• Int J Obstet Anesth · Apr 1997

    Randomized Controlled Trial Clinical Trial

    A comparison of catheter vs needle injection of local anesthetic for induction of epidural anesthesia for cesarean section.

    • F J Husain, N L Herman, V R Karuparthy, K G Knape, and J W Downing.
    • Division of Obstetric Anesthesia, Department of Anesthesiology, University of Texas Health Science Center, San Antonio, Texas 78284, USA.
    • Int J Obstet Anesth. 1997 Apr 1; 6 (2): 101-6.

    AbstractIt is generally believed that bolus injections of local anesthetic through an epidural needle produce a more rapid onset of blockade, but at the expense of an increased incidence and severity of hypotension, whereas intermittent injections through a catheter take longer to achieve adequate anesthesia but with a lower risk of hypotension. The present study investigated two commonly used needle and catheter epidural injection techniques for differences in speed of onset of surgical anesthesia and incidence and severity of hypotension. Term parturients scheduled for elective cesarean section were randomized into two groups to receive epidural anesthesia with intermittent injection either through the epidural needle (n = 44) or via a previously placed catheter (n = 44). The incidence and severity of hypotension was similar in the two groups. No significant difference was found for the time to onset of surgical anesthesia. In the absence of benefits of needle injection, incremental catheter administration of local anesthetic with its multiple safety advantages is the technique of choice for induction of epidural anesthesia for cesarean section.

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