partial pressure of oxygen at half saturation

The partial pressure of partial oxygen partial pressure, also known as the oxygen partial pressure of hemoglobin 50% oxygen saturation, refers to the oxygen partial pressure at 50% oxygen saturation of hemoglobin, reflecting the oxygen transport capacity and the affinity of hemoglobin and oxygen. Basic Information Specialist classification: Respiratory examination classification: blood examination Applicable gender: whether men and women apply fasting: not fasting Tips: Some drugs can affect the pH of the blood. The doctor should inform the doctor about the recent medication before the test. Normal value Normally, when pH = 7.40 and PaCO2 = 5.33 kPa (40 mmHg), P50 was 3.54 kPa (26.6 mmHg). Clinical significance 1. Reduce the oxygen shift curve to the left, increase the affinity of oxygen and hemoglobin, easily combine oxygen, and not easily release oxygen, thus making the tissue hypoxic. 2, the oxygen shift curve is shifted to the right, the affinity between oxygen and hemoglobin is reduced, and oxygen is easily released. 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. Inspection process Same as oxygen electrode assay. Not suitable for the crowd Generally no taboos. Adverse reactions and risks Generally no complications and harm.

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