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Smart bandage checks chronic wounds in real-time

Justin Rowell by Justin Rowell
29.09.2022
Home Science

A new smart wearable sensor can conduct real-time, point-of-care assessment of chronic wounds wirelessly via an app, according to a new study.

The sensor detects temperature, pH, bacteria type, and inflammatory factors specific to chronic wounds within 15 minutes, allowing for fast and accurate wound assessment.

Given the rapidly aging population, healthcare providers are seeing more patients suffering from non-healing wounds such as diabetic foot and chronic venous leg ulcers. Estimates suggest that about 2% of the world’s population suffer from chronic wounds.

Infection and repeated trauma often interrupt the healing processes for these chronic wounds, leading to severe stress, pain, and discomfort to afflicted patients.

For patients with diabetic foot ulcers, this can lead to more severe outcomes such as foot amputation. Timely care and proper treatment of chronic wounds are needed to speed up wound recovery. However, this requires multiple clinical visits for lengthy wound assessment and treatment, which adds to the healthcare cost.

The new sensor, described in the journal Science Advances, can help mitigate these consequences and relieve patients with chronic wounds from unnecessary distress.

Point-of-care chronic wound assessment

Current clinical assessments of wounds rely on visual inspection, or collecting and sending wound fluid to a centralized lab to detect and analyze specific biomarkers. The whole process usually takes about one to two days and may impede proper, timely, and precise medical interventions.

Although there are recent developments in flexible sensors designed for wound care, they can only probe a limited set of markers such as acidity, temperature, oxygen, uric acid, and impedance to diagnose wound inflammation.

In response to these current limitations, the researchers developed VeCare, a point-of-care wound assessment platform consisting of an innovative wound sensing bandage, an electronic chip, and a mobile app.

“Our smart bandage technology [gives] patients the freedom to perform the test and monitor their wound conditions at home.”

The bandage comprises a wound contact layer, a breathable outer barrier, a microfluidic wound fluid collector, and a flexible immunosensor. VeCare is the first wound assessment platform that can detect bacteria type and probe inflammatory factors, in addition to measuring acidity and temperature, within a single 15-minute test.

The immunosensing bandage detects multiple chronic wound-specific biomarkers from wound fluid using an electrochemical system to allow for rapid assessment of the wound microenvironment.

The microfluidic wound fluid collector attached to the sensor directs and boosts wound fluid delivery to the sensor by up to 180%. The design ensures reliable sensing performance regardless of the ulcer shape or size. In addition, a chip integrated with flexible electronics is connected to the sensor to transmit data wirelessly to an app for convenient, real-time wound assessment and analysis onsite. The chip component, powered with a rechargeable battery, can be reused for subsequent applications.

Sensor allows for remote monitoring

The VeCare platform and mobile app allows doctors to monitor the condition of patients’ chronic wounds remotely, reducing the hassle for patients to travel to a clinic. The bandage complements the patient’s existing medical treatment while facilitating timely medical intervention for wound healing processes.

“Point-of-care devices coupled with telehealth or digital health capability can play a significant role in transforming the healthcare industry and our society, which is catalyzed by the COVID-19 pandemic requirements for safe distancing. Our smart bandage technology is the first of its kind designed for chronic wound management to give patients the freedom to perform the test and monitor their wound conditions at home,” says Lim Chwee Teck from the National University of Singapore’s (NUS) biomedical engineering department and director of the Institute for Health Innovation & Technology (iHealthtech).

In collaboration with the Singapore General Hospital, researchers conducted a small clinical test of VeCare on patients with chronic venous leg ulcers. They successfully demonstrated that the platform is effective in the assessment of chronic wounds and enabling monitoring of the progress of wound healing with timely medical intervention.

“The VeCare platform is easily scalable and customizable to accommodate different panels of biomarkers to monitor various types of wounds. The aim is to have an effective and easy to use diagnostic and prognostic tool for precise and data-driven clinical management of patients,” Lim says.

The next step for the research team is to further develop VeCare to meet safety, regulatory, and mass production considerations. The team will explore the incorporation of other appropriate biomarkers suitable for other wound types and utilize data in existing clinical workflows to improve diagnosis and treatment. They hope to test the technology on a larger prospective randomized clinical trial with different types of non-healing chronic ulcers such as diabetic foot and pressure ulcers.

Source: National University of Singapore

“The VeCare platform is easily scalable and customizable to accommodate different panels of biomarkers to monitor various types of wounds. The aim is to have an effective and easy to use diagnostic and prognostic tool for precise and data-driven clinical management of patients,” says Lim Chwee Teck. (Credit:

 

The post Smart bandage checks chronic wounds in real-time appeared first on Technovanguard.


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