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Anesteziologiya i Reanimatologiya

[Effect of normobaric hyperoxia on cerebral oxygenation, metabolism and oxidative stress in patients with subarachnoid hemorrhage caused by intracranial aneurysm rupture].

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Il collegamento viene salvato negli appunti
A A Solodov
S S Petrikov
E V Klychnikova
E V Tazina
V V Krylov
M A Godkov
L T Khamidova

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Astratto

The development of cerebral vasospasm in subarachnoid hemorrhage (SAH) due to cerebral aneurysms rupture results in cerebral circulation disturbances. Application of normobaric hyperoxia can be an effective way for improving of oxygen delivery to injured brain tissues. The purpose of this study was to assess of normobaric hyperoxia influence on intracranial pressure (ICP), cerebral oxygenation and metabolism, oxidative stress and endogenous factors of vascular regulation in II critically ill patients with nontraumatic SAH due to cerebral aneurysms rupture. Increase of FiO2 from 0.3 to 0.5 and 1.0 was accompanied with brain oxygen tension (PbrO2) increase and cerebral extraction ratio for oxygen (O2ER) decrease. Application of normobaric hyperoxia had no effect on ICP, cerebral perfusion pressure, arterial blood pressure and cerebral metabolism. The results obtained from patients with nontraumatic SAH showed an evident increase of oxidative stress which had a significant effect on vascular endothelial function, causing an imbalance in the endogenous regulation of vascular tone. Application of normobaric hyperoxia was not accompanied by an increase of free-radical processes in critically ill patients with nontraumatic SAH due to cerebral aneurysms rupture.

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