First Trimester Screen Biochemistry Markers


Sunquest Code:TRI1SC  
Epic Code:LAB3071Epic Name:First Trimester Screen Biochem Markers
Synonyms:Downs Syndrome
CPT Code:84163, 84704, 82105
Test Includes:Trisomy 13, 18, 21, Alpha Fetoprotein (AFP), Free Beta hCG, Pregnancy Associated Plasma Protein-A (APP-A)
Associated Links:

Genetic Testing Consent Form



Collection Instructions

Specimen:Blood
Optimal Volume:1 mL
Minimum\Peds Volume:0.5 mL
Collection Instructions:

Reference laboratory will provide filter paper (for sample collection), envelope and FedEx label. The specimen cannot be collected with any additives.

1.     Obtain blood specimen Monday through Friday during patient’s first trimester.

2.     Collect 0.5-1.0 mL of blood into plain syringe by standard venipuncture method.

3.     Fold flap to right (away from blood circles) before collection during drying. Carefully dispense blood from syringe drop by drop onto each circle until the 5 circles are filled completely. Blood should be filled from one side and should soak through the backside of the five circles.

4.     Allow blood spots to dry at room temperature for 3 hours in horizontal position. Keep away from direct sunlight and heat. Do not stack specimen papers during drying.

5.     After drying, place requisition in transport envelope.

6.     Store specimen in cool, dry place until transported.

 

Causes for Rejection:

 

Unacceptable specimens:

1.     Blood to both sides of the paper.

2.     Capillary tubes used to collect the sample.

3.     Paper circles touched prior to or after blood collection.

 

 



Processing and Shipping

Shipping Instructions:Ship at room temperature. Send via FedEx using the FedEx Express Expandable Billable Stamp addressed to Eurofins/NTD Labs, 80 Ruland Road, Suite #1, Mellville, NY 11747, (631) 425-0800.
Test Performed at or Referral Lab Lab Sendouts  (NTD Laboratories, Inc.)
Referral Lab number:na


Interpretive

Reference Range:Positive or negative.


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