Neonatal serum cortisol suppression by etomidate compared with thiopentone, for elective caesarean section

Area of Science:

• Anesthesiology
• Neonatal Medicine
• Endocrinology

Background:

• Neonatal anesthesia requires careful consideration of drug effects on stress hormone levels.
• Etomidate and thiopentone are commonly used anesthetic agents.
• Understanding their impact on neonatal serum cortisol is crucial for patient safety.

Purpose of the Study:

• To compare the effects of intravenous etomidate and thiopentone on neonatal serum cortisol levels.
• To evaluate the neonatal stress response following maternal anesthesia during caesarean section.

Main Methods:

• A randomized study involving 22 healthy neonates undergoing elective caesarean section.
• Two groups received either etomidate (0.3 mg/kg) or thiopentone (4 mg/kg) intravenously.
• Serum cortisol levels were measured in umbilical cord blood and heel prick samples at 1 hour post-delivery.

Main Results:

• No significant difference in serum cortisol levels was observed in umbilical cord blood between the etomidate and thiopentone groups.
• Neonates exposed to etomidate exhibited significantly lower serum cortisol levels at 1 hour post-delivery compared to the thiopentone group (P < 0.001).
• Clinical status of the neonates did not differ significantly between the two groups.

Conclusions:

• Intravenous etomidate administration during caesarean section is associated with a significant suppression of neonatal serum cortisol levels one hour after birth.
• Thiopentone did not demonstrate the same suppressive effect on neonatal cortisol.
• Further research is warranted to explore the long-term implications of etomidate-induced cortisol suppression in neonates.