Diabetes affects hundreds of millions of people worldwide, and one of its most serious complications is the development of diabetic foot ulcers.
These open wounds often heal slowly because high blood sugar can damage blood vessels and nerves, reducing blood flow and making it harder for the body to fight infection.
If a wound becomes infected and treatment is delayed, the damage can spread deep into the tissue, sometimes leading to amputation. Doctors therefore stress the importance of detecting problems as early as possible.
A team of researchers has now developed a new smart wound patch that could make monitoring diabetic ulcers much easier and safer. The technology allows patients and healthcare providers to track changes in a wound in real time using only a smartphone. The research was published in the journal Advanced Functional Materials.
The new device combines a special wound dressing with tiny electronic components. Together, they can monitor several important signs that reveal whether a diabetic ulcer is healing properly or becoming more dangerous.
These signs include glucose levels, temperature, and acidity, also known as pH. Changes in these measurements can provide early warnings that a wound is worsening.
One of the most innovative features of the patch is its color-changing dressing. The researchers created the dressing using extremely thin fibers produced through a manufacturing method called electrospinning. These fibers are much thinner than a human hair and can respond to chemical changes in the wound environment.
When glucose levels rise or acidity changes in a way that suggests the wound is deteriorating, the dressing changes color. This means patients may be able to spot potential problems simply by looking at the patch. Such visual signals could provide an early warning before severe tissue damage develops.
The researchers wanted to go beyond simple color changes, however. They added an optoelectronic system that can measure these color changes more accurately than the human eye.
The patch contains a tiny light source and a sensor that measures reflected light. The system converts the color information into electronic signals, allowing wound conditions to be tracked more precisely.
Unlike ordinary photographs taken with a smartphone camera, the measurements are less affected by surrounding lighting conditions. This helps produce more reliable results and reduces the risk of inaccurate readings.
Another important advantage is that the patch does not require a battery. Instead, it uses near-field communication technology, the same basic technology used in contactless payments and some wireless devices.
When a smartphone is brought close to the patch, the phone supplies power wirelessly. The patch then collects information and sends the data back to the smartphone.
This battery-free design helps keep the patch lightweight, comfortable, and easy to use. Patients do not need to worry about charging batteries or connecting complicated equipment. Healthcare providers can also review wound information remotely, potentially helping them intervene earlier if problems arise.
The researchers believe this technology could improve quality of life for people with diabetes. Traditional monitoring often requires frequent clinic visits and sometimes repeated blood sampling. The new patch offers a noninvasive way to continuously monitor wound health without additional discomfort.
The project was led by Distinguished Professor Inkyu Park and involved researchers from KAIST, Hanbat National University, the Korea Institute of Machinery and Materials, and the California Institute of Technology.
According to Professor Park, the research originally began as an effort to reduce the burden faced by people with diabetes who must frequently monitor their condition. The work eventually expanded into a technology that may help detect serious complications before they become life-threatening.
The findings are promising because diabetic foot ulcers remain a major cause of hospitalization and amputation worldwide. Early detection is often the key to successful treatment.
By providing both easy-to-see visual warnings and detailed electronic measurements, the smart patch may help patients seek medical attention before severe complications develop.
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Source: KAIST.
