OBJECTIVE: To determine minimum plasma concentrations of the antifibrinolytic agents tranexamic acid (TEA) and ε-aminocaproic acid (EACA) needed to completely inhibit fibrinolysis in canine and human plasma after induction of hyperfibrinolysis. SAMPLES: Pooled citrated plasma from 7 dogs and commercial pooled citrated human plasma. PROCEDURES: Concentrations of EACA from 0 μg/mL to 500 μg/mL and of TEA from 0 μg/mL to 160 μg/mL were added to pooled citrated canine and human plasma. Hyperfibrinolysis was induced with 1,000 units of tissue plasminogen activator/mL, and kaolin-activated thromboelastography was performed in duplicate. The minimum concentrations required to completely inhibit fibrinolysis 30 minutes after maximum amplitude of the thromboelastography tracing occurred were determined. RESULTS: Minimum plasma concentrations necessary for complete inhibition of fibrinolysis by EACA and TEA in pooled canine plasma were estimated as 511.7 μg/mL (95% confidence interval [CI], 433.2 to 590.3 μg/mL) and 144.7 μg/mL (95% CI, 125.2 to 164.2 μg/mL), respectively. Concentrations of EACA and TEA necessary for complete inhibition of fibrinolysis in pooled human plasma were estimated as 122.0 μg/mL (95% CI, 106.2 to 137.8 μg/mL) and 14.7 μg/mL (95% CI, 13.7 to 15.6 μg/mL), respectively. CONCLUSIONS AND CLINICAL RELEVANCE: Results supported the concept that dogs are hyperfibrinolytic, compared with humans. Higher doses of EACA and TEA may be required to fully inhibit fibrinolysis in dogs.
OBJECTIVE: To determine minimum plasma concentrations of the antifibrinolytic agents tranexamic acid (TEA) and ε-aminocaproic acid (EACA) needed to completely inhibit fibrinolysis in canine and human plasma after induction of hyperfibrinolysis. SAMPLES: Pooled citrated plasma from 7 dogs and commercial pooled citrated human plasma. PROCEDURES: Concentrations of EACA from 0 μg/mL to 500 μg/mL and of TEA from 0 μg/mL to 160 μg/mL were added to pooled citrated canine and human plasma. Hyperfibrinolysis was induced with 1,000 units of tissue plasminogen activator/mL, and kaolin-activated thromboelastography was performed in duplicate. The minimum concentrations required to completely inhibit fibrinolysis 30 minutes after maximum amplitude of the thromboelastography tracing occurred were determined. RESULTS: Minimum plasma concentrations necessary for complete inhibition of fibrinolysis by EACA and TEA in pooled canine plasma were estimated as 511.7 μg/mL (95% confidence interval [CI], 433.2 to 590.3 μg/mL) and 144.7 μg/mL (95% CI, 125.2 to 164.2 μg/mL), respectively. Concentrations of EACA and TEA necessary for complete inhibition of fibrinolysis in pooled human plasma were estimated as 122.0 μg/mL (95% CI, 106.2 to 137.8 μg/mL) and 14.7 μg/mL (95% CI, 13.7 to 15.6 μg/mL), respectively. CONCLUSIONS AND CLINICAL RELEVANCE: Results supported the concept that dogs are hyperfibrinolytic, compared with humans. Higher doses of EACA and TEA may be required to fully inhibit fibrinolysis in dogs.
Authors: N E Sigrist; N Hofer-Inteeworn; R Jud Schefer; C Kuemmerle-Fraune; M Schnyder; A P N Kutter Journal: J Vet Intern Med Date: 2017-05-07 Impact factor: 3.333
Authors: Roberto Picetti; Haleema Shakur-Still; Robert L Medcalf; Joseph F Standing; Ian Roberts Journal: Blood Coagul Fibrinolysis Date: 2019-01 Impact factor: 1.276
Authors: Håkon Kvåle Bakke; Ole Martin Fuskevåg; Erik Waage Nielsen; Erik Sveberg Dietrichs Journal: Scand J Trauma Resusc Emerg Med Date: 2021-12-18 Impact factor: 2.953