Reference values for coagulation time of dogs in Porto Alegre, RS, Brazil.

Background: Prothrombin time (PT) and activated partial thromboplastin time (PTT) are screening tests for coagulopathies in dogs.Both tests measure the clotting ability by the activation of different parts of the coagulation cascade.These tests vary widely in terms of reference parameters, mainly due the considerable diversity of reagents and analyzers available.In addition, there are many variati…