In clinical practice, respiratory paralysis is mainly caused by motor neuron or respiratory muscle diseases that result in impaired movement of the respiratory muscles, including the diaphragm and intercostal muscles, with severe restriction of movement, affecting pulmonary ventilation and air exchange, and a decrease in lung function. Hypoxemia, with or without hypercapnia, may occur and cause respiratory failure. This is when the respiratory muscles and nerves do not work properly and are not able to perform normal respiratory movements. The more common clinical conditions such as myasthenia gravis and severe hypokalemia may lead to respiratory muscle paralysis.