Can a single lactate value predict adverse outcome in critically ill newborn?

Area of Science:

• Neonatal Medicine
• Biochemistry

Background:

• Perinatal asphyxia can lead to severe multi-organ dysfunction and mortality in newborns.
• Early identification of at-risk neonates is crucial for timely intervention.

Purpose of the Study:

• To evaluate lactic acidosis as an early predictor of adverse outcomes in term neonates following perinatal asphyxia.
• To determine the prognostic value of lactate levels for hypoxic-ischemic encephalopathy and mortality.

Main Methods:

• Lactate concentrations were measured in capillary blood samples of 55 term newborns with post-asphyxial hypoxic-ischemic encephalopathy within 1-6 hours of birth.
• A control group of 36 healthy term neonates was included for comparison.

Main Results:

• Elevated lactate levels were observed in neonates with hypoxic-ischemic encephalopathy compared to controls.
• Lactate concentration > 8.7 mmol/L predicted hypoxic-ischemic encephalopathy stage II/III with 80% sensitivity and 82% specificity.
• Lactate level > 9.95 mmol/L predicted mortality with 75% sensitivity and 74.4% specificity.

Conclusions:

• Lactate concentration measurement is a valuable tool for diagnosing metabolic disorders and ischemic damage in term newborns with perinatal asphyxia risk factors.
• Lactate levels can help identify severe clinical forms of hypoxic-ischemic encephalopathy and predict fatal outcomes.