• Erasmo Barros da Silva Junior, Eder Eidi Hamasaki, Hamzah Youssef Smaili, Arthur Wozniak, Enézio Satoru Yoshida Tristão, LoureiroMarcelo de PaulaMPDepartment of Industrial Biotechnology, Universidade Positivo, Curitiba, Brazil., Jerônimo Buzetti Milano, Murilo Sousa de Meneses, Rafael Martinelli de Oliveira, and Ricardo Ramina.
• Department of Neurosurgery, Instituto de Neurologia de Curitiba, Curitiba, Brazil.
• Neurosurgery. 2023 Mar 1; 92 (3): 647656647-656.

BackgroundContinuous invasive monitoring of intracranial pressure (ICP) is essential in neurocritical care for surveillance and management of raised ICP. Fluid-based systems and strain gauge microsensors remain the current standard. In the past few decades, several studies with wireless monitoring were developed aiming to reduce invasiveness and complications.ObjectiveTo describe a novel Wi-Fi fiber-optic device for continuous ICP monitoring using smartphone in a swine model.MethodsTwo ICP sensors (wireless prototype and wire-based reference) were implanted in the cerebral parenchyma of a swine model for a total of 120 minutes of continuous monitoring. Every 5 minutes, jugular veins compression was performed to evaluate ICP changes. The experimentation was divided in 3 phases for comparison and analysis.ResultsPhase 1 showed agreement in ICP changes for both sensors during jugular compression and releasing, with a positive and strong Spearman correlation (r = 0.829, P < .001). Phase 2 started after inversion of the sensors in the burr holes; there was a positive and moderately weak Spearman correlation (r = 0.262, P < .001). For phase 3, the sensors were returned to the first burr holes; the prototype behaved similarly to the reference sensor, presenting a positive and moderately strong Spearman correlation (r = 0.669, P < .001).ConclusionA Wi-Fi ICP monitoring system was demonstrated in a comprehensive and feasible way. It was possible to observe, using smartphone, an adequate correlation regarding ICP variations. Further adaptations are already being developed.Copyright © Congress of Neurological Surgeons 2022. All rights reserved.

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