Diaphragmatic paralysis is a paralytic rise of the diaphragm on one side or both sides with impaired movement due to damage to the phrenic nerve and blockage of nerve impulses. It has a wide range of causes, most commonly caused by the lymph nodes of lung cancer metastasized to mediastinum compressing or invading the phrenic nerve. What are the examination items of diaphragmatic paralysis? Laboratory examination: Infectious diseases or inflammatory diseases, white blood cells are normal or elevated. 2.X-ray chest fluoroscopy shows unilateral diaphragm paralysis and elevation, the activity is weakened or disappeared, the healthy side of the diaphragm falls while the affected side of the diaphragm rises in inhalation, and this phenomenon is more obvious when inhaling the nose hard. The mediastinum may oscillate during breathing, with the heart and mediastinum moving to the healthy side during inhalation and to the affected side during exhalation. 3.Phrenic nerve stimulation The phrenic nerve can be stimulated by non-invasive electric or magnetic wave at the posterior edge of the sternocleidomastoid muscle, which is 3-4 cm above the sternocleidomastoid joint in the neck, and the phrenic nerve can also be stimulated by magnetic wave near the spinous process of the cervical vertebrae in the neck 7. Synchronized recording of evoked action potentials and phrenic nerve conduction time at the 6th to 7th intercostal space of the rib margin on the body surface; and measurement of evoked transdiaphragmatic muscle pressure by esophageal-gastric cystic tube method can confirm the diagnosis of diaphragmatic paralysis, and also determine whether it is a complete or incomplete paralysis.