 Diagnostic evaluation for peripheral artery disease includes the ankle brachial index as well as blood pressure measurements in the lower extremities at different parts. So it starts as a blood pressure measurement in the thigh right above the knee, right below the knee, and right above the ankle. And if there is a drop in the systolic blood pressure by more than 30 millimeters of mercury, then that is typically a suggestion that there might be some peripheral artery disease. Now the ankle brachial index is another measure that we can see. And what that is is the ankle systolic blood pressure divided by the brachial systolic blood pressure. And that might be left or right, whichever one is greater. And that index, that ratio then, is transferred into a table that will tell us the degree of the peripheral artery disease and then suggest treatment options from there.