Arterial oxygen content (CaO2)

Arterial blood oxygen content refers to the number of oxygen-containing moles per liter of arterial whole blood or the number of ml of oxygen per minute of arterial blood. It is the sum of the oxygen content in red blood cells and plasma, including the combined oxygen and physically dissolved oxygen in HbO2. Basic Information Specialist classification: cardiovascular examination classification: blood examination Applicable gender: whether men and women apply fasting: not fasting Tips: If you want to take venous blood, you must soak your forearm 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. Normal value The normal range is 8.55 to 9.45 mmol/dl (19 to 21 ml/dl). Clinical significance 1. Reduced in hypoxia. 2. Elevation is seen in the body's increased oxygen content. Low results may be diseases: acute respiratory distress syndrome in the elderly, arsenic poisoning precautions 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 as oxygen electrode assay. Not suitable for the crowd Those without examination indications should not be tested. Adverse reactions and risks Bleeding: After blood collection, use sterile cotton lump or other disinfecting hemostatic articles to tighten the needle to stop bleeding, especially for patients with coagulopathy should be given sufficient time to avoid bleeding.

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