PSA, free and total NWH Order Code: FPSA 
    Site
 
NWH
 
    System
 
SUNQUEST LAB
 
    Epic Lab Code
 
LAB4151
 
    Local Code
 
FPSA
 
    Department
 
CHEMISTRY
 
    Specimen
 
BLOOD
 
    Container
 
PST:  Light green top tube, Lithium Heparin, gel, 5 ml
 
    Collection Instructions
 
Label specimen with Sunquest Specimen Label. Refer to NWH Clinical policy on Labeling Laboratory Specimens for additional details.
 
    Testing Schedule
 
Daily, 24 hours
 
    Turnaround Time
 
Routine: Up to 4 hours
Stat: 1 hour from receipt in Laboratory
 
    Reference Range
 
0.0 - 4.0 ng/mL
 
    Alternate names
 
PSA FREE & TOTAL
 
    Test Usage
 
The percentage of measured PSA existing in the free form (free/total PSA ratio) is useful in assessing the risk of prostate cancer in patients with borderline or moderately increased total PSA (2-10 ng/mL) and have been used to help select men who should have follow-up prostate biopsy. Most prostate cancers are slow growing, so the utility of prostate cancer screening is marginal in most men with a life expectancy of less than 10 years.
 
    Methodology
 
Electrochemiluminescence Immunoassay Sandwich Principle
 
    Rejection Criteria
 
Improper labeling. High impact hemolysis, lipemia and icteric specimens. quantity not sufficient
 
    Send Out
 
No
 
    Last Update
 
3/7/2025 11:30:40