Suggestion

[Broly]

However, it cannot heal Serious or Major injuries like shattered bones and severed limbs.

I'd assume this part also applies to Warren's current condition.

It cannot. However, in a personal storyline you're free to make use of medical facilities that might exist wherever you are. That can be a full blown bacta tank to heal you in a few hours or just a hospital bed with an IV drip of pain killers. It's up to you and your imagination. The strict rules only exist for healing in official fights and events where damage is actually calculated.