Yale New Haven Hospital

Department of Laboratory Medicine
Test Directory

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Protein S, total and free antigen

Lab Section: 

Coagulation

 

Lab Location: 

Main Lab

Test ID: 

LAB760

 

Synonyms:

PRSTF

 

Methodology: 

Immunoturbidometric

Schedule: 

1-2 times/ week

Reported: 

3 - 5 days

Specimen Requirements: 

Collection: 2.7 mL Blood in a Blue Top Tube.
Pediatric volume: 2.7 mL.
Collect two (2) 2.7-mL blue top tubes.

Transport: Whole blood may be transported at ambient or refrigerated temperature. Separated plasma, not yet frozen, may be transported at refrigerated temperature, while frozen plasma should be sent on dry ice to prevent thawing in transit.
Unacceptable conditions: QNS; Overfilled; clotted

 

Notes: 

Reflex Criteria: Abnormal results reflex to MD interpretation.

Clinical Indications: Further evaluation of a hypercoagulable state when Protein S activity is low.

Protein S total and free antigen tests are performed as a panel. If additional testing is needed, additional tubes are necessary.

Tests in this Panel: 

Test Name

Reference Interval

Protein S Ag, Free [LRR15820]

Age Limit

Sex

Normal Range

0 - 5 Years

Any

20

70 %

6 Years - 10 Years

Any

20

60 %

11 Years - 15 Years

Any

20

55 %

15 Years - 999 Years

Any

51

137 %

Protein S Ag, Total [LRR15821]

Age Limit

Sex

Normal Range

0 - 1 Days

Any

10

60 %

2 Days - 5 Days

Any

20

80 %

6 Days - 1 Months

Any

35

95 %

1 Months - 5 Years

Any

55

120 %

6 Years - 10 Years

Any

40

115 %

11 Years - 15 Years

Any

50

90 %

15 Years - 999 Years

Any

60

122 %

CPT Code(s): 

85305, 85306

Last Changed: 

8/18/2017 10:38 AM

Last Reviewed: 

8/18/2017 10:38 AM