Arterial partial pressure of oxygen (PaO2)

The partial pressure of oxygen is the pressure generated by oxygen molecules dissolved in the blood. The partial pressure of oxygen is related to the use of oxygen by cells. Reduce the lower than the normal range of the same age, called hypoxemia. The partial pressure of oxygen in the blood is less than 8.0 kPa, which can be diagnosed as respiratory failure. 6.67 ~ 8.0kPa for mild respiratory failure, 5.33 ~ 6.67kPa for moderate respiratory failure, <5.33kPa for severe respiratory failure. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: not fasting Tips: Flush with heparin beforehand in the syringe. Normal value 12.6 ~ 13.3 kPa (95 ~ 100mmHg). Clinical significance As an indicator of hypoxia. Those who reduce or fall below the lower limit of the normal range of their peers are called hypoxemia. The partial pressure of oxygen in the blood is less than 8.0 kPa, which can be diagnosed as respiratory failure. 6.67 ~ 8.0kPa for mild respiratory failure, 5.33 ~ 6.67kPa for moderate respiratory failure, <5.33kPa for severe respiratory failure. Low results may be diseases: phosgene poisoning, plateau insufficiency, constitutional hypotension, acute respiratory distress syndrome in the elderly, pneumothorax considerations Pay attention to the difference in blood oxygen partial pressure measured at the geographical location. 1. Conventional 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. 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 the specimen in time. 5. Some drugs may affect the pH of the blood, and the doctor should be informed of the recent medication before the test. Inspection process Same electrode assay. Not suitable for the crowd Those without examination indications should not be tested. Adverse reactions and risks It is difficult to cooperate with serious illness.