Didn't the Bruins let Bergeron play with crippling injuries? Would you classify that as "irresponsible"?
I'm assuming you're talking about Games 4, 5, 6 of 2013...and I sort of see your point there. For reference for those who might not remember the whole story:
http://espn.go.com/boston/nhl/story...multiple-injuries-suffered-stanley-cup-finals
Here's a brief rundown from the article:
Game 4, rib cartilage tear. Game 5, rib fracture - sent to hospital to make sure it wasn't a splenic rupture. It wasn't. Nerve block and x-rays before and during (!) Game 6. During game 6, he separated his shoulder and punctured his lung. Hospital after the game again for a 3 day hospitalization, presumably placed a chest tube in him.
Yeah, he probably shouldn't have played after game 5. Rib fracture, depending on location and severity, is a very real risk factor for a collapsed lung. A collapsed lung invariably leads to chest tubes and hospitalization (which it did, in this case), and chest tubes can very easily lead to more nasty complications like infections (which I'm pretty sure it didn't, in this case). So, playing with a rib fracture in game 6 wasn't the smartest idea.
That said, a collapsed lung isn't exactly a tough thing to diagnose - especially when you're taking x-rays anyway due to giving an intercostal nerve block. (And, a nerve block is also a risk for a collapsed lung - those needles can pierce the lung!) It's not uncommon for a collapsed lung to take hours to develop, both clinically (shortness of breath) and on the x-ray.
There are two huge differences between this and Toews' case, though.
1) Head injuries literally hit you in your judgment center. You will swear up and down you're fine, even after seeing video replays of what happened. That's why you need someone ELSE to step in and say "No, you're not playing." In theory, Patrice understood what he had, and understood the risks and benefits. Anything involving the head and neck, you can't guarantee that level of consent.
2) While a collapsed lung can certainly have the potential to develop quickly into a life threatening situation, more often than not, if it's caught early enough under medical supervision, it's reversible with absolutely no long term effects. With post concussion syndrome, quite frankly, there's little known - but what is known isn't good.
All that said, I certainly hope Toews is okay. A complete recovery is what everyone wants - and if it turns out to be not as bad as it looked (which is possible), then a speedy one would be icing on the cake.