官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
公众微信服务号
英语全能特训(微信公众服务号)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

HEALTH REPORT - Unapproved Uses of Drug-Treated Heart Stents Questioned

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
MP3节目录音 MP3节目录音  PDF节目文稿 PDF节目文稿 
文章正文
同步字幕

This is the VOA Special English Health Report.

A coronary stent is a small tube that is used to treat heart patients. The tube is made of

A stent is a tube of wire mesh
A stent is a tube of wire mesh

wire mesh. Doctors place it inside an artery that has narrowed. They expand the stent to hold the walls of the artery open so blood can flow normally to the heart. If an artery is blocked, people can suffer chest pain and heart attacks.

In most cases, a stent is left permanently in place to keep the artery open after a treatment called angioplasty.

Increasingly doctors use what is called a drug-eluting stent. This kind has medicine on it that is released slowly over time. The drug is designed to prevent the creation of scar tissue in the artery. Scar tissue can cause the artery to narrow again.

Millions of people now have drug-eluting stents. The United States Food and Drug Administration approved the first one in two thousand three. The devices are approved for use in patients with simple blockages and no history of a heart attack.

But once the F.D.A. approves a drug or other treatment, doctors do not have to follow only the approved uses. They may try other uses, including untested uses, if they think it could help their patients. This is called "off-label" use.

But recently some studies have questioned the safety of off-label use of drug-treated stents.

In early May, the Journal of the American Medical Association published two studies. These were based on the records of several thousand patients.

A stent maker, Cordis, helped pay for one of the studies. The study found that at one year, the patients with the least risk were those who met the conditions for approved or "on-label" use.

For example, restenosis, which is when the artery narrows again, was reported in four percent of those patients. Patients with more serious artery problems had rates of seven to eight percent. Still, the researchers say the number of patients affected was small.

Compared to the first study, the second study found a higher risk of problems with off-label use of drug-eluting stents. Millenium Pharmaceuticals and Schering-Plough helped pay for the second study. These companies make drugs that can be used in place of the stents.

Now, additional research is examining how outcomes could be affected by the methods that doctors use when they put a stent into a patient. We will discuss this part of the issue next week.

And that's the VOA Special English Health Report, written by Caty Weaver. I'm Katherine Cole.

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏公网安备 32010202011039号苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台