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Test Code LAB3917 Constitutional Karyotype, 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. 

Description

This test detects chromosomal aberrations, including both imbalanced (aneuploidy, deletions, duplications) and balanced (translocations and inversions) rearrangements in the genome at low resolution. This test can also distinguish free from translocation-associated trisomy.

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

Cytogenetics and Genomics Laboratory
University of Washington Medical Center, Room NW-125
1959 NE Pacific Street
Seattle, WA 98195-6100

 

Phone: 206.598.4488

Department

Department: Send Outs

Phone: (206) 987-2563

Availability

STAT Performed TAT
Y Performed daily   1-2 weeks