Conformal 4×5 Array for Central Blood Pressure Monitoring
This conformal ultrasonic device enables non-invasive, continuous monitoring of central blood pressure waveforms from deeply embedded vessels. The 4×5 array of 1–3 piezoelectric composites uses stretchable island-bridge interconnects encapsulated in 240 µm silicone. It conforms to the neck without gel or applied pressure, operating at 7.5 MHz with 0.81 k₃₃ and 0.77 µm axial resolution. Carotid artery and jugular venous waveforms are demonstrated, along with pressure amplification from central to peripheral arteries and pulse wave velocity calculation.
Parameter | Value |
|---|---|
Array Configuration | 4 × 5 (20 elements) |
Center Frequency | 7.5 MHz |
Bandwidth (‑6 dB) | 32% |
Piezoelectric Material | 1–3 PZT/epoxy composite |
Element Footprint | 0.9 × 0.9 mm |
Electromechanical Coupling (k₃₃) | 0.81 |
Device Thickness | 240 μm |
Stretchability (x‑direction) | 60% (max), 30% (reversible) |
Axial Resolution | 0.77 μm |
Penetration Depth | >4 cm |
Encapsulation | Ecoflex silicone |
Measurement Sites | Carotid, jugular, brachial, radial, pedal |
Demonstrated Waveforms | Arterial (systolic peak, dicrotic notch); Venous (A, C, V peaks) |
Contact us for purchase or customization.
