Man, you guys are spot on! Yep, you can just call the medic, and her healing works JUST like Cure Light Wounds!
Except... not.
With a first aid kit - the sort that everyone carries - you can revive an unconscious character, stabalize a dying character, or attempt to stop bleeding.
I consider everyone to have at least basic first aid training (an equivalent to a rank in the treat injury skill).
With a medical kit - the sort carried by Johannsen - a portion of hit points can be restored. This can be done once per day.
A character can also be given long term care, which allows hit points to return at three times normal speed, but this requires no activity but rest.
Oh, by the way, Vanadia - Blake can't bleed out, you are right. Nothing says she can't bleed IN - i.e. internal bleeding due to, say, a ruptured spleen or other hidden damage.
But yes, she looks okay for the time being. Hatherford's damage is burn-based; that thing was packing a special sort of laser cannon, as well as a concussion rilfe.
Both rangers are in fairly bad shape... if I had to guess, I'd say that Hatherford is the closest to buying the farm, with Blake and Johannsen right behind, in that order. However, all are still capable of action.
Death right around the corner? Well, yes. It could be. I don't see this as a campaign, just a one off adventure. I make no claims that any of you will survive.