Paradoxical thoracoabdominal movement refers to the contradictory thoracoabdominal movement of emphysema patients, i.e. thoracic movement during inspiration (chest expansion exercise, which mainly exercises the chest muscles and also plays a stretching role toward) abdominal wall movement inward. So, how do we check out if there is a phenomenon of contradictory chest and abdominal movements? Here to introduce you. First of all, there are many ways to check for paradoxical chest and abdominal movements, but some people are different, so we suggest that patients should generally choose the most suitable examination method for themselves, so that we want to see. We can check by electrocardiogram, which is usually not abnormal, but sometimes there is a low voltage in the limb conduction. Secondly, we can also use X-rays, which are the most commonly used and most effective test in medicine. Likewise, there are patients who can use respiratory function tests, which are of great interest for the diagnosis of paradoxical movements of the chest and abdomen. Finally, there are other tests that can be used, including blood gas analysis and blood and sputum tests. These two methods are also more troublesome, but they can also detect paradoxical chest and abdominal movements, so we can choose the best and most applicable test through our doctor.