An elderly patient has reduced mobility in his lower extremities. It has been observed that there are dark areas under the skin where blood has pooled. This pooling is most likely caused by

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The pooling of blood under the skin is likely due to a reduction in blood flow through the veins. Reduced mobility can lead to reduced muscle contractions which are important in helping to pump blood from the legs back up to the heart. As a result, blood can accumulate in the veins and cause dark areas under the skin known as venous stasis or pooling.

An Elderly Patient Has Reduced Mobility in His Lower Extremities