Plasminogen Antigen

Single-analyte tests

• Plasminogen Antigen 117340

  Plasma · Fasting not stated · Turnaround 3 - 5 days

  Method and collection

  Method

  Nephelometry

  Collection

  Citrated plasma samples should be collected by double centrifugation. Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.16 Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.17,18 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 (i.e., "butterfly"), in which case a discard tube should be used.19,20 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 No. 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 .

  Reference notes

  6.0–25.0 mg/dL

  Labcorp catalog page

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Single-analyte tests

• Plasminogen, Antigenic 5164

  Plasma · Fasting required · Turnaround Set up: Mon, Thurs (a.m.)

  Method and collection

  Method

  Fixed Time Nephelometry

  Preparation

  Overnight fasting is required

  Collection

  Use 3.2% sodium citrate (light blue-top) anticoagulant tube. Fill tube with venous blood and gently mix without shaking the tube. Centrifuge within 1 hour of blood draw at 1500 g for 10 minutes, preferably at 4° C. Remove plasma using plastic pipette and place into plastic tube and cap. Freeze immediately.

  Reference notes

  8-14 mg/dL

  Quest Diagnostics catalog page

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