Sweat sensor patch could replace needles for kidney checks

This study tested a small, flexible patch that sticks to the skin and collects sweat to measure sodium and creatinine levels. These substances can indicate how well the kidneys are working and whether the body is dehydrated. The goal is to develop a non-invasive way to monitor kidney health without needing blood draws. Five adults with kidney disease wore the patch while sweating was induced, and the results were compared to standard lab tests.