מושגי ליבה
An injectable, bioresorbable, and wireless metastructured hydrogel sensor can continuously monitor intracranial pressure, temperature, pH, and flow rate through wireless ultrasound measurements.
תקציר
The article presents an innovative injectable, bioresorbable, and wireless metastructured hydrogel (metagel) sensor for continuous monitoring of intracranial signals. The metagel sensor is a cube measuring 2 × 2 × 2 mm3 and encompasses biodegradable and stimulus-responsive hydrogels, as well as periodically aligned air columns with a specific acoustic reflection spectrum.
When implanted into the intracranial space using a puncture needle, the metagel sensor deforms in response to physiological changes, causing peak frequency shifts in the reflected ultrasound waves. These shifts can be wirelessly measured by an external ultrasound probe, allowing the sensor to independently detect intracranial pressure, temperature, pH, and flow rate.
The key highlights of the metagel sensor include:
Wireless and bioresorbable design to overcome the limitations of wired clinical instruments and existing wireless implantable devices
Ability to detect a wide range of intracranial parameters, including pressure, temperature, pH, and flow rate
Achieves a detection depth of up to 10 cm, enabling continuous monitoring
Almost fully degrades within 18 weeks, eliminating the need for surgical removal
Animal experiments on rats and pigs demonstrate promising multiparametric sensing performance comparable to conventional non-resorbable wired clinical benchmarks
The article emphasizes the significant potential of this innovative metagel sensor for improving the management and prognosis of various intracranial injuries and diseases through precise and continuous wireless monitoring of intracranial physiology.
סטטיסטיקה
The metagel sensor cubes measure 2 × 2 × 2 mm3 in size.
The metagel sensor can achieve a detection depth of up to 10 cm.
The metagel sensor almost fully degrades within 18 weeks.
ציטוטים
"Direct and precise monitoring of intracranial physiology holds immense importance in delineating injuries, prognostication and averting disease."
"Wireless implantable devices provide greater operational freedom but include issues such as limited detection range, poor degradation and difficulty in size reduction in the human body."