When the negative pressure is released, the chest wall "collapses" and one breathes out.
One of the great innovations in recent years has been negative pressure wound therapy.
This negative pressure causes the chest wall to expand and air is drawn into the lungs through the mouth and nose.
At issue is an innovative technology known as Negative Pressure Wound Treatment (NPWT) that treats and heals wounds, ulcers, and severe trauma injuries.
The two companies disagreed about who was in charge of interpreting a negative pressure test that could have warned workers of the problems.
One example is a device for Negative Pressure Wound Therapy, which was added by CMS to the competitive bidding list as a new category.
FORBES: Washington Is Tightening Its Grip On Medical Decision-making
One company, KCI based in San Antonio, Texas, handles more than half a million support calls a year for their Negative Pressure Wound therapy system.
FORBES: Washington Is Tightening Its Grip On Medical Decision-making
He is restricted to a special "negative pressure" room that traps and cleanses air particles, and medical staff will wear masks when in contact with him.
In other words the iron lung is sealed and attached to bellows, which lower the air pressure inside the iron lung to create a negative pressure.
At any time, if the negative pressure I faced had been coming from within my home, I would have foregone my entrepreneurial life and chosen a different path.
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Thirteen of the 14 criminal charges pertain to the accident itself and are based on the negligent misinterpretation of the negative pressure test conducted on board the Deepwater Horizon.
The campaign sparked a huge discussion about negative pressure from the fashion industry and the media, which were blamed for promoting unhealthy images of impossibly beautiful but anorexic women.
All inpatients at Papworth are now treated in negative pressure rooms to prevent the spread of airborne bugs and those with the infection are cared for away from the cystic fibrosis unit.
Bartlit emphasized in his letter Thursday that cementing failures are a known hazard in the oil industry, with specific tests such as a "negative pressure test" and "cement evaluation logs" designed to identify cementing problems.
But no, in the interest of full transparency, we had Bernanke warning about how the Fed expected still more negative pressure ahead from the housing collapse, worsening labor markets, a credit crunch that may have still more shoes to drop, and revealing that the Fed was also beginning to worry about the potential for rising inflation.
We need to nurture and support students' math abilities during these critical grades, before negative peer pressure takes hold.
We recently saw research that suggested negative radiation pressure in light could lead to a practical tractor beam.
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It was a nasty looking place, but the building is under negative air pressure to prevent the stink from escaping.
Mrs Henshall says the treatment, using the Continuous Negative Extrathoracic Pressure (CNEP) ventilator, was billed to her as "newer and safer", not experimental.
And though it has been long established that teenagers who have good communication with their parents are more likely to resist negative peer pressure, new research shows that it is a boy's mother who is the most influential when it comes to risky behavior, not only with alcohol and drugs but also in preventing both early and unprotected sex.
Obama has stepped up efforts to tell the public about the cuts' negative impact and pressure Republicans who oppose his approach of reducing deficits through a combination of targeted savings and tax increases.
Economic and political pressures do not work well on North Korea's leadership because its central ideology of Juche, translated as "self-reliance, " produces a very negative reaction to outside pressure.
The smaller float creates bigger gains in rallies when buying pressure dominates and there are fewer stock-holders willing to sell, but larger declines if unexpected negative news brings in selling pressure, since there are fewer bargain hunters aware of the stock and looking to buy.
Growing negative sentiment will tend to pressure stocks, so bulls need to see a roll-over in this ratio before concluding a bottom is in place.
In one corner, the powerful negative forces of debt deleveraging will continue to pressure the economy, employment, and income growth in a potentially negative way.
The daily OBV is still negative but has not shown any heavy selling pressure so far.
On Thursday, as the chart shows, the Philadelphia Fed Survey was negative, which damped the enthusiasm and increased the selling pressure.
If there is to be political strife in Indonesia though, the market will be under pressure and the impact on Asia will be negative.
"If they do decide to remove the national ban and leave it up to each local sponsoring organization -- and THAT is what is being considered -- it will be because of pressure from those sponsors, because of the negative effects they see the ban creating, etc, " he wrote.
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