The diaphragm is a crucial muscle that separates the abdominal and thoracic cavities, forming the basis of respiratory mechanics and performing 60-80% of its function. The human body has two diaphragm lobes, one on the right and one on the left. Diaphragm paralysis is the loss of function of the diaphragm muscle resulting from damage to the phrenic nerve, to which it is connected. This condition typically occurs unilaterally. In unilateral paralysis, during breathing, the healthy diaphragm lobe performs its normal movement, while the paralyzed side remains immobile or exhibits paradoxical movement (e.g., moving upwards during inhalation). Diaphragm paralysis can lead to displacement of the heart and a reduction in lung volume during respiration.