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New survey suggests Americans keen for H1N1 vaccine

New survey suggests Americans keen for H1N1 vaccine

Days before the swine flu vaccine becomes available, more than half of U.S. adults say they will get the vaccine for themselves and 75 percent will get it for their children, according to a survey released on Friday.

Forty percent said they would not get the H1N1 vaccine, the team at the Harvard School of Public Health found.

“These findings suggest that public health officials need to be prepared for a surge in demand for the H1N1 vaccine if the H1N1 flu becomes more severe,” said Harvard’s Robert Blendon, who led the study.

The survey conflicts with one published earlier this week by Consumer Reports showing only 35 percent of Americans would definitely have their children vaccinated.

The Harvard researchers polled 1,042 U.S. adults for what they said was a representative sample of national opinion late last month.

The poll results suggest more people would get a swine flu vaccine than usually get vaccinated against seasonal influenza in the United States, where flu kills an estimated 36,000 mostly elderly people a year.

H1N1 swine flu was declared a pandemic in June and it has circulated globally ever since.

Companies have been rushing to make and distribute vaccines for H1N1 and the U.S. Centers for Disease Control and Prevention says the first 600,000 doses will arrive in cities, states and counties that ordered them next week.

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Pumping Heart

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Pumping Heart

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A pump is a device used to move fluids, such as gases, liquids or slurries. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure; they only displace fluid, causing a flow. Adding resistance to flow causes pressure. Pumps fall into two major groups: positive displacement pumps and rotodynamic pumps. Their names describe the method for moving a fluid.

A positive displacement pump causes a fluid to move by trapping a fixed amount of it then forcing (displacing) that trapped volume into the discharge pipe. A positive displacement pump can be further classified according to the mechanism used to move the fluid:

Rotary-type, for example, the lobe, external gear, internal gear, screw, shuttle block, flexible vane or sliding vane, helical twisted roots (e.g. the Wendelkolben pump) or liquid ring vacuum pumps.

Positive displacement rotary pumps are pumps that move fluid using the principles of rotation. The vacuum created by the rotation of the pump captures and draws in the liquid. Rotary pumps are very efficient because they naturally remove air from the lines, eliminating the need to bleed the air from the lines manually. Positive displacement rotary pumps also have their weaknesses. Because of the nature of the pump, the clearance between the rotating pump and the outer edge must be very close, requiring that the pumps rotate at a slow, steady speed. If rotary pumps are operated at high speeds, the fluids will cause erosion, much as ocean waves polish stones or erode rock into sand. Rotary pumps that experience such erosion eventually show signs of enlarged clearances, which allow liquid to slip through and detract from the efficiency of the pump. Positive displacement rotary pumps can be grouped into three main types. Gear pumps are the simplest type of rotary pumps, consisting of two gears laid out side-by-side with their teeth enmeshed.

The gears turn away from each other, creating a current that traps fluid between the teeth on the gears and the outer casing, eventually releasing the fluid on the discharge side of the pump as the teeth mesh and go around again. Many small teeth maintain a constant flow of fluid, while fewer, larger teeth create a tendency for the pump to discharge fluids in short, pulsing gushes. Screw pumps are a more complicated type of rotary pumps, featuring two screws with opposing thread —- that is, one screw turns clockwise, and the other counterclockwise. The screws are each mounted on shafts that run parallel to each other; the shafts also have gears on them that mesh with each other in order to turn the shafts together and keep everything in place. The turning of the screws, and consequently the shafts to which they are mounted, draws the fluid through the pump. As with other forms of rotary pumps, the clearance between moving parts and the pump’s casing is minimal. Moving vane pumps are the third type of rotary pumps, consisting of a cylindrical rotor encased in a similarly shaped housing. As the rotor turns, the vanes trap fluid between the rotor and the casing, drawing the fluid through the pump.

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Most diabetics falling short on healthy eating

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Most diabetics falling short on healthy eating

Diabetes mellitus is a disease characterized by persistent hyperglycemia (high blood sugar levels), resulting either from inadequate secretion of the hormone insulin, an inadequate response of target cells to insulin, or a combination of these factors. Diabetes is a metabolic disease requiring medical diagnosis, treatment and lifestyle changes.

There are many causes and forms of diabetes known. The three most common patterns of diabetes have been recognized over the last thirty years as type 1, type 2 and gestational diabetes (or type 3)[1], although these three “types” of diabetes are more accurately considered patterns of pancreatic failure rather than single diseases. Each type can be produced by a variety of identifiable or yet-to-be-identified causes. There are some patients whose diabetes cannot be easily fit into one of these types, and some who display characteristics of more than one type at the same time.

Most Americans with diabetes are eating too much fat and sodium, and not enough fruits, vegetables, grains and low-fat dairy, a new study suggests.

The results, say researchers, indicate that many people with diabetes may need more education about the importance of nutrition in managing their condition.

Excess weight is one of the major risk factors for type 2 diabetes, a disorder in which the body can no longer properly use the blood sugar-regulating hormone insulin. Diet, exercise and weight loss are key to managing the disorder, and in some cases, weight loss can reverse the condition.

Yet in the new study, researchers found that of nearly 2,800 middle- aged and older U.S. adults with type 2 diabetes, nearly all were exceeding the daily recommended fat intake. When it came to artery-clogging saturated fat, 85 percent were consuming too much.

Similarly, 92 percent of study participants were consuming too much sodium, which can raise blood pressure and contribute to diabetics’ already elevated risks of heart disease and kidney disease. (See related Reuters Health story today.)

The researchers used a number of nutritional yardsticks, including the Food Guide Pyramid and recommendations by the Institute of Medicine. For example, experts recommend that adults get no more than 20 percent to 35 percent of their daily calories from fat, with less than 10 percent coming from saturated fat.

And if most study participants were getting too much of those nutrients, many were also not getting enough of certain healthy foods, the researchers report in the Journal of the American Dietetic Association.

Less than half were getting the minimum recommended servings of fruits, vegetables, dairy and grains each day.

“I thought we were going to find people who, because they have a chronic disease, were more educated about and more motivated than the average American to eat healthy, but that’s not the case,” lead researcher Dr. Mara C. Vitolins, of Wake-Forest University School of Medicine in Winston-Salem, North Carolina, said in a written statement.

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