Painless skin patch collects fluid for diagnostic testing
(PHYSorg.com Chemistry)

Although blood contains a wealth of potential biomarkers of disease, it can be challenging to obtain and analyze. There`s the anxiety patients experience when a large needle has to be stuck into a vein, and for many tests, technicians need to separate plasma from serum. Now, researchers reporting in ACS Sensors have developed a skin patch containing tiny needles that painlessly collect interstitial fluid for on-patch diagnostic testing.