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Article: Systems analysis applied to intracranial pressure waveforms and correlation with clinical status in head injured patients

TitleSystems analysis applied to intracranial pressure waveforms and correlation with clinical status in head injured patients
Authors
KeywordsBrain: head injury
Measurement techniques: spectral analysis
Monitoring: intracranial pressure waveform
Issue Date1991
Citation
British Journal of Anaesthesia, 1991, v. 66, n. 4, p. 476-482 How to Cite?
AbstractIntracranial pressure waveforms (ICPWF) in head injured patients vary with the nature and severity of injury. Clinical interpretation of ICPWF shape is not defined. Spectral analysis provides an objective method of measuring changes in waveform shape, but the indices most suitable for clinical use remain unknown. Spectral analysis has been applied to ICPWF recorded from 30 patients with head injury, classified on clinical grounds into good, poor and intermediate groups. Normalized indices derived from ratios of certain characteristics of the ICP waveform to those of the arterial pressure (AP) waveform, were different (P < 0.05) in all groups. A simple index examined was the harmonic count ratio (Nc:Na) which decreased with increasing severity of injury. ICP/AP harmonic transfer functions were derived, and demonstrated a peaked response in the range 10-12 Hz. Increasing attenuation of this peaked response occurred with increasing severity of injury. These results suggest that transfer functions may be a clinically useful index of intracranial conditions. © 1991 Copyright: 1991 British Journal of Anaesthesia.
Persistent Identifierhttp://hdl.handle.net/10722/324976
ISSN
2023 Impact Factor: 9.1
2023 SCImago Journal Rankings: 2.397
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLin, E. S.-
dc.contributor.authorPoon, W.-
dc.contributor.authorHutchinson, R. C.-
dc.contributor.authorOh, T. E.-
dc.date.accessioned2023-02-27T07:28:41Z-
dc.date.available2023-02-27T07:28:41Z-
dc.date.issued1991-
dc.identifier.citationBritish Journal of Anaesthesia, 1991, v. 66, n. 4, p. 476-482-
dc.identifier.issn0007-0912-
dc.identifier.urihttp://hdl.handle.net/10722/324976-
dc.description.abstractIntracranial pressure waveforms (ICPWF) in head injured patients vary with the nature and severity of injury. Clinical interpretation of ICPWF shape is not defined. Spectral analysis provides an objective method of measuring changes in waveform shape, but the indices most suitable for clinical use remain unknown. Spectral analysis has been applied to ICPWF recorded from 30 patients with head injury, classified on clinical grounds into good, poor and intermediate groups. Normalized indices derived from ratios of certain characteristics of the ICP waveform to those of the arterial pressure (AP) waveform, were different (P < 0.05) in all groups. A simple index examined was the harmonic count ratio (Nc:Na) which decreased with increasing severity of injury. ICP/AP harmonic transfer functions were derived, and demonstrated a peaked response in the range 10-12 Hz. Increasing attenuation of this peaked response occurred with increasing severity of injury. These results suggest that transfer functions may be a clinically useful index of intracranial conditions. © 1991 Copyright: 1991 British Journal of Anaesthesia.-
dc.languageeng-
dc.relation.ispartofBritish Journal of Anaesthesia-
dc.subjectBrain: head injury-
dc.subjectMeasurement techniques: spectral analysis-
dc.subjectMonitoring: intracranial pressure waveform-
dc.titleSystems analysis applied to intracranial pressure waveforms and correlation with clinical status in head injured patients-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1093/bja/66.4.476-
dc.identifier.pmid2025475-
dc.identifier.scopuseid_2-s2.0-0025869918-
dc.identifier.volume66-
dc.identifier.issue4-
dc.identifier.spage476-
dc.identifier.epage482-
dc.identifier.isiWOS:A1991FH24100010-

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