When symptoms suggest this problem, often patients will have an ultrasound or CT scan. The best test for confirming the diagnosis is a pelvic venogram. This is a procedure done as an outpatient in one of our partner hospitals. A mild sedative is given. A small catheter is placed into the vein in the right groin. X-rays are used to guide the catheter into the veins that drain the pelvis and x-ray dye is then given, creating an image of the veins. When the procedure is over, the catheter is removed. Usually patients have to recover for about an hour after the procedure before they can go home. Patients can resume all their normal activities the next day.