UK scientists say they have found a way of diagnosing different types of bowel1 disease by testing the smells given off by patients' stools.
The test analyses the chemical netpounds emitted and recognises the profile of different diseases. In a study of 182 stool samples from patients with inflammatory bowel disease and irritable2(过敏的) bowel syndrome3, the results were 76% accurate. The research team said the test could provide more accurate diagnoses. The University of the West of England study, published in the Journal of Breath Research, used a testing system they built netbining a gas chromatograph and a metal oxide4 sensor5 to recognise patterns specific to known diseases. These patterns are created by volatile6 organic netpounds emitted from stool samples, which are a good indicator7 of the conditions in the patient's gastrointestinal tract8. Difficult to diagnose Norman Ratcliffe, professor of material and sensor sciences at UWE, said the "odour reader" would get even more accurate results with more samples to test. "There is a huge amount of variation in samples because of the different foods eaten by patients, but we have trained the system to match unknown samples to the database of patterns it has already acquired. With more samples, we would get better results." The method could be particularly useful for diagnosing for a group of diseases that are hard to distinguish, he said. Irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD), for example, have very similar symptoms, making a definitive9 diagnosis10 difficult - and yet they are very different conditions. IBD is an autoimmune disease caused by a response of the immune system to microbes in the gut11, which is usually diagnosed by colonoscopy(结肠镜检查), while IBS is a disorder12 of the digestive tract with no known cause. It is often only diagnosed when other more serious bowel diseases have been ruled out. The study results also showed that patients with IBD could be distinguished13 from healthy patients with a 79% accuracy. Gary Douch, chairman of Bowel Disease UK, said the process offered hope to those suffering from a range of bowel diseases. "If this process is as accurate as 76% it will offer hope to those potentially suffering from IBD. "If patients can be correctly diagnosed early without the invasive investigations14, it will save the NHS money and also speed up much-needed treatment for the patient."
1 bowel 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?
2 irritable adj.急躁的;过敏的;易怒的 参考例句:
He gets irritable when he's got toothache.他牙一疼就很容易发脾气。
Our teacher is an irritable old lady.She gets angry easily.我们的老师是位脾气急躁的老太太。她很容易生气。
3 syndrome n.综合病症;并存特性 参考例句:
The Institute says that an unidentified virus is to blame for the syndrome. 该研究所表示,引起这种综合症的是一种尚未确认的病毒。
Results indicated that 11 fetuses had Down syndrome. 结果表明有11个胎儿患有唐氏综合征。
4 oxide n.氧化物 参考例句:
Oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
How can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
5 sensor n.传感器,探测设备,感觉器(官) 参考例句:
The temperature sensor is enclosed in a protective well.温度传感器密封在保护套管中。
He plugged the sensor into a outlet.他把传感器插进电源插座。
6 volatile 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。
7 indicator n.指标;指示物,指示者;指示器 参考例句:
Gold prices are often seen as an indicator of inflation.黄金价格常常被看作是通货膨胀的指标。
His left-hand indicator is flashing.他左手边的转向灯正在闪亮。
8 tract n.传单,小册子,大片(土地或森林) 参考例句:
He owns a large tract of forest.他拥有一大片森林。
He wrote a tract on this subject.他曾对此写了一篇短文。
9 definitive adj.确切的,权威性的;最后的,决定性的 参考例句: