Traumatic Brain Injury Clinical Trial
Official title:
Evaluation and Application of Experimental Indices for the Study of Potential Prognostic Factors in Patients With Acute Neurological Injury, Using Low-frequency Sampled Data
The pressure reactivity index (PRx) has emerged as a surrogate method for the continuous bedside estimation of global cerebral autoregulation and a significant predictor of unfavorable outcomes. However, calculations require continuous, high-resolution monitoring and are currently limited to specialized ICUs with dedicated software. To overcome this problem, new indices calculated using one-minute average data, instead of 10-second average data as performed by the PRx, have been proposed. The study aims to test new physiological indices appropriately modified to adapt to the scarcity of output data generated by standard hospital systems (frequency ~0.0033 Hz, approximately a 5-minute period) and to evaluate their association with outcome measures.
Data preparation and index calculations were performed using an in-house algorithm. Data extracted and processed with the algorithm: Ultra-low pressure reactivity index (UL-PRx), Intracranial pressure (ICP), Cerebral perfusion pressure (CPP), Arterial blood pressure (ABP), heart rate (HR), respiratory rate (RR), temperature, end-tidal CO2 (EtCO2), saturation (SpO2). ;
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