Navigation Links
Contrast-enhanced ultrasound monitors aortic aneurysm treatment
Date:5/14/2012

OAK BROOK, Ill. Contrast-enhanced ultrasound is an effective, noninvasive method for monitoring patients who undergo endovascular repair for abdominal aortic aneurysms, according to a new study published in the journal Radiology.

"Our findings support the addition of contrast-enhanced ultrasound as a complementary tool in the follow-up of these patients," said Rosa Gilabert, M.D., Ph.D., from the Hospital Clinic at the University of Barcelona in Spain.

An abdominal aortic aneurysm occurs when the large blood vessel that supplies blood to the abdomen, pelvis and legs becomes abnormally large or balloons outward. Abdominal aortic aneurysms can occur in anyone, but are most commonly found in men over the age of 60 with one or more risk factors, such as smoking, high blood pressure, a positive family history, high cholesterol, peripheral vascular disease or obesity. The aneurysm places stress on the wall of the aorta that can lead to wall rupture. Mortality rates after rupture are high.

Endovascular repair of abdominal aortic aneurysms (EVAR) involves placement of a stent graft called an endograft into the vessel to bypass the area of the aorta weakened by the aneurysm and keep it from rupturing. EVAR has substantially reduced mortality around the time of surgery when compared with open repair. However, EVAR effectiveness can be compromised by a complication, known as an endoleak, which carries the subsequent risk of rupture of the aneurysm sac.

Routine surveillance of endovascular stent placement with computed tomography (CT) angiography enables detection of potential complications in patients with endografts, but it also exposes the patient to ionizing radiation and potential kidney damage from the CT contrast agent.

Dr. Gilabert and colleagues studied ultrasound with a second-generation contrast agent and contrast-specific software as an alternative to CT angiography. The newer contrast agent consists of a suspension of microbubbles similar in size to red blood cells. Because of their small size, the microbubbles do not pass through the cells lining the inner surface of the blood vessel walls and thus provide a pure intravascular contrast agent that allows a real time investigation over several minutes, with the visualization of the dynamic enhancement pattern in real time.

"The main advantage of contrast-enhanced ultrasound is that it offers the possibility of real-time exploration of EVAR-treated patients, without the exposure to ionizing radiation or the risk of damage to the kidneys," she said. 'To avoid the potential risk of kidney toxicity is particularly important, because impaired renal function is not uncommon in these patients."

The researchers evaluated the technique in 35 patients who underwent EVAR. The patients had CT angiography and contrast-enhanced ultrasound studies performed at one- and six-month follow-up and yearly thereafter.

A total of 126 CT angiography and contrast-enhanced ultrasound studies were performed. Contrast-enhanced ultrasound had a sensitivity of 97 percent, a specificity of 100 percent and an accuracy of 99 percent for endoleak detection. The technique enabled correct classification of 26 of 33 endoleaks and did not miss any clinically important endoleak.

"These results support that contrast-enhanced ultrasound can be integrated in the EVAR follow-up," Dr. Gilabert said.


'/>"/>
Contact: Linda Brooks
lbrooks@rsna.org
630-590-7762
Radiological Society of North America
Source:Eurekalert

Related medicine news :

1. Contrast-enhanced MRI could play a key role in differentiating between common types of arthritis
2. Clinical trial underway: Miniature ultrasound device could revolutionize pain relief
3. Sonitor Technologies Announces New Staff Tag and Battery Powered Ultrasound Receiver
4. Groundbreaking Study Using Ultrasound for the Treatment of Intracerebral and Intraventricular Hemorrhage Stroke Shows Promise
5. Office-based ultrasound-guided FNA superior in diagnosing head and neck lesions
6. Why do physicians order costly CTs? Ultrasound yields better diagnosis, safer, less costly
7. Medical Ultrasound Now Used in New, Non-surgical Cosmetic Procedure
8. Unprecedented AIUM training guidelines speak to future of musculoskeletal ultrasound
9. Johns Hopkins Health System Acquires Imorgon Ultrasound PACS Product
10. Doctors use ultrasound to diagnose possible muscular trauma in professional athletes on-site
11. MedCorp LLC Unveils New Marketing Campaign Including Refreshed Logo and All-New Website Focused on Ultrasound
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/30/2016)... ... April 30, 2016 , ... ... inMotion3D Abstract users can distort and manipulate three-dimensional shapes with ease all within ... rows, ranks, point, lines, polygons, polygon texture animation, opacity texture animation, overall shape ...
(Date:4/30/2016)... ... April 30, 2016 , ... Saturday, April 30, marks World ... on public health. The World Veterinary Association (WVA) and the World Organization for ... continuing education with a One Health focus, which emphasizes how veterinarians pursue continuing ...
(Date:4/30/2016)... , ... April 30, 2016 , ... “Aging well is a challenge for all of us, but there are things ... Parul T. Kohli . “Research is showing more and more that there are simple, yet ... and disability as we age.” Top priorities Dr. Kohli’s recommends for her patients include;, ...
(Date:4/29/2016)... ... April 30, 2016 , ... Mercy College is expanding ... The following programs will be expanding due to high demand: Master of Business Administration ... will begin this summer. , School of Business Graduate Program Chair Dr. ...
(Date:4/29/2016)... Fl (PRWEB) , ... April 29, 2016 , ... ... recently notified by the Accreditation Council for Graduate Medical Education (ACGME) that it ... , This is the first accreditation of three residency programs that Memorial is ...
Breaking Medicine News(10 mins):
(Date:4/29/2016)... April 29, 2016 Glycotope GmbH, ... today announces the appointment of Dr. Alfredo Zurlo ... is an oncologist with many years clinical experience and ... industries. His last role was at Mologen AG where ... Executive Board. Previously Dr. Zurlo held various positions at ...
(Date:4/28/2016)... , April 28, 2016   Click ... Diplomat Pharmacy, Inc. (NYSE: DPLO), the nation,s largest ... signed a definitive agreement to acquire Valley Campus ... Pharmacy ("TNH"), a leading specialty pharmacy that provides ... Nuys, California . In 2015, TNH generated ...
(Date:4/28/2016)... 2016 Research and Markets has ... Products Market 2016-2020" report to their offering. ... The global plastic surgery products market is expected ... period 2016-2020. , ,The growing adoption of laser in ... of the market. Lasers are used to treat a ...
Breaking Medicine Technology: