1, medical gas dew point sensor accuracy drift should be less than 1 ℃ / Year. When the concentration of carbon monoxide sensors 10 × 10 -6 th, the error should not exceed 2 × 10 -6 th .2, air pressure sensor alarm should be installed in the use of total pipeline valves side. 3. Regional alarm sensor should be set repair valves, regional alarm sensor should not use electrical contacts. In addition to the operating room, anesthesia outdoor oxygen plant, regional alarm sensor should be set using the valve in the pipeline region side. (2) oxygen mask method: can be divided into open and closed mask method. Open the mask is placed in the nose and mouth from the patient 1-3 cm, suitable for children, may have no discomfort. Airtight mask method is to close the cover on the snout mask with elastic band fixed, suitable for the more severe hypoxia by price-cost medical oxygen, the oxygen concentration of up to 40% to 50% of the supply of high-quality oxygen equipment, they feel more comfortable No irritation and blow dry feeling. But oxygen consumption is large, the presence of eating and expectoration inconvenient shortcomings. (3) through the endotracheal tube oxygen therapy: a thin catheter is inserted through the nose SPA molecular sieve oxygen concentrator oxygen method intratracheal, also known as tracheal oxygen therapy. Suitable mainly with chronic obstructive pulmonary disease and pulmonary fibrosis and other chronic respiratory failure due to need long-term oxygen and oxygen effects were generally poor, since the catheter directly into the trachea oxygen, it can significantly improve the efficacy, only relatively low-flow oxygen can achieve higher results, and oxygen consumption is small. SPA molecular sieve oxygen machine | Hebei Ericsson (certified) | oxygen provided by the Hebei Medical Engineering Co., Ericsson. Ericsson Hebei Medical Engineering Co., Ltd. (www.hslixin.com) Hebei Hengshui, a leader in medical device manufacturing equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Hebei Ericsson leadership with the staff warmly welcome all inquiries negotiations to create a better future Hebei Ericsson.