Sharpe EE, et al. - Via this retrospective analysis utilizing electronic medical records, researchers focused on the need for an additional anesthetic intervention after single injection spinal analgesia for labor in women. They recorded patient and block features and patient outcomes. They found single injection spinal blocks for labor were received by 428 patients and an additional anesthetic was required in 60 (14.0%), either for labor analgesia (n=49) or an unexpected procedure (n=11). An increased risk of requiring an additional anesthetic intervention was reported in relation to parity of zero (nulliparous), a low cervical dilation at the time of the spinal injection, and induction of labor status. The evidence generated in this study indicates that single injection spinal anesthesia may be used for multiparous women with spontaneous labor and more advanced cervical dilation.