Compatibility Testing Laboratory

Transfusion Service
Bloodworks Northwest has provided blood and blood components to patients in King County Hospitals since 1944, and now supplies blood to over 70 hospitals and outpatient agencies in 14 counties in Western Washington. The centralized Transfusion Service performs 500,000 compatibility procedures, prepares and delivers over 45,000 whole blood platelets, 13,000 apheresis platelets, 50,000 fresh frozen plasma, 1,000 cryoprecipitate pools and 200 granulocytes annually.

The centralized Transfusion Service consists of four departments.

  • Inventory Management distributes blood and blood components to Regional Hospitals in Western Washington and manages inventory between the four Transfusion Service Laboratories..
  • Order Processing receives and enters orders for blood and blood components and prepares blood components for transfusion.
  • Compatibility Testing Laboratory performs serologic procedures for pretransfusion and non-transfusion orders.
  • Red Cell Reference performs immunohematologic procedures to identify red cell antibodies for local and regional hospitals. Refer to Red Cell Reference Lab for additional information.

Four Transfusion Service Laboratories are located in King County. Each laboratory is staffed 24 hours per day, seven days a week with trained staff. In addition, a Blood Center physician is available at all times for consultation and can be reached by phoning 206-689-6525.

  • Seattle/First Hill
    921 Terry Avenue
    Seattle, WA 98104-2022
    Phone: 206-689-6525
    Fax: 206-343-1780
  • Seattle/University District Laboratory
    5025 – 25th Avenue Northeast, Suite 205
    Seattle WA
    Phone: 206-522-2462
    Fax: 206-522-5948
  • Bellevue/Eastside Transfusion Service
    1021–112th Avenue Northeast
    Bellevue, WA
    Phone: 425-453-4560
    Fax: 425-453-5095
  • Renton/Renton Transfusion Service
    4011 Talbot Rd. S. Suite 100
    Renton, WA
    Phone: 425-656-7900
    Fax: 425-656-7945

The Blood Center Hospital Links, an internet website, enables hospital personnel to view order status, test results, and reports electronically. Hospital staff must contact their hospital links user administrator for access to the websites.

The laboratory’s procedures meet the requirements, regulations of the Food and Drug Administration and the American Association of Blood Banks. The quality assurance program consists of semi-annual competency assessment of all staff and subsequent competency assessment of staff prior to implementation of new procedures and tests, participation in College of American Pathologists (CAP) blood banking proficiency testing program; analysis and trending of error and incident reports; QC testing of blood components, daily and monthly review of QC testing, and participation in local, regional, and national continuing education programs.


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