Scientists at Wake Forest University School of Medicine in the United States have developed a battery free wearable patch that can screen for skin cancer earlier and more accurately. The relevant results were published in the latest issue of the journal Biomedical Innovation. Skin cancer, especially melanoma, is one of the most dangerous types of cancer. Early detection is crucial for treatment, but currently it mainly relies on visual examination by doctors, which is subjective and prone to overlooking early lesions. More precise diagnostic methods, such as biopsy and imaging examinations, are usually only carried out in professional medical institutions. To this end, the research team has designed a flexible patch that does not require chips or batteries, which can be directly attached to the surface of the skin and operated wirelessly with a portable reader. This new patch can measure the electrical characteristics of skin lesions in a non-invasive manner, known as' bioimpedance '. Biological impedance reflects the smoothness of electrical signal transmission in living tissues. The electrical characteristics of cancerous areas are often different from those of healthy skin. By measuring biological impedance, patches can identify abnormal areas that require further medical evaluation. Standard statistical methods have confirmed that there is a significant difference between healthy skin and abnormal skin. Research has shown that regardless of skin tone, this patch can clearly distinguish healthy skin from suspicious spots and capture unique electrical signals from moles or lesions. Unlike subjective visual inspection, this patch can provide objective numerical data, thereby reducing unnecessary biopsies, lowering the risk of missed diagnosis and misdiagnosis, and improving patient treatment outcomes. In addition, the patch generates non visual digital data, which not only protects patient privacy but also facilitates storage and sharing of test results. (New Society)