Interventional radiology perform minimal invasive procedures, usually percutaneously (through the skin outside the body). Uses different techniques and instruments (catheters, balloon dilatation, stent or stents, ...). The procedures performed are often endoluminal via blood vessels, digestive-biliary ducts, or organs like kidneys and liver, to solve problems such as blockages (stenosis), dilation (angioplasty), drainage of anatomical collections, among others. It is performed in hospital wards equipped with a radiographic imaging system (digital arch) and monitors for viewing radiological images (RX and TC). It also sometimes makes use of other techniques such as MRI or ultrasound. The procedure does a radiologist experienced in these techniques, aided by specialist nurses. In particularly complex procedures or when the patient's condition is bad it is essential to involve other physicians such as anesthesiologists and vascular surgeons.