Useful as an indicator of in vivo breakdown of hemoglobin to differentiate cerebral hemorrhage from a traumatic tap.
Within 24 hours
CSF. Collect at least 12 hours after suspected hemorrhage. Use the last (ideally the fourth) specimen post lumbar puncture. AND serum separator tube.
CSF: Transport to local lab quickly and avoid pneumatic tube transport if possible. Protect from light during collection, storage and shipment. Centrifuge for 5 minutes ASAP or within 1 hour of collection. Transfer 2 mL CSF to an ARUP Amber Transport Tube. (Min: 1 mL) Do not freeze.
Serum: Protect from light during collection, storage and shipment. Allow specimen to clot completely at room temperature. Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Amber Transport Tube. (Min: 0.5 mL)
Specimens not protected from light. Frozen CSF.
CSF: Ambient: 4 hours; Refrigerated: 1 week; Frozen: Unacceptable
Serum: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 6 months
Effective July 18, 2011
|Net Absorbance, Bilirubin, CSF||Effective July 18, 2011
0.007 AU or less
|Net Absorbance, Oxyhemoglobin, CSF||Effective July 18, 2011
0.020 AU or less
|0020032||Bilirubin, Total, Serum or Plasma||By report|
Refer to report.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Laboratory Developed Test (LDT)
84311 x2; 82247
|Component Test Code*||Component Chart Name||LOINC|
|2005249||Net Absorbance, Bilirubin, CSF|
|2005250||Net Absorbance, Oxyhemoglobin, CSF|