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  3. Cardiologists have pioneered the world’s first non-surgical bypass operation to turn a vein into an artery using a new technique

Cardiologists have pioneered the world’s first non-surgical bypass operation to turn a vein into an artery using a new technique

admin2018-03-26  3
问题    Cardiologists have pioneered the world’s first non-surgical bypass operation to turn a vein into an artery using a new technique to divert blood flow in a man with severe heart disease. The keyhole procedure, which avoids the extensive invasive surgery of a conventional bypass, will offer hope to ten of thousands of people at risk from heart attacks.
   Coronary heart disease, where the arteries are progressively silted up with fatty deposits, is responsible in a major industrial country like Britain for more than 160, 000 deaths each year. Although major heart surgery is becoming commonplace, with more than 28, 000 bypass operations in the UK annually, it is traumatic for patients and involves a long recovery period.
   The new technique was carried out by an international team of doctors who performed the non-invasive surgery on a 53-year-old German patient. According to a special report in Circulation, journal of the American Heart Association, cardiologists developed a special catheter which was inserted into one of his leg arteries, threaded up through the aorta to the top of the diseased artery, which was the only part still open and receiving blood. Then, guided by ultrasound, a physician pushed a needle from inside the catheter through the artery wall and into the adjacent vein. A thin, flexible wire was threaded through the needle and the needle and catheter were withdrawn, leaving the wire behind and a small angioplasty balloon, which was used to widen the cannel. Finally, the vein was blocked of just above the new channel allowing blood from the artery to be re-routed down the vein.
   After the procedure, the vein effectively became an artery, carrying blood in the reverse direction from the previous way, and feeding the starved heart tissue with oxygen.
   Dr. Stephen Oesterle, who led the team, said: "This milestone marks the first coronary artery bypass performed with a catheter. The technology offers a realistic hope for truly minimally invasive bypass procedures in the future. One of the most invasive things you can do in medicine is coronary artery bypass surgery. Our ultimate goal is to replace traditional coronary artery bypass with a procedure that does not require surgery. " Dr. Oesterle is director of cardiology at Massachusetts General Hospital and associated professor of medicine at Harvard Medical School in Boston, Melanie Raddon, cardia nurse at the British Heart Foundation, said it was likely to be many years before the procedure was routinely used in hospitals.
The purpose of writing this text is probably to______.
选项 A、praise the high technological level of Harvard Medical School
B、comfort those patients who have developed Coronary heart disease
C、introduce a new therapy to cure heart disease
D、criticize the traditional bypass surgery
答案C
解析 主旨题。文章第一、二段介绍了新搭桥技术的优越性，第三、四段具体说明了新疗法的过程及疗效，第五段引用别人的话评价了该技术。这说明本文在介绍一种治疗心脏病的新方法。
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