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Q: The MOST sensitive liver function tests are 1) Prothrombin Time (PT) 2) International Normalized Ratio (INR) 3) Bilirubin?
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Which blood chemical is light sensitive?

The blood chemical constituant that is light sensitive is Bilirubin..


What are some specimens that are light sensitive?

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Why would newborn babies be exposed to sunshine?

0-6 months: Infants under 6 months of age should be kept out of the sun. Their skin is too sensitive for sunscreen. An infant's skin possesses little melanin, the pigment that gives colour to skin, hair and eyes and provides some sun protection. Therefore, babies are especially susceptible to the sun's damaging effects.So it isn't really safe but, only some people do it but, there isn't a clear reason why.HERE IS ANOTHER ANSWER:A common condition for newborns is jaundice (yellowing of the skin and sclera of the eyes). Jaundice occurs when the baby produces more bilirubin than the liver can process. Bilirubin is a by product of normal breakdown of red blood cells. The three most common reasons for excess bilirubin are excess production of bilirubin due to the baby's normally higher than adult turn over of red blood cells, immature liver that cannot keep up with normal bilirubin production, or reabsorption of bilirubin by the intestines. the most common treatment of jaundice is phototherapy, the exposure of the child to special lighting that helps alter the by product to make it easier for the child's liver to process it. Some pediatricians may suggest the exposure of the child to brief periods of natural daylight if bilirubin levels are below 15-25mg.


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Bilirubin - blood?

DefinitionBilirubin is a yellowish pigment found in bile, a fluid produced by the liver.This article discusses the laboratory test done to measure bilirubin in the blood. Total and direct bilirubin are usually measured to screen for or to monitor liver or gallbladder problems. Large amounts of bilirubin in the body can lead to jaundice.A test may also be done to measure bilirubin in a urine sample. For information on that test, see: Bilirubin - urine.Alternative NamesTotal bilirubin - blood; Unconjugated bilirubin - blood; Indirect bilirubin - blood; Conjugated bilirubin - blood; Direct bilirubin - bloodHow the test is performedA blood sample is needed. For information on how this is done, see: Venipuncture.The laboratory specialist spins the blood in a machine called a centrifuge, which separates the liquid part of the blood (serum) from the cells. The bilirubin test is done on the serum.How to prepare for the testYou should not eat or drink for at least 4 hours before the test. Your health care provider may instruct you to stop taking drugs that affect the test.Drugs that can increase bilirubin measurements include allopurinol, anabolic steroids, some antibiotics, antimalaria medications, azathioprine, chlorpropamide, cholinergics, codeine, diuretics, epinephrine, meperidine, methotrexate, methyldopa, MAO inhibitors, morphine, nicotinic acid, birth control pills, phenothiazines, quinidine, rifampin, steroids, sulfonamides, and theophylline.Drugs that can decrease bilirubin measurements include barbiturates, caffeine, penicillin, and high-dose salicylates such as aspirin.Why the test is performedThis test is useful in determining if a patient has liver disease or a blocked bile duct.Bilirubin metabolism begins with the breakdown of red blood cells in many parts of the body. Red blood cells contain hemoglobin, which is broken down to heme and globin. Heme is converted to bilirubin, which is then carried by albumin in the blood to the liver.In the liver, most of the bilirubin is chemically attached to another molecule before it is released in the bile. This "conjugated" (attached) bilirubin is called direct bilirubin; unconjugated bilirubin is called indirect bilirubin. Total serum bilirubin equals direct bilirubin plus indirect bilirubin.Conjugated bilirubin is released into the bile by the liver and stored in the gallbladder, or transferred directly to the small intestines. Bilirubin is further broken down by bacteria in the intestines, and those breakdown products contribute to the color of the feces. A small percentage of these breakdown compounds are taken in again by the body, and eventually appear in the urine.Normal ValuesDirect bilirubin: 0 to 0.3 mg/dLTotal bilirubin: 0.3 to 1.9 mg/dLNote: mg/dL = milligrams per deciliterNormal values may vary slightly from laboratory to laboratory.What abnormal results meanJaundice is a yellowing of the skin and the white part of the eye, which occurs when bilirubin builds up in the blood at a level greater than approximately 2.5 mg/dL. Jaundice occurs because red blood cells are being broken down too fast for the liver to process. This might happen due to liver disease or bile duct blockage.If the bile ducts are blocked, direct bilirubin will build up, escape from the liver, and end up in the blood. If the levels are high enough, some of it will appear in the urine. Only direct bilirubin appears in the urine. Increased direct bilirubin usually means that the biliary (liver secretion) ducts are obstructed.Increased indirect or total bilirubin may be a sign of:Crigler-Najjar syndromeErythroblastosis fetalisGilbert's diseaseHealing of a large hematoma (bruise or bleeding under the skin)Hemolytic anemiaHemolytic disease of the newbornHepatitisPhysiological jaundice (normal in newborns)Sickle cell anemiaTransfusion reactionPernicious anemiaIncreased direct bilirubin may indicate:Bile duct obstructionCirrhosisDubin-Johnson syndrome (very rare)HepatitisIntrahepatic cholestasis (buildup of bile in the liver) due to any causeAdditional conditions under which the test may be performed:Biliary strictureCholangiocarcinomaCholangitisCholedocholithiasisHemolytic anemia due to G6PD deficiencyHepatic encephalopathyIdiopathic aplastic anemiaIdiopathic autoimmune hemolytic anemiaImmune hemolytic anemia (including drug-induced immune hemolytic anemia)Secondary aplastic anemiaThrombotic thrombocytopenic purpuraWilson's diseaseSpecial considerationsFactors that interfere with bilirubin testing are:Hemolysis (breakdown) of blood will falsely increase bilirubin levelsLipids in the blood will falsely decrease bilirubin levelsBilirubin is light-sensitive; it breaks down in lightReferencesBerk PD, Korenblat KM. Approach to the patient with jaundice or abnormal liver test results. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 150.


What is a sentence with the word sensitive?

He has sensitive teeth so he uses special toothpaste.Her feet were very sensitive.Sensitive people are usually very quiet.Be sensitive because he is upset.This file contains sensitive information.I am sorry but I cannot give that kind of sensitive information to you.


How can your face be sensitive?

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What has the author Markus J Kachel written?

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