For some patients with ICU-acquired weakness, the inspiratory muscles should be trained, using a respiratory trainer with an initial load of 30% of the maximal inspiratory pressure, 5 inspirations per group, with an interval of not less than 6 seconds between each inspiration, and 6 groups should be done for each training session, with a 1-minute rest between groups, and with a frequency of 1 time per day. For patients with sputum retention and difficulty in expectoration, patients were encouraged to use postural drainage for expectoration first, and it was recommended to perform postural drainage for the affected lung lobe, so that the patient could maintain the lateral position with the healthy lung underneath. If the effect of postural drainage is not good or the patient has difficulty in coughing up sputum, active cyclic respiratory technique can be applied. Firstly, the patient is instructed to perform abdominal breathing in a calm state, inhale through the nose and exhale through the mouth, and this stage can be repeated several times in order to achieve a stable state of respiration. Then ask the patient to inhale, hold the breath for three seconds, inhale again, hold the breath for three seconds, until reaching the maximum inspiratory volume, and then exhale through the mouth, this stage can be done 2-3 times, and finally ask the patient to expel sputum by exhaling 1-2 times, and pay attention to the fact that the patient should not use the mouthpiece for blocking when exhaling, so as to minimize the spraying out of the droplets, such as sputum expectoration process discomfort, should be stopped and take a rest, and if there is no relief of the symptom after resting, please consult a doctor in a timely manner. Source: Dr. Yurai