Actual Bicarbonate (AB)

Actual bicarbonate refers to the actual content of bicarbonate in human plasma (ie, air-isolated blood specimens) that has not been subjected to gas balance treatment. It is an indicator reflecting the metabolic factors of acid-base balance; actual bicarbonate and standard bicarbonate In contrast, it is affected by metabolic and respiratory factors. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Tips: Before taking blood, please explain whether you are taking oxygen. Normal value 22 to 27 mmol/L, and the average value was 24 mmol/L. Clinical significance Normally, the actual bicarbonate (AB) and standard bicarbonate (SB) are equal. 1. Both AB and SB are elevated, and the increase in AB > SB is more common in metabolic alkalosis or compensatory respiratory acidosis. 2. Both AB and SB decreased, and AB decreased in value for metabolic acidosis or compensatory respiratory alkalosis. 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 Blood gas and acid and alkali analysis. Not suitable for the crowd no. Adverse reactions and risks Discomfort: There may be pain, swelling, tenderness, and visible subcutaneous ecchymosis at the puncture site.