Abstract
Capillaroscopy is performed to evaluate the morphology, frequency and blood flow of nailfold capillaries as well as relevant extracapillary changes in rheumatic conditions. The main indication is the differentiation between primary and secondary Raynaud's phenomenon. Various rheumatic conditions show different and partially typical pathognomonic alterations of the microcirculation or capillary patterns. This simple, noninvasive, inexpensive and effective technique is well suited for early diagnosis, especially of connective tissue diseases. The specific significance is highest for systemic sclerosis which is the most frequently evaluated entity. The corresponding microscopic alterations allow stage-adapted conclusions concerning the acuity of inflammation to be formed. That is not the only reason why capillaroscopy represents an important tool in follow-up controls and together with other techniques, such as flow measurement by laser Doppler, further conclusions can be drawn.
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