Specimen

Peripheral Blood (maternal)

Collection Medium:

Minimum:

1 mL whole blood

Delivery Instructions:

Deliver to laboratory immediately after collection.
Refrigerate at 2-8 degrees C

Testing Schedule:

0800-1630 Monday through Friday.  For additional services, 
contact Clinical Pathology Resident on-call at pager #3404.

Analytic Time:

24 hours (upon receipt in laboratory)

Reference Range:

Reference range is less than 0.45%
Positive specimens reported as percent of maternal cells.

Note: This reference range is established as the level at which greater 
than the usual 300 micrograms dose administered to Rh-negative women at 
delivery is required to prevent sensitization.

The normal "Hemoglobin F value" for non-pregnant adults is less than 
0.1%.

Comments:

Please identify as MATERNAL or FETAL specimen. Screening test for 
fetal-maternal bleed.

This test replaces the Kleihauer-Betke stain.

Methodology:

Flow Cytometry

CPT Code:

88184

See Additional Information:
Specimens Requiring Immediate Delivery