Select 50 non-severe ischemic SAP patients with swallowing difficulties in our intensive care unit and randomly divide them into two group.The control group was given conventional anti-infective drugs, expectorants, and suctioning with a suction tube. The treatment group was treated with fiberoptic bronchoscopy suction and bronchoalveolar lavage, while the drug treatment was the same as the control group. Compare heart rate, respiration, blood pressure, blood oxygen saturation, arterial blood gas analysis, procalcitonin, interleukin-32, lung function, C-reactive protein, clinical pulmonary infection score (CPIS), swallowing difficulty assessment scale, and adverse reactions between two groups.