中山电子肛肠镜多少钱(中山哪个医院的混合痔好) (今日更新中)

LOS ANGELES, April 3 (Xinhua) -- People with lower levels of vitamin D are more likely to have stiffer arteries and an inability of blood vessels to relax, U.S. researchers have found.This finding also applies to people who are in general good health, according to researchers from the Emory University School of Medicine.The researchers presented their findings on Sunday at the annual American College of Cardiology meeting in New Orleans.Impaired vascular health in correlation with lower vitamin D levels contributes to high blood pressure and the risk of cardiovascular disease, the researchers say.The study involved 554 participants, with the average age of 47 and generally healthy.The average level of 25-hydroxyvitamin D (a stable form of the vitamin reflecting diet as well as production in the skin) in participants' blood was 31.8 nanograms per milliliter. In this group, 14 percent had 25-hydroxyvitamin D levels considered deficient, or less than 20 nanograms per milliliter, and 33 percent had levels considered insufficient, less than 30 nanograms per milliliter.The researchers monitored the ability of participants' blood vessels to relax by inflating and then removing a blood pressure cuff on their arms. To allow blood to flow back into the arm, blood vessels must relax and enlarge -- a change that can be measured by ultrasound. The researchers also made other measurements of smaller blood vessels and examined the resistance to blood flow imposed by the arteries.

WELLINGTON, May 13 (Xinhua) -- While it's long been known that a little sunshine can spread happiness, researchers in New Zealand have found that it can also save the lives of pneumonia patients.Medical scientists have found that vitamin D, which is absorbed through the skin and produced with exposure to sunlight, is a major factor in the survival rate of pneumonia patients.Researchers at Waikato University collaborated with doctors at Waikato Hospital, both Hamilton-based institutions, to study blood samples of 112 patients admitted to the hospital with pneumonia during the winter.They found that those with severe vitamin D deficiency 17 of the patients were more likely to die within a month, compared with patients with normal or slightly low vitamin D levels.Dr Bob Hancox, of the hospital's department of respiratory medicine, said five of the 17 died, a 29-percent mortality rate, compared with four deaths among the 95 patients with higher vitamin D levels, a 4-percent mortality rate."The analysis confirmed that the difference in mortality rates between the two groups was very unlikely to be due to chance," Hancox told Xinhua.Vitamin D deficiency was a concern around the world, Hancox said."Sunlight is the main source of vitamin D, so it tends to be a winter problem in temperate climates when people spend a lot of time indoors. But it occurs in all countries and vitamin D deficiency is believed to be a major problem worldwide."There is accumulating evidence that we need vitamin D to help fight infections, such as pneumonia as we have shown, as well as improve bone health," he told Xinhua."What is not yet clear is whether we can do anything about it. We don't know whether treating people with vitamin D supplements would help to prevent or treat respiratory infections. This is what we need to find out now."Dr Ray Cursons, of the Biological Sciences department at Waikato University, said patient age, sex, additional health conditions, and other prognostic factors did not affect the research outcome, although researchers still could not establish a causal link between vitamin D deficiency and mortality in the patients.Waikato Hospital D respiratory specialist Dr Noel Karalus said it was not yet known whether giving patients vitamin D supplements after their admission to hospital with respiratory tract infections would alter outcomes."It may transpire that vitamin D helps us avoid infection rather than cure it once established."Cursons said the best source of vitamin D was sunlight as dietary sources such as fatty fish and cod liver oil did not contain enough vitamin D."There is still some controversy regarding the optimal daily allowance of vitamin D. How much we absorb through the skin depends on sun exposure, skin type and geographical latitude. M ori and Pacific Islanders absorb less because of their darker skin, and people in colder climates also have lower levels of vitamin D. "Pneumonia is the single largest cause of death in children worldwide, killing an estimated 1.6 million children under the age of five each year, according to the World Health Organization.The research findings are published in the journal Respirology, published by the Asian Pacific Society of Respirology, this month.

SAN FRANCISCO, April 25 (Xinhua) -- Yahoo Inc. on Monday announced that it has acquired IntoNow, a startup company whose technology can let users almost instantly recognize TV content and share favorite programs with their friends.IntoNow has built a technology platform that can automatically identify live television content and any previously aired U.S.- based television programming in the past five years.It also offers an application for iPhone and other devices running Apple's iOS operating system, which can help users connect and engage with their friends around the shows they love.With the application, users can find out what their friends are watching and engage in discussion through their favorite social networks, or discover what shows they have in common with others and which of them are on air right now."Relying on social channels as a means for discovering content - - whether it's on a PC, mobile device, or TV -- is rapidly on the rise," Bill Shaughnessy, Yahoo's senior vice president of product management and product marketing, said in a statement."IntoNow's technology combines the ability to check-in to what a consumer is watching, engage in conversations, and find related content," he added.In a post on its company blog, Yahoo noted that the addition of IntoNow will enhance its video programming, and bolster its social engagement across the Yahoo network and on all screens.IntoNow, headquartered in Palo Alto in the U.S. state of California, was only launched in January 2011 and now has seven employees.Yahoo didn't disclose terms of the purchase. Technology blog TechCrunch reported that Yahoo paid between 20 million to 30 million U.S. dollars, citing sources with knowledge of the deal.

BEIJING, Feb. 14 (Xinhua) -- "Dear Premier Wen, I'd like to tell you the good news first. The problem I brought up at the seminar last year has been solved in Beijing," wrote 34-year-old, wheelchair-bound Li Nan to Chinese Premier Wen Jiabao on Jan. 20 this year.The problem Li referred to was the high prices of one-off hygiene products that had plagued people with work-related spinal cord injuries for a long time.On Jan. 31, 2010, Wen talked with a group of ordinary people in Chaoyang District in Beijing to get their opinions on the draft of a government work report that will be submitted to the national legislature in March.Wen asked Li to be the first to voice her views at the seminar. Li said that patients with spinal cord injuries had to spend about 2,000 yuan (303 U.S. dollars) a month on one-off hygiene products because of their incontinence."My injury allowance is roughly 2,000 yuan a month. I have to live on my parents' pension," she said.She suggested giving more attention to the employment and mental health of the disabled, and also for some revisions on the catalogue of drug and auxiliary devices for those disabled by work-related injuries. She also proposed more subsidies for these people.Responding to the suggestions, Wen said, "Li Nan's case is far from an individual one. The disabled are a very large group of people in China who need more attention... We need to study, revise and renew the government regulations on work-related injury insurance."Wen also encouraged Li to be optimistic in face of ordeals.Li, who graduated from Beijing Youth Politics College in 1997, was once a prize-winning amateur dancer. However, she became confined to a wheelchair after a traffic accident in 2003.On March 5 last year, Li beamed with pride as she watched TV. Premier Wen was delivering the government work report at the annual session of the national legislature.Wen pledged to "work harder to build the social security and social services system for people with disabilities." The premier also promised that "Workers' compensation will be extended to all of the 1.3 million workers injured in previous jobs who are not receiving benefits.""I am thrilled to see that my advice on improving social security for the disabled was included in the government work report," Li said in her letter, which summarized the changes she experienced in the past year because of the improved social security system.The Beijing Municipal Human Resources and Social Security Bureau announced last year that people would be reimbursed for one-off diapers and urine bags under the municipal work-related injury insurance program beginning June 2010."The Beijing policy has relieved our heavy economic burdens and ensured the quality of our life," Li wrote.Li, however, said that though some places has begun to give living and nursing subsidies for the disabled, the policy needs to be extended to other parts of the country.After reading the letter on Jan. 31, Wen Jiabao instructed relevant organs in the State Council, or Cabinet, and the Beijing municipal government "to conduct research and set down policies to better protect and aid people with serious disabilities, and to help them solve their difficulties and improve their quality of life."

WELLINGTON, May 27 (Xinhua) -- Eating kiwifruit might be a much better way of getting vitamin C into your system than taking purified vitamin supplements, according to research from New Zealand.Researchers with the University of Otago found that in mice eating kiwifruit, vitamin C uptake was five times as effective as taking a purified supplement form.The study was published in the American Journal of Clinical Nutrition, the highest ranking journal for human nutrition research, said a statement from the university.Lead researcher Associate Professor Margreet Vissers said people required vitamin C (ascorbate) in all body tissues and organs to be healthy, but the only source of vitamin C was through food or in purified form, arguably the most commonly consumed vitamin supplement.In the experiment vitamin C-deficient mice were fed the vitamin over a month, either as kiwifruit or as an equivalent amount of pure vitamin C, said the statement.Mice fed the kiwifruit absorbed vitamin C much more efficiently than those given the purified supplement form, and they also retained it for longer, indicating something in the fruit improved absorption and retention."The findings of the mouse trial have important implications for human nutrition," said Vissers."The question that has often been asked is whether a supplement is as good a source of vitamin C as whole foods, but few studies have addressed this issue. We are uniquely placed to do that work. "An equivalent human study was underway to determine whether the situation also applied to people, said the statement.The mouse study was funded by the university and kiwifruit marketing firm Zespri.

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