Bleeding disorders may be due to inherited or acquired deficiencies of a clotting factor.
Methodology: Photometric Clot Detection
Specimen Requirements: 1 blue-top (citrate) tube (minumum: the remaining platelet poor plasma separated from 2.7 mL whole blood). Centrifuge blue-top within 60 minutes of colleciton. Separate plasma and FREEZE immediately. Send specimen frozen in plastic vial.
DO NOT REFRIGERATE. (May cause factor VII to be activated by the kallikrein system).
If using a butterfly collection set, fill a 1 mL waste tube prior to blue-top. This ensures full blood volume in blue-top.
Tube must be filled to capacity.
Draw specimen by vacuum. Do not overfill the tube.
Hemolyzed specimens are not acceptable.
If collecting multiple factor studies, draw each factor in separate tube.
Analytical Time: 3 days
Days Set Up: Monday through Friday