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Objective—To evaluate the effects of various storage conditions on one-stage prothrombin time (OSPT), activated partial thromboplastin time (APTT), and fibrinogen concentration of canine plasma collected for transfusion.

Sample Population—Plasma from 9 dogs.

Procedure—Whole blood was collected from dogs by means of jugular venipuncture and centrifuged at 7,300 × g for 20 minutes at 0 C. A plasma extractor was then used to generate plasma. Aliquots of plasma were collected in segments of plastic tubing and in microcentrifuge tubes, and plasma collection bags, tubing segments, and microcentrifuge tubes were immediately frozen at –30 C. Additional tubing segments and microcentrifuge tubes were stored at 2 C. After 1 week of storage, all samples were thawed, and OSPT, APTT, and fibrinogen concentration were measured. Collection bags and microcentrifuge tubes were refrozen at –30 C, and values were measured again 30 days after blood collection.

Results—Values for OSPT, APTT, and fibrinogen concentration did not vary significantly with storage time, temperature, or container.

Conclusions and Clinical Relevance—Results suggested that storage for up to 30 days and at 2 C versus –30 C did not have any significant effect on hemostatic parameters of canine plasma obtained for transfusion. (Am J Vet Res 2001;62:734–735)

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in American Journal of Veterinary Research