呼吸检测法可检测肠癌
文章来源:未知 文章作者:enread 发布时间:2012-12-05 08:20 字体: [ ]  进入论坛
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Scientists say they have developed a breath-test that can accurately1 tell if a person has bowel2 cancer.

科学家发明了一种呼吸检测法,能精确地检测出一个人是否患肠癌。
 
The test, which looks for exhaled3 chemicals linked to tumour4 activity, was able to identify a majority of patients with the disease.
 
The British Journal of Surgery reported an overall accuracy of 76%.
 
However, another scientist said it was unlikely a fully5 functioning and reliable breath-test would be available soon for the general public.
 
Scientists are working on breath-tests for a host of other diseases, including several types of cancer, TB and diabetes6.
 
If diagnosed and treated early, the chances of stopping cancer can be good, but there is often little or no outward sign of the disease until it has progressed significantly.

Chemical 'smell'
 
The current screening test for bowel cancer looks for signs of blood in the faeces, but only a small proportion of those who test positive actually have colorectal cancer, which means unnecessary and invasive further testing for many people.
 
The breath-test technology relies on the idea that the biology of tumours7 can lead to the production of specific "volatile8 organic compounds", combinations of chemicals unlikely in a healthy person.
 
These can be found in small amounts in the breath of the patient, and early studies found dogs could be trained to identify them - although the latest study relies an electronic device to analyse breath gases.
 
The team from a hospital in Bari, southern Italy, compared the breath of 37 patients known to have bowel cancer with that of 41 "controls" who were thought to be healthy.
 
The initial test identified the cancer patients with 85% accuracy, and although, when combined with a follow-up test, the overall result fell to 76%, the researchers were upbeat about its potential.
 
"The present findings further support the value of breath-testing as a screening tool," they say.
 
It might be possible that the technique could help identify patients whose cancer was returning after treatment.
 
Bigger studies with a greater number of patients were now needed to fine-tune the test and confirm it worked, said Dr Donato Altomare and colleagues.
 
Breath-tests have been suggested for a variety of diseases, including other types of cancer, TB and diabetes, but Dr Claire Turner, a lecturer in analytical9 chemistry at the Open University, said that it was often difficult to interpret the cocktail10 of chemicals contained in every breath, as they could be influenced by what the patient had been eating, or even just by being ill or spending time in a hospital environment.
 
She said: "These technologies show a great deal of promise, and hopefully we will see larger studies in the future. 
 
"However, we are unlikely to see this kind of breath testing available widely in the short term."


点击收听单词发音收听单词发音  

1 accurately oJHyf     
adv.准确地,精确地
参考例句:
  • It is hard to hit the ball accurately.准确地击中球很难。
  • Now scientists can forecast the weather accurately.现在科学家们能准确地预报天气。
2 bowel Bszzy     
n.肠(尤指人肠);内部,深处
参考例句:
  • Irritable bowel syndrome seems to affect more women than men.女性比男性更易患肠易激综合征。
  • Have you had a bowel movement today?你今天有排便吗?
3 exhaled 8e9b6351819daaa316dd7ab045d3176d     
v.呼出,发散出( exhale的过去式和过去分词 );吐出(肺中的空气、烟等),呼气
参考例句:
  • He sat back and exhaled deeply. 他仰坐着深深地呼气。
  • He stamped his feet and exhaled a long, white breath. 跺了跺脚,他吐了口长气,很长很白。 来自汉英文学 - 骆驼祥子
4 tumour tumour     
n.(tumor)(肿)瘤,肿块
参考例句:
  • The surgeons operated on her for a tumour.外科医生为她施行了肿瘤切除手术。
  • The tumour constricts the nerves.肿瘤压迫神经。
5 fully Gfuzd     
adv.完全地,全部地,彻底地;充分地
参考例句:
  • The doctor asked me to breathe in,then to breathe out fully.医生让我先吸气,然后全部呼出。
  • They soon became fully integrated into the local community.他们很快就完全融入了当地人的圈子。
6 diabetes uPnzu     
n.糖尿病
参考例句:
  • In case of diabetes, physicians advise against the use of sugar.对于糖尿病患者,医生告诫他们不要吃糖。
  • Diabetes is caused by a fault in the insulin production of the body.糖尿病是由体內胰岛素分泌失调引起的。
7 tumours 6654305f758b5b5576a74cb007e8d079     
肿瘤( tumour的名词复数 )
参考例句:
  • Blood vessels develop abnormally in cancer tumours. 在癌肿瘤中血管出现不正常。
  • This apparatus scans patients' brains for tumours. 这台仪器扫描检查病人的脑瘤。
8 volatile tLQzQ     
adj.反复无常的,挥发性的,稍纵即逝的,脾气火爆的;n.挥发性物质
参考例句:
  • With the markets being so volatile,investments are at great risk.由于市场那么变化不定,投资冒着很大的风险。
  • His character was weak and volatile.他这个人意志薄弱,喜怒无常。
9 analytical lLMyS     
adj.分析的;用分析法的
参考例句:
  • I have an analytical approach to every survey.对每项调查我都采用分析方法。
  • As a result,analytical data obtained by analysts were often in disagreement.结果各个分析家所得的分析数据常常不一致。
10 cocktail Jw8zNt     
n.鸡尾酒;餐前开胃小吃;混合物
参考例句:
  • We invited some foreign friends for a cocktail party.我们邀请了一些外国朋友参加鸡尾酒会。
  • At a cocktail party in Hollywood,I was introduced to Charlie Chaplin.在好莱坞的一次鸡尾酒会上,人家把我介绍给查理·卓别林。
TAG标签: cancer patients breath
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