Laboratory Medicine

Test catalogue

Ristocetin Factor Activity
Test Name Ristocetin Factor Activity (Ristocetin Factor, RCOF)
Specimen Type / Requirements Container Type = Blue Tube (Sodium Citrate) Minimum Testing Volume = Full draw 9:1 Ratio (9 parts blood to 1 part anticoagulant)
Specimen Handling Collection Instructions: Must indicate anticoagulant status when ordering to avoid delay. Write your initials, date and time of collection on the collection label. Transportation: In/Outpatients: Send whole citrated blood at room temperature as soon as possible. Referred-in: Send frozen citrated plasma on dry ice. All samples must be sent to the Core Laboratory. Stability: Specimens are stable for 4 hours post collection at room temperature. Specimens which are not tested within 4 hours can be double-spun to remove the citrated plasma. The citrated plasma is stable at -20°C for up to two weeks or -70°C for up to six months. Sample Rejection Criteria:Clotted sample, grossly hemolyzed samples, Unlabeled or samples with insufficient quantity will be rejected.
Required Documentation
Turnaround Time (TAT) 7 days	Test Utilization >7 Days
Reference Value Blood Group O = 0.48 - 2.00 U/mL Other Blood Groups = 0.60 - 2.40 U/mL
Test Code RCOF	Methodology Latex Immunoassay
Testing Location SMH-Special Coagulation	Other Information Last Updated: June 06, 2019

Ristocetin Factor Activity

Test Name

Ristocetin Factor Activity (Ristocetin Factor, RCOF)

Specimen Type / Requirements

Container Type = Blue Tube (Sodium Citrate)

Minimum Testing Volume = Full draw

9:1 Ratio (9 parts blood to 1 part anticoagulant)

Specimen Handling

Collection Instructions: Must indicate anticoagulant status when ordering to avoid delay.

Write your initials, date and time of collection on the collection label.

Transportation: In/Outpatients: Send whole citrated blood at room temperature as soon as possible. Referred-in: Send frozen citrated plasma on dry ice. All samples must be sent to the Core Laboratory.

Stability: Specimens are stable for 4 hours post collection at room temperature. Specimens which are not tested within 4 hours can be double-spun to remove the citrated plasma. The citrated plasma is stable at -20°C for up to two weeks or -70°C for up to six months.

Sample Rejection Criteria:Clotted sample, grossly hemolyzed samples, Unlabeled or samples with insufficient quantity will be rejected.

Required Documentation

Turnaround Time (TAT)

7 days

Test Utilization

>7 Days

Reference Value

Blood Group O = 0.48 - 2.00 U/mL

Other Blood Groups = 0.60 - 2.40 U/mL

Test Code

RCOF

Methodology

Latex Immunoassay

Testing Location

SMH-Special Coagulation

Other Information

Last Updated: June 06, 2019