What is the specific purpose for an Emergency Suctioning in Emergency Room?

People don't write about it because there isn't much to write about. It's perfectly sensible and practical. All you have to do is try a couple of intubations of airways full of lunch and you'll quickly learn the Yankeur is your friend. There's something to the saying that the most common reason for a failure to intubate is lack of preparation. When there's liquid or semi-liquid stuff in the way of what you're trying to do, you'll naturally suck it out of the way.