Key result
Lead-free KNN-based wearable ultrasonic patches (5 MHz, 2.8 x 2.8 mm) successfully measured variations in vessel diameters on a simulated radial artery platform.
Why the study?
To enhance the biocompatibility of wearable ultrasound blood pressure monitors using lead-free potassium sodium niobate-based materials.
Can lead-free KNN-based wearable ultrasonic patches effectively measure variations in vessel diameters to monitor blood pressure?
Can lead-free KNN-based wearable ultrasonic patches effectively measure variations in vessel diameters to monitor blood pressure?
Lead-free KNN-based wearable ultrasonic patches can effectively measure vessel diameter variations in a simulated platform, offering a potential future method for continuous, non-invasive blood pressure monitoring.
Ultrasound is one of the most promising methods for blood pressure monitoring due to its harmless, non-invasive, and high-precision characteristics. To further enhance the biocompatibility of ultrasound blood pressure monitors, this work reports wearable ultrasonic patches for blood pressure monitoring based on lead-free KNN (potassium sodium niobate)-based materials. The patches are designed and fabricated with a center frequency of 5 MHz and dimensions of 2.8 mm × 2.8 mm, optimized for both electrical impedance matching and vascular detection. Moreover, biocompatible silicone rubber is used for the packaging. The wearable ultrasonic patches are demonstrated to effectively transmit and receive signals. The diameter of artificial blood vessels is measured to validate the vascular diameter detection capability of the patches. The relationship between blood pressure and vascular diameter is then calculated. A radial artery vascular system platform is built to simulate changes in human blood pressure. Finally, the patches are shown to successfully measure the variation in vessel diameters on this platform. These patches exhibit sufficient detection ability, good biocompatibility, and can adhere tightly to human skin without coupling agents, providing the possibility for safe, sustainable, comfortable, and wearable long-term blood pressure monitoring.
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Sun et al. (2025) studied Blood pressure monitoring. Lead-free KNN-based wearable ultrasonic patches was evaluated on Vessel diameter variation measurement. Lead-free KNN-based wearable ultrasonic patches (5 MHz, 2.8 x 2.8 mm) successfully measured variations in vessel diameters on a simulated radial artery platform.
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