Protein S, Functional
CMH Lab Section
2.7 mL in a sodium citrate light blue tube
Turn Around Time
Batched: once/wk Thursdays
If activity is <60% antigenic testing will be performed.
Samples on patients < 6 months old will not be tested for functional Protein S; they will automatically be sent for Protein S Antigen testing.
Antigen testing is a sendout.
Send specimen to Hematology ASAP
mechanical clot detection
<6 months no ranges established
>6 months 70-140%