What Is Raynaud's Phenomenon?
4. What Tests Are Used?
A specialized diagnostic procedure, known as a cold stimulation test, is used to expose patients to the most likely conditions to generate a Raynaud’s response. A small temperature sensor is attached to the fingers. Then the hands are placed in ice water to produce a response. When removed, the time it takes for the hands to return to their original temperature is measured. This can indicate a deficiency and, most likely, Raynaud’s syndrome.
Many doctors will also examine the blood vessels within fingernails under a microscope to gauge their health. Because Raynaud’s is often associated with other medical conditions, doctors may also perform other diagnostic tests. Blood tests can help determine if the condition is a primary or secondary one.
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