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Related Experiment Videos

Low-dose clonidine infusion during labour.

M R Tremlett1, P J Kelly, J Parkins

  • 1Department of Anaesthesia, South Cleveland Hospital, Middlesborough, UK.

British Journal of Anaesthesia
|January 5, 2000
PubMed
Summary

This study found that adding clonidine to bupivacaine significantly reduced the required dose of local anesthetic for labor analgesia. Clonidine regimens did not negatively impact maternal sedation or motor function, but slightly increased concerns in fetal heart rate monitoring.

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Area of Science:

  • Anesthesiology
  • Obstetrics
  • Pharmacology

Background:

  • Local anesthetics like bupivacaine are standard for labor analgesia.
  • Adjuvants may enhance local anesthetic efficacy and reduce required doses.
  • Clonidine, an alpha-2 adrenergic agonist, has shown analgesic properties.

Purpose of the Study:

  • To evaluate the efficacy and safety of two different doses of clonidine as an adjunct to 0.03% bupivacaine for labor analgesia.
  • To assess the impact of clonidine on local anesthetic consumption, analgesia quality, motor block, maternal sedation, and maternal/fetal outcomes.

Main Methods:

  • Randomized, double-blind, placebo-controlled study.
  • 45 patients received either 0.03% bupivacaine alone (control) or 0.03% bupivacaine with two different clonidine regimens (bolus + infusion).

Related Experiment Videos

  • Outcomes measured included local anesthetic sparing, analgesia quality, motor weakness, maternal sedation, and maternal/fetal hemodynamics.

    • Main Results:

    • Both clonidine regimens significantly reduced the required amount of local anesthetic (bupivacaine sparing).
    • No significant differences were observed in the quality of analgesia, severity of motor weakness, or maternal sedation.
    • No adverse maternal hemodynamic effects were noted; newborn infants were not sedated.

    Conclusions:

    • Clonidine is effective in reducing local anesthetic requirements for labor analgesia without compromising analgesia quality or increasing maternal sedation/motor block.
    • While not statistically significant, a trend towards increased fetal cardiotocographic concerns warrants further investigation in larger cohorts.
    • Clonidine represents a potentially valuable adjunct for labor epidural anesthesia, improving local anesthetic efficiency.