The strict letter of the rules normally says you have to phone in sick every day.
However I would expect any normal company, having seen an employee carted off unconcious in an ambulance, to waive this. FFS she could have been dead! Or undergoing major surgery. Or still unconcious.
Lunatic behaviour.
They should have phoned and said, hope you're OK, when you are out of hosptial please can you call us for an update.
Plus if she's in hospital how's she supposed to call in? You're not allowed to use your mobile and if you didn't have the right change/any money then you wouldn't be able to make any calls.
Madness.