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Influence of a prolonged lateral position on induction of spinal anesthesia for cesarean delivery: a randomized controlled trial.

06:00 EDT 14th March 2012 | BioPortfolio

Summary of "Influence of a prolonged lateral position on induction of spinal anesthesia for cesarean delivery: a randomized controlled trial."


BACKGROUND:
Maternal hypotension occurs commonly during cesarean delivery under spinal anesthesia. We evaluated whether hypotension due to aortocaval compression could be prevented by maintaining a lateral position after an intrathecal injection.
METHODS:
Eighty-six women undergoing elective cesarean delivery were enrolled. Spinal anesthesia was conducted in the right lateral position using 8 mg of hyperbaric bupivacaine and 15 µg of fentanyl. Patients were randomly assigned to maintain the right lateral position for 6 min before assuming the wedged supine position (group L), or to assume the wedged supine position immediately after the spinal injection (group S). Hypotension was defined as a decrease in mean arterial pressure to <80% of baseline. Ephedrine was given if blood pressure decreased to <70% of baseline. The incidence of hypotension and nausea, ephedrine requirement, maximal block height, and neonatal outcomes were evaluated.
RESULTS:
No significant between-group differences were observed in the lowest blood pressure, total ephedrine dose, or incidence of hypotension or nausea. Onset of hypotension was delayed (6±2 vs. 10±3 min, P<0.001), and the sensory block level was more cephalad in group L than in group S (T2 [C8-T5] vs. T4 [T1-T6], P=0.001). Apgar scores did not differ between the groups.
CONCLUSION:
During spinal anesthesia for elective cesarean delivery, maintaining the lateral position for 6 min after an intrathecal injection of hyperbaric bupivacaine resulted in a more gradual and higher cephalad sensory block, without an increase in the incidence of maternal hypotension.

Affiliation

Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea - oay1@snubh.org.

Journal Details

This article was published in the following journal.

Name: Minerva anestesiologica
ISSN: 1827-1596
Pages:

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