Determination of acidity and alkalinity (pH) value

Blood pH is the negative logarithm of hydrogen ion concentration. Arterial blood is usually measured without contact with air. It has a major impact on life activities. The progress of cell biochemical changes, growth and distribution, as well as the growth of bacteria, viruses, wound healing, cell-to-cell adhesion, etc., are all affected by blood pH. Human blood pH is relatively constant. When the blood pH is below 6.9 or exceeds 7.7, life is at risk. Basic Information Specialist classification: growth and development examination classification: blood examination Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Reduced in decompensated acidosis. Normal value: Arterial blood: 7.35-7.45 Venous blood: 7.33-7.41 Above normal: Elevation is seen in compensatory alkalosis. negative: Positive: Tips: Before taking blood, please explain whether you are taking oxygen. Normal value Arterial blood is 7.35 to 7.45. Venous blood is 7.33 to 7.41. (37 ° C must be corrected according to body temperature). Clinical significance Reduced in decompensated acidosis, such as diabetic ketoacidosis, excessive loss of alkaline fluids, pulmonary edema, obstructive pulmonary disease, persistent asthma, anesthesia, etc. Elevation is seen in compensatory alkalosis, such as excessive intake of alkali, excessive ventilation, persistent vomiting, and excessive potassium loss. Low results may be diseases: vasoactive intestinal peptide tumor results are high may be diseases: metabolic 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. Adverse reactions and risks Subcutaneous hemorrhage: subcutaneous hemorrhage due to less than 5 minutes of compression time or blood draw technique.

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