Anesthesia Techniques and Monitors

Acceleromyographic monitoring of neuromuscular block over the orbicularis oris muscle in anesthetized patients receiving vecuronium

Saitoh Y, Oshima T, Nakata Y (Tsujinaka Hosp Kashiwanoha, Chiba, Japan; The Cancer Inst Hosp of Japanese Foundation for Cancer Res, Tokyo, Japan; Teikyo Univ School of Medicine, Tokyo, Japan) J Clin Anesth 22:318-323, 2010^§

Abstract

Study Objective

To evaluate the level of neuromuscular block acceleromyographically over the orbicularis oris muscle.

Design

Prospective, randomized, controlled study.

Setting

Operating room of a university-affiliated hospital.

Patients

36 adult, ASA physical status I and II women scheduled for mastectomy with air-oxygen-isoflurane-fentanyl anesthesia.

Interventions

Patients were randomized to two groups. In the orbicularis oris group (n=18), the facial nerve was stimulated and movement of the orbicularis oris muscle was measured acceleromyographically. In the control group (n=18), adduction of the thumb was quantified mechanically.

Measurements

Onset and recovery of neuromuscular block caused by vecuronium 0.1 mg/kg were compared between the groups.

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