Inhaling Helium (balloons)

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I have noticed that there are is a huge number of people doing google searches on this topic and coming to this blog to read up on it. I have an entry back on June 10 that goes into detail over this. Inhaling small quantities is probably okay, but if you do it to an extreme it may be very dangerous. Here is an update. For more information, click on the June 10 link above. When we were selling at the Hercules Cultural Festival, there was a man located across from us filling up balloons with helium and I saw dozens upon dozens of kids opening up the balloons and inhaling the helium and having fun talking like Donald Duck. And they kept on going back for more. I recalled that I read something about this being dangerous and did some research. I know that this is a lot of fun for the kids and we adults did it when we were younger also.

Although the vocal effect of inhaling helium may be amusing, it can be dangerous if done to excess. The reason is not due to toxicity or any property of helium but simply due to it displacing oxygen needed for normal respiration. One must be aware that in mammals (with the notable exception of seals) the breathing reflex is not triggered by insufficient oxygen but rather excess of carbon dioxide. Unconsciousness, brain damage in and even asphyxiation followed by death may result in extreme cases. Also, if helium is inhaled directly from pressurized cylinders the high flow rate can fatally rupture lung tissue.Neutral helium at standard conditions is non-toxic, plays no biological role and is found in trace amounts in human blood. At high pressures, a mixture of helium and oxygen can lead to high pressure nervous syndrome; a small proportion of nitrogen can alleviate the problem

So, if you don't believe me, then go ASK ALICE.