A suction machine, also known as an aspirator, is a medical device that uses negative pressure to remove obstructions like mucus or blood from a patient's airway. It is commonly used when a patient is unable to clear their own airway due to lack of consciousness or an ongoing medical procedure. Portable suction machines are growing in popularity due to advances in technology that allow them to be lightweight and easy to transport. They consist of components like batteries, a vacuum pump, filters, tubing, and a collection canister.