• search

Stents keep clogged thigh arteries open - US study

By Staff
Subscribe to Oneindia News

BOSTON, May 4 (Reuters) Flexible nickel-titanium tubes may be more effective than standard treatment in helping blood flow through thigh arteries clogged by heart disease, a new study in the New England Journal of Medicine shows.

The mesh tubes, known as nitinol stents, could provide a better treatment option to patients who suffer extreme leg pain from the disease and who are at risk of having a limb amputated.

These stents are designed to bend, twist and even regain their shape after being crushed, unlike conventional stainless steel stents.

A team at the Medical University of Vienna, led by Martin Schillinger, found that patients with the nitinol stents could walk further on a treadmill and had less of a chance of having the tubes clog up again.

In the first year after implanting the mesh tube, researchers found that only 37 percent of the 51 volunteers suffered new blockage.

At the same time, 63 percent of the 53 volunteers who had their arteries reopened with a procedure called angioplasty, where a balloon is inserted, suffered more clogging.

Physicians generally recommend using angioplasty first, but it usually does not lead to a long-term improvement.

Doctors can also perform bypass surgery, which is complicated, or use stainless steel stents to repair the problem. But the stainless steel stents often break because the leg muscles surrounding the artery move so much.

The risk of breakage of the nitinol stents was just 2 percent in the first year, the study found.

The study used two brands of nitinol stents made by Guidant, which was recently acquired by Boston Scientific.

Four of the 10 investigators have ties to Boston Scientific.

In an editorial in the Journal, Alan Hirsch of the University of Minnesota said the Schillinger study is not definitive because it only followed patients for a year and did not include people who were treated without surgery. Patients sometimes get better on their own.

''The relative risk and benefit, durability, and cost of each potential therapy and the patient subgroups that are mostly likely to benefit from each therapy have not been defined,'' he said.

Reuters KD GC0906

For Breaking News from Oneindia
Get instant news updates throughout the day.

X
We use cookies to ensure that we give you the best experience on our website. This includes cookies from third party social media websites and ad networks. Such third party cookies may track your use on Oneindia sites for better rendering. Our partners use cookies to ensure we show you advertising that is relevant to you. If you continue without changing your settings, we'll assume that you are happy to receive all cookies on Oneindia website. However, you can change your cookie settings at any time. Learn more