@lmon
Your first pic :
''In the case of incompetent use of the equipment theoretically dedicated to such suicide, death may occur not because of the suffocation, which is the most common mechanism in such cases, but because of a pressure injury of the respiratory tract, resulting in rapid damage to the alveoli in the rupture mechanism, causing massive bleeding.''
Just use it right and you won't get barotrauma
Your second pic is from ''Suicidal asphyxiation by using helium – two case reports''
The document doesn't include info about barotrauma.
Cause of death :''As the cause of death was suspected to be rapid asphyxiation due to a deficiency of oxygen in the breathing mixture, a medico-legal autopsy and toxicological tests were suggested''
Weird looking : ''The integuments of the body were brown-greenish in colour, with visible blackish marbling, epidermal blisters filled with brown putrefaction fluid and foci of epidermal necrolysis. The abdomen was slightly bloated due to the accumulation of putrefaction gases, and rigor mortis was absent in all muscle groups. Taking into account ambient temperatures at the time, it was established that death could have occurred around a week earlier''
Damn,there are so many helium reports and kinda a few nitrogen.
I assume it is so cause helium method doesn't require regulator?