Bloodworks Northwest Laboratories
Compatibility Testing Laboratory
Sample Requirements
Use Request for Blood and Transfusion testing, Preadmission Request for Blood, or Report of Suspected Hemolytic Transfusion Reaction order forms.
Order | Sample Requirements | ||
>5 Years Old | 1-5 Years Old* | <1 Year Old | |
Autologous WB/RBC | 1 full 7 mL EDTA | ||
Emergency Crossmatch WB/RBC
Routine Crossmatch WB/RBC |
1 full 7 mL EDTA | 1 full 3 mL EDTA tube | 2 full 0.5 mL EDTA Microtainers |
Crossmatch-Pediatric RBC | 1 full 7 mL EDTA | 1 full 3 mL EDTA tube | 2 full 0.5 mL EDTA Microtainers |
Outpatient Transfusion | 2 full 7 mL EDTA** | 1 full 3 mL EDTA tube | 2 full 0.5 mL EDTA Microtainers |
Suspected Hemolytic Transfusion Reaction | 1 full 7 mL EDTA | 1 full 3 mL EDTA tube | 2 full 0.5 mL EDTA Microtainers |
Hold Sample | 1 full 7 mL EDTA | 1 full 3 mL EDTA tube | 2 full 0.5 mL EDTA Microtainers |
Infant Protocol | 2 full 0.5 mL EDTA microtainers to enroll on Infant Protocol. Additional samples not required after enrolled on Infant Protocol during this hospitalization | ||
Preadmission Crossmatch
Preadmission Type and Screen |
2 full 7 mL EDTA** | 1 full 3 mL EDTA tube | |
Type and Screen | 1 full 7 mL EDTA | 1 full 3 mL EDTA tube | 2 full 0.5 mL EDTA Microtainers |
* When a child’s blood volume is adequate to tolerate collection of a 7 mL sample, it is best to collect the full 7 mL sample to avoid re-draws if an antibody is identified or more blood is needed.
** When orders are placed for an Outpatient Transfusion or Preadmission Order, for patients > 5 years old it is preferable to send two full 7 mL samples to avoid re-draw if the patient has antibody that must be identified.
Transporting Samples
All samples must be sent to the Blood Center in a sealed, leak-proof container marked with a biohazard sticker to comply with OSHA safety standards.
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Contact us: 206-689-6525