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The Combination of the Lactate Dehydrogenase/Hemoglobin Ratio with the PLASMIC Score Facilitates Differentiation of TTP from Septic DIC Without Identification of Schistocytes. | LitMetric

AI Article Synopsis

  • Differentiating between thrombotic thrombocytopenic purpura (TTP) and septic disseminated intravascular coagulation (DIC) is crucial for timely treatment, particularly plasma exchange, which can be lifesaving.
  • A retrospective analysis of 48 patient records indicated that while the PLASMIC score (which assesses multiple laboratory factors) can be helpful, it has limitations, with some patients displaying similar scores in both conditions.
  • The LDH/Hb ratio emerged as the most effective measure for distinguishing TTP from septic DIC, with a specific cutoff value that can aid in identifying patients needing urgent intervention.

Article Abstract

In some cases, differentiating thrombotic thrombocytopenic purpura (TTP) from septic disseminated intravascular coagulation (DIC) without measuring ADAMTS13 activity is critical for urgent lifesaving plasma exchange. To investigate whether PLASMIC score without identifying the presence of schistocytes, D-dimer, fibrin/fibrinogen degradation products (FDP), FDP/D-dimer ratio, prothrombin time-international normalized ratio (PT-INR), lactate dehydrogenase (LD), hemoglobin (Hb), and LD/Hb ratio are useful in differentiating patients with TTP from those with septic DIC. Retrospective analysis was conducted on the medical records of the patients with septic DIC (32 patients) or TTP (16 patients). The PLASMIC score and other laboratory measurements all were helpful in differentiating TTP from septic DIC. When dichotomized between high risk (scores 6-7) and intermediate-low risk (scores 0-5), the PLASMIC score predicted TTP with a sensitivity of 75.0% and a specificity of 100%. However, 4 of 16 patients with TTP and 19 of 32 patients with septic DIC showed comparable PLASMIC scores of 4 or 5, making it difficult to distinguish between the two by PLASMIC score alone. Among the measurements examined, the LDH/Hb ratio was the most useful for differentiation. Receiver operating characteristic analysis of the LD/Hb ratio for predicting TTP revealed a cutoff of 53.7 (IU/10 g) (sensitivity 0.94, specificity 0.91). If the LD/Hb ratio was less than 53.7, it was unlikely that the patient had TTP. A combination of the LD/Hb ratio and the PLASMIC score may be useful for distinguishing between TTP and DIC and identifying patients who need rapid plasma exchange or caplacizumab administration.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10588405PMC
http://dx.doi.org/10.1177/10760296231207629DOI Listing

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