Once an abdominal aortic aneurysm reaches a particular size, treatment is recommended to prevent its rupture. An abdominal aneurysm can be treated by open surgery or by minimally invasive endovascular technique. Open surgery requires a large incision in the abdomen and replacement of the dilated portion of the aorta with a synthetic blood vessel. In endovascular repair, an interventional radiologist makes a small incision in the groin, which serves as an entry point for a thin wire catheter that is guided through the femoral artery to the dilated portion of the aorta using advanced medical imaging. Once in place, a stent graft that is compressed into the catheter is opened up and the edges of the stent push against the aortic wall and stays in place. Blood flows through the stent graft instead of the abnormally dilated aorta and prevents it from rupturing.
For this retrospective study, researchers mined the National Inpatient Sample (NIS), the largest national all payer database containing information on around 8 million hospital encounters per year. This database is a part of the larger Healthcare Cost and Utilization Project. The objective was to find all cases of ruptured AAA from 2001 to 2009 that were treated by either endovascular repair or open surgery and to compare their outcomes. They found that 38,858 individuals, with an average age of 74, had ruptured AAA and received one of these two treatments. Endovascular repair was used to treat 6,790 patients; 32,069 individuals had open surgery.
The researchers reported that 39.7 percent of patients who received open surgery died in the hospital, compared to 28.2 percent of patients who received EVAR. The average length of hospital stay for people who had EVAR was about 11 days, but those
|Contact: Ellen Acconcia|
Society of Interventional Radiology