The platelet count and its implications in sickle cell disease patients admitted for intensive care
Durjoy K. Shome, Ahmed Jaradat, Ahmed I. Mahozi, Ali S. Sinan, Ali Ebrahim, Mohammed Alrahim, Mohammad S. Ebraheem, Eman J. Mansoor, Kameela S. Majed, Sheikh A. Azeez Pasha
Acute physiology, chronic health evaluation II, multi-organ dysfunction score, platelets, sickle cell disease, thrombocytopenia
Citation Information :
Shome DK, Jaradat A, Mahozi AI, Sinan AS, Ebrahim A, Alrahim M, Ebraheem MS, Mansoor EJ, Majed KS, Azeez Pasha SA. The platelet count and its implications in sickle cell disease patients admitted for intensive care. Indian J Crit Care Med 2018; 22 (8):585-590.
Background and Aims: In sickle cell disease (SCD) patients admitted for intensive care, evaluation of platelet counts in different types of sickle cell complications and its prognostic relevance are not well-studied. Illuminating these aspects were the objectives of this study.
Materials and Methods: A chart review of 136 adult SCD patients consecutively admitted to our Intensive Care Unit (ICU) was done. The prognosis on day 1 was assessed by Acute Physiology and Chronic Health Evaluation (APACHE II) and multiple organ dysfunction scores (MODS). Receiver operating characteristic (ROC) curves evaluated the ability of platelet counts, MODS, and APACHE II scores to predict survival.
Results: The most common types of crises were severe pain (n = 53), acute chest syndrome (n = 40), and infection (n = 18); 17 patients were nonsurvivors. Platelet counts varied widely (range, 19–838 × 109/L) with thrombocytopenia (n = 30) and thrombocytosis (n = 11). Counts correlated directly with leukocytes and reticulocytes; inversely with lactate dehydrogenase, APACHE, and MODS scores. Areas under ROC curve for platelets, MODS, and APACHE scores to predict survival were 0.73, 0.85, and 0.93, respectively.
Conclusions: In severe sickle cell crisis thrombocytopenia is more common than thrombocytosis. In the ICU, day 1 platelet counts correlate inversely with prognostic scores and are significantly reduced in multi-organ failure and nonsurvivors. A platelet count above 175 × 109/L predicts patient survival with high specificity and positive predictive value but lacks sensitivity.
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