30分钟膈肌变异率联合肺部超声评分对COPD合并重症肺炎患者撤机可信性的研究

Objective To observe the credibility of 30-minute diaphragm variation rate combined with pulmonary ultrasound score in patients with Chronic Obstructive Pulmonary Disease(COPD) and severe pneumonia. Methods Sixtysix patients diagnosed with COPD combined with severe pneumonia and admitted to the intensive care unit of our hospital from September 2025 to July 2026 were selected. All the selected patients required invasive mechanical ventilation. The patients were grouped based on the outcome of weaning. The successful group(20 cases) and the failed group(46 cases) were formed. The data of various aspects of the two groups of patients as well as the 30-minute diaphragm variation rate and lung ultrasound score were compared. Results The 30-minute diaphragm variation rate and lung ultrasound score of the successful group showed significant differences compared with the failed group(P<0.05). The blood gas levels of the successful group and the failed group also showed significant differences(P<0.05). The levels of inflammatory factors of the successful group and the failed group also showed significant differences(P<0.05). Conclusion the 30-minute diaphragm variation rate combined with pulmonary ultrasound score in prediction in COPD patients with severe pneumonia can improve the accuracy of prediction and the success rate of weaning.