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  • Video systems designed to display images of the blood capillaries taken from a microscope placed on the skin. These images are shown on a video monitor or personal computer display. The systems typically consist of a handheld device that is connected to a personal computer; the handheld device includes at the tip interchangeable microscope magnifying lenses (usually from 20X to 200X magnification), a video camera, and controls for image capture, illumination, and focus. The system usually includes a software with algorithms that allow measurement, recording, and assessment of capillary characteristics, as well as permitmapping the examined positions and fingers (known as nail fold capillaroscopy). Capillaroscopy video systems are mainly used to analyze microvascular abnormalities, frequently present in patients with autoimmune rheumatoid diseases, especially for differentiation of primary and secondary Raynaud\'s phenomenon.
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