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Heart Disease and Stroke Risk Profile
C-reactive protein, cardiac; fibrinogen activity; lipoprotein (a); von Willebrand factor antigen
See individual tests.
Serum and plasma, frozen
1 mL serum and 2 mL plasma
Red-top tube or gel-barrier tube and blue-top (sodium citrate) tube or lavender-top (EDTA) tube
Do not draw from an arm with a heparin lock or heparinized catheter.
Citrated plasma samples should be collected by double centrifugation. Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.1 Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.2,3 The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anticoagulant with the blood. A discard tube is not required prior to collection of coagulation samples, except when using a winged blood collection device (ie, "butterfly"), in which case a discard tube should be used.4,5 When noncitrate tubes are collected for other tests, collect sterile and nonadditive (red-top) tubes prior to citrate (blue-top) tubes. Any tube containing an alternate anticoagulant should be collected after the blue-top tube. Gel-barrier tubes and serum tubes with clot initiators should also be collected after the citrate tubes. Centrifuge for 10 minutes and carefully remove 2/3 of the plasma using a plastic transfer pipette, being careful not to disturb the cells. Deliver to a plastic transport tube, cap, and recentrifuge for 10 minutes. Use a second plastic pipette to remove the plasma, staying clear of the platelets at the bottom of the tube. Transfer the plasma into a LabCorp PP transpak frozen purple tube with screw cap (LabCorp N° 49482). Freeze immediately and maintain frozen until tested. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Please print and use the Volume Guide for Coagulation Testing to ensure proper draw volume.
Refrigerate serum. Freeze plasma.
State patient's sex on the request form. If the patient's hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted. Refer to Coagulation Collection Procedures for directions.
|Order Code||Order Code Name||Order Loinc||Result Code||Result Code Name||UofM||Result LOINC|
|500140||Heart Disease/Stroke Risk||120190||Lipoprotein (a)||nmol/L||43583-4|
|500140||Heart Disease/Stroke Risk||120768||C-Reactive Protein, Cardiac||mg/L||30522-7|
|500140||Heart Disease/Stroke Risk||001702||Fibrinogen Activity||mg/dL||3255-7|
|500140||Heart Disease/Stroke Risk||086280||von Willebrand Factor (vWF) Ag||%||27816-8|