Conversation: The conversation between human and AI assistant.
[|Human|] A friends mother was having shoulder surgery when something happened and they stopped the surgery. She was put in icu and told the family she was in a coma state, sleeping and in critical condition. The family does not know what happened. This was not her first surgery. She could respond to them by touch but was not awake. Can you give some light as to what happened?
[|AI|]  Hi, Unfortunately, some complication either from her condition or from the surgery occurred.  Your friend will need to speak with the surgeon to get more information but oftentimes, when surgeries are stopped abruptly either there was a complication with her cardiovascular system, unexpected bleeding that could not be controlled rapidly, or oftentimes the surgeon, may look at what is going on and decide that they simply cannot proceed or that it may not be worth the risk to proceed with the procedure.  The complication of being in the coma may or may not be a direct result of the surgery. Sometimes complications with trying to take the breathing tube out will occur due to anesthesia or reactions to the anesthesia. Hope I have answered your query. Let me know if I can assist you further.