Back to Test Catalogue

Protein S – Free and Total, Plasma

Test ID: PROSFRT
Test
Specimen
Performance / Interpretation
Interface / Setup

Test

Method

Latex Immunoturbidimetric

Report Includes

Protein S - Free; Protein S - Total

Specimens

Plasma (Citrate)

Clinical Utility

Testing for protein S deficiency during an acute illness or anticoagulant therapy is not recommended.

Test Location

Laboratory Reference Centre, 237 Barton Street E, Hamilton ON L8L 2X2

Test Version

15-Dec-2022

Specimen

Specimens

Plasma (Citrate)

Collection Containers

Blue top (3.2% buffered citrate)

Sample Volume

3 mL

Patient Preparation

Patient should not be on anticoagulant therapy.

Collection & Handling

Handling Information

Prepare platelet-poor plasma and freeze immediately. Store and send frozen.

Stability

Frozen 2 weeks at ≤-20°C

Additional Stability Information

If the specimen thaws, it is unsuitable for analysis.

Rejection Criteria

Specimen Not frozen

Test Version

15-Dec-2022

Performance / Interpretation

Method

Latex Immunoturbidimetric

Turnaround Time

10 days

Results

Name Units Reference Range Conversion Factor
Protein S - Total U/mL
  • Female: 0.65 - 1.35
  • Male: 0.86 - 1.40
Protein S - Free U/mL
  • 0 - 30 days: 0.61 - 1.08
  • 1 - 5 months: 0.48 - 1.27
  • 6 - 11 months: 0.63 - 1.39
  • 1 y -5 y:0.53 - 1.35
  • 6 y - 10 y: 0.62 - 1.42
  • 11 y - 17 y: 0.61 - 1.31
  • Adult, female: 0.55 - 1.24
  • Adult, male: 0.74 - 1.46

Test Location

Laboratory Reference Centre, 237 Barton Street E, Hamilton ON L8L 2X2

Test Version

15-Dec-2022

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
PROSFRT 7303PROTEIN S FREE U/mL
7302PROTEIN S TOTAL U/mL

Test Version

15-Dec-2022