Innovative integration of lung ultrasound and wearable monitoring for predicting pulmonary complications in colorectal surgery: A prospective study

Table 1 Grading of postoperative pulmonary complications

Grading of postoperative pulmonary complications
Grade 1	Cough, dry Microatelectasis: Abnormal lung imaging and temperature > 37.5 ℃ without other documented cause Dyspnea
Grade 2	Cough, productive
	Bronchospasm
	Hypoxemia
	Atelectasis
	Hypercarbia: Requiring treatment, such as naloxone or increased manual or mechanical ventilation
Grade 3	Pleural effusion, resulting in thoracentesis
	Pneumonia, suspected: Radiologic evidence without microbiological evidence
	Pneumonia, proved
	Pneumothorax
	Reintubation postoperatively, period of ventilator dependence does not exceed 48 hours
Grade 4	Ventilatory failure: Period of ventilator dependence exceeding 48 hours