外语教育网
您的位置:外语教育网 > 英语影音 > 双语快讯 正文
  • 站内搜索:

电子鼻助诊病

2006-02-21 00:00程瑶,CRI

Scientists are developing a super-sensitive Breathalyzer-type tool that works a lot like a nose and could one day sniff out human ills.

Rather than detecting blood-alcohol levels—or garlic and onions—the device would identify diseases by sensing chemical patterns carried in the breath. Researchers have linked some of these patterns, known as biomarkers, to diseases as diverse as diabetes, AIDS, and schizophrenia.

Previous disease-smelling systems have been big and difficult to use and had limited capability.

"We're making a small, inexpensive, and robust device to assess the same things, anywhere. It could work in the field, at the mall, in the parking lot, and at home," said Frank Bright, a chemist from the University at Buffalo.

How it works

While it's not clear whether the devices would be needed in parking lots, the technology is remarkable.

The electronic olfactory system, which looks nothing like a nose, will be made up of sensors similar to receptors in our nasal passages. These sensors will be triggered by molecules floating in the air. When a patient breathes into the device, different molecules will trigger a different set of sensors to light up. Bright and his research team can train the device, which is made of artificial neurons mimicking a brain, to connect the pattern of lights with particular diseases.

Scientists will start the training by comparing samples of patients already diagnosed with cancer. They'll search for similar patterns in the patients' breath, so that in the future, when the device sees those patterns, it recognizes cancer.

The training will also involve teaching the machine to ignore everyday smells like Listerine, cheeseburgers and breath mints.

More sensitive

Other disease sniffers have had only about 30 sensors. So far, Bright's team has engineered about a 100 different sensors, which match up to all kinds of molecules. Their goal is to produce a million.

"The ability to create a library with more than a million different sensors is pretty remarkable," Bright told LiveScience.

He said prototypes should be available about a year from now.

The device's portability, speed and cheap price tag should help doctors diagnose diseases early. It could particularly improve the health of the elderly and impoverished, people who often don't have access to routine health care, Bright said. As well, doctors could use it to filter out possible diagnoses and cut down on costly medical tests.

"We're really thinking about early intervention," said Bright.



美国的一个科研小组目前正在开发一种类似呼气测醉器的工具,这种超级灵敏的仪器就像一个“电子鼻子”,它可以在不久的将来替人体查找病因。

据美国“生活科学”网站2月18日报道,“电子鼻子”并不是用来检测血液酒精浓度,或是检查你吃了多少洋葱和大蒜的,这种仪器将通过病人呼出的气体中所带有的特定化学模式来查找病因。研究人员将这些模式(即用于说明疾病或健康状况的生物标志)同多种疾病联系在一起,如糖尿病、艾滋病和精神分裂症等。

真鼻子请教假鼻子:闻闻我得了啥病

这个电子嗅觉系统中有很多传感器,是模仿人类鼻子内及呼吸道其他部位的接受器而制成的。这些传感器因漂浮于空气中的各种分子而受到刺激。当病人对着仪器呼吸时,不同的分子会激发不同的传感器组合指示灯亮起来。

布莱特和他的科研小组还可以训练这种仪器,让它在碰到某些疾病时亮起相应的组合指示灯。他们将利用已确诊患有癌症的病人来训练这种仪器,尽可能的搜索癌症病患的呼吸模式,以便今后再遇到这种病患时能很快诊断出病因。当然,训练的过程还包括教机器识别并忽略一些日常气味,如李斯特防腐液、干酪肉饼以及薄荷糖的气味。

电子嗅觉的图书馆:拥有百万传感器

负责查询其他疾病的传感器只有30个左右。到目前为止,布莱特的研究小组总共已设计了约100个不同传感器,他们的目标是做出100万个。布莱特说,用超过100万个不同的传感器来创造一个图书馆的做法是非常令人振奋的,他预计这种仪器的样机将于一年内研制成功。

布莱特介绍说,“电子鼻子”的灵活性、速度和经济实惠将帮助医生更快锁定病因。它还能改善人们,特别是老年人和贫困人口的健康状况,因为这部分人一般不可能定期去做体检,而利用这种仪器滤出病因还可以省去昂贵的检查费用。

相关热词:bilingual news science doctor
考试英语系列辅导课程
周 涵著名职称英语辅导专家,十余年职称英语教学实践……详情>>
周涵:职称英语辅导名师
赵文通资深学位英语辅导专家,深谙命题方向及重点、难点……详情>>
赵文通:学位英语考试辅导名师
冉继军北京大学博士,知名高校教师,雅思权威辅导专家……详情>>
冉继军:雅思考试辅导名师

  1、凡本网注明 “来源:外语教育网”的所有作品,版权均属外语教育网所有,未经本网授权不得转载、链接、转贴或以其他方式使用;已经本网授权的,应在授权范围内使用,且必须注明“来源:外语教育网”。违反上述声明者,本网将追究其法律责任。
  2、本网部分资料为网上搜集转载,均尽力标明作者和出处。对于本网刊载作品涉及版权等问题的,请作者与本网站联系,本网站核实确认后会尽快予以处理。本网转载之作品,并不意味着认同该作品的观点或真实性。如其他媒体、网站或个人转载使用,请与著作权人联系,并自负法律责任。
  3、联系方式
  编辑信箱:for68@cdeledu.com
  电话:010-82319999-2371