During a discussion regarding strangles in police work, the subject of deaths in judo due to strangles, in Japan came up. Rather than drifting the thread, I am starting one here. Here's a few links I found. As best as I can tell, it looks like most deaths are due to head injuries from improper falls.
http://www.nytimes.com/2013/04/18/sp...judo.html?_r=0
http://judojiko.net/eng/
There are typical conditions causing accidents in judo, many of which apply in this incident. The victim:
1. was a beginner with one and a half months of judo experience
2. had a headache before the accident
3. was injured as a result of osotogari
4. was paired with a taller and heavier senior student
5. developed acute subdural hematoma
A - warning issued by the All Japan Judo Federation (AJJF) on the first page of Safe Instruction of Judo (Ver 3 2011) states that The amount of accidents of young beginners who injure their head or neck is substantial.
Note on this page - http://judojiko.net/eng/news/280.html -that of 24 accidents, ALL were from throws.
ON this page, there is a discussion of deaths due to heat stroke - http://judojiko.net/eng/news/303.html
So, I googled "deaths in judo from strangles"
1. Wikipedia has a good piece on chokeholds and mentions its use in law enforcement, contrasting vascular from airway choke - https://en.wikipedia.org/wiki/Chokehold - which highlights proper training in my view. One incident resulting in death from a taser occurred because the individual was on a ledge, was tazed and fell to his death. To state the obvious, Tasers don't need to be banned due to this.
From Sudden Death in Custody - https://books.google.com/books?id=BF...angles&f=false
This is an interesting summary, pointing out two potential causes of death: bradycardia and arrhythmia based on carotid sinus stimulation, and the other is positional asphyxia. http://www.aikiweb.com/techniques/gunther1.html I will note that there has been a lot of research on the latter, (there is an appendix by Dr. Gary Vilke on this subject in my books for law enforcement, EMS and corrections which discusses this issue - http://edgeworkbooks.com/books-on-de-escalation/).
Ellis Amdur