Regional anesthesia
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Regional anesthesia · Jan 1992
Randomized Controlled Trial Clinical TrialEffect of subarachnoid morphine on the incidence of spinal headache.
The addition of fentanyl to hyperbaric local anesthetics has been shown to reduce the incidence of post dural puncture headache in the obstetric patient. This study was undertaken to evaluate the effects of subarachnoid morphine on the incidence of headache. ⋯ It is concluded from our study that subarachnoid morphine did not decrease the incidence of post dural puncture headache in the obstetric patient.
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Regional anesthesia · Sep 1991
Randomized Controlled Trial Clinical TrialEpidural butorphanol augments lidocaine sensory anesthesia during labor.
To determine the efficacy and safety of epidural butorphanol combined with lidocaine, 50 healthy parturients were studied during labor and delivery. All patients received a test dose of 3 ml 1.5% lidocaine with 1:200,000 epinephrine. Patients were then randomly assigned to receive 7 ml of one of two epidural regimens in a double-blind fashion: Group 1 patients received 1.5% lidocaine plus 1 mg butorphanol plus 1:300,000 epinephrine; Group 2 patients received 1.5% lidocaine plus 1:300,000 epinephrine. ⋯ There were no difference between groups in duration of first and second stages of labor, method of delivery or neonatal outcome. Umbilical cord acid-base status and neurologic adaptive capacity scores did not differ significantly between the two groups. The authors conclude that adding small doses of butorphanol to epidural lidocaine during labor is effective and safe.
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Regional anesthesia · Jul 1991
Randomized Controlled Trial Clinical TrialIntravenous lidocaine does not cause shivering-like tremor or alter thermoregulation.
We tested the hypotheses that systemic absorption of epidural lidocaine: (1) contributes to the shivering-like tremor seen during epidural anesthesia by causing central nervous system disinhibition of spinal reflexes, or (2) activates or alters thermoregulatory mechanisms. In a double-blind, placebo, cross-over study, nine healthy volunteers were given intravenous lidocaine (or saline) to approximate the plasma levels of lidocaine achieved during epidural anesthesia for major abdominal surgery. ⋯ Central temperatures, peripheral vasoconstriction, tremor and clonus were unaffected by intravenous lidocaine. We conclude that the systemic absorption of epidural lidocaine does not contribute to tremor or shivering by these mechanisms.
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Regional anesthesia · Jul 1991
Randomized Controlled Trial Comparative Study Clinical TrialA comparison of postcesarean epidural morphine analgesia by single injection and by continuous infusion.
To assess the relative efficacy and incidence of side effects of a single injection versus a continuous infusion of epidural morphine sulfate (MS) in the postcesarean population, the authors report a prospective, randomized, double-blind study. Thirty-one patients received either a 5-mg MS bolus and subsequent saline infusion (n = 13) or a 2.6-mg MS bolus and subsequent MS infusion at 0.1 mg/hour (n = 18), such that after 24 hours both groups had received a total MS dose of 5 mg. ⋯ The authors conclude that in this population, continuous epidural morphine infusion offers no obvious advantage over single morphine bolus therapy. However, the theoretical merits of continuous opioid infusion therapy are discussed.
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Regional anesthesia · Jul 1991
Randomized Controlled Trial Comparative Study Clinical TrialComparison of onset time between 0.5% bupivacaine and 3% 2-chloroprocaine with and without 75 micrograms fentanyl.
We tested the hypothesis that the addition of 75 micrograms fentanyl to 0.5% bupivacaine would reduce the onset time of surgical anesthesia for cesarean delivery to equal the onset time of 3% 2-chloroprocaine and would have no effect when added to 3% 2-chloroprocaine. Fentanyl was found to reduce the onset time of bupivacaine to equal the onset time of 2-chloroprocaine and have no effect when added to 2-chloroprocaine.