The ISTH DIC Score

The ISTH DIC Score

Introduction The ISTH DIC score is a diagnostic scoring system used to identify overt disseminated intravascular coagulation (DIC), a condition in which widespread activation of the clotting system consumes platelets and clotting factors faster than the body can...
The HAS-BLED Score

The HAS-BLED Score

Introduction The HAS-BLED score is a clinical prediction tool used to estimate a patient’s one-year risk of major bleeding while on oral anticoagulation, most commonly in the context of atrial fibrillation. It works by assigning one point (occasionally two) for...
The Wells Score for Pulmonary Embolism (PE)

The Wells Score for Pulmonary Embolism (PE)

Introduction The Wells score for PE is a clinical prediction tool used to estimate how likely a patient is to have a pulmonary embolism (PE) before ordering a blood test or imaging. It should not be confused with the Wells score for DVT, which is a separate tool built...
The 4Ts Score for Heparin-Induced Thrombocytopenia (HIT)

The 4Ts Score for Heparin-Induced Thrombocytopenia (HIT)

Introduction The 4Ts score is a bedside clinical prediction tool used to estimate the probability that a patient’s falling platelet count is caused by heparin-induced thrombocytopenia (HIT), rather than one of the many other, more common reasons platelets drop...
The ISTH-BAT (Bleeding Assessment Tool)

The ISTH-BAT (Bleeding Assessment Tool)

Introduction The ISTH-BAT (International Society on Thrombosis and Haemostasis Bleeding Assessment Tool) is a standardized questionnaire used to quantify a person’s lifetime bleeding history. Rather than relying on a clinician’s subjective impression of...
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