首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
American Scientists Try to Develop Artificial Blood Vessel with the Skin Cell Scientists have grown blood vessels for kidney
American Scientists Try to Develop Artificial Blood Vessel with the Skin Cell Scientists have grown blood vessels for kidney
admin
2013-07-08
38
问题
American Scientists Try to Develop Artificial Blood Vessel with the Skin Cell
Scientists have grown blood vessels for kidney patients from their own cells, making it easier and safer for them to use dialysis machines, a new study says.
Todd McAllister of Cytograft Tissue Engineering in California and colleagues implanted lab-grown blood vessels into 10 patients with advanced kidney disease in Argentina and Poland from 2004 to 2007.
Early results for two of these patients were announced in 2005. In 2007, the scientists published preliminary findings for another 4 patients in the New England Journal of Medicine. In the most recent study, published in the medical journal Lancet, scientists reported on the new blood vessels in those same patients and 4 others.
Dialysis patients need a vessel to connect them to dialysis machines. This can be made from their own vessels ~ But because dialysis is done so regularly, kidney patients often run out of healthy vessels and need an artificial one. Those are prone to infection.
In the study, doctors took a small piece of skin from patients. Ceils from those samples were grown in a lab, to help them produce proteins. From those, scientists made sheets of tissue that were rolled into blood vessels 6 to 8 inches long. The vessels were finished after 6 to 9 months. All of the vessels were implanted into patients’ upper arms, to connect them to dialysis machines.
The vessels failed in three of the patients, which experts said was not surprising in patients so seriously ill. One other patient withdrew from the study and another died of unrelated causes. In the five remaining patients, the vessels worked for at least 6 to 20 months after they were implanted. Afterwards, those patients needed fewer interventions, including surgeries, to maintain the vessels than regular dialysis patients.
The study was paid for by Cytograft Tissue Engineering. McAllister said he and colleagues plan to test similar devices in patients with heart and leg problems.
"It’s difficult to predict what will happen next, but they are on the right track." Vladimir Mironov of the Medical University of South Carolina said. But he worried the vessels, which cost between $ 15,000 and $ 20,000 might be too expensive to be used widely. Dr. Bryan Becker, president of the National Kidney Foundation in the US, said about haft of kidney patients could benefit from these vessels if further tests confirm they work.
The passage is mainly about______.
选项
A、the future of man-made blood vessels
B、the development of man-made organs
C、the contribution of Cytograft Tissue Engineering
D、the study on helping kidney patients
答案
D
解析
主旨大意题。文章第一段就在说“一项最新的研究表明……”,由此可知,这是关于医学最新发展的报道,内容是新型人造血管的研究,如果研究成功,肾病病人是最早的受益者。所以[D]“关于帮助肾病病人的研究”为正确答案。本文的重点不是研究人造血管,研究的最终目的还是要对病人有益,而且也没有讨论人造血管的发展前景,所以排除[A];[B]“人造器官的发展”在文中根本没有涉及,故排除;虽然实验的费用和人员都是Cytograft生物工程公司出的。但本文的主要内容不是介绍这家公司的贡献,排除[C]。
转载请注明原文地址:https://kaotiyun.com/show/EEO4777K
0
考研英语一
相关试题推荐
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Everyonemusthavehadatleastonepersonalexperiencewithacomputererrorbythistime.Bankbalancesaresuddenlyreported
Americansarenowflyingthecrowded,crankyskies.FlightdelaysinJanuaryweretheworstforthatmonthsince1999.Weatheri
Untilthelate1940s,whentelevisionbeganfindingitswayintoAmericanhomes,companiesreliedmainlyonprintandradiotop
Untilthelate1940s,whentelevisionbeganfindingitswayintoAmericanhomes,companiesreliedmainlyonprintandradiotop
Untilthelate1940s,whentelevisionbeganfindingitswayintoAmericanhomes,companiesreliedmainlyonprintandradiotop
随机试题
机体柔嫩,生理调节和适应能力不成熟,平均每天睡眠长达20h;易发生窒息、溶血、感染等,死亡率高是()的特点。
A.头晕胀痛B.手足蠕动C.目涩D.胸闷喜太息E.咽喉肿痛(1996年第79,80题)肝火上炎,可出现()
咽淋巴内环中最大的淋巴组织是
A.恶心呕吐B.发热C.腹痛D.脂肪泻E.黄疸
患者,女,20岁。昨日过食冰水后,出现呃逆,声音沉缓有力,膈间及胃脘不舒,喜热饮,纳食减少,舌苔白润,脉象迟缓。治疗方剂宜用
我国新型工程建设管理体制加强了政府的宏观管理,符合政府职能由微观经济管理转变到( )宏观管理上来的要求。
下列说法正确的有()。
阅读下面的材料,按要求作文。20世纪30年代,梅兰芳先生初到上海,虽然他唱功绝佳,誉满京华,但要想在大上海一下子出名也很难。当时戏班子想在报纸上登广告,但广告怎么写,才能引起人们的注意呢?经过一番筹划,戏班子决定在报纸上只印三个字——梅兰芳。当时上海
使用UTP双绞线和RJ45接头连接的以太网络结构属于()。
某次网球比赛的四强对阵为甲对乙、丙对丁,两场比赛的胜者将争夺冠军.选手之间相互获胜的概率如下:甲获得冠军的概率为().
最新回复
(
0
)