[Effect of isoflurane on muscle relaxation in a patient with myotonic dystrophy]

We did anesthetic management by isoflurane for total thyroidectomy under the neuromuscular transmission monitoring in a patient with myotonic dystrophy. In three patients without neuromuscular disorders, T1 was 85% of control and fade was not observed, while in this case T1 was 40% of the control and TOFR was decreased to 50%. We conclude that isoflurane has a good muscle relaxation effect in this disease and, we could manage without administering any muscle relaxants.