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Test Code LAB3923 SNP Array, Amniotic Fluid

Important Note

This test is to be ordered by Fetal Center providers ONLY. Amniotic fluid should be sent directly to UW Clinical Genomics Laboratory upon collection. Please scan Constitutional Test Request Form to referencelabteam@seattlechildrens.org.

An Epic order for Grow Cells, Amniotic Fluid [LAB3922] should always be placed in conjunction with this order, as Grow Cells testing is always performed when this testing is requested.

Description

This test detects genomic deletions and duplications much smaller than what can be seen with traditional karyotyping or FISH. It also detects regions of absence of heterozygosity (AOH) caused by uniparental disomy or identity by descent. Ordering providers must choose whether or not variants of uncertain clinical significance are reported.

Sample Requirements

Amniotic Fluid:

  • Collect 15-30 mL of fluid obtained under sterile conditions into Corning tissue culture tubes or tubes from a Baxter amniocentesis tray kit. Discard the first 1 mL of fluid or use for af-AFP testing.

Processing Instructions

These specimens are not recieved by SCH Lab - they are sent directly from the Fetal Center to UW CGL. 

Handling instructions for Fetal Center:

  • Maintain and transport samples at ambient temperature unless otherwise indicated in the Collection section.
  • Sample collection kits are available upon request. Kits include sample collection tubes, transport media (when required), a biohazard bag with absorbent material, a test requisition, and FedEx shipping materials. Contact the lab at 206.598.4488 to request a kit.
  • A completed request form must accompany all orders.
  • Specimens are accepted 24 hrs/day, 7 days/week.

Performing Laboratory

Clinical Genomics Laboratory
University of Washington Health Sciences Building
Room H-561
1959 NE Pacific St
Seattle, WA 98195

Phone: (206) 616-4062

Department

Department: Send Outs

Phone: (206) 987-2563

Availability

STAT Performed TAT
Y Performed weekly   1-2 weeks