Donnerstag, Juni 30, 2011

Acupuncture - Evidence - NHS Choices


Acupuncture - Evidence 

Evidence for its effectiveness 

There is some scientific evidence that acupuncture is effective for a small number of health conditions. However, for the majority of conditions for which acupuncture is used, the scientific evidence is inconclusive or there has been no attempt to collect good-quality evidence. For a small number of conditions, there is evidence that acupuncture does not work.

More research is needed into the effectiveness of acupuncture on a wide range of conditions.

It is important to remember that when we use a treatment and feel better, this can be because of a phenomenon called the placebo effect and not because of the treatment itself.

When scientists gather evidence on the effectiveness of a treatment, they take the placebo effect into account. For more information, watch a video about the placebo effect.

Positive evidence

There is reasonably good evidence that acupuncture is an effective treatment for:

  • chronic back pain
  • dental pain
  • pain and discomfort during gastrointestinal endoscopy
  • headache
  • nausea and vomiting after an operation
  • pain and discomfort during oocyte retrieval (a procedure used during IVF)
  • osteoarthritis of the knee

Scientific trials conducted to investigate the effect of acupuncture on these conditions found that acupuncture had a beneficial effect.

However, because of disagreements over the way acupuncture trials should be carried out and over what their results mean, this evidence does not allow us to draw definite conclusions.

Some scientists believe that good evidence exists only for nausea and vomiting after an operation. Others think that there is currently not enough evidence to show that acupuncture works for any condition.

More research is needed to investigate whether acupuncture works for these conditions.

Negative evidence

There is some evidence that acupuncture does not work for:

  • rheumatoid arthritis
  • stopping smoking
  • losing weight

This means that when scientific trials were conducted to see if acupuncture helped patients in these cases, they found that the treatment had no effect.

As with the positive evidence on acupuncture, this evidence does not allow us to draw definite conclusions. More research is needed into the effectiveness of acupuncture for these conditions.

Inconclusive or no evidence

For most conditions against which acupuncture is used, we do not have enough good-quality evidence on the effectiveness of acupuncture. More research is needed before we can draw conclusions on whether acupuncture is effective for the following conditions:

  • addictions
  • asthma
  • chronic pain
  • depression
  • insomnia
  • neck pain
  • sciatica
  • shoulder pain
  • stroke
  • tinnitus

Further reading

This information is based on The Desktop Guide to Complementary and Alternative Medicine: An Evidence-Based Approach (2006). 2nd edition. Ernst E, Pittler MH and Wider B, eds.

Last reviewed: 18/03/2010

Next review due: 18/03/2012

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Mittwoch, Juni 29, 2011

德国科学家发表肠病疫情初步总结报告 - 超级苹果网新闻


德国科学家发表肠病疫情初步总结报告
2011年06月29日 22:25 新华网 浏览:3

新华网柏林6月28日电(记者班玮)德国研究人员近日在美国《新英格兰医学杂志》上就已历时一个多月的德国大肠杆菌疫情发表了首份初步总结报告,结论是导致本次疫情的是一种具有特殊毒性的大肠杆菌,其来源很可能是人类。

这份报告由德国联邦公众传染病预防与监控主管机构——罗伯特·科赫研究所和德国汉堡-埃彭多夫大学的医学院研究人员联合完成。报告已不再将本次疫情致病菌称为肠出血性大肠杆菌,而是采用了更准确的说法:产志贺毒素O104:H4型大肠杆菌,因为本次暴发菌株表现出了典型的肠聚集性大肠杆菌和常见的产志贺毒素大肠杆菌这两类不同的大肠杆菌混合的毒力特性。

报告说,目前科学界已猜测本次暴发菌株是一种典型的肠聚集性大肠杆菌通过噬菌体获得一种产志贺毒素编码基因而产生的变种。兼具肠聚集性和产志贺毒素特点的大肠杆菌虽然以前也曾被发现过,但非常罕见。由于典型的肠聚集性大肠杆菌一般以人类为原始宿主,因此德国研究人员推断本次暴发菌株也很可能源自人类。

报告还指出,本次德国疫情与以往产志贺毒素大肠杆菌造成的疫情不同,其特点为:一、感染病例中溶血性尿毒综合征重症病例所占比例达25%,远高于以往疫情;二、溶血性尿毒综合征病例中成人患者约占89%,且多数是女性。而以往产志贺毒素大肠杆菌感染者多数是儿童,且没有明显性别差异;三、以往疫情致病菌大多数是血清型O157型大肠杆菌,这次则是O104型;四、本次感染的潜伏期平均为8天,以往则是3至4天。

研究人员通过调查统计数据还发现,本次疫情中成人患者和儿童患者的症状也有区别,成人多出现出血性腹泻伴腹部痉挛,而儿童患者则经常出现呕吐。这种特异性则是科学界仍需深入研究的未解之谜。

研究人员在报告中还特别指出,德国的疫情近期虽明显缓解,但并未结束。据罗伯特·科赫研究所28日公布的最新疫情通报,德国一个多月来肠出血性大肠杆菌感染病例累计达3901例。截至27日,死亡患者已达47人。

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