I was also thinking more along the lines that he some Hanso family memeber.
I went back and rewatched the episode and if you'll notice that the monitor that Micheal is hooked up to shows the words "No Alarms are set" something like that, and then when he looks over at the old man in the other bed it looks like he has a tube into his mouth not a breathing mask over his mouth then comes Libby in.
When Micheal is awaken he looks at his monitor is not the same and looks over at the older man, then that woman doctor/nurse came in and says it couldn't of been the other man who had screem who looks to be in a coma.
Maybe we can get some side by side screencap of these scenes.
I'm gonna bet that if the old man is a part of the story he's a Hanso.
Oh wasn't Locke's father killed on the island by Sawyer cause Locke couldn't kill him, and got Sawyer to do it cause Locke knew his father had done something or another to Sawyer and Locke knew Sawyer would be angry enough to kill him.

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Standing in the ocean with the sun burning low in the west
Like a fire in the cavernous darkness at the heart of the beast
With my beliefs and possessions, stopped at the frontier in my chest
At the edge of my country, my back to the sea, looking east