The use of remifentanil without muscle relaxants provides excellent intubating conditions and short recovery duration.7 The effective concentration range of remifentanil for tracheal intubation without muscle relaxant is 4.5-5.5 ng/ml.8 The use of non-muscle relaxant (NMR) anesthetic techniques using remifentanil with either propofol or sevoflurane allows early extubation after trans-sternal or video-assisted thymectomy in myasthenic patients.9-10