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Neurocritical Care

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01-04-2015 | Original Article

Characterization of the Relationship Between Intracranial Pressure and Electroencephalographic Monitoring in Burst-Suppressed Patients

Authors: Mark Connolly, Paul Vespa, Nader Pouratian, Nestor R. Gonzalez, Xiao Hu

Published in: Neurocritical Care | Issue 2/2015

Abstract

Background

The objective of this study is to characterize the relationship between ICP and EEG

Methods

Simultaneous ICP and EEG data were obtained from burst-suppressed patients and segmented by EEG bursts. Segments were categorized as increasing/decreasing and peak/valley to investigate relationship between ICP changes and EEG burst duration. A generalized ICP response was obtained by averaging all segments time-aligned at burst onsets. A vasodilatation index (VDI) was derived from the ICP pulse waveform and calculated on a sliding interval to investigate cerebrovascular changes post-burst.

Results

Data from two patients contained 309 bursts. 246 ICP segments initially increased, of which 154 peaked. 63 ICP segments decreased, and zero reached a valley. The change in ICP (0.54 ± 0.85 mmHg) was significantly correlated with the burst duration (p < 0.001). Characterization of the ICP segments showed a peak at 8.1 s and a return to baseline at 14.7 s. The VDI for increasing segments was significantly elevated (median 0.56, IQR 0.31, p < 0.001) and correlated with burst duration (p < 0.001).

Conclusions

Changes in the ICP and pulse waveform shape after EEG burst suggest that these signals can be related within the context of neurovascular coupling.

Significance

Existence of a physiological relationship between ICP and EEG may allow the study of neurovascular coupling in acute brain injury patients.

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Title: Characterization of the Relationship Between Intracranial Pressure and Electroencephalographic Monitoring in Burst-Suppressed Patients
Authors: Mark Connolly
Paul Vespa
Nader Pouratian
Nestor R. Gonzalez
Xiao Hu
Publication date: 01-04-2015
Publisher: Springer US
Published in: Neurocritical Care / Issue 2/2015
Print ISSN: 1541-6933
Electronic ISSN: 1556-0961
DOI: https://doi.org/10.1007/s12028-014-0059-8

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Characterization of the Relationship Between Intracranial Pressure and Electroencephalographic Monitoring in Burst-Suppressed Patients

Abstract

Background

Methods

Results

Conclusions

Significance

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

Significance

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