At a glance
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Cerebrovascular Hemodynamics and Neurocognitive Outcome in Patients With Acute Respiratory Distress Syndrome.
In Brief
An observational study evaluating Near-infrared spectroscopy-based assessement of cerebral autoregulation. for ARDS. Completed, enrolled 66 participants across 1 site.
Detailed Summary
The acute respiratory distress syndrome (ARDS) is a life-threatening disease with functional impairment of the lung. It is characterized by an excessive inflammatory response of lung tissue, capillaries, and blood vessels and is associated with high mortality. Patients who survive the acute phase of this critical disease often suffer from long-term physical, psychological, and mental sequelae, as well as persistent cognitive deficits. In healthy individuals, autoregulatory mechanisms of the intracranial blood vessels keep blood supply to the brain independent of fluctuations in systemic blood pressure. In the case of a serious illness, these mechanisms of autoregulation may be impaired, which may favor cerebral hypoperfusion. Impairment of cerebrovascular hemodynamics can lead to neuronal damage in short and long term. The aim of this project is to investigate cerebrovascular autoregulation in adult patients with ARDS and to evaluate the cognitive outcome at 3, 6 and 12 months after discharge from the intensive care unit.
Study Details
Timeline
Interventions
Cerebral autoregulation is assessed using a software that calculates correlation coefficients based on the values of cerebral oxygenation (detected by near-infrared spectroscopy) and invasively measured arterial blood pressure. Correlation coefficients are calculated at 10-second intervals and averaged over a period of 300 seconds, resulting in an autoregulation index (cerebral oxygenation index, COx). The index can range between -1 and +1. It provides information about cerebral autoregulation capacity, with a value below 0.3 indicating intact cerebral autoregulation.