Angiography is a radiological examination that allows the examination of blood vessels through the intravenous injection of a contrast medium; a substance that appears opaque in radiography. It is delivered to the organ to be studied through a catheter. The purpose of the examination is to study the course of blood vessels and identify any alterations such as restrictions or occlusions. (for example in the coronary arteries of the heart with coronary angiography or in the limbs with peripheral angiography). Automatic CO2 injection of the contrast medium enables interventional diagnostics for peripheral angiography.