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The bilirubin level found in the body reflects the balance between production and excretion. Blood test results are advised to always be interpreted using the reference range provided by the laboratory that performed the test. The SI units are μmol/L. [52] Typical ranges for adults are: [53] 0–0.3 mg/dl – Direct (conjugated) bilirubin level
Besides its digestive function, bile serves also as the route of excretion for bilirubin, a byproduct of red blood cells recycled by the liver. Bilirubin derives from hemoglobin by glucuronidation. Bile tends to be alkaline on average. The pH of common duct bile (7.50 to 8.05) is higher than that of the corresponding gallbladder bile (6.80 to 7 ...
When total bilirubin levels exceed 40 μmol/L, bilirubin deposition at the sclera, skin, and mucous membranes will give these areas a yellow colour, thus it is called jaundice. [6] The increase in predominantly unconjugated bilirubin is due to overproduction, reduced hepatic uptake of the unconjugated bilirubin and reduced conjugation of bilirubin.
The biliary tract (also biliary tree or biliary system) refers to the liver, gallbladder and bile ducts, and how they work together to make, store and secrete bile. [1] Bile consists of water, electrolytes, bile acids, cholesterol, phospholipids and conjugated bilirubin. [2]
This condition results in jaundice, where the skin and eyes become yellow from the bilirubin in the blood. This condition also causes severe itchiness from the bilirubin deposited in the tissues. In certain types of jaundice, the urine will be noticeably darker, and the stools will be much paler than usual.
Biliverdin has been found in excess in the blood of humans suffering from hepatic diseases. Jaundice is caused by the accumulation of biliverdin or bilirubin (or both) in the circulatory system and tissues. [1] Jaundiced skin and sclera (whites of the eyes) are characteristic of liver failure.
Bilirubin, a yellow bilin, is a breakdown product of heme Bilins , bilanes or bile pigments are biological pigments formed in many organisms as a metabolic product of certain porphyrins . Bilin (also called bilichrome) was named as a bile pigment of mammals , but can also be found in lower vertebrates , invertebrates , as well as red algae ...
In infants, a bilirubin-albumin molar ratio of >0.8 reflecting insufficient bilirubin binding is considered at risk of developing kernicterus but the indicative value in adults remains unclear. [31] Unbound plasma bilirubin past a threshold exerts neurotoxic effects through triggering diversified metabolic cascades.