Cooling for newborns with hypoxic ischaemic encephalopathy

Area of Science:

• Neonatal Medicine
• Perinatal Research
• Neuroscience

Background:

• Pilot studies in newborns suggest mild hypothermia post-peripartum hypoxia-ischaemia may reduce neurological issues.
• Hypothermia is being explored as a neuroprotective strategy for newborns experiencing birth asphyxia.

Purpose of the Study:

• To evaluate if therapeutic hypothermia reduces mortality and long-term neurodevelopmental disability in asphyxiated newborn infants.
• To assess the safety and side effects of therapeutic hypothermia in this vulnerable population.

Main Methods:

• Systematic review of randomized controlled trials (RCTs) using standard Cochrane Neonatal Review Group search strategies.
• Included RCTs compared therapeutic hypothermia with normothermia in term newborns with hypoxic-ischaemic encephalopathy.
• Data extraction and quality assessment by three independent reviewers; meta-analysis of dichotomous and continuous data.

Main Results:

• Two RCTs involving 50 term infants with moderate/severe encephalopathy were analyzed.
• Therapeutic hypothermia did not show a significant effect on the combined outcome of death or major neurodevelopmental disability.
• No adverse effects were detected in short-term medical outcomes or early neurodevelopmental indicators.

Conclusions:

• Current evidence from two small RCTs is insufficient to establish the safety or efficacy of therapeutic hypothermia.
• Further well-designed randomized controlled trials are necessary to adequately assess therapeutic hypothermia for hypoxic-ischaemic encephalopathy.
• The potential benefits and harms of therapeutic hypothermia in newborns require more robust investigation.