Conversation: The conversation between human and AI assistant.
[|Human|] My dad has just had bronchoscopy and although he is awaiting his results he is coughing up black bits in his phlegm....Is this as a result of the bronchoscopy, dried blood etc or something more serious. Its not all the time only when he coughs heavily. Some times its black specks or grey cloudy phlegm.
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. These black, Grey phlegm is nothing but clotted blood particles. Bronchoscopy is an invasive procedure. It can because iatrogenic (procedure related) damage to airways. This damage can bleed. No need to worry about such bleed as they are self limiting and self-healing. So nothing should be done for this black phlegm. Hope I have solved your query. I will be happy to help you further. Wishing good health to your father. Thanks.