Define the skin capillary fragility test, Biology

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Define the Skin Capillary Fragility Test?

One of the earliest signs of ascorbic acid deficiency is the fragility of the capillaries. Capillary fragility is measured by applying negative pressure on a particular area and the number of petechiae haemorrhagic spots) that have appeared in that area counted. It is low in normal persons (40 petechiae) and high in deficient persons (10-20 petechiae).

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