breathing with camara down throat

If you're wondering about an endoscopy, it's not really a camera, it's a very thin tube with a camera lens at the end. Breathing can still go on as the tube goes down your esophagus and you breathe from your nose/mouth down your trachea--a different tube.
 
Yes, I had the in -office one done to me today, he sprayed nurabing medication into my nose and it went through my nose and down my throat, after about 5 minutes to get it nurab he put a thin tube up through my nose and into my throat. He looked around in my throat and then he slowly brought it back up. It only hurt because my sinuses were swollen and he was having to fit the tube through there, I could barely feel it in my throat and breathing was normal.
 
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