Rebalanced haemostasis: why INR misleads, when to give products, viscoelastic testing, and VTE prophylaxis.
At the bedside
- 1
Do not correct INR prophylactically
No FFP before low-risk procedures (paracentesis, thoracocentesis, central lines with ultrasound) regardless of INR.
- 2
High-risk procedures
Assess case by case; viscoelastic tests (TEG/ROTEM) reduce product use. Platelets if < 50 × 10⁹/L for high-risk procedures (or thrombopoietin agonists electively).
- 3
Active bleeding
Treat portal hypertension first (vasoactive, endoscopy); correct fibrinogen (< 100-120 mg/dL: cryoprecipitate), platelets > 50, guided by viscoelastic testing; restrictive RBC transfusion.
- 4
Vitamin K
10 mg IV if cholestasis, malnutrition or antibiotics; little effect in parenchymal failure.
- 5
Correct triggers
Infection, AKI/uraemia, hypothermia, acidosis and hypocalcaemia worsen bleeding.
- 6
VTE prophylaxis
Give LMWH prophylaxis to immobile cirrhotic ICU patients without active bleeding or very low platelets; a high INR is not protective.
Suspected deficiency
Vitamin K1 (phytomenadione)
- Dose
- 10 mg slowly
Bleeding with low fibrinogen
Cryoprecipitate
- Dose
- 1 unit/10 kg (about 8-10 units)
- Target
- Fibrinogen > 120 mg/dL (or viscoelastic target)
References
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Pathophysiology
Reduced synthesis of factors II, V, VII, IX, X, XI and of protein C/S and antithrombin, with high factor VIII and vWF and low ADAMTS13, produces a fragile balance that can tip to bleeding (infection, uraemia) or thrombosis.
Evidence
- EASL 2022 bleeding and thrombosis guideline: avoid prophylactic correction of INR; use viscoelastic testing; give VTE prophylaxis [EASL 2022].
Controversies
- Platelet and fibrinogen thresholds before high-risk procedures.
🇮🇳 India notes
- TEG/ROTEM are available mainly in tertiary centres; where unavailable, fibrinogen level and platelet count guide therapy.
- Cryoprecipitate and single-donor platelets are often available only in blood banks of larger hospitals.
References
- 1
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