Korean J Anesthesiol.  2008 May;54(5):524-530. 10.4097/kjae.2008.54.5.524.

The Effect of Isoflurane and Sevoflurane on Maternal Awareness under General Anesthesia for Cesarean Section

• Chun EH
• Kim JH
• Baik HJ
• Kim YJ

• KMID: 2236548
• DOI: http://doi.org/10.4097/kjae.2008.54.5.524

Abstract

BACKGROUND: It is hard to choose suitable plan of general anesthesia for cesarean section on guarantee of fetal safety and maternal awareness. We compared the effect of 0.8% isoflurane with that of 1.25% sevoflurane on maternal awareness using isolation forearm technique and bispectral index.
METHODS
Thirty parturients presenting for elective cesarean section under general anesthesia were randomly assigned to receive either 0.8% isoflurane or sevoflurane 1.25% for maintenance by fetal expulsion. Maternal awareness monitoring was assessed by isolation forearm technique and bispectral index at 1 minute intervals.
RESULTS
Although bispectral index values after intubation 1 minute and 4 minutes were lower in sevoflurane group, no differences were detected in maternal awareness using isolation forearm technique between two groups. Postoperative recall was not detected in both groups. In neonatal outcome, there were no differences in Apgar scores. Acidity was significantly increased (P < 0.05) in umbilical vein gas analysis after sevoflurane administration but it was within normal limits.
CONCLUSIONS
The incidence of maternal awareness was high and there were no differences between two groups during cesarean section under general anesthesia.

Keyword

awareness; bispectral index; isoflurane; isolation forearm technique; sevoflurane

MeSH Terms

Anesthesia, General
Cesarean Section
Female
Forearm
Incidence
Intubation
Isoflurane
Methyl Ethers
Pregnancy
Umbilical Veins
Isoflurane
Methyl Ethers