Fig. 1. Resistance to three NMBAs in tetanus. A continuous record from peri-operative evoked electromyographic monitoring (Train-of-four stimulation, a Datex neuromuscular transmission monitor). M: mivacurium (11 mg and 4 mg, intravenously, respectively); A: atracurium (25 mg, intravenously, each dose); V: vecuronium (5 mg, intravenously). The TOF ratio was given in percentage. It is noted that TOF ratio was always higher than 0.70 in the presence of all three NMBAs.