Sami Farah Al-Rawas1, Khidir M Abdelbasit2, Huda Hussain Al-Lawati3, Rajesh Poothrikovil1, Amal Khalfan Al-Rawahi1, Abdul Aleem Khan4, Robert Shane Delamont5. 1. Department of Clinical Physiology/Clinical Neurophysiology, Sultan Qaboos University Hospital, Muscat, Oman. 2. Department of Mathematics and Statistics, College of Science, Sultan Qaboos University, Muscat, Oman. 3. Department of Pediatrics, Al-Nahdha Hospital, Muscat, Oman. 4. Department of Physiology, College of Medicine, Sultan Qaboos University, Muscat, Oman. 5. Department of Neurology, King's Neuroscience Centre, King's College Hospital, London, UK.
Abstract
OBJECTIVES: A measure to increase the electroencephalogram (EEG) outcome includes a short period of nap sleep during a routine standard EEG with the aim of increasing its sensitivity to interictal abnormalities or provoking seizures. As part of an ongoing auditing of our EEG data, we aimed to investigate the contribution of nap sleep during routine outpatient department based EEGs requested for a variety of reasons. METHODS: EEG data at the Department of Clinical Physiology at Sultan Qaboos University Hospital, Oman, from July 2006 to December 2007 and from January 2009 to December 2010 (total 42 months) were reviewed. The EEGs were for patients older than 13-years referred for possible epilepsy, blackouts, headache, head trauma, and other non-specified attacks. The recording period was between 20 to 40 minutes. Abnormalities were identified during waking and nap sleep periods. RESULTS: A total of 2 547 EEGs were reviewed and 744 were abnormal (29.2%). Of those abnormal EEGs, nap sleep was obtained in 258 (34.7%) EEGs, and 39 (15.1%) showed abnormalities during nap sleep. Nineteen out of the 39 (48.7%) EEGs were abnormal during awake and nap sleep; and 20 (51.3%) were abnormal during nap sleep, which represented only 2.7% of the total abnormal EEGs (n = 744). CONCLUSIONS: The contribution of the short nap sleep to the pickup rate of interictal abnormalities in EEG was minimal. We recommend the EEG service to include one cycle of spontaneous sleep EEG directed at patients with a history suggestive of epilepsy if their awake EEGs are normal.
OBJECTIVES: A measure to increase the electroencephalogram (EEG) outcome includes a short period of nap sleep during a routine standard EEG with the aim of increasing its sensitivity to interictal abnormalities or provoking seizures. As part of an ongoing auditing of our EEG data, we aimed to investigate the contribution of nap sleep during routine outpatient department based EEGs requested for a variety of reasons. METHODS: EEG data at the Department of Clinical Physiology at Sultan Qaboos University Hospital, Oman, from July 2006 to December 2007 and from January 2009 to December 2010 (total 42 months) were reviewed. The EEGs were for patients older than 13-years referred for possible epilepsy, blackouts, headache, head trauma, and other non-specified attacks. The recording period was between 20 to 40 minutes. Abnormalities were identified during waking and nap sleep periods. RESULTS: A total of 2 547 EEGs were reviewed and 744 were abnormal (29.2%). Of those abnormal EEGs, nap sleep was obtained in 258 (34.7%) EEGs, and 39 (15.1%) showed abnormalities during nap sleep. Nineteen out of the 39 (48.7%) EEGs were abnormal during awake and nap sleep; and 20 (51.3%) were abnormal during nap sleep, which represented only 2.7% of the total abnormal EEGs (n = 744). CONCLUSIONS: The contribution of the short nap sleep to the pickup rate of interictal abnormalities in EEG was minimal. We recommend the EEG service to include one cycle of spontaneous sleep EEG directed at patients with a history suggestive of epilepsy if their awake EEGs are normal.
Authors: Steve A Gibbs; Paola Proserpio; Michele Terzaghi; Andrea Pigorini; Simone Sarasso; Giorgio Lo Russo; Laura Tassi; Lino Nobili Journal: Sleep Med Rev Date: 2015-05-19 Impact factor: 11.609
Authors: Sándor Beniczky; Harald Aurlien; Jan C Brøgger; Anders Fuglsang-Frederiksen; António Martins-da-Silva; Eugen Trinka; Gerhard Visser; Guido Rubboli; Helle Hjalgrim; Hermann Stefan; Ingmar Rosén; Jana Zarubova; Judith Dobesberger; Jørgen Alving; Kjeld V Andersen; Martin Fabricius; Mary D Atkins; Miri Neufeld; Perrine Plouin; Petr Marusic; Ronit Pressler; Ruta Mameniskiene; Rüdiger Hopfengärtner; Walter van Emde Boas; Peter Wolf Journal: Epilepsia Date: 2013-03-18 Impact factor: 5.864