vitamin a test…

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what the risks are blood test, retinol test, vitamin a blood test measures the amount, vitamin a, beta-carotene, adult, child, blood is drawn, a vein, the elbow, the hand, puncture site is cleaned, antiseptic, a tourniquet, around the upper arm to apply pressure, restrict blood flow, the vein, veins below the tourniquet to fill, blood, a needle is inserted, vein, blood is collected in an air-tight vial, a syringe, tourniquet is then removed, restore circulation, after blood has been collected the needle is removed, puncture site is covered to stop any bleeding, infant, young child, area is cleansed, antiseptic, punctured, a sharp needle, a lancet, blood collected, pipette, small glass tube, on a slide, onto a test strip, into a small container, a bandage applied, puncture site, any bleeding, fast, 4 hours, infants, children, test depends on child's age, level of trust, prepare child, infant test, procedure preparation, birth to 1 year, toddler test, procedure preparation, 1 to 3 years, preschooler test, procedure preparation, 3 to 6 years, schoolage test, procedure preparation, 6 to 12 years, adolescent test, procedure preparation, 12 to 18 years, the needle is inserted to draw blood, feel moderate pain, others feel only a prick, stinging sensation, some throbbing, to investigate the possibility of vitamin a deficiency, excess, rare, in the developing world, normal values range from 50 to 200 mcg/dl, normal value ranges, among different laboratories, mcg/dl = microgram per deciliter abnormal values reflect a deficiency of vitamin a that associated, developmental aberrations of bones, teeth in young children, dry, inflamed eyes, hair loss, loss of appetite, malabsorption syndrome, celiac disease, sprue, night blindness, recurring infections, skin rashes, steatorrhea, fat malabsorption, inadequate absorption of fats, intestinal tract, risks associated, venipuncture, slight, excessive bleeding, fainting, feeling lightheaded, hematoma, blood accumulating under the skin, infection, a slight risk, the skin is broken, multiple punctures to locate veins, veins, arteries vary in size, obtaining a blood sample.