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Robotic Glove Invented by NUS Team Helps Patients Restore Hand Movements


News provided by

National University of Singapore

13 Jan, 2016, 09:00 GMT

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National University of Singapore Logo (PRNewsFoto/National University of Singapore) (PRNewsFoto/National University of Singapore)

SINGAPORE, Jan. 13, 2016 /PRNewswire/ -- Patients who have lost their hand functions due to injuries or nerve-related conditions, such as stroke and muscular dystrophy, now have a chance of restoring their hand movements by using a new lightweight and smart rehabilitation device called EsoGlove developed by a research team from the National University of Singapore (NUS).

Logo - http://photos.prnewswire.com/prnh/20151130/291548LOGO

The NUS team comprises Asst Prof Yeow, his clinical collaborator Dr Lim Jeong Hoon from the NUS Department of Medicine, as well as PhD candidate Mr Yap Hong Kai and undergraduate student Mr Benjamin Ang Wee Keong, who are both from the NUS Department of Biomedical Engineering.

Greater comfort and convenience

Conventional robotic devices for hand rehabilitation consist of rigid electromechanical components, which are heavy and uncomfortable for patients.

"EsoGlove is unique as it is made entirely of soft components and does not require complicated mechanical setups. The main body of the glove is made of fabric, with soft actuators embedded. It also has adjustable Velcro straps to cater to different hand sizes," Asst Prof Yeow said.

EsoGlove is connected to a pump-valve control system that modulates the air pressure which directs the soft actuators. When the actuators are pressurised by air, they apply distributed forces along the length of the finger to promote finger movements, such as bending, extending and twisting, to support different hand motions. This novel method does not constrain the finger's natural movements, unlike conventional devices that make use of rigid links and joints. Each actuator also functions independently, providing assistance to each finger separately.

The robotic glove can be applied in a table-top version for bedridden patients, as well as a waist-belt version for patients who are mobile and recovering at home.                                                                  

Smart control and assistance

EsoGlove uses an intuitive control mechanism that involves the coupling of electromyography and radio-frequency identification technologies. With this feature, the robotic glove can detect a patient's intent to perform a hand action on a particular object, such as picking up a pen or holding a mug. By interpreting the muscle signals of the wearer, the robotic glove can help the patient move the fingers to accomplish the specific tasks, involving objects of various shapes and sizes, in an intuitive manner.

Said Dr Lim, who is also a Senior Consultant at the National University Hospital's Division of Neurology, "With this unique approach, we can develop therapeutic tools using safe and wearable robotic technology. Patients can take the initiative in their own rehabilitative process, rather than being passive recipients of therapists' intervention."

"As the soft actuators in the EsoGlove are made from non-ferromagnetic materials, they are suitable for use in functional magnetic resonance imaging studies. We hope that the robotic glove can contribute towards investigating the brain's activity in relation to motor performance during hand rehabilitation, and unravel the functional effects of soft rehabilitation robotics on brain stimulation," added Mr Yap, who is also from the NUS Graduate School for Integrative Sciences and Engineering.

Clinical studies and commercialisation

Asst Prof Yeow and his team plan to start pilot clinical studies at the National University Hospital in February 2016 to validate the device's performance, as well as to obtain patient and clinical feedback so as to further refine the design of the device. The studies will take about six months, involving 30 patients.

The team has also filed a patent for EsoGlove, and will start a spin-off company to commercialise the device.

More information about the study:
https://news.nus.edu.sg/press-releases/9885-robotic-glove-by-nus

MEDIA CONTACT:

Carolyn FONG
National University of Singapore
DID: +65-6516-5399
Email: carolyn@nus.edu.sg

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