Coagulopathy in Cirrhosis
Shakira Laing
Background
- The liver produces most pro-coagulant factors (II, V, VII, IX, X, XI) and anticoagulants (protein C, S, antithrombin). Factor VIII and von Willebrand factor are produced by endothelial cells, not hepatocytes.
- Thrombocytopenia results from splenic sequestration (portal hypertension), decreased thrombopoietin production, and bone marrow suppression.
- Cirrhosis causes complex hemostatic changes affecting both pro- and anticoagulant pathways. Current understanding recognizes a rebalanced hemostatic state rather than an overall bleeding tendency.
Evaluation
- INR/PT and PTT poorly predict bleeding risk in cirrhosis and should not guide transfusion decisions.
- Viscoelastic testing (TEG/ROTEM) provides a more comprehensive assessment but lacks validated transfusion thresholds.
Preprocedural Prophylaxis
- Low-risk procedures (paracentesis, thoracentesis, variceal banding): No routine blood products or specific INR/platelet cutoffs required
- Routine preprocedural testing not recommended in stable cirrhosis with known baseline abnormalities
Active Bleeding
- Vitamin K: Not routinely recommended; does not improve outcomes in cirrhotic coagulopathy per 2025 ACG guidelines. (can be considered if thought to be from nutritional deficiency)
- FFP: Avoid routine use; only consider as part of balanced massive transfusion or if TEG suggests benefit (increases portal pressure, contains anticoagulants)
- Cryoprecipitate: If fibrinogen 120 mg/dL
- Platelets: No specific target for bleeding; consider >50,000 for high-risk procedures or active bleeding
- Preferred agents: Low-volume cryoprecipitate or 4-factor prothrombin complex concentrate over FFP
TEG-Guided Transfusion
- Reduces blood product use without increasing bleeding risk
- Specific cutoffs not standardized; institutional protocols vary
- One validated approach: FFP if R-time >40 min; platelets if MA 30 mm
VTE Prophylaxis
- Recommended for hospitalized cirrhotic patients meeting standard VTE prophylaxis criteria
- Thrombocytopenia and elevated INR are not absolute contraindications
- Relative contraindications: Active hemorrhage, recent variceal bleeding (before healing), severe thrombocytopenia (<50,000) - use clinical judgment
- Preferred agent: LMWH or fondaparinux over UFH (Unless patient has fluctuating creatinine/AKI)