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We give you many useful information about health

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We give you many useful information about health

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We give you many useful information about health

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Tampilkan postingan dengan label worlds. Tampilkan semua postingan
Tampilkan postingan dengan label worlds. Tampilkan semua postingan

Sabtu, 21 Januari 2012

Palm-sized baby among the world's smallest

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14-week-old Melinda Star Guido holds her mother's little finger while lying in an incubator at the Los Angeles County-USC Medical Center in Los Angeles, Wednesday, Dec. 14, 2011. At birth, Melinda Star Guido tipped the scales at only 9 1/2 ounces, a tad less than the weight of two iPhone 4S. Melinda is believed to be the second smallest baby to survive in the United States and the third smallest in the world. (AP Photo/Jae C. Hong) 14-week-old Melinda Star Guido holds her mother's little finger while lying in an incubator at the Los Angeles County-USC Medical Center in Los Angeles, Wednesday, Dec. 14, 2011. At birth, Melinda Star Guido tipped the scales at only 9 1/2 ounces, a tad less than the weight of two iPhone 4S. Melinda is believed to be the second smallest baby to survive in the United States and the third smallest in the world. (AP Photo/Jae C. Hong) Haydee Ibarra, looks at her 14-week-old daughter, Melinda Star Guido, at the Los Angeles County-USC Medical Center in Los Angeles, Wednesday, Dec. 14, 2011. At birth, Melinda Star Guido tipped the scales at only 9 1/2 ounces, a tad less than the weight of two iPhone 4S. Most babies her size don’t survive, but doctors are preparing to send her home as soon as the end of the month. Melinda is believed to be the second smallest baby to survive in the United States and the third smallest in the world. (AP Photo/Jae C. Hong) This undated photo provided by Los Angeles County-USC Medical Center shows shows Melinda Guido shortly after her birth in late August with the hand of Dr. Rangasamy Ramanathan as a comparison. Melinda was born premature at 24 weeks weighing only 9.5 ounces. She's believed to be the second smallest baby to survive in the United States and third in the world. (AP Photo/Los Angeles County-USC Medical Center ) This undated photo provided by Melinda Guido’s family shows Melinda, with her mother's fingers in the scene, in the neonatal intensive care unit at the Los Angeles County-USC Medical Center. Melinda was born premature at 24 weeks weighing 9.5 ounces. She’s believed to be the second smallest surviving baby in the United States and third smallest in the world. (AP Photo/Haydee Ibarra) This undated photo provided by Melinda Guido’s family shows Melinda in the neonatal intensive care unit at the Los Angeles County-USC Medical Center. Melinda was born premature at 24 weeks weighing 9.5 ounces. She’s believed to be the second smallest surviving baby in the United States and third smallest in the world. (AP Photo/Haydee Ibarra)eval("var currentItemd57851005a80479aaeeb90a12c70b9ff = 1;");eval("var nextd57851005a80479aaeeb90a12c70b9ff = 0;");eval("var previousd57851005a80479aaeeb90a12c70b9ff = 0;"); LOS ANGELES (AP) — At birth, Melinda Star Guido was so tiny she could fit into the palm of her doctor's hand. Weighing just 9 1/2 ounces — less than a can of soda — she is among the smallest babies ever born in the world.

Most infants her size don't survive, but doctors are preparing to send her home by New Year's.

Melinda was born premature at 24 weeks in late August and is believed to be the second-smallest baby to survive in the U.S. and third smallest in the world. She spent the early months cocooned in an incubator in the neonatal intensive care unit in Los Angeles.

Despite hurdles, Melinda lived to her original Thursday due date. Doctors say it is too early to say how she will fare developmentally and physically when she grows up.

For now, her 22-year-old mother sits at her bedside almost every day and stays overnight whenever she can.

On Wednesday, Haydee Ibarra caressed Melinda through the portholes of the incubator where nurses pinned up a homemade sign bearing her name. Now 3 ½ months old and weighing 4 pounds, Melinda gripped Ibarra's pinky finger and yawned.

"Melinda, Melinda," she cooed at her daughter dressed in a polka dot onesie. "You're awake today."

During her pregnancy, Ibarra suffered from high blood pressure, which can be dangerous for mother and fetus. She was transferred from a hospital near her San Fernando Valley home to the county's flagship hospital, which was better equipped to handle high-risk pregnancies.

There was a problem with the placenta, the organ that nourishes the developing fetus. The fetus, however, was not getting proper nutrition, blood and oxygen. Doctors knew Melinda would weigh less than a pound, but they were surprised at how small and fragile she was.

"The first few weeks, it was touch and go. None of us thought the baby was going to make it," said Dr. Rangasamy Ramanathan, who oversees premature infants at the Los Angeles County-USC Medical Center.

Even if she survived, doctors told Ibarra and her husband Yovani Guido, children born this extremely premature can have developmental delays and impairments such as blindness, deafness or cerebral palsy.

Ibarra, who previously had a stillborn, told doctors to do whatever necessary to help her baby.

"They said, 'We'll take the chance. Please try.' So we said. 'OK we'll try,'" Ramanathan recalled.

Melinda was delivered by cesarean section at 24 weeks and was immediately transferred to the NICU where a team of doctors and nurses kept watch around the clock. Infants born before 37 weeks are considered premature.

Melinda was kept insulated in an incubator and was hooked up to a machine to aid her breathing. She got nutrition through a feeding tube. Her mother said her skin felt like plastic because it was so thin.

"It takes a lot of good care and a lot of good luck. Most of them don't survive," said pediatrician Dr. Edward Bell of the University of Iowa who keeps an online database of the world's smallest surviving babies who were less than a pound at birth.

The list currently contains 126 babies dating back to 1936. Since submission is voluntary, it does not represent all survivors.

Ten babies weighing less than a pound were born last year and survived. Melinda joins three other tiny survivors delivered this year in Berkeley; Seoul, South Korea; and Iowa City, Iowa. All are bigger than Melinda, who is not eligible to be listed until she gets discharged.

Most tiny babies who survive tend to be female. That's because female fetuses mature faster than males of the same gestational age. Having more developed lungs and other vital organs increases odds of survival.

Bell published a study last year that found many survivors struggle with health and learning problems. For those for whom growth data are available, many are short and underweight for their age.

There are some success stories.

The smallest surviving baby born weighing 9.2 ounces is now a healthy 7-year-old and another who weighed 9.9 ounces at birth is an honors college student studying psychology. Their progress was detailed in a study published this week in the journal Pediatrics by doctors at Loyola University Medical Center in Illinois where the girls were born.

In the past three years, Los Angeles County-USC Medical Center cared for two other babies with extremely low birth weight who survived, but Melinda holds the record at the hospital.

Prematurity comes with high costs. Ramanathan estimates it costs $3,000 to $5,000 a day to care for a premature infant.

A month after birth, Melinda was treated for an eye disorder that's common in premature babies. She faced her biggest test last month when she underwent surgery to close an artery that usually seals after birth.

Ybarra held her daughter for the first time after the surgery. Before that, she could only touch her through the incubator.

The next challenge is learning to bottle feed before discharge. Ramanathan predicted at least another two-week stay, dashing her parents' hopes of taking her home by Christmas.

Ramanathan said doctors don't know how Melinda will fare when she's older. Since she did not have major complications such as bleeding in the brain, he held out hope.

Melinda can breathe by herself, but still uses an oxygen tube as a precaution. On Wednesday, an ophthalmologist checked out her eyes and said everything looked good.

After the checkup, Ibarra lifted Melinda out of the incubator and sat in a rocking chair, cradling her.

___

Follow Alicia Chang's coverage at http://www.twitter.com/SciWriAlicia

___

Online:

Tiniest Babies Registry: http://bit.ly/rvglZQ

Associated Press

Technology



News

Rabu, 09 November 2011

How The World's Tallest Skyscrapers Work

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The Heights

When the Empire State Building was constructed in 1931, it stood 1,250 feet tall. The famous skyscraper was the world's tallest building — and held that title for more than 40 years.

Today the world's tallest building is the Burj Khalifa in Dubai. It stretches more than 1,000 feet above the Empire State Building — 2,717 feet into the air. The Burj Khalifa smashed the record held by Taiwan's Taipei 101, a landmark skyscraper with 101 floors. And at 1,666-feet, Taipei 101 tops the Petronas Towers in Kuala Lumpur by 183 feet.

Designing these massive skyscrapers is a huge challenge for structural engineers. Builders must account for potential natural disasters like earthquakes and hurricanes. They also must take everyday weather occurrences into consideration. Even on a normal day, wind forces can reach more than 100 mph at the very top of very tall buildings.

"There are wind currents that when we're down below [on the ground] we don't even notice," says Kate Ascher. "That building, as it rises, interrupts those flows. The larger the building, the greater the wind flows."

Ascher, the former executive vice president of the New York City Economic Development Corp., explores the inner workings of skyscrapers in her new book, The Heights: Anatomy of a Skyscraper. She tells Fresh Air's Terry Gross that engineers purposefully design buildings to sway back and forth in order to alleviate the pressure caused by these high wind flows.

"If a building weren't able to move at the top, then various structural elements might be damaged because of the wind pressure," she says. "And some, in earthquake zones, will be designed to move a little bit on their foundations as well — so they don't take as much pressure as they would if they were absolutely static."

Ascher explains that the same principle that allows a building to get taller also accounts for its ability to sway. Joints at the corner of steel beams can expand and contract because of changes in the weather or wind, which allows for slight movements at the very top of buildings.

"There's not a precise formula for how much sway a building has, but there is a maximum [amount], which is 1/500 of the building's height," she says. "The minute you get more than that, it's not like the building's going to sway or fall over, but people who are in the buildings themselves will start feeling a little bit queasy."

Some buildings, like the Comcast Center in Philadelphia, are equipped with liquid-filled dampers, which help counteract the sway. The 300,000 gallons of liquid act as a counterweight. China's Shanghai World Financial Center, meanwhile, was built with a hole at the very top of its structure. The aperture is designed to reduce wind pressure by allowing wind to flow freely through it.

Kate Ascher is the former executive vice president of the New York City Economic Development Corp. Enlarge Vornado Realty Trust/Courtesy of the author

Kate Ascher is the former executive vice president of the New York City Economic Development Corp.

Kate Ascher is the former executive vice president of the New York City Economic Development Corp. Vornado Realty Trust/Courtesy of the author Kate Ascher is the former executive vice president of the New York City Economic Development Corp.

In addition to structural concerns, engineers have to worry about the inside of skyscrapers. In a 100-plus story building, circulating clean air and water is not an easy task — particularly when windows don't open. Mechanical areas exist solely to swap inside air with circulating air outside, says Ascher, so you don't have to worry that you're breathing stale air.

"It's a constant process," she says, "and it happens around the clock."

And don't worry about flushing a toilet on the 100th floor, either. Engineers have accounted for that, too, she says.

"There are very sophisticated bends in the pipes to slow the water as it's moving through," she says. "You don't want to hear it as it's moving through the building, so you need to make sure its sound-proofed as well."

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Catherine McKinley is the author of Indigo: In Search of the Color that Seduced the World.</em>

Catherine McKinley is the author of Indigo: In Search of the Color that Seduced the World.

Saturday Night Live</em>'s master of impressions opens up about his drug use after years of child abuse.

Saturday Night Live's master of impressions opens up about his drug use after years of child abuse.

High winds outside, stuffy air inside — The Heights </em>explores these skyscraper issues and more.

High winds outside, stuffy air inside — The Heights explores these skyscraper issues and more.



Health Management



Education Information

Selasa, 20 September 2011

Medical devices for world’s poorest on show

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14 September 2011 Last updated at 00:12 GMT By Anna-Marie Lever Health reporter, BBC News Sidecar to the rescue: One of the medical innovations on display at the Institution of Mechanical Engineers

Voltage regulators, infrared sensor technology and ultrasound scanners are just some of the donated equipment lying redundant in the world's poorest countries.

According to the World Health Organization some three-quarters of medical devices given by rich countries to developing nations remain unused.

In response, the Institution of Mechanical Engineers has called for the development of technologies better suited to emerging nations.

Continue reading the main story Hearing aid In developing nations hearing loss is mainly caused by ear infections which damage the ear drum This means western world hearing aids developed for hearing loss from old age are not suitableThis prototype uses bone conduction to send vibrations to the ear, it looks more culturally appropriate, and is solar poweredAt its London headquarters, the organisation has been showcasing a range of technologies specifically engineered to work in challenging environments.

Currently the lack of electricity, spare parts and trained operators often means that technology developed in richer countries is totally unsuited to working in the developing world.

Prof Chris Lavy, an orthopaedic surgeon who has spent time in Africa, said: "One of the newest hospitals in sub-Saharan Africa was built with infrared sensors to turn the taps on in the operating theatres.

"Wonderful idea, but is it really appropriate in a country where there are no other infrared controlled taps and no engineer to fix them? Within a year most of them had failed, some of them in the off position, and some of them in the on position."

Innovative solutions

To make technology appropriate, the conference organisers' emphasise that it not low tech, but different tech, that is needed.

Continue reading the main story Nipple Shield Antiretroviral drug inserted between silicone and HIV-positive motherBlocks transmission of virus to babyResearch has focused on laboratory studies and talking to mothers about acceptabilityTo roll out in three-five years if funding is availableThis idea was demonstrated by the innovations on show: a solar-powered hearing aid that overcomes the need for expensive batteries, a stethoscope that can connect to mobile phones allowing doctors to monitor hard-to-reach patients remotely, and a nipple shield for breastfeeding mothers who are HIV positive which blocks the transmission of the virus to their babies.

Dr Patrick Finlay, medical division chairman at the Institution of Mechanical Engineers, said: "Simple, inexpensive technologies engineered for use in the developing word have the potential to save thousands of lives.

"It's now up to the engineering and development communities to get these technologies out of the workshop and into the world's poorest countries."

The majority of the displayed technologies were at the prototype stage, needing expansive testing in the field, and funding, before they are able to reach the people who need them.



View the original article here



Peliculas Online

Minggu, 18 September 2011

Medical devices for world’s poorest on show

AppId is over the quota
AppId is over the quota
14 September 2011 Last updated at 00:12 GMT By Anna-Marie Lever Health reporter, BBC News Sidecar to the rescue: One of the medical innovations on display at the Institution of Mechanical Engineers

Voltage regulators, infrared sensor technology and ultrasound scanners are just some of the donated equipment lying redundant in the world's poorest countries.

According to the World Health Organization some three-quarters of medical devices given by rich countries to developing nations remain unused.

In response, the Institution of Mechanical Engineers has called for the development of technologies better suited to emerging nations.

Continue reading the main story Hearing aid In developing nations hearing loss is mainly caused by ear infections which damage the ear drum This means western world hearing aids developed for hearing loss from old age are not suitableThis prototype uses bone conduction to send vibrations to the ear, it looks more culturally appropriate, and is solar poweredAt its London headquarters, the organisation has been showcasing a range of technologies specifically engineered to work in challenging environments.

Currently the lack of electricity, spare parts and trained operators often means that technology developed in richer countries is totally unsuited to working in the developing world.

Prof Chris Lavy, an orthopaedic surgeon who has spent time in Africa, said: "One of the newest hospitals in sub-Saharan Africa was built with infrared sensors to turn the taps on in the operating theatres.

"Wonderful idea, but is it really appropriate in a country where there are no other infrared controlled taps and no engineer to fix them? Within a year most of them had failed, some of them in the off position, and some of them in the on position."

Innovative solutions

To make technology appropriate, the conference organisers' emphasise that it not low tech, but different tech, that is needed.

Continue reading the main story Nipple Shield Antiretroviral drug inserted between silicone and HIV-positive motherBlocks transmission of virus to babyResearch has focused on laboratory studies and talking to mothers about acceptabilityTo roll out in three-five years if funding is availableThis idea was demonstrated by the innovations on show: a solar-powered hearing aid that overcomes the need for expensive batteries, a stethoscope that can connect to mobile phones allowing doctors to monitor hard-to-reach patients remotely, and a nipple shield for breastfeeding mothers who are HIV positive which blocks the transmission of the virus to their babies.

Dr Patrick Finlay, medical division chairman at the Institution of Mechanical Engineers, said: "Simple, inexpensive technologies engineered for use in the developing word have the potential to save thousands of lives.

"It's now up to the engineering and development communities to get these technologies out of the workshop and into the world's poorest countries."

The majority of the displayed technologies were at the prototype stage, needing expansive testing in the field, and funding, before they are able to reach the people who need them.



View the original article here



Peliculas Online