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Peripheral Blood Smear Evaluation Request

Source Blood
Mnemonic BLS
Specimen Requirements

1 x 4 mL or 1 x 3 mL lavender top EDTA tube

Whole blood

Usually accompanies a request for a CBC, however unstained air dried blood films may be submitted accompanied by Hematological data (complete CBC) and patient history.

For CRL sites: If only BLS is indicated on the requisition, a CBC must also be ordered.

If an extra blood smear/slide is requested for a specific hematologist, order ESHEM, refer to Peripheral Blood Smear, Extra Slide Requests 

Specimen Handling
Additional Information Important: If CBC results meet auto-verification criteria, slide evaluation/review will not be performed by pathologist as per established laboratory procedures. 
Testing Location Hematology-All Sites
Testing Frequency Daily
Alternate Name(s) PBS, Blood smear, BLS
Reference Interval