For some patients with acquired weakness in the ICU, the inspiratory muscles should be trained, using a respiratory trainer with an initial load of 30% of the maximum inspiratory pressure, 5 inspirations per group, with an interval of not less than 6 seconds between each inspiration, doing 6 groups per training, with a 1-minute rest between groups, and a frequency of once a day. For patients with sputum retention and difficulty in sputum evacuation, patients were encouraged to use postural drainage first. It was recommended to perform postural drainage for the involved lobe of the lung, keeping the patient in a lateral position with the healthy side of the lung underneath. If postural drainage is not effective or if patients have difficulty coughing up sputum, active circulatory breathing techniques can be applied. First, the patient is instructed to breathe abdominally in a calm state, with nasal inhalation and oral exhalation, and this phase can be repeated several times to achieve a stable state of breathing. Then ask the patient to inhale, hold the breath for three seconds, inhale again, hold the breath again for three seconds until the maximum inhalation is reached, and then exhale through the mouth, and this stage can be done 2-3 times, and finally ask the patient to breathe 1-2 times for sputum excretion, and pay attention to avoid using the mouthpiece for spacing when breathing to reduce the spray of droplets, and stop and rest if discomfort occurs during the process of sputum excretion, and if the symptoms are not relieved after resting, please seek medical attention in time. Content source: Dr. You Lai