Detection of maximal cerebral vasodilation by correlation of arterial and intracranial pressure signals

Michael L. Daley, Harikrishnan Pasupathy, James T. Robertson, Charles Leffler

Research output: Contribution to journalArticle

Abstract

The overall objective of this research is to develop tools which may improve the care of accident victims with severe closed head-injury. With the use of a laboratory model, arterial and intracranial pressure signals were obtained under conditions of intact regulation of cerebral blood flow and massive dilation. During elevated intracranial pressure and intact regulation, positive pressure inhalation appears to briefly occlude venous flow into the cranial sinuses during inspiration. As a result, the intracranial pressure and arterial pressure signals are not similar. In contrast, when maximal dilation causes failure of regulation of cerebral blood flow, the intracranial pressure signal is approximately proportional to the arterial pressure signal. Comparison of the cross-correlation function derived from the intracranial and arterial pressure signals to the autocorrelation function of the arterial signal reveals that the two correlation functions are: 1) different during intact auto-regulation; and 2) nearly identical during dilation induced failure of regulation of cerebral blood flow.

Original languageEnglish (US)
Pages (from-to)243-244
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume16
Issue numberpt 1
StatePublished - 1994

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Cerebrovascular Circulation
Intracranial Pressure
Vasodilation
Arterial Pressure
Dilatation
Cranial Sinuses
Closed Head Injuries
Blood
Intracranial Hypertension
Inhalation
Accidents
Pressure
Autocorrelation
Research

All Science Journal Classification (ASJC) codes

  • Bioengineering

Cite this

Detection of maximal cerebral vasodilation by correlation of arterial and intracranial pressure signals. / Daley, Michael L.; Pasupathy, Harikrishnan; Robertson, James T.; Leffler, Charles.

In: Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, Vol. 16, No. pt 1, 1994, p. 243-244.

Research output: Contribution to journalArticle

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