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Partial curarization in the postoperative period.

C Lennmarken, J B Löfström

    Acta Anaesthesiologica Scandinavica
    |June 1, 1984
    PubMed
    Summary
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    Postoperative residual neuromuscular blockade is common, affecting 25% of patients. Clinical assessment of neuromuscular function is unreliable, necessitating intraoperative monitoring to prevent residual curarization.

    Area of Science:

    • Anesthesiology
    • Pharmacology

    Background:

    • Neuromuscular blocking agents are frequently used in general anesthesia.
    • Residual neuromuscular blockade can lead to adverse postoperative respiratory events.

    Purpose of the Study:

    • To evaluate the incidence of residual neuromuscular transmission impairment in the postoperative period.
    • To assess the correlation between clinical tests and quantitative measures of neuromuscular function.

    Main Methods:

    • Randomized evaluation of 48 patients undergoing elective surgery.
    • Assessment of alertness, head lift, and train-of-four (TOF) ratio post-anesthesia.
    • Patients received thiopentone, nitrous oxide, fentanyl, and pancuronium.

    Main Results:

    Related Experiment Videos

  • 25% of patients exhibited markedly impaired neuromuscular transmission.
  • Poor correlation was observed between TOF ratio and the ability to sustain head lift.
  • Impairment occurred despite appropriate pancuronium dosage and adequate reversal time.

    • Conclusions:

    • Residual neuromuscular curarization is a common and clinically difficult-to-assess complication.
    • Clinical tests for neuromuscular function are unreliable predictors of recovery.
    • Continuous monitoring of neuromuscular transmission during anesthesia is recommended to prevent residual curarization.