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HelpTest Code LAB3929 Chylomicrons, Pleural Fluid
Performing Laboratory
Barnes-Jewish Hospital Laboratory
Methodology
Visual
The presence of chylomicrons is tested by the qualitative “standing plasma” test. Specimen is allowed to stand undisturbed for >12 hours at 4° C.
Specimen Requirements
Specimen Type: Pleural fluid
Container/Type: Mint Green top tube
Specimen Volume: 2 mL
Additional Information: Indicate fluid type on specimen container.
Day(s) Test Set Up
Monday through Sunday
Turnaround Time:
STAT: not available
Routine: results available the next day
Test Classification and CPT Coding
84999
Reference Values
None present
Note: Pleural fluids with a cloudy supernatant can be tested for the presence of chylomicrons to aid in distinguishing between pseudochylothorax effusions (chylomicrons absent) and chylothorax effusions (chylomicrons present). Pleural fluid triglyceride determination is also recommended. Pleural fluids with triglyceride values >110 mg/dL can be classified as a chylothorax with high-specificity while triglyceride values <50 mg/dL indicate a nonchylous effusion. Cholesterol measurements may be helpful for specimens with equivocal results. Pseudochylothorax effusions often have high cholesterol levels (>250 mg/dL) while true chylo effusions will have low cholesterol values.
Specimen Transport Temperature
Ambient
Additional Information
For BJH Laboratory Use Only
Alternate Tube Type: Red top tube
Analyte Stability:
See Analyte Stability Chart under General Information for a complete list.
Laboratory Processing Instructions:
Test performed in BJH Core lab. Centrifuge upon receipt. Deliver to the Cobas 8000 in Chemistry. Completed specimen is stored refrigerated for 5 days.
LOINC Code Information
| Name | LOINC Code |
| Chylomicrons, Pleural Fluid | 33375-7 |