The physician has to be competent to do radial catheterizations since they are more technically challenging. Patients who are obese; have chronic back pain, and/or have a lung disease rendering them with difficulty lying flat will benefit from the radial site. Because the radial artery is closer to the surface of the skin, internal bleeding is minimal while external bleeding is readily apparent and can easily be compressed. The use of the femoral artery site can have severe internal or retroperitoneal bleeding to compromise the patient hemodynamically. After a radial arteriogram, the patient can sit up and eat immediately as opposed to lying supine for 4 to 6 hours with a femoral site. This creates an increase in patient satisfaction.