Thrombocytopenia in Critically Ill Children: A Review for Practicing Clinicians

Area of Science:

• Pediatric Intensive Care
• Hematology
• Critical Care Medicine

Background:

• Thrombocytopenia is common in critically ill children, indicating potential organ dysfunction.
• Causes are multifactorial, often involving decreased production, sequestration, or increased destruction/consumption of platelets.

Purpose of the Study:

• To review causes, identification, and treatments of thrombocytopenia in acutely ill children.
• To focus on septic patients and compare disseminated intravascular coagulation (DIC) with the thrombotic microangiopathic spectrum (TMA).

Main Methods:

• Literature review summarizing mechanisms and clinical presentations.
• Comparative analysis of DIC and TMA, including thrombocytopenia-associated multiorgan failure (TAMOF).
• Discussion of other etiologies like HLH/MAS, immune thrombocytopenia, and dilutional thrombocytopenia.

Main Results:

• Increased destruction or consumption is the most common mechanism of thrombocytopenia.
• DIC and TMA are key differential diagnoses in critically ill children with low platelet counts.
• Platelet transfusion thresholds and complications are analyzed.

Conclusions:

• Understanding the diverse causes of thrombocytopenia is crucial for effective management in pediatric intensive care.
• Timely identification and appropriate treatment, including consideration of specific syndromes like DIC and TMA, are vital.
• Evidence-based guidelines for platelet transfusions are essential to optimize outcomes and minimize risks.