ARUP's Laboratory Test Directory

Periodic Acid Schiff Stain : 0049045

Mnemonic: PAS

Methodology: Stain
Performed: Mon-Fri
Reported: 1-5 days
Specimen Required: Collect:  Peripheral Blood: One 5 mL lavender (EDTA) or pink (K2EDTA), or one 7 mL green (sodium or lithium heparin); Bone Marrow: 1 mL heparinized aspirate; Paraffin: block or four unstained paraffin slides cut at 4 microns.

Storage/Transport Temperature:  Peripheral Blood: 5 mL whole blood (EDTA) or 7 mL whole blood (green, heparin) and six unfixed smears; Bone Marrow: 1 mL heparinized aspirate and six unfixed smears; transport peripheral blood and bone marrow at 20-25°C.  Paraffin: must be protected from excessive heat; ship in cooled containers during summer months.  Send Sunday-Thursday only.
Minimum volume required
: Peripheral Blood: 1 mL whole blood (lavender, EDTA) and six unfixed smears, or 1 mL whole blood (green, heparin) and six well-prepared unfixed smears.  Bone Marrow: 1 mL heparinized aspirate and 6 well-prepared unfixed smears.  Paraffin: block or four unstained paraffin slides cut at 4 microns. Transport peripheral blood and bone marrow at 20-25 Degrees C.  Paraffin: must be protected from excessive heat; ship in cooled containers during summer months. Send Sunday-Thursday only.


Remarks:  Specimens must be received within 24 hours of collection; testing must be performed within 48 hours of collection.

Unacceptable Conditions:  Fixed smears.

Stability (collection to initiation of testing):  Blood/Bone marrow: Ambient: 24 hours; Paraffin: Indefinitely
Reference Interval:
By report
CPT Code(s): 88313
 
 

 

 

 
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