CPR,or cardiopulmonary resuscitation, can save a life and reduce the risk of brain damage from loss of oxygen.

VOA: special.2009.06.09

But a drop in oxygen levels can cause a health emergency in people with heart or lung problems.

VOA: special.2009.07.14

The result is a five to twenty percent drop in the amount of oxygen in the blood.

VOA: special.2009.07.14

Dangerous mountain paths. And they all risk developing a serious health disorder caused by lack of oxygen.

VOA: special.2010.06.30

Engineers had to boil off the remaining oxygen by turning on a heater in the tank.

VOA: special.2009.07.22

Scientists say enough oxygen remains in a person's system for several minutes after breathing stops.

VOA: special.2009.06.09

And there was a new fuel, a mixture of liquid ammonia and liquid oxygen.

VOA: special.2010.07.07

High levels of domoic acid in the sardines may have worsened the effects of oxygen loss in the water as the fish crowded into a limited space.

VOA: special.2011.03.15

At about nineteen-thousand meters, the air is so thin and the amount of oxygen so small that a person needs a lot of special equipment to survive.

VOA: special.2011.04.06

One effect of this lack of oxygen to the brain is a headache.

VOA: special.2009.07.14

The loss of one oxygen tank should not have been a major problem.

VOA: special.2009.07.22

"Until he saw me walking around with a can of liquid oxygen.

VOA: special.2010.06.23

These problems were more common among males, those with injured nerve tissue in the brain and those who had been given oxygen supplies for days as a baby.

VOA: special.2010.11.30

It results from a lack of oxygen to the brain.

VOA: special.2009.07.14

"Our study showed for the first time a clear difference between oxygen and air in the treatment of acute cluster headache.

VOA: standard.2009.12.17

The Algenol bioreactors also produce oxygen as a byproduct and that can be fed into a power plant to burn coal more cleanly.

VOA: standard.2009.09.02

"This will wedge itself in so tightly and completely block the airway that within minutes, because of lack of oxygen, a child will die."

VOA: standard.2010.02.23

"Twenty percent of attacks were improved on placebo,which is air, and 78 percent of attacks were improved on oxygen, a clear difference in favor of oxygen,"

VOA: standard.2009.12.17

"He saw me walking around with a can of liquid oxygen.

VOA: standard.2010.06.21