Sobbing aspiration after open heart surgery may be due to pneumothorax, emphysema and pulmonary edema. 1. Pneumothorax: Pneumothorax may be due to the gas entering into the pleural cavity after open heart surgery, resulting in the accumulation of gas in the state of pneumothorax, and the patient may experience symptoms such as chest tightness, shortness of breath, sobbing inhalation, and dyspnea. 2. Emphysema: Emphysema may be caused by lung injury and chest trauma after open heart surgery, and patients may experience shortness of breath during exercise, sob-like inhalation, dyspnea, weight loss and other symptoms. 3. Pulmonary edema: Pulmonary edema may be caused by infection in the lungs due to inadequate care after open-heart surgery, and patients may experience symptoms such as coughing, chest tightness, sob-like inhalation, and severe dyspnea. It is recommended that the patient go to the hospital in time for medical treatment and follow the doctor’s instructions for follow-up.