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Test & Collection Guide

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Free PSA

Ordering information:

Free PSA is only clinically useful when the Total PSA is between 2 and 10 ug/L. 

Alternate names:
PSA Free
Test Code:
Specimen types:
Container types:
Serum tube with gelSerum tube with gel
Collection Instructions:
Transport specimen at Room Temperature to lab
Sample haemolysis may make this test unreportable
Minimum Adult Volume:
2 mL
Reference Interval:

F/T PSA ratio  10-60 %

The median free PSA for men of all ages is 25%.


Laboratory Use Only
Storage Instructions:


Transport Instructions:

The Sample must be separated and Frozen. fPSA is only stable for 24 hrs Max. The total PSA must be performed before the chemical pathologist/senior scientist can determine if the request is appropriate.

Laboratory Notes:

Free PSA is now performed in house at Box Hill Hospital.

Chemical Pathologist approval is still required

Pathology Handbook

Test & Collection Guide


Eastern Health Pathology always welcomes the opportunity to improve the service we provide you.