ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Stent in aortic aneurysm. An aneurysm occurs when an artery wall weakens and swells like a balloon. If it bursts, an aneurysm can cause severe internal haemorrhage. Stents are mesh tubes inserted into the artery to strengthen and hold open the affected area to prevent rupture.
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