The investigators are trying to investigate the coagulation status of idiopathic (immune) thrombocytopenic purpura patients by measuring the platelet count, coagulation battery, von Willebrand factor level, thromboelastography.
In patients with chronic coagulation disorder, laboratory model and clinical data have shown evidence for a rebalanced hemostasis. Previous study showed that the platelet count may not predict the risk of bleeding since the platelet count is not an indicator of platelet function. Thromboelastography may be the choice of investigation when platelet function is in question especially in patients with idiopathic (immune) thrombocytopenic purpura (ITP). Previous study have shown that maximum clot formation is the most important thromboelastography parameter in predicting bleeding in ITP patients that makes thromboelastography superior to other hemostatic tests. The investigators are trying to evaluate the rebalanced hemostasis in patients with ITP by comparing the value of platelet count, von Willebrand factor antigen level, and thromboelastography parameters.
Study Type
OBSERVATIONAL
Enrollment
20
Samsung Medical Center
Seoul, South Korea
maximum clot formation
thromboelastography parameters performed within 3 hours of blood sampling
Time frame: within 3 hour of blood sampling
platelet count
platelet count
Time frame: within 1 hours of blood sampling
Coagulation battery results
prothrombin time (%, second, INR) activated partial thromboplastin time (sec) fibrinogen level (mg/dL)
Time frame: within 1 hour after blood sampling
von Willebrand factor antigen
von Willebrand factor antigen level
Time frame: within 3 hours of blood sample
clotting time
clotting time of Thromboelastography
Time frame: within 3 hours of blood sampling
alpha angle
alpha angle of thromboelastography parameter
Time frame: within 3 hours of blood sample
A10, A15, A20, A25
amplitude 10, 15, 20, 25 minutes (mm) of thromboelastography parameter
Time frame: within 3 hours of blood sampling
LY 60
maximum amplitude at 60 minutes of thromboelastography parameter
Time frame: within 3 hours of blood sampling
CLI
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
clot lysis index of thromboelastography parameter
Time frame: within 3 hours of blood sampling
Maximum lysis
Maximum lysis of thromboelastography parameter
Time frame: within 3 hours of blood sampling