CD34 Absolute Count

Abbrev Code:34ABS   
Order Code:LAB8001Order Name:CD34 Absolute Count
Synonyms:CD34 Hematopoietic Stem Cell Count
Methodology:Single platform multi-color immunofluorescence and flow cytometry using ISHAGE guidelines
CPT Codes: 86367 x1
Test Includes:Enumeration of hematopoietic progenitor stem cells using a combination of CD45/CD34 monoclonal antibodies. Viability of CD34 positive cells is also assessed.
Turnaround Time:24 hours
Special Instructions:Send samples STAT between 8 am and 5 pm Mon-Fri.  Specimens are accepted Mon-Fri, 24 hours/day. If testing is needed outside of scheduled hours, contact the Flow Cytometry lab. Provide diagnosis, age, collection date and time, specimen type, and any product information.

This test was developed and its performance characteristics determined by University of Minnesota Medical Center, Fairview Clinical Laboratories. It has not been cleared or approved by the US Food and Drug Administration. FDA does not require this test to go through premarket FDA review. This test is used for clinical purposes and should not be regarded as investigational or for research. This laboratory is certified under the Clinical Laboratory Improvement Amendments (CLIA) as qualified to perform high complexity clinical testing.

Collection Instructions

Specimen:Blood, peripheral blood progenitor cell collection, processed bone marrow.
Optimal Volume:3 mL blood; 1 mL peripheral blood progenitor cell collection; 10 x 106 processed bone marrow cells.
Minimum\Peds Volume:1 mL blood; 0.5 mL peripheral blood progenitor cell collection.
Container:Purple (EDTA)
Collection Instructions:
Collect all  specimens aseptically:
  • Blood: Collect in purple top (EDTA) tube, mix well.
  • Peripheral Blood Progenitor Cell Collection: Collect in purple top (EDTA) tube, mix well.
  • Processed Bone Marrow: Place cells in sterile container.

    The sending location should contact IFC at 612-273-5248 prior to sending specimen.
Causes for Rejection:Improper specimen collection or handling; clotted specimen; specimen received more than 24 hours after collection.

Processing and Shipping

Specimen Processing:Do not centrifuge. Handle STAT between 0800 and 1700 Mon-Fri. Store in refrigerator if after hours or on holidays.
Shipping Instructions:Samples should be sent STAT at room temperature between 0800-1700, Mon-Fri.  Contact IFC Laboratory at 612-273-5248 prior to sending specimen.
Refrigerate specimens received after hours or holidays and send at 0800 the next working day and must arrive within 24 hours.
Test Performed at or Referral Lab Immunophenotyping and Flow Cytometry  (UMMC-East Bank)


Use:Flow cytometric evaluation of CD34+ cell level is necessary for measuring the hematopoietic progenitor cells in dose requirement protocols of stem cell transplantation. Quantification of CD34+ cells is also used during mobilization of hematopoietic cells and leukophoresis procedures. The total number of CD34+ cells collected during leukophoresis can be estimated.

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