Toward long-term and high-precision multimodal intracranial biomarker monitoring

Long-term and high-precision intracranial biomarker monitoring is crucial for the diagnosis, prevention, and prognosis of various diseases. However, existing technologies are associated with several issues of poor measurement accuracy, inability to monitor long-term and inadequate biocompatibility. To address these, minimally invasive implantable ultrasound metagel sensors have been developed for monitoring intracranial pressure, temperature, pH, and blood flow velocity. The sensor can quickly respond to changes in ultrasound frequency for high-precision monitoring of key physiological signals compared to current clinical gold standards. Additionally, the hydrogel exhibits excellent biocompatibility and can degrade almost completely within 18 weeks, without causing hematological disorders or systemic inflammatory responses.