Special Procedures - Venogram
What is a Venogram?
Venograms are usually used to evaluate lower extremity thrombosis or blood clots when an ultrasound procedure is not definitive. Extremity venogram can identify the cause of swelling and gauge vein status after surgery or an interventional procedure. Venogram procedures involve placing a tube or catheter into the patient’s vein, injecting contrast and then using fluoroscopic x-ray imaging to study. And they can be used to guide treatment (venous thrombolysis or venous angioplasty / stent (renal dialysis access).
What happens in a venogram procedure?
During a venogram procedure, the catheter insertion site is cleaned and shaved in preparation for the injection of a local anesthetic. The anesthetic injection will sting when given, but the procedure area will become deadened. Patients should only feel a slight pressure as the catheter is inserted through a small incision and no should feel no pain. Tell your technologist if you do feel pain.
Then, a contrast agent is introduced through the catheter to make the vein visible on x-rays. When the contrast is introduced the patient may feel a warm sensation for a few seconds. Several contrast injections and x-rays are needed during the exam. The catheter is then removed and pressure is applied to the site to stop any bleeding.
Procedures that involve a femoral incision (groin) will require a short stay of 2 to 3 hours in a recovery room. During this time the leg is held immobilized.