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Article: Application of time-frequency analysis to somatosensory evoked potential for intraoperative spinal cord monitoring

TitleApplication of time-frequency analysis to somatosensory evoked potential for intraoperative spinal cord monitoring
Authors
KeywordsMedical sciences
Psychiatry and neurology medical sciences
Surgery
Issue Date2003
PublisherB M J Publishing Group. The Journal's web site is located at http://www.jnnp.com/
Citation
Journal Of Neurology Neurosurgery And Psychiatry, 2003, v. 74 n. 1, p. 82-87 How to Cite?
AbstractObjective: To investigate the improvement in the reliability of intraoperative spinal cord monitoring by applying time-frequency analysis to somatosensory evoked potentials (SEP). Methods: 34 patients undergoing scoliosis surgery were studied. SEP were recorded during different stages of scoliosis surgery. Averaged SEP signals were analysed intraoperatively by short time Fourier transform (STFT). The time-frequency characteristics of SEP were observed during surgery. The main peak in the time-frequency interpretation of SEP was measured in peak time, peak frequency, and peak power. The changes in these variables were compared with the changes in latency and amplitude during different surgical stages. Results: During different surgical stages, changes in peak times and peak powers were found to correlate with the changes in latency and amplitude, respectively. Peak time showed more variability than latency (p < 0.01), while peak power showed less variability than amplitude (p < 0.01). The peak frequency of SEP appeared to be unchanged during surgery. SEP signals were found to have specific time-frequency characteristics, with the time-frequency distribution of the signals being located in a particular time-frequency space. Conclusions: Time-frequency analysis of SEP waveforms reveals stable and easily identifiable characteristics. Peak power is recommended as a more reliable monitoring parameter than amplitude, while peak time monitoring was not superior to latency measurement. Applying time-frequency analysis to SEP can improve the reliability of intraoperative spinal cord monitoring.
Persistent Identifierhttp://hdl.handle.net/10722/42165
ISSN
2015 Impact Factor: 6.431
2015 SCImago Journal Rankings: 2.913
PubMed Central ID
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHu, Yen_HK
dc.contributor.authorLuk, KDKen_HK
dc.contributor.authorLu, WWen_HK
dc.contributor.authorLeong, JCYen_HK
dc.date.accessioned2007-01-08T02:30:42Z-
dc.date.available2007-01-08T02:30:42Z-
dc.date.issued2003en_HK
dc.identifier.citationJournal Of Neurology Neurosurgery And Psychiatry, 2003, v. 74 n. 1, p. 82-87en_HK
dc.identifier.issn0022-3050en_HK
dc.identifier.urihttp://hdl.handle.net/10722/42165-
dc.description.abstractObjective: To investigate the improvement in the reliability of intraoperative spinal cord monitoring by applying time-frequency analysis to somatosensory evoked potentials (SEP). Methods: 34 patients undergoing scoliosis surgery were studied. SEP were recorded during different stages of scoliosis surgery. Averaged SEP signals were analysed intraoperatively by short time Fourier transform (STFT). The time-frequency characteristics of SEP were observed during surgery. The main peak in the time-frequency interpretation of SEP was measured in peak time, peak frequency, and peak power. The changes in these variables were compared with the changes in latency and amplitude during different surgical stages. Results: During different surgical stages, changes in peak times and peak powers were found to correlate with the changes in latency and amplitude, respectively. Peak time showed more variability than latency (p < 0.01), while peak power showed less variability than amplitude (p < 0.01). The peak frequency of SEP appeared to be unchanged during surgery. SEP signals were found to have specific time-frequency characteristics, with the time-frequency distribution of the signals being located in a particular time-frequency space. Conclusions: Time-frequency analysis of SEP waveforms reveals stable and easily identifiable characteristics. Peak power is recommended as a more reliable monitoring parameter than amplitude, while peak time monitoring was not superior to latency measurement. Applying time-frequency analysis to SEP can improve the reliability of intraoperative spinal cord monitoring.en_HK
dc.format.extent1069527 bytes-
dc.format.extent25600 bytes-
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dc.format.extent2377 bytes-
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dc.format.mimetypeapplication/pdf-
dc.format.mimetypetext/plain-
dc.languageengen_HK
dc.publisherB M J Publishing Group. The Journal's web site is located at http://www.jnnp.com/en_HK
dc.relation.ispartofJournal of Neurology Neurosurgery and Psychiatryen_HK
dc.rightsJournal of Neurology, Neurosurgery and Psychiatry. Copyright © B M J Publishing Group.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectMedical sciencesen_HK
dc.subjectPsychiatry and neurology medical sciencesen_HK
dc.subjectSurgeryen_HK
dc.subject.meshEvoked-Potentials,-Somatosensory-physiology-
dc.subject.meshMonitoring,-Intraoperative-methods-
dc.subject.meshSignal-Processing,-Computer-Assisted-
dc.subject.meshSpinal-Cord-physiology-
dc.titleApplication of time-frequency analysis to somatosensory evoked potential for intraoperative spinal cord monitoringen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-3050&volume=74&issue=1&spage=82&epage=87&date=2003&atitle=Application+of+time--frequency+analysis+to+somatosensory+evoked+potential+for+intraoperative+spinal+cord+monitoringen_HK
dc.identifier.emailHu, Y:yhud@hku.hken_HK
dc.identifier.emailLuk, KDK:hcm21000@hku.hken_HK
dc.identifier.emailLu, WW:wwlu@hku.hken_HK
dc.identifier.authorityHu, Y=rp00432en_HK
dc.identifier.authorityLuk, KDK=rp00333en_HK
dc.identifier.authorityLu, WW=rp00411en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1136/jnnp.74.1.82en_HK
dc.identifier.pmid12486272en_HK
dc.identifier.pmcidPMC1738163-
dc.identifier.scopuseid_2-s2.0-0037228970en_HK
dc.identifier.hkuros79406-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037228970&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume74en_HK
dc.identifier.issue1en_HK
dc.identifier.spage82en_HK
dc.identifier.epage87en_HK
dc.identifier.isiWOS:000180207400019-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHu, Y=7407116091en_HK
dc.identifier.scopusauthoridLuk, KDK=7201921573en_HK
dc.identifier.scopusauthoridLu, WW=7404215221en_HK
dc.identifier.scopusauthoridLeong, JCY=35560782200en_HK

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