| Laboratory: | Clinical Biochemistry | ||||
| Test Name: |
PROSTATE SPECIFIC ANTIGEN, FREE (FREE PSA) - (P)
Test Code:
FPSA
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| Clinical Information: |
Test performed at: Health Sciences Centre
This test is indicated for measurement of free PSA in conjunction with total PSA to develop a ratio (% Free PSA) of fPSA to tPSA. This ratio is useful when used in conjunction with total PSA as an aid in distinguishing prostate cancer from benign prostatic conditions in patients that have a normal digital rectal examination and a total PSA value in the 4 to 10 ug/L range. Prostate biopsy is required for the diagnosis of prostate cancer. Patient Preparation Instructions: This test is unaffected by multivitamins (45 - 125 µg biotin) or biotin-only supplements. Additional Information: The test method used is an Electrochemiluminescence (ECLIA) assay manufactured by Roche Diagnostics Inc. and performed on the Cobas Elecsys system. Patient results determined by different assay manufacturers or methods are not comparable and cannot be used interchangeably for patient monitoring. |
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| Collection Devices: |
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| Specimen Required: |
Plasma: 2.0 mL
Pediatric Plasma: 0.25 mL
Stability 5 days refrigerated, 3 months frozen |
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| Referral: |
Serum: 2.0 mL
Samples must be transferred to an aliquot tube and stored frozen if analysis will not be complete within 48 hours (#110-10-05 Serum / Plasma Separation Procedure & Transport)
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| Requisition: | |||||
| Reference Values: |
Free PSA: < 0.9 μg/L
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| Availability: |
Within 1 Day
This test is available to Urologists only
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| See Also: | |||||
| More Information: |