Pathology Handbook

PLEASE NOTE: Recent changes have been made to this Test

Recent changes for PSA; Free
Date	Field	Changed From	Changed To
31st July 2024	Alternative names	Prostate Specific Antigen; Free	Prostate Specific Antigen; Free, PSA Ratio

PSA; Free

Alternative Names:

Prostate Specific Antigen; Free
PSA Ratio

Laboratory:

Clinical Biochemistry

Test Code:

PSAF

Specimen Types:

Serum

Container Types:

SST

Collection & Request Instructions:

If total PSA level is borderline, Free PSA / Total PSA ratio assists differentiation of prostate cancer from benign prostatic hypertrophy. Prostate cancer has increased serum-complexed PSA compared to free PSA.

Transport Instructions between Sites and/or Laboratories:

Room Temperature

Additional Notes:

Reference Ranges:

Normal: > 28%
Equivocal: 9—27%
Abnormal: < 8%

Method used is Abbott Alinity (CMIA).

Pathology Handbook

PLEASE NOTE: Recent changes have been made to this Test

Alternative names

PSA; Free