Solving the Sitting Dilemma

Feb 7, 2014
Author: 
Erin Vollick

Milos PopovicA new wheelchair sensory system developed through a collaboration with SensiMAT Systems and the University of Toronto’s Professor Milos Popovic is poised to help wheelchair users prevent their number one source of infection, hospitalization, and mortality: pressure sores.

For those who use wheelchairs, sitting is serious business.

“Take for example, the sad story of Christopher Reeve,” says Popovic, Professor at the Institute of Biomaterials & Biomedical Engineering (IBBME) and Toronto Rehab Chair in Spinal Cord Injury Research at the Toronto Rehabilitation Institute (TRI). “After his injury Christopher Reeve and his foundation poured millions of dollars into stem cell research. But in the end, he died from a pressure sore that could have been prevented by this inexpensive solution.”

It was cases like Christopher Reeve’s that led to the creation of the SensiMAT.

“We had one of those discussions,” says Popovic of his fateful meeting with SensiMAT System’s David Mravyan and his father Michael in 2007. The father and son team had been visiting the Toronto Rehabilitation Institute’s (TRI) Research Day when they fell into conversation with Popovic. “I’d been churning around in my mind two or three ideas that could be turned into products. One of those was a sitting cushion. We talked about what it should do, which patients it could help,” describes Popovic, who was named one of the University of Toronto’s Inventors of the Year in 2013.

According to recent data, there are 2.2 million people who rely on wheelchairs in the U.S. and Canada alone. Up to 350,000 of that number suffer from spinal cord-specific injuries, a population with the highest risk of developing pressure sores – with a 95% lifetime incidence rate of developing an ulcer.Pressure sores are caused by poor circulation and increased pressure – for instance, from prolonged periods of sitting in place – where the skin and surrounding tissues become damaged. Even a small sore that is treated effectively still carries with it a high risk of infection that can lead to surgeries, hospitalization, and in some cases, death. The cost of treating pressure sores is estimated at 14 billion dollars annually.

The SensiMAT, though, is designed to help wheelchair users prevent pressure sores from forming in the first place. The system consists of a sensor-lined mat tailored to fit a wheelchair user’s existing cushion. Once the user sits in their chair, Bluetooth technology sends signals from the pressure-sensing mat to a smart phone app that alerts the user when – and where – pressure has begun to build up, following traffic light colours: red for trouble spots, green for pressure-free zones.

As alerts can be monitored remotely, the system is also ideal for caregivers of those who are immobile or unable to respond to the app alerts. The simple and versatile design has also been sought after by Occupational Therapists who want to track their patients’ level of activity outside the clinical setting.

But the SensiMAT isn’t just for the most vulnerable populations. As Mravyan explains, “During our research we found that even people who are very active in their chairs and who diligently complete their pressure reliefs are at risk of developing sores.”

SensiMAT, which patented the technology in 2012, is now looking at ways to expand the sensory system for use in long-term care facilities. Rather than waiting for set rotation hours, the SensiMAT system could alert caregivers that bed-bound patients need to be moved. Data can also be collected over the course of weeks or even months, and could help care facilities determine the level of health and care of their clients.

“What this system offers is a quality metric for long term care reporting,” Mravyan states.

The SensiMAT is currently undergoing testing at the Lyndhurst Centre, part of the Toronto Rehabilitation Institute. In March, SensiMAT Systems will launch a crowdfunding campaign to help the company bring this product to market. More info can be found at www.sensimatsystems.com or on Twitter @sensimat.

 

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