A 75 year old man was hospitalized in the intensive care rehabilitation department of a tertiary hospital in Heilongjiang Province due to paralysis caused by a car accident. He was conscious but had no cough ability. He usually had the same amount of sputum, but his lung function declined and his lungs were atelectasis due to long-term bed rest. After using runkai medical noninvasive expectoration machine, the patient adapted well, the first cycle was completed, and a large amount of sputum was aspirated; Another 2-3 cycles were performed to help the patient expand the lung and exercise the patient's lung function. The feedback effect is obvious, and it also helps medical staff save a lot of work.