A good way od checking the effectiveness of a roller bandage on the lower leg is to check the nail for capillary refill. After the bandage is in place a slight squeeze of the big toenail will tell you if it's too tight. If the nail goes pale and then back to pink it's OK and the blood flow isn't contricted. Of course if it's a woman and she is wearing toe nail polish then you're in trouble!
Lateral is one, can't recall the other. The bandage thing would be by checking for blood flow by squeezing toenail and checking the colour returns under the nail.
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