol. 1977;34(12):788. doi:10.1001/archneur.1977.00500240076017

To the Editor.—  For almost 30 years, nasopharyngeal (NP) EEG electrodes have been used to record epileptogenic discharges in the mesial temporal regions of the brain,1-3 but are not commonly used in community hospital EEG laboratories. Published studies using this technique included a rather preselected referral patient population.4-6 This study was conducted in a community hospital EEG laboratory over 18 months. Each of 72 patients having an NP sleep EEG had a recent history suggestive of complex partial seizures. Routine EEG findings were normal or inappropriate for the suspected diagnosis of complex partial seizures. Nasopharyngeal electrodes were placed by a neurologist, using standard insertion techniques.7 Sleep was obtained naturally or with chloral hydrate (500 to 1,500 mg). Twelve (16.6%) of the patients had paroxysmal abnormalities. Eight patients (11%) had findings in the NP electrodes; five (6.9%) had paroxysmal discharges only in the NP leads with no diagnosable

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