Pressure Index (Pi)

Pressure Index (Pi) is the ratio of blood pressure in the tibial artery to the pressure in the brachial artery, which reflects the degree of narrowing of the arteries of a given limb.

This indicator is used to diagnose and monitor peripheral arterial diseases such as atherosclerosis and diabetic angiopathy.

Pi is calculated by dividing ankle systolic pressure by brachial systolic pressure. Normal values ​​are 0.9-1.3. Values ​​less than 0.9 indicate pathological narrowing of the arteries of the lower extremities.

The lower the pressure index, the more pronounced the degree of stenosis of peripheral vessels. Pi allows you to non-invasively and quickly assess arterial patency and the effectiveness of treatment in patients with occlusive vascular diseases.

Pressure Index (PI) is the ratio of blood pressure in the tibial and brachial arteries. This indicator allows you to assess the degree of vasoconstriction in the extremities.

The pressure index is used in medicine to diagnose arterial hypertension and other diseases associated with circulatory disorders. It may also be useful for assessing vascular health in people who are overweight or smoke.

To determine the pressure index, it is necessary to measure blood pressure in the brachial and tibial arteries using a special device - a tonometer. Then the obtained values ​​are compared with each other. If the pressure index is higher than normal, this may indicate problems with the blood vessels.

It is important to note that the pressure index is not the only indicator of vascular condition and should be used in conjunction with other diagnostic methods.