When they'd entered, Jayne set his sights immediately on the doctor, but people were moving quick enough to come help them. There were questions, mostly about their conditions and what had happened, and Jayne was content enough to surrender Spike to whoever wanted to take him and help him over to where they'd set up some sort of healing station.
Jayne himself was ushered to one of the couches, answering their questions even as they tended to his wound. He did glance over toward Spike a time or two, but his view was mostly blocked by the docs working in that area.
He did wonder, just a little, where the medical supplies had come from, because there definitely hadn't been injectible pain killers last he'd seen. He, however, was content enough to just let them work. He did give them the short version of the events outside, as he recalled them. Granted, a lot of it was a blur but ... the idea was there. Him, Spike, and three reavers. They survived, the reavers didn't. End of story.