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Protein S Activity

Centralized Core Laboratory : Hematology

Test ID/Workstation :
PRTS3 MAYO
Specimen Type:
Blood
Tube Type:
Blue top (sodium citrate) tube
Collection Volume:
2.7 mL
Storage:
Frozen
Availability:
Sent to reference lab
Methodology:
Optical Clot-Based
Special Instructions:
    Days Performed: Monday through Friday; 12 p.m.
    Centrifuge, remove plasma, and centrifuge again. Please send 1 mL frozen citrated plasma.
If collected at an offsite location, send by a STAT Courier to Hospital lab.
Lab/Phone:
330-543-8418
TAT:
1-4 days
Additional Info:
    Males: 65-160%
    Females
    <50 years: 50-160%
    or =50 years: 65-160%
Newborn infants have normal or near-normal free protein S antigen (> or =50%), although total protein S antigen is usually below the adult reference range. There are insufficient data concerning protein S activity in normal neonates, infants, and children; but normal or near-normal activity (> or =50%) probably is present by age 3 to 6 months.
CPT Code:
85306
Synonyms:
-