Vitamin A tolerance test

The liver is the place to store vitamin A (about 90% of the vitamin A in the body, so the serum vitamin A level can not fully represent the status of the overall vitamin A, that is, when the serum vitamin A level is at a normal low value, there is also a liver storage depletion. Possibly. Therefore, in a suspicious situation, a sensitive and reliable relative dose response test should be used to further determine the subclinical status, vitamin A deficiency status. When tested, oral vitamin A5000U (oil) / kg body weight, fasting 3h or 6h after blood collection . Basic Information Specialist classification: Digestive examination classification: liver function test Applicable gender: whether men and women apply fasting: fasting Tips: Do not wear clothes that are too small or too tight, so as to avoid the sleeves being too tight when blood is drawn or the sleeves are too tight after blood drawing, causing blood vessels in the arms. Normal value 7 to 12 μmol/L (200 to 600 μg/dl). Clinical significance Abnormal results: When it is reduced, liver disease, cirrhosis, malabsorption of vitamin A, indigestion, etc. Need to check the crowd: vitamin A deficiency. Low results may be diseases: liver disease, liver cirrhosis considerations Inappropriate people: generally no special population. Taboo before the examination: It is necessary to cooperate with the doctor to write the correct name, neat and tidy, to avoid confusion caused by the same name or similar names. With these in mind, blood draws are more convenient and faster, and you can better save yourself time for diagnosis. Requirements for inspection: Do not wear clothes that are too small or too tight in cuffs to avoid the sleeves being too tight when blood is drawn or the sleeves are too tight after blood drawing, causing blood vessels in the arms. Different laboratory items should be asked by the doctor and treated differently. Inspection process At the time of testing, oral vitamin A5000U (oil) / kg body weight, blood fasting for 3h or 6h after the test. Not suitable for the crowd Inappropriate people: Generally there are no people who are not suitable. Adverse reactions and risks 1, dizziness or fainting: in the blood draw, due to emotional overstress, fear, reflex caused by vagus nerve excitement, blood pressure decreased, etc. caused by insufficient blood supply to the brain caused by fainting or dizziness. 2. Risk of infection: If you use an unclean needle, you may be at risk of infection.