The 4Ts Score is a clinical scoring system to differentiate patients with HIT from those with other causes of thrombocytopenia.

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The 4T score calculator checks for signs typical of heparin-induced thrombocytopenia (HIT) and the probability of its diagnosis. 💉. We won't be just calculating; we'll also talk about the elements of 4T, HIT criteria, as well as platelet nadir and other definitions useful in HIT medical evaluation & HIT diagnosis. Let's start the ride!

Methods: The pretest clinical scoring system, the 4 T’s , was used to classify 100 consecutive patients referred for possible HIT in one hospital (Hamilton General Hospital, HGH) into high, intermediate, and low probability groups.

Table I. 4T score for pretest probability of HIT Clinical Feature Score 2 1 0 Thrombocytopenia Platelet count decrease >50% and platelet nadir >20 x 109/L Platelet count decrease of 30-50% or platelet nadir 10-19 x 109/L Platelet count fall <30% or platelet nadir <10 x 109/L Timing of onset Clear onset between days 5-14, or platelet

Objectives: The American Society of Hematology's 4T scoring system is a validated tool to assess a patient's probability of having heparin-induced thrombocytopenia (HIT) before testing is...

1) is a pretest scoring system for HIT that was developed to improve and standardize clinical diagnosis. It incorporates 4 typical features of HIT: (1) magnitude of thrombocy-topenia; (2) timing of thrombocytopenia with respect to heparin e.

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2014年8月25日 · This post will cover the 4 T's that are used to quantify this probability and guide clinical decision-making. Both clinical and laboratory evidence need to be considered when there is a suspicion for HIT.