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
52
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.
What does the word "intervention" (Line 9, Para. 6) mean?
选项
A、Treatment after the operation.
B、Device attached to the vessels.
C、Doctor’s instruction of medicine.
D、24-hour careful observation.
答案
A
解析
语义理解题。由题干中的intervention定位到第六段第四句可知,手术后,接受实验的病人不需要太多的人为干预,intervention一词在这里指的是药物、手术等用来维持植入的血管正常工作的手段,最为相近的意思为[A]。“手术后的处理”。[B]“附加物”和[D]“24小时监控”与文章意思不符;[C]“开具药方”与本句后面的“包括手术手段”在逻辑上冲突,故排除。
转载请注明原文地址:https://kaotiyun.com/show/IEO4777K
0
考研英语一
相关试题推荐
TryingtogetAmericanstoeatahealthydietisafrustratingbusiness.Eventhebest-designedpublic-healthcampaignscannots
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Politicalcontroversyaboutthepublic-landpolicyoftheUnitedStatesbeganwiththeAmericaRevolution.(1)_____,evenbefore
Americansarenowflyingthecrowded,crankyskies.FlightdelaysinJanuaryweretheworstforthatmonthsince1999.Weatheri
(46)TelevisionhastransformedpoliticsintheUnitedStatesbychangingthewayinwhichinformationisdistributed,byalterin
Thepilotoftheplaneis______forthepassengers’safety.
随机试题
CO2气体保护焊时,产生的气孔主要是由于保护气层被破坏,使空气入侵而形成氮气
中唐新乐府运动的倡导者是()
唇裂是由于以下哪两种突起不能联合形成的
下列哪项是引起便血的小肠疾病
最常用的超临界流体是()。
背景某安装工程公司经过招投标、评标、决标,与某机场建设部门订立了新建航站楼弱电系统工程项目施工合同,同时某建筑企业承担了航站楼土建工程的建设任务。施工过程中,发生了如下事件:事件一:在施工过程中,为保证工程质量,安装公司改进了部分线缆的接续工艺,人工费
With950millionpeople,IndiarankssecondtoChinaamongthemostpopulouscountries.ButsinceChina【B1】______afamilyplan
在UML中,(46)把活动图中的活动划分为若干组,并将划分的组指定给对象,这些对象必须履行该组所包括的活动,它能够明确地表示哪些活动是由哪些对象完成的。
TheproportionofworkscutforthecinemainBritaindroppedfrom40percentwhenIjoinedtheBBFCin1975tolessthan4per
A、Sydney.B、Paris.C、Tokyo.D、NewYorkCity.C短文提到,新加坡取代去年位于榜首的东京,成为生活成本最高的城市,故选C。
最新回复
(
0
)