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Home Helium 8-year-old girl dies after inhaling helium from a balloon. Inhaling helium from a balloon can kill you. Squeaky voices are funny to a 5-year-old. So are weirdly shaped rocks. And annoying cartoons. During the exchange of gases in the normal breathing process, the blood stream absorbs oxygen from air in the lungs, while carbon dioxide passes from the blood to the air. This process does not stop instantly, however. Some time will pass before you start to experience serious physical distress.
For example, you would likely have time to pick up and put down an object, walk across a room, or find a chair and sit down before feeling compelled to breathe again. However, when the lungs are filled with helium, a different process takes over. Oxygen is actually removed from the blood stream during the exchange of gases. Depending on how completely oxygen is replaced by helium, you may lose consciousness quickly and without warning—you may literally pass out while still standing.
The usual result is an uncontrolled fall that can cause serious injury, even if normal breathing resumes. Helium balloon-filling systems have become popular in recent years, and are frequently found in supermarkets, party supply stores, and variety stores. Sometimes the system is loaned or leased to the customer—a practice that led to the fatality mentioned earlier.
A typical commercial system consists of a helium cylinder, shut-off valve, pressure flow regulator, and tilt valve with balloon adapter. Such a system is designed to fill balloons rapidly. Typically, it delivers a maximum helium gas flow rate of approximately five cubic feet per minute cfm. Attempting to inhale helium from a commercial helium balloon filling system poses a greater hazard than does inhaling helium from a balloon.
Beyond the risk of passing out, the potential for fatal injury is present. Unfortunately, several young people have been killed while inhaling helium from such a system. How can a healthy young person be killed by a seemingly harmless substance, you ask? Postmortem examinations of victims explain what occurs, while engineering analysis explains how.
Chemical reaction does not cause fatal injuries. Rather, the pressure of gas inside the lungs is the agent that can kill instantly. Autopsies show that the alveoli air sacs in the lungs have been ruptured.
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