Problems with definitions and classifications of newborn encephalopathy

Area of Science:

• Neonatal neurology
• Pediatric critical care

Background:

• Established classifications of newborn encephalopathy often assume known etiologies like hypoxic-ischemic events.
• There is a lack of definitive evidence linking most newborn encephalopathy cases to specific phenomena.

Purpose of the Study:

• To advocate for the use of descriptive terms like "neonatal encephalopathy" or "newborn encephalopathy".
• To review existing qualitative and quantitative grading schemes for newborn encephalopathy.
• To discuss the limitations of current grading systems and the ongoing pursuit of an ideal scheme.

Main Methods:

• Literature review of existing classification systems and grading schemes for newborn encephalopathy.
• Critical analysis of the etiological assumptions in current classifications.
• Discussion of the strengths and weaknesses of various grading methodologies.

Main Results:

• The terms "neonatal encephalopathy" or "newborn encephalopathy" are preferred due to uncertain etiologies.
• Existing grading schemes, both qualitative and quantitative, are presented.
• Identified correctable limitations within current grading schemes are discussed.

Conclusions:

• The current classification of newborn encephalopathy may overstate etiological certainty.
• A universally accepted and ideal grading scheme for newborn encephalopathy has not yet been achieved.
• Further development is needed to create a more accurate and comprehensive grading system.