Wearable offers new option for monitoring heart health

A team from Purdue University developed self-powered wearable triboelectric nanogenerators (TENGs) with polyvinyl alcohol (PVA)-based contact layers for monitoring cardiovascular health.

Photo
An invention may turn one of the most widely used materials for biomedical applications into wearable devices to help monitor heart health.
Source: Wenzhuo Wu/Purdue University

TENGs help conserve mechanical energy and turn it into power. "The PVA-based TENGs show great potential for self-powered biomedical devices and open doors to new technologies that use widely deployed biocompatible materials for economically feasible and ecologically friendly production of functional devices in energy, electronics and sensor applications," said Wenzhuo Wu, the Ravi and Eleanor Talwar Rising Star Assistant Professor of industrial engineering in Purdue's College of Engineering, who led the development team. 

"We transform PVA, one of the most widely used polymers for biomedical applications, into wearable, self-powered triboelectric devices which can detect the imperceptible degree of skin deformation induced by human pulse and capture the cardiovascular information encoded in the pulse signals with high fidelity."

Cardiovascular health is typically measured by echocardiogram to measure electrical activity in the heart or photoplethysmography that measures changes in blood volume in the peripheral microvasculature. "These technologies can often be invasive to patients and have not yet been adapted into wearables for personalized on-demand monitoring," Wu said. "TENGs with PVA blend contact layers produce fast readout with distinct peaks for blood ejection, blood reflection in the lower body, and blood rejection from the closed aortic valve, which may enable detection of common cardiovascular diseases such as cardiovascular disease, coronary artery disease and ischemic heart disease."

Wu said PVA offers a valuable opportunity as potential constituents in future wearable self-powered devices. The PVA-based triboelectric devices can harvest the mechanical energy from the human body and use such electric power to support the operations of other biomedical devices.

Wu said the PVA-based triboelectric devices can function as self-powered sensors to detect and monitor the mechanical activities from the human body in applications such as health monitoring, human-machine interface, teleoperated robotics, consumer electronics and virtual and augmented technologies.

The Purdue team's work is published in the journal Advanced Materials.

Subscribe to our newsletter

Related articles

Powering wearable sensors through human motion

Powering wearable sensors through human motion

Researchers have harvested kinetic energy that is produced by a person as they move around.

Withings’ wearable receives medical CE marking

Withings’ wearable receives medical CE marking

Withings announced the European availability of ScanWatch after receiving the CE marking for medical devices.

Converting human body motions into electricity

Converting human body motions into electricity

Bioengineers have invented a novel soft and flexible self-powered bioelectronic device that converts human body motions into electricity.

‘Smart’ shirt keeps tabs on the heart

‘Smart’ shirt keeps tabs on the heart

A flexible carbon nanotube fibers can be incorporated into clothing to function as wearable health monitors.

Diabetology 4.0: emerging technologies for diabetes care

Diabetology 4.0: emerging technologies for diabetes care

This overview introduces smart insulin delivery systems and more innovations that help patients and doctors guide decision-making in diabetes care.

Skin patch for early warning of strokes

Skin patch for early warning of strokes

Engineers developed a soft and stretchy ultrasound patch that can be worn on the skin to monitor blood flow through major arteries and veins deep inside a person’s body.

Soft sensors for monitoring pregnant women

Soft sensors for monitoring pregnant women

Researchers have developed three soft, flexible, wireless sensors that allow movement and provide more precise data than existing ones.

Hybrid materials advance wearable devices

Hybrid materials advance wearable devices

We spoke to wearables and medical device expert Professor John Rogers about the benefits, challenges, trends and innovation within the sector.

A new medical device for monitoring vital signs

A new medical device for monitoring vital signs

A new device consisting of a 3D-printed wristband can remotely monitor patients' vital signs, such as body temperature, oxygen saturation, pulse, and respiratory rate.

Popular articles

Subscribe to Newsletter