Non-invasive Cerebrovascular Autoregulation Assessment Using the Volumetric Reactivity Index: Prospective Study
| Autor: | Saulius Rocka, Aidanas Preiksaitis, Laimonas Bartusis, Arminas Ragauskas, Yasin Hamarat, Vytautas Petkus, Romanas Chomskis, Solventa Krakauskaite, Erika Zubaviciute, Saulius Vosylius |
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| Rok vydání: | 2018 |
| Předmět: |
medicine.medical_specialty
Neurology business.industry Hemodynamics 030208 emergency & critical care medicine Blood volume Critical Care and Intensive Care Medicine Confidence interval 03 medical and health sciences 0302 clinical medicine Blood pressure Internal medicine Intensive care medicine Cardiology Neurology (clinical) Prospective cohort study business 030217 neurology & neurosurgery Intracranial pressure |
| Zdroj: | Neurocritical Care. 30:42-50 |
| ISSN: | 1556-0961 1541-6933 |
| Popis: | This prospective study of an innovative non-invasive ultrasonic cerebrovascular autoregulation (CA) monitoring method is based on real-time measurements of intracranial blood volume (IBV) reactions following changes in arterial blood pressure. In this study, we aimed to determine the clinical applicability of a non-invasive CA monitoring method by performing a prospective comparative clinical study of simultaneous invasive and non-invasive CA monitoring on intensive care patients. CA was monitored in 61 patients with severe traumatic brain injuries invasively by calculating the pressure reactivity index (PRx) and non-invasively by calculating the volumetric reactivity index (VRx) simultaneously. The PRx was calculated as a moving correlation coefficient between intracranial pressure and arterial blood pressure slow waves. The VRx was calculated as a moving correlation coefficient between arterial blood pressure and non-invasively-measured IBV slow waves. A linear regression between VRx and PRx averaged per patients’ monitoring session showed a significant correlation (r = 0.843, p |
| Databáze: | OpenAIRE |
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