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  3. There is nothing more possible than a new hip or knee that can put the spring back in your step. Patients receiving joint implan

There is nothing more possible than a new hip or knee that can put the spring back in your step. Patients receiving joint implan

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问题     There is nothing more possible than a new hip or knee that can put the spring back in your step. Patients receiving joint implants (移植) often are able to resume many of the physical activities they love, even those as vigorous as tennis and hiking. No wonder, then, that joint replacement is growing in popularity.
    In the United States in 2007, surgeons performed about 806,000 hip and knee implants (the joints most commonly replaced), double the number of performed a decade earlier. Though these procedures have become routine, they are not failure free.
    "Implants must sometimes be replaced," said Dr. Henrik Malchau, an orthopedic surgeon (矫正 外科医生) at Massachusetts General Hospital in Boston. A study published in 2007 found that 7 percent of hips implanted in Medicare patients had to be replaced within seven and a half years.
"The percentage may sound low, but the finding suggests that thousands of hip patients eventually require a second operation," said Dr. Malchau. Those patients must endure additional recoveries, often painful, and increased medical expenses.
    The failure rate should be lower, many experts agree. Sweden, for instance, has a failure rate estimated to be a third of that in the United States. Sweden also has a national joint replacement registry, a database of information from which surgeons can learn how and why certain procedures go wrong. A registry also helps surgeons learn quickly whether a specific type of implant is particularly problematic. "Even country that has developed a registry has been able to reduce failure rates significantly," said Dr. Daniel Berry, chief of orthopedic surgery at the Mayo Clinic in Rochester, Minn.
    A newly formed American Joint Replacement Registry will begin gathering data from hospitals in the next 12 to 18 months. It’s good news for those who are considering replacing a knee or hip.
The U.S. is trying to reduce joint replacement failure rate by______.
选项 A、strictly controlling the number of replacement operations
B、asking hospitals to follow up each case for 12-18 months
C、setting up a national joint replacement database
D、sending doctors to be trained in Sweden
答案C
解析 第五、六段。第五段的后半截说，凡是建立了数据库的国家都会降低手术的失败率。第六段说，美国新近成立了一个“关节更替资料室”。选项C是正确的。选项A和D文中没有提及。选项B，在12～18个月内跟踪每一例手术的目的是建立数据库，并不能直接降低失败率。因此，选项B是错的。
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