Each participant started by preoxygenation of 100% oxygen for 3 minutes. Then, parturients breath 1% of sevoflurane in mixture of oxygen and air (FIO2 0.5) by tight face mask with a gas flow of 6 L/min. Values of inspired (FI) and end-tidal (FET) concentrations of sevoflurane, oxygen and respiratory rate (RR) measured by end-tidal carbon dioxide (EtC02) were monitored continuously and recorded at 30 seconds intervals by a gas analyzer.
30 seconds after stating inhalation sedation, the obstetrician will be asked to start the procedure. HR, FI and FET concentration of sevoflurane, Sp02 and EtC02 will be recorded at 30-s interval during ECV. Non-invasive BP will be recorded every one minute. Duration of ECV in addition to level of difficulty estimated by obstetrician will be recorded.
ECV considered successful when a cephalic presentation, confirmed by ultrasound scan, achieved.

If the parturient is assigned to the control (nonintervention) group, the participants will not receive any medications neither tocolytics nor analgesics as the routine care in our hospital. However, the participants will be monitored throughout the procedure for vital signs and for pain scores as in the intervention group.

Version of Uterus

Each participant started by preoxygenation of 100% oxygen for 3minutes. Then, parturients breath 1% of sevoflurane in a mixture of oxygen and air (FIO2 0.5) by tight face mask with a gas flow of 6 L/min.
Thirty seconds after stating inhalation sedation, the obstetrician will be asked to start the procedure.The duration of ECV in addition to the level of difficulty estimated by obstetricians will be recorded. Usually, the duration of ECV does not exceed 10 minutes.
The intervention will be stopped if the woman reported severe pain, if version could not be achieved readily, or if prolonged fetal bradycardia, uterine bleeding or placental abruption occurred.
Parturient will be kept in Post Anesthesia Care Unit (PACU) for 45minutes. CTG will be monitored during PACU stay.

Sevoflurane

Sevoflurane and Success of External Cephalic Version (ECV)

Effect of Sevoflurane on the Success of External Cephalic Version for Breech Presentation

ECV considered successful when a cephalic presentation assessed by direct palpation of maternal abdominal wall by obstetrician and confirmed by ultrasound scan is achieved.

The visual analogous scale used for this study measures from 0-10 the intensity of the pain. Where, the scale is most commonly anchored by "no pain" (score of 0) and "pain as bad as it could be" or "worst imaginable pain" (score of 10).

The women's level of satisfaction with the procedure will be assessed using numerical rating scale (0 = completely dissatisfied, 10 = completely satisfied)

These complications include such as placental abruption, cord prolapse, abnormal cardiotocography, fetomaternal transfers and stillbirth

Possible adverse effects such as nausea, vomiting, drowsiness, hypotension and aspiration pneumonia.

breech presentation/hypoxia

Sevoflurane and Success of External Cephalic Version (ECV)

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