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States Turn To an Unproven Method of Execution: Nitrogen Gas (nytimes.com)
States are reportedly turning to nitrogen gas to carry out the death penalty. "Oklahoma, Alabama and Mississippi have authorized nitrogen for executions and are developing protocols to use it, which represents a leap into the unknown," reports The New York Times. "There is no scientific data on executing people with nitrogen, leading some experts to question whether states, in trying to solve old problems, may create new ones." Slashdot reader schwit1 shares an excerpt from a report via The New York Times: What little is known about human death by nitrogen comes from industrial and medical accidents and its use in suicide. In accidents, when people have been exposed to high levels of nitrogen and little air in an enclosed space, they have died quickly. In some cases co-workers who rushed in to rescue them also collapsed and died. Nitrogen itself is not poisonous, but someone who inhales it, with no air, will pass out quickly, probably in less than a minute, and die soon after -- from lack of oxygen. The same is true of other physiologically inert gases, including helium and argon, which kill only by replacing oxygen.
Death from nitrogen is thought to be painless. It should prevent the condition that causes feelings of suffocation: the buildup of carbon dioxide from not being able to exhale. Humans are highly sensitive to carbon dioxide -- too much brings on the panicky feeling of not being able to breathe. Somewhat surprisingly, the lack of oxygen doesn't trigger that same reflex. Someone breathing pure nitrogen can still exhale carbon dioxide and therefore should not have the sensation of smothering.
Death from nitrogen is thought to be painless. It should prevent the condition that causes feelings of suffocation: the buildup of carbon dioxide from not being able to exhale. Humans are highly sensitive to carbon dioxide -- too much brings on the panicky feeling of not being able to breathe. Somewhat surprisingly, the lack of oxygen doesn't trigger that same reflex. Someone breathing pure nitrogen can still exhale carbon dioxide and therefore should not have the sensation of smothering.
Not a fan of the death penalty but if you're going to check-out, be it by choice or inflicted then this is one of the nicest ways to go (& cheap/simple). Light headed & pass out. Helium balloons work too but you need a mask to keep the thing in place.
What's good for CO2 scrubbing? A simple balloon rebreather & CO2 absorber should do the job if a bit slower while the O2 converts. I guess I'm coming at this problem from the euthanasia angle rather than the "kill our citizens" one... Not speaking from experience realise... ;) [well I think we've all gone light-headed with the Helium thing]
used helium gas to assist his patients who wanted to commit suicide. I believe it is still used by organizations such as Dignitas for the same purpose.