This scene depicts a miscalculation. The miscalculation could represent the patient's poor judgement which led him to the hospital (yes, that hospital looks like a terrible place)- or, the miscalculation could have been on part of the doctors that failed to keep him alive; or botched a surgery.
I think that one white rectangular thing is a medical chart of some kind, and the other black rectangle is a two-way mirror. Light on the ceiling. Gas tank at head of table. Oh, and there's another figure peaking through the curtain on the left.