Conversation: The conversation between human and AI assistant.
[|Human|] I just went thru surgery for knee replacement and my understanding was I stopped breathing - I remember there was something my throat -finally came thru but whatever medicine they gave me made me sort of crazy and they put me on the crazy floor! they said I could norelease the carbon dioxcine(SP) I am COPD?
[|AI|]  Thanks for your question on Chat Doctor. In my opinion you had intubation with endotracheal tube for general anesthesia during surgery. So the thing you felt in throat must be endotracheal tube. And COPD patients tend to show retention of carbon dioxide (CO2 narcosis) during general anesthesia as they can not exhale it. So increased CO2 in the body can depress central nervous system. This high CO2 along with general anesthesia lead to stoppage of breathing.