Neonatal stress reactivity and cortisol

Area of Science:

• Neonatal physiology
• Pediatric endocrinology
• Stress response research

Background:

• Adrenocortical responses, particularly cortisol levels, are recognized indicators of the stress response in both term and preterm infants.
• There is ongoing debate and conflicting evidence regarding the utility of cortisol measurements for diagnosing stress in the neonatal intensive care unit (NICU) environment.

Purpose of the Study:

• To review the concept of stress and stress response development in neonates within the NICU setting.
• To provide a comprehensive literature review on cortisol production in term and preterm neonates.
• To present a model of neonatal stress response and discuss its implications for clinical caregiving.

Main Methods:

• Comprehensive literature search on neonatal stress and cortisol production.
• Analysis of existing data on adrenocortical responses in term and preterm infants.
• Development of a conceptual model for neonatal stress response.

Main Results:

• Cortisol levels are valid indicators of the stress response in neonates, including preterm infants.
• Significant conflict exists in the literature regarding the diagnostic application of cortisol levels in the NICU.
• A model illustrating neonatal stress response pathways and influencing factors is proposed.

Conclusions:

• Understanding neonatal stress response is crucial for appropriate caregiving in the NICU.
• Further research is needed to clarify the role of cortisol as a diagnostic tool for stress in neonates.
• The proposed stress response model offers a framework for improving care practices for infants in stressful environments.