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FETAL LUNG MATURITY (087-3745) Synonyms: FLM, L/S ratio CPT 4 Code: 83661 Test Order mnemonic: FLM Lab: Clinical Chemistry Request Form: Special Chemistry Form 2 Collection: Prefer: transabdominal amniocentesis. Accept: specimens obtained from a pool of fluid in the vagina immediately after rupture of the membranes. Storage Instructions: Store the sample at 2-8°C in a capped container. If delivery to the lab is delayed for more than a week, freeze specimen at –20°C. Causes for Rejection: Improperly labeled. Availability: Samples are received 24 hrs per day at Sample Management, Room 5.136 McCullough. Turnaround Time: Routine: 4 hours; STAT: 1 hour Specimen: Amniotic fluid Volume: 6 mL Minimum Volume: 2 mL Container: Capped syringe. Reference Range: Immature: <39 mg/g; Mature: > 55 mg/g Test Method: FPLA Reviewed/revised April 2007 by P. Harris |
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