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Muscle relaxants are very important in anesthetic practice but must be used with great care. Studies have shown that 17-40% of patients in postanesthesia care units (PACU) have residual muscle weakness. The purpose of this study was to evaluate whether the use of neuromuscular monitors during anesthesia could reduce the incidence of muscle weakness in the postoperative period. ⋯ Although we didn t find any benefit from neuromuscular monitoring or using shorter acting drugs, the use of nervestimulators and short acting drugs is still recommended, especially for high risk patients. The generally accepted train-of-four (TOF-) ratio of 70% has been questioned by some authors, recommending a higher ratio (85%). Further studies using a higher TOF-ratio are therefore recommended.