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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; 0.1–1.2 mg/dl – Total serum bilirubin level
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...
Normal levels of bilirubin in blood are below 1.0 mg/dl (17 μmol/L), while levels over 2–3 mg/dl (34–51 μmol/L) typically result in jaundice. [4] [9] High blood bilirubin is divided into two types: unconjugated and conjugated bilirubin. [10] Causes of jaundice vary from relatively benign to potentially fatal. [10]
Serum tests evaluate plasma bilirubin, haemolysis and liver function and are essential for definitive diagnosis. When total serum bilirubin exceeds 2.5 mg/dL and unconjugated bilirubin occupies >85% of total amount, it is classified as unconjugated hyperbilirubinemia. [6]
People with GS predominantly have elevated unconjugated bilirubin, while conjugated bilirubin is usually within the normal range or is less than 20% of the total. Levels of bilirubin in GS patients are reported to be from 20 μM to 90 μM (1.2 to 5.3 mg/dl) [38] compared to the normal amount of < 20 μM. GS patients have a ratio of unconjugated ...
Pathological jaundice in newborns should be suspected when the serum bilirubin level rises by more than 5 mg/dL per day, serum bilirubin more than the physiological range, clinical jaundice more than 2 weeks, and conjugated bilirubin (dark urine staining clothes). Haemolytic jaundice is the commonest cause of pathological jaundice.
[2] [1] A bilirubin level more than 34 μmol/L (2 mg/dL) may be visible. [1] Concerns, in otherwise healthy babies, occur when levels are greater than 308 μmol/L (18 mg/dL), jaundice is noticed in the first day of life, there is a rapid rise in levels, jaundice lasts more than two weeks, or the baby appears unwell. [1]
Serological abnormalities in Rotor syndrome only include elevated total serum bilirubin (typically elevated between 2 and 5 mg/dL but may be as high as 20 mg/dL). [2] Most of the time, alanine aminotransferase, aspartate aminotransferase, gamma-glutamyl transferase, and alkaline phosphatase levels are normal, but mild elevations can be seen. [2]