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Specimen Collection Equip. –

Green topped
Green-Topped

• Contains sodium heparin, lithium heparin, or

ammonium heparin as the anticoagulant

• Light green or green-gray tubes are called plasma

barrier tubes

• Used for tests requiring plasma or for general

chemistry tests

• Heparin stops blood from clotting by inactivating

thrombin and thromboplastin