45270:LECITHIN/SPHINGOMYELIN RATIO & PHOSPHATIDYLGLYCEROL (L/S-PG)
Author PeaceHealth Laboratories
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| Alias Names: |
L/S-PG SA |
| Methodology: |
Thin Layer Chromatography (TLC) |
| Edit Date: |
1/3/2007 |
| Performed: |
Daily at 1300 (STAT at 800) |
| Released: |
Results at 1700 (STAT at 1300) |
| CPT Code: |
83661 / 84081 |
| Specimen Collection Details |
| Collection: |
5 mL amniotic fluid. |
| Handling: |
Centrifuge for 3 minutes at 1700 rpm (lower than routine centrifuging). Transfer supernatant to a plastic, screw-cap vial and label ”spun.” Refrigerate. Include additional clinical information on requisition, i.e., weeks gestation, is patient diabetic, source if not amniotic fluid, e.g., vaginal pool. |
| Standard Volume: |
5 mL amniotic fluid. |
| Minimum Volume: |
3.5 mL amniotic fluid. |
| Transport: |
Refrigerated. |
| Comments: |
Visible meconium or blood greater than 2% Hct may interfere with the L/S ratio. |
| Rejection Criteria: |
Mucoid samples too viscous to pipette. |