Stygmata wroteCheck any diving institution ..
I think there is a recompression chamber for military divers, not sure where. Ask a diver :) I knew that from hanging out with a relative who is a dive instructor. But well I'm not sure if that is what you are asking for, or bad equipment.
But that's all that comes to mind when you mention oxygen chamber.
I am talking about recompression chamber which is probably not the same.