The last paragraph seems to suggest that this isn't actually the first time that people have been put into "suspended animation" via extreme cold, rather it is the first time it was done in an emergency setting.
I am not a doctor and I'm relating this incident third hand, but as explained to me it went like this: A person at our church had a heart attack and essentially died, they were then put into a deep chill / ice bath, then transported to the hospital. At the hospital they received a multiple bypass operation and then were brought up to temperature and out of their induced coma. They recovered and have suffered no ill effects (other than they would because their arteries were clogged). I got the impression that this chilling/induced coma kind of thing was 'new' but no longer experimental.
The biggest takeaway for me was to learn CPR and PRACTICE it every year (through re-certification). My father-in-law went without CPR for ~9 minutes- basically pegging his chance at survival to 0. Who knows what the outcome would've been if someone who knew CPR was present to start immediately.
Seriously, get certified and practice CPR techniques. It could save a life one day.
> One complication of the procedure is that patients’ cells can become damaged as they are warmed up after surgery.
Just like holding temperatures in food industry health codes: really cold is okay, and really hot is okay, but you really want to minimise the time spent between extremes. Makes me wonder how fast the brain is deteriorating at 10C, and if there are significantly more problems holding a body for 10 hours as opposed to 10 minutes. For all I know, most of the damage done by this procedure could be in the cooldown and warmup processes (though I'm not making a positive claim).