Microcirculation Analysis or nailfold capillaroscopy, is used for early diagnosis and prognosis for a variety of clinical diseases by detecting microcirculation changes. It allows the nailfold capillaries to be visualized and it is a useful aid to the differential diagnosis of other undifferentiated connective tissue disease. Researches have shown that changes in the nailfold microcirculation can be one of the main manifestations of many disorders.