Monday, April 30, 2007

KFC, Taco Bell Oil Change

KFC, Taco Bell switch to oil with no trans fat at U.S. restaurants

Fried chicken restaurant chain KFC announced Monday all 5,500 of its U.S. restaurants have stopped frying chicken in artery-clogging trans fat.

The company said in October it was switching to a new soybean oil believed to be less likely to cause heart disease. "This idea is a positive one for consumers and we do expect it's going to really appeal to people and bring them into our stores," said James O'Reilly, KFC's chief marketing officer.

The zero grams trans fat items at KFC also include its potato wedges. Some of KFC's non-fried items still contain trans fat, including biscuits, pot pies, macaroni and cheese and some desserts. The company said it's working to remove trans fat from those items.

KFC said the change in cooking oils will not change how its fried chicken tastes.

Sister brand Taco Bell also said Monday its U.S. restaurants have completely switched to an oil with zero grams of trans fat. All 4,200 single-brand Taco Bells were converted to a canola oil and all 1,400 multibrand locations switched to a soybean oil, the fast food chain said.

There are 23 Taco Bell items that contain no trans fat, including the chicken and beef crunchy taco, grilled steak soft taco, chicken and steak Gordita Supreme and the chicken and steak Chalupa Supreme. Taco Bell said it's working to remove all trans fat from all its ingredients.

The two chains are subsidiaries of Louisville-based Yum Brands Inc., whose brands also include Pizza Hut, Long John Silver's and A&W All-American Food Restaurants.

The announcements come amid a push to rid diets of trans fat. New York City and Philadelphia have required restaurants to phase out trans fat by next year and bills to restrict or ban trans fat in restaurants or school cafeterias have been introduced in a number of states.

Doctors say trans fat - listed on food labels as partially hydrogenated vegetable oil - can raise bad cholesterol and lower healthy cholesterol.

Other companies including Wendy's International Inc., Starbucks Corp., McDonald's Corp. and Burger King Holdings Inc. have said they will phase out trans fat from their products.

Denmark is the only country to have sharply limited trans fats, passing a law in 2003 making it illegal for any food to contain more than two per cent trans fat. Canada is looking at similar legislation and the Netherlands has encouraged voluntary labelling.

Source: CBC.ca

Wednesday, April 25, 2007

BBQ Beware

Toxic products found in blood of BBQ lovers

As barbecue season gets underway, a new study suggests a class of toxic chemicals released by grilling, broiling and frying meat may increase the risk for life-threatening diseases.

"Advanced glycation end products," also known as AGE products or AGEs, are produced and absorbed into the body when meat or cheese is cooked at high temperatures, or foods are sterilized or pasteurized, researchers at Mount Sinai School of Medicine in New York said.

When AGEs build up in the body, oxidative stress — damage linked to aging — results.

In a study appearing in the April issue of the Journal of Gerontology: Medical Sciences, Dr. Helen Vlassara and her colleagues tie AGE products to heart disease, diabetes and kidney disease. The results are an indicator of a link between high-temperature cooking, AGEs, and activation of the immune system that triggers inflammation.

"A sustained and chronic inflammation damages the tissues," Vlassara told CBC News. "Therefore it will damage the heart, it will damage the kidneys and the brain

Put levels on labels: researcher

The study involved 172 healthy men and women who were divided into two age groups, those 18 to 45 and those 60 to 80. Participants had their body weight and body fat measured, completed a three-day food diary, and had blood samples collected.

AGE levels tended to be higher in older people, whose bodies seem to have less ability to remove the chemicals, the researchers found.

"Excessive intake of fried, broiled, and grilled foods can overload the body's natural capacity to remove AGEs," said Vlassara, who called for the levels to be put on nutrition labels, just as trans fat, calorie and sugar content are identified.

The researchers also found that the more people ate foods rich in the compounds, the higher their blood levels of AGE and markers for inflammation such as C-reactive protein. Levels of AGEs in some healthy adults were similar to those seen in people with diabetes in earlier studies, according to the researchers.

Cooking alternatives

It is clear that AGEs are another factor in the aging process, said nutrition researcher Dr. David Jenkins of St. Michael's Hospital in Toronto.

Jenkins joined Vlassara in suggesting that boiling, steaming and stewing are the safest ways to cook food, not only because of AGEs, but also given warnings about cancer-causing byproducts of high-temperature cooking such as acrylamide.

"I'm a great one for recommending people have a pretty, pretty drab life," Jenkins said. "So I like them having things that are boiled, tofu, all sort of things that everyone sort of turns up their nose at."

The occasional barbecue is probably OK, Vlassara said, noting AGEs also give foods desired tastes and smells.

There is currently no readily available clinical test to measure AGE levels in the blood.

For people who enjoy their steaks marinated, there is some evidence that adding acidic liquids such as lemon or vinegar might help to counteract some of the AGEs, Vlassara said.

Source: CBC.ca

Tuesday, April 24, 2007

Monday, April 23, 2007

Laughing Health Benefits

According to a study in the INternational Journal of Obesity, laughing out loud can help you burn more calories. For 90 minutes 45 people watched videos that were funny (Austin Powers) or big snooze fests (a show about the English countryside) while scientists measured their heart rate and calorie burn. Laughing out loud increased both numbers by up to 20% compared with watching quietly. So giggle for 15 minutes a day could burn as many as 50 calories.
Source: Women's Health April 2007

Friday, April 20, 2007

Whole Grain Oats Cholesterol Reduction Link

Whole-grain oats may help reduce cholesterol: review

Whole-grain oats may help lower cholesterol in people at risk for heart disease, according to a review.

Researchers looked at 10 short-term trials that studied a total of 914 adults who had at least one major risk factor for heart disease.

The studies suggested whole grains can help lower both total cholesterol and unhealthy low-density lipoprotein or LDL cholesterol levels — both risk factors for heart disease.

When the results were pooled, the average reduction was 7.7 milligrams per decilitre in total cholesterol levels, and 7 milligrams per decilitre for LDL among people who ate whole-grain oatmeal compared with those who ate refined grains.

There is enough evidence to suggest recommending oats as part of cholesterol-lowering programs, the review concluded, but the positive effect should be interpreted cautiously, the researchers said in the Cochrane Database of Systemic Reviews.

The trials involved small numbers of people, lasted at longest four to eight weeks, and most were funded by companies that sell whole grains.

Well-designed, adequately powered studies are now needed to evaluate the effects of long-term consumption of oats," said study author Sarah Kelly of the School of Health and Social Care at the University of Teesside, England.

To minimize the risk of developing high levels of LDL, Health Canada recommends:

  • Maintaining a healthy weight.
  • Getting at least 30 minutes of exercise a day.
  • Not smoking.
  • Reducing total fat in the diet, especially curbing unhealthy saturated and trans fats.
  • Eating more soluble fibre, found in bran, oatmeal, barley, psyllium, kidney beans, apples, strawberries and pears.

There was a lack of studies on other whole grains or whole-grain diets, the study's authors said.

Source: CBC.ca

Thursday, April 19, 2007

Wednesday, April 18, 2007

New Not-for-Profit Online Medical Journal Launch

Open Medicine launches Wednesday

A new open-access general medical journal, published in Canada, is about to be born.

Editors of Open Medicine, a journal that won't charge subscription fees and won't run advertisements for medical devices or drugs, say they will go live online with the new publication on Wednesday.

The idea for the journal was conceived last year in the wake of the firing of the editor and deputy editor of the Canadian Medical Association Journal.

Dr. John Hoey and Anne Marie Todkill were fired by the CMAJ's publisher in what is believed to have been a conflict over editorial independence between the journal and its owner, the Canadian Medical Association.

Hoey and Todkill are playing a role in the development of the new journal, along with a number of the CMAJ's former editors and editorial board members.

Co-editors of Open Medicine will be Dr. Anita Palepu, a general internist at St. Paul's Hospital in Vancouver and Dr. Stephen Choi, a former editor of the CMAJ.

The new journal will work on a different model from traditional medical journals, with no print edition.

All articles will be available for free online; all rights to the published material will rest with the authors, not the journal, which will be run on a not-for-profit basis.

Dr. Palepu says the new journal will be more independent that most journals, which are owned by a corporation or a national medical association.

Source: TheGlobeandMail.com

Tuesday, April 17, 2007

Stimulant Warning

Cramming students cautioned against taking stimulant without prescription

University students hitting the books for final exams in Calgary are popping prescription stimulants that carry the risk of side-effects, doctors warn.

Dextroamphetamine, sold as Dexedrine, or "dex," is prescribed to treat narcolepsy, or sudden sleep attacks, and for people with attention deficit hyperactivity disorder, to help them focus and concentrate better. For those who do not have ADHD, the drug works like a stimulant.

"I think it is a time-release kind of drug, so it just slowly goes through your body," said a first-year business student at the University of Calgary, who did not want his name used because he buys Dexedrine for five dollars a pill from a friend with ADHD.

"Before you know it, well geez, I've done four hours of hard-core studying and I remember every bit of information," he said, adding he thinks the drug has helped him to achieve higher marks. "I take it before an exam so I'm extra focused."

Dexedrine should not be taken without a prescription, said Dr. Prem Chengalath, a physician in Calgary.

"It has side-effects. It has addictive properties as well," Chengalath said. "Anything which gives you a high is going to give you a low, and sometimes it could be a very bad low."

Taking Dexedrine without a prescription may also lead to disrupted sleep patterns, loss of appetite and elevated heart rate, said Debbie Breckner, director of the university's Wellness Centre. It's not recommended for coping with stress or dealing with exams, Breckner said.

It is not known how many students are using Dexedrine to study. Robin Tribble said its use is widespread among her friends in first year, who live in residence. Some of the people are now dependent on Dexedrine for studying, Tribble said.

Tribble questions Dexedrine use, saying it is unrealistic for students to plan to use it to deal with stressful situations for the rest of their lives.

Officials at the wellness centre are not overly concerned, saying their doctors have not seen an increase in discussions with students who may be using Dexedrine.

Source: CBC.ca

Monday, April 16, 2007

Cosmetics and Cancer Potential

Amy Robertson is about as natural as a Canadian can be.

Without a trace of makeup, her blond hair usually cinched in a ponytail, the former organic farmer and health-food store clerk from Vancouver scrupulously avoids preservatives and pesticides in her food. She was also tested last year by researchers collecting proof of toxic chemicals in the body.

But what she discovered shocked her -- her clean-living body was distressingly polluted with heavy metals and PCBs. If the 43-year-old is disciplined about what goes into her mouth, she is anything but when it comes to what she puts on her skin. Inspecting her herbal shampoo label for the first time, she finds cocamidopropyl hydroxysultaine and methyl cocoyl taurate, the stuff of chemistry labs.

"I've always said to the kids, 'If you can't pronounce an ingredient, we won't buy it,' " Ms. Robertson says. "But I have obviously not been that good with cosmetics."

Few have. While Canadians have become savvy about chemicals in their food -- scanning package labels and paying premium prices for organic produce -- little mention has been made of the chemicals that clean our hair and moisturize our skin day in and day out.

Yet some of the 10,000 ingredients in beauty products are suspected or confirmed carcinogens, hormone-mimicking chemicals or substances linked to birth defects. And in an age of increasing fear over chemical exposures, the $5.3-billion cosmetics industry is poised to become the new frontier for health and eco-minded consumers.

Under new federal rules that came into force late last year, cosmetics companies selling products in Canada are compelled to list ingredients on their packages -- a move that has brought this country closer into line with Europe and the United States, where, for some, checking the label on a lipstick is as routine as reading a cereal box.

Some cosmetics ingredients will also go under the microscope when Ottawa begins a massive safety review of thousands of chemicals in widespread use that was announced last winter.

And later this month hearings will begin in Ontario on a private member's bill tabled by NDP environment critic Peter Tabuns that would slap warnings on all cosmetics and other products containing known and suspected carcinogens.

Outside Canada, a law just passed in California placing the onus on cosmetics companies to disclose to health authorities the details of toxic ingredients linked to cancer or reproductive problems.

"The fact is, we're using so many different cosmetics and we're putting them directly onto our skin," says Madeleine Bird, a Montreal health researcher who founded a Canadian counterpart to the Campaign for Safe Cosmetics, a U.S. coalition of health and environmental activists, last year. "We use them on our babies. It's a very intimate part of our daily lives and we want that to be as safe as possible."

But while even those in the Canadian cosmetics industry laud the move to list contents on packaging, many consumers are discovering that these labels are hardly founts of information. Ingredients are listed by unfamiliar Latin names that obscure even benign substances -- shea butter becomes butyrospermum parkii.

Unless shoppers splurge on an $1,100 dictionary to cross-reference ingredients, they are left no wiser than they were before the new rules. This is why the Canadian Cancer Society is tossing around the idea of a colour-coded logo that would flag possible carcinogens. The Canadian Strategy for Cancer Control committee also has product labelling on their agenda.

"When you pick up something at the grocery store, it should immediately tell you something about what's in that substance [so] you can make an informed decision," says Heather Logan, the director of cancer control policy at the Canadian Cancer Society. "We don't have that yet."

Aside from labelling, Health Canada does maintain a hot list of more than 500 banned and restricted chemicals. Companies selling cosmetics here are also required to disclose the ingredients contained in their products to Ottawa.

In the United States, ingredients have been listed on cosmetics for years. But there are loopholes that allow companies to conceal some suspect chemicals under the vague title of "fragrance" or refuse to name ingredients that are claimed to be trade secrets.

"There are some ingredients that have benefits and some risk as well," says Carl Carter, director of the Canadian Cosmetic, Toiletry and Fragrance Association. "But our feeling is that under the Canadian regulatory system, we are very confident about the safety of the substances that are used."

Some health and environmental activists don't agree. They want Health Canada to use warning labels to protect Canadians from questionable chemicals -- or to follow the aggressive stance of the European Union, where more than 1,100 chemicals in cosmetics have been banned outright.

The battle comes back to science. Research on chemicals in cosmetics is spotty. Many compounds have never been studied. Others are linked to cancer or birth defects in animals but not people -- or show a link to cancer, but at far higher doses than the levels present in cosmetics. In fact, the studies making the airtight case connecting compounds to cancer are few.

To the industry, these studies suggest that their products are safe. To activists, the science overlooks the fact these minute chemical exposures in cosmetics are repeated with successive products -- soap, deodorant, makeup -- every day.

But even where conclusive scientific evidence exists, it has not swayed health authorities in Canada or the United States to ban the substances from widespread use.

In the face of this, the Washington-based Environmental Working Group started an online listing called Skin Deep that ranks the safety of 14,000 cosmetics -- about half of those on the market -- according to their safety as determined by the research available.

And for the past four years, the Campaign for Safe Cosmetics in the U.S. has been pushing 500 companies -- most of them small "green" producers -- to sign a pact to substitute toxic ingredients with safe alternatives. The Body Shop, recently purchased by L'Oréal, is the biggest convert to date.

Meanwhile, growing unease about cosmetics is boosting sales of alternative products -- both at health-food stores and grocery chains. Some of these products have simply disguised suspect ingredients in earthy-looking packaging touting "natural" or "herbal" properties. But a growing number of companies are starting to sell chemical-free cosmetics. And a U.S. financial research firm recently published a report suggesting that those who ignore the push for healthier products risk a backlash.

New cosmetics brands are also emerging. Alain Menard and his wife, Karen Clark, started the Green Beaver Company in Hawkesbury, near Ottawa, after the birth of their first child three years ago. At the time, he worked as a microbiologist in pharmaceuticals and she was a biochemist with a pesticide company. But neither wanted their son exposed to the chemicals in cosmetics and both saw a market niche for an all-natural Canadian cosmetics company.

Mr. Menard welcomes the new labelling law in Canada, sure it will expose the pretenders marketing supposedly natural and organic products that are neither.

But he, too, worries about the confounding Latin names, fearing that customers will feel threatened by natural ingredients that sound like chemicals. "There may be some confusion about what these terms mean," he says.

Take Ms. Robertson. As she reads through the label on her shampoo, the names grow longer and more complicated. As hair-care products go, it ranks among the more benign. Still, it does contain methyl, ethyl, propyl and butyl parabens. In the bottle are ingredients considered to be toxic, endocrine disruptors and harmful to wildlife -- a rude shock to the Vancouverite, who buys her cosmetics at a health-food store.

"To be quite honest, I'd never read down that whole ingredient list until now," she says. "I don't know what all the parabens are."

Margaret Philp is a feature writer with The Globe and Mail.

Pretty dangerous

Some compounds in personal-care products are worth watching out for.

Lead acetate: A known reproductive toxin banned in the European Union but found in some hair dyes and cleansers in North America.

Formaldehyde: A known carcinogen found in some nail products.

Toluene: A possible reproductive or developmental toxin found in some nail polishes.

Petroleum distillates: Possible carcinogen prohibited in the EU, but found in some mascara, perfume and lipstick in North America.

Ethyl acrylate: A possible carcinogen found in some mascara.

Coal tar: A known carcinogen found in dandruff shampoos, anti-itch creams and hair dyes.

Dibutyl phthalate: An endocrine disruptor and possible reproductive or developmental toxin found in some nail polish, perfume and hair spray.

Sodium lauryl sulfate: A skin irritant prone to contamination by a probable carcinogen called 1,4-dioxane used in many soaps and shampoos for its foaming properties.

Methyl, propyl, butyl and ethyl paraben: Endocrine disruptors and possible breast carcinogens used as a preservative in cosmetics such as lotions and shampoos.

-- Margaret Philp

Source: Campaign for Safe Cosmetics, Environmental Working Group

Source: theGlobeandMail.com (April 14, 2007)

Friday, April 13, 2007

Obesity Genetic Link Discovered

Genetic link found for obesity

A gene variant common in the European population has been discovered that shows the first clear link to obesity, researchers say.

The gene, called FTO, was found by studying the genome of 39,000 white people in the United Kingdom, Finland and Italy who gave blood samples, the team said in Thursday's online issue of the journal Science.

People who had two altered copies of the gene were about three kilograms heavier on average, and had a 70 per cent higher risk of obesity than people with no copies of the gene. Those with one copy had a lesser but still elevated risk of having a higher fat mass.

About 63 per cent of people surveyed had one or two copies of the mutation, and the effects of the gene were seen by age seven, said the researchers, who set out to look for genes that increase susceptibility to Type 2 diabetes.

"Our findings suggest a possible answer to someone who might ask, 'I eat the same and do as much exercise as my friend next door, so why am I fatter?' said Prof. Andrew Hattersley from the Peninsula Medical School in Exeter, England.

"There is clearly a component to obesity that is genetic."

Tackling rise in obesity

The researchers said they do not know why people with copies of the FTO mutation put on more weight, because the function of the gene is unknown. For example, it may cause people to store fat more efficiently.

By identifying the genetic link, the researchers said they hope to explore new ways of treating obesity, such as drugs that target the gene. They also aim to look for the FTO gene in South Asians and blacks, since finding it in more than one population would make genetics researchers more confident about the link.

Of the participants in the study, about 25 per cent were considered obese, based on their body mass index, a relationship between height and weight.

Role of environment

Genes alone are unlikely to be a major factor behind surging obesity rates, since genetic changes do not happen on a scale of 20 to 30 years, scientists say.

The obesity rate among Canadian boys jumped from two per cent to 10 per cent in the last 15 years, and from two per cent to nine per cent among girls, according to guidelines published earlier this week in the Canadian Medical Association Journal.

Poor diet, lack of exercise and genetics all contribute to the problem, said Dr. Glenn Berrall, head of the pediatric nutrition clinic at North York General Hospital in Toronto.

"We seem to be living in an environment that fosters excess weight," Berrall told CBC Newsworld on Thursday.

Factors include:

  • Lack of opportunities for physical activity in school or in daily life.
  • Ease of transportation.
  • Perceptions of unsafe environments and neighbourhood designs that deter walking.
  • Easy and frequent access to high-calorie foods.

All levels of society and governments have a role to play, such as offering nutrition labelling, school nutrition and physical activity programs, and healthy role models from parents, Berrall said.

Last fall, the International Congress on Obesity heard that more than 1.5 billion adults and 10 per cent of children are overweight or obese. The excess pounds increase the risk for heart disease, Type 2 diabetes, high blood pressure and some cancers.

Source: CBC.ca

Thursday, April 12, 2007

Wednesday, April 11, 2007

Mandatory High School Phys Ed -All Grades

Manitoba to make phys-ed mandatory for Grade 11 and 12 in 2008

As part of a push to encourage healthy lifestyles for young people, the Manitoba government is making physical education part of the curriculum for Grade 11 and 12.

Education Minister Peter Bjornson says the new requirement will take effect in September 2008.

He says students will be able to earn the required phys-ed or health credits either in class or through outside activities such as intramural and inter-school sports or community-based sports.

They will be encouraged to find activities suited to their interests and abilities.

The addition to the curriculum is one of the government's responses to an all-party committee's report on healthy kids released in 2005.

Bjornson made the announcement Tuesday at a Winnipeg high school, where he joined Healthy Living Minister Kerri Irvin-Ross and students in a game of basketball.

Source: CBC.ca

Tuesday, April 10, 2007

Salt Overconsumption by Canadians

Fast-food folly - Canadians consume too much salt, risk illness, study finds

A new study suggests most Canadians are consuming far more salt in their average daily diet than is necessary or recommended.

The Statistics Canada study, based on a 2004 survey, found that average daily sodium intake was far beyond the recommended upper limit, regardless of age.

Among adults ages 19 to 70, the upper limit was surpassed by more than 85 per cent of men and 60 per cent of women.

The tolerable upper-intake levels for sodium established by the independent Institute of Medicine in Washington, D.C., range from 1,500 to 2,200 milligrams a day for children aged one to three, to a maximum of 2,300 mg for people aged 14 or older.

The study found that in 2004, the average for all Canadians was 3,092 mg of sodium a day, a third more than the point beyond which the risks of adverse health effects, especially those linked to hypertension, rise significantly.

Sodium consumption exceeded the recommended levels throughout the country, but two provinces stood out - Quebec and British Columbia, where the average daily intake for people aged one or older was around 3,300 mg.

A relatively small grouping of foods accounted for close to a third of all the sodium Canadians consumed in 2004: The "sandwich" category - pizza, sandwiches, submarines, hamburgers, hot dogs - led the way, representing 19 per cent of sodium intake, while soups accounted for seven per cent and pasta dishes made up six per cent of salt intake.

Source: CBC.ca

Friday, April 6, 2007

Absolute Trans fat Removal Lobby

Cut trans fats from food supply, health groups tell Ottawa

Harmful trans fats should be eliminated from Canada's food supply, health advocates told the federal government on Thursday.

The report by the Heart and Stroke Foundation of Canada and Toronto Public Health calls on the government to act now on last summer's recommendations from a federal task force.

The task force sought a trans fat limit of two per cent of total fat content in spreadable margarine and five per cent in all other foods.

"Trans [fats] are not a choice, they're a killer," said Sally Brown, CEO of the Heart and Stroke Foundation of Canada, who co-chaired the task force of scientists, health experts, and the food and restaurant industries.

Trans fats raise the levels of low-density lipoprotein, or "bad" cholesterol, in the body and can lead to clogged arteries and heart disease.

The foundation estimates consumption of trans fats accounts for 3,000 to 5,000 Canadian deaths from heart disease annually.

Cities weigh voluntary limits, bans

David McKeown, Toronto's medical officer of health, also urged the federal government to mandate the limits as soon as possible to protect all Canadians, including those who do not read food labels, can't speak English or French, or have low literacy levels.

"In the interim, we will work with various city-run facilities such as child-care centres and cafeterias, as well as school boards, to request that they voluntarily reduce trans fats in foods prepared, served, and sold on site," McKeown said.

Last week, public health officials in Calgary said they would push ahead with a plan to ban trans fats in restaurants by October 2008, which would be a first in Canada.

The Canadian Restaurant and Foodservices Association called Calgary's plan flawed, saying it supports moves for a national trans fat ban by 2010.

A national approach would put restaurants and food retailers on a level playing field, while sending a strong signal to oilseed growers and processors to boost production of healthier alternatives such as sunflower, corn, soybean and canola oil, the CRFA said.

A city-by-city approach would be present difficulties for the food industry, which supplies foods across the country, agreed Stephen Samis, director of health policy for the Heart and Stroke Foundation.

Foods contain dangerous levels

While nutrition labels have helped for some packaged goods, a Heart and Stroke survey released with Thursday's report found dangerous amounts of trans fat are still found in many foods, including those consumed by children.

For example, the foundation found five grams of trans fat in 50 grams of PC Natural Flavour Microwaveable Popcorn — seven times the trans fat limit recommended by the federal task force. Healthier alternatives are available that contain zero grams of trans fat.

"I hope it frightens them," said Carol Dombrow, a dietitian with the Heart and Stroke Foundation. "I hope it wakes up the food-service providers to make a change," which some food manufacturers have already done.

Last week, the parliamentary standing committee on health's report on childhood obesity also called for the task force's recommendations to be adopted.
Source: CBC.ca

Thursday, April 5, 2007

Wednesday, April 4, 2007

Tuesday, April 3, 2007

ABC's of Common Medical Tests

One thing we all have in common is that at one time or other our doctors are going to send us for medical tests—and some are going to be required regularly. Something many of us share is nervousness about some of these tests.

But many of these tests have some things in common as well: they can help prevent disease, they can provide an early diagnosis of disease that increases the chance of successful treatment and they aren't half as bad as they sound! Understanding that may be all the encouragement most of us need.

What follows is some basic information about some of the more common tests. Some preparation for these tests will differ for pregnant women or people who have other conditions or diseases. Talk to your healthcare provider.

Bone density test

If your healthcare provider has reason to believe that you are at higher risk for osteoporosis or that the thickness of your bones needs to be monitored, you might be sent for a bone density test. This test uses a type of x-ray to measure how dense, or thick, your bones are by calculating how much calcium and other minerals are present.

No preparation is needed, and the test is quick and painless. You will likely be asked to lie on a table while the x-ray scans parts of your spine, hips and possibly other parts of the body.

Generally, this test is recommended for Canadians aged 65 and over or those with specific risk factors for osteoporosis.

Complete Blood Count (CBC)

It sounds pretty intensive, but if your healthcare provider wants to take a CBC—which is typically standard during a complete physical—it won't involve anything more than one needle prick to the arm so the lab technician can withdraw a few vials of blood. The blood is sent off to a lab, where it is used to assess your general blood health—number of white and red blood cells, amount of haemoglobin and so on—to diagnose diseases and conditions such as anemia, as well as acute and chronic infections.

Blood samples are also used to measure levels of glucose in the blood and to screen for diabetes. A glucose test may involve blood being taken from the arm or by a prick of the finger. Some glucose tests involve fasting, some involve drinking a sweetened drink prior to the test and some do not require any change in eating or drinking.

Blood tests are also used to check blood cholesterol levels to determine whether the levels in your blood are within healthy range. Unhealthy cholesterol levels are a risk factor for heart disease.

CT scanning

A CT (computerized tomography) scan, sometimes called a CAT scan, is an incredibly useful tool that provides health professionals with a multidimensional view of the inside of the body. It can detect early problems such as cancer and cardiovascular disease, including stroke, with its special x-rays that take pictures from many different angles. The images are then reassembled by a computer to form a detailed picture of your interior.

Preparation for the test depends on what area you are having scanned. Some CT scans require nothing special, while others require drinking water or taking a contrast material by mouth, IV or enema to give the radiologists a clearer picture. You can wear comfortable clothes but you will be asked to remove jewellery and other metal objects.

The machine is a large square with a hole in the centre. The table you lie on slides back and forth through the hole while a rotating x-ray takes the pictures. You will hear noises, you may be asked to hold your breath from time to time, and you will be alone in the room but in constant contact with the radiologist, who will be speaking to you over intercom. The procedure itself is painless and typically fairly quick, between 5-30 minutes. Illustration of a notepad and pen

Echocardiogram

A simple echocardiogram is a completely painless ultrasound (soundwaves) test used to get a two-dimensional, cross-sectional picture of your heart.

No preparation is needed; you will wear a gown and lie on a table to be examined. Electrodes are attached with sticky paper to your chest and shoulder to record the results of the test. The technician will then put cool gel on the chest and use the ultrasound wand, or transducer, to move around the area and take measurements of the heart chambers. To get various views of the heart, you will be asked to shift positions.

Fecal occult blood test (FOBT)

The Canadian Cancer Society recommends that men and women age 50 and over have a fecal occult blood test (FOBT) at least every two years. The FOBT is a test to find blood in the stool that is not visible to the naked eye. Three separate stool samples are collected by a person in their own home and then brought to a laboratory for analysis. FOBT blood testing helps identify small growths or polyps early before they become cancerous. The presence of blood does not necessarily mean cancer – it could be caused by a non-cancerous condition. If blood is found, more testing is necessary to find out if it was caused by cancer.

Colorectal cancer is one of the most detectable and, if found early, most treatable types of cancer, but is currently Canada's second biggest cancer killer after lung cancer.

Those who are at higher than average risk of developing colorectal cancer should discuss an individual plan of monitoring with their healthcare provider.

Follow-up for a positive test could include a colonoscopy, double contrast barium enema (an x-ray of the large intestine) and sigmoidoscopy.

Mammography

A mammogram is a low-dose x-ray used specifically to screen for, or detect, breast diseases in women. A screening mammogram may be recommended by your healthcare provider to determine whether your breasts are healthy. Mammograms also help doctors detect and diagnose early breast cancer in women who may be experiencing abnormalities.

Women between 50-69 years should have a mammogram every two years. If you are under age 50 or over 69 and are at a higher risk for breast cancer, you should discuss with your healthcare provider when mammography may be appropriate for you. Women over age 40 should have a clinical breast examination by a trained health professional at least every two years.

Mammograms are not painful—for some people, in fact, they are absolutely painless—but they can cause discomfort if your breasts are sensitive. Whenever possible, try to schedule a mammogram for a less tender time of the month—ideally, about a week after your monthly period has ended. Do not wear deodorant the day of the test or, if you do, you will be asked to remove it as it can interfere with the images. You will be asked to put on a hospital gown.

The images are taken while you stand up, pressed against the mammography machine with one breast firmly compressed by a plastic paddle. Typically, two images are taken of each breast, and your position will be readjusted between each one. If you do experience discomfort, it will only last a few seconds; if your discomfort is causing you distress, let the technician know and the compression will be eased up. After the test, which takes 20 minutes or so, you will be asked to wait while the pictures are checked for clarity. If further images or tests are required, the clinic or your health care provider will contact you.

Magnetic Resonance Imaging (MRI)

To most people, the MRI may seem similar to the CT scan: both are large machines with tubes or tables going through a hole in the middle; both are scans, sometimes involving the use of contrast material, and both provide an excellent view of the inside of the human body so are great diagnostic tools.

But, unlike the CT scan, the MRI machine is actually a giant magnet, with pulses of energy that go through the part of the body to be scanned bit by bit and which are then assembled into two-dimensional images or three-dimensional models.

The tube for the MRI is much smaller than the CT scan and is not a favourite test of people who suffer from claustrophobia. You should discuss this with your healthcare provider and/or the radiologist beforehand, as this is a common problem.

You will have to lie perfectly still, sometimes for long periods of time, while the MRI does its job. Nothing metal will be allowed into the scanning room with you, as it can be pulled directly into the opening of the magnet. That includes metal in the body as well: you will be screened for dental or orthopaedic implants, pacemakers and so on, and some people with such implants will have to have another kind of test. The test is also very noisy, and some centres allow patients to use earplugs to help block the noise.

Pap smear

According to the College of Family Physicians of Canada, if every woman had a regular Pap smear test, 90% of all cases of cervical cancer could be prevented. That's a pretty compelling reason for every woman who has had sex or has reached the age of 18 to keep tests up to date—that is, every one to three years depending on your test results and your doctor's advice, for the course of your life.

To take a Pap smear—which is a sample of cells from the cervix, the opening of your uterus—your doctor or healthcare provider will ask you to lie on your back on the examination table with your knees bent and open. An instrument called a speculum is inserted to keep the vagina open so the doctor can gently swab the cervix for a sample. To make the test most accurate, you should not use vaginal douches and contraceptive jellies or creams for 48 hours before the test and you should not have intercourse 24 hours prior to the test.

There is no pain during a Pap test; some women may find it a little uncomfortable, but the test only takes a couple of minutes—and the more relaxed you are, the faster and more comfortable it will be. The sample is then sent to a lab and if the cells are normal, your Pap test is negative; if abnormal cells are found—which can be for any number of reasons—your doctor or healthcare provider will discuss next steps with you.

Medical tests are a sometimes a necessary part of life, and their value—preventing and detecting diseases early—is beyond measure.

Source: The Canadian Health Network

http://www.canadian-health-network.ca/servlet/ContentServer?cid=1173755660354&pagename=CHN-RCS/CHNResource/CHNResourcePageTemplate&c=CHNResource&NL=20070401en

Monday, April 2, 2007

Parkinson's Drug Withdrawn from Market

Health Canada is informing Canadians that Permax, a drug used for the treatment of Parkinson's disease, has been withdrawn from the U.S. market amidst concerns about an association with cardiac valvulopathy, a condition involving inflammation or stiffening of the heart valves.

Soft Drinks and Increased Risk of Heart Disease


Source: Men's Health April 2007