Most of the elderly will have a history of chronic respiratory and cardiovascular diseases, in the clinical more common are chronic bronchitis, pulmonary heart disease, hypertensive heart disease, these diseases if not actively control will become more and more serious will cause lung failure. Lung is the main respiratory organ, if caused by lung failure will affect the lung ventilation function, cause lung ventilation dysfunction, easy to appear breathing faster, chest tightness, shortness of breath, and even dyspnea. The more serious symptoms will also cause tidal breathing or sigh-like breathing, and will easily cause cyanosis of the lips and mouth, and the mental state will be abnormal, there will be drowsiness, lethargy, or even cause coma, and there will be cardiac arrhythmia, palpitations, as it will also affect the liver and kidney function and digestive system, easily cause nausea, vomiting, electrolyte disorders, and also cause edema, anuria, oliguria, and so on.