Inactivated/Replace Test

Effective Date

05/15/2023

Notes

ARUP 2005077 -> ARUP 3006247

Inactivated Test Details

Mnemonic

PWSA

Ordering Code

3688850

CPT-4 Codes(s)

81331

Replacement Test Details

Mnemonic

ANGLM

Ordering Code

3600286

CPT-4 Codes(s)

81331

Turnaround Time
14 - 16 days
Performed
Varies
Legacy Code
ANGLM
Example Report
Abnormal Report

Specimen Information

Collect

Lavender EDTA

Specimen Preparation

Send 3.0 mL whole blood.

Alternate Specimen

Fetal Specimen:
Collect:
Two T-25 flasks at 80 percent confluent of cultured amniocytes AND Maternal Whole Blood
Specimen: Lavender (EDTA), pink (K2EDTA), or yellow (ACD solution A) Fetal Specimens will require MCCFETAL testing to be added on by ARUP, and additional charges will apply.

Specimen Preparation:
Cultured Amniocytes: Fill flasks with culture media. Transport two T-25 flasks at 80 percent confluent of cultured amniocytes filled with culture media. Backup cultures must be retained at the client's institution until testing is complete. If ARUP receives a sample below the minimum confluence, CG GRW&SND (0040182) will be added on by ARUP, and additional charges will apply.
If clients are unable to culture specimens, CG GRW&SND should be added to initial order.
Maternal Whole Blood Specimen: Transport 3 mL whole blood (Min: 1 mL)

Transport Temperature:
Cultured Amniocytes: CRITICAL ROOM TEMPERATURE. Must be received within 48 hours of shipment due to viability Maternal Whole Blood Specimen: Refrigerated. Also acceptable:
Ambient.

Minimum Volume

1.0 mL

Transport Temperature

Refrigerated

Rejection Criteria

Direct chorionic villus sampling (direct CVS), direct amniotic fluid (direct AF), plasma, serum, and
tissue (FFPE)

Stability

Nonfetal Specimens, Whole Blood:
Room temperature: 7 days
Refrigerated: 30 days
Frozen: Unacceptable

Fetal Specimens, Cultured Amniocytes:
Room temperature: 48 hours
Refrigerated: Unacceptable
Frozen: Unacceptable

Maternal Whole Blood Specimen:
Room temperature: 7 days
Refrigerated: 30 days
Frozen: Unacceptable

Methodology

Qualitative/Methylation-Specific Multiplex Ligation-Dependent Probe Amplification (MS-MLPA)
more

Reference Range

Interpretive report
more

Performing Laboratory

ARUP
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