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The survival of premature infants improves significantly with gestational age, but long-term developmental issues persist. Ethical considerations are crucial when determining intensive care limits for extremely premature newborns.
Area of Science:
- Neonatalogy
- Perinatology
- Developmental Pediatrics
Background:
- The extreme limit of viability for premature infants is around 23-24 weeks of gestation, with survival rates increasing significantly with each week.
- At 25-26 weeks gestation (600g birth weight), 1-year survival is 50%, rising to 90% by 29 weeks.
Discussion:
- Approximately 20% of infants born before 27 weeks gestation experience motor, sensory, or intellectual sequelae.
- Despite advances leading to a 20-fold increase in normally surviving infants over two decades, the absolute number of children with disabilities has risen due to increased survival rates.
Key Insights:
- Survival probability at 1 year: 50% at 25-26 weeks, 60-80% at 27-28 weeks, and 90% at 29 weeks.
- Neonatal intensive care has improved outcomes, but long-term neurodevelopmental deficits remain a concern for extremely preterm infants.
- Ethical debates continue regarding the appropriate threshold for initiating intensive care for newborns, balancing survival with quality of life.
Outlook:
- Future research should focus on improving neurodevelopmental outcomes for extremely premature infants.
- Continued advancements in neonatal care are expected to further enhance survival rates.
- Establishing clear ethical guidelines for neonatal intensive care is essential for managing extremely preterm births.
Abstract:
The extreme limit of viability in premature infants, related to pulmonary maturity, cerebral structuration and the capacity to maintain homeostasis and metabolic functions is approximately 23-24 weeks of gestation. Currently at 25-26 weeks, with a birth-weight of 600 g, the probability of survival at 1 year is 50%; at 27-28 weeks 1 year survival rises to 60-80% and at 29 weeks reaches 90%. Motor, sensorial and intellectual or psychological sequellae are seen in approximately 20% of the infants born after less than 27 weeks gestation. Over the last twenty years the gain in the number of normal surviving infants has been multiplied by 20, and therefore, despite a decrease in the percentage of children with sequellae, the total number of handicapped children has also increased. From an ethical point of view, every newborn, whatever his birthweight, gestational age or clinical distress is a human being and has a right to the preservation of his potential for survival. Although current legislation sets a limit of 22 weeks or 500 g for declaration of birth, the real question is to determine the medically ethical limit for intensive care.