A comparative study of train-of-four (TOF) count at corrugator supercilii and at adductor pollicis reflecting abdominal muscles relaxation

Introduction: Diaphragm and lateral abdominal muscles frequently show sparing effects to muscle relaxants. This study compared visual estimation of neuromuscular transmission corrugator supercilii adductor pollicis (AP) with electromyographic measurements wall during recovery from vecuronium-induced intense block. Methods: 60 patients undergoing elective surgeries under general anesthesia were included. Following loss consciousness, supramaximal stimulations applied using electrical nerve stimlators left 10th intercostal, ulnar facial nerves. Electromyographic activity (EMG) measured. After Inj. Vecuronium 0.1 mg/kg, counted the visually detectable train-of-four (TOF) responses at pollicis. The onset time, duration action quantitative block done. Observations: Clinical vecuronium almost coincided response corrugators where as policis occurred late stage. Corrugators had a stronger positive correlation relaxation policies. coefficient (0.910 vs 0.417) than respect muscle. It indicated that is better predictor AP measure relaxation.