I had respiratory failure (cyanosis) during general anaesthetic.the doctor thinks it was anaphylaxis. i am now diagnosed with both copd stage 2 and asthma.were these conditions the more likely cause?

COPD is deadly: Anaphylaxis can happen with any drug, but acute postoperative respiratory failure is more commonly caused by underlying lung disease. Stopping smoking several weeks before surgery decreases risk for complications. Of course, the best thing anyone can do for better health is to stop smoking, especially those with lung disease. Smoking with lung disease is like rubbing dirt into a wound. Stop ASAP.

Respiratory failure: Cyanosis is a possible symptom of respiratory failure (RF). RF is a generalized term which indicates inadequate oxygenation and/or inadequate respiratory effort. Yes, the pre-surgical COPD and asthma were almost certainly the source of your problem. I won't mince words. Your smoking is the root cause of the event. Stop smoking or pick out a tombstone.