Daijiworld Media Network - New Delhi

New Delhi, Aug 10: In a major breakthrough for wearable health tech, researchers from Seoul National University have created a skin-adhering electronic patch capable of continuously and non-invasively monitoring blood pressure in real time. The innovation challenges traditional methods that rely on bulky, cuff-based monitors, offering a more convenient and patient-friendly alternative.

Published in Advanced Functional Materials, the study outlines how the compact, flexible patch tracks both systolic and diastolic blood pressure using synchronized electrical (ECG) and mechanical (pulse) signals from each heartbeat.

“This research challenges the conventional belief that blood pressure measurement is inconvenient and sufficient only once a day,” said Professor Seung Hwan Ko, lead author of the study. “Our system introduces a new health care interface capable of real-time physiological monitoring.”

How It Works

The patch leverages a key physiological insight: the time difference between ECG and pulse signals varies depending on blood pressure levels. Using this principle, the device can provide continuous and accurate readings throughout the day.

To ensure the device adheres comfortably to skin and detects even the most subtle changes in blood flow, the team developed it using a stretchable, skin-like material known as liquid metal. This material remains fluid at room temperature, conducts electricity efficiently, and matches the elasticity of human skin.

Advanced Fabrication

Because of liquid metal's high surface tension, the researchers employed a novel method called laser sintering — using a laser to selectively fuse liquid metal particles into circuits only in precise areas. This approach allows the device to maintain both flexibility and durability.
Tests showed the patch retained full functionality even after being stretched to 700% of its original length and enduring over 10,000 cycles of repeated stretching.

A Game-Changer for Hypertension Management

With only 21% of the estimated 1.3 billion people with hypertension effectively managing their condition globally, this innovation could significantly improve long-term health outcomes by enabling continuous, real-time monitoring — a critical step forward in proactive cardiovascular care.

The wearable patch opens doors to a future where blood pressure can be tracked as easily and passively as a fitness stat, potentially transforming how we monitor and manage one of the world’s most pressing health issues.