RBC Genotype, Single Antigen (Sendout)

Test Information: This test uses PCR to determine or confirm a patient's red cell antigen typing. New variant alleles may not be identified. In some situations, the genetic typing may not reproduce the red cell phenotyping results. Fetal samples can be genotyped for compatibility with mothers with non-RH isoimmunization.

Ordering Requirements:

• A completed Bloodworks Northwest Genomics Testing Laboratory Requisition must accompany all orders. Leave the billing section blank to be completed by Sendouts staff.
• The antigen system* to be tested must be specified on the requisition.
  
  • *Examples: RHC (C/c); RHE (E/e); Kell (K/k), Kidd (Jka/Jkb); Duffy (Fya/Fyb; GATA mutation); Dombrock (Doa/Dob), etc.

Whole Blood: 10 mL whole blood in LAVENDER TOP (EDTA) tube

• Note: For very difficult draws, contact the Genomics Testing Lab at Bloodworks NW at 206-689-6269 for approval of microtainers.

Cultured Amniocytes: 2 T25 Flasks cultured to confluency.

• Amniotic fluid is not accepted.
• An EDTA whole blood sample from the mother of the fetus is required for cultured amniocyte orders.
• Samples sent on Fridays must be received at Bloodworks Northwest Genomics Lab by 1 p.m.

Labeling Requirements:

• The sample label and requisition must contain two matching identifiers, one being the full name, and the second a numeric identifier like hospital ID/MRN.
• A matching draw date must be included on the specimen label and the requisition form.

Outside Laboratories:

• Store and transport whole blood or cultured amniocytes at ambient temperature.
• Expedite transport; samples must be received by Bloodworks NW within 48 hours of collection. Allow for one day of transport from UW-MT to Bloodworks Northwest.
  • Unless the cells are cultured at UW-MT Cytogenetics and Genomics Lab, clients should arrange to send cultured amniocyte samples directly to Bloodworks NW due to the short stability window (24 hours).
• Submit a completed Bloodworks Northwest Genomics Testing Laboratory Requisition along with the DLMP Requisition.** Leave the billing section blank to be completed by Sendouts staff.
  • **Use client-specific requisition when available. To obtain a client-specific requisition, contact Client Support Services via email at: commserv@uw.edu.

Stability:

• Cultured Amniocytes: Ambient: 24 hours
• Whole Blood: Ambient: 48 hours*

*Contact the Bloodworks NW Genomics Lab at (206) 689-6269 for sample acceptability questions prior to cancelling orders outside of the stated stability window.

Store and transport whole blood or cultured amniocytes at ambient temperature.

• CCultured amniocytes should be sent out same-day; notify Sendout staff upon sample receipt. On Fridays, cultured cells must be received at Bloodworks Northwest by the 1 p.m. cutoff.

Sendouts:

• Order Bloodworks NW Test: 3117-01
• A completed Bloodworks Northwest Genomics Testing Laboratory Requisition must accompany all orders.
  • The sample label and requisition must contain two matching identifiers, one being the full name, and the second a numeric identifier like hospital ID/MRN.
  • A matching draw date must be included on the specimen label and the requisition form.
• UW-MT/HMC Only: If the institution is not already indicated on the requisition, attach a CAST "Bill/Results To" label.
• Package sample(s) with the associated requisition in a biohazard bag (one patient per bag). Orders received with multiple patient samples/requisitions in the same biozard bag will be rejected by Bloodworks NW.
• Send samples via scheduled DLMP Courier pickups or Delivery Express according to the site’s preferred transportation method.
• Cultured amniocytes must be sent same-day. If sent on a Friday, samples must be in lab by 1 p.m.
• Ambient whole blood samples must arrive at Bloodworks within 48 hours* of collection, and cultured amniocytes within 24 hours of collection.

Stability:

• Cultured Amniocytes: Ambient: 24 hours
• Whole Blood: Ambient: 48 hours*

*Contact the Bloodworks NW Genomics Lab at (206) 689-6269 for sample acceptability questions prior to cancelling orders outside of the stated stability window.