A 62-year-old man with a 10-year history of chronic liver disease (Child-Pugh Class C) presents with spontaneous bleeding from esophageal varices. His prothrombin time is prolonged (INR 3.2), and platelet count is 65,000/μL. Which investigation is most appropriate to assess the hemostatic reserve and guide transfusion strategy in this patient?
A. Platelet aggregation studies
B. Thromboelastography (TEG) or rotational thromboelastometry (ROTEM)
C. Fibrinogen level measurement
D. Mixing study (1:1 mixture of patient and normal plasma)
Explanation
Hemostatic Assessment in Cirrhosis: Role of Viscoelastic Testing
Key Point
Thromboelastography (TEG) and rotational thromboelastometry (ROTEM) provide real-time, whole-blood assessment of hemostasis and are superior to conventional coagulation tests (PT/INR, aPTT) for guiding transfusion in cirrhosis.
Why TEG/ROTEM is Correct
In cirrhosis, conventional coagulation tests (PT/INR) are prolonged due to:
Decreased synthesis of procoagulants (factors II, V, VII, X)
Decreased synthesis of anticoagulants (protein C, protein S)
Thrombocytopenia (due to hypersplenism and bone marrow suppression)
However, the hemostatic balance is often preserved because both procoagulant and anticoagulant pathways are impaired. TEG/ROTEM directly measures:
R time (reaction time): Initiation phase
K time & angle: Kinetics of clot formation
MA (maximum amplitude): Platelet contribution and clot strength
LY30 (lysis at 30 min): Fibrinolysis
High-YieldNEET PG
TEG/ROTEM-guided transfusion reduces unnecessary FFP/platelet transfusions and improves outcomes in cirrhotic patients with variceal bleeding compared to PT/INR-guided transfusion.
Clinical Pearl
A prolonged INR in cirrhosis does NOT necessarily indicate severe coagulopathy; TEG/ROTEM may show adequate clot formation despite elevated INR. This explains why many cirrhotic patients do not bleed despite INR >3.
Comparison of Hemostatic Tests in Cirrhosis
Table
Test
What It Measures
Utility in Cirrhosis
PT/INR
Extrinsic pathway
Prognostic marker; NOT useful for transfusion decisions
aPTT
Intrinsic pathway
Prolonged but not predictive of bleeding
Fibrinogen
Clotting factor
Often low; not sole indicator of hemostasis
Platelet count
Platelet number
Reduced by hypersplenism; does not reflect function
TEG/ROTEM
Whole-blood clot formation & lysis
Gold standard for guiding transfusion; reflects true hemostatic balance
Why Other Investigations Are Inadequate
Fibrinogen level: Often low in cirrhosis but does not reflect overall hemostatic capacity; FFP transfusion based on fibrinogen alone is not evidence-based.
Platelet aggregation studies: Assess platelet function but are not routinely used in acute bleeding; platelet count is more relevant.
Mixing study: Used to differentiate factor deficiency from inhibitor in prolonged aPTT; not applicable here and does not guide transfusion strategy in cirrhosis.
Practice similar questions
Sign up free to access AI-powered MCQ practice with detailed explanations and adaptive learning.
