Blood oxygen saturation (SaO2)

Refers to the percentage of hemoglobin that is saturated with oxygen, that is, the ratio of the oxygen content of hemoglobin to the amount of oxygen bound multiplied by 100. It is a biological oxidation process, and the oxygen required in the metabolism process enters human blood through the respiratory system, and combines with hemoglobin (Hb) in blood red blood cells to form oxyhemoglobin (HbO2), which is then transported to various tissues of the human body. go with. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: routine arterial blood should be taken for examination. If venous blood is to be taken, the forearm should be immersed in warm water at 45 °C for 20 minutes to make the venous blood arterial. It is not advisable to use a tourniquet when drawing blood. Normal value 95% to 99%. Clinical significance Increased seen in hyperbaric oxygen therapy. Reduce the incidence of hypoxic lung disease such as emphysema, circulatory hypoxia, tissue hypoxia. Low results may be diseases: left ventricular dysplasia, atrial reentry tachycardia, idiopathic ventricular tachycardia 1. Conventional arterial blood should be taken for examination. If venous blood is to be taken, the forearm should be immersed in 45 °C warm water for 20 minutes to make the venous blood arterial. It is not advisable to use a tourniquet when drawing blood. 2. Flush with heparin beforehand in the syringe. 3. Ensure that the needle and needle of the syringe are tightly combined, and there must be no air leakage to ensure that the blood sample does not come into contact with the outside air. 4. Send samples in time. 5, certain drugs can affect the pH of the blood, the doctor should be informed of the recent medication before the test. Inspection process Subjects were venously collected and assayed in time for serum separation. Same as oxygen electrode assay. Not suitable for the crowd 1. Patients who have taken contraceptives, thyroid hormones, steroid hormones, etc., may affect the results of the examination and prohibit patients who have recently taken the drug history. 2, special diseases: patients with hematopoietic function to reduce disease, such as leukemia, various anemia, myelodysplastic syndrome, etc., unless the examination is essential, try to draw less blood. Adverse reactions and risks 1, subcutaneous hemorrhage: due to pressing time less than 5 minutes or blood draw technology is not enough, etc. can cause subcutaneous bleeding. 2, discomfort: the puncture site may appear pain, swelling, tenderness, subcutaneous ecchymosis visible to the naked eye. 3, dizzy or fainting: in the blood draw, due to emotional overstress, fear, reflex caused by vagus nerve excitement, blood pressure decreased, etc. caused by insufficient blood supply to the brain caused by fainting or dizziness. 4. Risk of infection: If you use an unclean needle, you may be at risk of infection.