Population Pharmacokinetic Modeling of Fibrinogen in Patients With Congenital or Acquired -Chronic or Acute- Hypofibrinogenemia

Fibrinogen, a plasma-soluble protein synthesized by the liver, is the key substrate for the plasmatic blood coagulation, reaching a critically low plasma concentration earlier than other coagulation factors in case of bleeding. Fibrinogen Pharmacokinetics (PK) after single doses of fibrinogen concentrate (FC), using modeling approaches, has only been evaluated in congenital afibrinogenaemic patients. The aims of this study are to extend the modeling process to characterize the fibrinogen PK in patients with acquired -chronic (cirrhotic patients) or acute- hypofibrinogenemia (severe trauma or critical haermorrhage), showing endogenous production. Influencing factors of differences on the fibrinogen PK between sub-populations will be identified.