Every heartbeat pushes pressure through your arteries, and that pressure shifts from moment to moment. Yet most people still measure it with a cuff that squeezes the arm, then stops. A research team in South Korea now reports a thin, skin-attachable ultrasound patch that tracks blood pressure continuously, without a cuff, by watching blood vessels expand and contract in real time. The promise is simple to feel in daily life. Blood pressure changes while you sleep, walk, stress, and recover. A cuff gives snapshots. A wearable patch could show the whole story. Research team at KIMM’s Department of Bionic Machinery (Dr. Shin Hur pictured on the left). (CREDIT: KIMM) Why Cuffless Blood Pressure Still Feels Hard You already know the tradeoff. A cuff can be accurate, but it feels bulky and inconvenient. It also tends to measure at set times, not continuously. That leaves gaps that matter for people who need close monitoring. Many cuffless approaches rely on light, often as optical sensors. The research team notes that optical methods can struggle with outside factors …