Oxygen partial pressure
Blood oxygen partial pressure refers to the tension of physically dissolved oxygen in plasma, which reflects the degree of hypoxia in the body. At one atmosphere, 100 ml of oxygen dissolved physically in the body is only 0.3 ml in the blood, so the oxygen requirement in the body mainly comes from the oxygen binding of hemoglobin. The arterial partial pressure of oxygen (PaO2) is approximately 13.3 kPa (100 mmHg), depending on the oxygen partial pressure of the inhaled gas and the respiratory function of the lung. The venous oxygen partial pressure (PvO2) is normally about 5.32 kPa (40 mmHg), which reflects the internal breathing. Specimens were taken from arterial blood.Basic Information
Specialist classification: Respiratory examination classification: pulmonary function test
Applicable gender: whether men and women apply fasting: not fastingAnalysis results:
Found in various lung diseases (such as asthmatic bronchospasm, pneumonia, respiratory distress syndrome, pulmonary edema), left ventricular failure and so on.
After hypoxia (such as metabolic acidosis, hyperventilation syndrome).
1, children, adults 10.6 ~ 13.3kPa.
2, the newborn 8.0 ~ 12.0kPa.Clinical significance
1. Reduce the incidence of various lung diseases (such as asthmatic bronchospasm, pneumonia, respiratory distress syndrome, pulmonary edema), left ventricular failure and so on.
2, after increased hypoxia (such as metabolic acidosis, hyperventilation syndrome).Low results may be diseases: neonatal lung air leak, congenital pulmonary cyst in children, congenital chest and abdomen hiatal hernia, pediatric heart failure, neonatal shock, neonatal asphyxia, chronic respiratory failure, gas poisoning precautions
(1) Before the blood is drawn, it is necessary to indicate whether or not to take oxygen. The blood sample should be isolated from the outside air and sent to the test in time. Arterial blood gas analysis of blood collection sites, generally the radial artery, radial artery, femoral artery and so on. If venous blood is required, the forearm should be placed in warm water at 45 ° C for 20 min to make the venous blood arterial. It is not advisable to use a tourniquet when drawing blood.
(2) The use of certain drugs can increase or decrease the pH of the blood, such as the use of sodium bicarbonate, ethenic acid, sodium glutamate, phenylbutazone, aspirin, etc. to increase blood pH; use tetracycline, isoniazid Bismuth, phenformin, ammonium chloride can reduce blood pH.Inspection process
Same electrode assay.Not suitable for the crowd
Generally there are no special taboos.Adverse reactions and risks
1, may cause certain damage to the blood vessels.
2, blood draw has the risk of infection.