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消化道内镜检查也会发生严重的心肺合并症，国外一些研究认为其与检查时产生的低氧血症有关。低氧血症的发生率 研究表明，上消化道内镜检查时低氧血症的发生率较高，２０％～４５％为严重低氧血症者（ＯｘｙｇｅｎｓａｔｕｒａｔｉｏｎＳａＯ２＜９０％，Ｏｘｙｇｅｎｔｅ?
Gastrointestinal endoscopy will also have serious cardiopulmonary complications, some foreign studies that hypoxemia associated with the inspection. The incidence of hypoxemia studies have shown that the incidence of hypoxemia in upper gastrointestinal endoscopy is higher, 20% to 45% of patients with severe hypoxemia (OxygensaturationSaO2 <90%, Oxygente?