Gestational age-specific hematological patterns in preterm infants following necrotizing enterocolitis

Area of Science:

• Neonatalogy
• Pediatric Hematology
• Gastroenterology

Background:

• Necrotizing enterocolitis (NEC) is a severe gastrointestinal emergency in preterm infants.
• Gestational age (GA) is a critical factor influencing infant physiology and response to illness.
• Understanding GA-specific responses to NEC is vital for tailored clinical management.

Purpose of the Study:

• To investigate gestational age (GA)-specific hematological and transfusion response patterns in preterm infants following necrotizing enterocolitis (NEC).
• To compare hematological parameters and transfusion needs across different GA groups diagnosed with NEC.

Main Methods:

• Retrospective study design.
• Comparison of hematological and transfusion data in three GA groups: Group A (≤28 weeks), Group B (28-32 weeks), and Group C (>32 weeks).
• Analysis of white blood cell count, platelet counts, absolute neutrophil, monocyte, and lymphocyte counts, blood transfusion data, and odds of surgical NEC.

Main Results:

• Infants in Group A (≤28 weeks) exhibited significantly higher WBC counts, thrombocytopenia, elevated absolute neutrophil and monocyte counts, and lower absolute lymphocyte counts post-NEC onset.
• Group A infants received more blood transfusions before NEC onset (59.8% vs. 30.0%, p=0.007) and had higher odds of surgical NEC (OR 3.39, p=0.02) compared to Group C.
• Increased absolute lymphocyte count on the day of and 24 hours post-NEC onset was associated with lower odds of surgical NEC.

Conclusions:

• Infants born extremely preterm (Group A) demonstrate significantly different hematological response patterns following NEC compared to infants with higher gestational ages (Groups B and C).
• These distinct patterns underscore the importance of considering GA in the management and prognosis of NEC.
• Hematological markers, particularly lymphocyte counts, may offer insights into NEC severity and surgical risk.