Early brain injury linearly correlates with reduction in cerebral perfusion pressure during the hyperacute phase of subarachnoid hemorrhage

Marbacher, Serge; Neuschmelting, Volker; Andereggen, Lukas; Widmer, Hans Rudolf; von Gunten, Michael; Takala, Jukka; Jakob, Stephan; Fandino, Javier (2014). Early brain injury linearly correlates with reduction in cerebral perfusion pressure during the hyperacute phase of subarachnoid hemorrhage. Intensive care medicine experimental, 2(1), p. 30. Springer 10.1186/s40635-014-0030-1

[img]
Preview
Text
s40635-014-0030-1.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (2MB) | Preview

BACKGROUND It is unclear how complex pathophysiological mechanisms that result in early brain injury (EBI) after subarachnoid hemorrhage (SAH) are triggered. We investigate how peak intracranial pressure (ICP), amount of subarachnoid blood, and hyperacute depletion of cerebral perfusion pressure (CPP) correlate to the onset of EBI following experimental SAH. METHODS An entire spectrum of various degrees of SAH severities measured as peak ICP was generated and controlled using the blood shunt SAH model in rabbits. Standard cardiovascular monitoring, ICP, CPP, and bilateral regional cerebral blood flow (rCBF) were continuously measured. Cells with DNA damage and neurodegeneration were detected using terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) and Fluoro-jade B (FJB). RESULTS rCBF was significantly correlated to reduction in CPP during the initial 15 min after SAH in a linear regression pattern (r (2) = 0.68, p < 0.001). FJB- and TUNEL-labeled cells were linearly correlated to reduction in CPP during the first 3 min of hemorrhage in the hippocampal regions (FJB: r (2) = 0.50, p < 0.01; TUNEL: r (2) = 0.35, p < 0.05), as well as in the basal cortex (TUNEL: r (2) = 0.58, p < 0.01). EBI occurred in animals with severe (relative CPP depletion >0.4) and moderate (relative CPP depletion >0.25 but <0.4) SAH. Neuronal cell death was equally detected in vulnerable and more resistant brain regions. CONCLUSIONS The degree of EBI in terms of neuronal cell degeneration in both the hippocampal regions and the basal cortex linearly correlates with reduced CPP during hyperacute SAH. Temporary CPP reduction, however, is not solely responsible for EBI but potentially triggers processes that eventually result in early brain damage.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Intensive Care, Emergency Medicine and Anaesthesiology (DINA) > Clinic of Intensive Care

UniBE Contributor:

Takala, Jukka and Jakob, Stephan

Subjects:

600 Technology > 610 Medicine & health

ISSN:

2197-425X

Publisher:

Springer

Language:

English

Submitter:

Alessandra Angelini

Date Deposited:

28 Jan 2016 16:17

Last Modified:

29 Jan 2016 07:12

Publisher DOI:

10.1186/s40635-014-0030-1

PubMed ID:

26266927

BORIS DOI:

10.7892/boris.74847

URI:

https://boris.unibe.ch/id/eprint/74847

Actions (login required)

Edit item Edit item
Provide Feedback