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BILIRUBIN, AMNIOTIC FLUID SCAN
Test Code2196
Alias/See Also
"Amniotic Fluid Bilirubin
Delta OD, Amniotic Scan
Liley Scan
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Delta OD, Amniotic Scan
Liley Scan
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CPT Codes
82143
Includes
"Delta OD value at 450 nm
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Preferred Specimen
"Amniotic fluid, protected from light
4 mL
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4 mL
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Minimum Volume
"3.5 mL
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Instructions
"Protect specimen from light. Amniocentesis is performed by physician. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
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Transport Container
"Amber plastic transport tube with amber stopper. (If amber tubes are unavailable, cover standard transport tube completely, top and bottom, with aluminum foil. Identify specimen with patient name directly on the container and on the outside of the alumin
Transport Temperature
Frozen
Specimen Stability
"Protect specimen from exposure to light since bilirubin is unstable in light. Although sterile specimens kept in the dark are reported to be stable for nine months refrigerated and at least 30 days at room temperature, it is probably wiser to keep the sa
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Excessive exposure to light; grossly bloody specimen; specimen contaminated with meconium (A single passage into the amniotic fluid will require about three weeks to clear.)
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Methodology
"Spectrophotometry "
Limitations
"No correction for meconium contamination possible
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Reference Range
"Varies with gestational age
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Clinical Significance
"Evaluate cases of suspected maternal-fetal blood incompatibility, hemolytic disease of the newborn
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