Can you suction mucus out of lungs?

Excuse me, I was wondering if you could clarify something for me. I've heard that there are procedures to help clear mucus from the lungs, but I'm not entirely sure how they work. Specifically, I'm curious about whether it's possible to suction mucus out of the lungs. Could you elaborate on this process and explain how it's done, if it's indeed feasible? I'd appreciate any information you could provide.